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 ;;; This prefilter is used solely for its side effects, namely to put
225 ;;; the bits found in the REX prefix into the DSTATE for use by other
226 ;;; prefilters and by printers.
227 (defun prefilter-wrxb (value dstate)
228 (declare (type (unsigned-byte 4) value)
229 (type sb!disassem:disassem-state dstate))
230 (sb!disassem:dstate-put-inst-prop dstate 'rex)
231 (when (plusp (logand value #b1000))
232 (sb!disassem:dstate-put-inst-prop dstate 'rex-w))
233 (when (plusp (logand value #b0100))
234 (sb!disassem:dstate-put-inst-prop dstate 'rex-r))
235 (when (plusp (logand value #b0010))
236 (sb!disassem:dstate-put-inst-prop dstate 'rex-x))
237 (when (plusp (logand value #b0001))
238 (sb!disassem:dstate-put-inst-prop dstate 'rex-b))
241 ;;; This prefilter is used solely for its side effect, namely to put
242 ;;; the property OPERAND-SIZE-8 into the DSTATE if VALUE is 0.
243 (defun prefilter-width (value dstate)
244 (declare (type bit value)
245 (type sb!disassem:disassem-state dstate))
247 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-8))
250 ;;; This prefilter is used solely for its side effect, namely to put
251 ;;; the property OPERAND-SIZE-16 into the DSTATE.
252 (defun prefilter-x66 (value dstate)
253 (declare (type (eql #x66) value)
255 (type sb!disassem:disassem-state dstate))
256 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-16))
258 ;;; A register field that can be extended by REX.R.
259 (defun prefilter-reg-r (value dstate)
260 (declare (type reg value)
261 (type sb!disassem:disassem-state dstate))
262 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-r)
266 ;;; A register field that can be extended by REX.B.
267 (defun prefilter-reg-b (value dstate)
268 (declare (type reg value)
269 (type sb!disassem:disassem-state dstate))
270 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-b)
274 ;;; Returns either an integer, meaning a register, or a list of
275 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
276 ;;; may be missing or nil to indicate that it's not used or has the
277 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
278 ;;; of the mod and r/m field of the ModRM byte of the instruction.
279 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
280 ;;; REX.B bit from DSTATE is used to extend the sole register or the
281 ;;; BASE-REG to a full register, the REX.X bit does the same for the
283 (defun prefilter-reg/mem (value dstate)
284 (declare (type list value)
285 (type sb!disassem:disassem-state dstate))
286 (let ((mod (first value))
287 (r/m (second value)))
288 (declare (type (unsigned-byte 2) mod)
289 (type (unsigned-byte 3) r/m))
290 (let ((full-reg (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
293 (declare (type full-reg full-reg))
299 (let ((sib (sb!disassem:read-suffix 8 dstate)))
300 (declare (type (unsigned-byte 8) sib))
301 (let ((base-reg (ldb (byte 3 0) sib))
302 (index-reg (ldb (byte 3 3) sib))
303 (index-scale (ldb (byte 2 6) sib)))
304 (declare (type (unsigned-byte 3) base-reg index-reg)
305 (type (unsigned-byte 2) index-scale))
309 (if (= base-reg #b101)
310 (sb!disassem:read-signed-suffix 32 dstate)
313 (sb!disassem:read-signed-suffix 8 dstate))
315 (sb!disassem:read-signed-suffix 32 dstate)))))
316 (list (unless (and (= mod #b00) (= base-reg #b101))
317 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
321 (unless (= index-reg #b100)
322 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-x)
325 (ash 1 index-scale))))))
326 ((and (= mod #b00) (= r/m #b101))
327 (list 'rip (sb!disassem:read-signed-suffix 32 dstate)))
331 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
333 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
335 (defun read-address (value dstate)
336 (declare (ignore value)) ; always nil anyway
337 (sb!disassem:read-suffix (width-bits (inst-operand-size dstate)) dstate))
339 (defun width-bits (width)
348 ;;;; disassembler argument types
350 ;;; Used to capture the lower four bits of the REX prefix.
351 (sb!disassem:define-arg-type wrxb
352 :prefilter #'prefilter-wrxb)
354 (sb!disassem:define-arg-type width
355 :prefilter #'prefilter-width
356 :printer (lambda (value stream dstate)
357 (declare (ignore value))
358 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
361 ;;; Used to capture the effect of the #x66 operand size override prefix.
362 (sb!disassem:define-arg-type x66
363 :prefilter #'prefilter-x66)
365 (sb!disassem:define-arg-type displacement
367 :use-label #'offset-next
368 :printer (lambda (value stream dstate)
369 (sb!disassem:maybe-note-assembler-routine value nil dstate)
370 (print-label value stream dstate)))
372 (sb!disassem:define-arg-type accum
373 :printer (lambda (value stream dstate)
374 (declare (ignore value)
376 (type sb!disassem:disassem-state dstate))
377 (print-reg 0 stream dstate)))
379 (sb!disassem:define-arg-type reg
380 :prefilter #'prefilter-reg-r
381 :printer #'print-reg)
383 (sb!disassem:define-arg-type reg-b
384 :prefilter #'prefilter-reg-b
385 :printer #'print-reg)
387 (sb!disassem:define-arg-type reg-b-default-qword
388 :prefilter #'prefilter-reg-b
389 :printer #'print-reg-default-qword)
391 (sb!disassem:define-arg-type imm-addr
392 :prefilter #'read-address
393 :printer #'print-label)
395 ;;; Normally, immediate values for an operand size of :qword are of size
396 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
397 ;;; argument type definition following this one.
398 (sb!disassem:define-arg-type signed-imm-data
399 :prefilter (lambda (value dstate)
400 (declare (ignore value)) ; always nil anyway
401 (let ((width (width-bits (inst-operand-size dstate))))
404 (sb!disassem:read-signed-suffix width dstate))))
406 ;;; Used by the variant of the MOV instruction with opcode B8 which can
407 ;;; move immediates of all sizes (i.e. including :qword) into a
409 (sb!disassem:define-arg-type signed-imm-data-upto-qword
410 :prefilter (lambda (value dstate)
411 (declare (ignore value)) ; always nil anyway
412 (sb!disassem:read-signed-suffix
413 (width-bits (inst-operand-size dstate))
416 ;;; Used by those instructions that have a default operand size of
417 ;;; :qword. Nevertheless the immediate is at most of size :dword.
418 ;;; The only instruction of this kind having a variant with an immediate
419 ;;; argument is PUSH.
420 (sb!disassem:define-arg-type signed-imm-data-default-qword
421 :prefilter (lambda (value dstate)
422 (declare (ignore value)) ; always nil anyway
423 (let ((width (width-bits
424 (inst-operand-size-default-qword dstate))))
427 (sb!disassem:read-signed-suffix width dstate))))
429 (sb!disassem:define-arg-type signed-imm-byte
430 :prefilter (lambda (value dstate)
431 (declare (ignore value)) ; always nil anyway
432 (sb!disassem:read-signed-suffix 8 dstate)))
434 (sb!disassem:define-arg-type imm-byte
435 :prefilter (lambda (value dstate)
436 (declare (ignore value)) ; always nil anyway
437 (sb!disassem:read-suffix 8 dstate)))
439 ;;; needed for the ret imm16 instruction
440 (sb!disassem:define-arg-type imm-word-16
441 :prefilter (lambda (value dstate)
442 (declare (ignore value)) ; always nil anyway
443 (sb!disassem:read-suffix 16 dstate)))
445 (sb!disassem:define-arg-type reg/mem
446 :prefilter #'prefilter-reg/mem
447 :printer #'print-reg/mem)
448 (sb!disassem:define-arg-type sized-reg/mem
449 ;; Same as reg/mem, but prints an explicit size indicator for
450 ;; memory references.
451 :prefilter #'prefilter-reg/mem
452 :printer #'print-sized-reg/mem)
454 ;;; Arguments of type reg/mem with a fixed size.
455 (sb!disassem:define-arg-type sized-byte-reg/mem
456 :prefilter #'prefilter-reg/mem
457 :printer #'print-sized-byte-reg/mem)
458 (sb!disassem:define-arg-type sized-word-reg/mem
459 :prefilter #'prefilter-reg/mem
460 :printer #'print-sized-word-reg/mem)
461 (sb!disassem:define-arg-type sized-dword-reg/mem
462 :prefilter #'prefilter-reg/mem
463 :printer #'print-sized-dword-reg/mem)
465 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
466 (sb!disassem:define-arg-type sized-reg/mem-default-qword
467 :prefilter #'prefilter-reg/mem
468 :printer #'print-sized-reg/mem-default-qword)
471 (sb!disassem:define-arg-type xmmreg
472 :prefilter #'prefilter-reg-r
473 :printer #'print-xmmreg)
475 (sb!disassem:define-arg-type xmmreg-b
476 :prefilter #'prefilter-reg-b
477 :printer #'print-xmmreg)
479 (sb!disassem:define-arg-type xmmreg/mem
480 :prefilter #'prefilter-reg/mem
481 :printer #'print-xmmreg/mem)
484 (eval-when (:compile-toplevel :load-toplevel :execute)
485 (defparameter *conditions*
488 (:b . 2) (:nae . 2) (:c . 2)
489 (:nb . 3) (:ae . 3) (:nc . 3)
490 (:eq . 4) (:e . 4) (:z . 4)
497 (:np . 11) (:po . 11)
498 (:l . 12) (:nge . 12)
499 (:nl . 13) (:ge . 13)
500 (:le . 14) (:ng . 14)
501 (:nle . 15) (:g . 15)))
502 (defparameter *condition-name-vec*
503 (let ((vec (make-array 16 :initial-element nil)))
504 (dolist (cond *conditions*)
505 (when (null (aref vec (cdr cond)))
506 (setf (aref vec (cdr cond)) (car cond))))
510 ;;; SSE shuffle patterns. The names end in the number of bits of the
511 ;;; immediate byte that are used to encode the pattern and the radix
512 ;;; in which to print the value.
513 (macrolet ((define-sse-shuffle-arg-type (name format-string)
514 `(sb!disassem:define-arg-type ,name
516 :printer (lambda (value stream dstate)
517 (declare (type (unsigned-byte 8) value)
520 (format stream ,format-string value)))))
521 (define-sse-shuffle-arg-type sse-shuffle-pattern-2-2 "#b~2,'0B")
522 (define-sse-shuffle-arg-type sse-shuffle-pattern-8-4 "#4r~4,4,'0R"))
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 ;;; Prefix instructions
559 (sb!disassem:define-instruction-format (rex 8)
560 (rex :field (byte 4 4) :value #b0100)
561 (wrxb :field (byte 4 0) :type 'wrxb))
563 (sb!disassem:define-instruction-format (x66 8)
564 (x66 :field (byte 8 0) :type 'x66 :value #x66))
566 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
567 ;;; operand size of :word.
568 (sb!disassem:define-instruction-format (x66-byte 16
569 :default-printer '(:name))
570 (x66 :field (byte 8 0) :value #x66)
571 (op :field (byte 8 8)))
573 ;;; A one-byte instruction with a REX prefix, used to indicate an
574 ;;; operand size of :qword. REX.W must be 1, the other three bits are
576 (sb!disassem:define-instruction-format (rex-byte 16
577 :default-printer '(:name))
578 (rex :field (byte 5 3) :value #b01001)
579 (op :field (byte 8 8)))
581 (sb!disassem:define-instruction-format (simple 8)
582 (op :field (byte 7 1))
583 (width :field (byte 1 0) :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 (reg-no-width 8
602 :default-printer '(:name :tab reg))
603 (op :field (byte 5 3))
604 (reg :field (byte 3 0) :type 'reg-b)
609 ;;; Same as reg-no-width, but with a default operand size of :qword.
610 (sb!disassem:define-instruction-format (reg-no-width-default-qword 8
611 :include 'reg-no-width
612 :default-printer '(:name :tab reg))
613 (reg :type 'reg-b-default-qword))
615 ;;; Adds a width field to reg-no-width. Note that we can't use
616 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
617 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
618 ;;; the one for IMM to be able to determine the correct size of IMM.
619 (sb!disassem:define-instruction-format (reg 8
620 :default-printer '(:name :tab reg))
621 (op :field (byte 4 4))
622 (width :field (byte 1 3) :type 'width)
623 (reg :field (byte 3 0) :type 'reg-b)
628 (sb!disassem:define-instruction-format (rex-reg 16
629 :default-printer '(:name :tab reg))
630 (rex :field (byte 4 4) :value #b0100)
631 (wrxb :field (byte 4 0) :type 'wrxb)
632 (width :field (byte 1 11) :type 'width)
633 (op :field (byte 4 12))
634 (reg :field (byte 3 8) :type 'reg-b)
639 (sb!disassem:define-instruction-format (two-bytes 16
640 :default-printer '(:name))
641 (op :fields (list (byte 8 0) (byte 8 8))))
643 (sb!disassem:define-instruction-format (reg-reg/mem 16
645 `(:name :tab reg ", " reg/mem))
646 (op :field (byte 7 1))
647 (width :field (byte 1 0) :type 'width)
648 (reg/mem :fields (list (byte 2 14) (byte 3 8))
650 (reg :field (byte 3 11) :type 'reg)
654 ;;; same as reg-reg/mem, but with direction bit
655 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
656 :include 'reg-reg/mem
660 ,(swap-if 'dir 'reg/mem ", " 'reg)))
661 (op :field (byte 6 2))
662 (dir :field (byte 1 1)))
664 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
665 (sb!disassem:define-instruction-format (reg/mem 16
666 :default-printer '(:name :tab reg/mem))
667 (op :fields (list (byte 7 1) (byte 3 11)))
668 (width :field (byte 1 0) :type 'width)
669 (reg/mem :fields (list (byte 2 14) (byte 3 8))
670 :type 'sized-reg/mem)
674 ;;; Same as reg/mem, but without a width field and with a default
675 ;;; operand size of :qword.
676 (sb!disassem:define-instruction-format (reg/mem-default-qword 16
677 :default-printer '(:name :tab reg/mem))
678 (op :fields (list (byte 8 0) (byte 3 11)))
679 (reg/mem :fields (list (byte 2 14) (byte 3 8))
680 :type 'sized-reg/mem-default-qword))
682 ;;; Same as reg/mem, but with the immediate value occurring by default,
683 ;;; and with an appropiate printer.
684 (sb!disassem:define-instruction-format (reg/mem-imm 16
687 '(:name :tab reg/mem ", " imm))
688 (reg/mem :type 'sized-reg/mem)
689 (imm :type 'signed-imm-data))
691 ;;; Same as reg/mem, but with using the accumulator in the default printer
692 (sb!disassem:define-instruction-format
694 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
695 (reg/mem :type 'reg/mem) ; don't need a size
696 (accum :type 'accum))
698 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
699 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
701 `(:name :tab reg ", " reg/mem))
702 (prefix :field (byte 8 0) :value #b00001111)
703 (op :field (byte 7 9))
704 (width :field (byte 1 8) :type 'width)
705 (reg/mem :fields (list (byte 2 22) (byte 3 16))
707 (reg :field (byte 3 19) :type 'reg)
711 (sb!disassem:define-instruction-format (ext-reg-reg/mem-no-width 24
713 `(:name :tab reg ", " reg/mem))
714 (prefix :field (byte 8 0) :value #b00001111)
715 (op :field (byte 8 8))
716 (reg/mem :fields (list (byte 2 22) (byte 3 16))
718 (reg :field (byte 3 19) :type 'reg)
722 (sb!disassem:define-instruction-format (ext-reg/mem-no-width 24
724 `(:name :tab reg/mem))
725 (prefix :field (byte 8 0) :value #b00001111)
726 (op :fields (list (byte 8 8) (byte 3 19)))
727 (reg/mem :fields (list (byte 2 22) (byte 3 16))
730 ;;; reg-no-width with #x0f prefix
731 (sb!disassem:define-instruction-format (ext-reg-no-width 16
732 :default-printer '(:name :tab reg))
733 (prefix :field (byte 8 0) :value #b00001111)
734 (op :field (byte 5 11))
735 (reg :field (byte 3 8) :type 'reg-b))
737 ;;; Same as reg/mem, but with a prefix of #b00001111
738 (sb!disassem:define-instruction-format (ext-reg/mem 24
739 :default-printer '(:name :tab reg/mem))
740 (prefix :field (byte 8 0) :value #b00001111)
741 (op :fields (list (byte 7 9) (byte 3 19)))
742 (width :field (byte 1 8) :type 'width)
743 (reg/mem :fields (list (byte 2 22) (byte 3 16))
744 :type 'sized-reg/mem)
748 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
749 :include 'ext-reg/mem
751 '(:name :tab reg/mem ", " imm))
752 (imm :type 'signed-imm-data))
754 ;;;; XMM instructions
756 ;;; All XMM instructions use an extended opcode (#x0F as the first
757 ;;; opcode byte). Therefore in the following "EXT" in the name of the
758 ;;; instruction formats refers to the formats that have an additional
759 ;;; prefix (#x66, #xF2 or #xF3).
761 ;;; Instructions having an XMM register as the destination operand
762 ;;; and an XMM register or a memory location as the source operand.
763 ;;; The size of the operands is implicitly given by the instruction.
764 (sb!disassem:define-instruction-format (xmm-xmm/mem 24
766 '(:name :tab reg ", " reg/mem))
767 (x0f :field (byte 8 0) :value #x0f)
768 (op :field (byte 8 8))
769 (reg/mem :fields (list (byte 2 22) (byte 3 16))
771 (reg :field (byte 3 19) :type 'xmmreg)
775 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem 32
777 '(:name :tab reg ", " reg/mem))
778 (prefix :field (byte 8 0))
779 (x0f :field (byte 8 8) :value #x0f)
780 (op :field (byte 8 16))
781 (reg/mem :fields (list (byte 2 30) (byte 3 24))
783 (reg :field (byte 3 27) :type 'xmmreg)
786 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem 40
788 '(:name :tab reg ", " reg/mem))
789 (prefix :field (byte 8 0))
790 (rex :field (byte 4 12) :value #b0100)
791 (wrxb :field (byte 4 8) :type 'wrxb)
792 (x0f :field (byte 8 16) :value #x0f)
793 (op :field (byte 8 24))
794 (reg/mem :fields (list (byte 2 38) (byte 3 32))
796 (reg :field (byte 3 35) :type 'xmmreg)
799 ;;; Same as xmm-xmm/mem etc., but with direction bit.
801 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-dir 32
802 :include 'ext-xmm-xmm/mem
806 ,(swap-if 'dir 'reg ", " 'reg/mem)))
807 (op :field (byte 7 17))
808 (dir :field (byte 1 16)))
810 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-dir 40
811 :include 'ext-rex-xmm-xmm/mem
815 ,(swap-if 'dir 'reg ", " 'reg/mem)))
816 (op :field (byte 7 25))
817 (dir :field (byte 1 24)))
819 ;;; Instructions having an XMM register as one operand
820 ;;; and a constant (unsigned) byte as the other.
822 (sb!disassem:define-instruction-format (ext-xmm-imm 32
824 '(:name :tab reg/mem ", " imm))
825 (prefix :field (byte 8 0))
826 (x0f :field (byte 8 8) :value #x0f)
827 (op :field (byte 8 16))
828 (/i :field (byte 3 27))
829 (b11 :field (byte 2 30) :value #b11)
830 (reg/mem :field (byte 3 24)
832 (imm :type 'imm-byte))
834 (sb!disassem:define-instruction-format (ext-rex-xmm-imm 40
836 '(:name :tab reg/mem ", " imm))
837 (prefix :field (byte 8 0))
838 (rex :field (byte 4 12) :value #b0100)
839 (wrxb :field (byte 4 8) :type 'wrxb)
840 (x0f :field (byte 8 16) :value #x0f)
841 (op :field (byte 8 24))
842 (/i :field (byte 3 35))
843 (b11 :field (byte 2 38) :value #b11)
844 (reg/mem :field (byte 3 32)
846 (imm :type 'imm-byte))
848 ;;; Instructions having an XMM register as one operand and a general-
849 ;;; -purpose register or a memory location as the other operand.
851 (sb!disassem:define-instruction-format (xmm-reg/mem 24
853 '(:name :tab reg ", " reg/mem))
854 (x0f :field (byte 8 0) :value #x0f)
855 (op :field (byte 8 8))
856 (reg/mem :fields (list (byte 2 22) (byte 3 16))
857 :type 'sized-reg/mem)
858 (reg :field (byte 3 19) :type 'xmmreg))
860 (sb!disassem:define-instruction-format (ext-xmm-reg/mem 32
862 '(:name :tab reg ", " reg/mem))
863 (prefix :field (byte 8 0))
864 (x0f :field (byte 8 8) :value #x0f)
865 (op :field (byte 8 16))
866 (reg/mem :fields (list (byte 2 30) (byte 3 24))
867 :type 'sized-reg/mem)
868 (reg :field (byte 3 27) :type 'xmmreg))
870 (sb!disassem:define-instruction-format (ext-rex-xmm-reg/mem 40
872 '(:name :tab reg ", " reg/mem))
873 (prefix :field (byte 8 0))
874 (rex :field (byte 4 12) :value #b0100)
875 (wrxb :field (byte 4 8) :type 'wrxb)
876 (x0f :field (byte 8 16) :value #x0f)
877 (op :field (byte 8 24))
878 (reg/mem :fields (list (byte 2 38) (byte 3 32))
879 :type 'sized-reg/mem)
880 (reg :field (byte 3 35) :type 'xmmreg))
882 ;;; Instructions having a general-purpose register as one operand and an
883 ;;; XMM register or a memory location as the other operand.
885 (sb!disassem:define-instruction-format (reg-xmm/mem 24
887 '(:name :tab reg ", " reg/mem))
888 (x0f :field (byte 8 0) :value #x0f)
889 (op :field (byte 8 8))
890 (reg/mem :fields (list (byte 2 22) (byte 3 16))
892 (reg :field (byte 3 19) :type 'reg))
894 (sb!disassem:define-instruction-format (ext-reg-xmm/mem 32
896 '(:name :tab reg ", " reg/mem))
897 (prefix :field (byte 8 0))
898 (x0f :field (byte 8 8) :value #x0f)
899 (op :field (byte 8 16))
900 (reg/mem :fields (list (byte 2 30) (byte 3 24))
902 (reg :field (byte 3 27) :type 'reg))
904 (sb!disassem:define-instruction-format (ext-rex-reg-xmm/mem 40
906 '(:name :tab reg ", " reg/mem))
907 (prefix :field (byte 8 0))
908 (rex :field (byte 4 12) :value #b0100)
909 (wrxb :field (byte 4 8) :type 'wrxb)
910 (x0f :field (byte 8 16) :value #x0f)
911 (op :field (byte 8 24))
912 (reg/mem :fields (list (byte 2 38) (byte 3 32))
914 (reg :field (byte 3 35) :type 'reg))
916 ;; XMM comparison instruction
918 (eval-when (:compile-toplevel :load-toplevel :execute)
919 (defparameter *sse-conditions* #(:eq :lt :le :unord :neq :nlt :nle :ord)))
921 (sb!disassem:define-arg-type sse-condition-code
922 ;; Inherit the prefilter from IMM-BYTE to READ-SUFFIX the byte.
924 :printer *sse-conditions*)
926 (sb!disassem:define-instruction-format (string-op 8
928 :default-printer '(:name width)))
930 (sb!disassem:define-instruction-format (short-cond-jump 16)
931 (op :field (byte 4 4))
932 (cc :field (byte 4 0) :type 'condition-code)
933 (label :field (byte 8 8) :type 'displacement))
935 (sb!disassem:define-instruction-format (short-jump 16
936 :default-printer '(:name :tab label))
937 (const :field (byte 4 4) :value #b1110)
938 (op :field (byte 4 0))
939 (label :field (byte 8 8) :type 'displacement))
941 (sb!disassem:define-instruction-format (near-cond-jump 16)
942 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
943 (cc :field (byte 4 8) :type 'condition-code)
944 ;; The disassembler currently doesn't let you have an instruction > 32 bits
945 ;; long, so we fake it by using a prefilter to read the offset.
946 (label :type 'displacement
947 :prefilter (lambda (value dstate)
948 (declare (ignore value)) ; always nil anyway
949 (sb!disassem:read-signed-suffix 32 dstate))))
951 (sb!disassem:define-instruction-format (near-jump 8
952 :default-printer '(:name :tab label))
953 (op :field (byte 8 0))
954 ;; The disassembler currently doesn't let you have an instruction > 32 bits
955 ;; long, so we fake it by using a prefilter to read the address.
956 (label :type 'displacement
957 :prefilter (lambda (value dstate)
958 (declare (ignore value)) ; always nil anyway
959 (sb!disassem:read-signed-suffix 32 dstate))))
962 (sb!disassem:define-instruction-format (cond-set 24
963 :default-printer '('set cc :tab reg/mem))
964 (prefix :field (byte 8 0) :value #b00001111)
965 (op :field (byte 4 12) :value #b1001)
966 (cc :field (byte 4 8) :type 'condition-code)
967 (reg/mem :fields (list (byte 2 22) (byte 3 16))
968 :type 'sized-byte-reg/mem)
969 (reg :field (byte 3 19) :value #b000))
971 (sb!disassem:define-instruction-format (cond-move 24
973 '('cmov cc :tab reg ", " reg/mem))
974 (prefix :field (byte 8 0) :value #b00001111)
975 (op :field (byte 4 12) :value #b0100)
976 (cc :field (byte 4 8) :type 'condition-code)
977 (reg/mem :fields (list (byte 2 22) (byte 3 16))
979 (reg :field (byte 3 19) :type 'reg))
981 (sb!disassem:define-instruction-format (enter-format 32
982 :default-printer '(:name
984 (:unless (:constant 0)
986 (op :field (byte 8 0))
987 (disp :field (byte 16 8))
988 (level :field (byte 8 24)))
990 ;;; Single byte instruction with an immediate byte argument.
991 (sb!disassem:define-instruction-format (byte-imm 16
992 :default-printer '(:name :tab code))
993 (op :field (byte 8 0))
994 (code :field (byte 8 8)))
996 ;;; Two byte instruction with an immediate byte argument.
998 (sb!disassem:define-instruction-format (word-imm 24
999 :default-printer '(:name :tab code))
1000 (op :field (byte 16 0))
1001 (code :field (byte 8 16)))
1004 ;;;; primitive emitters
1006 (define-bitfield-emitter emit-word 16
1009 (define-bitfield-emitter emit-dword 32
1012 ;;; Most uses of dwords are as displacements or as immediate values in
1013 ;;; 64-bit operations. In these cases they are sign-extended to 64 bits.
1014 ;;; EMIT-DWORD is unsuitable there because it accepts values of type
1015 ;;; (OR (SIGNED-BYTE 32) (UNSIGNED-BYTE 32)), so we provide a more
1016 ;;; restricted emitter here.
1017 (defun emit-signed-dword (segment value)
1018 (declare (type segment segment)
1019 (type (signed-byte 32) value))
1020 (declare (inline emit-dword))
1021 (emit-dword segment value))
1023 (define-bitfield-emitter emit-qword 64
1026 (define-bitfield-emitter emit-byte-with-reg 8
1027 (byte 5 3) (byte 3 0))
1029 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
1030 (byte 2 6) (byte 3 3) (byte 3 0))
1032 (define-bitfield-emitter emit-sib-byte 8
1033 (byte 2 6) (byte 3 3) (byte 3 0))
1035 (define-bitfield-emitter emit-rex-byte 8
1036 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1042 (defun emit-absolute-fixup (segment fixup &optional quad-p)
1043 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
1044 (let ((offset (fixup-offset fixup)))
1045 (if (label-p offset)
1046 (emit-back-patch segment
1048 (lambda (segment posn)
1049 (declare (ignore posn))
1050 (let ((val (- (+ (component-header-length)
1051 (or (label-position offset)
1053 other-pointer-lowtag)))
1055 (emit-qword segment val)
1056 (emit-signed-dword segment val)))))
1058 (emit-qword segment (or offset 0))
1059 (emit-signed-dword segment (or offset 0))))))
1061 (defun emit-relative-fixup (segment fixup)
1062 (note-fixup segment :relative fixup)
1063 (emit-signed-dword segment (or (fixup-offset fixup) 0)))
1066 ;;;; the effective-address (ea) structure
1068 (defun reg-tn-encoding (tn)
1069 (declare (type tn tn))
1070 ;; ea only has space for three bits of register number: regs r8
1071 ;; and up are selected by a REX prefix byte which caller is responsible
1072 ;; for having emitted where necessary already
1073 (ecase (sb-name (sc-sb (tn-sc tn)))
1075 (let ((offset (mod (tn-offset tn) 16)))
1076 (logior (ash (logand offset 1) 2)
1079 (mod (tn-offset tn) 8))))
1081 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1083 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1084 ;; can't actually emit it on its own: caller also needs to emit REX
1086 (size nil :type (member :byte :word :dword :qword))
1087 (base nil :type (or tn null))
1088 (index nil :type (or tn null))
1089 (scale 1 :type (member 1 2 4 8))
1090 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1091 (def!method print-object ((ea ea) stream)
1092 (cond ((or *print-escape* *print-readably*)
1093 (print-unreadable-object (ea stream :type t)
1095 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1099 (let ((scale (ea-scale ea)))
1100 (if (= scale 1) nil scale))
1103 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1105 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1107 (write-string "+" stream)))
1109 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1110 (unless (= (ea-scale ea) 1)
1111 (format stream "*~A" (ea-scale ea)))
1112 (typecase (ea-disp ea)
1115 (format stream "~@D" (ea-disp ea)))
1117 (format stream "+~A" (ea-disp ea))))
1118 (write-char #\] stream))))
1120 (defun emit-constant-tn-rip (segment constant-tn reg remaining-bytes)
1121 ;; AMD64 doesn't currently have a code object register to use as a
1122 ;; base register for constant access. Instead we use RIP-relative
1123 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1124 ;; is passed to the backpatch callback. In addition we need the offset
1125 ;; from the start of the function header to the slot in the CODE-HEADER
1126 ;; that stores the constant. Since we don't know where the code header
1127 ;; starts, instead count backwards from the function header.
1128 (let* ((2comp (component-info *component-being-compiled*))
1129 (constants (ir2-component-constants 2comp))
1130 (len (length constants))
1131 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1132 ;; If there are an even amount of constants, there will be
1133 ;; an extra qword of padding before the function header, which
1134 ;; needs to be adjusted for. XXX: This will break if new slots
1135 ;; are added to the code header.
1136 (offset (* (- (+ len (if (evenp len)
1139 (tn-offset constant-tn))
1141 ;; RIP-relative addressing
1142 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1143 (emit-back-patch segment
1145 (lambda (segment posn)
1146 ;; The addressing is relative to end of instruction,
1147 ;; i.e. the end of this dword. Hence the + 4.
1148 (emit-signed-dword segment
1149 (+ 4 remaining-bytes
1150 (- (+ offset posn)))))))
1153 (defun emit-label-rip (segment fixup reg remaining-bytes)
1154 (let ((label (fixup-offset fixup)))
1155 ;; RIP-relative addressing
1156 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1157 (emit-back-patch segment
1159 (lambda (segment posn)
1160 (emit-signed-dword segment
1161 (- (label-position label)
1162 (+ posn 4 remaining-bytes))))))
1165 (defun emit-ea (segment thing reg &key allow-constants (remaining-bytes 0))
1168 ;; this would be eleganter if we had a function that would create
1170 (ecase (sb-name (sc-sb (tn-sc thing)))
1171 ((registers float-registers)
1172 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1174 ;; Convert stack tns into an index off RBP.
1175 (let ((disp (frame-byte-offset (tn-offset thing))))
1176 (cond ((<= -128 disp 127)
1177 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1178 (emit-byte segment disp))
1180 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1181 (emit-signed-dword segment disp)))))
1183 (unless allow-constants
1186 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1187 (emit-constant-tn-rip segment thing reg remaining-bytes))))
1189 (let* ((base (ea-base thing))
1190 (index (ea-index thing))
1191 (scale (ea-scale thing))
1192 (disp (ea-disp thing))
1193 (mod (cond ((or (null base)
1195 (not (= (reg-tn-encoding base) #b101))))
1197 ((and (fixnump disp) (<= -128 disp 127))
1201 (r/m (cond (index #b100)
1203 (t (reg-tn-encoding base)))))
1204 (when (and (fixup-p disp)
1205 (label-p (fixup-offset disp)))
1208 (return-from emit-ea (emit-ea segment disp reg
1209 :allow-constants allow-constants
1210 :remaining-bytes remaining-bytes)))
1211 (when (and (= mod 0) (= r/m #b101))
1212 ;; this is rip-relative in amd64, so we'll use a sib instead
1213 (setf r/m #b100 scale 1))
1214 (emit-mod-reg-r/m-byte segment mod reg r/m)
1216 (let ((ss (1- (integer-length scale)))
1217 (index (if (null index)
1219 (let ((index (reg-tn-encoding index)))
1221 (error "can't index off of ESP")
1223 (base (if (null base)
1225 (reg-tn-encoding base))))
1226 (emit-sib-byte segment ss index base)))
1228 (emit-byte segment disp))
1229 ((or (= mod #b10) (null base))
1231 (emit-absolute-fixup segment disp)
1232 (emit-signed-dword segment disp))))))
1234 (typecase (fixup-offset thing)
1236 (emit-label-rip segment thing reg remaining-bytes))
1238 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1239 (emit-sib-byte segment 0 #b100 #b101)
1240 (emit-absolute-fixup segment thing))))))
1242 (defun byte-reg-p (thing)
1244 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1245 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1248 (defun byte-ea-p (thing)
1250 (ea (eq (ea-size thing) :byte))
1252 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1255 (defun word-reg-p (thing)
1257 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1258 (member (sc-name (tn-sc thing)) *word-sc-names*)
1261 (defun word-ea-p (thing)
1263 (ea (eq (ea-size thing) :word))
1264 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1267 (defun dword-reg-p (thing)
1269 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1270 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1273 (defun dword-ea-p (thing)
1275 (ea (eq (ea-size thing) :dword))
1277 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1280 (defun qword-reg-p (thing)
1282 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1283 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1286 (defun qword-ea-p (thing)
1288 (ea (eq (ea-size thing) :qword))
1290 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1293 ;;; Return true if THING is a general-purpose register TN.
1294 (defun register-p (thing)
1296 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1298 (defun accumulator-p (thing)
1299 (and (register-p thing)
1300 (= (tn-offset thing) 0)))
1302 ;;; Return true if THING is an XMM register TN.
1303 (defun xmm-register-p (thing)
1305 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1310 (def!constant +operand-size-prefix-byte+ #b01100110)
1312 (defun maybe-emit-operand-size-prefix (segment size)
1313 (unless (or (eq size :byte)
1314 (eq size :qword) ; REX prefix handles this
1315 (eq size +default-operand-size+))
1316 (emit-byte segment +operand-size-prefix-byte+)))
1318 ;;; A REX prefix must be emitted if at least one of the following
1319 ;;; conditions is true:
1320 ;; 1. The operand size is :QWORD and the default operand size of the
1321 ;; instruction is not :QWORD.
1322 ;;; 2. The instruction references an extended register.
1323 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1326 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1327 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1328 ;;; this should not happen, for example because the instruction's
1329 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1330 ;;; registers the encodings of which are extended with the REX.R, REX.X
1331 ;;; and REX.B bit, respectively. To determine whether one of the byte
1332 ;;; registers is used that can only be accessed using a REX prefix, we
1333 ;;; need only to test R and B, because X is only used for the index
1334 ;;; register of an effective address and therefore never byte-sized.
1335 ;;; For R we can avoid to calculate the size of the TN because it is
1336 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1337 ;;; B can be address-sized (if it is the base register of an effective
1338 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1339 ;;; registers) or of some different size (in the instructions that
1340 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1341 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1342 ;;; between general-purpose and floating point registers for this cause
1343 ;;; because only general-purpose registers can be byte-sized at all.
1344 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1345 (declare (type (member nil :byte :word :dword :qword :do-not-set)
1347 (type (or null tn) r x b))
1349 (if (and r (> (tn-offset r)
1350 ;; offset of r8 is 16, offset of xmm8 is 8
1351 (if (eq (sb-name (sc-sb (tn-sc r)))
1358 ;; Assuming R is a TN describing a general-purpose
1359 ;; register, return true if it references register
1361 (<= 8 (tn-offset r) 15)))
1362 (let ((rex-w (if (eq operand-size :qword) 1 0))
1366 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1368 (eq operand-size :byte)
1371 (eq (operand-size b) :byte)
1373 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1375 ;;; Emit a REX prefix if necessary. The operand size is determined from
1376 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1377 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1378 ;;; pass its index and base registers, if it is a register TN, we pass
1380 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1381 ;;; be treated specially here: If THING is a stack TN, neither it nor
1382 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1383 ;;; works correctly because stack references always use RBP as the base
1384 ;;; register and never use an index register so no extended registers
1385 ;;; need to be accessed. Fixups are assembled using an addressing mode
1386 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1387 ;;; not reference an extended register. The displacement-only addressing
1388 ;;; mode requires that REX.X is 0, which is ensured here.
1389 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1390 (declare (type (or ea tn fixup) thing)
1391 (type (or null tn) reg)
1392 (type (member nil :byte :word :dword :qword :do-not-set)
1394 (let ((ea-p (ea-p thing)))
1395 (maybe-emit-rex-prefix segment
1396 (or operand-size (operand-size thing))
1398 (and ea-p (ea-index thing))
1399 (cond (ea-p (ea-base thing))
1401 (member (sb-name (sc-sb (tn-sc thing)))
1402 '(float-registers registers)))
1406 (defun operand-size (thing)
1409 ;; FIXME: might as well be COND instead of having to use #. readmacro
1410 ;; to hack up the code
1411 (case (sc-name (tn-sc thing))
1420 ;; added by jrd: float-registers is a separate size (?)
1421 ;; The only place in the code where we are called with THING
1422 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1423 ;; checks whether THING is a byte register. Thus our result in
1424 ;; these cases could as well be :dword and :qword. I leave it as
1425 ;; :float and :double which is more likely to trigger an aver
1426 ;; instead of silently doing the wrong thing in case this
1427 ;; situation should change. Lutz Euler, 2005-10-23.
1430 (#.*double-sc-names*
1432 (#.*complex-sc-names*
1435 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1439 ;; GNA. Guess who spelt "flavor" correctly first time round?
1440 ;; There's a strong argument in my mind to change all uses of
1441 ;; "flavor" to "kind": and similarly with some misguided uses of
1442 ;; "type" here and there. -- CSR, 2005-01-06.
1443 (case (fixup-flavor thing)
1444 ((:foreign-dataref) :qword)))
1448 (defun matching-operand-size (dst src)
1449 (let ((dst-size (operand-size dst))
1450 (src-size (operand-size src)))
1453 (if (eq dst-size src-size)
1455 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1456 dst dst-size src src-size))
1460 (error "can't tell the size of either ~S or ~S" dst src)))))
1462 ;;; Except in a very few cases (MOV instructions A1, A3 and B8 - BF)
1463 ;;; we expect dword data bytes even when 64 bit work is being done.
1464 ;;; But A1 and A3 are currently unused and B8 - BF use EMIT-QWORD
1465 ;;; directly, so we emit all quad constants as dwords, additionally
1466 ;;; making sure that they survive the sign-extension to 64 bits
1468 (defun emit-sized-immediate (segment size value)
1471 (emit-byte segment value))
1473 (emit-word segment value))
1475 (emit-dword segment value))
1477 (emit-signed-dword segment value))))
1481 (define-instruction rex (segment)
1482 (:printer rex () nil :print-name nil)
1484 (bug "REX prefix used as a standalone instruction")))
1486 (define-instruction x66 (segment)
1487 (:printer x66 () nil :print-name nil)
1489 (bug "#X66 prefix used as a standalone instruction")))
1491 (defun emit-prefix (segment name)
1492 (declare (ignorable segment))
1497 (emit-byte segment #xf0))))
1499 (define-instruction lock (segment)
1500 (:printer byte ((op #b11110000)) nil)
1502 (bug "LOCK prefix used as a standalone instruction")))
1504 (define-instruction rep (segment)
1506 (emit-byte segment #b11110011)))
1508 (define-instruction repe (segment)
1509 (:printer byte ((op #b11110011)) nil)
1511 (emit-byte segment #b11110011)))
1513 (define-instruction repne (segment)
1514 (:printer byte ((op #b11110010)) nil)
1516 (emit-byte segment #b11110010)))
1518 ;;;; general data transfer
1520 ;;; This is the part of the MOV instruction emitter that does moving
1521 ;;; of an immediate value into a qword register. We go to some length
1522 ;;; to achieve the shortest possible encoding.
1523 (defun emit-immediate-move-to-qword-register (segment dst src)
1524 (declare (type integer src))
1525 (cond ((typep src '(unsigned-byte 32))
1526 ;; We use the B8 - BF encoding with an operand size of 32 bits
1527 ;; here and let the implicit zero-extension fill the upper half
1528 ;; of the 64-bit destination register. Instruction size: five
1529 ;; or six bytes. (A REX prefix will be emitted only if the
1530 ;; destination is an extended register.)
1531 (maybe-emit-rex-prefix segment :dword nil nil dst)
1532 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1533 (emit-dword segment src))
1535 (maybe-emit-rex-prefix segment :qword nil nil dst)
1536 (cond ((typep src '(signed-byte 32))
1537 ;; Use the C7 encoding that takes a 32-bit immediate and
1538 ;; sign-extends it to 64 bits. Instruction size: seven
1540 (emit-byte segment #b11000111)
1541 (emit-mod-reg-r/m-byte segment #b11 #b000
1542 (reg-tn-encoding dst))
1543 (emit-signed-dword segment src))
1544 ((<= (- (expt 2 64) (expt 2 31))
1547 ;; This triggers on positive integers of 64 bits length
1548 ;; with the most significant 33 bits being 1. We use the
1549 ;; same encoding as in the previous clause.
1550 (emit-byte segment #b11000111)
1551 (emit-mod-reg-r/m-byte segment #b11 #b000
1552 (reg-tn-encoding dst))
1553 (emit-signed-dword segment (- src (expt 2 64))))
1555 ;; We need a full 64-bit immediate. Instruction size:
1557 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1558 (emit-qword segment src))))))
1560 (define-instruction mov (segment dst src)
1561 ;; immediate to register
1562 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1563 '(:name :tab reg ", " imm))
1564 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1565 '(:name :tab reg ", " imm))
1566 ;; absolute mem to/from accumulator
1567 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1568 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1569 ;; register to/from register/memory
1570 (:printer reg-reg/mem-dir ((op #b100010)))
1571 ;; immediate to register/memory
1572 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1575 (let ((size (matching-operand-size dst src)))
1576 (maybe-emit-operand-size-prefix segment size)
1577 (cond ((register-p dst)
1578 (cond ((integerp src)
1579 (cond ((eq size :qword)
1580 (emit-immediate-move-to-qword-register segment
1583 (maybe-emit-rex-prefix segment size nil nil dst)
1584 (emit-byte-with-reg segment
1588 (reg-tn-encoding dst))
1589 (emit-sized-immediate segment size src))))
1591 (maybe-emit-rex-for-ea segment src dst)
1596 (emit-ea segment src (reg-tn-encoding dst) :allow-constants t))))
1598 ;; C7 only deals with 32 bit immediates even if the
1599 ;; destination is a 64-bit location. The value is
1600 ;; sign-extended in this case.
1601 (maybe-emit-rex-for-ea segment dst nil)
1602 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
1603 (emit-ea segment dst #b000)
1604 (emit-sized-immediate segment size src))
1606 (maybe-emit-rex-for-ea segment dst src)
1607 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1608 (emit-ea segment dst (reg-tn-encoding src)))
1610 ;; Generally we can't MOV a fixupped value into an EA, since
1611 ;; MOV on non-registers can only take a 32-bit immediate arg.
1612 ;; Make an exception for :FOREIGN fixups (pretty much just
1613 ;; the runtime asm, since other foreign calls go through the
1614 ;; the linkage table) and for linkage table references, since
1615 ;; these should always end up in low memory.
1616 (aver (or (eq (fixup-flavor src) :foreign)
1617 (eq (fixup-flavor src) :foreign-dataref)
1618 (eq (ea-size dst) :dword)))
1619 (maybe-emit-rex-for-ea segment dst nil)
1620 (emit-byte segment #b11000111)
1621 (emit-ea segment dst #b000)
1622 (emit-absolute-fixup segment src))
1624 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1626 ;;; Emit a sign-extending (if SIGNED-P is true) or zero-extending move.
1627 ;;; To achieve the shortest possible encoding zero extensions into a
1628 ;;; 64-bit destination are assembled as a straight 32-bit MOV (if the
1629 ;;; source size is 32 bits) or as MOVZX with a 32-bit destination (if
1630 ;;; the source size is 8 or 16 bits). Due to the implicit zero extension
1631 ;;; to 64 bits this has the same effect as a MOVZX with 64-bit
1632 ;;; destination but often needs no REX prefix.
1633 (defun emit-move-with-extension (segment dst src signed-p)
1634 (aver (register-p dst))
1635 (let ((dst-size (operand-size dst))
1636 (src-size (operand-size src))
1637 (opcode (if signed-p #b10111110 #b10110110)))
1638 (macrolet ((emitter (operand-size &rest bytes)
1640 (maybe-emit-rex-for-ea segment src dst
1641 :operand-size ,operand-size)
1642 ,@(mapcar (lambda (byte)
1643 `(emit-byte segment ,byte))
1645 (emit-ea segment src (reg-tn-encoding dst)))))
1648 (aver (eq src-size :byte))
1649 (maybe-emit-operand-size-prefix segment :word)
1650 (emitter :word #b00001111 opcode))
1653 (setf dst-size :dword))
1656 (emitter dst-size #b00001111 opcode))
1658 (emitter dst-size #b00001111 (logior opcode 1)))
1660 (aver (or (not signed-p) (eq dst-size :qword)))
1662 (if signed-p #x63 #x8b))))))))) ; movsxd or straight mov
1664 (define-instruction movsx (segment dst src)
1665 (:printer ext-reg-reg/mem-no-width
1666 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1667 (:printer ext-reg-reg/mem-no-width
1668 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1669 (:emitter (emit-move-with-extension segment dst src :signed)))
1671 (define-instruction movzx (segment dst src)
1672 (:printer ext-reg-reg/mem-no-width
1673 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1674 (:printer ext-reg-reg/mem-no-width
1675 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1676 (:emitter (emit-move-with-extension segment dst src nil)))
1678 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1679 ;;; sign-extends the dword source into the qword destination register.
1680 ;;; If the operand size is :dword the instruction zero-extends the dword
1681 ;;; source into the qword destination register, i.e. it does the same as
1682 ;;; a dword MOV into a register.
1683 (define-instruction movsxd (segment dst src)
1684 (:printer reg-reg/mem ((op #b0110001) (width 1)
1685 (reg/mem nil :type 'sized-dword-reg/mem)))
1686 (:emitter (emit-move-with-extension segment dst src :signed)))
1688 ;;; this is not a real amd64 instruction, of course
1689 (define-instruction movzxd (segment dst src)
1690 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1691 (:emitter (emit-move-with-extension segment dst src nil)))
1693 (define-instruction push (segment src)
1695 (:printer reg-no-width-default-qword ((op #b01010)))
1697 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1699 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1701 (:printer byte ((op #b01101000)
1702 (imm nil :type 'signed-imm-data-default-qword))
1704 ;; ### segment registers?
1707 (cond ((integerp src)
1708 (cond ((<= -128 src 127)
1709 (emit-byte segment #b01101010)
1710 (emit-byte segment src))
1712 ;; A REX-prefix is not needed because the operand size
1713 ;; defaults to 64 bits. The size of the immediate is 32
1714 ;; bits and it is sign-extended.
1715 (emit-byte segment #b01101000)
1716 (emit-signed-dword segment src))))
1718 (let ((size (operand-size src)))
1719 (aver (or (eq size :qword) (eq size :word)))
1720 (maybe-emit-operand-size-prefix segment size)
1721 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1722 (cond ((register-p src)
1723 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1725 (emit-byte segment #b11111111)
1726 (emit-ea segment src #b110 :allow-constants t))))))))
1728 (define-instruction pop (segment dst)
1729 (:printer reg-no-width-default-qword ((op #b01011)))
1730 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1732 (let ((size (operand-size dst)))
1733 (aver (or (eq size :qword) (eq size :word)))
1734 (maybe-emit-operand-size-prefix segment size)
1735 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1736 (cond ((register-p dst)
1737 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1739 (emit-byte segment #b10001111)
1740 (emit-ea segment dst #b000))))))
1742 (define-instruction xchg (segment operand1 operand2)
1743 ;; Register with accumulator.
1744 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1745 ;; Register/Memory with Register.
1746 (:printer reg-reg/mem ((op #b1000011)))
1748 (let ((size (matching-operand-size operand1 operand2)))
1749 (maybe-emit-operand-size-prefix segment size)
1750 (labels ((xchg-acc-with-something (acc something)
1751 (if (and (not (eq size :byte)) (register-p something))
1753 (maybe-emit-rex-for-ea segment acc something)
1754 (emit-byte-with-reg segment
1756 (reg-tn-encoding something)))
1757 (xchg-reg-with-something acc something)))
1758 (xchg-reg-with-something (reg something)
1759 (maybe-emit-rex-for-ea segment something reg)
1760 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1761 (emit-ea segment something (reg-tn-encoding reg))))
1762 (cond ((accumulator-p operand1)
1763 (xchg-acc-with-something operand1 operand2))
1764 ((accumulator-p operand2)
1765 (xchg-acc-with-something operand2 operand1))
1766 ((register-p operand1)
1767 (xchg-reg-with-something operand1 operand2))
1768 ((register-p operand2)
1769 (xchg-reg-with-something operand2 operand1))
1771 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1773 (define-instruction lea (segment dst src)
1774 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1776 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1777 (maybe-emit-rex-for-ea segment src dst
1778 :operand-size :qword)
1779 (emit-byte segment #b10001101)
1780 (emit-ea segment src (reg-tn-encoding dst))))
1782 (define-instruction cmpxchg (segment dst src &optional prefix)
1783 ;; Register/Memory with Register.
1784 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1786 (aver (register-p src))
1787 (emit-prefix segment prefix)
1788 (let ((size (matching-operand-size src dst)))
1789 (maybe-emit-operand-size-prefix segment size)
1790 (maybe-emit-rex-for-ea segment dst src)
1791 (emit-byte segment #b00001111)
1792 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1793 (emit-ea segment dst (reg-tn-encoding src)))))
1796 ;;;; flag control instructions
1798 ;;; CLC -- Clear Carry Flag.
1799 (define-instruction clc (segment)
1800 (:printer byte ((op #b11111000)))
1802 (emit-byte segment #b11111000)))
1804 ;;; CLD -- Clear Direction Flag.
1805 (define-instruction cld (segment)
1806 (:printer byte ((op #b11111100)))
1808 (emit-byte segment #b11111100)))
1810 ;;; CLI -- Clear Iterrupt Enable Flag.
1811 (define-instruction cli (segment)
1812 (:printer byte ((op #b11111010)))
1814 (emit-byte segment #b11111010)))
1816 ;;; CMC -- Complement Carry Flag.
1817 (define-instruction cmc (segment)
1818 (:printer byte ((op #b11110101)))
1820 (emit-byte segment #b11110101)))
1822 ;;; LAHF -- Load AH into flags.
1823 (define-instruction lahf (segment)
1824 (:printer byte ((op #b10011111)))
1826 (emit-byte segment #b10011111)))
1828 ;;; POPF -- Pop flags.
1829 (define-instruction popf (segment)
1830 (:printer byte ((op #b10011101)))
1832 (emit-byte segment #b10011101)))
1834 ;;; PUSHF -- push flags.
1835 (define-instruction pushf (segment)
1836 (:printer byte ((op #b10011100)))
1838 (emit-byte segment #b10011100)))
1840 ;;; SAHF -- Store AH into flags.
1841 (define-instruction sahf (segment)
1842 (:printer byte ((op #b10011110)))
1844 (emit-byte segment #b10011110)))
1846 ;;; STC -- Set Carry Flag.
1847 (define-instruction stc (segment)
1848 (:printer byte ((op #b11111001)))
1850 (emit-byte segment #b11111001)))
1852 ;;; STD -- Set Direction Flag.
1853 (define-instruction std (segment)
1854 (:printer byte ((op #b11111101)))
1856 (emit-byte segment #b11111101)))
1858 ;;; STI -- Set Interrupt Enable Flag.
1859 (define-instruction sti (segment)
1860 (:printer byte ((op #b11111011)))
1862 (emit-byte segment #b11111011)))
1866 (defun emit-random-arith-inst (name segment dst src opcode
1867 &optional allow-constants)
1868 (let ((size (matching-operand-size dst src)))
1869 (maybe-emit-operand-size-prefix segment size)
1872 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1873 (maybe-emit-rex-for-ea segment dst nil)
1874 (emit-byte segment #b10000011)
1875 (emit-ea segment dst opcode :allow-constants allow-constants)
1876 (emit-byte segment src))
1877 ((accumulator-p dst)
1878 (maybe-emit-rex-for-ea segment dst nil)
1885 (emit-sized-immediate segment size src))
1887 (maybe-emit-rex-for-ea segment dst nil)
1888 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1889 (emit-ea segment dst opcode :allow-constants allow-constants)
1890 (emit-sized-immediate segment size src))))
1892 (maybe-emit-rex-for-ea segment dst src)
1896 (if (eq size :byte) #b00000000 #b00000001)))
1897 (emit-ea segment dst (reg-tn-encoding src) :allow-constants allow-constants))
1899 (maybe-emit-rex-for-ea segment src dst)
1903 (if (eq size :byte) #b00000010 #b00000011)))
1904 (emit-ea segment src (reg-tn-encoding dst) :allow-constants allow-constants))
1906 (error "bogus operands to ~A" name)))))
1908 (eval-when (:compile-toplevel :execute)
1909 (defun arith-inst-printer-list (subop)
1910 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1911 (reg/mem-imm ((op (#b1000000 ,subop))))
1912 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1913 ;; therefore we force WIDTH to 1.
1914 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1915 (imm nil :type signed-imm-byte)))
1916 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000)))))))
1918 (define-instruction add (segment dst src &optional prefix)
1919 (:printer-list (arith-inst-printer-list #b000))
1921 (emit-prefix segment prefix)
1922 (emit-random-arith-inst "ADD" segment dst src #b000)))
1924 (define-instruction adc (segment dst src)
1925 (:printer-list (arith-inst-printer-list #b010))
1926 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1928 (define-instruction sub (segment dst src)
1929 (:printer-list (arith-inst-printer-list #b101))
1930 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1932 (define-instruction sbb (segment dst src)
1933 (:printer-list (arith-inst-printer-list #b011))
1934 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1936 (define-instruction cmp (segment dst src)
1937 (:printer-list (arith-inst-printer-list #b111))
1938 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1940 ;;; The one-byte encodings for INC and DEC are used as REX prefixes
1941 ;;; in 64-bit mode so we always use the two-byte form.
1942 (define-instruction inc (segment dst)
1943 (:printer reg/mem ((op '(#b1111111 #b000))))
1945 (let ((size (operand-size dst)))
1946 (maybe-emit-operand-size-prefix segment size)
1947 (maybe-emit-rex-for-ea segment dst nil)
1948 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1949 (emit-ea segment dst #b000))))
1951 (define-instruction dec (segment dst)
1952 (:printer reg/mem ((op '(#b1111111 #b001))))
1954 (let ((size (operand-size dst)))
1955 (maybe-emit-operand-size-prefix segment size)
1956 (maybe-emit-rex-for-ea segment dst nil)
1957 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1958 (emit-ea segment dst #b001))))
1960 (define-instruction neg (segment dst)
1961 (:printer reg/mem ((op '(#b1111011 #b011))))
1963 (let ((size (operand-size dst)))
1964 (maybe-emit-operand-size-prefix segment size)
1965 (maybe-emit-rex-for-ea segment dst nil)
1966 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1967 (emit-ea segment dst #b011))))
1969 (define-instruction mul (segment dst src)
1970 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1972 (let ((size (matching-operand-size dst src)))
1973 (aver (accumulator-p dst))
1974 (maybe-emit-operand-size-prefix segment size)
1975 (maybe-emit-rex-for-ea segment src nil)
1976 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1977 (emit-ea segment src #b100))))
1979 (define-instruction imul (segment dst &optional src1 src2)
1980 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1981 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
1982 (:printer reg-reg/mem ((op #b0110100) (width 1)
1983 (imm nil :type 'signed-imm-data))
1984 '(:name :tab reg ", " reg/mem ", " imm))
1985 (:printer reg-reg/mem ((op #b0110101) (width 1)
1986 (imm nil :type 'signed-imm-byte))
1987 '(:name :tab reg ", " reg/mem ", " imm))
1989 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1990 (let* ((size (matching-operand-size reg r/m))
1991 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1992 (maybe-emit-operand-size-prefix segment size)
1993 (maybe-emit-rex-for-ea segment r/m reg)
1994 (emit-byte segment (if sx #b01101011 #b01101001))
1995 (emit-ea segment r/m (reg-tn-encoding reg))
1997 (emit-byte segment immed)
1998 (emit-sized-immediate segment size immed)))))
2000 (r/m-with-immed-to-reg dst src1 src2))
2003 (r/m-with-immed-to-reg dst dst src1)
2004 (let ((size (matching-operand-size dst src1)))
2005 (maybe-emit-operand-size-prefix segment size)
2006 (maybe-emit-rex-for-ea segment src1 dst)
2007 (emit-byte segment #b00001111)
2008 (emit-byte segment #b10101111)
2009 (emit-ea segment src1 (reg-tn-encoding dst)))))
2011 (let ((size (operand-size dst)))
2012 (maybe-emit-operand-size-prefix segment size)
2013 (maybe-emit-rex-for-ea segment dst nil)
2014 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2015 (emit-ea segment dst #b101)))))))
2017 (define-instruction div (segment dst src)
2018 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
2020 (let ((size (matching-operand-size dst src)))
2021 (aver (accumulator-p dst))
2022 (maybe-emit-operand-size-prefix segment size)
2023 (maybe-emit-rex-for-ea segment src nil)
2024 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2025 (emit-ea segment src #b110))))
2027 (define-instruction idiv (segment dst src)
2028 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
2030 (let ((size (matching-operand-size dst src)))
2031 (aver (accumulator-p dst))
2032 (maybe-emit-operand-size-prefix segment size)
2033 (maybe-emit-rex-for-ea segment src nil)
2034 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2035 (emit-ea segment src #b111))))
2037 (define-instruction bswap (segment dst)
2038 (:printer ext-reg-no-width ((op #b11001)))
2040 (let ((size (operand-size dst)))
2041 (maybe-emit-rex-prefix segment size nil nil dst)
2042 (emit-byte segment #x0f)
2043 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
2045 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2046 (define-instruction cbw (segment)
2047 (:printer x66-byte ((op #b10011000)))
2049 (maybe-emit-operand-size-prefix segment :word)
2050 (emit-byte segment #b10011000)))
2052 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2053 (define-instruction cwde (segment)
2054 (:printer byte ((op #b10011000)))
2056 (maybe-emit-operand-size-prefix segment :dword)
2057 (emit-byte segment #b10011000)))
2059 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2060 (define-instruction cdqe (segment)
2061 (:printer rex-byte ((op #b10011000)))
2063 (maybe-emit-rex-prefix segment :qword nil nil nil)
2064 (emit-byte segment #b10011000)))
2066 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2067 (define-instruction cwd (segment)
2068 (:printer x66-byte ((op #b10011001)))
2070 (maybe-emit-operand-size-prefix segment :word)
2071 (emit-byte segment #b10011001)))
2073 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2074 (define-instruction cdq (segment)
2075 (:printer byte ((op #b10011001)))
2077 (maybe-emit-operand-size-prefix segment :dword)
2078 (emit-byte segment #b10011001)))
2080 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2081 (define-instruction cqo (segment)
2082 (:printer rex-byte ((op #b10011001)))
2084 (maybe-emit-rex-prefix segment :qword nil nil nil)
2085 (emit-byte segment #b10011001)))
2087 (define-instruction xadd (segment dst src &optional prefix)
2088 ;; Register/Memory with Register.
2089 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
2091 (aver (register-p src))
2092 (emit-prefix segment prefix)
2093 (let ((size (matching-operand-size src dst)))
2094 (maybe-emit-operand-size-prefix segment size)
2095 (maybe-emit-rex-for-ea segment dst src)
2096 (emit-byte segment #b00001111)
2097 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2098 (emit-ea segment dst (reg-tn-encoding src)))))
2103 (defun emit-shift-inst (segment dst amount opcode)
2104 (let ((size (operand-size dst)))
2105 (maybe-emit-operand-size-prefix segment size)
2106 (multiple-value-bind (major-opcode immed)
2108 (:cl (values #b11010010 nil))
2109 (1 (values #b11010000 nil))
2110 (t (values #b11000000 t)))
2111 (maybe-emit-rex-for-ea segment dst nil)
2113 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2114 (emit-ea segment dst opcode)
2116 (emit-byte segment amount)))))
2118 (eval-when (:compile-toplevel :execute)
2119 (defun shift-inst-printer-list (subop)
2120 `((reg/mem ((op (#b1101000 ,subop)))
2121 (:name :tab reg/mem ", 1"))
2122 (reg/mem ((op (#b1101001 ,subop)))
2123 (:name :tab reg/mem ", " 'cl))
2124 (reg/mem-imm ((op (#b1100000 ,subop))
2125 (imm nil :type imm-byte))))))
2127 (define-instruction rol (segment dst amount)
2129 (shift-inst-printer-list #b000))
2131 (emit-shift-inst segment dst amount #b000)))
2133 (define-instruction ror (segment dst amount)
2135 (shift-inst-printer-list #b001))
2137 (emit-shift-inst segment dst amount #b001)))
2139 (define-instruction rcl (segment dst amount)
2141 (shift-inst-printer-list #b010))
2143 (emit-shift-inst segment dst amount #b010)))
2145 (define-instruction rcr (segment dst amount)
2147 (shift-inst-printer-list #b011))
2149 (emit-shift-inst segment dst amount #b011)))
2151 (define-instruction shl (segment dst amount)
2153 (shift-inst-printer-list #b100))
2155 (emit-shift-inst segment dst amount #b100)))
2157 (define-instruction shr (segment dst amount)
2159 (shift-inst-printer-list #b101))
2161 (emit-shift-inst segment dst amount #b101)))
2163 (define-instruction sar (segment dst amount)
2165 (shift-inst-printer-list #b111))
2167 (emit-shift-inst segment dst amount #b111)))
2169 (defun emit-double-shift (segment opcode dst src amt)
2170 (let ((size (matching-operand-size dst src)))
2171 (when (eq size :byte)
2172 (error "Double shifts can only be used with words."))
2173 (maybe-emit-operand-size-prefix segment size)
2174 (maybe-emit-rex-for-ea segment dst src)
2175 (emit-byte segment #b00001111)
2176 (emit-byte segment (dpb opcode (byte 1 3)
2177 (if (eq amt :cl) #b10100101 #b10100100)))
2178 (emit-ea segment dst (reg-tn-encoding src))
2179 (unless (eq amt :cl)
2180 (emit-byte segment amt))))
2182 (eval-when (:compile-toplevel :execute)
2183 (defun double-shift-inst-printer-list (op)
2184 `((ext-reg-reg/mem-no-width ((op ,(logior op #b100))
2185 (imm nil :type imm-byte)))
2186 (ext-reg-reg/mem-no-width ((op ,(logior op #b101)))
2187 (:name :tab reg/mem ", " reg ", " 'cl)))))
2189 (define-instruction shld (segment dst src amt)
2190 (:declare (type (or (member :cl) (mod 64)) amt))
2191 (:printer-list (double-shift-inst-printer-list #b10100000))
2193 (emit-double-shift segment #b0 dst src amt)))
2195 (define-instruction shrd (segment dst src amt)
2196 (:declare (type (or (member :cl) (mod 64)) amt))
2197 (:printer-list (double-shift-inst-printer-list #b10101000))
2199 (emit-double-shift segment #b1 dst src amt)))
2201 (define-instruction and (segment dst src)
2203 (arith-inst-printer-list #b100))
2205 (emit-random-arith-inst "AND" segment dst src #b100)))
2207 (define-instruction test (segment this that)
2208 (:printer accum-imm ((op #b1010100)))
2209 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2210 (:printer reg-reg/mem ((op #b1000010)))
2212 (let ((size (matching-operand-size this that)))
2213 (maybe-emit-operand-size-prefix segment size)
2214 (flet ((test-immed-and-something (immed something)
2215 (cond ((accumulator-p something)
2216 (maybe-emit-rex-for-ea segment something nil)
2218 (if (eq size :byte) #b10101000 #b10101001))
2219 (emit-sized-immediate segment size immed))
2221 (maybe-emit-rex-for-ea segment something nil)
2223 (if (eq size :byte) #b11110110 #b11110111))
2224 (emit-ea segment something #b000)
2225 (emit-sized-immediate segment size immed))))
2226 (test-reg-and-something (reg something)
2227 (maybe-emit-rex-for-ea segment something reg)
2228 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2229 (emit-ea segment something (reg-tn-encoding reg))))
2230 (cond ((integerp that)
2231 (test-immed-and-something that this))
2233 (test-immed-and-something this that))
2235 (test-reg-and-something this that))
2237 (test-reg-and-something that this))
2239 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2241 (define-instruction or (segment dst src)
2243 (arith-inst-printer-list #b001))
2245 (emit-random-arith-inst "OR" segment dst src #b001)))
2247 (define-instruction xor (segment dst src)
2249 (arith-inst-printer-list #b110))
2251 (emit-random-arith-inst "XOR" segment dst src #b110)))
2253 (define-instruction not (segment dst)
2254 (:printer reg/mem ((op '(#b1111011 #b010))))
2256 (let ((size (operand-size dst)))
2257 (maybe-emit-operand-size-prefix segment size)
2258 (maybe-emit-rex-for-ea segment dst nil)
2259 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2260 (emit-ea segment dst #b010))))
2262 ;;;; string manipulation
2264 (define-instruction cmps (segment size)
2265 (:printer string-op ((op #b1010011)))
2267 (maybe-emit-operand-size-prefix segment size)
2268 (maybe-emit-rex-prefix segment size nil nil nil)
2269 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2271 (define-instruction ins (segment acc)
2272 (:printer string-op ((op #b0110110)))
2274 (let ((size (operand-size acc)))
2275 (aver (accumulator-p acc))
2276 (maybe-emit-operand-size-prefix segment size)
2277 (maybe-emit-rex-prefix segment size nil nil nil)
2278 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2280 (define-instruction lods (segment acc)
2281 (:printer string-op ((op #b1010110)))
2283 (let ((size (operand-size acc)))
2284 (aver (accumulator-p acc))
2285 (maybe-emit-operand-size-prefix segment size)
2286 (maybe-emit-rex-prefix segment size nil nil nil)
2287 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2289 (define-instruction movs (segment size)
2290 (:printer string-op ((op #b1010010)))
2292 (maybe-emit-operand-size-prefix segment size)
2293 (maybe-emit-rex-prefix segment size nil nil nil)
2294 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2296 (define-instruction outs (segment acc)
2297 (:printer string-op ((op #b0110111)))
2299 (let ((size (operand-size acc)))
2300 (aver (accumulator-p acc))
2301 (maybe-emit-operand-size-prefix segment size)
2302 (maybe-emit-rex-prefix segment size nil nil nil)
2303 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2305 (define-instruction scas (segment acc)
2306 (:printer string-op ((op #b1010111)))
2308 (let ((size (operand-size acc)))
2309 (aver (accumulator-p acc))
2310 (maybe-emit-operand-size-prefix segment size)
2311 (maybe-emit-rex-prefix segment size nil nil nil)
2312 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2314 (define-instruction stos (segment acc)
2315 (:printer string-op ((op #b1010101)))
2317 (let ((size (operand-size acc)))
2318 (aver (accumulator-p acc))
2319 (maybe-emit-operand-size-prefix segment size)
2320 (maybe-emit-rex-prefix segment size nil nil nil)
2321 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2323 (define-instruction xlat (segment)
2324 (:printer byte ((op #b11010111)))
2326 (emit-byte segment #b11010111)))
2329 ;;;; bit manipulation
2331 (define-instruction bsf (segment dst src)
2332 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2334 (let ((size (matching-operand-size dst src)))
2335 (when (eq size :byte)
2336 (error "can't scan bytes: ~S" src))
2337 (maybe-emit-operand-size-prefix segment size)
2338 (maybe-emit-rex-for-ea segment src dst)
2339 (emit-byte segment #b00001111)
2340 (emit-byte segment #b10111100)
2341 (emit-ea segment src (reg-tn-encoding dst)))))
2343 (define-instruction bsr (segment dst src)
2344 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2346 (let ((size (matching-operand-size dst src)))
2347 (when (eq size :byte)
2348 (error "can't scan bytes: ~S" src))
2349 (maybe-emit-operand-size-prefix segment size)
2350 (maybe-emit-rex-for-ea segment src dst)
2351 (emit-byte segment #b00001111)
2352 (emit-byte segment #b10111101)
2353 (emit-ea segment src (reg-tn-encoding dst)))))
2355 (defun emit-bit-test-and-mumble (segment src index opcode)
2356 (let ((size (operand-size src)))
2357 (when (eq size :byte)
2358 (error "can't scan bytes: ~S" src))
2359 (maybe-emit-operand-size-prefix segment size)
2360 (cond ((integerp index)
2361 (maybe-emit-rex-for-ea segment src nil)
2362 (emit-byte segment #b00001111)
2363 (emit-byte segment #b10111010)
2364 (emit-ea segment src opcode)
2365 (emit-byte segment index))
2367 (maybe-emit-rex-for-ea segment src index)
2368 (emit-byte segment #b00001111)
2369 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2370 (emit-ea segment src (reg-tn-encoding index))))))
2372 (eval-when (:compile-toplevel :execute)
2373 (defun bit-test-inst-printer-list (subop)
2374 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2375 (reg/mem nil :type reg/mem)
2376 (imm nil :type imm-byte)
2378 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2380 (:name :tab reg/mem ", " reg)))))
2382 (define-instruction bt (segment src index)
2383 (:printer-list (bit-test-inst-printer-list #b100))
2385 (emit-bit-test-and-mumble segment src index #b100)))
2387 (define-instruction btc (segment src index)
2388 (:printer-list (bit-test-inst-printer-list #b111))
2390 (emit-bit-test-and-mumble segment src index #b111)))
2392 (define-instruction btr (segment src index)
2393 (:printer-list (bit-test-inst-printer-list #b110))
2395 (emit-bit-test-and-mumble segment src index #b110)))
2397 (define-instruction bts (segment src index)
2398 (:printer-list (bit-test-inst-printer-list #b101))
2400 (emit-bit-test-and-mumble segment src index #b101)))
2403 ;;;; control transfer
2405 (define-instruction call (segment where)
2406 (:printer near-jump ((op #b11101000)))
2407 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2411 (emit-byte segment #b11101000) ; 32 bit relative
2412 (emit-back-patch segment
2414 (lambda (segment posn)
2415 (emit-signed-dword segment
2416 (- (label-position where)
2419 ;; There is no CALL rel64...
2420 (error "Cannot CALL a fixup: ~S" where))
2422 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2423 (emit-byte segment #b11111111)
2424 (emit-ea segment where #b010)))))
2426 (defun emit-byte-displacement-backpatch (segment target)
2427 (emit-back-patch segment
2429 (lambda (segment posn)
2430 (let ((disp (- (label-position target) (1+ posn))))
2431 (aver (<= -128 disp 127))
2432 (emit-byte segment disp)))))
2434 (define-instruction jmp (segment cond &optional where)
2435 ;; conditional jumps
2436 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2437 (:printer near-cond-jump () '('j cc :tab label))
2438 ;; unconditional jumps
2439 (:printer short-jump ((op #b1011)))
2440 (:printer near-jump ((op #b11101001)))
2441 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2446 (lambda (segment posn delta-if-after)
2447 (let ((disp (- (label-position where posn delta-if-after)
2449 (when (<= -128 disp 127)
2451 (dpb (conditional-opcode cond)
2454 (emit-byte-displacement-backpatch segment where)
2456 (lambda (segment posn)
2457 (let ((disp (- (label-position where) (+ posn 6))))
2458 (emit-byte segment #b00001111)
2460 (dpb (conditional-opcode cond)
2463 (emit-signed-dword segment disp)))))
2464 ((label-p (setq where cond))
2467 (lambda (segment posn delta-if-after)
2468 (let ((disp (- (label-position where posn delta-if-after)
2470 (when (<= -128 disp 127)
2471 (emit-byte segment #b11101011)
2472 (emit-byte-displacement-backpatch segment where)
2474 (lambda (segment posn)
2475 (let ((disp (- (label-position where) (+ posn 5))))
2476 (emit-byte segment #b11101001)
2477 (emit-signed-dword segment disp)))))
2479 (emit-byte segment #b11101001)
2480 (emit-relative-fixup segment where))
2482 (unless (or (ea-p where) (tn-p where))
2483 (error "don't know what to do with ~A" where))
2484 ;; near jump defaults to 64 bit
2485 ;; w-bit in rex prefix is unnecessary
2486 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2487 (emit-byte segment #b11111111)
2488 (emit-ea segment where #b100)))))
2490 (define-instruction ret (segment &optional stack-delta)
2491 (:printer byte ((op #b11000011)))
2492 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2495 (cond ((and stack-delta (not (zerop stack-delta)))
2496 (emit-byte segment #b11000010)
2497 (emit-word segment stack-delta))
2499 (emit-byte segment #b11000011)))))
2501 (define-instruction jrcxz (segment target)
2502 (:printer short-jump ((op #b0011)))
2504 (emit-byte segment #b11100011)
2505 (emit-byte-displacement-backpatch segment target)))
2507 (define-instruction loop (segment target)
2508 (:printer short-jump ((op #b0010)))
2510 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2511 (emit-byte-displacement-backpatch segment target)))
2513 (define-instruction loopz (segment target)
2514 (:printer short-jump ((op #b0001)))
2516 (emit-byte segment #b11100001)
2517 (emit-byte-displacement-backpatch segment target)))
2519 (define-instruction loopnz (segment target)
2520 (:printer short-jump ((op #b0000)))
2522 (emit-byte segment #b11100000)
2523 (emit-byte-displacement-backpatch segment target)))
2525 ;;;; conditional move
2526 (define-instruction cmov (segment cond dst src)
2527 (:printer cond-move ())
2529 (aver (register-p dst))
2530 (let ((size (matching-operand-size dst src)))
2531 (aver (or (eq size :word) (eq size :dword) (eq size :qword)))
2532 (maybe-emit-operand-size-prefix segment size))
2533 (maybe-emit-rex-for-ea segment src dst)
2534 (emit-byte segment #b00001111)
2535 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2536 (emit-ea segment src (reg-tn-encoding dst))))
2538 ;;;; conditional byte set
2540 (define-instruction set (segment dst cond)
2541 (:printer cond-set ())
2543 (maybe-emit-rex-for-ea segment dst nil)
2544 (emit-byte segment #b00001111)
2545 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2546 (emit-ea segment dst #b000)))
2550 (define-instruction enter (segment disp &optional (level 0))
2551 (:declare (type (unsigned-byte 16) disp)
2552 (type (unsigned-byte 8) level))
2553 (:printer enter-format ((op #b11001000)))
2555 (emit-byte segment #b11001000)
2556 (emit-word segment disp)
2557 (emit-byte segment level)))
2559 (define-instruction leave (segment)
2560 (:printer byte ((op #b11001001)))
2562 (emit-byte segment #b11001001)))
2564 ;;;; interrupt instructions
2566 (defun snarf-error-junk (sap offset &optional length-only)
2567 (let* ((length (sb!sys:sap-ref-8 sap offset))
2568 (vector (make-array length :element-type '(unsigned-byte 8))))
2569 (declare (type sb!sys:system-area-pointer sap)
2570 (type (unsigned-byte 8) length)
2571 (type (simple-array (unsigned-byte 8) (*)) vector))
2573 (values 0 (1+ length) nil nil))
2575 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2577 (collect ((sc-offsets)
2579 (lengths 1) ; the length byte
2581 (error-number (sb!c:read-var-integer vector index)))
2584 (when (>= index length)
2586 (let ((old-index index))
2587 (sc-offsets (sb!c:read-var-integer vector index))
2588 (lengths (- index old-index))))
2589 (values error-number
2595 (defmacro break-cases (breaknum &body cases)
2596 (let ((bn-temp (gensym)))
2597 (collect ((clauses))
2598 (dolist (case cases)
2599 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2600 `(let ((,bn-temp ,breaknum))
2601 (cond ,@(clauses))))))
2604 (defun break-control (chunk inst stream dstate)
2605 (declare (ignore inst))
2606 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2607 ;; XXX: {BYTE,WORD}-IMM-CODE below is a macro defined by the
2608 ;; DEFINE-INSTRUCTION-FORMAT for {BYTE,WORD}-IMM above. Due to
2609 ;; the spectacular design for DEFINE-INSTRUCTION-FORMAT (involving
2610 ;; a call to EVAL in order to define the macros at compile-time
2611 ;; only) they do not even show up as symbols in the target core.
2612 (case #!-ud2-breakpoints (byte-imm-code chunk dstate)
2613 #!+ud2-breakpoints (word-imm-code chunk dstate)
2616 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2619 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2621 (nt "breakpoint trap"))
2622 (#.pending-interrupt-trap
2623 (nt "pending interrupt trap"))
2626 (#.fun-end-breakpoint-trap
2627 (nt "function end breakpoint trap"))
2628 (#.single-step-around-trap
2629 (nt "single-step trap (around)"))
2630 (#.single-step-before-trap
2631 (nt "single-step trap (before)")))))
2633 (define-instruction break (segment code)
2634 (:declare (type (unsigned-byte 8) code))
2635 #!-ud2-breakpoints (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2636 :control #'break-control)
2637 #!+ud2-breakpoints (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
2638 :control #'break-control)
2640 #!-ud2-breakpoints (emit-byte segment #b11001100)
2641 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2642 ;; throw a sigill with 0x0b0f instead and check for this in the
2643 ;; SIGILL handler and pass it on to the sigtrap handler if
2645 #!+ud2-breakpoints (emit-word segment #b0000101100001111)
2646 (emit-byte segment code)))
2648 (define-instruction int (segment number)
2649 (:declare (type (unsigned-byte 8) number))
2650 (:printer byte-imm ((op #b11001101)))
2654 (emit-byte segment #b11001100))
2656 (emit-byte segment #b11001101)
2657 (emit-byte segment number)))))
2659 (define-instruction iret (segment)
2660 (:printer byte ((op #b11001111)))
2662 (emit-byte segment #b11001111)))
2664 ;;;; processor control
2666 (define-instruction hlt (segment)
2667 (:printer byte ((op #b11110100)))
2669 (emit-byte segment #b11110100)))
2671 (define-instruction nop (segment)
2672 (:printer byte ((op #b10010000)))
2674 (:printer ext-reg/mem-no-width ((op '(#x1f 0))) '(:name))
2676 (emit-byte segment #b10010000)))
2678 ;;; Emit a sequence of single- or multi-byte NOPs to fill AMOUNT many
2679 ;;; bytes with the smallest possible number of such instructions.
2680 (defun emit-long-nop (segment amount)
2681 (declare (type segment segment)
2682 (type index amount))
2683 ;; Pack all instructions into one byte vector to save space.
2684 (let* ((bytes #.(coerce #(#x90
2688 #x0f #x1f #x44 #x00 #x00
2689 #x66 #x0f #x1f #x44 #x00 #x00
2690 #x0f #x1f #x80 #x00 #x00 #x00 #x00
2691 #x0f #x1f #x84 #x00 #x00 #x00 #x00 #x00
2692 #x66 #x0f #x1f #x84 #x00 #x00 #x00 #x00 #x00)
2693 '(vector (unsigned-byte 8))))
2694 (max-length (isqrt (* 2 (length bytes)))))
2696 (let* ((count (min amount max-length))
2697 (start (ash (* count (1- count)) -1)))
2699 (emit-byte segment (aref bytes (+ start i)))))
2700 (if (> amount max-length)
2701 (decf amount max-length)
2704 (define-instruction wait (segment)
2705 (:printer byte ((op #b10011011)))
2707 (emit-byte segment #b10011011)))
2710 ;;;; miscellaneous hackery
2712 (define-instruction byte (segment byte)
2714 (emit-byte segment byte)))
2716 (define-instruction word (segment word)
2718 (emit-word segment word)))
2720 (define-instruction dword (segment dword)
2722 (emit-dword segment dword)))
2724 (defun emit-header-data (segment type)
2725 (emit-back-patch segment
2727 (lambda (segment posn)
2731 (component-header-length))
2735 (define-instruction simple-fun-header-word (segment)
2737 (emit-header-data segment simple-fun-header-widetag)))
2739 (define-instruction lra-header-word (segment)
2741 (emit-header-data segment return-pc-header-widetag)))
2743 ;;;; Instructions required to do floating point operations using SSE
2745 ;; Return a one- or two-element list of printers for SSE instructions.
2746 ;; The one-element list is used in the cases where the REX prefix is
2747 ;; really a prefix and thus automatically supported, the two-element
2748 ;; list is used when the REX prefix is used in an infix position.
2749 (eval-when (:compile-toplevel :execute)
2750 (defun sse-inst-printer-list (inst-format-stem prefix opcode
2751 &key more-fields printer)
2752 (let ((fields `(,@(when prefix
2753 `((prefix ,prefix)))
2756 (inst-formats (if prefix
2757 (list (symbolicate "EXT-" inst-format-stem)
2758 (symbolicate "EXT-REX-" inst-format-stem))
2759 (list inst-format-stem))))
2760 (mapcar (lambda (inst-format)
2761 `(,inst-format ,fields ,@(when printer
2765 (defun emit-sse-inst (segment dst src prefix opcode
2766 &key operand-size (remaining-bytes 0))
2768 (emit-byte segment prefix))
2770 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
2771 (maybe-emit-rex-for-ea segment src dst))
2772 (emit-byte segment #x0f)
2773 (emit-byte segment opcode)
2774 (emit-ea segment src (reg-tn-encoding dst) :remaining-bytes remaining-bytes))
2776 ;; 0110 0110:0000 1111:0111 00gg: 11 010 xmmreg:imm8
2778 (defun emit-sse-inst-with-imm (segment dst/src imm
2783 (emit-byte segment prefix))
2784 (maybe-emit-rex-prefix segment operand-size dst/src nil nil)
2785 (emit-byte segment #x0F)
2786 (emit-byte segment opcode)
2787 (emit-byte segment (logior (ash (logior #b11000 /i) 3)
2788 (reg-tn-encoding dst/src)))
2789 (emit-byte segment imm))
2792 ((define-imm-sse-instruction (name opcode /i)
2793 `(define-instruction ,name (segment dst/src imm)
2795 ',(sse-inst-printer-list 'xmm-imm #x66 opcode
2796 :more-fields `((/i ,/i))))
2798 (emit-sse-inst-with-imm segment dst/src imm
2800 :operand-size :do-not-set)))))
2801 (define-imm-sse-instruction pslldq #x73 7)
2802 (define-imm-sse-instruction psllw-imm #x71 6)
2803 (define-imm-sse-instruction pslld-imm #x72 6)
2804 (define-imm-sse-instruction psllq-imm #x73 6)
2806 (define-imm-sse-instruction psraw-imm #x71 4)
2807 (define-imm-sse-instruction psrad-imm #x72 4)
2809 (define-imm-sse-instruction psrldq #x73 3)
2810 (define-imm-sse-instruction psrlw-imm #x71 2)
2811 (define-imm-sse-instruction psrld-imm #x72 2)
2812 (define-imm-sse-instruction psrlq-imm #x73 2))
2814 ;;; Emit an SSE instruction that has an XMM register as the destination
2815 ;;; operand and for which the size of the operands is implicitly given
2816 ;;; by the instruction.
2817 (defun emit-regular-sse-inst (segment dst src prefix opcode
2818 &key (remaining-bytes 0))
2819 (aver (xmm-register-p dst))
2820 (emit-sse-inst segment dst src prefix opcode
2821 :operand-size :do-not-set
2822 :remaining-bytes remaining-bytes))
2824 ;;; Instructions having an XMM register as the destination operand
2825 ;;; and an XMM register or a memory location as the source operand.
2826 ;;; The operand size is implicitly given by the instruction.
2828 (macrolet ((define-regular-sse-inst (name prefix opcode)
2829 `(define-instruction ,name (segment dst src)
2831 ',(sse-inst-printer-list 'xmm-xmm/mem prefix opcode))
2833 (emit-regular-sse-inst segment dst src ,prefix ,opcode)))))
2835 (define-regular-sse-inst andpd #x66 #x54)
2836 (define-regular-sse-inst andps nil #x54)
2837 (define-regular-sse-inst andnpd #x66 #x55)
2838 (define-regular-sse-inst andnps nil #x55)
2839 (define-regular-sse-inst orpd #x66 #x56)
2840 (define-regular-sse-inst orps nil #x56)
2841 (define-regular-sse-inst pand #x66 #xdb)
2842 (define-regular-sse-inst pandn #x66 #xdf)
2843 (define-regular-sse-inst por #x66 #xeb)
2844 (define-regular-sse-inst pxor #x66 #xef)
2845 (define-regular-sse-inst xorpd #x66 #x57)
2846 (define-regular-sse-inst xorps nil #x57)
2848 (define-regular-sse-inst comisd #x66 #x2f)
2849 (define-regular-sse-inst comiss nil #x2f)
2850 (define-regular-sse-inst ucomisd #x66 #x2e)
2851 (define-regular-sse-inst ucomiss nil #x2e)
2852 ;; integer comparison
2853 (define-regular-sse-inst pcmpeqb #x66 #x74)
2854 (define-regular-sse-inst pcmpeqw #x66 #x75)
2855 (define-regular-sse-inst pcmpeqd #x66 #x76)
2856 (define-regular-sse-inst pcmpgtb #x66 #x64)
2857 (define-regular-sse-inst pcmpgtw #x66 #x65)
2858 (define-regular-sse-inst pcmpgtd #x66 #x66)
2860 (define-regular-sse-inst maxpd #x66 #x5f)
2861 (define-regular-sse-inst maxps nil #x5f)
2862 (define-regular-sse-inst maxsd #xf2 #x5f)
2863 (define-regular-sse-inst maxss #xf3 #x5f)
2864 (define-regular-sse-inst minpd #x66 #x5d)
2865 (define-regular-sse-inst minps nil #x5d)
2866 (define-regular-sse-inst minsd #xf2 #x5d)
2867 (define-regular-sse-inst minss #xf3 #x5d)
2869 (define-regular-sse-inst pmaxsw #x66 #xee)
2870 (define-regular-sse-inst pmaxub #x66 #xde)
2871 (define-regular-sse-inst pminsw #x66 #xea)
2872 (define-regular-sse-inst pminub #x66 #xda)
2874 (define-regular-sse-inst addpd #x66 #x58)
2875 (define-regular-sse-inst addps nil #x58)
2876 (define-regular-sse-inst addsd #xf2 #x58)
2877 (define-regular-sse-inst addss #xf3 #x58)
2878 (define-regular-sse-inst divpd #x66 #x5e)
2879 (define-regular-sse-inst divps nil #x5e)
2880 (define-regular-sse-inst divsd #xf2 #x5e)
2881 (define-regular-sse-inst divss #xf3 #x5e)
2882 (define-regular-sse-inst mulpd #x66 #x59)
2883 (define-regular-sse-inst mulps nil #x59)
2884 (define-regular-sse-inst mulsd #xf2 #x59)
2885 (define-regular-sse-inst mulss #xf3 #x59)
2886 (define-regular-sse-inst rcpps nil #x53)
2887 (define-regular-sse-inst rcpss #xf3 #x53)
2888 (define-regular-sse-inst rsqrtps nil #x52)
2889 (define-regular-sse-inst rsqrtss #xf3 #x52)
2890 (define-regular-sse-inst sqrtpd #x66 #x51)
2891 (define-regular-sse-inst sqrtps nil #x51)
2892 (define-regular-sse-inst sqrtsd #xf2 #x51)
2893 (define-regular-sse-inst sqrtss #xf3 #x51)
2894 (define-regular-sse-inst subpd #x66 #x5c)
2895 (define-regular-sse-inst subps nil #x5c)
2896 (define-regular-sse-inst subsd #xf2 #x5c)
2897 (define-regular-sse-inst subss #xf3 #x5c)
2898 (define-regular-sse-inst unpckhpd #x66 #x15)
2899 (define-regular-sse-inst unpckhps nil #x15)
2900 (define-regular-sse-inst unpcklpd #x66 #x14)
2901 (define-regular-sse-inst unpcklps nil #x14)
2902 ;; integer arithmetic
2903 (define-regular-sse-inst paddb #x66 #xfc)
2904 (define-regular-sse-inst paddw #x66 #xfd)
2905 (define-regular-sse-inst paddd #x66 #xfe)
2906 (define-regular-sse-inst paddq #x66 #xd4)
2907 (define-regular-sse-inst paddsb #x66 #xec)
2908 (define-regular-sse-inst paddsw #x66 #xed)
2909 (define-regular-sse-inst paddusb #x66 #xdc)
2910 (define-regular-sse-inst paddusw #x66 #xdd)
2911 (define-regular-sse-inst pavgb #x66 #xe0)
2912 (define-regular-sse-inst pavgw #x66 #xe3)
2913 (define-regular-sse-inst pmaddwd #x66 #xf5)
2914 (define-regular-sse-inst pmulhuw #x66 #xe4)
2915 (define-regular-sse-inst pmulhw #x66 #xe5)
2916 (define-regular-sse-inst pmullw #x66 #xd5)
2917 (define-regular-sse-inst pmuludq #x66 #xf4)
2918 (define-regular-sse-inst psadbw #x66 #xf6)
2919 (define-regular-sse-inst psllw #x66 #xf1)
2920 (define-regular-sse-inst pslld #x66 #xf2)
2921 (define-regular-sse-inst psllq #x66 #xf3)
2922 (define-regular-sse-inst psraw #x66 #xe1)
2923 (define-regular-sse-inst psrad #x66 #xe2)
2924 (define-regular-sse-inst psrlw #x66 #xd1)
2925 (define-regular-sse-inst psrld #x66 #xd2)
2926 (define-regular-sse-inst psrlq #x66 #xd3)
2927 (define-regular-sse-inst psubb #x66 #xf8)
2928 (define-regular-sse-inst psubw #x66 #xf9)
2929 (define-regular-sse-inst psubd #x66 #xfa)
2930 (define-regular-sse-inst psubq #x66 #xfb)
2931 (define-regular-sse-inst psubsb #x66 #xe8)
2932 (define-regular-sse-inst psubsw #x66 #xe9)
2933 (define-regular-sse-inst psubusb #x66 #xd8)
2934 (define-regular-sse-inst psubusw #x66 #xd9)
2936 (define-regular-sse-inst cvtdq2pd #xf3 #xe6)
2937 (define-regular-sse-inst cvtdq2ps nil #x5b)
2938 (define-regular-sse-inst cvtpd2dq #xf2 #xe6)
2939 (define-regular-sse-inst cvtpd2ps #x66 #x5a)
2940 (define-regular-sse-inst cvtps2dq #x66 #x5b)
2941 (define-regular-sse-inst cvtps2pd nil #x5a)
2942 (define-regular-sse-inst cvtsd2ss #xf2 #x5a)
2943 (define-regular-sse-inst cvtss2sd #xf3 #x5a)
2944 (define-regular-sse-inst cvttpd2dq #x66 #xe6)
2945 (define-regular-sse-inst cvttps2dq #xf3 #x5b)
2947 (define-regular-sse-inst packsswb #x66 #x63)
2948 (define-regular-sse-inst packssdw #x66 #x6b)
2949 (define-regular-sse-inst packuswb #x66 #x67)
2950 (define-regular-sse-inst punpckhbw #x66 #x68)
2951 (define-regular-sse-inst punpckhwd #x66 #x69)
2952 (define-regular-sse-inst punpckhdq #x66 #x6a)
2953 (define-regular-sse-inst punpckhqdq #x66 #x6d)
2954 (define-regular-sse-inst punpcklbw #x66 #x60)
2955 (define-regular-sse-inst punpcklwd #x66 #x61)
2956 (define-regular-sse-inst punpckldq #x66 #x62)
2957 (define-regular-sse-inst punpcklqdq #x66 #x6c))
2959 (macrolet ((define-xmm-shuffle-sse-inst (name prefix opcode n-bits radix)
2960 (let ((shuffle-pattern
2961 (intern (format nil "SSE-SHUFFLE-PATTERN-~D-~D"
2963 `(define-instruction ,name (segment dst src pattern)
2965 ',(sse-inst-printer-list
2966 'xmm-xmm/mem prefix opcode
2967 :more-fields `((imm nil :type ,shuffle-pattern))
2968 :printer '(:name :tab reg ", " reg/mem ", " imm)))
2971 (aver (typep pattern '(unsigned-byte ,n-bits)))
2972 (emit-regular-sse-inst segment dst src ,prefix ,opcode
2974 (emit-byte segment pattern))))))
2975 (define-xmm-shuffle-sse-inst pshufd #x66 #x70 8 4)
2976 (define-xmm-shuffle-sse-inst pshufhw #xf3 #x70 8 4)
2977 (define-xmm-shuffle-sse-inst pshuflw #xf2 #x70 8 4)
2978 (define-xmm-shuffle-sse-inst shufpd #x66 #xc6 2 2)
2979 (define-xmm-shuffle-sse-inst shufps nil #xc6 8 4))
2981 ;; MASKMOVDQU (dst is DS:RDI)
2982 (define-instruction maskmovdqu (segment src mask)
2984 (sse-inst-printer-list 'xmm-xmm/mem #x66 #xf7))
2986 (aver (xmm-register-p src))
2987 (aver (xmm-register-p mask))
2988 (emit-regular-sse-inst segment src mask #x66 #xf7)))
2990 (macrolet ((define-comparison-sse-inst (name prefix opcode
2991 name-prefix name-suffix)
2992 `(define-instruction ,name (segment op x y)
2994 ',(sse-inst-printer-list
2995 'xmm-xmm/mem prefix opcode
2996 :more-fields '((imm nil :type sse-condition-code))
2997 :printer `(,name-prefix imm ,name-suffix
2998 :tab reg ", " reg/mem)))
3000 (let ((code (position op *sse-conditions*)))
3002 (emit-regular-sse-inst segment x y ,prefix ,opcode
3004 (emit-byte segment code))))))
3005 (define-comparison-sse-inst cmppd #x66 #xc2 "CMP" "PD")
3006 (define-comparison-sse-inst cmpps nil #xc2 "CMP" "PS")
3007 (define-comparison-sse-inst cmpsd #xf2 #xc2 "CMP" "SD")
3008 (define-comparison-sse-inst cmpss #xf3 #xc2 "CMP" "SS"))
3011 (macrolet ((define-movsd/ss-sse-inst (name prefix)
3012 `(define-instruction ,name (segment dst src)
3014 ',(sse-inst-printer-list 'xmm-xmm/mem-dir
3017 (cond ((xmm-register-p dst)
3018 (emit-sse-inst segment dst src ,prefix #x10
3019 :operand-size :do-not-set))
3021 (aver (xmm-register-p src))
3022 (emit-sse-inst segment src dst ,prefix #x11
3023 :operand-size :do-not-set)))))))
3024 (define-movsd/ss-sse-inst movsd #xf2)
3025 (define-movsd/ss-sse-inst movss #xf3))
3028 (macrolet ((define-mov-sse-inst (name prefix opcode-from opcode-to
3029 &key force-to-mem reg-reg-name)
3032 `(define-instruction ,reg-reg-name (segment dst src)
3034 (aver (xmm-register-p dst))
3035 (aver (xmm-register-p src))
3036 (emit-regular-sse-inst segment dst src
3037 ,prefix ,opcode-from))))
3038 (define-instruction ,name (segment dst src)
3040 '(,@(when opcode-from
3041 (sse-inst-printer-list
3042 'xmm-xmm/mem prefix opcode-from))
3043 ,@(sse-inst-printer-list
3044 'xmm-xmm/mem prefix opcode-to
3045 :printer '(:name :tab reg/mem ", " reg))))
3047 (cond ,@(when opcode-from
3048 `(((xmm-register-p dst)
3050 `(aver (not (or (register-p src)
3051 (xmm-register-p src)))))
3052 (emit-regular-sse-inst
3053 segment dst src ,prefix ,opcode-from))))
3055 (aver (xmm-register-p src))
3057 `(aver (not (or (register-p dst)
3058 (xmm-register-p dst)))))
3059 (emit-regular-sse-inst segment src dst
3060 ,prefix ,opcode-to))))))))
3062 (define-mov-sse-inst movapd #x66 #x28 #x29)
3063 (define-mov-sse-inst movaps nil #x28 #x29)
3064 (define-mov-sse-inst movdqa #x66 #x6f #x7f)
3065 (define-mov-sse-inst movdqu #xf3 #x6f #x7f)
3068 (define-mov-sse-inst movntdq #x66 nil #xe7 :force-to-mem t)
3069 (define-mov-sse-inst movntpd #x66 nil #x2b :force-to-mem t)
3070 (define-mov-sse-inst movntps nil nil #x2b :force-to-mem t)
3072 ;; use movhps for movlhps and movlps for movhlps
3073 (define-mov-sse-inst movhpd #x66 #x16 #x17 :force-to-mem t)
3074 (define-mov-sse-inst movhps nil #x16 #x17 :reg-reg-name movlhps)
3075 (define-mov-sse-inst movlpd #x66 #x12 #x13 :force-to-mem t)
3076 (define-mov-sse-inst movlps nil #x12 #x13 :reg-reg-name movhlps)
3077 (define-mov-sse-inst movupd #x66 #x10 #x11)
3078 (define-mov-sse-inst movups nil #x10 #x11))
3081 (define-instruction movq (segment dst src)
3084 (sse-inst-printer-list 'xmm-xmm/mem #xf3 #x7e)
3085 (sse-inst-printer-list 'xmm-xmm/mem #x66 #xd6
3086 :printer '(:name :tab reg/mem ", " reg))))
3088 (cond ((xmm-register-p dst)
3089 (emit-sse-inst segment dst src #xf3 #x7e
3090 :operand-size :do-not-set))
3092 (aver (xmm-register-p src))
3093 (emit-sse-inst segment src dst #x66 #xd6
3094 :operand-size :do-not-set)))))
3096 ;;; Instructions having an XMM register as the destination operand
3097 ;;; and a general-purpose register or a memory location as the source
3098 ;;; operand. The operand size is calculated from the source operand.
3100 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
3101 ;;; a memory location to the low order 32 or 64 bits of an XMM register
3102 ;;; with zero extension or vice versa.
3103 ;;; We do not support the MMX version of this instruction.
3104 (define-instruction movd (segment dst src)
3107 (sse-inst-printer-list 'xmm-reg/mem #x66 #x6e)
3108 (sse-inst-printer-list 'xmm-reg/mem #x66 #x7e
3109 :printer '(:name :tab reg/mem ", " reg))))
3111 (cond ((xmm-register-p dst)
3112 (emit-sse-inst segment dst src #x66 #x6e))
3114 (aver (xmm-register-p src))
3115 (emit-sse-inst segment src dst #x66 #x7e)))))
3117 (define-instruction pinsrw (segment dst src imm)
3119 (sse-inst-printer-list
3120 'xmm-reg/mem #x66 #xc4
3121 :more-fields '((imm nil :type imm-byte))
3122 :printer '(:name :tab reg ", " reg/mem ", " imm)))
3124 (aver (xmm-register-p dst))
3125 (let ((src-size (operand-size src)))
3126 (aver (or (not (register-p src))
3127 (eq src-size :qword) (eq src-size :dword)))
3128 (emit-sse-inst segment dst src #x66 #xc4
3129 :operand-size (if (register-p src) src-size :do-not-set)
3130 :remaining-bytes 1))
3131 (emit-byte segment imm)))
3133 (define-instruction pextrw (segment dst src imm)
3135 (sse-inst-printer-list
3136 'reg-xmm/mem #x66 #xc5
3137 :more-fields '((imm nil :type imm-byte))
3138 :printer '(:name :tab reg ", " reg/mem ", " imm)))
3140 (aver (xmm-register-p src))
3141 (aver (register-p dst))
3142 (let ((dst-size (operand-size dst)))
3143 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3144 (emit-sse-inst segment dst src #x66 #xc5
3145 :operand-size dst-size
3146 :remaining-bytes 1))
3147 (emit-byte segment imm)))
3149 (macrolet ((define-integer-source-sse-inst (name prefix opcode &key mem-only)
3150 `(define-instruction ,name (segment dst src)
3152 ',(sse-inst-printer-list 'xmm-reg/mem prefix opcode))
3154 (aver (xmm-register-p dst))
3156 `(aver (not (or (register-p src)
3157 (xmm-register-p src)))))
3158 (let ((src-size (operand-size src)))
3159 (aver (or (eq src-size :qword) (eq src-size :dword))))
3160 (emit-sse-inst segment dst src ,prefix ,opcode)))))
3161 (define-integer-source-sse-inst cvtsi2sd #xf2 #x2a)
3162 (define-integer-source-sse-inst cvtsi2ss #xf3 #x2a)
3163 ;; FIXME: memory operand is always a QWORD
3164 (define-integer-source-sse-inst cvtpi2pd #x66 #x2a :mem-only t)
3165 (define-integer-source-sse-inst cvtpi2ps nil #x2a :mem-only t))
3167 ;;; Instructions having a general-purpose register as the destination
3168 ;;; operand and an XMM register or a memory location as the source
3169 ;;; operand. The operand size is calculated from the destination
3172 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode &key reg-only)
3173 `(define-instruction ,name (segment dst src)
3175 ',(sse-inst-printer-list 'reg-xmm/mem prefix opcode))
3177 (aver (register-p dst))
3179 `(aver (xmm-register-p src)))
3180 (let ((dst-size (operand-size dst)))
3181 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3182 (emit-sse-inst segment dst src ,prefix ,opcode
3183 :operand-size dst-size))))))
3184 (define-gpr-destination-sse-inst cvtsd2si #xf2 #x2d)
3185 (define-gpr-destination-sse-inst cvtss2si #xf3 #x2d)
3186 (define-gpr-destination-sse-inst cvttsd2si #xf2 #x2c)
3187 (define-gpr-destination-sse-inst cvttss2si #xf3 #x2c)
3188 (define-gpr-destination-sse-inst movmskpd #x66 #x50 :reg-only t)
3189 (define-gpr-destination-sse-inst movmskps nil #x50 :reg-only t)
3190 (define-gpr-destination-sse-inst pmovmskb #x66 #xd7 :reg-only t))
3192 ;;; Other SSE instructions
3194 ;; FIXME: is that right!?
3195 (define-instruction movnti (segment dst src)
3196 (:printer ext-reg-reg/mem-no-width ((op #xc3)))
3198 (aver (not (or (register-p dst)
3199 (xmm-register-p dst))))
3200 (aver (register-p src))
3201 (maybe-emit-rex-for-ea segment src dst)
3202 (emit-byte segment #x0f)
3203 (emit-byte segment #xc3)
3204 (emit-ea segment dst (reg-tn-encoding src))))
3206 (define-instruction prefetch (segment type src)
3207 (:printer ext-reg/mem-no-width ((op '(#x18 0)))
3208 '("PREFETCHNTA" :tab reg/mem))
3209 (:printer ext-reg/mem-no-width ((op '(#x18 1)))
3210 '("PREFETCHT0" :tab reg/mem))
3211 (:printer ext-reg/mem-no-width ((op '(#x18 2)))
3212 '("PREFETCHT1" :tab reg/mem))
3213 (:printer ext-reg/mem-no-width ((op '(#x18 3)))
3214 '("PREFETCHT2" :tab reg/mem))
3216 (aver (not (or (register-p src)
3217 (xmm-register-p src))))
3218 (aver (eq (operand-size src) :byte))
3219 (let ((type (position type #(:nta :t0 :t1 :t2))))
3221 (maybe-emit-rex-for-ea segment src nil)
3222 (emit-byte segment #x0f)
3223 (emit-byte segment #x18)
3224 (emit-ea segment src type))))
3226 (define-instruction clflush (segment src)
3227 (:printer ext-reg/mem-no-width ((op '(#xae 7))))
3229 (aver (not (or (register-p src)
3230 (xmm-register-p src))))
3231 (aver (eq (operand-size src) :byte))
3232 (maybe-emit-rex-for-ea segment src nil)
3233 (emit-byte segment #x0f)
3234 (emit-byte segment #xae)
3235 (emit-ea segment src 7)))
3237 (macrolet ((define-fence-instruction (name last-byte)
3238 `(define-instruction ,name (segment)
3239 (:printer three-bytes ((op '(#x0f #xae ,last-byte))))
3241 (emit-byte segment #x0f)
3242 (emit-byte segment #xae)
3243 (emit-byte segment ,last-byte)))))
3244 (define-fence-instruction lfence #b11101000)
3245 (define-fence-instruction mfence #b11110000)
3246 (define-fence-instruction sfence #b11111000))
3248 (define-instruction pause (segment)
3249 (:printer two-bytes ((op '(#xf3 #x90))))
3251 (emit-byte segment #xf3)
3252 (emit-byte segment #x90)))
3254 (define-instruction ldmxcsr (segment src)
3255 (:printer ext-reg/mem-no-width ((op '(#xae 2))))
3257 (aver (not (or (register-p src)
3258 (xmm-register-p src))))
3259 (aver (eq (operand-size src) :dword))
3260 (maybe-emit-rex-for-ea segment src nil)
3261 (emit-byte segment #x0f)
3262 (emit-byte segment #xae)
3263 (emit-ea segment src 2)))
3265 (define-instruction stmxcsr (segment dst)
3266 (:printer ext-reg/mem-no-width ((op '(#xae 3))))
3268 (aver (not (or (register-p dst)
3269 (xmm-register-p dst))))
3270 (aver (eq (operand-size dst) :dword))
3271 (maybe-emit-rex-for-ea segment dst nil)
3272 (emit-byte segment #x0f)
3273 (emit-byte segment #xae)
3274 (emit-ea segment dst 3)))
3278 (define-instruction cpuid (segment)
3279 (:printer two-bytes ((op '(#b00001111 #b10100010))))
3281 (emit-byte segment #b00001111)
3282 (emit-byte segment #b10100010)))
3284 (define-instruction rdtsc (segment)
3285 (:printer two-bytes ((op '(#b00001111 #b00110001))))
3287 (emit-byte segment #b00001111)
3288 (emit-byte segment #b00110001)))
3290 ;;;; Late VM definitions
3292 (defun canonicalize-inline-constant (constant &aux (alignedp nil))
3293 (let ((first (car constant)))
3294 (when (eql first :aligned)
3297 (setf first (car constant)))
3299 (single-float (setf constant (list :single-float first)))
3300 (double-float (setf constant (list :double-float first)))
3301 ((complex single-float)
3302 (setf constant (list :complex-single-float first)))
3303 ((complex double-float)
3304 (setf constant (list :complex-double-float first)))))
3305 (destructuring-bind (type value) constant
3307 ((:byte :word :dword :qword)
3308 (aver (integerp value))
3311 (aver (base-char-p value))
3312 (cons :byte (char-code value)))
3314 (aver (characterp value))
3315 (cons :dword (char-code value)))
3317 (aver (typep value 'single-float))
3318 (cons (if alignedp :oword :dword)
3319 (ldb (byte 32 0) (single-float-bits value))))
3321 (aver (typep value 'double-float))
3322 (cons (if alignedp :oword :qword)
3323 (ldb (byte 64 0) (logior (ash (double-float-high-bits value) 32)
3324 (double-float-low-bits value)))))
3325 ((:complex-single-float)
3326 (aver (typep value '(complex single-float)))
3327 (cons (if alignedp :oword :qword)
3329 (logior (ash (single-float-bits (imagpart value)) 32)
3331 (single-float-bits (realpart value)))))))
3333 (aver (integerp value))
3334 (cons :oword value))
3335 ((:complex-double-float)
3336 (aver (typep value '(complex double-float)))
3338 (logior (ash (double-float-high-bits (imagpart value)) 96)
3339 (ash (double-float-low-bits (imagpart value)) 64)
3340 (ash (ldb (byte 32 0)
3341 (double-float-high-bits (realpart value)))
3343 (double-float-low-bits (realpart value))))))))
3345 (defun inline-constant-value (constant)
3346 (let ((label (gen-label))
3347 (size (ecase (car constant)
3348 ((:byte :word :dword :qword) (car constant))
3349 ((:oword) :qword))))
3350 (values label (make-ea size
3351 :disp (make-fixup nil :code-object label)))))
3353 (defun emit-constant-segment-header (constants optimize)
3354 (declare (ignore constants))
3355 (loop repeat (if optimize 64 16) do (inst byte #x90)))
3357 (defun size-nbyte (size)
3365 (defun sort-inline-constants (constants)
3366 (stable-sort constants #'> :key (lambda (constant)
3367 (size-nbyte (caar constant)))))
3369 (defun emit-inline-constant (constant label)
3370 (let ((size (size-nbyte (car constant))))
3371 (emit-alignment (integer-length (1- size)))
3373 (let ((val (cdr constant)))
3375 do (inst byte (ldb (byte 8 0) val))
3376 (setf val (ash val -8))))))