1 ;;;; that part of the description of the x86-64 instruction set
2 ;;;; which can live on the cross-compilation host
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
14 ;;; FIXME: SB!DISASSEM: prefixes are used so widely in this file that
15 ;;; I wonder whether the separation of the disassembler from the
16 ;;; virtual machine is valid or adds value.
18 ;;; Note: In CMU CL, this used to be a call to SET-DISASSEM-PARAMS.
19 (setf sb!disassem:*disassem-inst-alignment-bytes* 1)
21 ;;; This type is used mostly in disassembly and represents legacy
22 ;;; registers only. R8-R15 are handled separately.
23 (deftype reg () '(unsigned-byte 3))
25 ;;; This includes legacy registers and R8-R15.
26 (deftype full-reg () '(unsigned-byte 4))
28 ;;; The XMM registers XMM0 - XMM15.
29 (deftype xmmreg () '(unsigned-byte 4))
31 ;;; Default word size for the chip: if the operand size /= :dword
32 ;;; we need to output #x66 (or REX) prefix
33 (def!constant +default-operand-size+ :dword)
35 ;;; The default address size for the chip. It could be overwritten
36 ;;; to :dword with a #x67 prefix, but this is never needed by SBCL
37 ;;; and thus not supported by this assembler/disassembler.
38 (def!constant +default-address-size+ :qword)
40 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
42 (defun offset-next (value dstate)
43 (declare (type integer value)
44 (type sb!disassem:disassem-state dstate))
45 (+ (sb!disassem:dstate-next-addr dstate) value))
47 (defparameter *byte-reg-names*
48 #(al cl dl bl spl bpl sil dil r8b r9b r10b r11b r12b r13b r14b r15b))
49 (defparameter *high-byte-reg-names*
51 (defparameter *word-reg-names*
52 #(ax cx dx bx sp bp si di r8w r9w r10w r11w r12w r13w r14w r15w))
53 (defparameter *dword-reg-names*
54 #(eax ecx edx ebx esp ebp esi edi r8d r9d r10d r11d r12d r13d r14d r15d))
55 (defparameter *qword-reg-names*
56 #(rax rcx rdx rbx rsp rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15))
58 ;;; The printers for registers, memory references and immediates need to
59 ;;; take into account the width bit in the instruction, whether a #x66
60 ;;; or a REX prefix was issued, and the contents of the REX prefix.
61 ;;; This is implemented using prefilters to put flags into the slot
62 ;;; INST-PROPERTIES of the DSTATE. These flags are the following
65 ;;; OPERAND-SIZE-8 The width bit was zero
66 ;;; OPERAND-SIZE-16 The "operand size override" prefix (#x66) was found
67 ;;; REX A REX prefix was found
68 ;;; REX-W A REX prefix with the "operand width" bit set was
70 ;;; REX-R A REX prefix with the "register" bit set was found
71 ;;; REX-X A REX prefix with the "index" bit set was found
72 ;;; REX-B A REX prefix with the "base" bit set was found
74 ;;; Return the operand size depending on the prefixes and width bit as
76 (defun inst-operand-size (dstate)
77 (declare (type sb!disassem:disassem-state dstate))
78 (cond ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-8)
80 ((sb!disassem:dstate-get-inst-prop dstate 'rex-w)
82 ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
85 +default-operand-size+)))
87 ;;; The same as INST-OPERAND-SIZE, but for those instructions (e.g.
88 ;;; PUSH, JMP) that have a default operand size of :qword. It can only
89 ;;; be overwritten to :word.
90 (defun inst-operand-size-default-qword (dstate)
91 (declare (type sb!disassem:disassem-state dstate))
92 (if (sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
96 ;;; Print to STREAM the name of the general-purpose register encoded by
97 ;;; VALUE and of size WIDTH. For robustness, the high byte registers
98 ;;; (AH, BH, CH, DH) are correctly detected, too, although the compiler
99 ;;; does not use them.
100 (defun print-reg-with-width (value width stream dstate)
101 (declare (type full-reg value)
103 (type sb!disassem:disassem-state dstate))
104 (princ (if (and (eq width :byte)
106 (not (sb!disassem:dstate-get-inst-prop dstate 'rex)))
107 (aref *high-byte-reg-names* (- value 4))
109 (:byte *byte-reg-names*)
110 (:word *word-reg-names*)
111 (:dword *dword-reg-names*)
112 (:qword *qword-reg-names*))
115 ;; XXX plus should do some source-var notes
118 (defun print-reg (value stream dstate)
119 (declare (type full-reg value)
121 (type sb!disassem:disassem-state dstate))
122 (print-reg-with-width value
123 (inst-operand-size dstate)
127 (defun print-reg-default-qword (value stream dstate)
128 (declare (type full-reg value)
130 (type sb!disassem:disassem-state dstate))
131 (print-reg-with-width value
132 (inst-operand-size-default-qword dstate)
136 (defun print-byte-reg (value stream dstate)
137 (declare (type full-reg value)
139 (type sb!disassem:disassem-state dstate))
140 (print-reg-with-width value :byte stream dstate))
142 (defun print-addr-reg (value stream dstate)
143 (declare (type full-reg value)
145 (type sb!disassem:disassem-state dstate))
146 (print-reg-with-width value +default-address-size+ stream dstate))
148 ;;; Print a register or a memory reference of the given WIDTH.
149 ;;; If SIZED-P is true, add an explicit size indicator for memory
151 (defun print-reg/mem-with-width (value width sized-p stream dstate)
152 (declare (type (or list full-reg) value)
153 (type (member :byte :word :dword :qword) width)
154 (type boolean sized-p)
156 (type sb!disassem:disassem-state dstate))
157 (if (typep value 'full-reg)
158 (print-reg-with-width value width stream dstate)
159 (print-mem-access value (and sized-p width) stream dstate)))
161 ;;; Print a register or a memory reference. The width is determined by
162 ;;; calling INST-OPERAND-SIZE.
163 (defun print-reg/mem (value stream dstate)
164 (declare (type (or list full-reg) value)
166 (type sb!disassem:disassem-state dstate))
167 (print-reg/mem-with-width
168 value (inst-operand-size dstate) nil stream dstate))
170 ;; Same as print-reg/mem, but prints an explicit size indicator for
171 ;; memory references.
172 (defun print-sized-reg/mem (value stream dstate)
173 (declare (type (or list full-reg) value)
175 (type sb!disassem:disassem-state dstate))
176 (print-reg/mem-with-width
177 value (inst-operand-size dstate) t stream dstate))
179 ;;; Same as print-sized-reg/mem, but with a default operand size of
181 (defun print-sized-reg/mem-default-qword (value stream dstate)
182 (declare (type (or list full-reg) value)
184 (type sb!disassem:disassem-state dstate))
185 (print-reg/mem-with-width
186 value (inst-operand-size-default-qword dstate) t stream dstate))
188 (defun print-sized-byte-reg/mem (value stream dstate)
189 (declare (type (or list full-reg) value)
191 (type sb!disassem:disassem-state dstate))
192 (print-reg/mem-with-width value :byte t stream dstate))
194 (defun print-sized-word-reg/mem (value stream dstate)
195 (declare (type (or list full-reg) value)
197 (type sb!disassem:disassem-state dstate))
198 (print-reg/mem-with-width value :word t stream dstate))
200 (defun print-sized-dword-reg/mem (value stream dstate)
201 (declare (type (or list full-reg) value)
203 (type sb!disassem:disassem-state dstate))
204 (print-reg/mem-with-width value :dword t stream dstate))
206 (defun print-label (value stream dstate)
207 (declare (ignore dstate))
208 (sb!disassem:princ16 value stream))
210 (defun print-xmmreg (value stream dstate)
211 (declare (type xmmreg value)
214 (format stream "XMM~d" value))
216 (defun print-xmmreg/mem (value stream dstate)
217 (declare (type (or list xmmreg) value)
219 (type sb!disassem:disassem-state dstate))
220 (if (typep value 'xmmreg)
221 (print-xmmreg value stream dstate)
222 (print-mem-access value nil stream dstate)))
224 ;; Same as print-xmmreg/mem, but prints an explicit size indicator for
225 ;; memory references.
226 (defun print-sized-xmmreg/mem (value stream dstate)
227 (declare (type (or list xmmreg) value)
229 (type sb!disassem:disassem-state dstate))
230 (if (typep value 'xmmreg)
231 (print-xmmreg value stream dstate)
232 (print-mem-access value (inst-operand-size dstate) stream dstate)))
234 ;;; This prefilter is used solely for its side effects, namely to put
235 ;;; the bits found in the REX prefix into the DSTATE for use by other
236 ;;; prefilters and by printers.
237 (defun prefilter-wrxb (value dstate)
238 (declare (type (unsigned-byte 4) value)
239 (type sb!disassem:disassem-state dstate))
240 (sb!disassem:dstate-put-inst-prop dstate 'rex)
241 (when (plusp (logand value #b1000))
242 (sb!disassem:dstate-put-inst-prop dstate 'rex-w))
243 (when (plusp (logand value #b0100))
244 (sb!disassem:dstate-put-inst-prop dstate 'rex-r))
245 (when (plusp (logand value #b0010))
246 (sb!disassem:dstate-put-inst-prop dstate 'rex-x))
247 (when (plusp (logand value #b0001))
248 (sb!disassem:dstate-put-inst-prop dstate 'rex-b))
251 ;;; This prefilter is used solely for its side effect, namely to put
252 ;;; the property OPERAND-SIZE-8 into the DSTATE if VALUE is 0.
253 (defun prefilter-width (value dstate)
254 (declare (type bit value)
255 (type sb!disassem:disassem-state dstate))
257 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-8))
260 ;;; This prefilter is used solely for its side effect, namely to put
261 ;;; the property OPERAND-SIZE-16 into the DSTATE.
262 (defun prefilter-x66 (value dstate)
263 (declare (type (eql #x66) value)
265 (type sb!disassem:disassem-state dstate))
266 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-16))
268 ;;; A register field that can be extended by REX.R.
269 (defun prefilter-reg-r (value dstate)
270 (declare (type reg value)
271 (type sb!disassem:disassem-state dstate))
272 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-r)
276 ;;; A register field that can be extended by REX.B.
277 (defun prefilter-reg-b (value dstate)
278 (declare (type reg value)
279 (type sb!disassem:disassem-state dstate))
280 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-b)
284 ;;; Returns either an integer, meaning a register, or a list of
285 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
286 ;;; may be missing or nil to indicate that it's not used or has the
287 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
288 ;;; of the mod and r/m field of the ModRM byte of the instruction.
289 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
290 ;;; REX.B bit from DSTATE is used to extend the sole register or the
291 ;;; BASE-REG to a full register, the REX.X bit does the same for the
293 (defun prefilter-reg/mem (value dstate)
294 (declare (type list value)
295 (type sb!disassem:disassem-state dstate))
296 (let ((mod (first value))
297 (r/m (second value)))
298 (declare (type (unsigned-byte 2) mod)
299 (type (unsigned-byte 3) r/m))
300 (let ((full-reg (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
303 (declare (type full-reg full-reg))
309 (let ((sib (sb!disassem:read-suffix 8 dstate)))
310 (declare (type (unsigned-byte 8) sib))
311 (let ((base-reg (ldb (byte 3 0) sib))
312 (index-reg (ldb (byte 3 3) sib))
313 (index-scale (ldb (byte 2 6) sib)))
314 (declare (type (unsigned-byte 3) base-reg index-reg)
315 (type (unsigned-byte 2) index-scale))
319 (if (= base-reg #b101)
320 (sb!disassem:read-signed-suffix 32 dstate)
323 (sb!disassem:read-signed-suffix 8 dstate))
325 (sb!disassem:read-signed-suffix 32 dstate)))))
326 (list (unless (and (= mod #b00) (= base-reg #b101))
327 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
331 (unless (= index-reg #b100)
332 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-x)
335 (ash 1 index-scale))))))
336 ((and (= mod #b00) (= r/m #b101))
337 (list 'rip (sb!disassem:read-signed-suffix 32 dstate)))
341 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
343 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
345 (defun read-address (value dstate)
346 (declare (ignore value)) ; always nil anyway
347 (sb!disassem:read-suffix (width-bits (inst-operand-size dstate)) dstate))
349 (defun width-bits (width)
358 ;;;; disassembler argument types
360 ;;; Used to capture the lower four bits of the REX prefix.
361 (sb!disassem:define-arg-type wrxb
362 :prefilter #'prefilter-wrxb)
364 (sb!disassem:define-arg-type width
365 :prefilter #'prefilter-width
366 :printer (lambda (value stream dstate)
367 (declare (ignore value))
368 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
371 ;;; Used to capture the effect of the #x66 operand size override prefix.
372 (sb!disassem:define-arg-type x66
373 :prefilter #'prefilter-x66)
375 (sb!disassem:define-arg-type displacement
377 :use-label #'offset-next
378 :printer (lambda (value stream dstate)
379 (sb!disassem:maybe-note-assembler-routine value nil dstate)
380 (print-label value stream dstate)))
382 (sb!disassem:define-arg-type accum
383 :printer (lambda (value stream dstate)
384 (declare (ignore value)
386 (type sb!disassem:disassem-state dstate))
387 (print-reg 0 stream dstate)))
389 (sb!disassem:define-arg-type reg
390 :prefilter #'prefilter-reg-r
391 :printer #'print-reg)
393 (sb!disassem:define-arg-type reg-b
394 :prefilter #'prefilter-reg-b
395 :printer #'print-reg)
397 (sb!disassem:define-arg-type reg-b-default-qword
398 :prefilter #'prefilter-reg-b
399 :printer #'print-reg-default-qword)
401 (sb!disassem:define-arg-type imm-addr
402 :prefilter #'read-address
403 :printer #'print-label)
405 ;;; Normally, immediate values for an operand size of :qword are of size
406 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
407 ;;; argument type definition following this one.
408 (sb!disassem:define-arg-type signed-imm-data
409 :prefilter (lambda (value dstate)
410 (declare (ignore value)) ; always nil anyway
411 (let ((width (width-bits (inst-operand-size dstate))))
414 (sb!disassem:read-signed-suffix width dstate))))
416 ;;; Used by the variant of the MOV instruction with opcode B8 which can
417 ;;; move immediates of all sizes (i.e. including :qword) into a
419 (sb!disassem:define-arg-type signed-imm-data-upto-qword
420 :prefilter (lambda (value dstate)
421 (declare (ignore value)) ; always nil anyway
422 (sb!disassem:read-signed-suffix
423 (width-bits (inst-operand-size dstate))
426 ;;; Used by those instructions that have a default operand size of
427 ;;; :qword. Nevertheless the immediate is at most of size :dword.
428 ;;; The only instruction of this kind having a variant with an immediate
429 ;;; argument is PUSH.
430 (sb!disassem:define-arg-type signed-imm-data-default-qword
431 :prefilter (lambda (value dstate)
432 (declare (ignore value)) ; always nil anyway
433 (let ((width (width-bits
434 (inst-operand-size-default-qword dstate))))
437 (sb!disassem:read-signed-suffix width dstate))))
439 (sb!disassem:define-arg-type signed-imm-byte
440 :prefilter (lambda (value dstate)
441 (declare (ignore value)) ; always nil anyway
442 (sb!disassem:read-signed-suffix 8 dstate)))
444 (sb!disassem:define-arg-type imm-byte
445 :prefilter (lambda (value dstate)
446 (declare (ignore value)) ; always nil anyway
447 (sb!disassem:read-suffix 8 dstate)))
449 ;;; needed for the ret imm16 instruction
450 (sb!disassem:define-arg-type imm-word-16
451 :prefilter (lambda (value dstate)
452 (declare (ignore value)) ; always nil anyway
453 (sb!disassem:read-suffix 16 dstate)))
455 (sb!disassem:define-arg-type reg/mem
456 :prefilter #'prefilter-reg/mem
457 :printer #'print-reg/mem)
458 (sb!disassem:define-arg-type sized-reg/mem
459 ;; Same as reg/mem, but prints an explicit size indicator for
460 ;; memory references.
461 :prefilter #'prefilter-reg/mem
462 :printer #'print-sized-reg/mem)
464 ;;; Arguments of type reg/mem with a fixed size.
465 (sb!disassem:define-arg-type sized-byte-reg/mem
466 :prefilter #'prefilter-reg/mem
467 :printer #'print-sized-byte-reg/mem)
468 (sb!disassem:define-arg-type sized-word-reg/mem
469 :prefilter #'prefilter-reg/mem
470 :printer #'print-sized-word-reg/mem)
471 (sb!disassem:define-arg-type sized-dword-reg/mem
472 :prefilter #'prefilter-reg/mem
473 :printer #'print-sized-dword-reg/mem)
475 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
476 (sb!disassem:define-arg-type sized-reg/mem-default-qword
477 :prefilter #'prefilter-reg/mem
478 :printer #'print-sized-reg/mem-default-qword)
481 (sb!disassem:define-arg-type xmmreg
482 :prefilter #'prefilter-reg-r
483 :printer #'print-xmmreg)
485 (sb!disassem:define-arg-type xmmreg-b
486 :prefilter #'prefilter-reg-b
487 :printer #'print-xmmreg)
489 (sb!disassem:define-arg-type xmmreg/mem
490 :prefilter #'prefilter-reg/mem
491 :printer #'print-xmmreg/mem)
493 (sb!disassem:define-arg-type sized-xmmreg/mem
494 :prefilter #'prefilter-reg/mem
495 :printer #'print-sized-xmmreg/mem)
498 (eval-when (:compile-toplevel :load-toplevel :execute)
499 (defparameter *conditions*
502 (:b . 2) (:nae . 2) (:c . 2)
503 (:nb . 3) (:ae . 3) (:nc . 3)
504 (:eq . 4) (:e . 4) (:z . 4)
511 (:np . 11) (:po . 11)
512 (:l . 12) (:nge . 12)
513 (:nl . 13) (:ge . 13)
514 (:le . 14) (:ng . 14)
515 (:nle . 15) (:g . 15)))
516 (defparameter *condition-name-vec*
517 (let ((vec (make-array 16 :initial-element nil)))
518 (dolist (cond *conditions*)
519 (when (null (aref vec (cdr cond)))
520 (setf (aref vec (cdr cond)) (car cond))))
524 ;;; Set assembler parameters. (In CMU CL, this was done with
525 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
526 (eval-when (:compile-toplevel :load-toplevel :execute)
527 (setf sb!assem:*assem-scheduler-p* nil))
529 (sb!disassem:define-arg-type condition-code
530 :printer *condition-name-vec*)
532 (defun conditional-opcode (condition)
533 (cdr (assoc condition *conditions* :test #'eq)))
535 ;;;; disassembler instruction formats
537 (eval-when (:compile-toplevel :execute)
538 (defun swap-if (direction field1 separator field2)
539 `(:if (,direction :constant 0)
540 (,field1 ,separator ,field2)
541 (,field2 ,separator ,field1))))
543 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
544 (op :field (byte 8 0))
549 (sb!disassem:define-instruction-format (two-bytes 16
550 :default-printer '(:name))
551 (op :fields (list (byte 8 0) (byte 8 8))))
553 (sb!disassem:define-instruction-format (three-bytes 24
554 :default-printer '(:name))
555 (op :fields (list (byte 8 0) (byte 8 8) (byte 8 16))))
557 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
558 ;;; operand size of :word.
559 (sb!disassem:define-instruction-format (x66-byte 16
560 :default-printer '(:name))
561 (x66 :field (byte 8 0) :value #x66)
562 (op :field (byte 8 8)))
564 ;;; A one-byte instruction with a REX prefix, used to indicate an
565 ;;; operand size of :qword. REX.W must be 1, the other three bits are
567 (sb!disassem:define-instruction-format (rex-byte 16
568 :default-printer '(:name))
569 (rex :field (byte 5 3) :value #b01001)
570 (op :field (byte 8 8)))
572 (sb!disassem:define-instruction-format (simple 8)
573 (op :field (byte 7 1))
574 (width :field (byte 1 0) :type 'width)
579 (sb!disassem:define-instruction-format (rex-simple 16)
580 (rex :field (byte 4 4) :value #b0100)
581 (wrxb :field (byte 4 0) :type 'wrxb)
582 (op :field (byte 7 9))
583 (width :field (byte 1 8) :type 'width)
588 ;;; Same as simple, but with direction bit
589 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
590 (op :field (byte 6 2))
591 (dir :field (byte 1 1)))
593 ;;; Same as simple, but with the immediate value occurring by default,
594 ;;; and with an appropiate printer.
595 (sb!disassem:define-instruction-format (accum-imm 8
597 :default-printer '(:name
598 :tab accum ", " imm))
599 (imm :type 'signed-imm-data))
601 (sb!disassem:define-instruction-format (rex-accum-imm 16
603 :default-printer '(:name
604 :tab accum ", " imm))
605 (imm :type 'signed-imm-data))
607 (sb!disassem:define-instruction-format (reg-no-width 8
608 :default-printer '(:name :tab reg))
609 (op :field (byte 5 3))
610 (reg :field (byte 3 0) :type 'reg-b)
615 (sb!disassem:define-instruction-format (rex-reg-no-width 16
616 :default-printer '(:name :tab reg))
617 (rex :field (byte 4 4) :value #b0100)
618 (wrxb :field (byte 4 0) :type 'wrxb)
619 (op :field (byte 5 11))
620 (reg :field (byte 3 8) :type 'reg-b)
625 ;;; Same as reg-no-width, but with a default operand size of :qword.
626 (sb!disassem:define-instruction-format (reg-no-width-default-qword 8
627 :include 'reg-no-width
628 :default-printer '(:name :tab reg))
629 (reg :type 'reg-b-default-qword))
631 ;;; Same as rex-reg-no-width, but with a default operand size of :qword.
632 (sb!disassem:define-instruction-format (rex-reg-no-width-default-qword 16
633 :include 'rex-reg-no-width
634 :default-printer '(:name :tab reg))
635 (reg :type 'reg-b-default-qword))
637 ;;; Adds a width field to reg-no-width. Note that we can't use
638 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
639 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
640 ;;; the one for IMM to be able to determine the correct size of IMM.
641 (sb!disassem:define-instruction-format (reg 8
642 :default-printer '(:name :tab reg))
643 (op :field (byte 4 4))
644 (width :field (byte 1 3) :type 'width)
645 (reg :field (byte 3 0) :type 'reg-b)
650 (sb!disassem:define-instruction-format (rex-reg 16
651 :default-printer '(:name :tab reg))
652 (rex :field (byte 4 4) :value #b0100)
653 (wrxb :field (byte 4 0) :type 'wrxb)
654 (width :field (byte 1 11) :type 'width)
655 (op :field (byte 4 12))
656 (reg :field (byte 3 8) :type 'reg-b)
661 (sb!disassem:define-instruction-format (two-bytes 16
662 :default-printer '(:name))
663 (op :fields (list (byte 8 0) (byte 8 8))))
665 (sb!disassem:define-instruction-format (reg-reg/mem 16
667 `(:name :tab reg ", " reg/mem))
668 (op :field (byte 7 1))
669 (width :field (byte 1 0) :type 'width)
670 (reg/mem :fields (list (byte 2 14) (byte 3 8))
672 (reg :field (byte 3 11) :type 'reg)
676 (sb!disassem:define-instruction-format (rex-reg-reg/mem 24
678 `(:name :tab reg ", " reg/mem))
679 (rex :field (byte 4 4) :value #b0100)
680 (wrxb :field (byte 4 0) :type 'wrxb)
681 (width :field (byte 1 8) :type 'width)
682 (op :field (byte 7 9))
683 (reg/mem :fields (list (byte 2 22) (byte 3 16))
685 (reg :field (byte 3 19) :type 'reg)
689 ;;; same as reg-reg/mem, but with direction bit
690 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
691 :include 'reg-reg/mem
695 ,(swap-if 'dir 'reg/mem ", " 'reg)))
696 (op :field (byte 6 2))
697 (dir :field (byte 1 1)))
699 (sb!disassem:define-instruction-format (rex-reg-reg/mem-dir 24
700 :include 'rex-reg-reg/mem
704 ,(swap-if 'dir 'reg/mem ", " 'reg)))
705 (op :field (byte 6 10))
706 (dir :field (byte 1 9)))
708 (sb!disassem:define-instruction-format (x66-reg-reg/mem-dir 24
712 ,(swap-if 'dir 'reg/mem ", " 'reg)))
713 (x66 :field (byte 8 0) :type 'x66 :value #x66)
714 (op :field (byte 6 10))
715 (dir :field (byte 1 9))
716 (width :field (byte 1 8) :type 'width)
717 (reg/mem :fields (list (byte 2 22) (byte 3 16))
719 (reg :field (byte 3 19) :type 'reg))
721 (sb!disassem:define-instruction-format (x66-rex-reg-reg/mem-dir 32
725 ,(swap-if 'dir 'reg/mem ", " 'reg)))
726 (x66 :field (byte 8 0) :type 'x66 :value #x66)
727 (rex :field (byte 4 12) :value #b0100)
728 (wrxb :field (byte 4 8) :type 'wrxb)
729 (op :field (byte 6 18))
730 (dir :field (byte 1 17))
731 (width :field (byte 1 16) :type 'width)
732 (reg/mem :fields (list (byte 2 30) (byte 3 24))
734 (reg :field (byte 3 27) :type 'reg))
736 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
737 (sb!disassem:define-instruction-format (reg/mem 16
738 :default-printer '(:name :tab reg/mem))
739 (op :fields (list (byte 7 1) (byte 3 11)))
740 (width :field (byte 1 0) :type 'width)
741 (reg/mem :fields (list (byte 2 14) (byte 3 8))
742 :type 'sized-reg/mem)
746 (sb!disassem:define-instruction-format (rex-reg/mem 24
747 :default-printer '(:name :tab reg/mem))
748 (rex :field (byte 4 4) :value #b0100)
749 (wrxb :field (byte 4 0) :type 'wrxb)
750 (op :fields (list (byte 7 9) (byte 3 19)))
751 (width :field (byte 1 8) :type 'width)
752 (reg/mem :fields (list (byte 2 22) (byte 3 16))
753 :type 'sized-reg/mem)
757 ;;; Same as reg/mem, but without a width field and with a default
758 ;;; operand size of :qword.
759 (sb!disassem:define-instruction-format (reg/mem-default-qword 16
760 :default-printer '(:name :tab reg/mem))
761 (op :fields (list (byte 8 0) (byte 3 11)))
762 (reg/mem :fields (list (byte 2 14) (byte 3 8))
763 :type 'sized-reg/mem-default-qword))
765 (sb!disassem:define-instruction-format (rex-reg/mem-default-qword 24
766 :default-printer '(:name :tab reg/mem))
767 (rex :field (byte 4 4) :value #b0100)
768 (wrxb :field (byte 4 0) :type 'wrxb)
769 (op :fields (list (byte 8 8) (byte 3 19)))
770 (reg/mem :fields (list (byte 2 22) (byte 3 16))
771 :type 'sized-reg/mem-default-qword))
773 ;;; Same as reg/mem, but with the immediate value occurring by default,
774 ;;; and with an appropiate printer.
775 (sb!disassem:define-instruction-format (reg/mem-imm 16
778 '(:name :tab reg/mem ", " imm))
779 (reg/mem :type 'sized-reg/mem)
780 (imm :type 'signed-imm-data))
782 (sb!disassem:define-instruction-format (rex-reg/mem-imm 24
783 :include 'rex-reg/mem
785 '(:name :tab reg/mem ", " imm))
786 (reg/mem :type 'sized-reg/mem)
787 (imm :type 'signed-imm-data))
789 ;;; Same as reg/mem, but with using the accumulator in the default printer
790 (sb!disassem:define-instruction-format
792 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
793 (reg/mem :type 'reg/mem) ; don't need a size
794 (accum :type 'accum))
796 (sb!disassem:define-instruction-format (rex-accum-reg/mem 24
797 :include 'rex-reg/mem
799 '(:name :tab accum ", " reg/mem))
800 (reg/mem :type 'reg/mem) ; don't need a size
801 (accum :type 'accum))
803 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
804 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
806 `(:name :tab reg ", " reg/mem))
807 (prefix :field (byte 8 0) :value #b00001111)
808 (op :field (byte 7 9))
809 (width :field (byte 1 8) :type 'width)
810 (reg/mem :fields (list (byte 2 22) (byte 3 16))
812 (reg :field (byte 3 19) :type 'reg)
816 (sb!disassem:define-instruction-format (ext-reg-reg/mem-no-width 24
818 `(:name :tab reg ", " reg/mem))
819 (prefix :field (byte 8 0) :value #b00001111)
820 (op :field (byte 8 8))
821 (reg/mem :fields (list (byte 2 22) (byte 3 16))
823 (reg :field (byte 3 19) :type 'reg))
825 (sb!disassem:define-instruction-format (rex-ext-reg-reg/mem-no-width 32
827 `(:name :tab reg ", " reg/mem))
828 (rex :field (byte 4 4) :value #b0100)
829 (wrxb :field (byte 4 0) :type 'wrxb)
830 (prefix :field (byte 8 8) :value #b00001111)
831 (op :field (byte 8 16))
832 (reg/mem :fields (list (byte 2 30) (byte 3 24))
834 (reg :field (byte 3 27) :type 'reg))
836 (sb!disassem:define-instruction-format (ext-reg/mem-no-width 24
838 `(:name :tab reg/mem))
839 (prefix :field (byte 8 0) :value #b00001111)
840 (op :fields (list (byte 8 8) (byte 3 19)))
841 (reg/mem :fields (list (byte 2 22) (byte 3 16))
844 (sb!disassem:define-instruction-format (rex-ext-reg/mem-no-width 32
846 `(:name :tab reg/mem))
847 (rex :field (byte 4 4) :value #b0100)
848 (wrxb :field (byte 4 0) :type 'wrxb)
849 (prefix :field (byte 8 8) :value #b00001111)
850 (op :fields (list (byte 8 16) (byte 3 27)))
851 (reg/mem :fields (list (byte 2 30) (byte 3 24))
854 ;;; reg-no-width with #x0f prefix
855 (sb!disassem:define-instruction-format (ext-reg-no-width 16
856 :default-printer '(:name :tab reg))
857 (prefix :field (byte 8 0) :value #b00001111)
858 (op :field (byte 5 11))
859 (reg :field (byte 3 8) :type 'reg-b))
861 ;;; Same as reg/mem, but with a prefix of #b00001111
862 (sb!disassem:define-instruction-format (ext-reg/mem 24
863 :default-printer '(:name :tab reg/mem))
864 (prefix :field (byte 8 0) :value #b00001111)
865 (op :fields (list (byte 7 9) (byte 3 19)))
866 (width :field (byte 1 8) :type 'width)
867 (reg/mem :fields (list (byte 2 22) (byte 3 16))
868 :type 'sized-reg/mem)
872 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
873 :include 'ext-reg/mem
875 '(:name :tab reg/mem ", " imm))
876 (imm :type 'signed-imm-data))
878 ;;;; XMM instructions
880 ;;; All XMM instructions use an extended opcode (#x0F as the first
881 ;;; opcode byte). Therefore in the following "EXT" in the name of the
882 ;;; instruction formats refers to the formats that have an additional
883 ;;; prefix (#x66, #xF2 or #xF3).
885 ;;; Instructions having an XMM register as the destination operand
886 ;;; and an XMM register or a memory location as the source operand.
887 ;;; The size of the operands is implicitly given by the instruction.
888 (sb!disassem:define-instruction-format (xmm-xmm/mem 24
890 '(:name :tab reg ", " reg/mem))
891 (x0f :field (byte 8 0) :value #x0f)
892 (op :field (byte 8 8))
893 (reg/mem :fields (list (byte 2 22) (byte 3 16))
895 (reg :field (byte 3 19) :type 'xmmreg))
897 (sb!disassem:define-instruction-format (rex-xmm-xmm/mem 32
899 '(:name :tab reg ", " reg/mem))
900 (rex :field (byte 4 4) :value #b0100)
901 (wrxb :field (byte 4 0) :type 'wrxb)
902 (x0f :field (byte 8 8) :value #x0f)
903 (op :field (byte 8 16))
904 (reg/mem :fields (list (byte 2 30) (byte 3 24))
906 (reg :field (byte 3 27) :type 'xmmreg))
908 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem 32
910 '(:name :tab reg ", " reg/mem))
911 (prefix :field (byte 8 0))
912 (x0f :field (byte 8 8) :value #x0f)
913 (op :field (byte 8 16))
914 (reg/mem :fields (list (byte 2 30) (byte 3 24))
916 (reg :field (byte 3 27) :type 'xmmreg))
918 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem 40
920 '(:name :tab reg ", " reg/mem))
921 (prefix :field (byte 8 0))
922 (rex :field (byte 4 12) :value #b0100)
923 (wrxb :field (byte 4 8) :type 'wrxb)
924 (x0f :field (byte 8 16) :value #x0f)
925 (op :field (byte 8 24))
926 (reg/mem :fields (list (byte 2 38) (byte 3 32))
928 (reg :field (byte 3 35) :type 'xmmreg))
930 ;;; Same as xmm-xmm/mem etc., but with direction bit.
932 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-dir 32
933 :include 'ext-xmm-xmm/mem
937 ,(swap-if 'dir 'reg ", " 'reg/mem)))
938 (op :field (byte 7 17))
939 (dir :field (byte 1 16)))
941 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-dir 40
942 :include 'ext-rex-xmm-xmm/mem
946 ,(swap-if 'dir 'reg ", " 'reg/mem)))
947 (op :field (byte 7 25))
948 (dir :field (byte 1 24)))
950 ;;; Instructions having an XMM register as one operand
951 ;;; and a constant (unsigned) byte as the other.
953 (sb!disassem:define-instruction-format (ext-xmm-imm 32
955 '(:name :tab reg/mem ", " imm))
956 (prefix :field (byte 8 0))
957 (x0f :field (byte 8 8) :value #x0f)
958 (op :field (byte 8 16))
959 (/i :field (byte 3 27))
960 (b11 :field (byte 2 30) :value #b11)
961 (reg/mem :field (byte 3 24)
963 (imm :type 'imm-byte))
965 (sb!disassem:define-instruction-format (ext-rex-xmm-imm 40
967 '(:name :tab reg/mem ", " imm))
968 (prefix :field (byte 8 0))
969 (rex :field (byte 4 12) :value #b0100)
970 (wrxb :field (byte 4 8) :type 'wrxb)
971 (x0f :field (byte 8 16) :value #x0f)
972 (op :field (byte 8 24))
973 (/i :field (byte 3 35))
974 (b11 :field (byte 2 38) :value #b11)
975 (reg/mem :field (byte 3 32)
977 (imm :type 'imm-byte))
979 ;;; Instructions having an XMM register as one operand and a general-
980 ;;; -purpose register or a memory location as the other operand.
982 (sb!disassem:define-instruction-format (xmm-reg/mem 24
984 '(:name :tab reg ", " reg/mem))
985 (x0f :field (byte 8 0) :value #x0f)
986 (op :field (byte 8 8))
987 (reg/mem :fields (list (byte 2 22) (byte 3 16))
988 :type 'sized-reg/mem)
989 (reg :field (byte 3 19) :type 'xmmreg))
991 (sb!disassem:define-instruction-format (rex-xmm-reg/mem 32
993 '(:name :tab reg ", " reg/mem))
994 (rex :field (byte 4 4) :value #b0100)
995 (wrxb :field (byte 4 0) :type 'wrxb)
996 (x0f :field (byte 8 8) :value #x0f)
997 (op :field (byte 8 16))
998 (reg/mem :fields (list (byte 2 30) (byte 3 24))
999 :type 'sized-reg/mem)
1000 (reg :field (byte 3 27) :type 'xmmreg))
1002 (sb!disassem:define-instruction-format (ext-xmm-reg/mem 32
1004 '(:name :tab reg ", " reg/mem))
1005 (prefix :field (byte 8 0))
1006 (x0f :field (byte 8 8) :value #x0f)
1007 (op :field (byte 8 16))
1008 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1009 :type 'sized-reg/mem)
1010 (reg :field (byte 3 27) :type 'xmmreg))
1012 (sb!disassem:define-instruction-format (ext-rex-xmm-reg/mem 40
1014 '(:name :tab reg ", " reg/mem))
1015 (prefix :field (byte 8 0))
1016 (rex :field (byte 4 12) :value #b0100)
1017 (wrxb :field (byte 4 8) :type 'wrxb)
1018 (x0f :field (byte 8 16) :value #x0f)
1019 (op :field (byte 8 24))
1020 (reg/mem :fields (list (byte 2 38) (byte 3 32))
1021 :type 'sized-reg/mem)
1022 (reg :field (byte 3 35) :type 'xmmreg))
1024 ;;; Instructions having a general-purpose register as one operand and an
1025 ;;; XMM register or a memory location as the other operand.
1027 (sb!disassem:define-instruction-format (reg-xmm/mem 24
1029 '(:name :tab reg ", " reg/mem))
1030 (x0f :field (byte 8 0) :value #x0f)
1031 (op :field (byte 8 8))
1032 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1033 :type 'sized-xmmreg/mem)
1034 (reg :field (byte 3 19) :type 'reg))
1036 (sb!disassem:define-instruction-format (rex-reg-xmm/mem 32
1038 '(:name :tab reg ", " reg/mem))
1039 (rex :field (byte 4 4) :value #b0100)
1040 (wrxb :field (byte 4 0) :type 'wrxb)
1041 (x0f :field (byte 8 8) :value #x0f)
1042 (op :field (byte 8 16))
1043 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1044 :type 'sized-xmmreg/mem)
1045 (reg :field (byte 3 27) :type 'reg))
1047 (sb!disassem:define-instruction-format (ext-reg-xmm/mem 32
1049 '(:name :tab reg ", " reg/mem))
1050 (prefix :field (byte 8 0))
1051 (x0f :field (byte 8 8) :value #x0f)
1052 (op :field (byte 8 16))
1053 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1054 :type 'sized-xmmreg/mem)
1055 (reg :field (byte 3 27) :type 'reg))
1057 (sb!disassem:define-instruction-format (ext-rex-reg-xmm/mem 40
1059 '(:name :tab reg ", " reg/mem))
1060 (prefix :field (byte 8 0))
1061 (rex :field (byte 4 12) :value #b0100)
1062 (wrxb :field (byte 4 8) :type 'wrxb)
1063 (x0f :field (byte 8 16) :value #x0f)
1064 (op :field (byte 8 24))
1065 (reg/mem :fields (list (byte 2 38) (byte 3 32))
1066 :type 'sized-xmmreg/mem)
1067 (reg :field (byte 3 35) :type 'reg))
1069 ;; XMM comparison instruction
1071 (eval-when (:compile-toplevel :load-toplevel :execute)
1072 (defparameter *sse-conditions* #(:eq :lt :le :unord :neq :nlt :nle :ord)))
1074 (sb!disassem:define-arg-type sse-condition-code
1075 :printer *sse-conditions*)
1077 (sb!disassem:define-instruction-format (xmm-xmm/mem-cmp 32
1079 '(:name " " cc :tab reg ", " reg/mem))
1080 (x0f :field (byte 8 0) :value #x0f)
1081 (op :field (byte 8 8))
1082 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1084 (reg :field (byte 3 19) :type 'xmmreg)
1085 (cc :field (byte 8 24) :type 'sse-condition-code))
1087 (sb!disassem:define-instruction-format (rex-xmm-xmm/mem-cmp 40
1089 '(:name " " cc :tab reg ", " reg/mem))
1090 (rex :field (byte 4 4) :value #b0100)
1091 (wrxb :field (byte 4 0) :type 'wrxb)
1092 (x0f :field (byte 8 8) :value #x0f)
1093 (op :field (byte 8 16))
1094 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1096 (reg :field (byte 3 27) :type 'xmmreg)
1097 (cc :field (byte 8 32) :type 'sse-condition-code))
1099 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-cmp 40
1101 '(:name " " cc :tab reg ", " reg/mem))
1102 (prefix :field (byte 8 0))
1103 (x0f :field (byte 8 8) :value #x0f)
1104 (op :field (byte 8 16))
1105 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1107 (reg :field (byte 3 27) :type 'xmmreg)
1108 (cc :field (byte 8 32) :type 'sse-condition-code))
1110 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-cmp 48
1112 '(:name " " cc :tab reg ", " reg/mem))
1113 (prefix :field (byte 8 0))
1114 (rex :field (byte 4 12) :value #b0100)
1115 (wrxb :field (byte 4 8) :type 'wrxb)
1116 (x0f :field (byte 8 16) :value #x0f)
1117 (op :field (byte 8 24))
1118 (reg/mem :fields (list (byte 2 38) (byte 3 32))
1120 (reg :field (byte 3 35) :type 'xmmreg)
1121 (cc :field (byte 8 40) :type 'sse-condition-code))
1123 ;;; XMM instructions with 8 bit immediate data
1125 (sb!disassem:define-instruction-format (xmm-xmm/mem-imm 24
1128 :tab reg ", " reg/mem ", " imm))
1129 (x0f :field (byte 8 0) :value #x0f)
1130 (op :field (byte 8 8))
1131 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1133 (reg :field (byte 3 19) :type 'xmmreg)
1134 (imm :type 'imm-byte))
1136 (sb!disassem:define-instruction-format (rex-xmm-xmm/mem-imm 32
1139 :tab reg ", " reg/mem ", " imm))
1140 (rex :field (byte 4 4) :value #b0100)
1141 (wrxb :field (byte 4 0) :type 'wrxb)
1142 (x0f :field (byte 8 8) :value #x0f)
1143 (op :field (byte 8 16))
1144 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1146 (reg :field (byte 3 27) :type 'xmmreg)
1147 (imm :type 'imm-byte))
1149 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-imm 32
1152 :tab reg ", " reg/mem ", " imm))
1153 (prefix :field (byte 8 0))
1154 (x0f :field (byte 8 8) :value #x0f)
1155 (op :field (byte 8 16))
1156 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1158 (reg :field (byte 3 27) :type 'xmmreg)
1159 (imm :type 'imm-byte))
1161 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-imm 40
1164 :tab reg ", " reg/mem ", " imm))
1165 (prefix :field (byte 8 0))
1166 (rex :field (byte 4 12) :value #b0100)
1167 (wrxb :field (byte 4 8) :type 'wrxb)
1168 (x0f :field (byte 8 16) :value #x0f)
1169 (op :field (byte 8 24))
1170 (reg/mem :fields (list (byte 2 38) (byte 3 32))
1172 (reg :field (byte 3 35) :type 'xmmreg)
1173 (imm :type 'imm-byte))
1175 (sb!disassem:define-instruction-format (string-op 8
1177 :default-printer '(:name width)))
1179 (sb!disassem:define-instruction-format (rex-string-op 16
1180 :include 'rex-simple
1181 :default-printer '(:name width)))
1183 (sb!disassem:define-instruction-format (short-cond-jump 16)
1184 (op :field (byte 4 4))
1185 (cc :field (byte 4 0) :type 'condition-code)
1186 (label :field (byte 8 8) :type 'displacement))
1188 (sb!disassem:define-instruction-format (short-jump 16
1189 :default-printer '(:name :tab label))
1190 (const :field (byte 4 4) :value #b1110)
1191 (op :field (byte 4 0))
1192 (label :field (byte 8 8) :type 'displacement))
1194 (sb!disassem:define-instruction-format (near-cond-jump 16)
1195 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
1196 (cc :field (byte 4 8) :type 'condition-code)
1197 ;; The disassembler currently doesn't let you have an instruction > 32 bits
1198 ;; long, so we fake it by using a prefilter to read the offset.
1199 (label :type 'displacement
1200 :prefilter (lambda (value dstate)
1201 (declare (ignore value)) ; always nil anyway
1202 (sb!disassem:read-signed-suffix 32 dstate))))
1204 (sb!disassem:define-instruction-format (near-jump 8
1205 :default-printer '(:name :tab label))
1206 (op :field (byte 8 0))
1207 ;; The disassembler currently doesn't let you have an instruction > 32 bits
1208 ;; long, so we fake it by using a prefilter to read the address.
1209 (label :type 'displacement
1210 :prefilter (lambda (value dstate)
1211 (declare (ignore value)) ; always nil anyway
1212 (sb!disassem:read-signed-suffix 32 dstate))))
1215 (sb!disassem:define-instruction-format (cond-set 24
1216 :default-printer '('set cc :tab reg/mem))
1217 (prefix :field (byte 8 0) :value #b00001111)
1218 (op :field (byte 4 12) :value #b1001)
1219 (cc :field (byte 4 8) :type 'condition-code)
1220 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1221 :type 'sized-byte-reg/mem)
1222 (reg :field (byte 3 19) :value #b000))
1224 (sb!disassem:define-instruction-format (cond-move 24
1226 '('cmov cc :tab reg ", " reg/mem))
1227 (prefix :field (byte 8 0) :value #b00001111)
1228 (op :field (byte 4 12) :value #b0100)
1229 (cc :field (byte 4 8) :type 'condition-code)
1230 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1232 (reg :field (byte 3 19) :type 'reg))
1234 (sb!disassem:define-instruction-format (rex-cond-move 32
1236 '('cmov cc :tab reg ", " reg/mem))
1237 (rex :field (byte 4 4) :value #b0100)
1238 (wrxb :field (byte 4 0) :type 'wrxb)
1239 (prefix :field (byte 8 8) :value #b00001111)
1240 (op :field (byte 4 20) :value #b0100)
1241 (cc :field (byte 4 16) :type 'condition-code)
1242 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1244 (reg :field (byte 3 27) :type 'reg))
1246 (sb!disassem:define-instruction-format (enter-format 32
1247 :default-printer '(:name
1249 (:unless (:constant 0)
1251 (op :field (byte 8 0))
1252 (disp :field (byte 16 8))
1253 (level :field (byte 8 24)))
1255 ;;; Single byte instruction with an immediate byte argument.
1256 (sb!disassem:define-instruction-format (byte-imm 16
1257 :default-printer '(:name :tab code))
1258 (op :field (byte 8 0))
1259 (code :field (byte 8 8)))
1261 ;;; Two byte instruction with an immediate byte argument.
1263 (sb!disassem:define-instruction-format (word-imm 24
1264 :default-printer '(:name :tab code))
1265 (op :field (byte 16 0))
1266 (code :field (byte 8 16)))
1269 ;;;; primitive emitters
1271 (define-bitfield-emitter emit-word 16
1274 (define-bitfield-emitter emit-dword 32
1277 ;;; Most uses of dwords are as displacements or as immediate values in
1278 ;;; 64-bit operations. In these cases they are sign-extended to 64 bits.
1279 ;;; EMIT-DWORD is unsuitable there because it accepts values of type
1280 ;;; (OR (SIGNED-BYTE 32) (UNSIGNED-BYTE 32)), so we provide a more
1281 ;;; restricted emitter here.
1282 (defun emit-signed-dword (segment value)
1283 (declare (type segment segment)
1284 (type (signed-byte 32) value))
1285 (declare (inline emit-dword))
1286 (emit-dword segment value))
1288 (define-bitfield-emitter emit-qword 64
1291 (define-bitfield-emitter emit-byte-with-reg 8
1292 (byte 5 3) (byte 3 0))
1294 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
1295 (byte 2 6) (byte 3 3) (byte 3 0))
1297 (define-bitfield-emitter emit-sib-byte 8
1298 (byte 2 6) (byte 3 3) (byte 3 0))
1300 (define-bitfield-emitter emit-rex-byte 8
1301 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1307 (defun emit-absolute-fixup (segment fixup &optional quad-p)
1308 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
1309 (let ((offset (fixup-offset fixup)))
1310 (if (label-p offset)
1311 (emit-back-patch segment
1313 (lambda (segment posn)
1314 (declare (ignore posn))
1315 (let ((val (- (+ (component-header-length)
1316 (or (label-position offset)
1318 other-pointer-lowtag)))
1320 (emit-qword segment val)
1321 (emit-signed-dword segment val)))))
1323 (emit-qword segment (or offset 0))
1324 (emit-signed-dword segment (or offset 0))))))
1326 (defun emit-relative-fixup (segment fixup)
1327 (note-fixup segment :relative fixup)
1328 (emit-signed-dword segment (or (fixup-offset fixup) 0)))
1331 ;;;; the effective-address (ea) structure
1333 (defun reg-tn-encoding (tn)
1334 (declare (type tn tn))
1335 ;; ea only has space for three bits of register number: regs r8
1336 ;; and up are selected by a REX prefix byte which caller is responsible
1337 ;; for having emitted where necessary already
1338 (ecase (sb-name (sc-sb (tn-sc tn)))
1340 (let ((offset (mod (tn-offset tn) 16)))
1341 (logior (ash (logand offset 1) 2)
1344 (mod (tn-offset tn) 8))))
1346 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1348 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1349 ;; can't actually emit it on its own: caller also needs to emit REX
1351 (size nil :type (member :byte :word :dword :qword))
1352 (base nil :type (or tn null))
1353 (index nil :type (or tn null))
1354 (scale 1 :type (member 1 2 4 8))
1355 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1356 (def!method print-object ((ea ea) stream)
1357 (cond ((or *print-escape* *print-readably*)
1358 (print-unreadable-object (ea stream :type t)
1360 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1364 (let ((scale (ea-scale ea)))
1365 (if (= scale 1) nil scale))
1368 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1370 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1372 (write-string "+" stream)))
1374 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1375 (unless (= (ea-scale ea) 1)
1376 (format stream "*~A" (ea-scale ea)))
1377 (typecase (ea-disp ea)
1380 (format stream "~@D" (ea-disp ea)))
1382 (format stream "+~A" (ea-disp ea))))
1383 (write-char #\] stream))))
1385 (defun emit-constant-tn-rip (segment constant-tn reg)
1386 ;; AMD64 doesn't currently have a code object register to use as a
1387 ;; base register for constant access. Instead we use RIP-relative
1388 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1389 ;; is passed to the backpatch callback. In addition we need the offset
1390 ;; from the start of the function header to the slot in the CODE-HEADER
1391 ;; that stores the constant. Since we don't know where the code header
1392 ;; starts, instead count backwards from the function header.
1393 (let* ((2comp (component-info *component-being-compiled*))
1394 (constants (ir2-component-constants 2comp))
1395 (len (length constants))
1396 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1397 ;; If there are an even amount of constants, there will be
1398 ;; an extra qword of padding before the function header, which
1399 ;; needs to be adjusted for. XXX: This will break if new slots
1400 ;; are added to the code header.
1401 (offset (* (- (+ len (if (evenp len)
1404 (tn-offset constant-tn))
1406 ;; RIP-relative addressing
1407 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1408 (emit-back-patch segment
1410 (lambda (segment posn)
1411 ;; The addressing is relative to end of instruction,
1412 ;; i.e. the end of this dword. Hence the + 4.
1413 (emit-signed-dword segment
1414 (+ 4 (- (+ offset posn)))))))
1417 (defun emit-label-rip (segment fixup reg)
1418 (let ((label (fixup-offset fixup)))
1419 ;; RIP-relative addressing
1420 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1421 (emit-back-patch segment
1423 (lambda (segment posn)
1424 (emit-signed-dword segment (- (label-position label)
1428 (defun emit-ea (segment thing reg &optional allow-constants)
1431 ;; this would be eleganter if we had a function that would create
1433 (ecase (sb-name (sc-sb (tn-sc thing)))
1434 ((registers float-registers)
1435 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1437 ;; Convert stack tns into an index off RBP.
1438 (let ((disp (frame-byte-offset (tn-offset thing))))
1439 (cond ((<= -128 disp 127)
1440 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1441 (emit-byte segment disp))
1443 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1444 (emit-signed-dword segment disp)))))
1446 (unless allow-constants
1449 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1450 (emit-constant-tn-rip segment thing reg))))
1452 (let* ((base (ea-base thing))
1453 (index (ea-index thing))
1454 (scale (ea-scale thing))
1455 (disp (ea-disp thing))
1456 (mod (cond ((or (null base)
1458 (not (= (reg-tn-encoding base) #b101))))
1460 ((and (fixnump disp) (<= -128 disp 127))
1464 (r/m (cond (index #b100)
1466 (t (reg-tn-encoding base)))))
1467 (when (and (fixup-p disp)
1468 (label-p (fixup-offset disp)))
1471 (return-from emit-ea (emit-ea segment disp reg allow-constants)))
1472 (when (and (= mod 0) (= r/m #b101))
1473 ;; this is rip-relative in amd64, so we'll use a sib instead
1474 (setf r/m #b100 scale 1))
1475 (emit-mod-reg-r/m-byte segment mod reg r/m)
1477 (let ((ss (1- (integer-length scale)))
1478 (index (if (null index)
1480 (let ((index (reg-tn-encoding index)))
1482 (error "can't index off of ESP")
1484 (base (if (null base)
1486 (reg-tn-encoding base))))
1487 (emit-sib-byte segment ss index base)))
1489 (emit-byte segment disp))
1490 ((or (= mod #b10) (null base))
1492 (emit-absolute-fixup segment disp)
1493 (emit-signed-dword segment disp))))))
1495 (typecase (fixup-offset thing)
1497 (emit-label-rip segment thing reg))
1499 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1500 (emit-sib-byte segment 0 #b100 #b101)
1501 (emit-absolute-fixup segment thing))))))
1503 (defun byte-reg-p (thing)
1505 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1506 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1509 (defun byte-ea-p (thing)
1511 (ea (eq (ea-size thing) :byte))
1513 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1516 (defun word-reg-p (thing)
1518 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1519 (member (sc-name (tn-sc thing)) *word-sc-names*)
1522 (defun word-ea-p (thing)
1524 (ea (eq (ea-size thing) :word))
1525 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1528 (defun dword-reg-p (thing)
1530 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1531 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1534 (defun dword-ea-p (thing)
1536 (ea (eq (ea-size thing) :dword))
1538 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1541 (defun qword-reg-p (thing)
1543 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1544 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1547 (defun qword-ea-p (thing)
1549 (ea (eq (ea-size thing) :qword))
1551 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1554 ;;; Return true if THING is a general-purpose register TN.
1555 (defun register-p (thing)
1557 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1559 (defun accumulator-p (thing)
1560 (and (register-p thing)
1561 (= (tn-offset thing) 0)))
1563 ;;; Return true if THING is an XMM register TN.
1564 (defun xmm-register-p (thing)
1566 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1571 (def!constant +operand-size-prefix-byte+ #b01100110)
1573 (defun maybe-emit-operand-size-prefix (segment size)
1574 (unless (or (eq size :byte)
1575 (eq size :qword) ; REX prefix handles this
1576 (eq size +default-operand-size+))
1577 (emit-byte segment +operand-size-prefix-byte+)))
1579 ;;; A REX prefix must be emitted if at least one of the following
1580 ;;; conditions is true:
1581 ;; 1. The operand size is :QWORD and the default operand size of the
1582 ;; instruction is not :QWORD.
1583 ;;; 2. The instruction references an extended register.
1584 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1587 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1588 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1589 ;;; this should not happen, for example because the instruction's
1590 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1591 ;;; registers the encodings of which are extended with the REX.R, REX.X
1592 ;;; and REX.B bit, respectively. To determine whether one of the byte
1593 ;;; registers is used that can only be accessed using a REX prefix, we
1594 ;;; need only to test R and B, because X is only used for the index
1595 ;;; register of an effective address and therefore never byte-sized.
1596 ;;; For R we can avoid to calculate the size of the TN because it is
1597 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1598 ;;; B can be address-sized (if it is the base register of an effective
1599 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1600 ;;; registers) or of some different size (in the instructions that
1601 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1602 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1603 ;;; between general-purpose and floating point registers for this cause
1604 ;;; because only general-purpose registers can be byte-sized at all.
1605 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1606 (declare (type (member nil :byte :word :dword :qword :do-not-set)
1608 (type (or null tn) r x b))
1610 (if (and r (> (tn-offset r)
1611 ;; offset of r8 is 16, offset of xmm8 is 8
1612 (if (eq (sb-name (sc-sb (tn-sc r)))
1619 ;; Assuming R is a TN describing a general-purpose
1620 ;; register, return true if it references register
1622 (<= 8 (tn-offset r) 15)))
1623 (let ((rex-w (if (eq operand-size :qword) 1 0))
1627 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1629 (eq operand-size :byte)
1632 (eq (operand-size b) :byte)
1634 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1636 ;;; Emit a REX prefix if necessary. The operand size is determined from
1637 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1638 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1639 ;;; pass its index and base registers, if it is a register TN, we pass
1641 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1642 ;;; be treated specially here: If THING is a stack TN, neither it nor
1643 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1644 ;;; works correctly because stack references always use RBP as the base
1645 ;;; register and never use an index register so no extended registers
1646 ;;; need to be accessed. Fixups are assembled using an addressing mode
1647 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1648 ;;; not reference an extended register. The displacement-only addressing
1649 ;;; mode requires that REX.X is 0, which is ensured here.
1650 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1651 (declare (type (or ea tn fixup) thing)
1652 (type (or null tn) reg)
1653 (type (member nil :byte :word :dword :qword :do-not-set)
1655 (let ((ea-p (ea-p thing)))
1656 (maybe-emit-rex-prefix segment
1657 (or operand-size (operand-size thing))
1659 (and ea-p (ea-index thing))
1660 (cond (ea-p (ea-base thing))
1662 (member (sb-name (sc-sb (tn-sc thing)))
1663 '(float-registers registers)))
1667 (defun operand-size (thing)
1670 ;; FIXME: might as well be COND instead of having to use #. readmacro
1671 ;; to hack up the code
1672 (case (sc-name (tn-sc thing))
1681 ;; added by jrd: float-registers is a separate size (?)
1682 ;; The only place in the code where we are called with THING
1683 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1684 ;; checks whether THING is a byte register. Thus our result in
1685 ;; these cases could as well be :dword and :qword. I leave it as
1686 ;; :float and :double which is more likely to trigger an aver
1687 ;; instead of silently doing the wrong thing in case this
1688 ;; situation should change. Lutz Euler, 2005-10-23.
1691 (#.*double-sc-names*
1693 (#.*complex-sc-names*
1696 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1700 ;; GNA. Guess who spelt "flavor" correctly first time round?
1701 ;; There's a strong argument in my mind to change all uses of
1702 ;; "flavor" to "kind": and similarly with some misguided uses of
1703 ;; "type" here and there. -- CSR, 2005-01-06.
1704 (case (fixup-flavor thing)
1705 ((:foreign-dataref) :qword)))
1709 (defun matching-operand-size (dst src)
1710 (let ((dst-size (operand-size dst))
1711 (src-size (operand-size src)))
1714 (if (eq dst-size src-size)
1716 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1717 dst dst-size src src-size))
1721 (error "can't tell the size of either ~S or ~S" dst src)))))
1723 ;;; Except in a very few cases (MOV instructions A1, A3 and B8 - BF)
1724 ;;; we expect dword data bytes even when 64 bit work is being done.
1725 ;;; But A1 and A3 are currently unused and B8 - BF use EMIT-QWORD
1726 ;;; directly, so we emit all quad constants as dwords, additionally
1727 ;;; making sure that they survive the sign-extension to 64 bits
1729 (defun emit-sized-immediate (segment size value)
1732 (emit-byte segment value))
1734 (emit-word segment value))
1736 (emit-dword segment value))
1738 (emit-signed-dword segment value))))
1740 ;;;; general data transfer
1742 ;;; This is the part of the MOV instruction emitter that does moving
1743 ;;; of an immediate value into a qword register. We go to some length
1744 ;;; to achieve the shortest possible encoding.
1745 (defun emit-immediate-move-to-qword-register (segment dst src)
1746 (declare (type integer src))
1747 (cond ((typep src '(unsigned-byte 32))
1748 ;; We use the B8 - BF encoding with an operand size of 32 bits
1749 ;; here and let the implicit zero-extension fill the upper half
1750 ;; of the 64-bit destination register. Instruction size: five
1751 ;; or six bytes. (A REX prefix will be emitted only if the
1752 ;; destination is an extended register.)
1753 (maybe-emit-rex-prefix segment :dword nil nil dst)
1754 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1755 (emit-dword segment src))
1757 (maybe-emit-rex-prefix segment :qword nil nil dst)
1758 (cond ((typep src '(signed-byte 32))
1759 ;; Use the C7 encoding that takes a 32-bit immediate and
1760 ;; sign-extends it to 64 bits. Instruction size: seven
1762 (emit-byte segment #b11000111)
1763 (emit-mod-reg-r/m-byte segment #b11 #b000
1764 (reg-tn-encoding dst))
1765 (emit-signed-dword segment src))
1766 ((<= (- (expt 2 64) (expt 2 31))
1769 ;; This triggers on positive integers of 64 bits length
1770 ;; with the most significant 33 bits being 1. We use the
1771 ;; same encoding as in the previous clause.
1772 (emit-byte segment #b11000111)
1773 (emit-mod-reg-r/m-byte segment #b11 #b000
1774 (reg-tn-encoding dst))
1775 (emit-signed-dword segment (- src (expt 2 64))))
1777 ;; We need a full 64-bit immediate. Instruction size:
1779 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1780 (emit-qword segment src))))))
1782 (define-instruction mov (segment dst src)
1783 ;; immediate to register
1784 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1785 '(:name :tab reg ", " imm))
1786 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1787 '(:name :tab reg ", " imm))
1788 ;; absolute mem to/from accumulator
1789 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1790 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1791 ;; register to/from register/memory
1792 (:printer reg-reg/mem-dir ((op #b100010)))
1793 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1794 (:printer x66-reg-reg/mem-dir ((op #b100010)))
1795 (:printer x66-rex-reg-reg/mem-dir ((op #b100010)))
1796 ;; immediate to register/memory
1797 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1798 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1801 (let ((size (matching-operand-size dst src)))
1802 (maybe-emit-operand-size-prefix segment size)
1803 (cond ((register-p dst)
1804 (cond ((integerp src)
1805 (cond ((eq size :qword)
1806 (emit-immediate-move-to-qword-register segment
1809 (maybe-emit-rex-prefix segment size nil nil dst)
1810 (emit-byte-with-reg segment
1814 (reg-tn-encoding dst))
1815 (emit-sized-immediate segment size src))))
1817 (maybe-emit-rex-for-ea segment src dst)
1822 (emit-ea segment src (reg-tn-encoding dst) t))))
1824 ;; C7 only deals with 32 bit immediates even if the
1825 ;; destination is a 64-bit location. The value is
1826 ;; sign-extended in this case.
1827 (maybe-emit-rex-for-ea segment dst nil)
1828 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
1829 (emit-ea segment dst #b000)
1830 (emit-sized-immediate segment size src))
1832 (maybe-emit-rex-for-ea segment dst src)
1833 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1834 (emit-ea segment dst (reg-tn-encoding src)))
1836 ;; Generally we can't MOV a fixupped value into an EA, since
1837 ;; MOV on non-registers can only take a 32-bit immediate arg.
1838 ;; Make an exception for :FOREIGN fixups (pretty much just
1839 ;; the runtime asm, since other foreign calls go through the
1840 ;; the linkage table) and for linkage table references, since
1841 ;; these should always end up in low memory.
1842 (aver (or (eq (fixup-flavor src) :foreign)
1843 (eq (fixup-flavor src) :foreign-dataref)
1844 (eq (ea-size dst) :dword)))
1845 (maybe-emit-rex-for-ea segment dst nil)
1846 (emit-byte segment #b11000111)
1847 (emit-ea segment dst #b000)
1848 (emit-absolute-fixup segment src))
1850 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1852 (defun emit-move-with-extension (segment dst src signed-p)
1853 (aver (register-p dst))
1854 (let ((dst-size (operand-size dst))
1855 (src-size (operand-size src))
1856 (opcode (if signed-p #b10111110 #b10110110)))
1859 (aver (eq src-size :byte))
1860 (maybe-emit-operand-size-prefix segment :word)
1861 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1862 (maybe-emit-rex-for-ea segment src dst :operand-size :word)
1863 (emit-byte segment #b00001111)
1864 (emit-byte segment opcode)
1865 (emit-ea segment src (reg-tn-encoding dst)))
1869 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1870 (emit-byte segment #b00001111)
1871 (emit-byte segment opcode)
1872 (emit-ea segment src (reg-tn-encoding dst)))
1874 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1875 (emit-byte segment #b00001111)
1876 (emit-byte segment (logior opcode 1))
1877 (emit-ea segment src (reg-tn-encoding dst)))
1879 (aver (eq dst-size :qword))
1880 ;; dst is in reg, src is in modrm
1881 (let ((ea-p (ea-p src)))
1882 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1883 (and ea-p (ea-index src))
1884 (cond (ea-p (ea-base src))
1887 (emit-byte segment (if signed-p #x63 #x8b)) ;movsxd or straight mov
1888 ;;(emit-byte segment opcode)
1889 (emit-ea segment src (reg-tn-encoding dst)))))))))
1891 (define-instruction movsx (segment dst src)
1892 (:printer ext-reg-reg/mem-no-width
1893 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1894 (:printer rex-ext-reg-reg/mem-no-width
1895 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1896 (:printer ext-reg-reg/mem-no-width
1897 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1898 (:printer rex-ext-reg-reg/mem-no-width
1899 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1900 (:emitter (emit-move-with-extension segment dst src :signed)))
1902 (define-instruction movzx (segment dst src)
1903 (:printer ext-reg-reg/mem-no-width
1904 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1905 (:printer rex-ext-reg-reg/mem-no-width
1906 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1907 (:printer ext-reg-reg/mem-no-width
1908 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1909 (:printer rex-ext-reg-reg/mem-no-width
1910 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1911 (:emitter (emit-move-with-extension segment dst src nil)))
1913 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1914 ;;; sign-extends the dword source into the qword destination register.
1915 ;;; If the operand size is :dword the instruction zero-extends the dword
1916 ;;; source into the qword destination register, i.e. it does the same as
1917 ;;; a dword MOV into a register.
1918 (define-instruction movsxd (segment dst src)
1919 (:printer reg-reg/mem ((op #b0110001) (width 1)
1920 (reg/mem nil :type 'sized-dword-reg/mem)))
1921 (:printer rex-reg-reg/mem ((op #b0110001) (width 1)
1922 (reg/mem nil :type 'sized-dword-reg/mem)))
1923 (:emitter (emit-move-with-extension segment dst src :signed)))
1925 ;;; this is not a real amd64 instruction, of course
1926 (define-instruction movzxd (segment dst src)
1927 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1928 (:emitter (emit-move-with-extension segment dst src nil)))
1930 (define-instruction push (segment src)
1932 (:printer reg-no-width-default-qword ((op #b01010)))
1933 (:printer rex-reg-no-width-default-qword ((op #b01010)))
1935 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1936 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b110))))
1938 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1940 (:printer byte ((op #b01101000)
1941 (imm nil :type 'signed-imm-data-default-qword))
1943 ;; ### segment registers?
1946 (cond ((integerp src)
1947 (cond ((<= -128 src 127)
1948 (emit-byte segment #b01101010)
1949 (emit-byte segment src))
1951 ;; A REX-prefix is not needed because the operand size
1952 ;; defaults to 64 bits. The size of the immediate is 32
1953 ;; bits and it is sign-extended.
1954 (emit-byte segment #b01101000)
1955 (emit-signed-dword segment src))))
1957 (let ((size (operand-size src)))
1958 (aver (or (eq size :qword) (eq size :word)))
1959 (maybe-emit-operand-size-prefix segment size)
1960 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1961 (cond ((register-p src)
1962 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1964 (emit-byte segment #b11111111)
1965 (emit-ea segment src #b110 t))))))))
1967 (define-instruction pop (segment dst)
1968 (:printer reg-no-width-default-qword ((op #b01011)))
1969 (:printer rex-reg-no-width-default-qword ((op #b01011)))
1970 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1971 (:printer rex-reg/mem-default-qword ((op '(#b10001111 #b000))))
1973 (let ((size (operand-size dst)))
1974 (aver (or (eq size :qword) (eq size :word)))
1975 (maybe-emit-operand-size-prefix segment size)
1976 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1977 (cond ((register-p dst)
1978 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1980 (emit-byte segment #b10001111)
1981 (emit-ea segment dst #b000))))))
1983 (define-instruction xchg (segment operand1 operand2)
1984 ;; Register with accumulator.
1985 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1986 ;; Register/Memory with Register.
1987 (:printer reg-reg/mem ((op #b1000011)))
1988 (:printer rex-reg-reg/mem ((op #b1000011)))
1990 (let ((size (matching-operand-size operand1 operand2)))
1991 (maybe-emit-operand-size-prefix segment size)
1992 (labels ((xchg-acc-with-something (acc something)
1993 (if (and (not (eq size :byte)) (register-p something))
1995 (maybe-emit-rex-for-ea segment acc something)
1996 (emit-byte-with-reg segment
1998 (reg-tn-encoding something)))
1999 (xchg-reg-with-something acc something)))
2000 (xchg-reg-with-something (reg something)
2001 (maybe-emit-rex-for-ea segment something reg)
2002 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
2003 (emit-ea segment something (reg-tn-encoding reg))))
2004 (cond ((accumulator-p operand1)
2005 (xchg-acc-with-something operand1 operand2))
2006 ((accumulator-p operand2)
2007 (xchg-acc-with-something operand2 operand1))
2008 ((register-p operand1)
2009 (xchg-reg-with-something operand1 operand2))
2010 ((register-p operand2)
2011 (xchg-reg-with-something operand2 operand1))
2013 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
2015 (define-instruction lea (segment dst src)
2016 (:printer rex-reg-reg/mem ((op #b1000110)))
2017 (:printer reg-reg/mem ((op #b1000110) (width 1)))
2019 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
2020 (maybe-emit-rex-for-ea segment src dst
2021 :operand-size :qword)
2022 (emit-byte segment #b10001101)
2023 (emit-ea segment src (reg-tn-encoding dst))))
2025 (define-instruction cmpxchg (segment dst src &optional prefix)
2026 ;; Register/Memory with Register.
2027 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
2029 (aver (register-p src))
2030 (emit-prefix segment prefix)
2031 (let ((size (matching-operand-size src dst)))
2032 (maybe-emit-operand-size-prefix segment size)
2033 (maybe-emit-rex-for-ea segment dst src)
2034 (emit-byte segment #b00001111)
2035 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
2036 (emit-ea segment dst (reg-tn-encoding src)))))
2039 ;;;; flag control instructions
2041 ;;; CLC -- Clear Carry Flag.
2042 (define-instruction clc (segment)
2043 (:printer byte ((op #b11111000)))
2045 (emit-byte segment #b11111000)))
2047 ;;; CLD -- Clear Direction Flag.
2048 (define-instruction cld (segment)
2049 (:printer byte ((op #b11111100)))
2051 (emit-byte segment #b11111100)))
2053 ;;; CLI -- Clear Iterrupt Enable Flag.
2054 (define-instruction cli (segment)
2055 (:printer byte ((op #b11111010)))
2057 (emit-byte segment #b11111010)))
2059 ;;; CMC -- Complement Carry Flag.
2060 (define-instruction cmc (segment)
2061 (:printer byte ((op #b11110101)))
2063 (emit-byte segment #b11110101)))
2065 ;;; LAHF -- Load AH into flags.
2066 (define-instruction lahf (segment)
2067 (:printer byte ((op #b10011111)))
2069 (emit-byte segment #b10011111)))
2071 ;;; POPF -- Pop flags.
2072 (define-instruction popf (segment)
2073 (:printer byte ((op #b10011101)))
2075 (emit-byte segment #b10011101)))
2077 ;;; PUSHF -- push flags.
2078 (define-instruction pushf (segment)
2079 (:printer byte ((op #b10011100)))
2081 (emit-byte segment #b10011100)))
2083 ;;; SAHF -- Store AH into flags.
2084 (define-instruction sahf (segment)
2085 (:printer byte ((op #b10011110)))
2087 (emit-byte segment #b10011110)))
2089 ;;; STC -- Set Carry Flag.
2090 (define-instruction stc (segment)
2091 (:printer byte ((op #b11111001)))
2093 (emit-byte segment #b11111001)))
2095 ;;; STD -- Set Direction Flag.
2096 (define-instruction std (segment)
2097 (:printer byte ((op #b11111101)))
2099 (emit-byte segment #b11111101)))
2101 ;;; STI -- Set Interrupt Enable Flag.
2102 (define-instruction sti (segment)
2103 (:printer byte ((op #b11111011)))
2105 (emit-byte segment #b11111011)))
2109 (defun emit-random-arith-inst (name segment dst src opcode
2110 &optional allow-constants)
2111 (let ((size (matching-operand-size dst src)))
2112 (maybe-emit-operand-size-prefix segment size)
2115 (cond ((and (not (eq size :byte)) (<= -128 src 127))
2116 (maybe-emit-rex-for-ea segment dst nil)
2117 (emit-byte segment #b10000011)
2118 (emit-ea segment dst opcode allow-constants)
2119 (emit-byte segment src))
2120 ((accumulator-p dst)
2121 (maybe-emit-rex-for-ea segment dst nil)
2128 (emit-sized-immediate segment size src))
2130 (maybe-emit-rex-for-ea segment dst nil)
2131 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
2132 (emit-ea segment dst opcode allow-constants)
2133 (emit-sized-immediate segment size src))))
2135 (maybe-emit-rex-for-ea segment dst src)
2139 (if (eq size :byte) #b00000000 #b00000001)))
2140 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
2142 (maybe-emit-rex-for-ea segment src dst)
2146 (if (eq size :byte) #b00000010 #b00000011)))
2147 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
2149 (error "bogus operands to ~A" name)))))
2151 (eval-when (:compile-toplevel :execute)
2152 (defun arith-inst-printer-list (subop)
2153 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
2154 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
2155 (reg/mem-imm ((op (#b1000000 ,subop))))
2156 (rex-reg/mem-imm ((op (#b1000000 ,subop))))
2157 ;; The redundant encoding #x82 is invalid in 64-bit mode,
2158 ;; therefore we force WIDTH to 1.
2159 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
2160 (imm nil :type signed-imm-byte)))
2161 (rex-reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
2162 (imm nil :type signed-imm-byte)))
2163 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
2164 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
2167 (define-instruction add (segment dst src &optional prefix)
2168 (:printer-list (arith-inst-printer-list #b000))
2170 (emit-prefix segment prefix)
2171 (emit-random-arith-inst "ADD" segment dst src #b000)))
2173 (define-instruction adc (segment dst src)
2174 (:printer-list (arith-inst-printer-list #b010))
2175 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
2177 (define-instruction sub (segment dst src)
2178 (:printer-list (arith-inst-printer-list #b101))
2179 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
2181 (define-instruction sbb (segment dst src)
2182 (:printer-list (arith-inst-printer-list #b011))
2183 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
2185 (define-instruction cmp (segment dst src)
2186 (:printer-list (arith-inst-printer-list #b111))
2187 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
2189 ;;; The one-byte encodings for INC and DEC are used as REX prefixes
2190 ;;; in 64-bit mode so we always use the two-byte form.
2191 (define-instruction inc (segment dst)
2192 (:printer reg/mem ((op '(#b1111111 #b000))))
2193 (:printer rex-reg/mem ((op '(#b1111111 #b000))))
2195 (let ((size (operand-size dst)))
2196 (maybe-emit-operand-size-prefix segment size)
2197 (maybe-emit-rex-for-ea segment dst nil)
2198 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2199 (emit-ea segment dst #b000))))
2201 (define-instruction dec (segment dst)
2202 (:printer reg/mem ((op '(#b1111111 #b001))))
2203 (:printer rex-reg/mem ((op '(#b1111111 #b001))))
2205 (let ((size (operand-size dst)))
2206 (maybe-emit-operand-size-prefix segment size)
2207 (maybe-emit-rex-for-ea segment dst nil)
2208 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2209 (emit-ea segment dst #b001))))
2211 (define-instruction neg (segment dst)
2212 (:printer reg/mem ((op '(#b1111011 #b011))))
2213 (:printer rex-reg/mem ((op '(#b1111011 #b011))))
2215 (let ((size (operand-size dst)))
2216 (maybe-emit-operand-size-prefix segment size)
2217 (maybe-emit-rex-for-ea segment dst nil)
2218 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2219 (emit-ea segment dst #b011))))
2221 (define-instruction mul (segment dst src)
2222 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
2223 (:printer rex-accum-reg/mem ((op '(#b1111011 #b100))))
2225 (let ((size (matching-operand-size dst src)))
2226 (aver (accumulator-p dst))
2227 (maybe-emit-operand-size-prefix segment size)
2228 (maybe-emit-rex-for-ea segment src nil)
2229 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2230 (emit-ea segment src #b100))))
2232 (define-instruction imul (segment dst &optional src1 src2)
2233 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
2234 (:printer rex-accum-reg/mem ((op '(#b1111011 #b101))))
2235 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
2236 (:printer rex-ext-reg-reg/mem-no-width ((op #b10101111)))
2237 (:printer reg-reg/mem ((op #b0110100) (width 1)
2238 (imm nil :type 'signed-imm-data))
2239 '(:name :tab reg ", " reg/mem ", " imm))
2240 (:printer rex-reg-reg/mem ((op #b0110100) (width 1)
2241 (imm nil :type 'signed-imm-data))
2242 '(:name :tab reg ", " reg/mem ", " imm))
2243 (:printer reg-reg/mem ((op #b0110101) (width 1)
2244 (imm nil :type 'signed-imm-byte))
2245 '(:name :tab reg ", " reg/mem ", " imm))
2246 (:printer rex-reg-reg/mem ((op #b0110101) (width 1)
2247 (imm nil :type 'signed-imm-byte))
2248 '(:name :tab reg ", " reg/mem ", " imm))
2250 (flet ((r/m-with-immed-to-reg (reg r/m immed)
2251 (let* ((size (matching-operand-size reg r/m))
2252 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
2253 (maybe-emit-operand-size-prefix segment size)
2254 (maybe-emit-rex-for-ea segment r/m reg)
2255 (emit-byte segment (if sx #b01101011 #b01101001))
2256 (emit-ea segment r/m (reg-tn-encoding reg))
2258 (emit-byte segment immed)
2259 (emit-sized-immediate segment size immed)))))
2261 (r/m-with-immed-to-reg dst src1 src2))
2264 (r/m-with-immed-to-reg dst dst src1)
2265 (let ((size (matching-operand-size dst src1)))
2266 (maybe-emit-operand-size-prefix segment size)
2267 (maybe-emit-rex-for-ea segment src1 dst)
2268 (emit-byte segment #b00001111)
2269 (emit-byte segment #b10101111)
2270 (emit-ea segment src1 (reg-tn-encoding dst)))))
2272 (let ((size (operand-size dst)))
2273 (maybe-emit-operand-size-prefix segment size)
2274 (maybe-emit-rex-for-ea segment dst nil)
2275 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2276 (emit-ea segment dst #b101)))))))
2278 (define-instruction div (segment dst src)
2279 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
2280 (:printer rex-accum-reg/mem ((op '(#b1111011 #b110))))
2282 (let ((size (matching-operand-size dst src)))
2283 (aver (accumulator-p dst))
2284 (maybe-emit-operand-size-prefix segment size)
2285 (maybe-emit-rex-for-ea segment src nil)
2286 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2287 (emit-ea segment src #b110))))
2289 (define-instruction idiv (segment dst src)
2290 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
2291 (:printer rex-accum-reg/mem ((op '(#b1111011 #b111))))
2293 (let ((size (matching-operand-size dst src)))
2294 (aver (accumulator-p dst))
2295 (maybe-emit-operand-size-prefix segment size)
2296 (maybe-emit-rex-for-ea segment src nil)
2297 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2298 (emit-ea segment src #b111))))
2300 (define-instruction bswap (segment dst)
2301 (:printer ext-reg-no-width ((op #b11001)))
2303 (let ((size (operand-size dst)))
2304 (maybe-emit-rex-prefix segment size nil nil dst)
2305 (emit-byte segment #x0f)
2306 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
2308 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2309 (define-instruction cbw (segment)
2310 (:printer x66-byte ((op #b10011000)))
2312 (maybe-emit-operand-size-prefix segment :word)
2313 (emit-byte segment #b10011000)))
2315 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2316 (define-instruction cwde (segment)
2317 (:printer byte ((op #b10011000)))
2319 (maybe-emit-operand-size-prefix segment :dword)
2320 (emit-byte segment #b10011000)))
2322 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2323 (define-instruction cdqe (segment)
2324 (:printer rex-byte ((op #b10011000)))
2326 (maybe-emit-rex-prefix segment :qword nil nil nil)
2327 (emit-byte segment #b10011000)))
2329 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2330 (define-instruction cwd (segment)
2331 (:printer x66-byte ((op #b10011001)))
2333 (maybe-emit-operand-size-prefix segment :word)
2334 (emit-byte segment #b10011001)))
2336 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2337 (define-instruction cdq (segment)
2338 (:printer byte ((op #b10011001)))
2340 (maybe-emit-operand-size-prefix segment :dword)
2341 (emit-byte segment #b10011001)))
2343 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2344 (define-instruction cqo (segment)
2345 (:printer rex-byte ((op #b10011001)))
2347 (maybe-emit-rex-prefix segment :qword nil nil nil)
2348 (emit-byte segment #b10011001)))
2350 (define-instruction xadd (segment dst src &optional prefix)
2351 ;; Register/Memory with Register.
2352 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
2354 (aver (register-p src))
2355 (emit-prefix segment prefix)
2356 (let ((size (matching-operand-size src dst)))
2357 (maybe-emit-operand-size-prefix segment size)
2358 (maybe-emit-rex-for-ea segment dst src)
2359 (emit-byte segment #b00001111)
2360 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2361 (emit-ea segment dst (reg-tn-encoding src)))))
2366 (defun emit-shift-inst (segment dst amount opcode)
2367 (let ((size (operand-size dst)))
2368 (maybe-emit-operand-size-prefix segment size)
2369 (multiple-value-bind (major-opcode immed)
2371 (:cl (values #b11010010 nil))
2372 (1 (values #b11010000 nil))
2373 (t (values #b11000000 t)))
2374 (maybe-emit-rex-for-ea segment dst nil)
2376 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2377 (emit-ea segment dst opcode)
2379 (emit-byte segment amount)))))
2381 (eval-when (:compile-toplevel :execute)
2382 (defun shift-inst-printer-list (subop)
2383 `((reg/mem ((op (#b1101000 ,subop)))
2384 (:name :tab reg/mem ", 1"))
2385 (rex-reg/mem ((op (#b1101000 ,subop)))
2386 (:name :tab reg/mem ", 1"))
2387 (reg/mem ((op (#b1101001 ,subop)))
2388 (:name :tab reg/mem ", " 'cl))
2389 (rex-reg/mem ((op (#b1101001 ,subop)))
2390 (:name :tab reg/mem ", " 'cl))
2391 (reg/mem-imm ((op (#b1100000 ,subop))
2392 (imm nil :type imm-byte)))
2393 (rex-reg/mem-imm ((op (#b1100000 ,subop))
2394 (imm nil :type imm-byte))))))
2396 (define-instruction rol (segment dst amount)
2398 (shift-inst-printer-list #b000))
2400 (emit-shift-inst segment dst amount #b000)))
2402 (define-instruction ror (segment dst amount)
2404 (shift-inst-printer-list #b001))
2406 (emit-shift-inst segment dst amount #b001)))
2408 (define-instruction rcl (segment dst amount)
2410 (shift-inst-printer-list #b010))
2412 (emit-shift-inst segment dst amount #b010)))
2414 (define-instruction rcr (segment dst amount)
2416 (shift-inst-printer-list #b011))
2418 (emit-shift-inst segment dst amount #b011)))
2420 (define-instruction shl (segment dst amount)
2422 (shift-inst-printer-list #b100))
2424 (emit-shift-inst segment dst amount #b100)))
2426 (define-instruction shr (segment dst amount)
2428 (shift-inst-printer-list #b101))
2430 (emit-shift-inst segment dst amount #b101)))
2432 (define-instruction sar (segment dst amount)
2434 (shift-inst-printer-list #b111))
2436 (emit-shift-inst segment dst amount #b111)))
2438 (defun emit-double-shift (segment opcode dst src amt)
2439 (let ((size (matching-operand-size dst src)))
2440 (when (eq size :byte)
2441 (error "Double shifts can only be used with words."))
2442 (maybe-emit-operand-size-prefix segment size)
2443 (maybe-emit-rex-for-ea segment dst src)
2444 (emit-byte segment #b00001111)
2445 (emit-byte segment (dpb opcode (byte 1 3)
2446 (if (eq amt :cl) #b10100101 #b10100100)))
2447 (emit-ea segment dst (reg-tn-encoding src))
2448 (unless (eq amt :cl)
2449 (emit-byte segment amt))))
2451 (eval-when (:compile-toplevel :execute)
2452 (defun double-shift-inst-printer-list (op)
2454 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
2455 (imm nil :type signed-imm-byte)))
2456 (ext-reg-reg/mem ((op ,(logior op #b101)))
2457 (:name :tab reg/mem ", " 'cl)))))
2459 (define-instruction shld (segment dst src amt)
2460 (:declare (type (or (member :cl) (mod 32)) amt))
2461 (:printer-list (double-shift-inst-printer-list #b10100000))
2463 (emit-double-shift segment #b0 dst src amt)))
2465 (define-instruction shrd (segment dst src amt)
2466 (:declare (type (or (member :cl) (mod 32)) amt))
2467 (:printer-list (double-shift-inst-printer-list #b10101000))
2469 (emit-double-shift segment #b1 dst src amt)))
2471 (define-instruction and (segment dst src)
2473 (arith-inst-printer-list #b100))
2475 (emit-random-arith-inst "AND" segment dst src #b100)))
2477 (define-instruction test (segment this that)
2478 (:printer accum-imm ((op #b1010100)))
2479 (:printer rex-accum-imm ((op #b1010100)))
2480 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2481 (:printer rex-reg/mem-imm ((op '(#b1111011 #b000))))
2482 (:printer reg-reg/mem ((op #b1000010)))
2483 (:printer rex-reg-reg/mem ((op #b1000010)))
2485 (let ((size (matching-operand-size this that)))
2486 (maybe-emit-operand-size-prefix segment size)
2487 (flet ((test-immed-and-something (immed something)
2488 (cond ((accumulator-p something)
2489 (maybe-emit-rex-for-ea segment something nil)
2491 (if (eq size :byte) #b10101000 #b10101001))
2492 (emit-sized-immediate segment size immed))
2494 (maybe-emit-rex-for-ea segment something nil)
2496 (if (eq size :byte) #b11110110 #b11110111))
2497 (emit-ea segment something #b000)
2498 (emit-sized-immediate segment size immed))))
2499 (test-reg-and-something (reg something)
2500 (maybe-emit-rex-for-ea segment something reg)
2501 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2502 (emit-ea segment something (reg-tn-encoding reg))))
2503 (cond ((integerp that)
2504 (test-immed-and-something that this))
2506 (test-immed-and-something this that))
2508 (test-reg-and-something this that))
2510 (test-reg-and-something that this))
2512 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2514 (define-instruction or (segment dst src)
2516 (arith-inst-printer-list #b001))
2518 (emit-random-arith-inst "OR" segment dst src #b001)))
2520 (define-instruction xor (segment dst src)
2522 (arith-inst-printer-list #b110))
2524 (emit-random-arith-inst "XOR" segment dst src #b110)))
2526 (define-instruction not (segment dst)
2527 (:printer reg/mem ((op '(#b1111011 #b010))))
2528 (:printer rex-reg/mem ((op '(#b1111011 #b010))))
2530 (let ((size (operand-size dst)))
2531 (maybe-emit-operand-size-prefix segment size)
2532 (maybe-emit-rex-for-ea segment dst nil)
2533 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2534 (emit-ea segment dst #b010))))
2536 ;;;; string manipulation
2538 (define-instruction cmps (segment size)
2539 (:printer string-op ((op #b1010011)))
2540 (:printer rex-string-op ((op #b1010011)))
2542 (maybe-emit-operand-size-prefix segment size)
2543 (maybe-emit-rex-prefix segment size nil nil nil)
2544 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2546 (define-instruction ins (segment acc)
2547 (:printer string-op ((op #b0110110)))
2548 (:printer rex-string-op ((op #b0110110)))
2550 (let ((size (operand-size acc)))
2551 (aver (accumulator-p acc))
2552 (maybe-emit-operand-size-prefix segment size)
2553 (maybe-emit-rex-prefix segment size nil nil nil)
2554 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2556 (define-instruction lods (segment acc)
2557 (:printer string-op ((op #b1010110)))
2558 (:printer rex-string-op ((op #b1010110)))
2560 (let ((size (operand-size acc)))
2561 (aver (accumulator-p acc))
2562 (maybe-emit-operand-size-prefix segment size)
2563 (maybe-emit-rex-prefix segment size nil nil nil)
2564 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2566 (define-instruction movs (segment size)
2567 (:printer string-op ((op #b1010010)))
2568 (:printer rex-string-op ((op #b1010010)))
2570 (maybe-emit-operand-size-prefix segment size)
2571 (maybe-emit-rex-prefix segment size nil nil nil)
2572 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2574 (define-instruction outs (segment acc)
2575 (:printer string-op ((op #b0110111)))
2576 (:printer rex-string-op ((op #b0110111)))
2578 (let ((size (operand-size acc)))
2579 (aver (accumulator-p acc))
2580 (maybe-emit-operand-size-prefix segment size)
2581 (maybe-emit-rex-prefix segment size nil nil nil)
2582 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2584 (define-instruction scas (segment acc)
2585 (:printer string-op ((op #b1010111)))
2586 (:printer rex-string-op ((op #b1010111)))
2588 (let ((size (operand-size acc)))
2589 (aver (accumulator-p acc))
2590 (maybe-emit-operand-size-prefix segment size)
2591 (maybe-emit-rex-prefix segment size nil nil nil)
2592 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2594 (define-instruction stos (segment acc)
2595 (:printer string-op ((op #b1010101)))
2596 (:printer rex-string-op ((op #b1010101)))
2598 (let ((size (operand-size acc)))
2599 (aver (accumulator-p acc))
2600 (maybe-emit-operand-size-prefix segment size)
2601 (maybe-emit-rex-prefix segment size nil nil nil)
2602 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2604 (define-instruction xlat (segment)
2605 (:printer byte ((op #b11010111)))
2607 (emit-byte segment #b11010111)))
2609 (define-instruction rep (segment)
2611 (emit-byte segment #b11110011)))
2613 (define-instruction repe (segment)
2614 (:printer byte ((op #b11110011)))
2616 (emit-byte segment #b11110011)))
2618 (define-instruction repne (segment)
2619 (:printer byte ((op #b11110010)))
2621 (emit-byte segment #b11110010)))
2624 ;;;; bit manipulation
2626 (define-instruction bsf (segment dst src)
2627 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2628 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111100)))
2630 (let ((size (matching-operand-size dst src)))
2631 (when (eq size :byte)
2632 (error "can't scan bytes: ~S" src))
2633 (maybe-emit-operand-size-prefix segment size)
2634 (maybe-emit-rex-for-ea segment src dst)
2635 (emit-byte segment #b00001111)
2636 (emit-byte segment #b10111100)
2637 (emit-ea segment src (reg-tn-encoding dst)))))
2639 (define-instruction bsr (segment dst src)
2640 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2641 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111101)))
2643 (let ((size (matching-operand-size dst src)))
2644 (when (eq size :byte)
2645 (error "can't scan bytes: ~S" src))
2646 (maybe-emit-operand-size-prefix segment size)
2647 (maybe-emit-rex-for-ea segment src dst)
2648 (emit-byte segment #b00001111)
2649 (emit-byte segment #b10111101)
2650 (emit-ea segment src (reg-tn-encoding dst)))))
2652 (defun emit-bit-test-and-mumble (segment src index opcode)
2653 (let ((size (operand-size src)))
2654 (when (eq size :byte)
2655 (error "can't scan bytes: ~S" src))
2656 (maybe-emit-operand-size-prefix segment size)
2657 (cond ((integerp index)
2658 (maybe-emit-rex-for-ea segment src nil)
2659 (emit-byte segment #b00001111)
2660 (emit-byte segment #b10111010)
2661 (emit-ea segment src opcode)
2662 (emit-byte segment index))
2664 (maybe-emit-rex-for-ea segment src index)
2665 (emit-byte segment #b00001111)
2666 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2667 (emit-ea segment src (reg-tn-encoding index))))))
2669 (eval-when (:compile-toplevel :execute)
2670 (defun bit-test-inst-printer-list (subop)
2671 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2672 (reg/mem nil :type reg/mem)
2673 (imm nil :type imm-byte)
2675 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2677 (:name :tab reg/mem ", " reg)))))
2679 (define-instruction bt (segment src index)
2680 (:printer-list (bit-test-inst-printer-list #b100))
2682 (emit-bit-test-and-mumble segment src index #b100)))
2684 (define-instruction btc (segment src index)
2685 (:printer-list (bit-test-inst-printer-list #b111))
2687 (emit-bit-test-and-mumble segment src index #b111)))
2689 (define-instruction btr (segment src index)
2690 (:printer-list (bit-test-inst-printer-list #b110))
2692 (emit-bit-test-and-mumble segment src index #b110)))
2694 (define-instruction bts (segment src index)
2695 (:printer-list (bit-test-inst-printer-list #b101))
2697 (emit-bit-test-and-mumble segment src index #b101)))
2700 ;;;; control transfer
2702 (define-instruction call (segment where)
2703 (:printer near-jump ((op #b11101000)))
2704 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2705 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b010))))
2709 (emit-byte segment #b11101000) ; 32 bit relative
2710 (emit-back-patch segment
2712 (lambda (segment posn)
2713 (emit-signed-dword segment
2714 (- (label-position where)
2717 ;; There is no CALL rel64...
2718 (error "Cannot CALL a fixup: ~S" where))
2720 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2721 (emit-byte segment #b11111111)
2722 (emit-ea segment where #b010)))))
2724 (defun emit-byte-displacement-backpatch (segment target)
2725 (emit-back-patch segment
2727 (lambda (segment posn)
2728 (let ((disp (- (label-position target) (1+ posn))))
2729 (aver (<= -128 disp 127))
2730 (emit-byte segment disp)))))
2732 (define-instruction jmp (segment cond &optional where)
2733 ;; conditional jumps
2734 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2735 (:printer near-cond-jump () '('j cc :tab label))
2736 ;; unconditional jumps
2737 (:printer short-jump ((op #b1011)))
2738 (:printer near-jump ((op #b11101001)))
2739 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2740 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b100))))
2745 (lambda (segment posn delta-if-after)
2746 (let ((disp (- (label-position where posn delta-if-after)
2748 (when (<= -128 disp 127)
2750 (dpb (conditional-opcode cond)
2753 (emit-byte-displacement-backpatch segment where)
2755 (lambda (segment posn)
2756 (let ((disp (- (label-position where) (+ posn 6))))
2757 (emit-byte segment #b00001111)
2759 (dpb (conditional-opcode cond)
2762 (emit-signed-dword segment disp)))))
2763 ((label-p (setq where cond))
2766 (lambda (segment posn delta-if-after)
2767 (let ((disp (- (label-position where posn delta-if-after)
2769 (when (<= -128 disp 127)
2770 (emit-byte segment #b11101011)
2771 (emit-byte-displacement-backpatch segment where)
2773 (lambda (segment posn)
2774 (let ((disp (- (label-position where) (+ posn 5))))
2775 (emit-byte segment #b11101001)
2776 (emit-signed-dword segment disp)))))
2778 (emit-byte segment #b11101001)
2779 (emit-relative-fixup segment where))
2781 (unless (or (ea-p where) (tn-p where))
2782 (error "don't know what to do with ~A" where))
2783 ;; near jump defaults to 64 bit
2784 ;; w-bit in rex prefix is unnecessary
2785 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2786 (emit-byte segment #b11111111)
2787 (emit-ea segment where #b100)))))
2789 (define-instruction ret (segment &optional stack-delta)
2790 (:printer byte ((op #b11000011)))
2791 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2794 (cond ((and stack-delta (not (zerop stack-delta)))
2795 (emit-byte segment #b11000010)
2796 (emit-word segment stack-delta))
2798 (emit-byte segment #b11000011)))))
2800 (define-instruction jrcxz (segment target)
2801 (:printer short-jump ((op #b0011)))
2803 (emit-byte segment #b11100011)
2804 (emit-byte-displacement-backpatch segment target)))
2806 (define-instruction loop (segment target)
2807 (:printer short-jump ((op #b0010)))
2809 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2810 (emit-byte-displacement-backpatch segment target)))
2812 (define-instruction loopz (segment target)
2813 (:printer short-jump ((op #b0001)))
2815 (emit-byte segment #b11100001)
2816 (emit-byte-displacement-backpatch segment target)))
2818 (define-instruction loopnz (segment target)
2819 (:printer short-jump ((op #b0000)))
2821 (emit-byte segment #b11100000)
2822 (emit-byte-displacement-backpatch segment target)))
2824 ;;;; conditional move
2825 (define-instruction cmov (segment cond dst src)
2826 (:printer cond-move ())
2827 (:printer rex-cond-move ())
2829 (aver (register-p dst))
2830 (let ((size (matching-operand-size dst src)))
2831 (aver (or (eq size :word) (eq size :dword) (eq size :qword)))
2832 (maybe-emit-operand-size-prefix segment size))
2833 (maybe-emit-rex-for-ea segment src dst)
2834 (emit-byte segment #b00001111)
2835 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2836 (emit-ea segment src (reg-tn-encoding dst))))
2838 ;;;; conditional byte set
2840 (define-instruction set (segment dst cond)
2841 (:printer cond-set ())
2843 (maybe-emit-rex-for-ea segment dst nil)
2844 (emit-byte segment #b00001111)
2845 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2846 (emit-ea segment dst #b000)))
2850 (define-instruction enter (segment disp &optional (level 0))
2851 (:declare (type (unsigned-byte 16) disp)
2852 (type (unsigned-byte 8) level))
2853 (:printer enter-format ((op #b11001000)))
2855 (emit-byte segment #b11001000)
2856 (emit-word segment disp)
2857 (emit-byte segment level)))
2859 (define-instruction leave (segment)
2860 (:printer byte ((op #b11001001)))
2862 (emit-byte segment #b11001001)))
2864 ;;;; interrupt instructions
2866 (defun snarf-error-junk (sap offset &optional length-only)
2867 (let* ((length (sb!sys:sap-ref-8 sap offset))
2868 (vector (make-array length :element-type '(unsigned-byte 8))))
2869 (declare (type sb!sys:system-area-pointer sap)
2870 (type (unsigned-byte 8) length)
2871 (type (simple-array (unsigned-byte 8) (*)) vector))
2873 (values 0 (1+ length) nil nil))
2875 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2877 (collect ((sc-offsets)
2879 (lengths 1) ; the length byte
2881 (error-number (sb!c:read-var-integer vector index)))
2884 (when (>= index length)
2886 (let ((old-index index))
2887 (sc-offsets (sb!c:read-var-integer vector index))
2888 (lengths (- index old-index))))
2889 (values error-number
2895 (defmacro break-cases (breaknum &body cases)
2896 (let ((bn-temp (gensym)))
2897 (collect ((clauses))
2898 (dolist (case cases)
2899 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2900 `(let ((,bn-temp ,breaknum))
2901 (cond ,@(clauses))))))
2904 (defun break-control (chunk inst stream dstate)
2905 (declare (ignore inst))
2906 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2907 ;; XXX: {BYTE,WORD}-IMM-CODE below is a macro defined by the
2908 ;; DEFINE-INSTRUCTION-FORMAT for {BYTE,WORD}-IMM above. Due to
2909 ;; the spectacular design for DEFINE-INSTRUCTION-FORMAT (involving
2910 ;; a call to EVAL in order to define the macros at compile-time
2911 ;; only) they do not even show up as symbols in the target core.
2912 (case #!-ud2-breakpoints (byte-imm-code chunk dstate)
2913 #!+ud2-breakpoints (word-imm-code chunk dstate)
2916 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2919 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2921 (nt "breakpoint trap"))
2922 (#.pending-interrupt-trap
2923 (nt "pending interrupt trap"))
2926 (#.fun-end-breakpoint-trap
2927 (nt "function end breakpoint trap"))
2928 (#.single-step-around-trap
2929 (nt "single-step trap (around)"))
2930 (#.single-step-before-trap
2931 (nt "single-step trap (before)")))))
2933 (define-instruction break (segment code)
2934 (:declare (type (unsigned-byte 8) code))
2935 #!-ud2-breakpoints (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2936 :control #'break-control)
2937 #!+ud2-breakpoints (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
2938 :control #'break-control)
2940 #!-ud2-breakpoints (emit-byte segment #b11001100)
2941 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2942 ;; throw a sigill with 0x0b0f instead and check for this in the
2943 ;; SIGILL handler and pass it on to the sigtrap handler if
2945 #!+ud2-breakpoints (emit-word segment #b0000101100001111)
2946 (emit-byte segment code)))
2948 (define-instruction int (segment number)
2949 (:declare (type (unsigned-byte 8) number))
2950 (:printer byte-imm ((op #b11001101)))
2954 (emit-byte segment #b11001100))
2956 (emit-byte segment #b11001101)
2957 (emit-byte segment number)))))
2959 (define-instruction iret (segment)
2960 (:printer byte ((op #b11001111)))
2962 (emit-byte segment #b11001111)))
2964 ;;;; processor control
2966 (define-instruction hlt (segment)
2967 (:printer byte ((op #b11110100)))
2969 (emit-byte segment #b11110100)))
2971 (define-instruction nop (segment)
2972 (:printer byte ((op #b10010000)))
2974 (emit-byte segment #b10010000)))
2976 (define-instruction wait (segment)
2977 (:printer byte ((op #b10011011)))
2979 (emit-byte segment #b10011011)))
2981 (defun emit-prefix (segment name)
2982 (declare (ignorable segment))
2987 (emit-byte segment #xf0))))
2989 ;;; FIXME: It would be better to make the disassembler understand the prefix as part
2990 ;;; of the instructions...
2991 (define-instruction lock (segment)
2992 (:printer byte ((op #b11110000)))
2994 (bug "LOCK prefix used as a standalone instruction")))
2996 ;;;; miscellaneous hackery
2998 (define-instruction byte (segment byte)
3000 (emit-byte segment byte)))
3002 (define-instruction word (segment word)
3004 (emit-word segment word)))
3006 (define-instruction dword (segment dword)
3008 (emit-dword segment dword)))
3010 (defun emit-header-data (segment type)
3011 (emit-back-patch segment
3013 (lambda (segment posn)
3017 (component-header-length))
3021 (define-instruction simple-fun-header-word (segment)
3023 (emit-header-data segment simple-fun-header-widetag)))
3025 (define-instruction lra-header-word (segment)
3027 (emit-header-data segment return-pc-header-widetag)))
3029 ;;;; Instructions required to do floating point operations using SSE
3031 (defun emit-sse-inst (segment dst src prefix opcode &key operand-size)
3033 (emit-byte segment prefix))
3035 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
3036 (maybe-emit-rex-for-ea segment src dst))
3037 (emit-byte segment #x0f)
3038 (emit-byte segment opcode)
3039 (emit-ea segment src (reg-tn-encoding dst)))
3041 ;; 0110 0110:0000 1111:0111 00gg: 11 010 xmmreg:imm8
3043 (defun emit-sse-inst-with-imm (segment dst/src imm
3048 (emit-byte segment prefix))
3049 (maybe-emit-rex-prefix segment operand-size dst/src nil nil)
3050 (emit-byte segment #x0F)
3051 (emit-byte segment opcode)
3052 (emit-byte segment (logior (ash (logior #b11000 /i) 3)
3053 (reg-tn-encoding dst/src)))
3054 (emit-byte segment imm))
3057 ((define-imm-sse-instruction (name opcode /i)
3058 `(define-instruction ,name (segment dst/src imm)
3059 (:printer ext-rex-xmm-imm ((prefix #x66) (op ,opcode) (/i ,/i)))
3060 (:printer ext-xmm-imm ((prefix #x66) (op ,opcode) (/i ,/i)))
3062 (emit-sse-inst-with-imm segment dst/src imm
3064 :operand-size :do-not-set)))))
3065 (define-imm-sse-instruction pslldq #x73 7)
3066 (define-imm-sse-instruction psllw #x71 6)
3067 (define-imm-sse-instruction pslld #x72 6)
3068 (define-imm-sse-instruction psllq #x73 6)
3070 (define-imm-sse-instruction psraw-imm #x71 4)
3071 (define-imm-sse-instruction psrad-imm #x72 4)
3073 (define-imm-sse-instruction psrldq #x73 3)
3074 (define-imm-sse-instruction psrlw #x71 2)
3075 (define-imm-sse-instruction psrld #x72 2)
3076 (define-imm-sse-instruction psrlq #x73 2))
3078 ;;; Emit an SSE instruction that has an XMM register as the destination
3079 ;;; operand and for which the size of the operands is implicitly given
3080 ;;; by the instruction.
3081 (defun emit-regular-sse-inst (segment dst src prefix opcode)
3082 (aver (xmm-register-p dst))
3083 (emit-sse-inst segment dst src prefix opcode
3084 :operand-size :do-not-set))
3086 ;;; Instructions having an XMM register as the destination operand
3087 ;;; and an XMM register or a memory location as the source operand.
3088 ;;; The operand size is implicitly given by the instruction.
3090 (macrolet ((define-regular-sse-inst (name prefix opcode)
3091 `(define-instruction ,name (segment dst src)
3093 `((:printer ext-xmm-xmm/mem
3094 ((prefix ,prefix) (op ,opcode)))
3095 (:printer ext-rex-xmm-xmm/mem
3096 ((prefix ,prefix) (op ,opcode))))
3097 `((:printer xmm-xmm/mem ((op ,opcode)))
3098 (:printer rex-xmm-xmm/mem ((op ,opcode)))))
3100 (emit-regular-sse-inst segment dst src ,prefix ,opcode)))))
3102 (define-regular-sse-inst andpd #x66 #x54)
3103 (define-regular-sse-inst andps nil #x54)
3104 (define-regular-sse-inst andnpd #x66 #x55)
3105 (define-regular-sse-inst andnps nil #x55)
3106 (define-regular-sse-inst orpd #x66 #x56)
3107 (define-regular-sse-inst orps nil #x56)
3108 (define-regular-sse-inst pand #x66 #xdb)
3109 (define-regular-sse-inst pandn #x66 #xdf)
3110 (define-regular-sse-inst por #x66 #xeb)
3111 (define-regular-sse-inst pxor #x66 #xef)
3112 (define-regular-sse-inst xorpd #x66 #x57)
3113 (define-regular-sse-inst xorps nil #x57)
3115 (define-regular-sse-inst comisd #x66 #x2f)
3116 (define-regular-sse-inst comiss nil #x2f)
3117 (define-regular-sse-inst ucomisd #x66 #x2e)
3118 (define-regular-sse-inst ucomiss nil #x2e)
3119 ;; integer comparison
3120 (define-regular-sse-inst pcmpeqb #x66 #x74)
3121 (define-regular-sse-inst pcmpeqw #x66 #x75)
3122 (define-regular-sse-inst pcmpeqd #x66 #x76)
3123 (define-regular-sse-inst pcmpgtb #x66 #x64)
3124 (define-regular-sse-inst pcmpgtw #x66 #x65)
3125 (define-regular-sse-inst pcmpgtd #x66 #x66)
3127 (define-regular-sse-inst maxpd #x66 #x5f)
3128 (define-regular-sse-inst maxps nil #x5f)
3129 (define-regular-sse-inst maxsd #xf2 #x5f)
3130 (define-regular-sse-inst maxss #xf3 #x5f)
3131 (define-regular-sse-inst minpd #x66 #x5d)
3132 (define-regular-sse-inst minps nil #x5d)
3133 (define-regular-sse-inst minsd #xf2 #x5d)
3134 (define-regular-sse-inst minss #xf3 #x5d)
3136 (define-regular-sse-inst pmaxsw #x66 #xee)
3137 (define-regular-sse-inst pmaxub #x66 #xde)
3138 (define-regular-sse-inst pminsw #x66 #xea)
3139 (define-regular-sse-inst pminub #x66 #xda)
3141 (define-regular-sse-inst addpd #x66 #x58)
3142 (define-regular-sse-inst addps nil #x58)
3143 (define-regular-sse-inst addsd #xf2 #x58)
3144 (define-regular-sse-inst addss #xf3 #x58)
3145 (define-regular-sse-inst divpd #x66 #x5e)
3146 (define-regular-sse-inst divps nil #x5e)
3147 (define-regular-sse-inst divsd #xf2 #x5e)
3148 (define-regular-sse-inst divss #xf3 #x5e)
3149 (define-regular-sse-inst mulpd #x66 #x59)
3150 (define-regular-sse-inst mulps nil #x59)
3151 (define-regular-sse-inst mulsd #xf2 #x59)
3152 (define-regular-sse-inst mulss #xf3 #x59)
3153 (define-regular-sse-inst rccps nil #x53)
3154 (define-regular-sse-inst rcpss #xf3 #x53)
3155 (define-regular-sse-inst rsqrtps nil #x52)
3156 (define-regular-sse-inst rsqrtss #xf3 #x52)
3157 (define-regular-sse-inst sqrtps nil #x51)
3158 (define-regular-sse-inst sqrtsd #xf2 #x51)
3159 (define-regular-sse-inst sqrtss #xf3 #x51)
3160 (define-regular-sse-inst subpd #x66 #x5c)
3161 (define-regular-sse-inst subps nil #x5c)
3162 (define-regular-sse-inst subsd #xf2 #x5c)
3163 (define-regular-sse-inst subss #xf3 #x5c)
3164 (define-regular-sse-inst unpckhpd #x66 #x15)
3165 (define-regular-sse-inst unpckhps nil #x15)
3166 (define-regular-sse-inst unpcklpd #x66 #x14)
3167 (define-regular-sse-inst unpcklps nil #x14)
3168 ;; integer arithmetic
3169 (define-regular-sse-inst paddb #x66 #xfc)
3170 (define-regular-sse-inst paddw #x66 #xfd)
3171 (define-regular-sse-inst paddd #x66 #xfe)
3172 (define-regular-sse-inst paddq #x66 #xd4)
3173 (define-regular-sse-inst paddsb #x66 #xec)
3174 (define-regular-sse-inst paddsw #x66 #xed)
3175 (define-regular-sse-inst paddusb #x66 #xdc)
3176 (define-regular-sse-inst padduwb #x66 #xdd)
3177 (define-regular-sse-inst pavgb #x66 #xe0)
3178 (define-regular-sse-inst pavgw #x66 #xe3)
3179 (define-regular-sse-inst pmaddwd #x66 #xf5)
3180 (define-regular-sse-inst pmulhuw #x66 #xe4)
3181 (define-regular-sse-inst pmulhw #x66 #xe5)
3182 (define-regular-sse-inst pmullw #x66 #xd5)
3183 (define-regular-sse-inst pmuludq #x66 #xf4)
3184 (define-regular-sse-inst psadbw #x66 #xf6)
3185 (define-regular-sse-inst psraw #x66 #xe1)
3186 (define-regular-sse-inst psrad #x66 #xe2)
3187 (define-regular-sse-inst psubb #x66 #xf8)
3188 (define-regular-sse-inst psubw #x66 #xf9)
3189 (define-regular-sse-inst psubd #x66 #xfa)
3190 (define-regular-sse-inst psubq #x66 #xfb)
3191 (define-regular-sse-inst psubsb #x66 #xd8)
3192 (define-regular-sse-inst psubsw #x66 #xd9)
3194 (define-regular-sse-inst cvtdq2pd #xf3 #xe6)
3195 (define-regular-sse-inst cvtdq2ps nil #x5b)
3196 (define-regular-sse-inst cvtpd2dq #xf2 #xe6)
3197 (define-regular-sse-inst cvtpd2ps #x66 #x5a)
3198 (define-regular-sse-inst cvtps2dq #x66 #x5b)
3199 (define-regular-sse-inst cvtps2pd nil #x5a)
3200 (define-regular-sse-inst cvtsd2ss #xf2 #x5a)
3201 (define-regular-sse-inst cvtss2sd #xf3 #x5a)
3202 (define-regular-sse-inst cvttpd2dq #x66 #xe6)
3203 (define-regular-sse-inst cvttps2dq #xf3 #x5b)
3205 (define-regular-sse-inst movntdq #x66 #xe7)
3206 (define-regular-sse-inst movntpd #x66 #x2b)
3207 (define-regular-sse-inst movntps nil #x2b)
3209 (define-regular-sse-inst packsswb #x66 #x63)
3210 (define-regular-sse-inst packssdw #x66 #x6b)
3211 (define-regular-sse-inst punpckhbw #x66 #x68)
3212 (define-regular-sse-inst punpckhwd #x66 #x69)
3213 (define-regular-sse-inst punpckhdq #x66 #x6a)
3214 (define-regular-sse-inst punpckhqdq #x66 #x6d)
3215 (define-regular-sse-inst punpcklbw #x66 #x60)
3216 (define-regular-sse-inst punpcklwd #x66 #x61)
3217 (define-regular-sse-inst punpckldq #x66 #x62)
3218 (define-regular-sse-inst punpcklqdq #x66 #x6c))
3220 (macrolet ((define-xmm-shuffle-sse-inst (name prefix opcode)
3221 `(define-instruction ,name (segment dst src pattern)
3223 `((:printer ext-xmm-xmm/mem-imm ; suboptimal
3224 ((prefix ,prefix) (op ,opcode)))
3225 (:printer ext-rex-xmm-xmm/mem-imm
3226 ((prefix ,prefix) (op ,opcode))))
3227 `((:printer xmm-xmm/mem-imm ((op ,opcode)))
3228 (:printer rex-xmm-xmm/mem-imm ((op ,opcode)))))
3230 (aver (typep pattern '(unsigned-byte 8)))
3231 (emit-regular-sse-inst segment dst src ,prefix ,opcode)
3232 (emit-byte segment pattern)))))
3233 (define-xmm-shuffle-sse-inst pshufd #x66 #x70)
3234 (define-xmm-shuffle-sse-inst pshufhw #xf3 #x70)
3235 (define-xmm-shuffle-sse-inst pshuflw #xf2 #x70)
3236 (define-xmm-shuffle-sse-inst shufpd #x66 #xc6)
3237 (define-xmm-shuffle-sse-inst shufps nil #xc6))
3239 ;; MASKMOVDQU (dst is DS:RDI)
3240 (define-instruction maskmovdqu (segment src mask)
3241 (:printer ext-xmm-xmm/mem
3242 ((prefix #x66) (op #xf7)))
3243 (:printer ext-rex-xmm-xmm/mem
3244 ((prefix #x66) (op #xf7)))
3246 (aver (xmm-register-p src))
3247 (aver (xmm-register-p mask))
3248 (emit-regular-sse-inst segment src mask #x66 #xf7)))
3250 (macrolet ((define-xmm-comparison-sse-inst (name prefix opcode &optional name-prefix name-suffix)
3251 (let ((printer (when name-prefix
3252 `'(,name-prefix cc ,name-suffix :tab reg ", " reg/mem))))
3253 `(define-instruction ,name (segment op x y)
3255 `((:printer ext-xmm-xmm/mem-cmp
3256 ((prefix ,prefix) (op ,opcode))
3257 ,@(and printer `(,printer)))
3258 (:printer ext-rex-xmm-xmm/mem-cmp
3259 ((prefix ,prefix) (op ,opcode))
3260 ,@(and printer `(,printer))))
3261 `((:printer xmm-xmm/mem-cmp ((op ,opcode))
3262 ,@(and printer `(,printer)))
3263 (:printer rex-xmm-xmm/mem-cmp ((op ,opcode))
3264 ,@(and printer `(,printer)))))
3266 (let ((code (position op *sse-conditions*)))
3268 (emit-regular-sse-inst segment x y ,prefix ,opcode)
3269 (emit-byte segment code)))))))
3270 (define-xmm-comparison-sse-inst cmppd #x66 #xc2 "CMP" "PD")
3271 (define-xmm-comparison-sse-inst cmpps nil #xc2 "CMP" "PS")
3272 (define-xmm-comparison-sse-inst cmpsd #xf2 #xc2 "CMP" "SD")
3273 (define-xmm-comparison-sse-inst cmpss #xf3 #xc2 "CMP" "SS"))
3276 (macrolet ((define-movsd/ss-sse-inst (name prefix)
3277 `(define-instruction ,name (segment dst src)
3278 (:printer ext-xmm-xmm/mem-dir ((prefix ,prefix)
3280 (:printer ext-rex-xmm-xmm/mem-dir ((prefix ,prefix)
3283 (cond ((xmm-register-p dst)
3284 (emit-sse-inst segment dst src ,prefix #x10
3285 :operand-size :do-not-set))
3287 (aver (xmm-register-p src))
3288 (emit-sse-inst segment src dst ,prefix #x11
3289 :operand-size :do-not-set)))))))
3290 (define-movsd/ss-sse-inst movsd #xf2)
3291 (define-movsd/ss-sse-inst movss #xf3))
3294 (macrolet ((define-mov-sse-inst (name prefix opcode-from opcode-to
3295 &key force-to-mem reg-reg-name)
3298 `(define-instruction ,reg-reg-name (segment dst src)
3300 (aver (xmm-register-p dst))
3301 (aver (xmm-register-p src))
3302 (emit-regular-sse-inst segment dst src ,prefix ,opcode-from))))
3303 (define-instruction ,name (segment dst src)
3305 `((:printer ext-xmm-xmm/mem
3306 ((prefix ,prefix) (op ,opcode-from)))
3307 (:printer ext-rex-xmm-xmm/mem
3308 ((prefix ,prefix) (op ,opcode-from)))
3309 (:printer ext-xmm-xmm/mem
3310 ((prefix ,prefix) (op ,opcode-to))
3311 '(:name :tab reg/mem ", " reg))
3312 (:printer ext-rex-xmm-xmm/mem
3313 ((prefix ,prefix) (op ,opcode-to))
3314 '(:name :tab reg/mem ", " reg)))
3315 `((:printer xmm-xmm/mem
3316 ((op ,opcode-from)))
3317 (:printer rex-xmm-xmm/mem
3318 ((op ,opcode-from)))
3319 (:printer xmm-xmm/mem
3321 '(:name :tab reg/mem ", " reg))
3322 (:printer rex-xmm-xmm/mem
3324 '(:name :tab reg/mem ", " reg))))
3326 (cond ((xmm-register-p dst)
3328 `(aver (not (or (register-p src)
3329 (xmm-register-p src)))))
3330 (emit-regular-sse-inst segment dst src ,prefix ,opcode-from))
3332 (aver (xmm-register-p src))
3334 `(aver (not (or (register-p dst)
3335 (xmm-register-p dst)))))
3336 (emit-regular-sse-inst segment src dst ,prefix ,opcode-to))))))))
3338 (define-mov-sse-inst movapd #x66 #x28 #x29)
3339 (define-mov-sse-inst movaps nil #x28 #x29)
3340 (define-mov-sse-inst movdqa #x66 #x6f #x7f)
3341 (define-mov-sse-inst movdqu #xf3 #x6f #x7f)
3343 ;; use movhps for movlhps and movlps for movhlps
3344 (define-mov-sse-inst movhpd #x66 #x16 #x17 :force-to-mem t)
3345 (define-mov-sse-inst movhps nil #x16 #x17 :reg-reg-name movlhps)
3346 (define-mov-sse-inst movlpd #x66 #x12 #x13 :force-to-mem t)
3347 (define-mov-sse-inst movlps nil #x12 #x13 :reg-reg-name movhlps)
3348 (define-mov-sse-inst movupd #x66 #x10 #x11)
3349 (define-mov-sse-inst movups nil #x10 #x11))
3352 (define-instruction movq (segment dst src)
3353 (:printer ext-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3354 (:printer ext-rex-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3355 (:printer ext-xmm-xmm/mem ((prefix #x66) (op #xd6))
3356 '(:name :tab reg/mem ", " reg))
3357 (:printer ext-rex-xmm-xmm/mem ((prefix #x66) (op #xd6))
3358 '(:name :tab reg/mem ", " reg))
3360 (cond ((xmm-register-p dst)
3361 (emit-sse-inst segment dst src #xf3 #x7e
3362 :operand-size :do-not-set))
3364 (aver (xmm-register-p src))
3365 (emit-sse-inst segment src dst #x66 #xd6
3366 :operand-size :do-not-set)))))
3368 ;;; Instructions having an XMM register as the destination operand
3369 ;;; and a general-purpose register or a memory location as the source
3370 ;;; operand. The operand size is calculated from the source operand.
3372 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
3373 ;;; a memory location to the low order 32 or 64 bits of an XMM register
3374 ;;; with zero extension or vice versa.
3375 ;;; We do not support the MMX version of this instruction.
3376 (define-instruction movd (segment dst src)
3377 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x6e)))
3378 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x6e)))
3379 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x7e))
3380 '(:name :tab reg/mem ", " reg))
3381 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x7e))
3382 '(:name :tab reg/mem ", " reg))
3384 (cond ((xmm-register-p dst)
3385 (emit-sse-inst segment dst src #x66 #x6e))
3387 (aver (xmm-register-p src))
3388 (emit-sse-inst segment src dst #x66 #x7e)))))
3390 (macrolet ((define-integer-source-sse-inst (name prefix opcode &key mem-only)
3391 `(define-instruction ,name (segment dst src)
3393 `((:printer ext-xmm-reg/mem ((prefix ,prefix) (op ,opcode)))
3394 (:printer ext-rex-xmm-reg/mem ((prefix ,prefix) (op ,opcode))))
3395 `((:printer xmm-reg/mem ((op ,opcode)))
3396 (:printer rex-xmm-reg/mem ((op ,opcode)))))
3399 (aver (xmm-register-p dst))
3401 `(aver (not (or (register-p src)
3402 (xmm-register-p src)))))
3403 (let ((src-size (operand-size src)))
3404 (aver (or (eq src-size :qword) (eq src-size :dword))))
3405 (emit-sse-inst segment dst src ,prefix ,opcode)))))
3406 (define-integer-source-sse-inst cvtsi2sd #xf2 #x2a)
3407 (define-integer-source-sse-inst cvtsi2ss #xf3 #x2a)
3408 ;; FIXME: memory operand is always a QWORD
3409 (define-integer-source-sse-inst cvtpi2pd #x66 #x2a :mem-only t)
3410 (define-integer-source-sse-inst cvtpi2ps nil #x2a :mem-only t))
3412 ;;; Instructions having a general-purpose register as the destination
3413 ;;; operand and an XMM register or a memory location as the source
3414 ;;; operand. The operand size is calculated from the destination
3417 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode &key reg-only)
3418 `(define-instruction ,name (segment dst src)
3420 `((:printer ext-reg-xmm/mem ((prefix ,prefix) (op ,opcode)))
3421 (:printer ext-rex-reg-xmm/mem ((prefix ,prefix) (op ,opcode))))
3422 `((:printer reg-xmm/mem ((op ,opcode)))
3423 (:printer rex-reg-xmm/mem ((op ,opcode)))))
3425 (aver (register-p dst))
3427 `(aver (xmm-register-p src)))
3428 (let ((dst-size (operand-size dst)))
3429 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3430 (emit-sse-inst segment dst src ,prefix ,opcode
3431 :operand-size dst-size))))))
3432 (define-gpr-destination-sse-inst cvtsd2si #xf2 #x2d)
3433 (define-gpr-destination-sse-inst cvtss2si #xf3 #x2d)
3434 (define-gpr-destination-sse-inst cvttsd2si #xf2 #x2c)
3435 (define-gpr-destination-sse-inst cvttss2si #xf3 #x2c)
3436 (define-gpr-destination-sse-inst movmskpd #x66 #x50 :reg-only t)
3437 (define-gpr-destination-sse-inst movmskps nil #x50 :reg-only t)
3438 (define-gpr-destination-sse-inst pmovmskb #x66 #xd7 :reg-only t))
3440 ;;; Other SSE instructions
3442 ;; FIXME: is that right!?
3443 (define-instruction movnti (segment dst src)
3444 (:printer ext-reg-reg/mem-no-width ((op #xc3)))
3445 (:printer rex-ext-reg-reg/mem-no-width ((op #xc3)))
3447 (aver (not (or (register-p dst)
3448 (xmm-register-p dst))))
3449 (aver (register-p src))
3450 (maybe-emit-rex-for-ea segment src dst)
3451 (emit-byte segment #x0f)
3452 (emit-byte segment #xc3)
3453 (emit-ea segment dst (reg-tn-encoding src))))
3455 (define-instruction prefetch (segment type src)
3456 (:printer ext-reg/mem-no-width ((op '(#x18 0)))
3457 '("PREFETCHNTA" :tab reg/mem))
3458 (:printer ext-reg/mem-no-width ((op '(#x18 1)))
3459 '("PREFETCHT0" :tab reg/mem))
3460 (:printer ext-reg/mem-no-width ((op '(#x18 2)))
3461 '("PREFETCHT1" :tab reg/mem))
3462 (:printer ext-reg/mem-no-width ((op '(#x18 3)))
3463 '("PREFETCHT2" :tab reg/mem))
3464 (:printer rex-ext-reg/mem-no-width ((op '(#x18 0)))
3465 '("PREFETCHNTA" :tab reg/mem))
3466 (:printer rex-ext-reg/mem-no-width ((op '(#x18 1)))
3467 '("PREFETCHT0" :tab reg/mem))
3468 (:printer rex-ext-reg/mem-no-width ((op '(#x18 2)))
3469 '("PREFETCHT1" :tab reg/mem))
3470 (:printer rex-ext-reg/mem-no-width ((op '(#x18 3)))
3471 '("PREFETCHT2" :tab reg/mem))
3473 (aver (not (or (register-p src)
3474 (xmm-register-p src))))
3475 (aver (eq (operand-size src) :byte))
3476 (let ((type (position type #(:nta :t0 :t1 :t2))))
3478 (maybe-emit-rex-for-ea segment src nil)
3479 (emit-byte segment #x0f)
3480 (emit-byte segment #x18)
3481 (emit-ea segment src type))))
3483 (define-instruction clflush (segment src)
3484 (:printer ext-reg/mem-no-width ((op '(#xae 7))))
3485 (:printer rex-ext-reg/mem-no-width ((op '(#xae 7))))
3487 (aver (not (or (register-p src)
3488 (xmm-register-p src))))
3489 (aver (eq (operand-size src) :byte))
3490 (maybe-emit-rex-for-ea segment src nil)
3491 (emit-byte segment #x0f)
3492 (emit-byte segment #x18)
3493 (emit-ea segment src 7)))
3495 (macrolet ((define-fence-instruction (name last-byte)
3496 `(define-instruction ,name (segment)
3497 (:printer three-bytes ((op '(#x0f #xae ,last-byte))))
3499 (emit-byte segment #x0f)
3500 (emit-byte segment #xae)
3501 (emit-byte segment ,last-byte)))))
3502 (define-fence-instruction lfence #b11101000)
3503 (define-fence-instruction mfence #b11110000)
3504 (define-fence-instruction sfence #b11111000))
3506 (define-instruction pause (segment)
3507 (:printer two-bytes ((op '(#xf3 #x90))))
3509 (emit-byte segment #xf3)
3510 (emit-byte segment #x90)))
3512 (define-instruction ldmxcsr (segment src)
3513 (:printer ext-reg/mem-no-width ((op '(#xae 2))))
3514 (:printer rex-ext-reg/mem-no-width ((op '(#xae 2))))
3516 (aver (not (or (register-p src)
3517 (xmm-register-p src))))
3518 (aver (eq (operand-size src) :dword))
3519 (maybe-emit-rex-for-ea segment src nil)
3520 (emit-byte segment #x0f)
3521 (emit-byte segment #xae)
3522 (emit-ea segment src 2)))
3524 (define-instruction stmxcsr (segment dst)
3525 (:printer ext-reg/mem-no-width ((op '(#xae 3))))
3526 (:printer rex-ext-reg/mem-no-width ((op '(#xae 3))))
3528 (aver (not (or (register-p dst)
3529 (xmm-register-p dst))))
3530 (aver (eq (operand-size dst) :dword))
3531 (maybe-emit-rex-for-ea segment dst nil)
3532 (emit-byte segment #x0f)
3533 (emit-byte segment #xae)
3534 (emit-ea segment dst 3)))
3538 (define-instruction cpuid (segment)
3539 (:printer two-bytes ((op '(#b00001111 #b10100010))))
3541 (emit-byte segment #b00001111)
3542 (emit-byte segment #b10100010)))
3544 (define-instruction rdtsc (segment)
3545 (:printer two-bytes ((op '(#b00001111 #b00110001))))
3547 (emit-byte segment #b00001111)
3548 (emit-byte segment #b00110001)))
3550 ;;;; Late VM definitions
3552 (defun canonicalize-inline-constant (constant &aux (alignedp nil))
3553 (let ((first (car constant)))
3554 (when (eql first :aligned)
3557 (setf first (car constant)))
3559 (single-float (setf constant (list :single-float first)))
3560 (double-float (setf constant (list :double-float first)))
3561 ((complex single-float)
3562 (setf constant (list :complex-single-float first)))
3563 ((complex double-float)
3564 (setf constant (list :complex-double-float first)))))
3565 (destructuring-bind (type value) constant
3567 ((:byte :word :dword :qword)
3568 (aver (integerp value))
3571 (aver (base-char-p value))
3572 (cons :byte (char-code value)))
3574 (aver (characterp value))
3575 (cons :dword (char-code value)))
3577 (aver (typep value 'single-float))
3578 (cons (if alignedp :oword :dword)
3579 (ldb (byte 32 0) (single-float-bits value))))
3581 (aver (typep value 'double-float))
3582 (cons (if alignedp :oword :qword)
3583 (ldb (byte 64 0) (logior (ash (double-float-high-bits value) 32)
3584 (double-float-low-bits value)))))
3585 ((:complex-single-float)
3586 (aver (typep value '(complex single-float)))
3587 (cons (if alignedp :oword :qword)
3589 (logior (ash (single-float-bits (imagpart value)) 32)
3591 (single-float-bits (realpart value)))))))
3593 (aver (integerp value))
3594 (cons :oword value))
3595 ((:complex-double-float)
3596 (aver (typep value '(complex double-float)))
3598 (logior (ash (double-float-high-bits (imagpart value)) 96)
3599 (ash (double-float-low-bits (imagpart value)) 64)
3600 (ash (ldb (byte 32 0)
3601 (double-float-high-bits (realpart value)))
3603 (double-float-low-bits (realpart value))))))))
3605 (defun inline-constant-value (constant)
3606 (let ((label (gen-label))
3607 (size (ecase (car constant)
3608 ((:byte :word :dword :qword) (car constant))
3609 ((:oword) :qword))))
3610 (values label (make-ea size
3611 :disp (make-fixup nil :code-object label)))))
3613 (defun emit-constant-segment-header (constants optimize)
3614 (declare (ignore constants))
3615 (loop repeat (if optimize 64 16) do (inst byte #x90)))
3617 (defun size-nbyte (size)
3625 (defun sort-inline-constants (constants)
3626 (stable-sort constants #'> :key (lambda (constant)
3627 (size-nbyte (caar constant)))))
3629 (defun emit-inline-constant (constant label)
3630 (let ((size (size-nbyte (car constant))))
3631 (emit-alignment (integer-length (1- size)))
3633 (let ((val (cdr constant)))
3635 do (inst byte (ldb (byte 8 0) val))
3636 (setf val (ash val -8))))))