1 ;;;; that part of the description of the x86 instruction set (for
2 ;;;; 80386 and above) 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. r8-15 are handled separately
23 (deftype reg () '(unsigned-byte 3))
25 ;; This includes legacy records and r8-16
26 (deftype full-reg () '(unsigned-byte 4))
28 ;;; default word size for the chip: if the operand size !=:dword
29 ;;; we need to output #x66 (or REX) prefix
30 (def!constant +default-operand-size+ :dword)
32 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
34 (defun offset-next (value dstate)
35 (declare (type integer value)
36 (type sb!disassem:disassem-state dstate))
37 (+ (sb!disassem:dstate-next-addr dstate) value))
39 (defparameter *default-address-size*
40 ;; Again, this is the chip default, not the SBCL backend preference
41 ;; which must be set with prefixes if it's different. It's :dword;
42 ;; this is not negotiable
45 (defparameter *byte-reg-names*
46 #(al cl dl bl sil dil r8b r9b r10b r11b r14b r15b))
47 (defparameter *word-reg-names*
48 #(ax cx dx bx sp bp si di))
49 (defparameter *dword-reg-names*
50 #(eax ecx edx ebx esp ebp esi edi))
51 (defparameter *qword-reg-names*
52 #(rax rcx rdx rbx rsp rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15))
54 (defun print-reg-with-width (value width stream dstate)
55 (declare (ignore dstate)
56 (type full-reg value))
57 (princ (aref (ecase width
58 (:byte *byte-reg-names*)
59 (:word *word-reg-names*)
60 (:dword *dword-reg-names*)
61 (:qword *qword-reg-names*))
64 ;; XXX plus should do some source-var notes
67 (defun print-reg (value stream dstate)
68 (declare (type full-reg value)
70 (type sb!disassem:disassem-state dstate))
71 (print-reg-with-width value
72 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
73 *default-address-size*)
77 (defun print-word-reg (value stream dstate)
78 (declare (type (or full-reg list) value)
80 (type sb!disassem:disassem-state dstate))
82 (if (consp value) (car value) value)
83 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
84 +default-operand-size+)
88 (defun print-byte-reg (value stream dstate)
89 (declare (type full-reg value)
91 (type sb!disassem:disassem-state dstate))
92 (print-reg-with-width value :byte stream dstate))
94 (defun print-addr-reg (value stream dstate)
95 (declare (type full-reg value)
97 (type sb!disassem:disassem-state dstate))
98 (print-reg-with-width value
99 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
100 *default-address-size*)
103 (defun print-rex-reg/mem (value stream dstate)
104 (declare (type (or list full-reg) value)
106 (type sb!disassem:disassem-state dstate))
107 (if (typep value 'full-reg)
108 (print-reg value stream dstate)
109 (print-mem-access value stream nil dstate)))
111 (defun print-reg/mem (value stream dstate)
112 (declare (type (or list full-reg) value)
114 (type sb!disassem:disassem-state dstate))
115 (if (typep value 'full-reg)
116 (print-reg value stream dstate)
117 (print-mem-access value stream nil dstate)))
119 ;; Same as print-reg/mem, but prints an explicit size indicator for
120 ;; memory references.
121 (defun print-sized-reg/mem (value stream dstate)
122 (declare (type (or list full-reg) value)
124 (type sb!disassem:disassem-state dstate))
125 (if (typep value 'full-reg)
126 (print-reg value stream dstate)
127 (print-mem-access value stream t dstate)))
129 (defun print-byte-reg/mem (value stream dstate)
130 (declare (type (or list full-reg) value)
132 (type sb!disassem:disassem-state dstate))
133 (if (typep value 'full-reg)
134 (print-byte-reg value stream dstate)
135 (print-mem-access value stream t dstate)))
137 (defun print-word-reg/mem (value stream dstate)
138 (declare (type (or list full-reg) value)
140 (type sb!disassem:disassem-state dstate))
141 (if (typep value 'full-reg)
142 (print-word-reg value stream dstate)
143 (print-mem-access value stream nil dstate)))
145 (defun print-label (value stream dstate)
146 (declare (ignore dstate))
147 (sb!disassem:princ16 value stream))
149 (defun prefilter-word-reg (value dstate)
150 (declare (type (or full-reg list) value))
153 (let ((reg (first value))
154 (rex.wrxb (second value)))
155 (declare (type (or null (unsigned-byte 4)) rex.wrxb)
156 (type (unsigned-byte 3) reg))
157 (setf (sb!disassem:dstate-get-prop dstate 'reg-width)
158 (if (and rex.wrxb (plusp (logand rex.wrxb #b1000)))
160 +default-operand-size+))
161 (if (plusp (logand rex.wrxb #b0100))
165 ;;; Returns either an integer, meaning a register, or a list of
166 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
167 ;;; may be missing or nil to indicate that it's not used or has the
168 ;;; obvious default value (e.g., 1 for the index-scale).
169 (defun prefilter-reg/mem (value dstate)
170 (declare (type list value)
171 (type sb!disassem:disassem-state dstate))
172 (let ((mod (first value))
174 (rex.wrxb (third value)))
175 (declare (type (unsigned-byte 2) mod)
176 (type (unsigned-byte 3) r/m)
177 (type (or null (unsigned-byte 4)) rex.wrxb))
179 (setf (sb!disassem:dstate-get-prop dstate 'reg-width)
180 (if (and rex.wrxb (plusp (logand rex.wrxb #b1000)))
182 +default-operand-size+))
184 (let ((full-reg (if (and rex.wrxb (plusp (logand rex.wrxb #b0001)))
186 (setf (sb!disassem:dstate-get-prop dstate 'reg-width)
190 (declare (type full-reg full-reg))
196 (let ((sib (sb!disassem:read-suffix 8 dstate)))
197 (declare (type (unsigned-byte 8) sib))
198 (let ((base-reg (ldb (byte 3 0) sib))
199 (index-reg (ldb (byte 3 3) sib))
200 (index-scale (ldb (byte 2 6) sib)))
201 (declare (type (unsigned-byte 3) base-reg index-reg)
202 (type (unsigned-byte 2) index-scale))
206 (if (= base-reg #b101)
207 (sb!disassem:read-signed-suffix 32 dstate)
210 (sb!disassem:read-signed-suffix 8 dstate))
212 (sb!disassem:read-signed-suffix 32 dstate)))))
213 (list (if (and (= mod #b00) (= base-reg #b101)) nil base-reg)
215 (if (= index-reg #b100) nil index-reg)
216 (ash 1 index-scale))))))
217 ((and (= mod #b00) (= r/m #b101))
218 (list nil (sb!disassem:read-signed-suffix 32 dstate)) )
222 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
224 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
227 ;;; This is a sort of bogus prefilter that just stores the info globally for
228 ;;; other people to use; it probably never gets printed.
229 (defun prefilter-width (value dstate)
230 (setf (sb!disassem:dstate-get-prop dstate 'width)
232 (setf (sb!disassem:dstate-get-prop dstate 'reg-width)
235 ;; set by a prefix instruction
236 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
237 +default-operand-size+)))
238 (when (not (eql reg-width +default-operand-size+))
240 (setf (sb!disassem:dstate-get-prop dstate 'reg-width)
241 +default-operand-size+))
244 (defun read-address (value dstate)
245 (declare (ignore value)) ; always nil anyway
246 (sb!disassem:read-suffix (width-bits *default-address-size*) dstate))
248 (defun width-bits (width)
259 ;;;; disassembler argument types
261 (sb!disassem:define-arg-type displacement
263 :use-label #'offset-next
264 :printer (lambda (value stream dstate)
265 (sb!disassem:maybe-note-assembler-routine value nil dstate)
266 (print-label value stream dstate)))
268 (sb!disassem:define-arg-type accum
269 :printer (lambda (value stream dstate)
270 (declare (ignore value)
272 (type sb!disassem:disassem-state dstate))
273 (print-reg 0 stream dstate)))
275 (sb!disassem:define-arg-type word-accum
276 :printer (lambda (value stream dstate)
277 (declare (ignore value)
279 (type sb!disassem:disassem-state dstate))
280 (print-word-reg 0 stream dstate)))
282 (sb!disassem:define-arg-type reg
283 :printer #'print-reg)
285 (sb!disassem:define-arg-type addr-reg
286 :printer #'print-addr-reg)
288 (sb!disassem:define-arg-type word-reg
289 :prefilter #'prefilter-word-reg
290 :printer (lambda (value stream dstate)
291 (print-word-reg value stream dstate)))
294 (sb!disassem:define-arg-type imm-addr
295 :prefilter #'read-address
296 :printer #'print-label)
298 (sb!disassem:define-arg-type imm-data
299 :prefilter (lambda (value dstate)
300 (declare (ignore value)) ; always nil anyway
301 (sb!disassem:read-suffix
303 (or (sb!disassem:dstate-get-prop dstate 'width)
304 *default-address-size*))
307 (sb!disassem:define-arg-type signed-imm-data
308 :prefilter (lambda (value dstate)
309 (declare (ignore value)) ; always nil anyway
310 (let ((width (or (sb!disassem:dstate-get-prop dstate 'width)
311 *default-address-size*)))
312 (sb!disassem:read-signed-suffix (width-bits width) dstate))))
314 (sb!disassem:define-arg-type signed-imm-byte
315 :prefilter (lambda (value dstate)
316 (declare (ignore value)) ; always nil anyway
317 (sb!disassem:read-signed-suffix 8 dstate)))
319 (sb!disassem:define-arg-type signed-imm-dword
320 :prefilter (lambda (value dstate)
321 (declare (ignore value)) ; always nil anyway
322 (sb!disassem:read-signed-suffix 32 dstate)))
324 (sb!disassem:define-arg-type imm-word
325 :prefilter (lambda (value dstate)
326 (declare (ignore value)) ; always nil anyway
328 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
329 +default-operand-size+)))
330 (sb!disassem:read-suffix (width-bits width) dstate))))
332 ;;; needed for the ret imm16 instruction
333 (sb!disassem:define-arg-type imm-word-16
334 :prefilter (lambda (value dstate)
335 (declare (ignore value)) ; always nil anyway
336 (sb!disassem:read-suffix 16 dstate)))
338 (sb!disassem:define-arg-type reg/mem
339 :prefilter #'prefilter-reg/mem
340 :printer #'print-reg/mem)
341 (sb!disassem:define-arg-type sized-reg/mem
342 ;; Same as reg/mem, but prints an explicit size indicator for
343 ;; memory references.
344 :prefilter #'prefilter-reg/mem
345 :printer #'print-sized-reg/mem)
346 (sb!disassem:define-arg-type byte-reg/mem
347 :prefilter #'prefilter-reg/mem
348 :printer #'print-byte-reg/mem)
349 (sb!disassem:define-arg-type word-reg/mem
350 :prefilter #'prefilter-reg/mem
351 :printer #'print-word-reg/mem)
353 (sb!disassem:define-arg-type rex-reg/mem
354 :prefilter #'prefilter-reg/mem
355 :printer #'print-rex-reg/mem)
356 (sb!disassem:define-arg-type sized-rex-reg/mem
357 ;; Same as reg/mem, but prints an explicit size indicator for
358 ;; memory references.
359 :prefilter #'prefilter-reg/mem
360 :printer #'print-sized-reg/mem)
363 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
364 (defun print-fp-reg (value stream dstate)
365 (declare (ignore dstate))
366 (format stream "FR~D" value))
367 (defun prefilter-fp-reg (value dstate)
369 (declare (ignore dstate))
372 (sb!disassem:define-arg-type fp-reg
373 :prefilter #'prefilter-fp-reg
374 :printer #'print-fp-reg)
376 (sb!disassem:define-arg-type width
377 :prefilter #'prefilter-width
378 :printer (lambda (value stream dstate)
381 (and (numberp value) (zerop value))) ; zzz jrd
384 ;; set by a prefix instruction
385 (or (sb!disassem:dstate-get-prop dstate 'reg-width)
386 +default-operand-size+)))
387 (princ (schar (symbol-name reg-width) 0) stream)))))
389 (eval-when (:compile-toplevel :load-toplevel :execute)
390 (defparameter *conditions*
393 (:b . 2) (:nae . 2) (:c . 2)
394 (:nb . 3) (:ae . 3) (:nc . 3)
395 (:eq . 4) (:e . 4) (:z . 4)
402 (:np . 11) (:po . 11)
403 (:l . 12) (:nge . 12)
404 (:nl . 13) (:ge . 13)
405 (:le . 14) (:ng . 14)
406 (:nle . 15) (:g . 15)))
407 (defparameter *condition-name-vec*
408 (let ((vec (make-array 16 :initial-element nil)))
409 (dolist (cond *conditions*)
410 (when (null (aref vec (cdr cond)))
411 (setf (aref vec (cdr cond)) (car cond))))
415 ;;; Set assembler parameters. (In CMU CL, this was done with
416 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
417 (eval-when (:compile-toplevel :load-toplevel :execute)
418 (setf sb!assem:*assem-scheduler-p* nil))
420 (sb!disassem:define-arg-type condition-code
421 :printer *condition-name-vec*)
423 (defun conditional-opcode (condition)
424 (cdr (assoc condition *conditions* :test #'eq)))
426 ;;;; disassembler instruction formats
428 (eval-when (:compile-toplevel :execute)
429 (defun swap-if (direction field1 separator field2)
430 `(:if (,direction :constant 0)
431 (,field1 ,separator ,field2)
432 (,field2 ,separator ,field1))))
434 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
435 (op :field (byte 8 0))
440 (sb!disassem:define-instruction-format (simple 8)
441 (op :field (byte 7 1))
442 (width :field (byte 1 0) :type 'width)
447 (sb!disassem:define-instruction-format (rex-simple 16)
448 (rex :field (byte 4 4) :value #b0100)
449 (wrxb :field (byte 4 0))
450 (op :field (byte 7 9))
451 (width :field (byte 1 8) :type 'width)
456 ;;; Same as simple, but with direction bit
457 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
458 (op :field (byte 6 2))
459 (dir :field (byte 1 1)))
461 ;;; Same as simple, but with the immediate value occurring by default,
462 ;;; and with an appropiate printer.
463 (sb!disassem:define-instruction-format (accum-imm 8
465 :default-printer '(:name
466 :tab accum ", " imm))
467 (imm :type 'imm-data))
469 (sb!disassem:define-instruction-format (rex-accum-imm 16
471 :default-printer '(:name
472 :tab accum ", " imm))
473 (imm :type 'imm-data))
475 (sb!disassem:define-instruction-format (reg-no-width 8
476 :default-printer '(:name :tab reg))
477 (op :field (byte 5 3))
478 (reg :field (byte 3 0) :type 'word-reg)
480 (accum :type 'word-accum)
483 (sb!disassem:define-instruction-format (rex-reg-no-width 16
484 :default-printer '(:name :tab reg))
485 (rex :field (byte 4 4) :value #b0100)
486 (op :field (byte 5 11))
487 (reg :fields (list (byte 3 8) (byte 4 0)) :type 'word-reg)
489 (accum :type 'word-accum)
492 (sb!disassem:define-instruction-format (modrm-reg-no-width 24
493 :default-printer '(:name :tab reg))
494 (rex :field (byte 4 4) :value #b0100)
495 (ff :field (byte 8 8) :value #b11111111)
496 (mod :field (byte 2 22))
497 (modrm-reg :field (byte 3 19))
498 (reg :fields (list (byte 3 16) (byte 4 0)) :type 'word-reg)
500 (accum :type 'word-accum)
503 ;;; adds a width field to reg-no-width
504 (sb!disassem:define-instruction-format (reg 8
505 :default-printer '(:name :tab reg))
506 (op :field (byte 4 4))
507 (width :field (byte 1 3) :type 'width)
508 (reg :field (byte 3 0) :type 'reg)
514 (sb!disassem:define-instruction-format (rex-reg 16
515 :default-printer '(:name :tab reg))
516 (rex :field (byte 4 4) :value #b0100)
517 (op :field (byte 5 11))
518 (reg :field (byte 3 8) :type 'reg)
524 ;;; Same as reg, but with direction bit
525 (sb!disassem:define-instruction-format (reg-dir 8 :include 'reg)
526 (op :field (byte 3 5))
527 (dir :field (byte 1 4)))
529 (sb!disassem:define-instruction-format (two-bytes 16
530 :default-printer '(:name))
531 (op :fields (list (byte 8 0) (byte 8 8))))
533 (sb!disassem:define-instruction-format (reg-reg/mem 16
535 `(:name :tab reg ", " reg/mem))
536 (op :field (byte 7 1))
537 (width :field (byte 1 0) :type 'width)
538 (reg/mem :fields (list (byte 2 14) (byte 3 8))
540 (reg :field (byte 3 11) :type 'reg)
544 (sb!disassem:define-instruction-format (rex-reg-reg/mem 24
546 `(:name :tab reg ", " reg/mem))
547 (rex :field (byte 4 4) :value #b0100)
548 (op :field (byte 8 8))
549 (reg/mem :fields (list (byte 2 22) (byte 3 16) (byte 4 0))
551 (reg :field (byte 3 19) :type 'reg)
555 ;;; same as reg-reg/mem, but with direction bit
556 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
557 :include 'reg-reg/mem
561 ,(swap-if 'dir 'reg/mem ", " 'reg)))
562 (op :field (byte 6 2))
563 (dir :field (byte 1 1)))
565 (sb!disassem:define-instruction-format (rex-reg-reg/mem-dir 24
566 :include 'rex-reg-reg/mem
570 ,(swap-if 'dir 'reg/mem ", " 'reg)))
571 (rex :field (byte 4 4) :value #b0100)
572 (op :field (byte 6 10))
573 (dir :field (byte 1 9)))
575 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
576 (sb!disassem:define-instruction-format (reg/mem 16
577 :default-printer '(:name :tab reg/mem))
578 (op :fields (list (byte 7 1) (byte 3 11)))
579 (width :field (byte 1 0) :type 'width)
580 (reg/mem :fields (list (byte 2 14) (byte 3 8))
581 :type 'sized-reg/mem)
585 (sb!disassem:define-instruction-format (rex-reg/mem 24
586 :default-printer '(:name :tab reg/mem))
587 (rex :field (byte 4 4) :value #b0100)
588 (op :fields (list (byte 8 8) (byte 3 19)))
589 (reg/mem :fields (list (byte 2 22) (byte 3 16) (byte 4 0)) :type 'sized-rex-reg/mem)
593 ;;; Same as reg/mem, but with the immediate value occurring by default,
594 ;;; and with an appropiate printer.
595 (sb!disassem:define-instruction-format (reg/mem-imm 16
598 '(:name :tab reg/mem ", " imm))
599 (reg/mem :type 'sized-reg/mem)
600 (imm :type 'imm-data))
602 (sb!disassem:define-instruction-format (rex-reg/mem-imm 24
603 :include 'rex-reg/mem
605 '(:name :tab reg/mem ", " imm))
606 (reg/mem :type 'sized-rex-reg/mem)
607 (imm :type 'imm-data))
609 ;;; Same as reg/mem, but with using the accumulator in the default printer
610 (sb!disassem:define-instruction-format
612 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
613 (reg/mem :type 'reg/mem) ; don't need a size
614 (accum :type 'accum))
616 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
617 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
619 `(:name :tab reg ", " reg/mem))
620 (prefix :field (byte 8 0) :value #b00001111)
621 (op :field (byte 7 9))
622 (width :field (byte 1 8) :type 'width)
623 (reg/mem :fields (list (byte 2 22) (byte 3 16))
625 (reg :field (byte 3 19) :type 'reg)
629 ;;; Same as reg-reg/mem, but with a prefix of #xf2 0f
630 (sb!disassem:define-instruction-format (xmm-ext-reg-reg/mem 32
632 `(:name :tab reg ", " reg/mem))
633 (prefix :field (byte 8 0) :value #xf2)
634 (prefix2 :field (byte 8 8) :value #x0f)
635 (op :field (byte 7 17))
636 (width :field (byte 1 16) :type 'width)
637 (reg/mem :fields (list (byte 2 30) (byte 3 24))
639 (reg :field (byte 3 27) :type 'reg)
643 ;;; reg-no-width with #x0f prefix
644 (sb!disassem:define-instruction-format (ext-reg-no-width 16
645 :default-printer '(:name :tab reg))
646 (prefix :field (byte 8 0) :value #b00001111)
647 (op :field (byte 5 11))
648 (reg :field (byte 3 8) :type 'word-reg))
650 ;;; Same as reg/mem, but with a prefix of #b00001111
651 (sb!disassem:define-instruction-format (ext-reg/mem 24
652 :default-printer '(:name :tab reg/mem))
653 (prefix :field (byte 8 0) :value #b00001111)
654 (op :fields (list (byte 7 9) (byte 3 19)))
655 (width :field (byte 1 8) :type 'width)
656 (reg/mem :fields (list (byte 2 22) (byte 3 16))
657 :type 'sized-reg/mem)
661 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
662 :include 'ext-reg/mem
664 '(:name :tab reg/mem ", " imm))
665 (imm :type 'imm-data))
667 ;;;; This section was added by jrd, for fp instructions.
669 ;;; regular fp inst to/from registers/memory
670 (sb!disassem:define-instruction-format (floating-point 16
672 `(:name :tab reg/mem))
673 (prefix :field (byte 5 3) :value #b11011)
674 (op :fields (list (byte 3 0) (byte 3 11)))
675 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
677 ;;; fp insn to/from fp reg
678 (sb!disassem:define-instruction-format (floating-point-fp 16
679 :default-printer `(:name :tab fp-reg))
680 (prefix :field (byte 5 3) :value #b11011)
681 (suffix :field (byte 2 14) :value #b11)
682 (op :fields (list (byte 3 0) (byte 3 11)))
683 (fp-reg :field (byte 3 8) :type 'fp-reg))
685 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
686 (sb!disassem:define-instruction-format
687 (floating-point-fp-d 16
688 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
689 (prefix :field (byte 5 3) :value #b11011)
690 (suffix :field (byte 2 14) :value #b11)
691 (op :fields (list (byte 2 0) (byte 3 11)))
692 (d :field (byte 1 2))
693 (fp-reg :field (byte 3 8) :type 'fp-reg))
696 ;;; (added by (?) pfw)
697 ;;; fp no operand isns
698 (sb!disassem:define-instruction-format (floating-point-no 16
699 :default-printer '(:name))
700 (prefix :field (byte 8 0) :value #b11011001)
701 (suffix :field (byte 3 13) :value #b111)
702 (op :field (byte 5 8)))
704 (sb!disassem:define-instruction-format (floating-point-3 16
705 :default-printer '(:name))
706 (prefix :field (byte 5 3) :value #b11011)
707 (suffix :field (byte 2 14) :value #b11)
708 (op :fields (list (byte 3 0) (byte 6 8))))
710 (sb!disassem:define-instruction-format (floating-point-5 16
711 :default-printer '(:name))
712 (prefix :field (byte 8 0) :value #b11011011)
713 (suffix :field (byte 3 13) :value #b111)
714 (op :field (byte 5 8)))
716 (sb!disassem:define-instruction-format (floating-point-st 16
717 :default-printer '(:name))
718 (prefix :field (byte 8 0) :value #b11011111)
719 (suffix :field (byte 3 13) :value #b111)
720 (op :field (byte 5 8)))
722 (sb!disassem:define-instruction-format (string-op 8
724 :default-printer '(:name width)))
726 (sb!disassem:define-instruction-format (rex-string-op 16
728 :default-printer '(:name width)))
730 (sb!disassem:define-instruction-format (short-cond-jump 16)
731 (op :field (byte 4 4))
732 (cc :field (byte 4 0) :type 'condition-code)
733 (label :field (byte 8 8) :type 'displacement))
735 (sb!disassem:define-instruction-format (short-jump 16
736 :default-printer '(:name :tab label))
737 (const :field (byte 4 4) :value #b1110)
738 (op :field (byte 4 0))
739 (label :field (byte 8 8) :type 'displacement))
741 (sb!disassem:define-instruction-format (near-cond-jump 16)
742 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
743 (cc :field (byte 4 8) :type 'condition-code)
744 ;; The disassembler currently doesn't let you have an instruction > 32 bits
745 ;; long, so we fake it by using a prefilter to read the offset.
746 (label :type 'displacement
747 :prefilter (lambda (value dstate)
748 (declare (ignore value)) ; always nil anyway
749 (sb!disassem:read-signed-suffix 32 dstate))))
751 (sb!disassem:define-instruction-format (near-jump 8
752 :default-printer '(:name :tab label))
753 (op :field (byte 8 0))
754 ;; The disassembler currently doesn't let you have an instruction > 32 bits
755 ;; long, so we fake it by using a prefilter to read the address.
756 (label :type 'displacement
757 :prefilter (lambda (value dstate)
758 (declare (ignore value)) ; always nil anyway
759 (sb!disassem:read-signed-suffix 32 dstate))))
762 (sb!disassem:define-instruction-format (cond-set 24
763 :default-printer '('set cc :tab reg/mem))
764 (prefix :field (byte 8 0) :value #b00001111)
765 (op :field (byte 4 12) :value #b1001)
766 (cc :field (byte 4 8) :type 'condition-code)
767 (reg/mem :fields (list (byte 2 22) (byte 3 16))
769 (reg :field (byte 3 19) :value #b000))
771 (sb!disassem:define-instruction-format (cond-move 24
773 '('cmov cc :tab reg ", " reg/mem))
774 (prefix :field (byte 8 0) :value #b00001111)
775 (op :field (byte 4 12) :value #b0100)
776 (cc :field (byte 4 8) :type 'condition-code)
777 (reg/mem :fields (list (byte 2 22) (byte 3 16))
779 (reg :field (byte 3 19) :type 'reg))
781 (sb!disassem:define-instruction-format (enter-format 32
782 :default-printer '(:name
784 (:unless (:constant 0)
786 (op :field (byte 8 0))
787 (disp :field (byte 16 8))
788 (level :field (byte 8 24)))
790 ;;; Single byte instruction with an immediate byte argument.
791 (sb!disassem:define-instruction-format (byte-imm 16
792 :default-printer '(:name :tab code))
793 (op :field (byte 8 0))
794 (code :field (byte 8 8)))
796 ;;;; primitive emitters
798 (define-bitfield-emitter emit-word 16
801 (define-bitfield-emitter emit-dword 32
804 (define-bitfield-emitter emit-qword 64
807 (define-bitfield-emitter emit-byte-with-reg 8
808 (byte 5 3) (byte 3 0))
810 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
811 (byte 2 6) (byte 3 3) (byte 3 0))
813 (define-bitfield-emitter emit-sib-byte 8
814 (byte 2 6) (byte 3 3) (byte 3 0))
816 (define-bitfield-emitter emit-rex-byte 8
817 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
823 (defun emit-absolute-fixup (segment fixup &optional quad-p)
824 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
825 (let ((offset (fixup-offset fixup)))
827 (emit-back-patch segment
829 (lambda (segment posn)
830 (declare (ignore posn))
831 (let ((val (- (+ (component-header-length)
832 (or (label-position offset)
834 other-pointer-lowtag)))
836 (emit-qword segment val )
837 (emit-dword segment val )))))
839 (emit-qword segment (or offset 0))
840 (emit-dword segment (or offset 0))))))
842 (defun emit-relative-fixup (segment fixup)
843 (note-fixup segment :relative fixup)
844 (emit-dword segment (or (fixup-offset fixup) 0)))
847 ;;;; the effective-address (ea) structure
849 (defun reg-tn-encoding (tn)
850 (declare (type tn tn))
851 (aver (member (sb-name (sc-sb (tn-sc tn))) '(registers float-registers)))
852 ;; ea only has space for three bits of register number: regs r8
853 ;; and up are selected by a REX prefix byte which caller is responsible
854 ;; for having emitted where necessary already
855 (cond ((fp-reg-tn-p tn)
856 (mod (tn-offset tn) 8))
858 (let ((offset (mod (tn-offset tn) 16)))
859 (logior (ash (logand offset 1) 2)
862 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
864 ;; note that we can represent an EA qith a QWORD size, but EMIT-EA
865 ;; can't actually emit it on its own: caller also needs to emit REX
867 (size nil :type (member :byte :word :dword :qword))
868 (base nil :type (or tn null))
869 (index nil :type (or tn null))
870 (scale 1 :type (member 1 2 4 8))
871 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
872 (def!method print-object ((ea ea) stream)
873 (cond ((or *print-escape* *print-readably*)
874 (print-unreadable-object (ea stream :type t)
876 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
880 (let ((scale (ea-scale ea)))
881 (if (= scale 1) nil scale))
884 (format stream "~A PTR [" (symbol-name (ea-size ea)))
886 (write-string (sb!c::location-print-name (ea-base ea)) stream)
888 (write-string "+" stream)))
890 (write-string (sb!c::location-print-name (ea-index ea)) stream))
891 (unless (= (ea-scale ea) 1)
892 (format stream "*~A" (ea-scale ea)))
893 (typecase (ea-disp ea)
896 (format stream "~@D" (ea-disp ea)))
898 (format stream "+~A" (ea-disp ea))))
899 (write-char #\] stream))))
901 (defun emit-constant-tn-rip (segment constant-tn reg)
902 ;; AMD64 doesn't currently have a code object register to use as a
903 ;; base register for constant access. Instead we use RIP-relative
904 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
905 ;; is passed to the backpatch callback. In addition we need the offset
906 ;; from the start of the function header to the slot in the CODE-HEADER
907 ;; that stores the constant. Since we don't know where the code header
908 ;; starts, instead count backwards from the function header.
909 (let* ((2comp (component-info *component-being-compiled*))
910 (constants (ir2-component-constants 2comp))
911 (len (length constants))
912 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
913 ;; If there are an even amount of constants, there will be
914 ;; an extra qword of padding before the function header, which
915 ;; needs to be adjusted for. XXX: This will break if new slots
916 ;; are added to the code header.
917 (offset (* (- (+ len (if (evenp len)
920 (tn-offset constant-tn))
922 ;; RIP-relative addressing
923 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
924 (emit-back-patch segment
926 (lambda (segment posn)
927 ;; The addressing is relative to end of instruction,
928 ;; i.e. the end of this dword. Hence the + 4.
929 (emit-dword segment (+ 4 (- (+ offset posn)))))))
932 (defun emit-label-rip (segment fixup reg)
933 (let ((label (fixup-offset fixup)))
934 ;; RIP-relative addressing
935 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
936 (emit-back-patch segment
938 (lambda (segment posn)
939 (emit-dword segment (- (label-position label)
943 (defun emit-ea (segment thing reg &optional allow-constants)
946 ;; this would be eleganter if we had a function that would create
948 (ecase (sb-name (sc-sb (tn-sc thing)))
949 ((registers float-registers)
950 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
952 ;; Convert stack tns into an index off RBP.
953 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
954 (cond ((< -128 disp 127)
955 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
956 (emit-byte segment disp))
958 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
959 (emit-dword segment disp)))))
961 (unless allow-constants
964 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
965 (emit-constant-tn-rip segment thing reg))))
967 (let* ((base (ea-base thing))
968 (index (ea-index thing))
969 (scale (ea-scale thing))
970 (disp (ea-disp thing))
971 (mod (cond ((or (null base)
973 (not (= (reg-tn-encoding base) #b101))))
975 ((and (fixnump disp) (<= -128 disp 127))
979 (r/m (cond (index #b100)
981 (t (reg-tn-encoding base)))))
982 (when (and (= mod 0) (= r/m #b101))
983 ;; this is rip-relative in amd64, so we'll use a sib instead
984 (setf r/m #b100 scale 1))
985 (emit-mod-reg-r/m-byte segment mod reg r/m)
987 (let ((ss (1- (integer-length scale)))
988 (index (if (null index)
990 (let ((index (reg-tn-encoding index)))
992 (error "can't index off of ESP")
994 (base (if (null base)
996 (reg-tn-encoding base))))
997 (emit-sib-byte segment ss index base)))
999 (emit-byte segment disp))
1000 ((or (= mod #b10) (null base))
1002 (emit-absolute-fixup segment disp)
1003 (emit-dword segment disp))))))
1005 (typecase (fixup-offset thing)
1007 (emit-label-rip segment thing reg))
1009 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1010 (emit-sib-byte segment 0 #b100 #b101)
1011 (emit-absolute-fixup segment thing))))))
1013 (defun fp-reg-tn-p (thing)
1015 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1017 ;;; like the above, but for fp-instructions--jrd
1018 (defun emit-fp-op (segment thing op)
1019 (if (fp-reg-tn-p thing)
1020 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
1023 (emit-ea segment thing op)))
1025 (defun byte-reg-p (thing)
1027 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1028 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1031 (defun byte-ea-p (thing)
1033 (ea (eq (ea-size thing) :byte))
1035 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1038 (defun word-reg-p (thing)
1040 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1041 (member (sc-name (tn-sc thing)) *word-sc-names*)
1044 (defun word-ea-p (thing)
1046 (ea (eq (ea-size thing) :word))
1047 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1050 (defun dword-reg-p (thing)
1052 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1053 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1056 (defun dword-ea-p (thing)
1058 (ea (eq (ea-size thing) :dword))
1060 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1063 (defun qword-reg-p (thing)
1065 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1066 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1069 (defun qword-ea-p (thing)
1071 (ea (eq (ea-size thing) :qword))
1073 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1076 (defun register-p (thing)
1078 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1080 (defun accumulator-p (thing)
1081 (and (register-p thing)
1082 (= (tn-offset thing) 0)))
1087 (def!constant +operand-size-prefix-byte+ #b01100110)
1089 (defun maybe-emit-operand-size-prefix (segment size)
1090 (unless (or (eq size :byte)
1091 (eq size :qword) ; REX prefix handles this
1092 (eq size +default-operand-size+))
1093 (emit-byte segment +operand-size-prefix-byte+)))
1095 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1097 (if (and r (> (tn-offset r)
1098 ;; offset of r8 is 16, offset of xmm8 is 8
1104 (let ((rex-w (if (eq operand-size :qword) 1 0))
1108 (when (or (eq operand-size :byte) ;; REX needed to access SIL/DIL
1109 (not (zerop (logior rex-w rex-r rex-x rex-b))))
1110 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1112 (defun maybe-emit-rex-for-ea (segment ea reg &key operand-size)
1113 (let ((ea-p (ea-p ea))) ;emit-ea can also be called with a tn
1114 (maybe-emit-rex-prefix segment
1115 (or operand-size (operand-size ea))
1117 (and ea-p (ea-index ea))
1118 (cond (ea-p (ea-base ea))
1120 (member (sb-name (sc-sb (tn-sc ea)))
1121 '(float-registers registers)))
1125 (defun operand-size (thing)
1128 ;; FIXME: might as well be COND instead of having to use #. readmacro
1129 ;; to hack up the code
1130 (case (sc-name (tn-sc thing))
1139 ;; added by jrd: float-registers is a separate size (?)
1142 (#.*double-sc-names*
1145 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1149 ;; GNA. Guess who spelt "flavor" correctly first time round?
1150 ;; There's a strong argument in my mind to change all uses of
1151 ;; "flavor" to "kind": and similarly with some misguided uses of
1152 ;; "type" here and there. -- CSR, 2005-01-06.
1153 (case (fixup-flavor thing)
1154 ((:foreign-dataref) :qword)))
1158 (defun matching-operand-size (dst src)
1159 (let ((dst-size (operand-size dst))
1160 (src-size (operand-size src)))
1163 (if (eq dst-size src-size)
1165 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1166 dst dst-size src src-size))
1170 (error "can't tell the size of either ~S or ~S" dst src)))))
1172 (defun emit-sized-immediate (segment size value &optional quad-p)
1175 (emit-byte segment value))
1177 (emit-word segment value))
1179 ;; except in a very few cases (MOV instructions A1,A3,B8) we expect
1180 ;; dword data bytes even when 64 bit work is being done. So, mostly
1181 ;; we treat quad constants as dwords.
1182 (if (and quad-p (eq size :qword))
1183 (emit-qword segment value)
1184 (emit-dword segment value)))))
1186 ;;;; general data transfer
1188 (define-instruction mov (segment dst src)
1189 ;; immediate to register
1190 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
1191 '(:name :tab reg ", " imm))
1192 (:printer rex-reg ((op #b10111) (imm nil :type 'imm-data))
1193 '(:name :tab reg ", " imm))
1194 ;; absolute mem to/from accumulator
1195 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1196 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1197 ;; register to/from register/memory
1198 (:printer reg-reg/mem-dir ((op #b100010)))
1199 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1200 ;; immediate to register/memory
1201 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1202 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1205 (let ((size (matching-operand-size dst src)))
1206 (maybe-emit-operand-size-prefix segment size)
1207 (cond ((register-p dst)
1208 (cond ((integerp src)
1209 (maybe-emit-rex-prefix segment size nil nil dst)
1210 (emit-byte-with-reg segment
1214 (reg-tn-encoding dst))
1215 (emit-sized-immediate segment size src (eq size :qword)))
1217 (maybe-emit-rex-for-ea segment src dst)
1222 (emit-ea segment src (reg-tn-encoding dst) t))))
1224 ;; C7 only deals with 32 bit immediates even if register is
1225 ;; 64 bit: only b8-bf use 64 bit immediates
1226 (maybe-emit-rex-for-ea segment dst nil)
1227 (cond ((typep src '(or (signed-byte 32) (unsigned-byte 32)))
1229 (if (eq size :byte) #b11000110 #b11000111))
1230 (emit-ea segment dst #b000)
1231 (emit-sized-immediate segment
1232 (case size (:qword :dword) (t size))
1237 (maybe-emit-rex-for-ea segment dst src)
1238 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1239 (emit-ea segment dst (reg-tn-encoding src)))
1241 ;; Generally we can't MOV a fixupped value into an EA, since
1242 ;; MOV on non-registers can only take a 32-bit immediate arg.
1243 ;; Make an exception for :FOREIGN fixups (pretty much just
1244 ;; the runtime asm, since other foreign calls go through the
1245 ;; the linkage table) and for linkage table references, since
1246 ;; these should always end up in low memory.
1247 (aver (or (eq (fixup-flavor src) :foreign)
1248 (eq (fixup-flavor src) :foreign-dataref)
1249 (eq (ea-size dst) :dword)))
1250 (maybe-emit-rex-for-ea segment dst nil)
1251 (emit-byte segment #b11000111)
1252 (emit-ea segment dst #b000)
1253 (emit-absolute-fixup segment src))
1255 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1257 (defun emit-move-with-extension (segment dst src signed-p)
1258 (aver (register-p dst))
1259 (let ((dst-size (operand-size dst))
1260 (src-size (operand-size src))
1261 (opcode (if signed-p #b10111110 #b10110110)))
1264 (aver (eq src-size :byte))
1265 (maybe-emit-operand-size-prefix segment :word)
1266 (emit-byte segment #b00001111)
1267 (emit-byte segment opcode)
1268 (emit-ea segment src (reg-tn-encoding dst)))
1272 (maybe-emit-operand-size-prefix segment :dword)
1273 (maybe-emit-rex-for-ea segment src dst
1274 :operand-size (operand-size dst))
1275 (emit-byte segment #b00001111)
1276 (emit-byte segment opcode)
1277 (emit-ea segment src (reg-tn-encoding dst)))
1279 (maybe-emit-rex-for-ea segment src dst
1280 :operand-size (operand-size dst))
1281 (emit-byte segment #b00001111)
1282 (emit-byte segment (logior opcode 1))
1283 (emit-ea segment src (reg-tn-encoding dst)))
1285 (aver (eq dst-size :qword))
1286 ;; dst is in reg, src is in modrm
1287 (let ((ea-p (ea-p src)))
1288 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1289 (and ea-p (ea-index src))
1290 (cond (ea-p (ea-base src))
1293 (emit-byte segment #x63) ;movsxd
1294 ;;(emit-byte segment opcode)
1295 (emit-ea segment src (reg-tn-encoding dst)))))))))
1297 (define-instruction movsx (segment dst src)
1298 (:printer ext-reg-reg/mem ((op #b1011111) (reg nil :type 'word-reg)))
1299 (:emitter (emit-move-with-extension segment dst src :signed)))
1301 (define-instruction movzx (segment dst src)
1302 (:printer ext-reg-reg/mem ((op #b1011011) (reg nil :type 'word-reg)))
1303 (:emitter (emit-move-with-extension segment dst src nil)))
1305 (define-instruction movsxd (segment dst src)
1306 (:printer reg-reg/mem ((op #x63) (reg nil :type 'word-reg)))
1307 (:emitter (emit-move-with-extension segment dst src :signed)))
1309 ;;; this is not a real amd64 instruction, of course
1310 (define-instruction movzxd (segment dst src)
1311 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'word-reg)))
1312 (:emitter (emit-move-with-extension segment dst src nil)))
1314 (define-instruction push (segment src)
1316 (:printer reg-no-width ((op #b01010)))
1317 (:printer rex-reg-no-width ((op #b01010)))
1319 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
1320 (:printer rex-reg/mem ((op '(#b11111111 #b110))))
1322 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1324 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
1326 ;; ### segment registers?
1329 (cond ((integerp src)
1330 (cond ((<= -128 src 127)
1331 (emit-byte segment #b01101010)
1332 (emit-byte segment src))
1334 ;; AMD64 manual says no REX needed but is unclear
1335 ;; whether it expects 32 or 64 bit immediate here
1336 (emit-byte segment #b01101000)
1337 (emit-dword segment src))))
1339 (let ((size (operand-size src)))
1340 (aver (not (eq size :byte)))
1341 (maybe-emit-operand-size-prefix segment size)
1342 (maybe-emit-rex-for-ea segment src nil)
1343 (cond ((register-p src)
1344 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1346 (emit-byte segment #b11111111)
1347 (emit-ea segment src #b110 t))))))))
1349 (define-instruction pusha (segment)
1350 (:printer byte ((op #b01100000)))
1352 (emit-byte segment #b01100000)))
1354 (define-instruction pop (segment dst)
1355 (:printer reg-no-width ((op #b01011)))
1356 (:printer rex-reg-no-width ((op #b01011)))
1357 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
1358 (:printer rex-reg/mem ((op '(#b10001111 #b000))))
1360 (let ((size (operand-size dst)))
1361 (aver (not (eq size :byte)))
1362 (maybe-emit-operand-size-prefix segment size)
1363 (maybe-emit-rex-for-ea segment dst nil)
1364 (cond ((register-p dst)
1365 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1367 (emit-byte segment #b10001111)
1368 (emit-ea segment dst #b000))))))
1370 (define-instruction popa (segment)
1371 (:printer byte ((op #b01100001)))
1373 (emit-byte segment #b01100001)))
1375 (define-instruction xchg (segment operand1 operand2)
1376 ;; Register with accumulator.
1377 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1378 ;; Register/Memory with Register.
1379 (:printer reg-reg/mem ((op #b1000011)))
1381 (let ((size (matching-operand-size operand1 operand2)))
1382 (maybe-emit-operand-size-prefix segment size)
1383 (labels ((xchg-acc-with-something (acc something)
1384 (if (and (not (eq size :byte)) (register-p something))
1386 (maybe-emit-rex-for-ea segment acc something)
1387 (emit-byte-with-reg segment
1389 (reg-tn-encoding something)))
1390 (xchg-reg-with-something acc something)))
1391 (xchg-reg-with-something (reg something)
1392 (maybe-emit-rex-for-ea segment something reg)
1393 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1394 (emit-ea segment something (reg-tn-encoding reg))))
1395 (cond ((accumulator-p operand1)
1396 (xchg-acc-with-something operand1 operand2))
1397 ((accumulator-p operand2)
1398 (xchg-acc-with-something operand2 operand1))
1399 ((register-p operand1)
1400 (xchg-reg-with-something operand1 operand2))
1401 ((register-p operand2)
1402 (xchg-reg-with-something operand2 operand1))
1404 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1406 (define-instruction lea (segment dst src)
1407 (:printer rex-reg-reg/mem ((op #b10001101)))
1408 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1410 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1411 (maybe-emit-rex-for-ea segment src dst
1412 :operand-size :qword)
1413 (emit-byte segment #b10001101)
1414 (emit-ea segment src (reg-tn-encoding dst))))
1416 (define-instruction cmpxchg (segment dst src)
1417 ;; Register/Memory with Register.
1418 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1420 (aver (register-p src))
1421 (let ((size (matching-operand-size src dst)))
1422 (maybe-emit-operand-size-prefix segment size)
1423 (maybe-emit-rex-for-ea segment dst src)
1424 (emit-byte segment #b00001111)
1425 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1426 (emit-ea segment dst (reg-tn-encoding src)))))
1430 (define-instruction fs-segment-prefix (segment)
1432 (emit-byte segment #x64)))
1434 ;;;; flag control instructions
1436 ;;; CLC -- Clear Carry Flag.
1437 (define-instruction clc (segment)
1438 (:printer byte ((op #b11111000)))
1440 (emit-byte segment #b11111000)))
1442 ;;; CLD -- Clear Direction Flag.
1443 (define-instruction cld (segment)
1444 (:printer byte ((op #b11111100)))
1446 (emit-byte segment #b11111100)))
1448 ;;; CLI -- Clear Iterrupt Enable Flag.
1449 (define-instruction cli (segment)
1450 (:printer byte ((op #b11111010)))
1452 (emit-byte segment #b11111010)))
1454 ;;; CMC -- Complement Carry Flag.
1455 (define-instruction cmc (segment)
1456 (:printer byte ((op #b11110101)))
1458 (emit-byte segment #b11110101)))
1460 ;;; LAHF -- Load AH into flags.
1461 (define-instruction lahf (segment)
1462 (:printer byte ((op #b10011111)))
1464 (emit-byte segment #b10011111)))
1466 ;;; POPF -- Pop flags.
1467 (define-instruction popf (segment)
1468 (:printer byte ((op #b10011101)))
1470 (emit-byte segment #b10011101)))
1472 ;;; PUSHF -- push flags.
1473 (define-instruction pushf (segment)
1474 (:printer byte ((op #b10011100)))
1476 (emit-byte segment #b10011100)))
1478 ;;; SAHF -- Store AH into flags.
1479 (define-instruction sahf (segment)
1480 (:printer byte ((op #b10011110)))
1482 (emit-byte segment #b10011110)))
1484 ;;; STC -- Set Carry Flag.
1485 (define-instruction stc (segment)
1486 (:printer byte ((op #b11111001)))
1488 (emit-byte segment #b11111001)))
1490 ;;; STD -- Set Direction Flag.
1491 (define-instruction std (segment)
1492 (:printer byte ((op #b11111101)))
1494 (emit-byte segment #b11111101)))
1496 ;;; STI -- Set Interrupt Enable Flag.
1497 (define-instruction sti (segment)
1498 (:printer byte ((op #b11111011)))
1500 (emit-byte segment #b11111011)))
1504 (defun emit-random-arith-inst (name segment dst src opcode
1505 &optional allow-constants)
1506 (let ((size (matching-operand-size dst src)))
1507 (maybe-emit-operand-size-prefix segment size)
1510 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1511 (maybe-emit-rex-for-ea segment dst nil)
1512 (emit-byte segment #b10000011)
1513 (emit-ea segment dst opcode allow-constants)
1514 (emit-byte segment src))
1515 ((accumulator-p dst)
1516 (maybe-emit-rex-for-ea segment dst nil)
1523 (emit-sized-immediate segment size src))
1525 (maybe-emit-rex-for-ea segment dst nil)
1526 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1527 (emit-ea segment dst opcode allow-constants)
1528 (emit-sized-immediate segment size src))))
1530 (maybe-emit-rex-for-ea segment dst src)
1534 (if (eq size :byte) #b00000000 #b00000001)))
1535 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1537 (maybe-emit-rex-for-ea segment src dst)
1541 (if (eq size :byte) #b00000010 #b00000011)))
1542 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1544 (error "bogus operands to ~A" name)))))
1546 (eval-when (:compile-toplevel :execute)
1547 (defun arith-inst-printer-list (subop)
1548 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1549 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1550 (reg/mem-imm ((op (#b1000000 ,subop))))
1551 (rex-reg/mem-imm ((op (#b10000001 ,subop))))
1552 (reg/mem-imm ((op (#b1000001 ,subop))
1553 (imm nil :type signed-imm-byte)))
1554 (rex-reg/mem-imm ((op (#b10000011 ,subop))
1555 (imm nil :type signed-imm-byte)))
1556 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
1557 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1560 (define-instruction add (segment dst src)
1561 (:printer-list (arith-inst-printer-list #b000))
1562 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1564 (define-instruction adc (segment dst src)
1565 (:printer-list (arith-inst-printer-list #b010))
1566 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1568 (define-instruction sub (segment dst src)
1569 (:printer-list (arith-inst-printer-list #b101))
1570 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1572 (define-instruction sbb (segment dst src)
1573 (:printer-list (arith-inst-printer-list #b011))
1574 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1576 (define-instruction cmp (segment dst src)
1577 (:printer-list (arith-inst-printer-list #b111))
1578 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1580 (define-instruction inc (segment dst)
1582 (:printer modrm-reg-no-width ((modrm-reg #b000)))
1584 ;; (:printer rex-reg/mem ((op '(#b11111111 #b001))))
1585 (:printer reg/mem ((op '(#b1111111 #b000))))
1587 (let ((size (operand-size dst)))
1588 (maybe-emit-operand-size-prefix segment size)
1589 (cond #+nil ; these opcodes become REX prefixes in x86-64
1590 ((and (not (eq size :byte)) (register-p dst))
1591 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1593 (maybe-emit-rex-for-ea segment dst nil)
1594 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1595 (emit-ea segment dst #b000))))))
1597 (define-instruction dec (segment dst)
1599 (:printer modrm-reg-no-width ((modrm-reg #b001)))
1601 (:printer reg/mem ((op '(#b1111111 #b001))))
1603 (let ((size (operand-size dst)))
1604 (maybe-emit-operand-size-prefix segment size)
1606 ((and (not (eq size :byte)) (register-p dst))
1607 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1609 (maybe-emit-rex-for-ea segment dst nil)
1610 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1611 (emit-ea segment dst #b001))))))
1613 (define-instruction neg (segment dst)
1614 (:printer reg/mem ((op '(#b1111011 #b011))))
1616 (let ((size (operand-size dst)))
1617 (maybe-emit-operand-size-prefix segment size)
1618 (maybe-emit-rex-for-ea segment dst nil)
1619 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1620 (emit-ea segment dst #b011))))
1622 (define-instruction mul (segment dst src)
1623 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1625 (let ((size (matching-operand-size dst src)))
1626 (aver (accumulator-p dst))
1627 (maybe-emit-operand-size-prefix segment size)
1628 (maybe-emit-rex-for-ea segment src nil)
1629 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1630 (emit-ea segment src #b100))))
1632 (define-instruction imul (segment dst &optional src1 src2)
1633 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1634 (:printer ext-reg-reg/mem ((op #b1010111)))
1635 (:printer reg-reg/mem ((op #b0110100) (width 1) (imm nil :type 'imm-word))
1636 '(:name :tab reg ", " reg/mem ", " imm))
1637 (:printer reg-reg/mem ((op #b0110101) (width 1)
1638 (imm nil :type 'signed-imm-byte))
1639 '(:name :tab reg ", " reg/mem ", " imm))
1641 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1642 (let* ((size (matching-operand-size reg r/m))
1643 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1644 (maybe-emit-operand-size-prefix segment size)
1645 (maybe-emit-rex-for-ea segment r/m reg)
1646 (emit-byte segment (if sx #b01101011 #b01101001))
1647 (emit-ea segment r/m (reg-tn-encoding reg))
1649 (emit-byte segment immed)
1650 (emit-sized-immediate segment size immed)))))
1652 (r/m-with-immed-to-reg dst src1 src2))
1655 (r/m-with-immed-to-reg dst dst src1)
1656 (let ((size (matching-operand-size dst src1)))
1657 (maybe-emit-operand-size-prefix segment size)
1658 (maybe-emit-rex-for-ea segment src1 dst)
1659 (emit-byte segment #b00001111)
1660 (emit-byte segment #b10101111)
1661 (emit-ea segment src1 (reg-tn-encoding dst)))))
1663 (let ((size (operand-size dst)))
1664 (maybe-emit-operand-size-prefix segment size)
1665 (maybe-emit-rex-for-ea segment dst nil)
1666 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1667 (emit-ea segment dst #b101)))))))
1669 (define-instruction div (segment dst src)
1670 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1672 (let ((size (matching-operand-size dst src)))
1673 (aver (accumulator-p dst))
1674 (maybe-emit-operand-size-prefix segment size)
1675 (maybe-emit-rex-for-ea segment src nil)
1676 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1677 (emit-ea segment src #b110))))
1679 (define-instruction idiv (segment dst src)
1680 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1682 (let ((size (matching-operand-size dst src)))
1683 (aver (accumulator-p dst))
1684 (maybe-emit-operand-size-prefix segment size)
1685 (maybe-emit-rex-for-ea segment src nil)
1686 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1687 (emit-ea segment src #b111))))
1689 (define-instruction bswap (segment dst)
1690 (:printer ext-reg-no-width ((op #b11001)))
1692 (let ((size (operand-size dst)))
1693 (maybe-emit-rex-prefix segment size nil nil dst)
1694 (emit-byte segment #x0f)
1695 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
1697 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1698 (define-instruction cbw (segment)
1700 (maybe-emit-operand-size-prefix segment :word)
1701 (emit-byte segment #b10011000)))
1703 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1704 (define-instruction cwde (segment)
1706 (maybe-emit-operand-size-prefix segment :dword)
1707 (emit-byte segment #b10011000)))
1709 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1710 (define-instruction cwd (segment)
1712 (maybe-emit-operand-size-prefix segment :word)
1713 (emit-byte segment #b10011001)))
1715 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1716 (define-instruction cdq (segment)
1717 (:printer byte ((op #b10011001)))
1719 (maybe-emit-operand-size-prefix segment :dword)
1720 (emit-byte segment #b10011001)))
1722 ;;; CQO -- Convert Quad or Octaword. RDX:RAX <- sign_xtnd(RAX)
1723 (define-instruction cqo (segment)
1725 (maybe-emit-rex-prefix segment :qword nil nil nil)
1726 (emit-byte segment #b10011001)))
1728 (define-instruction xadd (segment dst src)
1729 ;; Register/Memory with Register.
1730 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1732 (aver (register-p src))
1733 (let ((size (matching-operand-size src dst)))
1734 (maybe-emit-operand-size-prefix segment size)
1735 (maybe-emit-rex-for-ea segment dst src)
1736 (emit-byte segment #b00001111)
1737 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1738 (emit-ea segment dst (reg-tn-encoding src)))))
1743 (defun emit-shift-inst (segment dst amount opcode)
1744 (let ((size (operand-size dst)))
1745 (maybe-emit-operand-size-prefix segment size)
1746 (multiple-value-bind (major-opcode immed)
1748 (:cl (values #b11010010 nil))
1749 (1 (values #b11010000 nil))
1750 (t (values #b11000000 t)))
1751 (maybe-emit-rex-for-ea segment dst nil)
1753 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1754 (emit-ea segment dst opcode)
1756 (emit-byte segment amount)))))
1758 (eval-when (:compile-toplevel :execute)
1759 (defun shift-inst-printer-list (subop)
1760 `((reg/mem ((op (#b1101000 ,subop)))
1761 (:name :tab reg/mem ", 1"))
1762 (rex-reg/mem ((op (#b1101000 ,subop)))
1763 (:name :tab reg/mem ", 1"))
1764 (reg/mem ((op (#b1101001 ,subop)))
1765 (:name :tab reg/mem ", " 'cl))
1766 (rex-reg/mem ((op (#b1101001 ,subop)))
1767 (:name :tab reg/mem ", " 'cl))
1768 (reg/mem-imm ((op (#b1100000 ,subop))
1769 (imm nil :type signed-imm-byte)))
1770 (rex-reg/mem-imm ((op (#b11000001 ,subop))
1771 (imm nil :type signed-imm-byte))))))
1773 (define-instruction rol (segment dst amount)
1775 (shift-inst-printer-list #b000))
1777 (emit-shift-inst segment dst amount #b000)))
1779 (define-instruction ror (segment dst amount)
1781 (shift-inst-printer-list #b001))
1783 (emit-shift-inst segment dst amount #b001)))
1785 (define-instruction rcl (segment dst amount)
1787 (shift-inst-printer-list #b010))
1789 (emit-shift-inst segment dst amount #b010)))
1791 (define-instruction rcr (segment dst amount)
1793 (shift-inst-printer-list #b011))
1795 (emit-shift-inst segment dst amount #b011)))
1797 (define-instruction shl (segment dst amount)
1799 (shift-inst-printer-list #b100))
1801 (emit-shift-inst segment dst amount #b100)))
1803 (define-instruction shr (segment dst amount)
1805 (shift-inst-printer-list #b101))
1807 (emit-shift-inst segment dst amount #b101)))
1809 (define-instruction sar (segment dst amount)
1811 (shift-inst-printer-list #b111))
1813 (emit-shift-inst segment dst amount #b111)))
1815 (defun emit-double-shift (segment opcode dst src amt)
1816 (let ((size (matching-operand-size dst src)))
1817 (when (eq size :byte)
1818 (error "Double shifts can only be used with words."))
1819 (maybe-emit-operand-size-prefix segment size)
1820 (maybe-emit-rex-for-ea segment dst src)
1821 (emit-byte segment #b00001111)
1822 (emit-byte segment (dpb opcode (byte 1 3)
1823 (if (eq amt :cl) #b10100101 #b10100100)))
1824 (emit-ea segment dst (reg-tn-encoding src))
1825 (unless (eq amt :cl)
1826 (emit-byte segment amt))))
1828 (eval-when (:compile-toplevel :execute)
1829 (defun double-shift-inst-printer-list (op)
1831 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
1832 (imm nil :type signed-imm-byte)))
1833 (ext-reg-reg/mem ((op ,(logior op #b101)))
1834 (:name :tab reg/mem ", " 'cl)))))
1836 (define-instruction shld (segment dst src amt)
1837 (:declare (type (or (member :cl) (mod 32)) amt))
1838 (:printer-list (double-shift-inst-printer-list #b10100000))
1840 (emit-double-shift segment #b0 dst src amt)))
1842 (define-instruction shrd (segment dst src amt)
1843 (:declare (type (or (member :cl) (mod 32)) amt))
1844 (:printer-list (double-shift-inst-printer-list #b10101000))
1846 (emit-double-shift segment #b1 dst src amt)))
1848 (define-instruction and (segment dst src)
1850 (arith-inst-printer-list #b100))
1852 (emit-random-arith-inst "AND" segment dst src #b100)))
1854 (define-instruction test (segment this that)
1855 (:printer accum-imm ((op #b1010100)))
1856 (:printer rex-accum-imm ((op #b1010100)))
1857 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1858 (:printer rex-reg/mem-imm ((op '(#b11110111 #b000))))
1859 (:printer reg-reg/mem ((op #b1000010)))
1860 (:printer rex-reg-reg/mem ((op #b10000101)))
1862 (let ((size (matching-operand-size this that)))
1863 (maybe-emit-operand-size-prefix segment size)
1864 (flet ((test-immed-and-something (immed something)
1865 (cond ((accumulator-p something)
1866 (maybe-emit-rex-for-ea segment something nil)
1868 (if (eq size :byte) #b10101000 #b10101001))
1869 (emit-sized-immediate segment size immed))
1871 (maybe-emit-rex-for-ea segment something nil)
1873 (if (eq size :byte) #b11110110 #b11110111))
1874 (emit-ea segment something #b000)
1875 (emit-sized-immediate segment size immed))))
1876 (test-reg-and-something (reg something)
1877 (maybe-emit-rex-for-ea segment something reg)
1878 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1879 (emit-ea segment something (reg-tn-encoding reg))))
1880 (cond ((integerp that)
1881 (test-immed-and-something that this))
1883 (test-immed-and-something this that))
1885 (test-reg-and-something this that))
1887 (test-reg-and-something that this))
1889 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1891 (define-instruction or (segment dst src)
1893 (arith-inst-printer-list #b001))
1895 (emit-random-arith-inst "OR" segment dst src #b001)))
1897 (define-instruction xor (segment dst src)
1899 (arith-inst-printer-list #b110))
1901 (emit-random-arith-inst "XOR" segment dst src #b110)))
1903 (define-instruction not (segment dst)
1904 (:printer reg/mem ((op '(#b1111011 #b010))))
1906 (let ((size (operand-size dst)))
1907 (maybe-emit-operand-size-prefix segment size)
1908 (maybe-emit-rex-for-ea segment dst nil)
1909 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1910 (emit-ea segment dst #b010))))
1912 ;;;; string manipulation
1914 (define-instruction cmps (segment size)
1915 (:printer string-op ((op #b1010011)))
1916 (:printer rex-string-op ((op #b1010011)))
1918 (maybe-emit-operand-size-prefix segment size)
1919 (maybe-emit-rex-prefix segment size nil nil nil)
1920 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1922 (define-instruction ins (segment acc)
1923 (:printer string-op ((op #b0110110)))
1924 (:printer rex-string-op ((op #b0110110)))
1926 (let ((size (operand-size acc)))
1927 (aver (accumulator-p acc))
1928 (maybe-emit-operand-size-prefix segment size)
1929 (maybe-emit-rex-prefix segment size nil nil nil)
1930 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1932 (define-instruction lods (segment acc)
1933 (:printer string-op ((op #b1010110)))
1934 (:printer rex-string-op ((op #b1010110)))
1936 (let ((size (operand-size acc)))
1937 (aver (accumulator-p acc))
1938 (maybe-emit-operand-size-prefix segment size)
1939 (maybe-emit-rex-prefix segment size nil nil nil)
1940 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1942 (define-instruction movs (segment size)
1943 (:printer string-op ((op #b1010010)))
1944 (:printer rex-string-op ((op #b1010010)))
1946 (maybe-emit-operand-size-prefix segment size)
1947 (maybe-emit-rex-prefix segment size nil nil nil)
1948 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1950 (define-instruction outs (segment acc)
1951 (:printer string-op ((op #b0110111)))
1952 (:printer rex-string-op ((op #b0110111)))
1954 (let ((size (operand-size acc)))
1955 (aver (accumulator-p acc))
1956 (maybe-emit-operand-size-prefix segment size)
1957 (maybe-emit-rex-prefix segment size nil nil nil)
1958 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1960 (define-instruction scas (segment acc)
1961 (:printer string-op ((op #b1010111)))
1962 (:printer rex-string-op ((op #b1010111)))
1964 (let ((size (operand-size acc)))
1965 (aver (accumulator-p acc))
1966 (maybe-emit-operand-size-prefix segment size)
1967 (maybe-emit-rex-prefix segment size nil nil nil)
1968 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1970 (define-instruction stos (segment acc)
1971 (:printer string-op ((op #b1010101)))
1972 (:printer rex-string-op ((op #b1010101)))
1974 (let ((size (operand-size acc)))
1975 (aver (accumulator-p acc))
1976 (maybe-emit-operand-size-prefix segment size)
1977 (maybe-emit-rex-prefix segment size nil nil nil)
1978 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1980 (define-instruction xlat (segment)
1981 (:printer byte ((op #b11010111)))
1983 (emit-byte segment #b11010111)))
1985 (define-instruction rep (segment)
1987 (emit-byte segment #b11110010)))
1989 (define-instruction repe (segment)
1990 (:printer byte ((op #b11110011)))
1992 (emit-byte segment #b11110011)))
1994 (define-instruction repne (segment)
1995 (:printer byte ((op #b11110010)))
1997 (emit-byte segment #b11110010)))
2000 ;;;; bit manipulation
2002 (define-instruction bsf (segment dst src)
2003 (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
2005 (let ((size (matching-operand-size dst src)))
2006 (when (eq size :byte)
2007 (error "can't scan bytes: ~S" src))
2008 (maybe-emit-operand-size-prefix segment size)
2009 (maybe-emit-rex-for-ea segment src dst)
2010 (emit-byte segment #b00001111)
2011 (emit-byte segment #b10111100)
2012 (emit-ea segment src (reg-tn-encoding dst)))))
2014 (define-instruction bsr (segment dst src)
2015 (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
2017 (let ((size (matching-operand-size dst src)))
2018 (when (eq size :byte)
2019 (error "can't scan bytes: ~S" src))
2020 (maybe-emit-operand-size-prefix segment size)
2021 (maybe-emit-rex-for-ea segment src dst)
2022 (emit-byte segment #b00001111)
2023 (emit-byte segment #b10111101)
2024 (emit-ea segment src (reg-tn-encoding dst)))))
2026 (defun emit-bit-test-and-mumble (segment src index opcode)
2027 (let ((size (operand-size src)))
2028 (when (eq size :byte)
2029 (error "can't scan bytes: ~S" src))
2030 (maybe-emit-operand-size-prefix segment size)
2031 (cond ((integerp index)
2032 (maybe-emit-rex-for-ea segment src nil)
2033 (emit-byte segment #b00001111)
2034 (emit-byte segment #b10111010)
2035 (emit-ea segment src opcode)
2036 (emit-byte segment index))
2038 (maybe-emit-rex-for-ea segment src index)
2039 (emit-byte segment #b00001111)
2040 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2041 (emit-ea segment src (reg-tn-encoding index))))))
2043 (eval-when (:compile-toplevel :execute)
2044 (defun bit-test-inst-printer-list (subop)
2045 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2046 (reg/mem nil :type word-reg/mem)
2047 (imm nil :type imm-data)
2049 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2051 (:name :tab reg/mem ", " reg)))))
2053 (define-instruction bt (segment src index)
2054 (:printer-list (bit-test-inst-printer-list #b100))
2056 (emit-bit-test-and-mumble segment src index #b100)))
2058 (define-instruction btc (segment src index)
2059 (:printer-list (bit-test-inst-printer-list #b111))
2061 (emit-bit-test-and-mumble segment src index #b111)))
2063 (define-instruction btr (segment src index)
2064 (:printer-list (bit-test-inst-printer-list #b110))
2066 (emit-bit-test-and-mumble segment src index #b110)))
2068 (define-instruction bts (segment src index)
2069 (:printer-list (bit-test-inst-printer-list #b101))
2071 (emit-bit-test-and-mumble segment src index #b101)))
2074 ;;;; control transfer
2076 (define-instruction call (segment where)
2077 (:printer near-jump ((op #b11101000)))
2078 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
2082 (maybe-emit-rex-for-ea segment where nil)
2083 (emit-byte segment #b11101000) ; 32 bit relative
2084 (emit-back-patch segment
2086 (lambda (segment posn)
2088 (- (label-position where)
2091 (maybe-emit-rex-for-ea segment where nil)
2092 (emit-byte segment #b11101000)
2093 (emit-relative-fixup segment where))
2095 (maybe-emit-rex-for-ea segment where nil)
2096 (emit-byte segment #b11111111)
2097 (emit-ea segment where #b010)))))
2099 (defun emit-byte-displacement-backpatch (segment target)
2100 (emit-back-patch segment
2102 (lambda (segment posn)
2103 (let ((disp (- (label-position target) (1+ posn))))
2104 (aver (<= -128 disp 127))
2105 (emit-byte segment disp)))))
2107 (define-instruction jmp (segment cond &optional where)
2108 ;; conditional jumps
2109 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2110 (:printer near-cond-jump () '('j cc :tab label))
2111 ;; unconditional jumps
2112 (:printer short-jump ((op #b1011)))
2113 (:printer near-jump ((op #b11101001)) )
2114 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
2119 (lambda (segment posn delta-if-after)
2120 (let ((disp (- (label-position where posn delta-if-after)
2122 (when (<= -128 disp 127)
2124 (dpb (conditional-opcode cond)
2127 (emit-byte-displacement-backpatch segment where)
2129 (lambda (segment posn)
2130 (let ((disp (- (label-position where) (+ posn 6))))
2131 (emit-byte segment #b00001111)
2133 (dpb (conditional-opcode cond)
2136 (emit-dword segment disp)))))
2137 ((label-p (setq where cond))
2140 (lambda (segment posn delta-if-after)
2141 (let ((disp (- (label-position where posn delta-if-after)
2143 (when (<= -128 disp 127)
2144 (emit-byte segment #b11101011)
2145 (emit-byte-displacement-backpatch segment where)
2147 (lambda (segment posn)
2148 (let ((disp (- (label-position where) (+ posn 5))))
2149 (emit-byte segment #b11101001)
2150 (emit-dword segment disp)))))
2152 (emit-byte segment #b11101001)
2153 (emit-relative-fixup segment where))
2155 (unless (or (ea-p where) (tn-p where))
2156 (error "don't know what to do with ~A" where))
2157 (maybe-emit-rex-for-ea segment where nil)
2158 (emit-byte segment #b11111111)
2159 (emit-ea segment where #b100)))))
2161 (define-instruction jmp-short (segment label)
2163 (emit-byte segment #b11101011)
2164 (emit-byte-displacement-backpatch segment label)))
2166 (define-instruction ret (segment &optional stack-delta)
2167 (:printer byte ((op #b11000011)))
2168 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2172 (emit-byte segment #b11000010)
2173 (emit-word segment stack-delta))
2175 (emit-byte segment #b11000011)))))
2177 (define-instruction jecxz (segment target)
2178 (:printer short-jump ((op #b0011)))
2180 (emit-byte segment #b11100011)
2181 (emit-byte-displacement-backpatch segment target)))
2183 (define-instruction loop (segment target)
2184 (:printer short-jump ((op #b0010)))
2186 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2187 (emit-byte-displacement-backpatch segment target)))
2189 (define-instruction loopz (segment target)
2190 (:printer short-jump ((op #b0001)))
2192 (emit-byte segment #b11100001)
2193 (emit-byte-displacement-backpatch segment target)))
2195 (define-instruction loopnz (segment target)
2196 (:printer short-jump ((op #b0000)))
2198 (emit-byte segment #b11100000)
2199 (emit-byte-displacement-backpatch segment target)))
2201 ;;;; conditional move
2202 (define-instruction cmov (segment cond dst src)
2203 (:printer cond-move ())
2205 (aver (register-p dst))
2206 (let ((size (matching-operand-size dst src)))
2207 (aver (or (eq size :word) (eq size :dword) (eq size :qword) ))
2208 (maybe-emit-operand-size-prefix segment size))
2209 (maybe-emit-rex-for-ea segment src dst)
2210 (emit-byte segment #b00001111)
2211 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2212 (emit-ea segment src (reg-tn-encoding dst))))
2214 ;;;; conditional byte set
2216 (define-instruction set (segment dst cond)
2217 (:printer cond-set ())
2219 (maybe-emit-rex-for-ea segment dst nil)
2220 (emit-byte segment #b00001111)
2221 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2222 (emit-ea segment dst #b000)))
2226 (define-instruction enter (segment disp &optional (level 0))
2227 (:declare (type (unsigned-byte 16) disp)
2228 (type (unsigned-byte 8) level))
2229 (:printer enter-format ((op #b11001000)))
2231 (emit-byte segment #b11001000)
2232 (emit-word segment disp)
2233 (emit-byte segment level)))
2235 (define-instruction leave (segment)
2236 (:printer byte ((op #b11001001)))
2238 (emit-byte segment #b11001001)))
2240 ;;;; interrupt instructions
2242 (defun snarf-error-junk (sap offset &optional length-only)
2243 (let* ((length (sb!sys:sap-ref-8 sap offset))
2244 (vector (make-array length :element-type '(unsigned-byte 8))))
2245 (declare (type sb!sys:system-area-pointer sap)
2246 (type (unsigned-byte 8) length)
2247 (type (simple-array (unsigned-byte 8) (*)) vector))
2249 (values 0 (1+ length) nil nil))
2251 (sb!kernel:copy-from-system-area sap (* n-byte-bits (1+ offset))
2252 vector (* n-word-bits
2254 (* length n-byte-bits))
2255 (collect ((sc-offsets)
2257 (lengths 1) ; the length byte
2259 (error-number (sb!c:read-var-integer vector index)))
2262 (when (>= index length)
2264 (let ((old-index index))
2265 (sc-offsets (sb!c:read-var-integer vector index))
2266 (lengths (- index old-index))))
2267 (values error-number
2273 (defmacro break-cases (breaknum &body cases)
2274 (let ((bn-temp (gensym)))
2275 (collect ((clauses))
2276 (dolist (case cases)
2277 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2278 `(let ((,bn-temp ,breaknum))
2279 (cond ,@(clauses))))))
2282 (defun break-control (chunk inst stream dstate)
2283 (declare (ignore inst))
2284 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2285 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2286 ;; map has it undefined; and it should be easier to look in the target
2287 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2288 ;; from first principles whether it's defined in some way that genesis
2290 (case (byte-imm-code chunk dstate)
2293 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2296 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2298 (nt "breakpoint trap"))
2299 (#.pending-interrupt-trap
2300 (nt "pending interrupt trap"))
2303 (#.fun-end-breakpoint-trap
2304 (nt "function end breakpoint trap")))))
2306 (define-instruction break (segment code)
2307 (:declare (type (unsigned-byte 8) code))
2308 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2309 :control #'break-control)
2311 (emit-byte segment #b11001100)
2312 (emit-byte segment code)))
2314 (define-instruction int (segment number)
2315 (:declare (type (unsigned-byte 8) number))
2316 (:printer byte-imm ((op #b11001101)))
2320 (emit-byte segment #b11001100))
2322 (emit-byte segment #b11001101)
2323 (emit-byte segment number)))))
2325 (define-instruction into (segment)
2326 (:printer byte ((op #b11001110)))
2328 (emit-byte segment #b11001110)))
2330 (define-instruction bound (segment reg bounds)
2332 (let ((size (matching-operand-size reg bounds)))
2333 (when (eq size :byte)
2334 (error "can't bounds-test bytes: ~S" reg))
2335 (maybe-emit-operand-size-prefix segment size)
2336 (maybe-emit-rex-for-ea segment bounds reg)
2337 (emit-byte segment #b01100010)
2338 (emit-ea segment bounds (reg-tn-encoding reg)))))
2340 (define-instruction iret (segment)
2341 (:printer byte ((op #b11001111)))
2343 (emit-byte segment #b11001111)))
2345 ;;;; processor control
2347 (define-instruction hlt (segment)
2348 (:printer byte ((op #b11110100)))
2350 (emit-byte segment #b11110100)))
2352 (define-instruction nop (segment)
2353 (:printer byte ((op #b10010000)))
2355 (emit-byte segment #b10010000)))
2357 (define-instruction wait (segment)
2358 (:printer byte ((op #b10011011)))
2360 (emit-byte segment #b10011011)))
2362 (define-instruction lock (segment)
2363 (:printer byte ((op #b11110000)))
2365 (emit-byte segment #b11110000)))
2367 ;;;; miscellaneous hackery
2369 (define-instruction byte (segment byte)
2371 (emit-byte segment byte)))
2373 (define-instruction word (segment word)
2375 (emit-word segment word)))
2377 (define-instruction dword (segment dword)
2379 (emit-dword segment dword)))
2381 (defun emit-header-data (segment type)
2382 (emit-back-patch segment
2384 (lambda (segment posn)
2388 (component-header-length))
2392 (define-instruction simple-fun-header-word (segment)
2394 (emit-header-data segment simple-fun-header-widetag)))
2396 (define-instruction lra-header-word (segment)
2398 (emit-header-data segment return-pc-header-widetag)))
2400 ;;;; fp instructions
2402 ;;;; Note: We treat the single-precision and double-precision variants
2403 ;;;; as separate instructions.
2405 ;;; Load single to st(0).
2406 (define-instruction fld (segment source)
2407 (:printer floating-point ((op '(#b001 #b000))))
2409 (and (not (fp-reg-tn-p source))
2410 (maybe-emit-rex-for-ea segment source nil))
2411 (emit-byte segment #b11011001)
2412 (emit-fp-op segment source #b000)))
2414 ;;; Load double to st(0).
2415 (define-instruction fldd (segment source)
2416 (:printer floating-point ((op '(#b101 #b000))))
2417 (:printer floating-point-fp ((op '(#b001 #b000))))
2419 (if (fp-reg-tn-p source)
2420 (emit-byte segment #b11011001)
2422 (maybe-emit-rex-for-ea segment source nil)
2423 (emit-byte segment #b11011101)))
2424 (emit-fp-op segment source #b000)))
2426 ;;; Load long to st(0).
2427 (define-instruction fldl (segment source)
2428 (:printer floating-point ((op '(#b011 #b101))))
2430 (and (not (fp-reg-tn-p source))
2431 (maybe-emit-rex-for-ea segment source nil))
2432 (emit-byte segment #b11011011)
2433 (emit-fp-op segment source #b101)))
2435 ;;; Store single from st(0).
2436 (define-instruction fst (segment dest)
2437 (:printer floating-point ((op '(#b001 #b010))))
2439 (cond ((fp-reg-tn-p dest)
2440 (emit-byte segment #b11011101)
2441 (emit-fp-op segment dest #b010))
2443 (maybe-emit-rex-for-ea segment dest nil)
2444 (emit-byte segment #b11011001)
2445 (emit-fp-op segment dest #b010)))))
2447 ;;; Store double from st(0).
2448 (define-instruction fstd (segment dest)
2449 (:printer floating-point ((op '(#b101 #b010))))
2450 (:printer floating-point-fp ((op '(#b101 #b010))))
2452 (cond ((fp-reg-tn-p dest)
2453 (emit-byte segment #b11011101)
2454 (emit-fp-op segment dest #b010))
2456 (maybe-emit-rex-for-ea segment dest nil)
2457 (emit-byte segment #b11011101)
2458 (emit-fp-op segment dest #b010)))))
2460 ;;; Arithmetic ops are all done with at least one operand at top of
2461 ;;; stack. The other operand is is another register or a 32/64 bit
2464 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2465 ;;; that these conflict with the Gdb conventions for binops. To reduce
2466 ;;; the confusion I've added comments showing the mathamatical
2467 ;;; operation and the two syntaxes. By the ASM386 convention the
2468 ;;; instruction syntax is:
2471 ;;; or Fop Destination, Source
2473 ;;; If only one operand is given then it is the source and the
2474 ;;; destination is ST(0). There are reversed forms of the fsub and
2475 ;;; fdiv instructions inducated by an 'R' suffix.
2477 ;;; The mathematical operation for the non-reverse form is always:
2478 ;;; destination = destination op source
2480 ;;; For the reversed form it is:
2481 ;;; destination = source op destination
2483 ;;; The instructions below only accept one operand at present which is
2484 ;;; usually the source. I've hack in extra instructions to implement
2485 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2486 ;;; the operand is the destination with the source being ST(0).
2489 ;;; st(0) = st(0) + memory or st(i).
2490 (define-instruction fadd (segment source)
2491 (:printer floating-point ((op '(#b000 #b000))))
2493 (and (not (fp-reg-tn-p source))
2494 (maybe-emit-rex-for-ea segment source nil))
2495 (emit-byte segment #b11011000)
2496 (emit-fp-op segment source #b000)))
2499 ;;; st(0) = st(0) + memory or st(i).
2500 (define-instruction faddd (segment source)
2501 (:printer floating-point ((op '(#b100 #b000))))
2502 (:printer floating-point-fp ((op '(#b000 #b000))))
2504 (and (not (fp-reg-tn-p source))
2505 (maybe-emit-rex-for-ea segment source nil))
2506 (if (fp-reg-tn-p source)
2507 (emit-byte segment #b11011000)
2508 (emit-byte segment #b11011100))
2509 (emit-fp-op segment source #b000)))
2511 ;;; Add double destination st(i):
2512 ;;; st(i) = st(0) + st(i).
2513 (define-instruction fadd-sti (segment destination)
2514 (:printer floating-point-fp ((op '(#b100 #b000))))
2516 (aver (fp-reg-tn-p destination))
2517 (emit-byte segment #b11011100)
2518 (emit-fp-op segment destination #b000)))
2520 (define-instruction faddp-sti (segment destination)
2521 (:printer floating-point-fp ((op '(#b110 #b000))))
2523 (aver (fp-reg-tn-p destination))
2524 (emit-byte segment #b11011110)
2525 (emit-fp-op segment destination #b000)))
2527 ;;; Subtract single:
2528 ;;; st(0) = st(0) - memory or st(i).
2529 (define-instruction fsub (segment source)
2530 (:printer floating-point ((op '(#b000 #b100))))
2532 (and (not (fp-reg-tn-p source))
2533 (maybe-emit-rex-for-ea segment source nil))
2534 (emit-byte segment #b11011000)
2535 (emit-fp-op segment source #b100)))
2537 ;;; Subtract single, reverse:
2538 ;;; st(0) = memory or st(i) - st(0).
2539 (define-instruction fsubr (segment source)
2540 (:printer floating-point ((op '(#b000 #b101))))
2542 (and (not (fp-reg-tn-p source))
2543 (maybe-emit-rex-for-ea segment source nil))
2544 (emit-byte segment #b11011000)
2545 (emit-fp-op segment source #b101)))
2547 ;;; Subtract double:
2548 ;;; st(0) = st(0) - memory or st(i).
2549 (define-instruction fsubd (segment source)
2550 (:printer floating-point ((op '(#b100 #b100))))
2551 (:printer floating-point-fp ((op '(#b000 #b100))))
2553 (if (fp-reg-tn-p source)
2554 (emit-byte segment #b11011000)
2556 (and (not (fp-reg-tn-p source))
2557 (maybe-emit-rex-for-ea segment source nil))
2558 (emit-byte segment #b11011100)))
2559 (emit-fp-op segment source #b100)))
2561 ;;; Subtract double, reverse:
2562 ;;; st(0) = memory or st(i) - st(0).
2563 (define-instruction fsubrd (segment source)
2564 (:printer floating-point ((op '(#b100 #b101))))
2565 (:printer floating-point-fp ((op '(#b000 #b101))))
2567 (if (fp-reg-tn-p source)
2568 (emit-byte segment #b11011000)
2570 (and (not (fp-reg-tn-p source))
2571 (maybe-emit-rex-for-ea segment source nil))
2572 (emit-byte segment #b11011100)))
2573 (emit-fp-op segment source #b101)))
2575 ;;; Subtract double, destination st(i):
2576 ;;; st(i) = st(i) - st(0).
2578 ;;; ASM386 syntax: FSUB ST(i), ST
2579 ;;; Gdb syntax: fsubr %st,%st(i)
2580 (define-instruction fsub-sti (segment destination)
2581 (:printer floating-point-fp ((op '(#b100 #b101))))
2583 (aver (fp-reg-tn-p destination))
2584 (emit-byte segment #b11011100)
2585 (emit-fp-op segment destination #b101)))
2587 (define-instruction fsubp-sti (segment destination)
2588 (:printer floating-point-fp ((op '(#b110 #b101))))
2590 (aver (fp-reg-tn-p destination))
2591 (emit-byte segment #b11011110)
2592 (emit-fp-op segment destination #b101)))
2594 ;;; Subtract double, reverse, destination st(i):
2595 ;;; st(i) = st(0) - st(i).
2597 ;;; ASM386 syntax: FSUBR ST(i), ST
2598 ;;; Gdb syntax: fsub %st,%st(i)
2599 (define-instruction fsubr-sti (segment destination)
2600 (:printer floating-point-fp ((op '(#b100 #b100))))
2602 (aver (fp-reg-tn-p destination))
2603 (emit-byte segment #b11011100)
2604 (emit-fp-op segment destination #b100)))
2606 (define-instruction fsubrp-sti (segment destination)
2607 (:printer floating-point-fp ((op '(#b110 #b100))))
2609 (aver (fp-reg-tn-p destination))
2610 (emit-byte segment #b11011110)
2611 (emit-fp-op segment destination #b100)))
2613 ;;; Multiply single:
2614 ;;; st(0) = st(0) * memory or st(i).
2615 (define-instruction fmul (segment source)
2616 (:printer floating-point ((op '(#b000 #b001))))
2618 (and (not (fp-reg-tn-p source))
2619 (maybe-emit-rex-for-ea segment source nil))
2620 (emit-byte segment #b11011000)
2621 (emit-fp-op segment source #b001)))
2623 ;;; Multiply double:
2624 ;;; st(0) = st(0) * memory or st(i).
2625 (define-instruction fmuld (segment source)
2626 (:printer floating-point ((op '(#b100 #b001))))
2627 (:printer floating-point-fp ((op '(#b000 #b001))))
2629 (if (fp-reg-tn-p source)
2630 (emit-byte segment #b11011000)
2632 (and (not (fp-reg-tn-p source))
2633 (maybe-emit-rex-for-ea segment source nil))
2634 (emit-byte segment #b11011100)))
2635 (emit-fp-op segment source #b001)))
2637 ;;; Multiply double, destination st(i):
2638 ;;; st(i) = st(i) * st(0).
2639 (define-instruction fmul-sti (segment destination)
2640 (:printer floating-point-fp ((op '(#b100 #b001))))
2642 (aver (fp-reg-tn-p destination))
2643 (emit-byte segment #b11011100)
2644 (emit-fp-op segment destination #b001)))
2647 ;;; st(0) = st(0) / memory or st(i).
2648 (define-instruction fdiv (segment source)
2649 (:printer floating-point ((op '(#b000 #b110))))
2651 (and (not (fp-reg-tn-p source))
2652 (maybe-emit-rex-for-ea segment source nil))
2653 (emit-byte segment #b11011000)
2654 (emit-fp-op segment source #b110)))
2656 ;;; Divide single, reverse:
2657 ;;; st(0) = memory or st(i) / st(0).
2658 (define-instruction fdivr (segment source)
2659 (:printer floating-point ((op '(#b000 #b111))))
2661 (and (not (fp-reg-tn-p source))
2662 (maybe-emit-rex-for-ea segment source nil))
2663 (emit-byte segment #b11011000)
2664 (emit-fp-op segment source #b111)))
2667 ;;; st(0) = st(0) / memory or st(i).
2668 (define-instruction fdivd (segment source)
2669 (:printer floating-point ((op '(#b100 #b110))))
2670 (:printer floating-point-fp ((op '(#b000 #b110))))
2672 (if (fp-reg-tn-p source)
2673 (emit-byte segment #b11011000)
2675 (and (not (fp-reg-tn-p source))
2676 (maybe-emit-rex-for-ea segment source nil))
2677 (emit-byte segment #b11011100)))
2678 (emit-fp-op segment source #b110)))
2680 ;;; Divide double, reverse:
2681 ;;; st(0) = memory or st(i) / st(0).
2682 (define-instruction fdivrd (segment source)
2683 (:printer floating-point ((op '(#b100 #b111))))
2684 (:printer floating-point-fp ((op '(#b000 #b111))))
2686 (if (fp-reg-tn-p source)
2687 (emit-byte segment #b11011000)
2689 (and (not (fp-reg-tn-p source))
2690 (maybe-emit-rex-for-ea segment source nil))
2691 (emit-byte segment #b11011100)))
2692 (emit-fp-op segment source #b111)))
2694 ;;; Divide double, destination st(i):
2695 ;;; st(i) = st(i) / st(0).
2697 ;;; ASM386 syntax: FDIV ST(i), ST
2698 ;;; Gdb syntax: fdivr %st,%st(i)
2699 (define-instruction fdiv-sti (segment destination)
2700 (:printer floating-point-fp ((op '(#b100 #b111))))
2702 (aver (fp-reg-tn-p destination))
2703 (emit-byte segment #b11011100)
2704 (emit-fp-op segment destination #b111)))
2706 ;;; Divide double, reverse, destination st(i):
2707 ;;; st(i) = st(0) / st(i).
2709 ;;; ASM386 syntax: FDIVR ST(i), ST
2710 ;;; Gdb syntax: fdiv %st,%st(i)
2711 (define-instruction fdivr-sti (segment destination)
2712 (:printer floating-point-fp ((op '(#b100 #b110))))
2714 (aver (fp-reg-tn-p destination))
2715 (emit-byte segment #b11011100)
2716 (emit-fp-op segment destination #b110)))
2718 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2719 (define-instruction fxch (segment source)
2720 (:printer floating-point-fp ((op '(#b001 #b001))))
2722 (unless (and (tn-p source)
2723 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2725 (emit-byte segment #b11011001)
2726 (emit-fp-op segment source #b001)))
2728 ;;; Push 32-bit integer to st0.
2729 (define-instruction fild (segment source)
2730 (:printer floating-point ((op '(#b011 #b000))))
2732 (and (not (fp-reg-tn-p source))
2733 (maybe-emit-rex-for-ea segment source nil))
2734 (emit-byte segment #b11011011)
2735 (emit-fp-op segment source #b000)))
2737 ;;; Push 64-bit integer to st0.
2738 (define-instruction fildl (segment source)
2739 (:printer floating-point ((op '(#b111 #b101))))
2741 (and (not (fp-reg-tn-p source))
2742 (maybe-emit-rex-for-ea segment source nil))
2743 (emit-byte segment #b11011111)
2744 (emit-fp-op segment source #b101)))
2746 ;;; Store 32-bit integer.
2747 (define-instruction fist (segment dest)
2748 (:printer floating-point ((op '(#b011 #b010))))
2750 (and (not (fp-reg-tn-p dest))
2751 (maybe-emit-rex-for-ea segment dest nil))
2752 (emit-byte segment #b11011011)
2753 (emit-fp-op segment dest #b010)))
2755 ;;; Store and pop 32-bit integer.
2756 (define-instruction fistp (segment dest)
2757 (:printer floating-point ((op '(#b011 #b011))))
2759 (and (not (fp-reg-tn-p dest))
2760 (maybe-emit-rex-for-ea segment dest nil))
2761 (emit-byte segment #b11011011)
2762 (emit-fp-op segment dest #b011)))
2764 ;;; Store and pop 64-bit integer.
2765 (define-instruction fistpl (segment dest)
2766 (:printer floating-point ((op '(#b111 #b111))))
2768 (and (not (fp-reg-tn-p dest))
2769 (maybe-emit-rex-for-ea segment dest nil))
2770 (emit-byte segment #b11011111)
2771 (emit-fp-op segment dest #b111)))
2773 ;;; Store single from st(0) and pop.
2774 (define-instruction fstp (segment dest)
2775 (:printer floating-point ((op '(#b001 #b011))))
2777 (cond ((fp-reg-tn-p dest)
2778 (emit-byte segment #b11011101)
2779 (emit-fp-op segment dest #b011))
2781 (maybe-emit-rex-for-ea segment dest nil)
2782 (emit-byte segment #b11011001)
2783 (emit-fp-op segment dest #b011)))))
2785 ;;; Store double from st(0) and pop.
2786 (define-instruction fstpd (segment dest)
2787 (:printer floating-point ((op '(#b101 #b011))))
2788 (:printer floating-point-fp ((op '(#b101 #b011))))
2790 (cond ((fp-reg-tn-p dest)
2791 (emit-byte segment #b11011101)
2792 (emit-fp-op segment dest #b011))
2794 (maybe-emit-rex-for-ea segment dest nil)
2795 (emit-byte segment #b11011101)
2796 (emit-fp-op segment dest #b011)))))
2798 ;;; Store long from st(0) and pop.
2799 (define-instruction fstpl (segment dest)
2800 (:printer floating-point ((op '(#b011 #b111))))
2802 (and (not (fp-reg-tn-p dest))
2803 (maybe-emit-rex-for-ea segment dest nil))
2804 (emit-byte segment #b11011011)
2805 (emit-fp-op segment dest #b111)))
2807 ;;; Decrement stack-top pointer.
2808 (define-instruction fdecstp (segment)
2809 (:printer floating-point-no ((op #b10110)))
2811 (emit-byte segment #b11011001)
2812 (emit-byte segment #b11110110)))
2814 ;;; Increment stack-top pointer.
2815 (define-instruction fincstp (segment)
2816 (:printer floating-point-no ((op #b10111)))
2818 (emit-byte segment #b11011001)
2819 (emit-byte segment #b11110111)))
2821 ;;; Free fp register.
2822 (define-instruction ffree (segment dest)
2823 (:printer floating-point-fp ((op '(#b101 #b000))))
2825 (and (not (fp-reg-tn-p dest))
2826 (maybe-emit-rex-for-ea segment dest nil))
2827 (emit-byte segment #b11011101)
2828 (emit-fp-op segment dest #b000)))
2830 (define-instruction fabs (segment)
2831 (:printer floating-point-no ((op #b00001)))
2833 (emit-byte segment #b11011001)
2834 (emit-byte segment #b11100001)))
2836 (define-instruction fchs (segment)
2837 (:printer floating-point-no ((op #b00000)))
2839 (emit-byte segment #b11011001)
2840 (emit-byte segment #b11100000)))
2842 (define-instruction frndint(segment)
2843 (:printer floating-point-no ((op #b11100)))
2845 (emit-byte segment #b11011001)
2846 (emit-byte segment #b11111100)))
2849 (define-instruction fninit(segment)
2850 (:printer floating-point-5 ((op #b00011)))
2852 (emit-byte segment #b11011011)
2853 (emit-byte segment #b11100011)))
2855 ;;; Store Status Word to AX.
2856 (define-instruction fnstsw(segment)
2857 (:printer floating-point-st ((op #b00000)))
2859 (emit-byte segment #b11011111)
2860 (emit-byte segment #b11100000)))
2862 ;;; Load Control Word.
2864 ;;; src must be a memory location
2865 (define-instruction fldcw(segment src)
2866 (:printer floating-point ((op '(#b001 #b101))))
2868 (and (not (fp-reg-tn-p src))
2869 (maybe-emit-rex-for-ea segment src nil))
2870 (emit-byte segment #b11011001)
2871 (emit-fp-op segment src #b101)))
2873 ;;; Store Control Word.
2874 (define-instruction fnstcw(segment dst)
2875 (:printer floating-point ((op '(#b001 #b111))))
2877 (and (not (fp-reg-tn-p dst))
2878 (maybe-emit-rex-for-ea segment dst nil))
2879 (emit-byte segment #b11011001)
2880 (emit-fp-op segment dst #b111)))
2882 ;;; Store FP Environment.
2883 (define-instruction fstenv(segment dst)
2884 (:printer floating-point ((op '(#b001 #b110))))
2886 (and (not (fp-reg-tn-p dst))
2887 (maybe-emit-rex-for-ea segment dst nil))
2888 (emit-byte segment #b11011001)
2889 (emit-fp-op segment dst #b110)))
2891 ;;; Restore FP Environment.
2892 (define-instruction fldenv(segment src)
2893 (:printer floating-point ((op '(#b001 #b100))))
2895 (and (not (fp-reg-tn-p src))
2896 (maybe-emit-rex-for-ea segment src nil))
2897 (emit-byte segment #b11011001)
2898 (emit-fp-op segment src #b100)))
2901 (define-instruction fsave(segment dst)
2902 (:printer floating-point ((op '(#b101 #b110))))
2904 (and (not (fp-reg-tn-p dst))
2905 (maybe-emit-rex-for-ea segment dst nil))
2906 (emit-byte segment #b11011101)
2907 (emit-fp-op segment dst #b110)))
2909 ;;; Restore FP State.
2910 (define-instruction frstor(segment src)
2911 (:printer floating-point ((op '(#b101 #b100))))
2913 (and (not (fp-reg-tn-p src))
2914 (maybe-emit-rex-for-ea segment src nil))
2915 (emit-byte segment #b11011101)
2916 (emit-fp-op segment src #b100)))
2918 ;;; Clear exceptions.
2919 (define-instruction fnclex(segment)
2920 (:printer floating-point-5 ((op #b00010)))
2922 (emit-byte segment #b11011011)
2923 (emit-byte segment #b11100010)))
2926 (define-instruction fcom (segment src)
2927 (:printer floating-point ((op '(#b000 #b010))))
2929 (and (not (fp-reg-tn-p src))
2930 (maybe-emit-rex-for-ea segment src nil))
2931 (emit-byte segment #b11011000)
2932 (emit-fp-op segment src #b010)))
2934 (define-instruction fcomd (segment src)
2935 (:printer floating-point ((op '(#b100 #b010))))
2936 (:printer floating-point-fp ((op '(#b000 #b010))))
2938 (if (fp-reg-tn-p src)
2939 (emit-byte segment #b11011000)
2941 (maybe-emit-rex-for-ea segment src nil)
2942 (emit-byte segment #b11011100)))
2943 (emit-fp-op segment src #b010)))
2945 ;;; Compare ST1 to ST0, popping the stack twice.
2946 (define-instruction fcompp (segment)
2947 (:printer floating-point-3 ((op '(#b110 #b011001))))
2949 (emit-byte segment #b11011110)
2950 (emit-byte segment #b11011001)))
2952 ;;; unordered comparison
2953 (define-instruction fucom (segment src)
2954 (:printer floating-point-fp ((op '(#b101 #b100))))
2956 (aver (fp-reg-tn-p src))
2957 (emit-byte segment #b11011101)
2958 (emit-fp-op segment src #b100)))
2960 (define-instruction ftst (segment)
2961 (:printer floating-point-no ((op #b00100)))
2963 (emit-byte segment #b11011001)
2964 (emit-byte segment #b11100100)))
2968 (define-instruction fsqrt(segment)
2969 (:printer floating-point-no ((op #b11010)))
2971 (emit-byte segment #b11011001)
2972 (emit-byte segment #b11111010)))
2974 (define-instruction fscale(segment)
2975 (:printer floating-point-no ((op #b11101)))
2977 (emit-byte segment #b11011001)
2978 (emit-byte segment #b11111101)))
2980 (define-instruction fxtract(segment)
2981 (:printer floating-point-no ((op #b10100)))
2983 (emit-byte segment #b11011001)
2984 (emit-byte segment #b11110100)))
2986 (define-instruction fsin(segment)
2987 (:printer floating-point-no ((op #b11110)))
2989 (emit-byte segment #b11011001)
2990 (emit-byte segment #b11111110)))
2992 (define-instruction fcos(segment)
2993 (:printer floating-point-no ((op #b11111)))
2995 (emit-byte segment #b11011001)
2996 (emit-byte segment #b11111111)))
2998 (define-instruction fprem1(segment)
2999 (:printer floating-point-no ((op #b10101)))
3001 (emit-byte segment #b11011001)
3002 (emit-byte segment #b11110101)))
3004 (define-instruction fprem(segment)
3005 (:printer floating-point-no ((op #b11000)))
3007 (emit-byte segment #b11011001)
3008 (emit-byte segment #b11111000)))
3010 (define-instruction fxam (segment)
3011 (:printer floating-point-no ((op #b00101)))
3013 (emit-byte segment #b11011001)
3014 (emit-byte segment #b11100101)))
3016 ;;; These do push/pop to stack and need special handling
3017 ;;; in any VOPs that use them. See the book.
3019 ;;; st0 <- st1*log2(st0)
3020 (define-instruction fyl2x(segment) ; pops stack
3021 (:printer floating-point-no ((op #b10001)))
3023 (emit-byte segment #b11011001)
3024 (emit-byte segment #b11110001)))
3026 (define-instruction fyl2xp1(segment)
3027 (:printer floating-point-no ((op #b11001)))
3029 (emit-byte segment #b11011001)
3030 (emit-byte segment #b11111001)))
3032 (define-instruction f2xm1(segment)
3033 (:printer floating-point-no ((op #b10000)))
3035 (emit-byte segment #b11011001)
3036 (emit-byte segment #b11110000)))
3038 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
3039 (:printer floating-point-no ((op #b10010)))
3041 (emit-byte segment #b11011001)
3042 (emit-byte segment #b11110010)))
3044 (define-instruction fpatan(segment) ; POPS STACK
3045 (:printer floating-point-no ((op #b10011)))
3047 (emit-byte segment #b11011001)
3048 (emit-byte segment #b11110011)))
3050 ;;;; loading constants
3052 (define-instruction fldz(segment)
3053 (:printer floating-point-no ((op #b01110)))
3055 (emit-byte segment #b11011001)
3056 (emit-byte segment #b11101110)))
3058 (define-instruction fld1(segment)
3059 (:printer floating-point-no ((op #b01000)))
3061 (emit-byte segment #b11011001)
3062 (emit-byte segment #b11101000)))
3064 (define-instruction fldpi(segment)
3065 (:printer floating-point-no ((op #b01011)))
3067 (emit-byte segment #b11011001)
3068 (emit-byte segment #b11101011)))
3070 (define-instruction fldl2t(segment)
3071 (:printer floating-point-no ((op #b01001)))
3073 (emit-byte segment #b11011001)
3074 (emit-byte segment #b11101001)))
3076 (define-instruction fldl2e(segment)
3077 (:printer floating-point-no ((op #b01010)))
3079 (emit-byte segment #b11011001)
3080 (emit-byte segment #b11101010)))
3082 (define-instruction fldlg2(segment)
3083 (:printer floating-point-no ((op #b01100)))
3085 (emit-byte segment #b11011001)
3086 (emit-byte segment #b11101100)))
3088 (define-instruction fldln2(segment)
3089 (:printer floating-point-no ((op #b01101)))
3091 (emit-byte segment #b11011001)
3092 (emit-byte segment #b11101101)))
3094 ;; new xmm insns required by sse float
3095 ;; movsd andpd comisd comiss
3097 (define-instruction movsd (segment dst src)
3098 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3100 (cond ((typep src 'tn)
3101 (emit-byte segment #xf2)
3102 (maybe-emit-rex-for-ea segment dst src)
3103 (emit-byte segment #x0f)
3104 (emit-byte segment #x11)
3105 (emit-ea segment dst (reg-tn-encoding src)))
3107 (emit-byte segment #xf2)
3108 (maybe-emit-rex-for-ea segment src dst)
3109 (emit-byte segment #x0f)
3110 (emit-byte segment #x10)
3111 (emit-ea segment src (reg-tn-encoding dst))))))
3113 (define-instruction movss (segment dst src)
3114 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3117 (emit-byte segment #xf3)
3118 (maybe-emit-rex-for-ea segment dst src)
3119 (emit-byte segment #x0f)
3120 (emit-byte segment #x11)
3121 (emit-ea segment dst (reg-tn-encoding src)))
3123 (emit-byte segment #xf3)
3124 (maybe-emit-rex-for-ea segment src dst)
3125 (emit-byte segment #x0f)
3126 (emit-byte segment #x10)
3127 (emit-ea segment src (reg-tn-encoding dst))))))
3129 (define-instruction andpd (segment dst src)
3130 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3132 (emit-byte segment #x66)
3133 (maybe-emit-rex-for-ea segment src dst)
3134 (emit-byte segment #x0f)
3135 (emit-byte segment #x54)
3136 (emit-ea segment src (reg-tn-encoding dst))))
3138 (define-instruction andps (segment dst src)
3140 (maybe-emit-rex-for-ea segment src dst)
3141 (emit-byte segment #x0f)
3142 (emit-byte segment #x54)
3143 (emit-ea segment src (reg-tn-encoding dst))))
3145 (define-instruction comisd (segment dst src)
3146 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3148 (emit-byte segment #x66)
3149 (maybe-emit-rex-for-ea segment src dst)
3150 (emit-byte segment #x0f)
3151 (emit-byte segment #x2f)
3152 (emit-ea segment src (reg-tn-encoding dst))))
3154 (define-instruction comiss (segment dst src)
3155 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3157 (maybe-emit-rex-for-ea segment src dst)
3158 (emit-byte segment #x0f)
3159 (emit-byte segment #x2f)
3160 (emit-ea segment src (reg-tn-encoding dst))))
3162 ;; movd movq xorp xord
3164 ;; we only do the xmm version of movd
3165 (define-instruction movd (segment dst src)
3166 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3168 (cond ((typep dst 'tn)
3169 (emit-byte segment #x66)
3170 (maybe-emit-rex-for-ea segment src dst)
3171 (emit-byte segment #x0f)
3172 (emit-byte segment #x6e)
3173 (emit-ea segment src (reg-tn-encoding dst)))
3175 (emit-byte segment #x66)
3176 (maybe-emit-rex-for-ea segment dst src)
3177 (emit-byte segment #x0f)
3178 (emit-byte segment #x7e)
3179 (emit-ea segment dst (reg-tn-encoding src))))))
3181 (define-instruction movq (segment dst src)
3182 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3184 (cond ((typep dst 'tn)
3185 (emit-byte segment #xf3)
3186 (maybe-emit-rex-for-ea segment src dst)
3187 (emit-byte segment #x0f)
3188 (emit-byte segment #x7e)
3189 (emit-ea segment src (reg-tn-encoding dst)))
3191 (emit-byte segment #x66)
3192 (maybe-emit-rex-for-ea segment dst src)
3193 (emit-byte segment #x0f)
3194 (emit-byte segment #xd6)
3195 (emit-ea segment dst (reg-tn-encoding src))))))
3197 (define-instruction xorpd (segment dst src)
3198 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3200 (emit-byte segment #x66)
3201 (maybe-emit-rex-for-ea segment src dst)
3202 (emit-byte segment #x0f)
3203 (emit-byte segment #x57)
3204 (emit-ea segment src (reg-tn-encoding dst))))
3206 (define-instruction xorps (segment dst src)
3207 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3209 (maybe-emit-rex-for-ea segment src dst)
3210 (emit-byte segment #x0f)
3211 (emit-byte segment #x57)
3212 (emit-ea segment src (reg-tn-encoding dst))))
3214 (define-instruction cvtsd2si (segment dst src)
3215 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3217 (emit-byte segment #xf2)
3218 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3219 (emit-byte segment #x0f)
3220 (emit-byte segment #x2d)
3221 (emit-ea segment src (reg-tn-encoding dst))))
3223 (define-instruction cvtsd2ss (segment dst src)
3224 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3226 (emit-byte segment #xf2)
3227 (maybe-emit-rex-for-ea segment src dst)
3228 (emit-byte segment #x0f)
3229 (emit-byte segment #x5a)
3230 (emit-ea segment src (reg-tn-encoding dst))))
3232 (define-instruction cvtss2si (segment dst src)
3233 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3235 (emit-byte segment #xf3)
3236 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3237 (emit-byte segment #x0f)
3238 (emit-byte segment #x2d)
3239 (emit-ea segment src (reg-tn-encoding dst))))
3241 (define-instruction cvtss2sd (segment dst src)
3242 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3244 (emit-byte segment #xf3)
3245 (maybe-emit-rex-for-ea segment src dst)
3246 (emit-byte segment #x0f)
3247 (emit-byte segment #x5a)
3248 (emit-ea segment src (reg-tn-encoding dst))))
3250 (define-instruction cvtsi2ss (segment dst src)
3251 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3253 (emit-byte segment #xf3)
3254 (maybe-emit-rex-for-ea segment src dst)
3255 (emit-byte segment #x0f)
3256 (emit-byte segment #x2a)
3257 (emit-ea segment src (reg-tn-encoding dst))))
3259 (define-instruction cvtsi2sd (segment dst src)
3260 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3262 (emit-byte segment #xf2)
3263 (maybe-emit-rex-for-ea segment src dst)
3264 (emit-byte segment #x0f)
3265 (emit-byte segment #x2a)
3266 (emit-ea segment src (reg-tn-encoding dst))))
3268 (define-instruction cvtdq2pd (segment dst src)
3269 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3271 (emit-byte segment #xf3)
3272 (maybe-emit-rex-for-ea segment src dst)
3273 (emit-byte segment #x0f)
3274 (emit-byte segment #xe6)
3275 (emit-ea segment src (reg-tn-encoding dst))))
3277 (define-instruction cvtdq2ps (segment dst src)
3278 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3280 (maybe-emit-rex-for-ea segment src dst)
3281 (emit-byte segment #x0f)
3282 (emit-byte segment #x5b)
3283 (emit-ea segment src (reg-tn-encoding dst))))
3285 ;; CVTTSD2SI CVTTSS2SI
3287 (define-instruction cvttsd2si (segment dst src)
3288 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3290 (emit-byte segment #xf2)
3291 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3292 (emit-byte segment #x0f)
3293 (emit-byte segment #x2c)
3294 (emit-ea segment src (reg-tn-encoding dst))))
3296 (define-instruction cvttss2si (segment dst src)
3297 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3299 (emit-byte segment #xf3)
3300 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3301 (emit-byte segment #x0f)
3302 (emit-byte segment #x2c)
3303 (emit-ea segment src (reg-tn-encoding dst))))
3305 (define-instruction addsd (segment dst src)
3306 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3308 (emit-byte segment #xf2)
3309 (maybe-emit-rex-for-ea segment src dst)
3310 (emit-byte segment #x0f)
3311 (emit-byte segment #x58)
3312 (emit-ea segment src (reg-tn-encoding dst))))
3314 (define-instruction addss (segment dst src)
3315 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3317 (emit-byte segment #xf3)
3318 (maybe-emit-rex-for-ea segment src dst)
3319 (emit-byte segment #x0f)
3320 (emit-byte segment #x58)
3321 (emit-ea segment src (reg-tn-encoding dst))))
3323 (define-instruction divsd (segment dst src)
3324 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3326 (emit-byte segment #xf2)
3327 (maybe-emit-rex-for-ea segment src dst)
3328 (emit-byte segment #x0f)
3329 (emit-byte segment #x5e)
3330 (emit-ea segment src (reg-tn-encoding dst))))
3332 (define-instruction divss (segment dst src)
3333 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3335 (emit-byte segment #xf3)
3336 (maybe-emit-rex-for-ea segment src dst)
3337 (emit-byte segment #x0f)
3338 (emit-byte segment #x5e)
3339 (emit-ea segment src (reg-tn-encoding dst))))
3341 (define-instruction mulsd (segment dst src)
3342 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3344 (emit-byte segment #xf2)
3345 (maybe-emit-rex-for-ea segment src dst)
3346 (emit-byte segment #x0f)
3347 (emit-byte segment #x59)
3348 (emit-ea segment src (reg-tn-encoding dst))))
3350 (define-instruction mulss (segment dst src)
3351 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3353 (emit-byte segment #xf3)
3354 (maybe-emit-rex-for-ea segment src dst)
3355 (emit-byte segment #x0f)
3356 (emit-byte segment #x59)
3357 (emit-ea segment src (reg-tn-encoding dst))))
3359 (define-instruction subsd (segment dst src)
3360 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3362 (emit-byte segment #xf2)
3363 (maybe-emit-rex-for-ea segment src dst)
3364 (emit-byte segment #x0f)
3365 (emit-byte segment #x5c)
3366 (emit-ea segment src (reg-tn-encoding dst))))
3368 (define-instruction subss (segment dst src)
3369 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3371 (emit-byte segment #xf3)
3372 (maybe-emit-rex-for-ea segment src dst)
3373 (emit-byte segment #x0f)
3374 (emit-byte segment #x5c)
3375 (emit-ea segment src (reg-tn-encoding dst))))