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 width sized-p 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 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 (sb!disassem:define-instruction-format (ext-reg/mem-no-width+imm8 24
755 :include 'ext-reg/mem-no-width
757 '(:name :tab reg/mem ", " imm))
758 (imm :type 'imm-byte))
760 ;;;; XMM instructions
762 ;;; All XMM instructions use an extended opcode (#x0F as the first
763 ;;; opcode byte). Therefore in the following "EXT" in the name of the
764 ;;; instruction formats refers to the formats that have an additional
765 ;;; prefix (#x66, #xF2 or #xF3).
767 ;;; Instructions having an XMM register as the destination operand
768 ;;; and an XMM register or a memory location as the source operand.
769 ;;; The size of the operands is implicitly given by the instruction.
770 (sb!disassem:define-instruction-format (xmm-xmm/mem 24
772 '(:name :tab reg ", " reg/mem))
773 (x0f :field (byte 8 0) :value #x0f)
774 (op :field (byte 8 8))
775 (reg/mem :fields (list (byte 2 22) (byte 3 16))
777 (reg :field (byte 3 19) :type 'xmmreg)
781 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem 32
783 '(:name :tab reg ", " reg/mem))
784 (prefix :field (byte 8 0))
785 (x0f :field (byte 8 8) :value #x0f)
786 (op :field (byte 8 16))
787 (reg/mem :fields (list (byte 2 30) (byte 3 24))
789 (reg :field (byte 3 27) :type 'xmmreg)
792 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem 40
794 '(:name :tab reg ", " reg/mem))
795 (prefix :field (byte 8 0))
796 (rex :field (byte 4 12) :value #b0100)
797 (wrxb :field (byte 4 8) :type 'wrxb)
798 (x0f :field (byte 8 16) :value #x0f)
799 (op :field (byte 8 24))
800 (reg/mem :fields (list (byte 2 38) (byte 3 32))
802 (reg :field (byte 3 35) :type 'xmmreg)
805 (sb!disassem:define-instruction-format (ext-2byte-xmm-xmm/mem 40
807 '(:name :tab reg ", " reg/mem))
808 (prefix :field (byte 8 0))
809 (x0f :field (byte 8 8) :value #x0f)
810 (op1 :field (byte 8 16)) ; #x38 or #x3a
811 (op2 :field (byte 8 24))
812 (reg/mem :fields (list (byte 2 38) (byte 3 32))
814 (reg :field (byte 3 35) :type 'xmmreg))
816 (sb!disassem:define-instruction-format (ext-rex-2byte-xmm-xmm/mem 48
818 '(:name :tab reg ", " reg/mem))
819 (prefix :field (byte 8 0))
820 (rex :field (byte 4 12) :value #b0100)
821 (wrxb :field (byte 4 8) :type 'wrxb)
822 (x0f :field (byte 8 16) :value #x0f)
823 (op1 :field (byte 8 24)) ; #x38 or #x3a
824 (op2 :field (byte 8 32))
825 (reg/mem :fields (list (byte 2 46) (byte 3 40))
827 (reg :field (byte 3 43) :type 'xmmreg))
829 ;;; Same as xmm-xmm/mem etc., but with direction bit.
831 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-dir 32
832 :include 'ext-xmm-xmm/mem
836 ,(swap-if 'dir 'reg ", " 'reg/mem)))
837 (op :field (byte 7 17))
838 (dir :field (byte 1 16)))
840 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-dir 40
841 :include 'ext-rex-xmm-xmm/mem
845 ,(swap-if 'dir 'reg ", " 'reg/mem)))
846 (op :field (byte 7 25))
847 (dir :field (byte 1 24)))
849 ;;; Instructions having an XMM register as one operand
850 ;;; and a constant (unsigned) byte as the other.
852 (sb!disassem:define-instruction-format (ext-xmm-imm 32
854 '(:name :tab reg/mem ", " imm))
855 (prefix :field (byte 8 0))
856 (x0f :field (byte 8 8) :value #x0f)
857 (op :field (byte 8 16))
858 (/i :field (byte 3 27))
859 (b11 :field (byte 2 30) :value #b11)
860 (reg/mem :field (byte 3 24)
862 (imm :type 'imm-byte))
864 (sb!disassem:define-instruction-format (ext-rex-xmm-imm 40
866 '(:name :tab reg/mem ", " imm))
867 (prefix :field (byte 8 0))
868 (rex :field (byte 4 12) :value #b0100)
869 (wrxb :field (byte 4 8) :type 'wrxb)
870 (x0f :field (byte 8 16) :value #x0f)
871 (op :field (byte 8 24))
872 (/i :field (byte 3 35))
873 (b11 :field (byte 2 38) :value #b11)
874 (reg/mem :field (byte 3 32)
876 (imm :type 'imm-byte))
878 ;;; Instructions having an XMM register as one operand and a general-
879 ;;; -purpose register or a memory location as the other operand.
881 (sb!disassem:define-instruction-format (xmm-reg/mem 24
883 '(:name :tab reg ", " reg/mem))
884 (x0f :field (byte 8 0) :value #x0f)
885 (op :field (byte 8 8))
886 (reg/mem :fields (list (byte 2 22) (byte 3 16))
887 :type 'sized-reg/mem)
888 (reg :field (byte 3 19) :type 'xmmreg))
890 (sb!disassem:define-instruction-format (ext-xmm-reg/mem 32
892 '(:name :tab reg ", " reg/mem))
893 (prefix :field (byte 8 0))
894 (x0f :field (byte 8 8) :value #x0f)
895 (op :field (byte 8 16))
896 (reg/mem :fields (list (byte 2 30) (byte 3 24))
897 :type 'sized-reg/mem)
898 (reg :field (byte 3 27) :type 'xmmreg))
900 (sb!disassem:define-instruction-format (ext-rex-xmm-reg/mem 40
902 '(:name :tab reg ", " reg/mem))
903 (prefix :field (byte 8 0))
904 (rex :field (byte 4 12) :value #b0100)
905 (wrxb :field (byte 4 8) :type 'wrxb)
906 (x0f :field (byte 8 16) :value #x0f)
907 (op :field (byte 8 24))
908 (reg/mem :fields (list (byte 2 38) (byte 3 32))
909 :type 'sized-reg/mem)
910 (reg :field (byte 3 35) :type 'xmmreg))
912 ;;; Instructions having a general-purpose register as one operand and an
913 ;;; XMM register or a memory location as the other operand.
915 (sb!disassem:define-instruction-format (reg-xmm/mem 24
917 '(:name :tab reg ", " reg/mem))
918 (x0f :field (byte 8 0) :value #x0f)
919 (op :field (byte 8 8))
920 (reg/mem :fields (list (byte 2 22) (byte 3 16))
922 (reg :field (byte 3 19) :type 'reg))
924 (sb!disassem:define-instruction-format (ext-reg-xmm/mem 32
926 '(:name :tab reg ", " reg/mem))
927 (prefix :field (byte 8 0))
928 (x0f :field (byte 8 8) :value #x0f)
929 (op :field (byte 8 16))
930 (reg/mem :fields (list (byte 2 30) (byte 3 24))
932 (reg :field (byte 3 27) :type 'reg))
934 (sb!disassem:define-instruction-format (ext-rex-reg-xmm/mem 40
936 '(:name :tab reg ", " reg/mem))
937 (prefix :field (byte 8 0))
938 (rex :field (byte 4 12) :value #b0100)
939 (wrxb :field (byte 4 8) :type 'wrxb)
940 (x0f :field (byte 8 16) :value #x0f)
941 (op :field (byte 8 24))
942 (reg/mem :fields (list (byte 2 38) (byte 3 32))
944 (reg :field (byte 3 35) :type 'reg))
946 ;; XMM comparison instruction
948 (eval-when (:compile-toplevel :load-toplevel :execute)
949 (defparameter *sse-conditions* #(:eq :lt :le :unord :neq :nlt :nle :ord)))
951 (sb!disassem:define-arg-type sse-condition-code
952 ;; Inherit the prefilter from IMM-BYTE to READ-SUFFIX the byte.
954 :printer *sse-conditions*)
956 (sb!disassem:define-instruction-format (string-op 8
958 :default-printer '(:name width)))
960 (sb!disassem:define-instruction-format (short-cond-jump 16)
961 (op :field (byte 4 4))
962 (cc :field (byte 4 0) :type 'condition-code)
963 (label :field (byte 8 8) :type 'displacement))
965 (sb!disassem:define-instruction-format (short-jump 16
966 :default-printer '(:name :tab label))
967 (const :field (byte 4 4) :value #b1110)
968 (op :field (byte 4 0))
969 (label :field (byte 8 8) :type 'displacement))
971 (sb!disassem:define-instruction-format (near-cond-jump 16)
972 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
973 (cc :field (byte 4 8) :type 'condition-code)
974 ;; The disassembler currently doesn't let you have an instruction > 32 bits
975 ;; long, so we fake it by using a prefilter to read the offset.
976 (label :type 'displacement
977 :prefilter (lambda (value dstate)
978 (declare (ignore value)) ; always nil anyway
979 (sb!disassem:read-signed-suffix 32 dstate))))
981 (sb!disassem:define-instruction-format (near-jump 8
982 :default-printer '(:name :tab label))
983 (op :field (byte 8 0))
984 ;; The disassembler currently doesn't let you have an instruction > 32 bits
985 ;; long, so we fake it by using a prefilter to read the address.
986 (label :type 'displacement
987 :prefilter (lambda (value dstate)
988 (declare (ignore value)) ; always nil anyway
989 (sb!disassem:read-signed-suffix 32 dstate))))
992 (sb!disassem:define-instruction-format (cond-set 24
993 :default-printer '('set cc :tab reg/mem))
994 (prefix :field (byte 8 0) :value #b00001111)
995 (op :field (byte 4 12) :value #b1001)
996 (cc :field (byte 4 8) :type 'condition-code)
997 (reg/mem :fields (list (byte 2 22) (byte 3 16))
998 :type 'sized-byte-reg/mem)
999 (reg :field (byte 3 19) :value #b000))
1001 (sb!disassem:define-instruction-format (cond-move 24
1003 '('cmov cc :tab reg ", " reg/mem))
1004 (prefix :field (byte 8 0) :value #b00001111)
1005 (op :field (byte 4 12) :value #b0100)
1006 (cc :field (byte 4 8) :type 'condition-code)
1007 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1009 (reg :field (byte 3 19) :type 'reg))
1011 (sb!disassem:define-instruction-format (enter-format 32
1012 :default-printer '(:name
1014 (:unless (:constant 0)
1016 (op :field (byte 8 0))
1017 (disp :field (byte 16 8))
1018 (level :field (byte 8 24)))
1020 ;;; Single byte instruction with an immediate byte argument.
1021 (sb!disassem:define-instruction-format (byte-imm 16
1022 :default-printer '(:name :tab code))
1023 (op :field (byte 8 0))
1024 (code :field (byte 8 8)))
1026 ;;; Two byte instruction with an immediate byte argument.
1028 (sb!disassem:define-instruction-format (word-imm 24
1029 :default-printer '(:name :tab code))
1030 (op :field (byte 16 0))
1031 (code :field (byte 8 16)))
1033 ;;; F3 escape map - Needs a ton more work.
1035 (sb!disassem:define-instruction-format (F3-escape 24)
1036 (prefix1 :field (byte 8 0) :value #xF3)
1037 (prefix2 :field (byte 8 8) :value #x0F)
1038 (op :field (byte 8 16)))
1040 (sb!disassem:define-instruction-format (rex-F3-escape 32)
1041 ;; F3 is a legacy prefix which was generalized to select an alternate opcode
1042 ;; map. Legacy prefixes are encoded in the instruction before a REX prefix.
1043 (prefix1 :field (byte 8 0) :value #xF3)
1044 (rex :field (byte 4 12) :value 4) ; "prefix2"
1045 (wrxb :field (byte 4 8) :type 'wrxb)
1046 (prefix3 :field (byte 8 16) :value #x0F)
1047 (op :field (byte 8 24)))
1049 (sb!disassem:define-instruction-format (F3-escape-reg-reg/mem 32
1052 '(:name :tab reg "," reg/mem))
1053 (reg/mem :fields (list (byte 2 30) (byte 3 24)) :type 'sized-reg/mem)
1054 (reg :field (byte 3 27) :type 'reg))
1056 (sb!disassem:define-instruction-format (rex-F3-escape-reg-reg/mem 40
1057 :include 'rex-F3-escape
1059 '(:name :tab reg "," reg/mem))
1060 (reg/mem :fields (list (byte 2 38) (byte 3 32)) :type 'sized-reg/mem)
1061 (reg :field (byte 3 35) :type 'reg))
1064 ;;;; primitive emitters
1066 (define-bitfield-emitter emit-word 16
1069 (define-bitfield-emitter emit-dword 32
1072 ;;; Most uses of dwords are as displacements or as immediate values in
1073 ;;; 64-bit operations. In these cases they are sign-extended to 64 bits.
1074 ;;; EMIT-DWORD is unsuitable there because it accepts values of type
1075 ;;; (OR (SIGNED-BYTE 32) (UNSIGNED-BYTE 32)), so we provide a more
1076 ;;; restricted emitter here.
1077 (defun emit-signed-dword (segment value)
1078 (declare (type segment segment)
1079 (type (signed-byte 32) value))
1080 (declare (inline emit-dword))
1081 (emit-dword segment value))
1083 (define-bitfield-emitter emit-qword 64
1086 (define-bitfield-emitter emit-byte-with-reg 8
1087 (byte 5 3) (byte 3 0))
1089 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
1090 (byte 2 6) (byte 3 3) (byte 3 0))
1092 (define-bitfield-emitter emit-sib-byte 8
1093 (byte 2 6) (byte 3 3) (byte 3 0))
1095 (define-bitfield-emitter emit-rex-byte 8
1096 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1102 (defun emit-absolute-fixup (segment fixup &optional quad-p)
1103 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
1104 (let ((offset (fixup-offset fixup)))
1105 (if (label-p offset)
1106 (emit-back-patch segment
1108 (lambda (segment posn)
1109 (declare (ignore posn))
1110 (let ((val (- (+ (component-header-length)
1111 (or (label-position offset)
1113 other-pointer-lowtag)))
1115 (emit-qword segment val)
1116 (emit-signed-dword segment val)))))
1118 (emit-qword segment (or offset 0))
1119 (emit-signed-dword segment (or offset 0))))))
1121 (defun emit-relative-fixup (segment fixup)
1122 (note-fixup segment :relative fixup)
1123 (emit-signed-dword segment (or (fixup-offset fixup) 0)))
1126 ;;;; the effective-address (ea) structure
1128 (defun reg-tn-encoding (tn)
1129 (declare (type tn tn))
1130 ;; ea only has space for three bits of register number: regs r8
1131 ;; and up are selected by a REX prefix byte which caller is responsible
1132 ;; for having emitted where necessary already
1133 (ecase (sb-name (sc-sb (tn-sc tn)))
1135 (let ((offset (mod (tn-offset tn) 16)))
1136 (logior (ash (logand offset 1) 2)
1139 (mod (tn-offset tn) 8))))
1141 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1143 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1144 ;; can't actually emit it on its own: caller also needs to emit REX
1146 (size nil :type (member :byte :word :dword :qword))
1147 (base nil :type (or tn null))
1148 (index nil :type (or tn null))
1149 (scale 1 :type (member 1 2 4 8))
1150 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1151 (def!method print-object ((ea ea) stream)
1152 (cond ((or *print-escape* *print-readably*)
1153 (print-unreadable-object (ea stream :type t)
1155 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1159 (let ((scale (ea-scale ea)))
1160 (if (= scale 1) nil scale))
1163 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1165 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1167 (write-string "+" stream)))
1169 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1170 (unless (= (ea-scale ea) 1)
1171 (format stream "*~A" (ea-scale ea)))
1172 (typecase (ea-disp ea)
1175 (format stream "~@D" (ea-disp ea)))
1177 (format stream "+~A" (ea-disp ea))))
1178 (write-char #\] stream))))
1180 (defun emit-constant-tn-rip (segment constant-tn reg remaining-bytes)
1181 ;; AMD64 doesn't currently have a code object register to use as a
1182 ;; base register for constant access. Instead we use RIP-relative
1183 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1184 ;; is passed to the backpatch callback. In addition we need the offset
1185 ;; from the start of the function header to the slot in the CODE-HEADER
1186 ;; that stores the constant. Since we don't know where the code header
1187 ;; starts, instead count backwards from the function header.
1188 (let* ((2comp (component-info *component-being-compiled*))
1189 (constants (ir2-component-constants 2comp))
1190 (len (length constants))
1191 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1192 ;; If there are an even amount of constants, there will be
1193 ;; an extra qword of padding before the function header, which
1194 ;; needs to be adjusted for. XXX: This will break if new slots
1195 ;; are added to the code header.
1196 (offset (* (- (+ len (if (evenp len)
1199 (tn-offset constant-tn))
1201 ;; RIP-relative addressing
1202 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1203 (emit-back-patch segment
1205 (lambda (segment posn)
1206 ;; The addressing is relative to end of instruction,
1207 ;; i.e. the end of this dword. Hence the + 4.
1208 (emit-signed-dword segment
1209 (+ 4 remaining-bytes
1210 (- (+ offset posn)))))))
1213 (defun emit-label-rip (segment fixup reg remaining-bytes)
1214 (let ((label (fixup-offset fixup)))
1215 ;; RIP-relative addressing
1216 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1217 (emit-back-patch segment
1219 (lambda (segment posn)
1220 (emit-signed-dword segment
1221 (- (label-position label)
1222 (+ posn 4 remaining-bytes))))))
1225 (defun emit-ea (segment thing reg &key allow-constants (remaining-bytes 0))
1228 ;; this would be eleganter if we had a function that would create
1230 (ecase (sb-name (sc-sb (tn-sc thing)))
1231 ((registers float-registers)
1232 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1234 ;; Convert stack tns into an index off RBP.
1235 (let ((disp (frame-byte-offset (tn-offset thing))))
1236 (cond ((<= -128 disp 127)
1237 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1238 (emit-byte segment disp))
1240 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1241 (emit-signed-dword segment disp)))))
1243 (unless allow-constants
1246 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1247 (emit-constant-tn-rip segment thing reg remaining-bytes))))
1249 (let* ((base (ea-base thing))
1250 (index (ea-index thing))
1251 (scale (ea-scale thing))
1252 (disp (ea-disp thing))
1253 (mod (cond ((or (null base)
1255 (not (= (reg-tn-encoding base) #b101))))
1257 ((and (fixnump disp) (<= -128 disp 127))
1261 (r/m (cond (index #b100)
1263 (t (reg-tn-encoding base)))))
1264 (when (and (fixup-p disp)
1265 (label-p (fixup-offset disp)))
1268 (return-from emit-ea (emit-ea segment disp reg
1269 :allow-constants allow-constants
1270 :remaining-bytes remaining-bytes)))
1271 (when (and (= mod 0) (= r/m #b101))
1272 ;; this is rip-relative in amd64, so we'll use a sib instead
1273 (setf r/m #b100 scale 1))
1274 (emit-mod-reg-r/m-byte segment mod reg r/m)
1276 (let ((ss (1- (integer-length scale)))
1277 (index (if (null index)
1279 (let ((index (reg-tn-encoding index)))
1281 (error "can't index off of ESP")
1283 (base (if (null base)
1285 (reg-tn-encoding base))))
1286 (emit-sib-byte segment ss index base)))
1288 (emit-byte segment disp))
1289 ((or (= mod #b10) (null base))
1291 (emit-absolute-fixup segment disp)
1292 (emit-signed-dword segment disp))))))
1294 (typecase (fixup-offset thing)
1296 (emit-label-rip segment thing reg remaining-bytes))
1298 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1299 (emit-sib-byte segment 0 #b100 #b101)
1300 (emit-absolute-fixup segment thing))))))
1302 (defun byte-reg-p (thing)
1304 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1305 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1308 (defun byte-ea-p (thing)
1310 (ea (eq (ea-size thing) :byte))
1312 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1315 (defun word-reg-p (thing)
1317 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1318 (member (sc-name (tn-sc thing)) *word-sc-names*)
1321 (defun word-ea-p (thing)
1323 (ea (eq (ea-size thing) :word))
1324 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1327 (defun dword-reg-p (thing)
1329 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1330 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1333 (defun dword-ea-p (thing)
1335 (ea (eq (ea-size thing) :dword))
1337 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1340 (defun qword-reg-p (thing)
1342 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1343 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1346 (defun qword-ea-p (thing)
1348 (ea (eq (ea-size thing) :qword))
1350 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1353 ;;; Return true if THING is a general-purpose register TN.
1354 (defun register-p (thing)
1356 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1358 (defun accumulator-p (thing)
1359 (and (register-p thing)
1360 (= (tn-offset thing) 0)))
1362 ;;; Return true if THING is an XMM register TN.
1363 (defun xmm-register-p (thing)
1365 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1370 (def!constant +operand-size-prefix-byte+ #b01100110)
1372 (defun maybe-emit-operand-size-prefix (segment size)
1373 (unless (or (eq size :byte)
1374 (eq size :qword) ; REX prefix handles this
1375 (eq size +default-operand-size+))
1376 (emit-byte segment +operand-size-prefix-byte+)))
1378 ;;; A REX prefix must be emitted if at least one of the following
1379 ;;; conditions is true:
1380 ;; 1. The operand size is :QWORD and the default operand size of the
1381 ;; instruction is not :QWORD.
1382 ;;; 2. The instruction references an extended register.
1383 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1386 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1387 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1388 ;;; this should not happen, for example because the instruction's
1389 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1390 ;;; registers the encodings of which are extended with the REX.R, REX.X
1391 ;;; and REX.B bit, respectively. To determine whether one of the byte
1392 ;;; registers is used that can only be accessed using a REX prefix, we
1393 ;;; need only to test R and B, because X is only used for the index
1394 ;;; register of an effective address and therefore never byte-sized.
1395 ;;; For R we can avoid to calculate the size of the TN because it is
1396 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1397 ;;; B can be address-sized (if it is the base register of an effective
1398 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1399 ;;; registers) or of some different size (in the instructions that
1400 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1401 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1402 ;;; between general-purpose and floating point registers for this cause
1403 ;;; because only general-purpose registers can be byte-sized at all.
1404 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1405 (declare (type (member nil :byte :word :dword :qword :do-not-set)
1407 (type (or null tn) r x b))
1409 (if (and r (> (tn-offset r)
1410 ;; offset of r8 is 16, offset of xmm8 is 8
1411 (if (eq (sb-name (sc-sb (tn-sc r)))
1418 ;; Assuming R is a TN describing a general-purpose
1419 ;; register, return true if it references register
1421 (<= 8 (tn-offset r) 15)))
1422 (let ((rex-w (if (eq operand-size :qword) 1 0))
1426 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1428 (eq operand-size :byte)
1431 (eq (operand-size b) :byte)
1433 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1435 ;;; Emit a REX prefix if necessary. The operand size is determined from
1436 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1437 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1438 ;;; pass its index and base registers, if it is a register TN, we pass
1440 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1441 ;;; be treated specially here: If THING is a stack TN, neither it nor
1442 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1443 ;;; works correctly because stack references always use RBP as the base
1444 ;;; register and never use an index register so no extended registers
1445 ;;; need to be accessed. Fixups are assembled using an addressing mode
1446 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1447 ;;; not reference an extended register. The displacement-only addressing
1448 ;;; mode requires that REX.X is 0, which is ensured here.
1449 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1450 (declare (type (or ea tn fixup) thing)
1451 (type (or null tn) reg)
1452 (type (member nil :byte :word :dword :qword :do-not-set)
1454 (let ((ea-p (ea-p thing)))
1455 (maybe-emit-rex-prefix segment
1456 (or operand-size (operand-size thing))
1458 (and ea-p (ea-index thing))
1459 (cond (ea-p (ea-base thing))
1461 (member (sb-name (sc-sb (tn-sc thing)))
1462 '(float-registers registers)))
1466 (defun operand-size (thing)
1469 ;; FIXME: might as well be COND instead of having to use #. readmacro
1470 ;; to hack up the code
1471 (case (sc-name (tn-sc thing))
1480 ;; added by jrd: float-registers is a separate size (?)
1481 ;; The only place in the code where we are called with THING
1482 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1483 ;; checks whether THING is a byte register. Thus our result in
1484 ;; these cases could as well be :dword and :qword. I leave it as
1485 ;; :float and :double which is more likely to trigger an aver
1486 ;; instead of silently doing the wrong thing in case this
1487 ;; situation should change. Lutz Euler, 2005-10-23.
1490 (#.*double-sc-names*
1492 (#.*complex-sc-names*
1495 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1499 ;; GNA. Guess who spelt "flavor" correctly first time round?
1500 ;; There's a strong argument in my mind to change all uses of
1501 ;; "flavor" to "kind": and similarly with some misguided uses of
1502 ;; "type" here and there. -- CSR, 2005-01-06.
1503 (case (fixup-flavor thing)
1504 ((:foreign-dataref) :qword)))
1508 (defun matching-operand-size (dst src)
1509 (let ((dst-size (operand-size dst))
1510 (src-size (operand-size src)))
1513 (if (eq dst-size src-size)
1515 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1516 dst dst-size src src-size))
1520 (error "can't tell the size of either ~S or ~S" dst src)))))
1522 ;;; Except in a very few cases (MOV instructions A1, A3 and B8 - BF)
1523 ;;; we expect dword data bytes even when 64 bit work is being done.
1524 ;;; But A1 and A3 are currently unused and B8 - BF use EMIT-QWORD
1525 ;;; directly, so we emit all quad constants as dwords, additionally
1526 ;;; making sure that they survive the sign-extension to 64 bits
1528 (defun emit-sized-immediate (segment size value)
1531 (emit-byte segment value))
1533 (emit-word segment value))
1535 (emit-dword segment value))
1537 (emit-signed-dword segment value))))
1541 (define-instruction rex (segment)
1542 (:printer rex () nil :print-name nil)
1544 (bug "REX prefix used as a standalone instruction")))
1546 (define-instruction x66 (segment)
1547 (:printer x66 () nil :print-name nil)
1549 (bug "#X66 prefix used as a standalone instruction")))
1551 (defun emit-prefix (segment name)
1552 (declare (ignorable segment))
1557 (emit-byte segment #xf0))))
1559 (define-instruction lock (segment)
1560 (:printer byte ((op #b11110000)) nil)
1562 (bug "LOCK prefix used as a standalone instruction")))
1564 (define-instruction rep (segment)
1566 (emit-byte segment #b11110011)))
1568 (define-instruction repe (segment)
1569 (:printer byte ((op #b11110011)) nil)
1571 (emit-byte segment #b11110011)))
1573 (define-instruction repne (segment)
1574 (:printer byte ((op #b11110010)) nil)
1576 (emit-byte segment #b11110010)))
1578 ;;;; general data transfer
1580 ;;; This is the part of the MOV instruction emitter that does moving
1581 ;;; of an immediate value into a qword register. We go to some length
1582 ;;; to achieve the shortest possible encoding.
1583 (defun emit-immediate-move-to-qword-register (segment dst src)
1584 (declare (type integer src))
1585 (cond ((typep src '(unsigned-byte 32))
1586 ;; We use the B8 - BF encoding with an operand size of 32 bits
1587 ;; here and let the implicit zero-extension fill the upper half
1588 ;; of the 64-bit destination register. Instruction size: five
1589 ;; or six bytes. (A REX prefix will be emitted only if the
1590 ;; destination is an extended register.)
1591 (maybe-emit-rex-prefix segment :dword nil nil dst)
1592 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1593 (emit-dword segment src))
1595 (maybe-emit-rex-prefix segment :qword nil nil dst)
1596 (cond ((typep src '(signed-byte 32))
1597 ;; Use the C7 encoding that takes a 32-bit immediate and
1598 ;; sign-extends it to 64 bits. Instruction size: seven
1600 (emit-byte segment #b11000111)
1601 (emit-mod-reg-r/m-byte segment #b11 #b000
1602 (reg-tn-encoding dst))
1603 (emit-signed-dword segment src))
1604 ((<= (- (expt 2 64) (expt 2 31))
1607 ;; This triggers on positive integers of 64 bits length
1608 ;; with the most significant 33 bits being 1. We use the
1609 ;; same encoding as in the previous clause.
1610 (emit-byte segment #b11000111)
1611 (emit-mod-reg-r/m-byte segment #b11 #b000
1612 (reg-tn-encoding dst))
1613 (emit-signed-dword segment (- src (expt 2 64))))
1615 ;; We need a full 64-bit immediate. Instruction size:
1617 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1618 (emit-qword segment src))))))
1620 (define-instruction mov (segment dst src)
1621 ;; immediate to register
1622 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1623 '(:name :tab reg ", " imm))
1624 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1625 '(:name :tab reg ", " imm))
1626 ;; absolute mem to/from accumulator
1627 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1628 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1629 ;; register to/from register/memory
1630 (:printer reg-reg/mem-dir ((op #b100010)))
1631 ;; immediate to register/memory
1632 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1635 (let ((size (matching-operand-size dst src)))
1636 (maybe-emit-operand-size-prefix segment size)
1637 (cond ((register-p dst)
1638 (cond ((integerp src)
1639 (cond ((eq size :qword)
1640 (emit-immediate-move-to-qword-register segment
1643 (maybe-emit-rex-prefix segment size nil nil dst)
1644 (emit-byte-with-reg segment
1648 (reg-tn-encoding dst))
1649 (emit-sized-immediate segment size src))))
1651 (maybe-emit-rex-for-ea segment src dst)
1656 (emit-ea segment src (reg-tn-encoding dst) :allow-constants t))))
1658 ;; C7 only deals with 32 bit immediates even if the
1659 ;; destination is a 64-bit location. The value is
1660 ;; sign-extended in this case.
1661 (maybe-emit-rex-for-ea segment dst nil)
1662 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
1663 (emit-ea segment dst #b000)
1664 (emit-sized-immediate segment size src))
1666 (maybe-emit-rex-for-ea segment dst src)
1667 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1668 (emit-ea segment dst (reg-tn-encoding src)))
1670 ;; Generally we can't MOV a fixupped value into an EA, since
1671 ;; MOV on non-registers can only take a 32-bit immediate arg.
1672 ;; Make an exception for :FOREIGN fixups (pretty much just
1673 ;; the runtime asm, since other foreign calls go through the
1674 ;; the linkage table) and for linkage table references, since
1675 ;; these should always end up in low memory.
1676 (aver (or (eq (fixup-flavor src) :foreign)
1677 (eq (fixup-flavor src) :foreign-dataref)
1678 (eq (ea-size dst) :dword)))
1679 (maybe-emit-rex-for-ea segment dst nil)
1680 (emit-byte segment #b11000111)
1681 (emit-ea segment dst #b000)
1682 (emit-absolute-fixup segment src))
1684 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1686 ;;; Emit a sign-extending (if SIGNED-P is true) or zero-extending move.
1687 ;;; To achieve the shortest possible encoding zero extensions into a
1688 ;;; 64-bit destination are assembled as a straight 32-bit MOV (if the
1689 ;;; source size is 32 bits) or as MOVZX with a 32-bit destination (if
1690 ;;; the source size is 8 or 16 bits). Due to the implicit zero extension
1691 ;;; to 64 bits this has the same effect as a MOVZX with 64-bit
1692 ;;; destination but often needs no REX prefix.
1693 (defun emit-move-with-extension (segment dst src signed-p)
1694 (aver (register-p dst))
1695 (let ((dst-size (operand-size dst))
1696 (src-size (operand-size src))
1697 (opcode (if signed-p #b10111110 #b10110110)))
1698 (macrolet ((emitter (operand-size &rest bytes)
1700 (maybe-emit-rex-for-ea segment src dst
1701 :operand-size ,operand-size)
1702 ,@(mapcar (lambda (byte)
1703 `(emit-byte segment ,byte))
1705 (emit-ea segment src (reg-tn-encoding dst)))))
1708 (aver (eq src-size :byte))
1709 (maybe-emit-operand-size-prefix segment :word)
1710 (emitter :word #b00001111 opcode))
1713 (setf dst-size :dword))
1716 (emitter dst-size #b00001111 opcode))
1718 (emitter dst-size #b00001111 (logior opcode 1)))
1720 (aver (or (not signed-p) (eq dst-size :qword)))
1722 (if signed-p #x63 #x8b))))))))) ; movsxd or straight mov
1724 (define-instruction movsx (segment dst src)
1725 (:printer ext-reg-reg/mem-no-width
1726 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1727 (:printer ext-reg-reg/mem-no-width
1728 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1729 (:emitter (emit-move-with-extension segment dst src :signed)))
1731 (define-instruction movzx (segment dst src)
1732 (:printer ext-reg-reg/mem-no-width
1733 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1734 (:printer ext-reg-reg/mem-no-width
1735 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1736 (:emitter (emit-move-with-extension segment dst src nil)))
1738 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1739 ;;; sign-extends the dword source into the qword destination register.
1740 ;;; If the operand size is :dword the instruction zero-extends the dword
1741 ;;; source into the qword destination register, i.e. it does the same as
1742 ;;; a dword MOV into a register.
1743 (define-instruction movsxd (segment dst src)
1744 (:printer reg-reg/mem ((op #b0110001) (width 1)
1745 (reg/mem nil :type 'sized-dword-reg/mem)))
1746 (:emitter (emit-move-with-extension segment dst src :signed)))
1748 ;;; this is not a real amd64 instruction, of course
1749 (define-instruction movzxd (segment dst src)
1750 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1751 (:emitter (emit-move-with-extension segment dst src nil)))
1753 (define-instruction push (segment src)
1755 (:printer reg-no-width-default-qword ((op #b01010)))
1757 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1759 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1761 (:printer byte ((op #b01101000)
1762 (imm nil :type 'signed-imm-data-default-qword))
1764 ;; ### segment registers?
1767 (cond ((integerp src)
1768 (cond ((<= -128 src 127)
1769 (emit-byte segment #b01101010)
1770 (emit-byte segment src))
1772 ;; A REX-prefix is not needed because the operand size
1773 ;; defaults to 64 bits. The size of the immediate is 32
1774 ;; bits and it is sign-extended.
1775 (emit-byte segment #b01101000)
1776 (emit-signed-dword segment src))))
1778 (let ((size (operand-size src)))
1779 (aver (or (eq size :qword) (eq size :word)))
1780 (maybe-emit-operand-size-prefix segment size)
1781 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1782 (cond ((register-p src)
1783 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1785 (emit-byte segment #b11111111)
1786 (emit-ea segment src #b110 :allow-constants t))))))))
1788 (define-instruction pop (segment dst)
1789 (:printer reg-no-width-default-qword ((op #b01011)))
1790 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1792 (let ((size (operand-size dst)))
1793 (aver (or (eq size :qword) (eq size :word)))
1794 (maybe-emit-operand-size-prefix segment size)
1795 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1796 (cond ((register-p dst)
1797 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1799 (emit-byte segment #b10001111)
1800 (emit-ea segment dst #b000))))))
1802 (define-instruction xchg (segment operand1 operand2)
1803 ;; Register with accumulator.
1804 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1805 ;; Register/Memory with Register.
1806 (:printer reg-reg/mem ((op #b1000011)))
1808 (let ((size (matching-operand-size operand1 operand2)))
1809 (maybe-emit-operand-size-prefix segment size)
1810 (labels ((xchg-acc-with-something (acc something)
1811 (if (and (not (eq size :byte)) (register-p something))
1813 (maybe-emit-rex-for-ea segment acc something)
1814 (emit-byte-with-reg segment
1816 (reg-tn-encoding something)))
1817 (xchg-reg-with-something acc something)))
1818 (xchg-reg-with-something (reg something)
1819 (maybe-emit-rex-for-ea segment something reg)
1820 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1821 (emit-ea segment something (reg-tn-encoding reg))))
1822 (cond ((accumulator-p operand1)
1823 (xchg-acc-with-something operand1 operand2))
1824 ((accumulator-p operand2)
1825 (xchg-acc-with-something operand2 operand1))
1826 ((register-p operand1)
1827 (xchg-reg-with-something operand1 operand2))
1828 ((register-p operand2)
1829 (xchg-reg-with-something operand2 operand1))
1831 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1833 (define-instruction lea (segment dst src)
1834 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1836 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1837 (maybe-emit-rex-for-ea segment src dst
1838 :operand-size (if (dword-reg-p dst) :dword :qword))
1839 (emit-byte segment #b10001101)
1840 (emit-ea segment src (reg-tn-encoding dst))))
1842 (define-instruction cmpxchg (segment dst src &optional prefix)
1843 ;; Register/Memory with Register.
1844 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1846 (aver (register-p src))
1847 (emit-prefix segment prefix)
1848 (let ((size (matching-operand-size src dst)))
1849 (maybe-emit-operand-size-prefix segment size)
1850 (maybe-emit-rex-for-ea segment dst src)
1851 (emit-byte segment #b00001111)
1852 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1853 (emit-ea segment dst (reg-tn-encoding src)))))
1856 ;;;; flag control instructions
1858 ;;; CLC -- Clear Carry Flag.
1859 (define-instruction clc (segment)
1860 (:printer byte ((op #b11111000)))
1862 (emit-byte segment #b11111000)))
1864 ;;; CLD -- Clear Direction Flag.
1865 (define-instruction cld (segment)
1866 (:printer byte ((op #b11111100)))
1868 (emit-byte segment #b11111100)))
1870 ;;; CLI -- Clear Iterrupt Enable Flag.
1871 (define-instruction cli (segment)
1872 (:printer byte ((op #b11111010)))
1874 (emit-byte segment #b11111010)))
1876 ;;; CMC -- Complement Carry Flag.
1877 (define-instruction cmc (segment)
1878 (:printer byte ((op #b11110101)))
1880 (emit-byte segment #b11110101)))
1882 ;;; LAHF -- Load AH into flags.
1883 (define-instruction lahf (segment)
1884 (:printer byte ((op #b10011111)))
1886 (emit-byte segment #b10011111)))
1888 ;;; POPF -- Pop flags.
1889 (define-instruction popf (segment)
1890 (:printer byte ((op #b10011101)))
1892 (emit-byte segment #b10011101)))
1894 ;;; PUSHF -- push flags.
1895 (define-instruction pushf (segment)
1896 (:printer byte ((op #b10011100)))
1898 (emit-byte segment #b10011100)))
1900 ;;; SAHF -- Store AH into flags.
1901 (define-instruction sahf (segment)
1902 (:printer byte ((op #b10011110)))
1904 (emit-byte segment #b10011110)))
1906 ;;; STC -- Set Carry Flag.
1907 (define-instruction stc (segment)
1908 (:printer byte ((op #b11111001)))
1910 (emit-byte segment #b11111001)))
1912 ;;; STD -- Set Direction Flag.
1913 (define-instruction std (segment)
1914 (:printer byte ((op #b11111101)))
1916 (emit-byte segment #b11111101)))
1918 ;;; STI -- Set Interrupt Enable Flag.
1919 (define-instruction sti (segment)
1920 (:printer byte ((op #b11111011)))
1922 (emit-byte segment #b11111011)))
1926 (defun emit-random-arith-inst (name segment dst src opcode
1927 &optional allow-constants)
1928 (let ((size (matching-operand-size dst src)))
1929 (maybe-emit-operand-size-prefix segment size)
1932 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1933 (maybe-emit-rex-for-ea segment dst nil)
1934 (emit-byte segment #b10000011)
1935 (emit-ea segment dst opcode :allow-constants allow-constants)
1936 (emit-byte segment src))
1937 ((accumulator-p dst)
1938 (maybe-emit-rex-for-ea segment dst nil)
1945 (emit-sized-immediate segment size src))
1947 (maybe-emit-rex-for-ea segment dst nil)
1948 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1949 (emit-ea segment dst opcode :allow-constants allow-constants)
1950 (emit-sized-immediate segment size src))))
1952 (maybe-emit-rex-for-ea segment dst src)
1956 (if (eq size :byte) #b00000000 #b00000001)))
1957 (emit-ea segment dst (reg-tn-encoding src) :allow-constants allow-constants))
1959 (maybe-emit-rex-for-ea segment src dst)
1963 (if (eq size :byte) #b00000010 #b00000011)))
1964 (emit-ea segment src (reg-tn-encoding dst) :allow-constants allow-constants))
1966 (error "bogus operands to ~A" name)))))
1968 (eval-when (:compile-toplevel :execute)
1969 (defun arith-inst-printer-list (subop)
1970 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1971 (reg/mem-imm ((op (#b1000000 ,subop))))
1972 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1973 ;; therefore we force WIDTH to 1.
1974 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1975 (imm nil :type signed-imm-byte)))
1976 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000)))))))
1978 (define-instruction add (segment dst src &optional prefix)
1979 (:printer-list (arith-inst-printer-list #b000))
1981 (emit-prefix segment prefix)
1982 (emit-random-arith-inst "ADD" segment dst src #b000)))
1984 (define-instruction adc (segment dst src)
1985 (:printer-list (arith-inst-printer-list #b010))
1986 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1988 (define-instruction sub (segment dst src)
1989 (:printer-list (arith-inst-printer-list #b101))
1990 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1992 (define-instruction sbb (segment dst src)
1993 (:printer-list (arith-inst-printer-list #b011))
1994 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1996 (define-instruction cmp (segment dst src)
1997 (:printer-list (arith-inst-printer-list #b111))
1998 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
2000 ;;; The one-byte encodings for INC and DEC are used as REX prefixes
2001 ;;; in 64-bit mode so we always use the two-byte form.
2002 (define-instruction inc (segment dst)
2003 (:printer reg/mem ((op '(#b1111111 #b000))))
2005 (let ((size (operand-size dst)))
2006 (maybe-emit-operand-size-prefix segment size)
2007 (maybe-emit-rex-for-ea segment dst nil)
2008 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2009 (emit-ea segment dst #b000))))
2011 (define-instruction dec (segment dst)
2012 (:printer reg/mem ((op '(#b1111111 #b001))))
2014 (let ((size (operand-size dst)))
2015 (maybe-emit-operand-size-prefix segment size)
2016 (maybe-emit-rex-for-ea segment dst nil)
2017 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2018 (emit-ea segment dst #b001))))
2020 (define-instruction neg (segment dst)
2021 (:printer reg/mem ((op '(#b1111011 #b011))))
2023 (let ((size (operand-size dst)))
2024 (maybe-emit-operand-size-prefix segment size)
2025 (maybe-emit-rex-for-ea segment dst nil)
2026 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2027 (emit-ea segment dst #b011))))
2029 (define-instruction mul (segment dst src)
2030 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
2032 (let ((size (matching-operand-size dst src)))
2033 (aver (accumulator-p dst))
2034 (maybe-emit-operand-size-prefix segment size)
2035 (maybe-emit-rex-for-ea segment src nil)
2036 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2037 (emit-ea segment src #b100))))
2039 (define-instruction imul (segment dst &optional src1 src2)
2040 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
2041 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
2042 (:printer reg-reg/mem ((op #b0110100) (width 1)
2043 (imm nil :type 'signed-imm-data))
2044 '(:name :tab reg ", " reg/mem ", " imm))
2045 (:printer reg-reg/mem ((op #b0110101) (width 1)
2046 (imm nil :type 'signed-imm-byte))
2047 '(:name :tab reg ", " reg/mem ", " imm))
2049 (flet ((r/m-with-immed-to-reg (reg r/m immed)
2050 (let* ((size (matching-operand-size reg r/m))
2051 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
2052 (maybe-emit-operand-size-prefix segment size)
2053 (maybe-emit-rex-for-ea segment r/m reg)
2054 (emit-byte segment (if sx #b01101011 #b01101001))
2055 (emit-ea segment r/m (reg-tn-encoding reg))
2057 (emit-byte segment immed)
2058 (emit-sized-immediate segment size immed)))))
2060 (r/m-with-immed-to-reg dst src1 src2))
2063 (r/m-with-immed-to-reg dst dst src1)
2064 (let ((size (matching-operand-size dst src1)))
2065 (maybe-emit-operand-size-prefix segment size)
2066 (maybe-emit-rex-for-ea segment src1 dst)
2067 (emit-byte segment #b00001111)
2068 (emit-byte segment #b10101111)
2069 (emit-ea segment src1 (reg-tn-encoding dst)))))
2071 (let ((size (operand-size dst)))
2072 (maybe-emit-operand-size-prefix segment size)
2073 (maybe-emit-rex-for-ea segment dst nil)
2074 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2075 (emit-ea segment dst #b101)))))))
2077 (define-instruction div (segment dst src)
2078 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
2080 (let ((size (matching-operand-size dst src)))
2081 (aver (accumulator-p dst))
2082 (maybe-emit-operand-size-prefix segment size)
2083 (maybe-emit-rex-for-ea segment src nil)
2084 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2085 (emit-ea segment src #b110))))
2087 (define-instruction idiv (segment dst src)
2088 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
2090 (let ((size (matching-operand-size dst src)))
2091 (aver (accumulator-p dst))
2092 (maybe-emit-operand-size-prefix segment size)
2093 (maybe-emit-rex-for-ea segment src nil)
2094 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2095 (emit-ea segment src #b111))))
2097 (define-instruction bswap (segment dst)
2098 (:printer ext-reg-no-width ((op #b11001)))
2100 (let ((size (operand-size dst)))
2101 (maybe-emit-rex-prefix segment size nil nil dst)
2102 (emit-byte segment #x0f)
2103 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
2105 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2106 (define-instruction cbw (segment)
2107 (:printer x66-byte ((op #b10011000)))
2109 (maybe-emit-operand-size-prefix segment :word)
2110 (emit-byte segment #b10011000)))
2112 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2113 (define-instruction cwde (segment)
2114 (:printer byte ((op #b10011000)))
2116 (maybe-emit-operand-size-prefix segment :dword)
2117 (emit-byte segment #b10011000)))
2119 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2120 (define-instruction cdqe (segment)
2121 (:printer rex-byte ((op #b10011000)))
2123 (maybe-emit-rex-prefix segment :qword nil nil nil)
2124 (emit-byte segment #b10011000)))
2126 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2127 (define-instruction cwd (segment)
2128 (:printer x66-byte ((op #b10011001)))
2130 (maybe-emit-operand-size-prefix segment :word)
2131 (emit-byte segment #b10011001)))
2133 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2134 (define-instruction cdq (segment)
2135 (:printer byte ((op #b10011001)))
2137 (maybe-emit-operand-size-prefix segment :dword)
2138 (emit-byte segment #b10011001)))
2140 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2141 (define-instruction cqo (segment)
2142 (:printer rex-byte ((op #b10011001)))
2144 (maybe-emit-rex-prefix segment :qword nil nil nil)
2145 (emit-byte segment #b10011001)))
2147 (define-instruction xadd (segment dst src &optional prefix)
2148 ;; Register/Memory with Register.
2149 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
2151 (aver (register-p src))
2152 (emit-prefix segment prefix)
2153 (let ((size (matching-operand-size src dst)))
2154 (maybe-emit-operand-size-prefix segment size)
2155 (maybe-emit-rex-for-ea segment dst src)
2156 (emit-byte segment #b00001111)
2157 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2158 (emit-ea segment dst (reg-tn-encoding src)))))
2163 (defun emit-shift-inst (segment dst amount opcode)
2164 (let ((size (operand-size dst)))
2165 (maybe-emit-operand-size-prefix segment size)
2166 (multiple-value-bind (major-opcode immed)
2168 (:cl (values #b11010010 nil))
2169 (1 (values #b11010000 nil))
2170 (t (values #b11000000 t)))
2171 (maybe-emit-rex-for-ea segment dst nil)
2173 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2174 (emit-ea segment dst opcode)
2176 (emit-byte segment amount)))))
2178 (eval-when (:compile-toplevel :execute)
2179 (defun shift-inst-printer-list (subop)
2180 `((reg/mem ((op (#b1101000 ,subop)))
2181 (:name :tab reg/mem ", 1"))
2182 (reg/mem ((op (#b1101001 ,subop)))
2183 (:name :tab reg/mem ", " 'cl))
2184 (reg/mem-imm ((op (#b1100000 ,subop))
2185 (imm nil :type imm-byte))))))
2187 (define-instruction rol (segment dst amount)
2189 (shift-inst-printer-list #b000))
2191 (emit-shift-inst segment dst amount #b000)))
2193 (define-instruction ror (segment dst amount)
2195 (shift-inst-printer-list #b001))
2197 (emit-shift-inst segment dst amount #b001)))
2199 (define-instruction rcl (segment dst amount)
2201 (shift-inst-printer-list #b010))
2203 (emit-shift-inst segment dst amount #b010)))
2205 (define-instruction rcr (segment dst amount)
2207 (shift-inst-printer-list #b011))
2209 (emit-shift-inst segment dst amount #b011)))
2211 (define-instruction shl (segment dst amount)
2213 (shift-inst-printer-list #b100))
2215 (emit-shift-inst segment dst amount #b100)))
2217 (define-instruction shr (segment dst amount)
2219 (shift-inst-printer-list #b101))
2221 (emit-shift-inst segment dst amount #b101)))
2223 (define-instruction sar (segment dst amount)
2225 (shift-inst-printer-list #b111))
2227 (emit-shift-inst segment dst amount #b111)))
2229 (defun emit-double-shift (segment opcode dst src amt)
2230 (let ((size (matching-operand-size dst src)))
2231 (when (eq size :byte)
2232 (error "Double shifts can only be used with words."))
2233 (maybe-emit-operand-size-prefix segment size)
2234 (maybe-emit-rex-for-ea segment dst src)
2235 (emit-byte segment #b00001111)
2236 (emit-byte segment (dpb opcode (byte 1 3)
2237 (if (eq amt :cl) #b10100101 #b10100100)))
2238 (emit-ea segment dst (reg-tn-encoding src))
2239 (unless (eq amt :cl)
2240 (emit-byte segment amt))))
2242 (eval-when (:compile-toplevel :execute)
2243 (defun double-shift-inst-printer-list (op)
2244 `((ext-reg-reg/mem-no-width ((op ,(logior op #b100))
2245 (imm nil :type imm-byte))
2246 (:name :tab reg/mem ", " reg ", " imm))
2247 (ext-reg-reg/mem-no-width ((op ,(logior op #b101)))
2248 (:name :tab reg/mem ", " reg ", " 'cl)))))
2250 (define-instruction shld (segment dst src amt)
2251 (:declare (type (or (member :cl) (mod 64)) amt))
2252 (:printer-list (double-shift-inst-printer-list #b10100000))
2254 (emit-double-shift segment #b0 dst src amt)))
2256 (define-instruction shrd (segment dst src amt)
2257 (:declare (type (or (member :cl) (mod 64)) amt))
2258 (:printer-list (double-shift-inst-printer-list #b10101000))
2260 (emit-double-shift segment #b1 dst src amt)))
2262 (define-instruction and (segment dst src)
2264 (arith-inst-printer-list #b100))
2266 (emit-random-arith-inst "AND" segment dst src #b100)))
2268 (define-instruction test (segment this that)
2269 (:printer accum-imm ((op #b1010100)))
2270 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2271 (:printer reg-reg/mem ((op #b1000010)))
2273 (let ((size (matching-operand-size this that)))
2274 (maybe-emit-operand-size-prefix segment size)
2275 (flet ((test-immed-and-something (immed something)
2276 (cond ((accumulator-p something)
2277 (maybe-emit-rex-for-ea segment something nil)
2279 (if (eq size :byte) #b10101000 #b10101001))
2280 (emit-sized-immediate segment size immed))
2282 (maybe-emit-rex-for-ea segment something nil)
2284 (if (eq size :byte) #b11110110 #b11110111))
2285 (emit-ea segment something #b000)
2286 (emit-sized-immediate segment size immed))))
2287 (test-reg-and-something (reg something)
2288 (maybe-emit-rex-for-ea segment something reg)
2289 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2290 (emit-ea segment something (reg-tn-encoding reg))))
2291 (cond ((integerp that)
2292 (test-immed-and-something that this))
2294 (test-immed-and-something this that))
2296 (test-reg-and-something this that))
2298 (test-reg-and-something that this))
2300 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2302 ;;; Emit the most compact form of the test immediate instruction,
2303 ;;; using an 8 bit test when the immediate is only 8 bits and the
2304 ;;; value is one of the four low registers (rax, rbx, rcx, rdx) or the
2306 (defun emit-optimized-test-inst (x y)
2309 (let ((offset (tn-offset x)))
2310 (cond ((and (sc-is x any-reg descriptor-reg)
2311 (or (= offset rax-offset) (= offset rbx-offset)
2312 (= offset rcx-offset) (= offset rdx-offset)))
2313 (inst test (reg-in-size x :byte) y))
2314 ((sc-is x control-stack)
2315 (inst test (make-ea :byte :base rbp-tn
2316 :disp (frame-byte-offset offset))
2323 (define-instruction or (segment dst src)
2325 (arith-inst-printer-list #b001))
2327 (emit-random-arith-inst "OR" segment dst src #b001)))
2329 (define-instruction xor (segment dst src)
2331 (arith-inst-printer-list #b110))
2333 (emit-random-arith-inst "XOR" segment dst src #b110)))
2335 (define-instruction not (segment dst)
2336 (:printer reg/mem ((op '(#b1111011 #b010))))
2338 (let ((size (operand-size dst)))
2339 (maybe-emit-operand-size-prefix segment size)
2340 (maybe-emit-rex-for-ea segment dst nil)
2341 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2342 (emit-ea segment dst #b010))))
2344 ;;;; string manipulation
2346 (define-instruction cmps (segment size)
2347 (:printer string-op ((op #b1010011)))
2349 (maybe-emit-operand-size-prefix segment size)
2350 (maybe-emit-rex-prefix segment size nil nil nil)
2351 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2353 (define-instruction ins (segment acc)
2354 (:printer string-op ((op #b0110110)))
2356 (let ((size (operand-size acc)))
2357 (aver (accumulator-p acc))
2358 (maybe-emit-operand-size-prefix segment size)
2359 (maybe-emit-rex-prefix segment size nil nil nil)
2360 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2362 (define-instruction lods (segment acc)
2363 (:printer string-op ((op #b1010110)))
2365 (let ((size (operand-size acc)))
2366 (aver (accumulator-p acc))
2367 (maybe-emit-operand-size-prefix segment size)
2368 (maybe-emit-rex-prefix segment size nil nil nil)
2369 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2371 (define-instruction movs (segment size)
2372 (:printer string-op ((op #b1010010)))
2374 (maybe-emit-operand-size-prefix segment size)
2375 (maybe-emit-rex-prefix segment size nil nil nil)
2376 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2378 (define-instruction outs (segment acc)
2379 (:printer string-op ((op #b0110111)))
2381 (let ((size (operand-size acc)))
2382 (aver (accumulator-p acc))
2383 (maybe-emit-operand-size-prefix segment size)
2384 (maybe-emit-rex-prefix segment size nil nil nil)
2385 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2387 (define-instruction scas (segment acc)
2388 (:printer string-op ((op #b1010111)))
2390 (let ((size (operand-size acc)))
2391 (aver (accumulator-p acc))
2392 (maybe-emit-operand-size-prefix segment size)
2393 (maybe-emit-rex-prefix segment size nil nil nil)
2394 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2396 (define-instruction stos (segment acc)
2397 (:printer string-op ((op #b1010101)))
2399 (let ((size (operand-size acc)))
2400 (aver (accumulator-p acc))
2401 (maybe-emit-operand-size-prefix segment size)
2402 (maybe-emit-rex-prefix segment size nil nil nil)
2403 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2405 (define-instruction xlat (segment)
2406 (:printer byte ((op #b11010111)))
2408 (emit-byte segment #b11010111)))
2411 ;;;; bit manipulation
2413 (define-instruction bsf (segment dst src)
2414 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2416 (let ((size (matching-operand-size dst src)))
2417 (when (eq size :byte)
2418 (error "can't scan bytes: ~S" src))
2419 (maybe-emit-operand-size-prefix segment size)
2420 (maybe-emit-rex-for-ea segment src dst)
2421 (emit-byte segment #b00001111)
2422 (emit-byte segment #b10111100)
2423 (emit-ea segment src (reg-tn-encoding dst)))))
2425 (define-instruction bsr (segment dst src)
2426 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2428 (let ((size (matching-operand-size dst src)))
2429 (when (eq size :byte)
2430 (error "can't scan bytes: ~S" src))
2431 (maybe-emit-operand-size-prefix segment size)
2432 (maybe-emit-rex-for-ea segment src dst)
2433 (emit-byte segment #b00001111)
2434 (emit-byte segment #b10111101)
2435 (emit-ea segment src (reg-tn-encoding dst)))))
2437 (defun emit-bit-test-and-mumble (segment src index opcode)
2438 (let ((size (operand-size src)))
2439 (when (eq size :byte)
2440 (error "can't scan bytes: ~S" src))
2441 (maybe-emit-operand-size-prefix segment size)
2442 (cond ((integerp index)
2443 (maybe-emit-rex-for-ea segment src nil)
2444 (emit-byte segment #b00001111)
2445 (emit-byte segment #b10111010)
2446 (emit-ea segment src opcode)
2447 (emit-byte segment index))
2449 (maybe-emit-rex-for-ea segment src index)
2450 (emit-byte segment #b00001111)
2451 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2452 (emit-ea segment src (reg-tn-encoding index))))))
2454 (eval-when (:compile-toplevel :execute)
2455 (defun bit-test-inst-printer-list (subop)
2456 `((ext-reg/mem-no-width+imm8 ((op (#xBA ,subop))))
2457 (ext-reg-reg/mem-no-width ((op ,(dpb subop (byte 3 3) #b10000011))
2458 (reg/mem nil :type sized-reg/mem))
2459 (:name :tab reg/mem ", " reg)))))
2461 (macrolet ((define (inst opcode-extension)
2462 `(define-instruction ,inst (segment src index)
2463 (:printer-list (bit-test-inst-printer-list ,opcode-extension))
2464 (:emitter (emit-bit-test-and-mumble segment src index
2465 ,opcode-extension)))))
2472 ;;;; control transfer
2474 (define-instruction call (segment where)
2475 (:printer near-jump ((op #b11101000)))
2476 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2480 (emit-byte segment #b11101000) ; 32 bit relative
2481 (emit-back-patch segment
2483 (lambda (segment posn)
2484 (emit-signed-dword segment
2485 (- (label-position where)
2488 ;; There is no CALL rel64...
2489 (error "Cannot CALL a fixup: ~S" where))
2491 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2492 (emit-byte segment #b11111111)
2493 (emit-ea segment where #b010)))))
2495 (defun emit-byte-displacement-backpatch (segment target)
2496 (emit-back-patch segment
2498 (lambda (segment posn)
2499 (let ((disp (- (label-position target) (1+ posn))))
2500 (aver (<= -128 disp 127))
2501 (emit-byte segment disp)))))
2503 (define-instruction jmp (segment cond &optional where)
2504 ;; conditional jumps
2505 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2506 (:printer near-cond-jump () '('j cc :tab label))
2507 ;; unconditional jumps
2508 (:printer short-jump ((op #b1011)))
2509 (:printer near-jump ((op #b11101001)))
2510 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2515 (lambda (segment posn delta-if-after)
2516 (let ((disp (- (label-position where posn delta-if-after)
2518 (when (<= -128 disp 127)
2520 (dpb (conditional-opcode cond)
2523 (emit-byte-displacement-backpatch segment where)
2525 (lambda (segment posn)
2526 (let ((disp (- (label-position where) (+ posn 6))))
2527 (emit-byte segment #b00001111)
2529 (dpb (conditional-opcode cond)
2532 (emit-signed-dword segment disp)))))
2533 ((label-p (setq where cond))
2536 (lambda (segment posn delta-if-after)
2537 (let ((disp (- (label-position where posn delta-if-after)
2539 (when (<= -128 disp 127)
2540 (emit-byte segment #b11101011)
2541 (emit-byte-displacement-backpatch segment where)
2543 (lambda (segment posn)
2544 (let ((disp (- (label-position where) (+ posn 5))))
2545 (emit-byte segment #b11101001)
2546 (emit-signed-dword segment disp)))))
2548 (emit-byte segment #b11101001)
2549 (emit-relative-fixup segment where))
2551 (unless (or (ea-p where) (tn-p where))
2552 (error "don't know what to do with ~A" where))
2553 ;; near jump defaults to 64 bit
2554 ;; w-bit in rex prefix is unnecessary
2555 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2556 (emit-byte segment #b11111111)
2557 (emit-ea segment where #b100)))))
2559 (define-instruction ret (segment &optional stack-delta)
2560 (:printer byte ((op #b11000011)))
2561 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2564 (cond ((and stack-delta (not (zerop stack-delta)))
2565 (emit-byte segment #b11000010)
2566 (emit-word segment stack-delta))
2568 (emit-byte segment #b11000011)))))
2570 (define-instruction jrcxz (segment target)
2571 (:printer short-jump ((op #b0011)))
2573 (emit-byte segment #b11100011)
2574 (emit-byte-displacement-backpatch segment target)))
2576 (define-instruction loop (segment target)
2577 (:printer short-jump ((op #b0010)))
2579 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2580 (emit-byte-displacement-backpatch segment target)))
2582 (define-instruction loopz (segment target)
2583 (:printer short-jump ((op #b0001)))
2585 (emit-byte segment #b11100001)
2586 (emit-byte-displacement-backpatch segment target)))
2588 (define-instruction loopnz (segment target)
2589 (:printer short-jump ((op #b0000)))
2591 (emit-byte segment #b11100000)
2592 (emit-byte-displacement-backpatch segment target)))
2594 ;;;; conditional move
2595 (define-instruction cmov (segment cond dst src)
2596 (:printer cond-move ())
2598 (aver (register-p dst))
2599 (let ((size (matching-operand-size dst src)))
2600 (aver (or (eq size :word) (eq size :dword) (eq size :qword)))
2601 (maybe-emit-operand-size-prefix segment size))
2602 (maybe-emit-rex-for-ea segment src dst)
2603 (emit-byte segment #b00001111)
2604 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2605 (emit-ea segment src (reg-tn-encoding dst))))
2607 ;;;; conditional byte set
2609 (define-instruction set (segment dst cond)
2610 (:printer cond-set ())
2612 (maybe-emit-rex-for-ea segment dst nil)
2613 (emit-byte segment #b00001111)
2614 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2615 (emit-ea segment dst #b000)))
2619 (define-instruction enter (segment disp &optional (level 0))
2620 (:declare (type (unsigned-byte 16) disp)
2621 (type (unsigned-byte 8) level))
2622 (:printer enter-format ((op #b11001000)))
2624 (emit-byte segment #b11001000)
2625 (emit-word segment disp)
2626 (emit-byte segment level)))
2628 (define-instruction leave (segment)
2629 (:printer byte ((op #b11001001)))
2631 (emit-byte segment #b11001001)))
2633 ;;;; interrupt instructions
2635 (defun snarf-error-junk (sap offset &optional length-only)
2636 (let* ((length (sb!sys:sap-ref-8 sap offset))
2637 (vector (make-array length :element-type '(unsigned-byte 8))))
2638 (declare (type sb!sys:system-area-pointer sap)
2639 (type (unsigned-byte 8) length)
2640 (type (simple-array (unsigned-byte 8) (*)) vector))
2642 (values 0 (1+ length) nil nil))
2644 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2646 (collect ((sc-offsets)
2648 (lengths 1) ; the length byte
2650 (error-number (sb!c:read-var-integer vector index)))
2653 (when (>= index length)
2655 (let ((old-index index))
2656 (sc-offsets (sb!c:read-var-integer vector index))
2657 (lengths (- index old-index))))
2658 (values error-number
2664 (defmacro break-cases (breaknum &body cases)
2665 (let ((bn-temp (gensym)))
2666 (collect ((clauses))
2667 (dolist (case cases)
2668 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2669 `(let ((,bn-temp ,breaknum))
2670 (cond ,@(clauses))))))
2673 (defun break-control (chunk inst stream dstate)
2674 (declare (ignore inst))
2675 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2676 ;; XXX: {BYTE,WORD}-IMM-CODE below is a macro defined by the
2677 ;; DEFINE-INSTRUCTION-FORMAT for {BYTE,WORD}-IMM above. Due to
2678 ;; the spectacular design for DEFINE-INSTRUCTION-FORMAT (involving
2679 ;; a call to EVAL in order to define the macros at compile-time
2680 ;; only) they do not even show up as symbols in the target core.
2681 (case #!-ud2-breakpoints (byte-imm-code chunk dstate)
2682 #!+ud2-breakpoints (word-imm-code chunk dstate)
2685 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2688 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2690 (nt "breakpoint trap"))
2691 (#.pending-interrupt-trap
2692 (nt "pending interrupt trap"))
2695 (#.fun-end-breakpoint-trap
2696 (nt "function end breakpoint trap"))
2697 (#.single-step-around-trap
2698 (nt "single-step trap (around)"))
2699 (#.single-step-before-trap
2700 (nt "single-step trap (before)")))))
2702 (define-instruction break (segment code)
2703 (:declare (type (unsigned-byte 8) code))
2704 #!-ud2-breakpoints (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2705 :control #'break-control)
2706 #!+ud2-breakpoints (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
2707 :control #'break-control)
2709 #!-ud2-breakpoints (emit-byte segment #b11001100)
2710 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2711 ;; throw a sigill with 0x0b0f instead and check for this in the
2712 ;; SIGILL handler and pass it on to the sigtrap handler if
2714 #!+ud2-breakpoints (emit-word segment #b0000101100001111)
2715 (emit-byte segment code)))
2717 (define-instruction int (segment number)
2718 (:declare (type (unsigned-byte 8) number))
2719 (:printer byte-imm ((op #b11001101)))
2723 (emit-byte segment #b11001100))
2725 (emit-byte segment #b11001101)
2726 (emit-byte segment number)))))
2728 (define-instruction iret (segment)
2729 (:printer byte ((op #b11001111)))
2731 (emit-byte segment #b11001111)))
2733 ;;;; processor control
2735 (define-instruction hlt (segment)
2736 (:printer byte ((op #b11110100)))
2738 (emit-byte segment #b11110100)))
2740 (define-instruction nop (segment)
2741 (:printer byte ((op #b10010000)))
2743 (:printer ext-reg/mem-no-width ((op '(#x1f 0))) '(:name))
2745 (emit-byte segment #b10010000)))
2747 ;;; Emit a sequence of single- or multi-byte NOPs to fill AMOUNT many
2748 ;;; bytes with the smallest possible number of such instructions.
2749 (defun emit-long-nop (segment amount)
2750 (declare (type segment segment)
2751 (type index amount))
2752 ;; Pack all instructions into one byte vector to save space.
2753 (let* ((bytes #.(coerce #(#x90
2757 #x0f #x1f #x44 #x00 #x00
2758 #x66 #x0f #x1f #x44 #x00 #x00
2759 #x0f #x1f #x80 #x00 #x00 #x00 #x00
2760 #x0f #x1f #x84 #x00 #x00 #x00 #x00 #x00
2761 #x66 #x0f #x1f #x84 #x00 #x00 #x00 #x00 #x00)
2762 '(vector (unsigned-byte 8))))
2763 (max-length (isqrt (* 2 (length bytes)))))
2765 (let* ((count (min amount max-length))
2766 (start (ash (* count (1- count)) -1)))
2768 (emit-byte segment (aref bytes (+ start i)))))
2769 (if (> amount max-length)
2770 (decf amount max-length)
2773 (define-instruction wait (segment)
2774 (:printer byte ((op #b10011011)))
2776 (emit-byte segment #b10011011)))
2779 ;;;; miscellaneous hackery
2781 (define-instruction byte (segment byte)
2783 (emit-byte segment byte)))
2785 (define-instruction word (segment word)
2787 (emit-word segment word)))
2789 (define-instruction dword (segment dword)
2791 (emit-dword segment dword)))
2793 (defun emit-header-data (segment type)
2794 (emit-back-patch segment
2796 (lambda (segment posn)
2800 (component-header-length))
2804 (define-instruction simple-fun-header-word (segment)
2806 (emit-header-data segment simple-fun-header-widetag)))
2808 (define-instruction lra-header-word (segment)
2810 (emit-header-data segment return-pc-header-widetag)))
2812 ;;;; Instructions required to do floating point operations using SSE
2814 ;; Return a one- or two-element list of printers for SSE instructions.
2815 ;; The one-element list is used in the cases where the REX prefix is
2816 ;; really a prefix and thus automatically supported, the two-element
2817 ;; list is used when the REX prefix is used in an infix position.
2818 (eval-when (:compile-toplevel :execute)
2819 (defun sse-inst-printer-list (inst-format-stem prefix opcode
2820 &key more-fields printer)
2821 (let ((fields `(,@(when prefix
2822 `((prefix ,prefix)))
2825 (inst-formats (if prefix
2826 (list (symbolicate "EXT-" inst-format-stem)
2827 (symbolicate "EXT-REX-" inst-format-stem))
2828 (list inst-format-stem))))
2829 (mapcar (lambda (inst-format)
2830 `(,inst-format ,fields ,@(when printer
2833 (defun 2byte-sse-inst-printer-list (inst-format-stem prefix op1 op2
2834 &key more-fields printer)
2835 (let ((fields `(,@(when prefix
2836 `((prefix, prefix)))
2840 (inst-formats (if prefix
2841 (list (symbolicate "EXT-" inst-format-stem)
2842 (symbolicate "EXT-REX-" inst-format-stem))
2843 (list inst-format-stem))))
2844 (mapcar (lambda (inst-format)
2845 `(,inst-format ,fields ,@(when printer
2849 (defun emit-sse-inst (segment dst src prefix opcode
2850 &key operand-size (remaining-bytes 0))
2852 (emit-byte segment prefix))
2854 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
2855 (maybe-emit-rex-for-ea segment src dst))
2856 (emit-byte segment #x0f)
2857 (emit-byte segment opcode)
2858 (emit-ea segment src (reg-tn-encoding dst) :remaining-bytes remaining-bytes))
2860 ;; 0110 0110:0000 1111:0111 00gg: 11 010 xmmreg:imm8
2862 (defun emit-sse-inst-with-imm (segment dst/src imm
2867 (emit-byte segment prefix))
2868 (maybe-emit-rex-prefix segment operand-size dst/src nil nil)
2869 (emit-byte segment #x0F)
2870 (emit-byte segment opcode)
2871 (emit-byte segment (logior (ash (logior #b11000 /i) 3)
2872 (reg-tn-encoding dst/src)))
2873 (emit-byte segment imm))
2875 (defun emit-sse-inst-2byte (segment dst src prefix op1 op2
2876 &key operand-size (remaining-bytes 0))
2878 (emit-byte segment prefix))
2880 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
2881 (maybe-emit-rex-for-ea segment src dst))
2882 (emit-byte segment #x0f)
2883 (emit-byte segment op1)
2884 (emit-byte segment op2)
2885 (emit-ea segment src (reg-tn-encoding dst) :remaining-bytes remaining-bytes))
2888 ((define-imm-sse-instruction (name opcode /i)
2889 `(define-instruction ,name (segment dst/src imm)
2891 ',(sse-inst-printer-list 'xmm-imm #x66 opcode
2892 :more-fields `((/i ,/i))))
2894 (emit-sse-inst-with-imm segment dst/src imm
2896 :operand-size :do-not-set)))))
2897 (define-imm-sse-instruction pslldq #x73 7)
2898 (define-imm-sse-instruction psllw-imm #x71 6)
2899 (define-imm-sse-instruction pslld-imm #x72 6)
2900 (define-imm-sse-instruction psllq-imm #x73 6)
2902 (define-imm-sse-instruction psraw-imm #x71 4)
2903 (define-imm-sse-instruction psrad-imm #x72 4)
2905 (define-imm-sse-instruction psrldq #x73 3)
2906 (define-imm-sse-instruction psrlw-imm #x71 2)
2907 (define-imm-sse-instruction psrld-imm #x72 2)
2908 (define-imm-sse-instruction psrlq-imm #x73 2))
2910 ;;; Emit an SSE instruction that has an XMM register as the destination
2911 ;;; operand and for which the size of the operands is implicitly given
2912 ;;; by the instruction.
2913 (defun emit-regular-sse-inst (segment dst src prefix opcode
2914 &key (remaining-bytes 0))
2915 (aver (xmm-register-p dst))
2916 (emit-sse-inst segment dst src prefix opcode
2917 :operand-size :do-not-set
2918 :remaining-bytes remaining-bytes))
2920 (defun emit-regular-2byte-sse-inst (segment dst src prefix op1 op2
2921 &key (remaining-bytes 0))
2922 (aver (xmm-register-p dst))
2923 (emit-sse-inst-2byte segment dst src prefix op1 op2
2924 :operand-size :do-not-set
2925 :remaining-bytes remaining-bytes))
2927 ;;; Instructions having an XMM register as the destination operand
2928 ;;; and an XMM register or a memory location as the source operand.
2929 ;;; The operand size is implicitly given by the instruction.
2931 (macrolet ((define-regular-sse-inst (name prefix opcode)
2932 `(define-instruction ,name (segment dst src)
2934 ',(sse-inst-printer-list 'xmm-xmm/mem prefix opcode))
2936 (emit-regular-sse-inst segment dst src ,prefix ,opcode)))))
2938 (define-regular-sse-inst andpd #x66 #x54)
2939 (define-regular-sse-inst andps nil #x54)
2940 (define-regular-sse-inst andnpd #x66 #x55)
2941 (define-regular-sse-inst andnps nil #x55)
2942 (define-regular-sse-inst orpd #x66 #x56)
2943 (define-regular-sse-inst orps nil #x56)
2944 (define-regular-sse-inst pand #x66 #xdb)
2945 (define-regular-sse-inst pandn #x66 #xdf)
2946 (define-regular-sse-inst por #x66 #xeb)
2947 (define-regular-sse-inst pxor #x66 #xef)
2948 (define-regular-sse-inst xorpd #x66 #x57)
2949 (define-regular-sse-inst xorps nil #x57)
2951 (define-regular-sse-inst comisd #x66 #x2f)
2952 (define-regular-sse-inst comiss nil #x2f)
2953 (define-regular-sse-inst ucomisd #x66 #x2e)
2954 (define-regular-sse-inst ucomiss nil #x2e)
2955 ;; integer comparison
2956 (define-regular-sse-inst pcmpeqb #x66 #x74)
2957 (define-regular-sse-inst pcmpeqw #x66 #x75)
2958 (define-regular-sse-inst pcmpeqd #x66 #x76)
2959 (define-regular-sse-inst pcmpgtb #x66 #x64)
2960 (define-regular-sse-inst pcmpgtw #x66 #x65)
2961 (define-regular-sse-inst pcmpgtd #x66 #x66)
2963 (define-regular-sse-inst maxpd #x66 #x5f)
2964 (define-regular-sse-inst maxps nil #x5f)
2965 (define-regular-sse-inst maxsd #xf2 #x5f)
2966 (define-regular-sse-inst maxss #xf3 #x5f)
2967 (define-regular-sse-inst minpd #x66 #x5d)
2968 (define-regular-sse-inst minps nil #x5d)
2969 (define-regular-sse-inst minsd #xf2 #x5d)
2970 (define-regular-sse-inst minss #xf3 #x5d)
2972 (define-regular-sse-inst pmaxsw #x66 #xee)
2973 (define-regular-sse-inst pmaxub #x66 #xde)
2974 (define-regular-sse-inst pminsw #x66 #xea)
2975 (define-regular-sse-inst pminub #x66 #xda)
2977 (define-regular-sse-inst addpd #x66 #x58)
2978 (define-regular-sse-inst addps nil #x58)
2979 (define-regular-sse-inst addsd #xf2 #x58)
2980 (define-regular-sse-inst addss #xf3 #x58)
2981 (define-regular-sse-inst divpd #x66 #x5e)
2982 (define-regular-sse-inst divps nil #x5e)
2983 (define-regular-sse-inst divsd #xf2 #x5e)
2984 (define-regular-sse-inst divss #xf3 #x5e)
2985 (define-regular-sse-inst mulpd #x66 #x59)
2986 (define-regular-sse-inst mulps nil #x59)
2987 (define-regular-sse-inst mulsd #xf2 #x59)
2988 (define-regular-sse-inst mulss #xf3 #x59)
2989 (define-regular-sse-inst rcpps nil #x53)
2990 (define-regular-sse-inst rcpss #xf3 #x53)
2991 (define-regular-sse-inst rsqrtps nil #x52)
2992 (define-regular-sse-inst rsqrtss #xf3 #x52)
2993 (define-regular-sse-inst sqrtpd #x66 #x51)
2994 (define-regular-sse-inst sqrtps nil #x51)
2995 (define-regular-sse-inst sqrtsd #xf2 #x51)
2996 (define-regular-sse-inst sqrtss #xf3 #x51)
2997 (define-regular-sse-inst subpd #x66 #x5c)
2998 (define-regular-sse-inst subps nil #x5c)
2999 (define-regular-sse-inst subsd #xf2 #x5c)
3000 (define-regular-sse-inst subss #xf3 #x5c)
3001 (define-regular-sse-inst unpckhpd #x66 #x15)
3002 (define-regular-sse-inst unpckhps nil #x15)
3003 (define-regular-sse-inst unpcklpd #x66 #x14)
3004 (define-regular-sse-inst unpcklps nil #x14)
3005 ;; integer arithmetic
3006 (define-regular-sse-inst paddb #x66 #xfc)
3007 (define-regular-sse-inst paddw #x66 #xfd)
3008 (define-regular-sse-inst paddd #x66 #xfe)
3009 (define-regular-sse-inst paddq #x66 #xd4)
3010 (define-regular-sse-inst paddsb #x66 #xec)
3011 (define-regular-sse-inst paddsw #x66 #xed)
3012 (define-regular-sse-inst paddusb #x66 #xdc)
3013 (define-regular-sse-inst paddusw #x66 #xdd)
3014 (define-regular-sse-inst pavgb #x66 #xe0)
3015 (define-regular-sse-inst pavgw #x66 #xe3)
3016 (define-regular-sse-inst pmaddwd #x66 #xf5)
3017 (define-regular-sse-inst pmulhuw #x66 #xe4)
3018 (define-regular-sse-inst pmulhw #x66 #xe5)
3019 (define-regular-sse-inst pmullw #x66 #xd5)
3020 (define-regular-sse-inst pmuludq #x66 #xf4)
3021 (define-regular-sse-inst psadbw #x66 #xf6)
3022 (define-regular-sse-inst psllw #x66 #xf1)
3023 (define-regular-sse-inst pslld #x66 #xf2)
3024 (define-regular-sse-inst psllq #x66 #xf3)
3025 (define-regular-sse-inst psraw #x66 #xe1)
3026 (define-regular-sse-inst psrad #x66 #xe2)
3027 (define-regular-sse-inst psrlw #x66 #xd1)
3028 (define-regular-sse-inst psrld #x66 #xd2)
3029 (define-regular-sse-inst psrlq #x66 #xd3)
3030 (define-regular-sse-inst psubb #x66 #xf8)
3031 (define-regular-sse-inst psubw #x66 #xf9)
3032 (define-regular-sse-inst psubd #x66 #xfa)
3033 (define-regular-sse-inst psubq #x66 #xfb)
3034 (define-regular-sse-inst psubsb #x66 #xe8)
3035 (define-regular-sse-inst psubsw #x66 #xe9)
3036 (define-regular-sse-inst psubusb #x66 #xd8)
3037 (define-regular-sse-inst psubusw #x66 #xd9)
3039 (define-regular-sse-inst cvtdq2pd #xf3 #xe6)
3040 (define-regular-sse-inst cvtdq2ps nil #x5b)
3041 (define-regular-sse-inst cvtpd2dq #xf2 #xe6)
3042 (define-regular-sse-inst cvtpd2ps #x66 #x5a)
3043 (define-regular-sse-inst cvtps2dq #x66 #x5b)
3044 (define-regular-sse-inst cvtps2pd nil #x5a)
3045 (define-regular-sse-inst cvtsd2ss #xf2 #x5a)
3046 (define-regular-sse-inst cvtss2sd #xf3 #x5a)
3047 (define-regular-sse-inst cvttpd2dq #x66 #xe6)
3048 (define-regular-sse-inst cvttps2dq #xf3 #x5b)
3050 (define-regular-sse-inst packsswb #x66 #x63)
3051 (define-regular-sse-inst packssdw #x66 #x6b)
3052 (define-regular-sse-inst packuswb #x66 #x67)
3053 (define-regular-sse-inst punpckhbw #x66 #x68)
3054 (define-regular-sse-inst punpckhwd #x66 #x69)
3055 (define-regular-sse-inst punpckhdq #x66 #x6a)
3056 (define-regular-sse-inst punpckhqdq #x66 #x6d)
3057 (define-regular-sse-inst punpcklbw #x66 #x60)
3058 (define-regular-sse-inst punpcklwd #x66 #x61)
3059 (define-regular-sse-inst punpckldq #x66 #x62)
3060 (define-regular-sse-inst punpcklqdq #x66 #x6c))
3062 (macrolet ((define-xmm-shuffle-sse-inst (name prefix opcode n-bits radix)
3063 (let ((shuffle-pattern
3064 (intern (format nil "SSE-SHUFFLE-PATTERN-~D-~D"
3066 `(define-instruction ,name (segment dst src pattern)
3068 ',(sse-inst-printer-list
3069 'xmm-xmm/mem prefix opcode
3070 :more-fields `((imm nil :type ,shuffle-pattern))
3071 :printer '(:name :tab reg ", " reg/mem ", " imm)))
3074 (aver (typep pattern '(unsigned-byte ,n-bits)))
3075 (emit-regular-sse-inst segment dst src ,prefix ,opcode
3077 (emit-byte segment pattern))))))
3078 (define-xmm-shuffle-sse-inst pshufd #x66 #x70 8 4)
3079 (define-xmm-shuffle-sse-inst pshufhw #xf3 #x70 8 4)
3080 (define-xmm-shuffle-sse-inst pshuflw #xf2 #x70 8 4)
3081 (define-xmm-shuffle-sse-inst shufpd #x66 #xc6 2 2)
3082 (define-xmm-shuffle-sse-inst shufps nil #xc6 8 4))
3084 ;; MASKMOVDQU (dst is DS:RDI)
3085 (define-instruction maskmovdqu (segment src mask)
3087 (sse-inst-printer-list 'xmm-xmm/mem #x66 #xf7))
3089 (aver (xmm-register-p src))
3090 (aver (xmm-register-p mask))
3091 (emit-regular-sse-inst segment src mask #x66 #xf7)))
3093 (macrolet ((define-comparison-sse-inst (name prefix opcode
3094 name-prefix name-suffix)
3095 `(define-instruction ,name (segment op x y)
3097 ',(sse-inst-printer-list
3098 'xmm-xmm/mem prefix opcode
3099 :more-fields '((imm nil :type sse-condition-code))
3100 :printer `(,name-prefix imm ,name-suffix
3101 :tab reg ", " reg/mem)))
3103 (let ((code (position op *sse-conditions*)))
3105 (emit-regular-sse-inst segment x y ,prefix ,opcode
3107 (emit-byte segment code))))))
3108 (define-comparison-sse-inst cmppd #x66 #xc2 "CMP" "PD")
3109 (define-comparison-sse-inst cmpps nil #xc2 "CMP" "PS")
3110 (define-comparison-sse-inst cmpsd #xf2 #xc2 "CMP" "SD")
3111 (define-comparison-sse-inst cmpss #xf3 #xc2 "CMP" "SS"))
3114 (macrolet ((define-movsd/ss-sse-inst (name prefix)
3115 `(define-instruction ,name (segment dst src)
3117 ',(sse-inst-printer-list 'xmm-xmm/mem-dir
3120 (cond ((xmm-register-p dst)
3121 (emit-sse-inst segment dst src ,prefix #x10
3122 :operand-size :do-not-set))
3124 (aver (xmm-register-p src))
3125 (emit-sse-inst segment src dst ,prefix #x11
3126 :operand-size :do-not-set)))))))
3127 (define-movsd/ss-sse-inst movsd #xf2)
3128 (define-movsd/ss-sse-inst movss #xf3))
3131 (macrolet ((define-mov-sse-inst (name prefix opcode-from opcode-to
3132 &key force-to-mem reg-reg-name)
3135 `(define-instruction ,reg-reg-name (segment dst src)
3137 (aver (xmm-register-p dst))
3138 (aver (xmm-register-p src))
3139 (emit-regular-sse-inst segment dst src
3140 ,prefix ,opcode-from))))
3141 (define-instruction ,name (segment dst src)
3143 '(,@(when opcode-from
3144 (sse-inst-printer-list
3145 'xmm-xmm/mem prefix opcode-from))
3146 ,@(sse-inst-printer-list
3147 'xmm-xmm/mem prefix opcode-to
3148 :printer '(:name :tab reg/mem ", " reg))))
3150 (cond ,@(when opcode-from
3151 `(((xmm-register-p dst)
3153 `(aver (not (or (register-p src)
3154 (xmm-register-p src)))))
3155 (emit-regular-sse-inst
3156 segment dst src ,prefix ,opcode-from))))
3158 (aver (xmm-register-p src))
3160 `(aver (not (or (register-p dst)
3161 (xmm-register-p dst)))))
3162 (emit-regular-sse-inst segment src dst
3163 ,prefix ,opcode-to))))))))
3165 (define-mov-sse-inst movapd #x66 #x28 #x29)
3166 (define-mov-sse-inst movaps nil #x28 #x29)
3167 (define-mov-sse-inst movdqa #x66 #x6f #x7f)
3168 (define-mov-sse-inst movdqu #xf3 #x6f #x7f)
3171 (define-mov-sse-inst movntdq #x66 nil #xe7 :force-to-mem t)
3172 (define-mov-sse-inst movntpd #x66 nil #x2b :force-to-mem t)
3173 (define-mov-sse-inst movntps nil nil #x2b :force-to-mem t)
3175 ;; use movhps for movlhps and movlps for movhlps
3176 (define-mov-sse-inst movhpd #x66 #x16 #x17 :force-to-mem t)
3177 (define-mov-sse-inst movhps nil #x16 #x17 :reg-reg-name movlhps)
3178 (define-mov-sse-inst movlpd #x66 #x12 #x13 :force-to-mem t)
3179 (define-mov-sse-inst movlps nil #x12 #x13 :reg-reg-name movhlps)
3180 (define-mov-sse-inst movupd #x66 #x10 #x11)
3181 (define-mov-sse-inst movups nil #x10 #x11))
3184 (define-instruction movq (segment dst src)
3187 (sse-inst-printer-list 'xmm-xmm/mem #xf3 #x7e)
3188 (sse-inst-printer-list 'xmm-xmm/mem #x66 #xd6
3189 :printer '(:name :tab reg/mem ", " reg))))
3191 (cond ((xmm-register-p dst)
3192 (emit-sse-inst segment dst src #xf3 #x7e
3193 :operand-size :do-not-set))
3195 (aver (xmm-register-p src))
3196 (emit-sse-inst segment src dst #x66 #xd6
3197 :operand-size :do-not-set)))))
3199 ;;; Instructions having an XMM register as the destination operand
3200 ;;; and a general-purpose register or a memory location as the source
3201 ;;; operand. The operand size is calculated from the source operand.
3203 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
3204 ;;; a memory location to the low order 32 or 64 bits of an XMM register
3205 ;;; with zero extension or vice versa.
3206 ;;; We do not support the MMX version of this instruction.
3207 (define-instruction movd (segment dst src)
3210 (sse-inst-printer-list 'xmm-reg/mem #x66 #x6e)
3211 (sse-inst-printer-list 'xmm-reg/mem #x66 #x7e
3212 :printer '(:name :tab reg/mem ", " reg))))
3214 (cond ((xmm-register-p dst)
3215 (emit-sse-inst segment dst src #x66 #x6e))
3217 (aver (xmm-register-p src))
3218 (emit-sse-inst segment src dst #x66 #x7e)))))
3220 (define-instruction pinsrw (segment dst src imm)
3222 (sse-inst-printer-list
3223 'xmm-reg/mem #x66 #xc4
3224 :more-fields '((imm nil :type imm-byte))
3225 :printer '(:name :tab reg ", " reg/mem ", " imm)))
3227 (aver (xmm-register-p dst))
3228 (let ((src-size (operand-size src)))
3229 (aver (or (not (register-p src))
3230 (eq src-size :qword) (eq src-size :dword)))
3231 (emit-sse-inst segment dst src #x66 #xc4
3232 :operand-size (if (register-p src) src-size :do-not-set)
3233 :remaining-bytes 1))
3234 (emit-byte segment imm)))
3236 (define-instruction pextrw (segment dst src imm)
3238 (sse-inst-printer-list
3239 'reg-xmm/mem #x66 #xc5
3240 :more-fields '((imm nil :type imm-byte))
3241 :printer '(:name :tab reg ", " reg/mem ", " imm)))
3243 (aver (xmm-register-p src))
3244 (aver (register-p dst))
3245 (let ((dst-size (operand-size dst)))
3246 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3247 (emit-sse-inst segment dst src #x66 #xc5
3248 :operand-size dst-size
3249 :remaining-bytes 1))
3250 (emit-byte segment imm)))
3252 (macrolet ((define-integer-source-sse-inst (name prefix opcode &key mem-only)
3253 `(define-instruction ,name (segment dst src)
3255 ',(sse-inst-printer-list 'xmm-reg/mem prefix opcode))
3257 (aver (xmm-register-p dst))
3259 `(aver (not (or (register-p src)
3260 (xmm-register-p src)))))
3261 (let ((src-size (operand-size src)))
3262 (aver (or (eq src-size :qword) (eq src-size :dword))))
3263 (emit-sse-inst segment dst src ,prefix ,opcode)))))
3264 (define-integer-source-sse-inst cvtsi2sd #xf2 #x2a)
3265 (define-integer-source-sse-inst cvtsi2ss #xf3 #x2a)
3266 ;; FIXME: memory operand is always a QWORD
3267 (define-integer-source-sse-inst cvtpi2pd #x66 #x2a :mem-only t)
3268 (define-integer-source-sse-inst cvtpi2ps nil #x2a :mem-only t))
3270 ;;; Instructions having a general-purpose register as the destination
3271 ;;; operand and an XMM register or a memory location as the source
3272 ;;; operand. The operand size is calculated from the destination
3275 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode &key reg-only)
3276 `(define-instruction ,name (segment dst src)
3278 ',(sse-inst-printer-list 'reg-xmm/mem prefix opcode))
3280 (aver (register-p dst))
3282 `(aver (xmm-register-p src)))
3283 (let ((dst-size (operand-size dst)))
3284 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3285 (emit-sse-inst segment dst src ,prefix ,opcode
3286 :operand-size dst-size))))))
3287 (define-gpr-destination-sse-inst cvtsd2si #xf2 #x2d)
3288 (define-gpr-destination-sse-inst cvtss2si #xf3 #x2d)
3289 (define-gpr-destination-sse-inst cvttsd2si #xf2 #x2c)
3290 (define-gpr-destination-sse-inst cvttss2si #xf3 #x2c)
3291 (define-gpr-destination-sse-inst movmskpd #x66 #x50 :reg-only t)
3292 (define-gpr-destination-sse-inst movmskps nil #x50 :reg-only t)
3293 (define-gpr-destination-sse-inst pmovmskb #x66 #xd7 :reg-only t))
3295 ;;;; We call these "2byte" instructions due to their two opcode bytes.
3296 ;;;; Intel and AMD call them three-byte instructions, as they count the
3297 ;;;; 0x0f byte for determining the number of opcode bytes.
3299 ;;; Instructions that take XMM-XMM/MEM and XMM-XMM/MEM-IMM arguments.
3301 (macrolet ((regular-2byte-sse-inst (name prefix op1 op2)
3302 `(define-instruction ,name (segment dst src)
3304 ',(2byte-sse-inst-printer-list '2byte-xmm-xmm/mem prefix op1 op2))
3306 (emit-regular-2byte-sse-inst segment dst src ,prefix ,op1 ,op2))))
3307 (regular-2byte-sse-inst-imm (name prefix op1 op2)
3308 `(define-instruction ,name (segment dst src imm)
3310 ',(2byte-sse-inst-printer-list '2byte-xmm-xmm/mem prefix op1 op2
3311 :more-fields '((imm nil :type imm-byte))
3312 :printer `(:name :tab reg ", " reg/mem ", " imm)))
3314 (aver (typep imm '(unsigned-byte 8)))
3315 (emit-regular-2byte-sse-inst segment dst src ,prefix ,op1 ,op2
3317 (emit-byte segment imm)))))
3318 (regular-2byte-sse-inst pshufb #x66 #x38 #x00)
3319 (regular-2byte-sse-inst phaddw #x66 #x38 #x01)
3320 (regular-2byte-sse-inst phaddd #x66 #x38 #x02)
3321 (regular-2byte-sse-inst phaddsw #x66 #x38 #x03)
3322 (regular-2byte-sse-inst pmaddubsw #x66 #x38 #x04)
3323 (regular-2byte-sse-inst phsubw #x66 #x38 #x05)
3324 (regular-2byte-sse-inst phsubd #x66 #x38 #x06)
3325 (regular-2byte-sse-inst phsubsw #x66 #x38 #x07)
3326 (regular-2byte-sse-inst psignb #x66 #x38 #x08)
3327 (regular-2byte-sse-inst psignw #x66 #x38 #x09)
3328 (regular-2byte-sse-inst psignd #x66 #x38 #x0a)
3329 (regular-2byte-sse-inst pmulhrsw #x66 #x38 #x0b)
3331 (regular-2byte-sse-inst pblendvb #x66 #x38 #x10)
3332 (regular-2byte-sse-inst blendvps #x66 #x38 #x14)
3333 (regular-2byte-sse-inst blendvpd #x66 #x38 #x15)
3334 (regular-2byte-sse-inst ptest #x66 #x38 #x17)
3335 (regular-2byte-sse-inst pabsb #x66 #x38 #x1c)
3336 (regular-2byte-sse-inst pabsw #x66 #x38 #x1d)
3337 (regular-2byte-sse-inst pabsd #x66 #x38 #x1e)
3339 (regular-2byte-sse-inst pmuldq #x66 #x38 #x28)
3340 (regular-2byte-sse-inst pcmpeqq #x66 #x38 #x29)
3341 (regular-2byte-sse-inst packusdw #x66 #x38 #x2b)
3343 (regular-2byte-sse-inst pcmpgtq #x66 #x38 #x37)
3344 (regular-2byte-sse-inst pminsb #x66 #x38 #x38)
3345 (regular-2byte-sse-inst pminsd #x66 #x38 #x39)
3346 (regular-2byte-sse-inst pminuw #x66 #x38 #x3a)
3347 (regular-2byte-sse-inst pminud #x66 #x38 #x3b)
3348 (regular-2byte-sse-inst pmaxsb #x66 #x38 #x3c)
3349 (regular-2byte-sse-inst pmaxsd #x66 #x38 #x3d)
3350 (regular-2byte-sse-inst pmaxuw #x66 #x38 #x3e)
3351 (regular-2byte-sse-inst pmaxud #x66 #x38 #x3f)
3353 (regular-2byte-sse-inst pmulld #x66 #x38 #x40)
3354 (regular-2byte-sse-inst phminposuw #x66 #x38 #x41)
3356 (regular-2byte-sse-inst aesimc #x66 #x38 #xdb)
3357 (regular-2byte-sse-inst aesenc #x66 #x38 #xdc)
3358 (regular-2byte-sse-inst aesenclast #x66 #x38 #xdd)
3359 (regular-2byte-sse-inst aesdec #x66 #x38 #xde)
3360 (regular-2byte-sse-inst aesdeclast #x66 #x38 #xdf)
3362 (regular-2byte-sse-inst-imm roundps #x66 #x3a #x08)
3363 (regular-2byte-sse-inst-imm roundpd #x66 #x3a #x09)
3364 (regular-2byte-sse-inst-imm roundss #x66 #x3a #x0a)
3365 (regular-2byte-sse-inst-imm roundsd #x66 #x3a #x0b)
3366 (regular-2byte-sse-inst-imm blendps #x66 #x3a #x0c)
3367 (regular-2byte-sse-inst-imm blendpd #x66 #x3a #x0d)
3368 (regular-2byte-sse-inst-imm pblendw #x66 #x3a #x0e)
3369 (regular-2byte-sse-inst-imm palignr #x66 #x3a #x0f)
3371 (regular-2byte-sse-inst-imm mpsadbw #x66 #x3a #x42)
3372 (regular-2byte-sse-inst-imm pclmulqdq #x66 #x3a #x44)
3374 (regular-2byte-sse-inst-imm pcmpestrm #x66 #x3a #x60)
3375 (regular-2byte-sse-inst-imm pcmpestri #x66 #x3a #x61)
3376 (regular-2byte-sse-inst-imm pcmpistrm #x66 #x3a #x62)
3377 (regular-2byte-sse-inst-imm pcmpistri #x66 #x3a #x63)
3379 (regular-2byte-sse-inst-imm aeskeygenassist #x66 #x3a #xdf))
3381 ;;; Other SSE instructions
3383 ;; FIXME: is that right!?
3384 (define-instruction movnti (segment dst src)
3385 (:printer ext-reg-reg/mem-no-width ((op #xc3)))
3387 (aver (not (or (register-p dst)
3388 (xmm-register-p dst))))
3389 (aver (register-p src))
3390 (maybe-emit-rex-for-ea segment src dst)
3391 (emit-byte segment #x0f)
3392 (emit-byte segment #xc3)
3393 (emit-ea segment dst (reg-tn-encoding src))))
3395 (define-instruction prefetch (segment type src)
3396 (:printer ext-reg/mem-no-width ((op '(#x18 0)))
3397 '("PREFETCHNTA" :tab reg/mem))
3398 (:printer ext-reg/mem-no-width ((op '(#x18 1)))
3399 '("PREFETCHT0" :tab reg/mem))
3400 (:printer ext-reg/mem-no-width ((op '(#x18 2)))
3401 '("PREFETCHT1" :tab reg/mem))
3402 (:printer ext-reg/mem-no-width ((op '(#x18 3)))
3403 '("PREFETCHT2" :tab reg/mem))
3405 (aver (not (or (register-p src)
3406 (xmm-register-p src))))
3407 (aver (eq (operand-size src) :byte))
3408 (let ((type (position type #(:nta :t0 :t1 :t2))))
3410 (maybe-emit-rex-for-ea segment src nil)
3411 (emit-byte segment #x0f)
3412 (emit-byte segment #x18)
3413 (emit-ea segment src type))))
3415 (define-instruction clflush (segment src)
3416 (:printer ext-reg/mem-no-width ((op '(#xae 7))))
3418 (aver (not (or (register-p src)
3419 (xmm-register-p src))))
3420 (aver (eq (operand-size src) :byte))
3421 (maybe-emit-rex-for-ea segment src nil)
3422 (emit-byte segment #x0f)
3423 (emit-byte segment #xae)
3424 (emit-ea segment src 7)))
3426 (macrolet ((define-fence-instruction (name last-byte)
3427 `(define-instruction ,name (segment)
3428 (:printer three-bytes ((op '(#x0f #xae ,last-byte))))
3430 (emit-byte segment #x0f)
3431 (emit-byte segment #xae)
3432 (emit-byte segment ,last-byte)))))
3433 (define-fence-instruction lfence #b11101000)
3434 (define-fence-instruction mfence #b11110000)
3435 (define-fence-instruction sfence #b11111000))
3437 (define-instruction pause (segment)
3438 (:printer two-bytes ((op '(#xf3 #x90))))
3440 (emit-byte segment #xf3)
3441 (emit-byte segment #x90)))
3443 (define-instruction ldmxcsr (segment src)
3444 (:printer ext-reg/mem-no-width ((op '(#xae 2))))
3446 (aver (not (or (register-p src)
3447 (xmm-register-p src))))
3448 (aver (eq (operand-size src) :dword))
3449 (maybe-emit-rex-for-ea segment src nil)
3450 (emit-byte segment #x0f)
3451 (emit-byte segment #xae)
3452 (emit-ea segment src 2)))
3454 (define-instruction stmxcsr (segment dst)
3455 (:printer ext-reg/mem-no-width ((op '(#xae 3))))
3457 (aver (not (or (register-p dst)
3458 (xmm-register-p dst))))
3459 (aver (eq (operand-size dst) :dword))
3460 (maybe-emit-rex-for-ea segment dst nil)
3461 (emit-byte segment #x0f)
3462 (emit-byte segment #xae)
3463 (emit-ea segment dst 3)))
3465 (define-instruction popcnt (segment dst src)
3466 (:printer-list `((f3-escape-reg-reg/mem ((op #xB8)))
3467 (rex-f3-escape-reg-reg/mem ((op #xB8)))))
3469 (aver (register-p dst))
3470 (let ((size (matching-operand-size dst src)))
3471 (maybe-emit-operand-size-prefix segment size)
3472 (emit-byte segment #xF3)
3473 (maybe-emit-rex-for-ea segment src dst)
3474 (emit-byte segment #x0F)
3475 (emit-byte segment #xB8)
3476 (emit-ea segment src (reg-tn-encoding dst)))))
3480 (define-instruction cpuid (segment)
3481 (:printer two-bytes ((op '(#b00001111 #b10100010))))
3483 (emit-byte segment #b00001111)
3484 (emit-byte segment #b10100010)))
3486 (define-instruction rdtsc (segment)
3487 (:printer two-bytes ((op '(#b00001111 #b00110001))))
3489 (emit-byte segment #b00001111)
3490 (emit-byte segment #b00110001)))
3492 ;;;; Late VM definitions
3494 (defun canonicalize-inline-constant (constant &aux (alignedp nil))
3495 (let ((first (car constant)))
3496 (when (eql first :aligned)
3499 (setf first (car constant)))
3501 (single-float (setf constant (list :single-float first)))
3502 (double-float (setf constant (list :double-float first)))
3503 ((complex single-float)
3504 (setf constant (list :complex-single-float first)))
3505 ((complex double-float)
3506 (setf constant (list :complex-double-float first)))))
3507 (destructuring-bind (type value) constant
3509 ((:byte :word :dword :qword)
3510 (aver (integerp value))
3513 (aver (base-char-p value))
3514 (cons :byte (char-code value)))
3516 (aver (characterp value))
3517 (cons :dword (char-code value)))
3519 (aver (typep value 'single-float))
3520 (cons (if alignedp :oword :dword)
3521 (ldb (byte 32 0) (single-float-bits value))))
3523 (aver (typep value 'double-float))
3524 (cons (if alignedp :oword :qword)
3525 (ldb (byte 64 0) (logior (ash (double-float-high-bits value) 32)
3526 (double-float-low-bits value)))))
3527 ((:complex-single-float)
3528 (aver (typep value '(complex single-float)))
3529 (cons (if alignedp :oword :qword)
3531 (logior (ash (single-float-bits (imagpart value)) 32)
3533 (single-float-bits (realpart value)))))))
3535 (aver (integerp value))
3536 (cons :oword value))
3537 ((:complex-double-float)
3538 (aver (typep value '(complex double-float)))
3540 (logior (ash (double-float-high-bits (imagpart value)) 96)
3541 (ash (double-float-low-bits (imagpart value)) 64)
3542 (ash (ldb (byte 32 0)
3543 (double-float-high-bits (realpart value)))
3545 (double-float-low-bits (realpart value))))))))
3547 (defun inline-constant-value (constant)
3548 (let ((label (gen-label))
3549 (size (ecase (car constant)
3550 ((:byte :word :dword :qword) (car constant))
3551 ((:oword) :qword))))
3552 (values label (make-ea size
3553 :disp (make-fixup nil :code-object label)))))
3555 (defun emit-constant-segment-header (segment constants optimize)
3556 (declare (ignore constants))
3557 (emit-long-nop segment (if optimize 64 16)))
3559 (defun size-nbyte (size)
3567 (defun sort-inline-constants (constants)
3568 (stable-sort constants #'> :key (lambda (constant)
3569 (size-nbyte (caar constant)))))
3571 (defun emit-inline-constant (constant label)
3572 (let ((size (size-nbyte (car constant))))
3573 (emit-alignment (integer-length (1- size)))
3575 (let ((val (cdr constant)))
3577 do (inst byte (ldb (byte 8 0) val))
3578 (setf val (ash val -8))))))