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 (deftype reg () '(unsigned-byte 3))
23 (def!constant +default-operand-size+ :dword)
25 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
27 (defun offset-next (value dstate)
28 (declare (type integer value)
29 (type sb!disassem:disassem-state dstate))
30 (+ (sb!disassem:dstate-next-addr dstate) value))
32 (defparameter *default-address-size*
33 ;; Actually, :DWORD is the only one really supported.
36 (defparameter *byte-reg-names*
37 #(al cl dl bl ah ch dh bh))
38 (defparameter *word-reg-names*
39 #(ax cx dx bx sp bp si di))
40 (defparameter *dword-reg-names*
41 #(eax ecx edx ebx esp ebp esi edi))
43 (defun print-reg-with-width (value width stream dstate)
44 (declare (ignore dstate))
45 (princ (aref (ecase width
46 (:byte *byte-reg-names*)
47 (:word *word-reg-names*)
48 (:dword *dword-reg-names*))
51 ;; XXX plus should do some source-var notes
54 (defun print-reg (value stream dstate)
55 (declare (type reg value)
57 (type sb!disassem:disassem-state dstate))
58 (print-reg-with-width value
59 (sb!disassem:dstate-get-prop dstate 'width)
63 (defun print-word-reg (value stream dstate)
64 (declare (type reg value)
66 (type sb!disassem:disassem-state dstate))
67 (print-reg-with-width value
68 (or (sb!disassem:dstate-get-prop dstate 'word-width)
69 +default-operand-size+)
73 (defun print-byte-reg (value stream dstate)
74 (declare (type reg value)
76 (type sb!disassem:disassem-state dstate))
77 (print-reg-with-width value :byte stream dstate))
79 (defun print-addr-reg (value stream dstate)
80 (declare (type reg value)
82 (type sb!disassem:disassem-state dstate))
83 (print-reg-with-width value *default-address-size* stream dstate))
85 (defun print-reg/mem (value stream dstate)
86 (declare (type (or list reg) value)
88 (type sb!disassem:disassem-state dstate))
89 (if (typep value 'reg)
90 (print-reg value stream dstate)
91 (print-mem-access value stream nil dstate)))
93 ;; Same as print-reg/mem, but prints an explicit size indicator for
95 (defun print-sized-reg/mem (value stream dstate)
96 (declare (type (or list reg) value)
98 (type sb!disassem:disassem-state dstate))
99 (if (typep value 'reg)
100 (print-reg value stream dstate)
101 (print-mem-access value stream t dstate)))
103 (defun print-byte-reg/mem (value stream dstate)
104 (declare (type (or list reg) value)
106 (type sb!disassem:disassem-state dstate))
107 (if (typep value 'reg)
108 (print-byte-reg value stream dstate)
109 (print-mem-access value stream t dstate)))
111 (defun print-word-reg/mem (value stream dstate)
112 (declare (type (or list reg) value)
114 (type sb!disassem:disassem-state dstate))
115 (if (typep value 'reg)
116 (print-word-reg value stream dstate)
117 (print-mem-access value stream nil dstate)))
119 (defun print-label (value stream dstate)
120 (declare (ignore dstate))
121 (sb!disassem:princ16 value stream))
123 ;;; Returns either an integer, meaning a register, or a list of
124 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
125 ;;; may be missing or nil to indicate that it's not used or has the
126 ;;; obvious default value (e.g., 1 for the index-scale).
127 (defun prefilter-reg/mem (value dstate)
128 (declare (type list value)
129 (type sb!disassem:disassem-state dstate))
130 (let ((mod (car value))
132 (declare (type (unsigned-byte 2) mod)
133 (type (unsigned-byte 3) r/m))
139 (let ((sib (sb!disassem:read-suffix 8 dstate)))
140 (declare (type (unsigned-byte 8) sib))
141 (let ((base-reg (ldb (byte 3 0) sib))
142 (index-reg (ldb (byte 3 3) sib))
143 (index-scale (ldb (byte 2 6) sib)))
144 (declare (type (unsigned-byte 3) base-reg index-reg)
145 (type (unsigned-byte 2) index-scale))
149 (if (= base-reg #b101)
150 (sb!disassem:read-signed-suffix 32 dstate)
153 (sb!disassem:read-signed-suffix 8 dstate))
155 (sb!disassem:read-signed-suffix 32 dstate)))))
156 (list (if (and (= mod #b00) (= base-reg #b101)) nil base-reg)
158 (if (= index-reg #b100) nil index-reg)
159 (ash 1 index-scale))))))
160 ((and (= mod #b00) (= r/m #b101))
161 (list nil (sb!disassem:read-signed-suffix 32 dstate)) )
165 (list r/m (sb!disassem:read-signed-suffix 8 dstate)))
167 (list r/m (sb!disassem:read-signed-suffix 32 dstate))))))
170 ;;; This is a sort of bogus prefilter that just stores the info globally for
171 ;;; other people to use; it probably never gets printed.
172 (defun prefilter-width (value dstate)
173 (setf (sb!disassem:dstate-get-prop dstate 'width)
177 ;; set by a prefix instruction
178 (or (sb!disassem:dstate-get-prop dstate 'word-width)
179 +default-operand-size+)))
180 (when (not (eql word-width +default-operand-size+))
182 (setf (sb!disassem:dstate-get-prop dstate 'word-width)
183 +default-operand-size+))
186 (defun read-address (value dstate)
187 (declare (ignore value)) ; always nil anyway
188 (sb!disassem:read-suffix (width-bits *default-address-size*) dstate))
190 (defun width-bits (width)
200 ;;;; disassembler argument types
202 (sb!disassem:define-arg-type displacement
204 :use-label #'offset-next
205 :printer (lambda (value stream dstate)
206 (sb!disassem:maybe-note-assembler-routine value nil dstate)
207 (print-label value stream dstate)))
209 (sb!disassem:define-arg-type accum
210 :printer (lambda (value stream dstate)
211 (declare (ignore value)
213 (type sb!disassem:disassem-state dstate))
214 (print-reg 0 stream dstate)))
216 (sb!disassem:define-arg-type word-accum
217 :printer (lambda (value stream dstate)
218 (declare (ignore value)
220 (type sb!disassem:disassem-state dstate))
221 (print-word-reg 0 stream dstate)))
223 (sb!disassem:define-arg-type reg
224 :printer #'print-reg)
226 (sb!disassem:define-arg-type addr-reg
227 :printer #'print-addr-reg)
229 (sb!disassem:define-arg-type word-reg
230 :printer #'print-word-reg)
232 (sb!disassem:define-arg-type imm-addr
233 :prefilter #'read-address
234 :printer #'print-label)
236 (sb!disassem:define-arg-type imm-data
237 :prefilter (lambda (value dstate)
238 (declare (ignore value)) ; always nil anyway
239 (sb!disassem:read-suffix
240 (width-bits (sb!disassem:dstate-get-prop dstate 'width))
243 (sb!disassem:define-arg-type signed-imm-data
244 :prefilter (lambda (value dstate)
245 (declare (ignore value)) ; always nil anyway
246 (let ((width (sb!disassem:dstate-get-prop dstate 'width)))
247 (sb!disassem:read-signed-suffix (width-bits width) dstate))))
249 (sb!disassem:define-arg-type signed-imm-byte
250 :prefilter (lambda (value dstate)
251 (declare (ignore value)) ; always nil anyway
252 (sb!disassem:read-signed-suffix 8 dstate)))
254 (sb!disassem:define-arg-type signed-imm-dword
255 :prefilter (lambda (value dstate)
256 (declare (ignore value)) ; always nil anyway
257 (sb!disassem:read-signed-suffix 32 dstate)))
259 (sb!disassem:define-arg-type imm-word
260 :prefilter (lambda (value dstate)
261 (declare (ignore value)) ; always nil anyway
263 (or (sb!disassem:dstate-get-prop dstate 'word-width)
264 +default-operand-size+)))
265 (sb!disassem:read-suffix (width-bits width) dstate))))
267 (sb!disassem:define-arg-type signed-imm-word
268 :prefilter (lambda (value dstate)
269 (declare (ignore value)) ; always nil anyway
271 (or (sb!disassem:dstate-get-prop dstate 'word-width)
272 +default-operand-size+)))
273 (sb!disassem:read-signed-suffix (width-bits width) dstate))))
275 ;;; needed for the ret imm16 instruction
276 (sb!disassem:define-arg-type imm-word-16
277 :prefilter (lambda (value dstate)
278 (declare (ignore value)) ; always nil anyway
279 (sb!disassem:read-suffix 16 dstate)))
281 (sb!disassem:define-arg-type reg/mem
282 :prefilter #'prefilter-reg/mem
283 :printer #'print-reg/mem)
284 (sb!disassem:define-arg-type sized-reg/mem
285 ;; Same as reg/mem, but prints an explicit size indicator for
286 ;; memory references.
287 :prefilter #'prefilter-reg/mem
288 :printer #'print-sized-reg/mem)
289 (sb!disassem:define-arg-type byte-reg/mem
290 :prefilter #'prefilter-reg/mem
291 :printer #'print-byte-reg/mem)
292 (sb!disassem:define-arg-type word-reg/mem
293 :prefilter #'prefilter-reg/mem
294 :printer #'print-word-reg/mem)
297 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
298 (defun print-fp-reg (value stream dstate)
299 (declare (ignore dstate))
300 (format stream "FR~D" value))
301 (defun prefilter-fp-reg (value dstate)
303 (declare (ignore dstate))
306 (sb!disassem:define-arg-type fp-reg
307 :prefilter #'prefilter-fp-reg
308 :printer #'print-fp-reg)
310 (sb!disassem:define-arg-type width
311 :prefilter #'prefilter-width
312 :printer (lambda (value stream dstate)
315 (and (numberp value) (zerop value))) ; zzz jrd
318 ;; set by a prefix instruction
319 (or (sb!disassem:dstate-get-prop dstate 'word-width)
320 +default-operand-size+)))
321 (princ (schar (symbol-name word-width) 0) stream)))))
323 (eval-when (:compile-toplevel :load-toplevel :execute)
324 (defparameter *conditions*
327 (:b . 2) (:nae . 2) (:c . 2)
328 (:nb . 3) (:ae . 3) (:nc . 3)
329 (:eq . 4) (:e . 4) (:z . 4)
336 (:np . 11) (:po . 11)
337 (:l . 12) (:nge . 12)
338 (:nl . 13) (:ge . 13)
339 (:le . 14) (:ng . 14)
340 (:nle . 15) (:g . 15)))
341 (defparameter *condition-name-vec*
342 (let ((vec (make-array 16 :initial-element nil)))
343 (dolist (cond *conditions*)
344 (when (null (aref vec (cdr cond)))
345 (setf (aref vec (cdr cond)) (car cond))))
349 ;;; Set assembler parameters. (In CMU CL, this was done with
350 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
351 (eval-when (:compile-toplevel :load-toplevel :execute)
352 (setf sb!assem:*assem-scheduler-p* nil))
354 (sb!disassem:define-arg-type condition-code
355 :printer *condition-name-vec*)
357 (defun conditional-opcode (condition)
358 (cdr (assoc condition *conditions* :test #'eq)))
360 ;;;; disassembler instruction formats
362 (eval-when (:compile-toplevel :execute)
363 (defun swap-if (direction field1 separator field2)
364 `(:if (,direction :constant 0)
365 (,field1 ,separator ,field2)
366 (,field2 ,separator ,field1))))
368 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
369 (op :field (byte 8 0))
374 (sb!disassem:define-instruction-format (simple 8)
375 (op :field (byte 7 1))
376 (width :field (byte 1 0) :type 'width)
381 (sb!disassem:define-instruction-format (two-bytes 16
382 :default-printer '(:name))
383 (op :fields (list (byte 8 0) (byte 8 8))))
385 ;;; Same as simple, but with direction bit
386 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
387 (op :field (byte 6 2))
388 (dir :field (byte 1 1)))
390 ;;; Same as simple, but with the immediate value occurring by default,
391 ;;; and with an appropiate printer.
392 (sb!disassem:define-instruction-format (accum-imm 8
394 :default-printer '(:name
395 :tab accum ", " imm))
396 (imm :type 'imm-data))
398 (sb!disassem:define-instruction-format (reg-no-width 8
399 :default-printer '(:name :tab reg))
400 (op :field (byte 5 3))
401 (reg :field (byte 3 0) :type 'word-reg)
403 (accum :type 'word-accum)
406 ;;; adds a width field to reg-no-width
407 (sb!disassem:define-instruction-format (reg 8
408 :default-printer '(:name :tab reg))
409 (op :field (byte 4 4))
410 (width :field (byte 1 3) :type 'width)
411 (reg :field (byte 3 0) :type 'reg)
417 ;;; Same as reg, but with direction bit
418 (sb!disassem:define-instruction-format (reg-dir 8 :include 'reg)
419 (op :field (byte 3 5))
420 (dir :field (byte 1 4)))
422 (sb!disassem:define-instruction-format (two-bytes 16
423 :default-printer '(:name))
424 (op :fields (list (byte 8 0) (byte 8 8))))
426 (sb!disassem:define-instruction-format (reg-reg/mem 16
428 `(:name :tab reg ", " reg/mem))
429 (op :field (byte 7 1))
430 (width :field (byte 1 0) :type 'width)
431 (reg/mem :fields (list (byte 2 14) (byte 3 8))
433 (reg :field (byte 3 11) :type 'reg)
437 ;;; same as reg-reg/mem, but with direction bit
438 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
439 :include 'reg-reg/mem
443 ,(swap-if 'dir 'reg/mem ", " 'reg)))
444 (op :field (byte 6 2))
445 (dir :field (byte 1 1)))
447 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
448 (sb!disassem:define-instruction-format (reg/mem 16
449 :default-printer '(:name :tab reg/mem))
450 (op :fields (list (byte 7 1) (byte 3 11)))
451 (width :field (byte 1 0) :type 'width)
452 (reg/mem :fields (list (byte 2 14) (byte 3 8))
453 :type 'sized-reg/mem)
457 ;;; Same as reg/mem, but with the immediate value occurring by default,
458 ;;; and with an appropiate printer.
459 (sb!disassem:define-instruction-format (reg/mem-imm 16
462 '(:name :tab reg/mem ", " imm))
463 (reg/mem :type 'sized-reg/mem)
464 (imm :type 'imm-data))
466 ;;; Same as reg/mem, but with using the accumulator in the default printer
467 (sb!disassem:define-instruction-format
469 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
470 (reg/mem :type 'reg/mem) ; don't need a size
471 (accum :type 'accum))
473 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
474 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
476 `(:name :tab reg ", " reg/mem))
477 (prefix :field (byte 8 0) :value #b00001111)
478 (op :field (byte 7 9))
479 (width :field (byte 1 8) :type 'width)
480 (reg/mem :fields (list (byte 2 22) (byte 3 16))
482 (reg :field (byte 3 19) :type 'reg)
486 ;;; Same as reg/mem, but with a prefix of #b00001111
487 (sb!disassem:define-instruction-format (ext-reg/mem 24
488 :default-printer '(:name :tab reg/mem))
489 (prefix :field (byte 8 0) :value #b00001111)
490 (op :fields (list (byte 7 9) (byte 3 19)))
491 (width :field (byte 1 8) :type 'width)
492 (reg/mem :fields (list (byte 2 22) (byte 3 16))
493 :type 'sized-reg/mem)
497 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
498 :include 'ext-reg/mem
500 '(:name :tab reg/mem ", " imm))
501 (imm :type 'imm-data))
503 ;;;; This section was added by jrd, for fp instructions.
505 ;;; regular fp inst to/from registers/memory
506 (sb!disassem:define-instruction-format (floating-point 16
508 `(:name :tab reg/mem))
509 (prefix :field (byte 5 3) :value #b11011)
510 (op :fields (list (byte 3 0) (byte 3 11)))
511 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
513 ;;; fp insn to/from fp reg
514 (sb!disassem:define-instruction-format (floating-point-fp 16
515 :default-printer `(:name :tab fp-reg))
516 (prefix :field (byte 5 3) :value #b11011)
517 (suffix :field (byte 2 14) :value #b11)
518 (op :fields (list (byte 3 0) (byte 3 11)))
519 (fp-reg :field (byte 3 8) :type 'fp-reg))
521 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
522 (sb!disassem:define-instruction-format
523 (floating-point-fp-d 16
524 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
525 (prefix :field (byte 5 3) :value #b11011)
526 (suffix :field (byte 2 14) :value #b11)
527 (op :fields (list (byte 2 0) (byte 3 11)))
528 (d :field (byte 1 2))
529 (fp-reg :field (byte 3 8) :type 'fp-reg))
532 ;;; (added by (?) pfw)
533 ;;; fp no operand isns
534 (sb!disassem:define-instruction-format (floating-point-no 16
535 :default-printer '(:name))
536 (prefix :field (byte 8 0) :value #b11011001)
537 (suffix :field (byte 3 13) :value #b111)
538 (op :field (byte 5 8)))
540 (sb!disassem:define-instruction-format (floating-point-3 16
541 :default-printer '(:name))
542 (prefix :field (byte 5 3) :value #b11011)
543 (suffix :field (byte 2 14) :value #b11)
544 (op :fields (list (byte 3 0) (byte 6 8))))
546 (sb!disassem:define-instruction-format (floating-point-5 16
547 :default-printer '(:name))
548 (prefix :field (byte 8 0) :value #b11011011)
549 (suffix :field (byte 3 13) :value #b111)
550 (op :field (byte 5 8)))
552 (sb!disassem:define-instruction-format (floating-point-st 16
553 :default-printer '(:name))
554 (prefix :field (byte 8 0) :value #b11011111)
555 (suffix :field (byte 3 13) :value #b111)
556 (op :field (byte 5 8)))
558 (sb!disassem:define-instruction-format (string-op 8
560 :default-printer '(:name width)))
562 (sb!disassem:define-instruction-format (short-cond-jump 16)
563 (op :field (byte 4 4))
564 (cc :field (byte 4 0) :type 'condition-code)
565 (label :field (byte 8 8) :type 'displacement))
567 (sb!disassem:define-instruction-format (short-jump 16
568 :default-printer '(:name :tab label))
569 (const :field (byte 4 4) :value #b1110)
570 (op :field (byte 4 0))
571 (label :field (byte 8 8) :type 'displacement))
573 (sb!disassem:define-instruction-format (near-cond-jump 16)
574 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
575 (cc :field (byte 4 8) :type 'condition-code)
576 ;; The disassembler currently doesn't let you have an instruction > 32 bits
577 ;; long, so we fake it by using a prefilter to read the offset.
578 (label :type 'displacement
579 :prefilter (lambda (value dstate)
580 (declare (ignore value)) ; always nil anyway
581 (sb!disassem:read-signed-suffix 32 dstate))))
583 (sb!disassem:define-instruction-format (near-jump 8
584 :default-printer '(:name :tab label))
585 (op :field (byte 8 0))
586 ;; The disassembler currently doesn't let you have an instruction > 32 bits
587 ;; long, so we fake it by using a prefilter to read the address.
588 (label :type 'displacement
589 :prefilter (lambda (value dstate)
590 (declare (ignore value)) ; always nil anyway
591 (sb!disassem:read-signed-suffix 32 dstate))))
594 (sb!disassem:define-instruction-format (cond-set 24
595 :default-printer '('set cc :tab reg/mem))
596 (prefix :field (byte 8 0) :value #b00001111)
597 (op :field (byte 4 12) :value #b1001)
598 (cc :field (byte 4 8) :type 'condition-code)
599 (reg/mem :fields (list (byte 2 22) (byte 3 16))
601 (reg :field (byte 3 19) :value #b000))
603 (sb!disassem:define-instruction-format (cond-move 24
605 '('cmov cc :tab reg ", " reg/mem))
606 (prefix :field (byte 8 0) :value #b00001111)
607 (op :field (byte 4 12) :value #b0100)
608 (cc :field (byte 4 8) :type 'condition-code)
609 (reg/mem :fields (list (byte 2 22) (byte 3 16))
611 (reg :field (byte 3 19) :type 'reg))
613 (sb!disassem:define-instruction-format (enter-format 32
614 :default-printer '(:name
616 (:unless (:constant 0)
618 (op :field (byte 8 0))
619 (disp :field (byte 16 8))
620 (level :field (byte 8 24)))
622 (sb!disassem:define-instruction-format (prefetch 24
624 '(:name ", " reg/mem))
625 (prefix :field (byte 8 0) :value #b00001111)
626 (op :field (byte 8 8) :value #b00011000)
627 (reg/mem :fields (list (byte 2 22) (byte 3 16)) :type 'byte-reg/mem)
628 (reg :field (byte 3 19) :type 'reg))
630 ;;; Single byte instruction with an immediate byte argument.
631 (sb!disassem:define-instruction-format (byte-imm 16
632 :default-printer '(:name :tab code))
633 (op :field (byte 8 0))
634 (code :field (byte 8 8)))
636 ;;; Two byte instruction with an immediate byte argument.
638 (sb!disassem:define-instruction-format (word-imm 24
639 :default-printer '(:name :tab code))
640 (op :field (byte 16 0))
641 (code :field (byte 8 16)))
644 ;;;; primitive emitters
646 (define-bitfield-emitter emit-word 16
649 (define-bitfield-emitter emit-dword 32
652 (define-bitfield-emitter emit-byte-with-reg 8
653 (byte 5 3) (byte 3 0))
655 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
656 (byte 2 6) (byte 3 3) (byte 3 0))
658 (define-bitfield-emitter emit-sib-byte 8
659 (byte 2 6) (byte 3 3) (byte 3 0))
663 (defun emit-absolute-fixup (segment fixup)
664 (note-fixup segment :absolute fixup)
665 (let ((offset (fixup-offset fixup)))
667 (emit-back-patch segment
668 4 ; FIXME: n-word-bytes
669 (lambda (segment posn)
670 (declare (ignore posn))
672 (- (+ (component-header-length)
673 (or (label-position offset)
675 other-pointer-lowtag))))
676 (emit-dword segment (or offset 0)))))
678 (defun emit-relative-fixup (segment fixup)
679 (note-fixup segment :relative fixup)
680 (emit-dword segment (or (fixup-offset fixup) 0)))
682 ;;;; the effective-address (ea) structure
684 (defun reg-tn-encoding (tn)
685 (declare (type tn tn))
686 (aver (eq (sb-name (sc-sb (tn-sc tn))) 'registers))
687 (let ((offset (tn-offset tn)))
688 (logior (ash (logand offset 1) 2)
691 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
693 (size nil :type (member :byte :word :dword))
694 (base nil :type (or tn null))
695 (index nil :type (or tn null))
696 (scale 1 :type (member 1 2 4 8))
697 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
698 (def!method print-object ((ea ea) stream)
699 (cond ((or *print-escape* *print-readably*)
700 (print-unreadable-object (ea stream :type t)
702 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
706 (let ((scale (ea-scale ea)))
707 (if (= scale 1) nil scale))
710 (format stream "~A PTR [" (symbol-name (ea-size ea)))
712 (write-string (sb!c::location-print-name (ea-base ea)) stream)
714 (write-string "+" stream)))
716 (write-string (sb!c::location-print-name (ea-index ea)) stream))
717 (unless (= (ea-scale ea) 1)
718 (format stream "*~A" (ea-scale ea)))
719 (typecase (ea-disp ea)
722 (format stream "~@D" (ea-disp ea)))
724 (format stream "+~A" (ea-disp ea))))
725 (write-char #\] stream))))
727 (defun emit-ea (segment thing reg &optional allow-constants)
730 (ecase (sb-name (sc-sb (tn-sc thing)))
732 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
734 ;; Convert stack tns into an index off of EBP.
735 (let ((disp (frame-byte-offset (tn-offset thing))))
736 (cond ((<= -128 disp 127)
737 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
738 (emit-byte segment disp))
740 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
741 (emit-dword segment disp)))))
743 (unless allow-constants
745 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
746 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
747 (emit-absolute-fixup segment
750 (- (* (tn-offset thing) n-word-bytes)
751 other-pointer-lowtag))))))
753 (let* ((base (ea-base thing))
754 (index (ea-index thing))
755 (scale (ea-scale thing))
756 (disp (ea-disp thing))
757 (mod (cond ((or (null base)
759 (not (= (reg-tn-encoding base) #b101))))
761 ((and (fixnump disp) (<= -128 disp 127))
765 (r/m (cond (index #b100)
767 (t (reg-tn-encoding base)))))
768 (emit-mod-reg-r/m-byte segment mod reg r/m)
770 (let ((ss (1- (integer-length scale)))
771 (index (if (null index)
773 (let ((index (reg-tn-encoding index)))
775 (error "can't index off of ESP")
777 (base (if (null base)
779 (reg-tn-encoding base))))
780 (emit-sib-byte segment ss index base)))
782 (emit-byte segment disp))
783 ((or (= mod #b10) (null base))
785 (emit-absolute-fixup segment disp)
786 (emit-dword segment disp))))))
788 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
789 (emit-absolute-fixup segment thing))))
791 (defun fp-reg-tn-p (thing)
793 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
795 ;;; like the above, but for fp-instructions--jrd
796 (defun emit-fp-op (segment thing op)
797 (if (fp-reg-tn-p thing)
798 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
801 (emit-ea segment thing op)))
803 (defun byte-reg-p (thing)
805 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
806 (member (sc-name (tn-sc thing)) *byte-sc-names*)
809 (defun byte-ea-p (thing)
811 (ea (eq (ea-size thing) :byte))
813 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
816 (defun word-reg-p (thing)
818 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
819 (member (sc-name (tn-sc thing)) *word-sc-names*)
822 (defun word-ea-p (thing)
824 (ea (eq (ea-size thing) :word))
825 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
828 (defun dword-reg-p (thing)
830 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
831 (member (sc-name (tn-sc thing)) *dword-sc-names*)
834 (defun dword-ea-p (thing)
836 (ea (eq (ea-size thing) :dword))
838 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
841 (defun register-p (thing)
843 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
845 (defun accumulator-p (thing)
846 (and (register-p thing)
847 (= (tn-offset thing) 0)))
851 (def!constant +operand-size-prefix-byte+ #b01100110)
853 (defun maybe-emit-operand-size-prefix (segment size)
854 (unless (or (eq size :byte) (eq size +default-operand-size+))
855 (emit-byte segment +operand-size-prefix-byte+)))
857 (defun operand-size (thing)
860 ;; FIXME: might as well be COND instead of having to use #. readmacro
861 ;; to hack up the code
862 (case (sc-name (tn-sc thing))
869 ;; added by jrd: float-registers is a separate size (?)
875 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
881 (defun matching-operand-size (dst src)
882 (let ((dst-size (operand-size dst))
883 (src-size (operand-size src)))
886 (if (eq dst-size src-size)
888 (error "size mismatch: ~S is a ~S and ~S is a ~S."
889 dst dst-size src src-size))
893 (error "can't tell the size of either ~S or ~S" dst src)))))
895 (defun emit-sized-immediate (segment size value)
898 (emit-byte segment value))
900 (emit-word segment value))
902 (emit-dword segment value))))
904 (defun toggle-word-width (chunk inst stream dstate)
905 (declare (ignore chunk inst stream))
906 (let ((word-width (or (sb!disassem:dstate-get-prop dstate 'word-width)
907 +default-operand-size+)))
908 (setf (sb!disassem:dstate-get-prop dstate 'word-width)
913 ;;; This is a "prefix" instruction, which means that it modifies the
914 ;;; following instruction in some way without having an actual
915 ;;; mnemonic of its own.
916 (define-instruction operand-size-prefix (segment)
917 (:printer byte ((op +operand-size-prefix-byte+))
918 nil ; don't actually print it
919 :control #'toggle-word-width))
921 ;;;; general data transfer
923 (define-instruction mov (segment dst src &optional prefix)
924 ;; immediate to register
925 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
926 '(:name :tab reg ", " imm))
927 ;; absolute mem to/from accumulator
928 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
929 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
930 ;; register to/from register/memory
931 (:printer reg-reg/mem-dir ((op #b100010)))
932 ;; immediate to register/memory
933 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
936 (emit-prefix segment prefix)
937 (let ((size (matching-operand-size dst src)))
938 (maybe-emit-operand-size-prefix segment size)
939 (cond ((register-p dst)
940 (cond ((integerp src)
941 (emit-byte-with-reg segment
945 (reg-tn-encoding dst))
946 (emit-sized-immediate segment size src))
947 ((and (fixup-p src) (accumulator-p dst))
952 (emit-absolute-fixup segment src))
958 (emit-ea segment src (reg-tn-encoding dst) t))))
959 ((and (fixup-p dst) (accumulator-p src))
960 (emit-byte segment (if (eq size :byte) #b10100010 #b10100011))
961 (emit-absolute-fixup segment dst))
963 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
964 (emit-ea segment dst #b000)
965 (emit-sized-immediate segment size src))
967 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
968 (emit-ea segment dst (reg-tn-encoding src)))
970 (aver (eq size :dword))
971 (emit-byte segment #b11000111)
972 (emit-ea segment dst #b000)
973 (emit-absolute-fixup segment src))
975 (error "bogus arguments to MOV: ~S ~S" dst src))))))
977 (defun emit-move-with-extension (segment dst src opcode)
978 (aver (register-p dst))
979 (let ((dst-size (operand-size dst))
980 (src-size (operand-size src)))
983 (aver (eq src-size :byte))
984 (maybe-emit-operand-size-prefix segment :word)
985 (emit-byte segment #b00001111)
986 (emit-byte segment opcode)
987 (emit-ea segment src (reg-tn-encoding dst)))
991 (maybe-emit-operand-size-prefix segment :dword)
992 (emit-byte segment #b00001111)
993 (emit-byte segment opcode)
994 (emit-ea segment src (reg-tn-encoding dst)))
996 (emit-byte segment #b00001111)
997 (emit-byte segment (logior opcode 1))
998 (emit-ea segment src (reg-tn-encoding dst))))))))
1000 (define-instruction movsx (segment dst src)
1001 (:printer ext-reg-reg/mem ((op #b1011111) (reg nil :type 'word-reg)))
1002 (:emitter (emit-move-with-extension segment dst src #b10111110)))
1004 (define-instruction movzx (segment dst src)
1005 (:printer ext-reg-reg/mem ((op #b1011011) (reg nil :type 'word-reg)))
1006 (:emitter (emit-move-with-extension segment dst src #b10110110)))
1008 (define-instruction push (segment src &optional prefix)
1010 (:printer reg-no-width ((op #b01010)))
1012 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
1014 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1016 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
1018 ;; ### segment registers?
1021 (emit-prefix segment prefix)
1022 (cond ((integerp src)
1023 (cond ((<= -128 src 127)
1024 (emit-byte segment #b01101010)
1025 (emit-byte segment src))
1027 (emit-byte segment #b01101000)
1028 (emit-dword segment src))))
1030 ;; Interpret the fixup as an immediate dword to push.
1031 (emit-byte segment #b01101000)
1032 (emit-absolute-fixup segment src))
1034 (let ((size (operand-size src)))
1035 (aver (not (eq size :byte)))
1036 (maybe-emit-operand-size-prefix segment size)
1037 (cond ((register-p src)
1038 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1040 (emit-byte segment #b11111111)
1041 (emit-ea segment src #b110 t))))))))
1043 (define-instruction pusha (segment)
1044 (:printer byte ((op #b01100000)))
1046 (emit-byte segment #b01100000)))
1048 (define-instruction pop (segment dst)
1049 (:printer reg-no-width ((op #b01011)))
1050 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
1052 (let ((size (operand-size dst)))
1053 (aver (not (eq size :byte)))
1054 (maybe-emit-operand-size-prefix segment size)
1055 (cond ((register-p dst)
1056 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1058 (emit-byte segment #b10001111)
1059 (emit-ea segment dst #b000))))))
1061 (define-instruction popa (segment)
1062 (:printer byte ((op #b01100001)))
1064 (emit-byte segment #b01100001)))
1066 (define-instruction xchg (segment operand1 operand2)
1067 ;; Register with accumulator.
1068 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1069 ;; Register/Memory with Register.
1070 (:printer reg-reg/mem ((op #b1000011)))
1072 (let ((size (matching-operand-size operand1 operand2)))
1073 (maybe-emit-operand-size-prefix segment size)
1074 (labels ((xchg-acc-with-something (acc something)
1075 (if (and (not (eq size :byte)) (register-p something))
1076 (emit-byte-with-reg segment
1078 (reg-tn-encoding something))
1079 (xchg-reg-with-something acc something)))
1080 (xchg-reg-with-something (reg something)
1081 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1082 (emit-ea segment something (reg-tn-encoding reg))))
1083 (cond ((accumulator-p operand1)
1084 (xchg-acc-with-something operand1 operand2))
1085 ((accumulator-p operand2)
1086 (xchg-acc-with-something operand2 operand1))
1087 ((register-p operand1)
1088 (xchg-reg-with-something operand1 operand2))
1089 ((register-p operand2)
1090 (xchg-reg-with-something operand2 operand1))
1092 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1094 (define-instruction lea (segment dst src)
1095 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1097 (aver (dword-reg-p dst))
1098 (emit-byte segment #b10001101)
1099 (emit-ea segment src (reg-tn-encoding dst))))
1101 (define-instruction cmpxchg (segment dst src &optional prefix)
1102 ;; Register/Memory with Register.
1103 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1105 (aver (register-p src))
1106 (emit-prefix segment prefix)
1107 (let ((size (matching-operand-size src dst)))
1108 (maybe-emit-operand-size-prefix segment size)
1109 (emit-byte segment #b00001111)
1110 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1111 (emit-ea segment dst (reg-tn-encoding src)))))
1114 (defun emit-prefix (segment name)
1119 (emit-byte segment #xf0))
1121 (emit-byte segment #x64))
1123 (emit-byte segment #x65))))
1125 (define-instruction fs-segment-prefix (segment)
1126 (:printer byte ((op #b01100100)))
1128 (bug "FS emitted as a separate instruction!")))
1130 (define-instruction gs-segment-prefix (segment)
1131 (:printer byte ((op #b01100101)))
1133 (bug "GS emitted as a separate instruction!")))
1135 ;;;; flag control instructions
1137 ;;; CLC -- Clear Carry Flag.
1138 (define-instruction clc (segment)
1139 (:printer byte ((op #b11111000)))
1141 (emit-byte segment #b11111000)))
1143 ;;; CLD -- Clear Direction Flag.
1144 (define-instruction cld (segment)
1145 (:printer byte ((op #b11111100)))
1147 (emit-byte segment #b11111100)))
1149 ;;; CLI -- Clear Iterrupt Enable Flag.
1150 (define-instruction cli (segment)
1151 (:printer byte ((op #b11111010)))
1153 (emit-byte segment #b11111010)))
1155 ;;; CMC -- Complement Carry Flag.
1156 (define-instruction cmc (segment)
1157 (:printer byte ((op #b11110101)))
1159 (emit-byte segment #b11110101)))
1161 ;;; LAHF -- Load AH into flags.
1162 (define-instruction lahf (segment)
1163 (:printer byte ((op #b10011111)))
1165 (emit-byte segment #b10011111)))
1167 ;;; POPF -- Pop flags.
1168 (define-instruction popf (segment)
1169 (:printer byte ((op #b10011101)))
1171 (emit-byte segment #b10011101)))
1173 ;;; PUSHF -- push flags.
1174 (define-instruction pushf (segment)
1175 (:printer byte ((op #b10011100)))
1177 (emit-byte segment #b10011100)))
1179 ;;; SAHF -- Store AH into flags.
1180 (define-instruction sahf (segment)
1181 (:printer byte ((op #b10011110)))
1183 (emit-byte segment #b10011110)))
1185 ;;; STC -- Set Carry Flag.
1186 (define-instruction stc (segment)
1187 (:printer byte ((op #b11111001)))
1189 (emit-byte segment #b11111001)))
1191 ;;; STD -- Set Direction Flag.
1192 (define-instruction std (segment)
1193 (:printer byte ((op #b11111101)))
1195 (emit-byte segment #b11111101)))
1197 ;;; STI -- Set Interrupt Enable Flag.
1198 (define-instruction sti (segment)
1199 (:printer byte ((op #b11111011)))
1201 (emit-byte segment #b11111011)))
1205 (defun emit-random-arith-inst (name segment dst src opcode
1206 &optional allow-constants)
1207 (let ((size (matching-operand-size dst src)))
1208 (maybe-emit-operand-size-prefix segment size)
1211 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1212 (emit-byte segment #b10000011)
1213 (emit-ea segment dst opcode allow-constants)
1214 (emit-byte segment src))
1215 ((accumulator-p dst)
1222 (emit-sized-immediate segment size src))
1224 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1225 (emit-ea segment dst opcode allow-constants)
1226 (emit-sized-immediate segment size src))))
1231 (if (eq size :byte) #b00000000 #b00000001)))
1232 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1237 (if (eq size :byte) #b00000010 #b00000011)))
1238 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1240 (error "bogus operands to ~A" name)))))
1242 (eval-when (:compile-toplevel :execute)
1243 (defun arith-inst-printer-list (subop)
1244 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1245 (reg/mem-imm ((op (#b1000000 ,subop))))
1246 (reg/mem-imm ((op (#b1000001 ,subop))
1247 (imm nil :type signed-imm-byte)))
1248 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1251 (define-instruction add (segment dst src &optional prefix)
1252 (:printer-list (arith-inst-printer-list #b000))
1254 (emit-prefix segment prefix)
1255 (emit-random-arith-inst "ADD" segment dst src #b000)))
1257 (define-instruction adc (segment dst src)
1258 (:printer-list (arith-inst-printer-list #b010))
1259 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1261 (define-instruction sub (segment dst src &optional prefix)
1262 (:printer-list (arith-inst-printer-list #b101))
1264 (emit-prefix segment prefix)
1265 (emit-random-arith-inst "SUB" segment dst src #b101)))
1267 (define-instruction sbb (segment dst src)
1268 (:printer-list (arith-inst-printer-list #b011))
1269 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1271 (define-instruction cmp (segment dst src &optional prefix)
1272 (:printer-list (arith-inst-printer-list #b111))
1274 (emit-prefix segment prefix)
1275 (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1277 (define-instruction inc (segment dst)
1279 (:printer reg-no-width ((op #b01000)))
1281 (:printer reg/mem ((op '(#b1111111 #b000))))
1283 (let ((size (operand-size dst)))
1284 (maybe-emit-operand-size-prefix segment size)
1285 (cond ((and (not (eq size :byte)) (register-p dst))
1286 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1288 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1289 (emit-ea segment dst #b000))))))
1291 (define-instruction dec (segment dst)
1293 (:printer reg-no-width ((op #b01001)))
1295 (:printer reg/mem ((op '(#b1111111 #b001))))
1297 (let ((size (operand-size dst)))
1298 (maybe-emit-operand-size-prefix segment size)
1299 (cond ((and (not (eq size :byte)) (register-p dst))
1300 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1302 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1303 (emit-ea segment dst #b001))))))
1305 (define-instruction neg (segment dst)
1306 (:printer reg/mem ((op '(#b1111011 #b011))))
1308 (let ((size (operand-size dst)))
1309 (maybe-emit-operand-size-prefix segment size)
1310 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1311 (emit-ea segment dst #b011))))
1313 (define-instruction aaa (segment)
1314 (:printer byte ((op #b00110111)))
1316 (emit-byte segment #b00110111)))
1318 (define-instruction aas (segment)
1319 (:printer byte ((op #b00111111)))
1321 (emit-byte segment #b00111111)))
1323 (define-instruction daa (segment)
1324 (:printer byte ((op #b00100111)))
1326 (emit-byte segment #b00100111)))
1328 (define-instruction das (segment)
1329 (:printer byte ((op #b00101111)))
1331 (emit-byte segment #b00101111)))
1333 (define-instruction mul (segment dst src)
1334 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1336 (let ((size (matching-operand-size dst src)))
1337 (aver (accumulator-p dst))
1338 (maybe-emit-operand-size-prefix segment size)
1339 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1340 (emit-ea segment src #b100))))
1342 (define-instruction imul (segment dst &optional src1 src2)
1343 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1344 (:printer ext-reg-reg/mem ((op #b1010111)))
1345 (:printer reg-reg/mem ((op #b0110100) (width 1)
1346 (imm nil :type 'signed-imm-word))
1347 '(:name :tab reg ", " reg/mem ", " imm))
1348 (:printer reg-reg/mem ((op #b0110101) (width 1)
1349 (imm nil :type 'signed-imm-byte))
1350 '(:name :tab reg ", " reg/mem ", " imm))
1352 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1353 (let* ((size (matching-operand-size reg r/m))
1354 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1355 (maybe-emit-operand-size-prefix segment size)
1356 (emit-byte segment (if sx #b01101011 #b01101001))
1357 (emit-ea segment r/m (reg-tn-encoding reg))
1359 (emit-byte segment immed)
1360 (emit-sized-immediate segment size immed)))))
1362 (r/m-with-immed-to-reg dst src1 src2))
1365 (r/m-with-immed-to-reg dst dst src1)
1366 (let ((size (matching-operand-size dst src1)))
1367 (maybe-emit-operand-size-prefix segment size)
1368 (emit-byte segment #b00001111)
1369 (emit-byte segment #b10101111)
1370 (emit-ea segment src1 (reg-tn-encoding dst)))))
1372 (let ((size (operand-size dst)))
1373 (maybe-emit-operand-size-prefix segment size)
1374 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1375 (emit-ea segment dst #b101)))))))
1377 (define-instruction div (segment dst src)
1378 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1380 (let ((size (matching-operand-size dst src)))
1381 (aver (accumulator-p dst))
1382 (maybe-emit-operand-size-prefix segment size)
1383 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1384 (emit-ea segment src #b110))))
1386 (define-instruction idiv (segment dst src)
1387 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1389 (let ((size (matching-operand-size dst src)))
1390 (aver (accumulator-p dst))
1391 (maybe-emit-operand-size-prefix segment size)
1392 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1393 (emit-ea segment src #b111))))
1395 (define-instruction aad (segment)
1396 (:printer two-bytes ((op '(#b11010101 #b00001010))))
1398 (emit-byte segment #b11010101)
1399 (emit-byte segment #b00001010)))
1401 (define-instruction aam (segment)
1402 (:printer two-bytes ((op '(#b11010100 #b00001010))))
1404 (emit-byte segment #b11010100)
1405 (emit-byte segment #b00001010)))
1407 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1408 (define-instruction cbw (segment)
1410 (maybe-emit-operand-size-prefix segment :word)
1411 (emit-byte segment #b10011000)))
1413 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1414 (define-instruction cwde (segment)
1416 (maybe-emit-operand-size-prefix segment :dword)
1417 (emit-byte segment #b10011000)))
1419 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1420 (define-instruction cwd (segment)
1422 (maybe-emit-operand-size-prefix segment :word)
1423 (emit-byte segment #b10011001)))
1425 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1426 (define-instruction cdq (segment)
1427 (:printer byte ((op #b10011001)))
1429 (maybe-emit-operand-size-prefix segment :dword)
1430 (emit-byte segment #b10011001)))
1432 (define-instruction xadd (segment dst src &optional prefix)
1433 ;; Register/Memory with Register.
1434 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1436 (aver (register-p src))
1437 (emit-prefix segment prefix)
1438 (let ((size (matching-operand-size src dst)))
1439 (maybe-emit-operand-size-prefix segment size)
1440 (emit-byte segment #b00001111)
1441 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1442 (emit-ea segment dst (reg-tn-encoding src)))))
1447 (defun emit-shift-inst (segment dst amount opcode)
1448 (let ((size (operand-size dst)))
1449 (maybe-emit-operand-size-prefix segment size)
1450 (multiple-value-bind (major-opcode immed)
1452 (:cl (values #b11010010 nil))
1453 (1 (values #b11010000 nil))
1454 (t (values #b11000000 t)))
1456 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1457 (emit-ea segment dst opcode)
1459 (emit-byte segment amount)))))
1461 (eval-when (:compile-toplevel :execute)
1462 (defun shift-inst-printer-list (subop)
1463 `((reg/mem ((op (#b1101000 ,subop)))
1464 (:name :tab reg/mem ", 1"))
1465 (reg/mem ((op (#b1101001 ,subop)))
1466 (:name :tab reg/mem ", " 'cl))
1467 (reg/mem-imm ((op (#b1100000 ,subop))
1468 (imm nil :type signed-imm-byte))))))
1470 (define-instruction rol (segment dst amount)
1472 (shift-inst-printer-list #b000))
1474 (emit-shift-inst segment dst amount #b000)))
1476 (define-instruction ror (segment dst amount)
1478 (shift-inst-printer-list #b001))
1480 (emit-shift-inst segment dst amount #b001)))
1482 (define-instruction rcl (segment dst amount)
1484 (shift-inst-printer-list #b010))
1486 (emit-shift-inst segment dst amount #b010)))
1488 (define-instruction rcr (segment dst amount)
1490 (shift-inst-printer-list #b011))
1492 (emit-shift-inst segment dst amount #b011)))
1494 (define-instruction shl (segment dst amount)
1496 (shift-inst-printer-list #b100))
1498 (emit-shift-inst segment dst amount #b100)))
1500 (define-instruction shr (segment dst amount)
1502 (shift-inst-printer-list #b101))
1504 (emit-shift-inst segment dst amount #b101)))
1506 (define-instruction sar (segment dst amount)
1508 (shift-inst-printer-list #b111))
1510 (emit-shift-inst segment dst amount #b111)))
1512 (defun emit-double-shift (segment opcode dst src amt)
1513 (let ((size (matching-operand-size dst src)))
1514 (when (eq size :byte)
1515 (error "Double shifts can only be used with words."))
1516 (maybe-emit-operand-size-prefix segment size)
1517 (emit-byte segment #b00001111)
1518 (emit-byte segment (dpb opcode (byte 1 3)
1519 (if (eq amt :cl) #b10100101 #b10100100)))
1521 (emit-ea segment dst src)
1522 (emit-ea segment dst (reg-tn-encoding src)) ; pw tries this
1523 (unless (eq amt :cl)
1524 (emit-byte segment amt))))
1526 (eval-when (:compile-toplevel :execute)
1527 (defun double-shift-inst-printer-list (op)
1529 (ext-reg-reg/mem-imm ((op ,(logior op #b10))
1530 (imm nil :type signed-imm-byte)))
1531 (ext-reg-reg/mem ((op ,(logior op #b10)))
1532 (:name :tab reg/mem ", " reg ", " 'cl)))))
1534 (define-instruction shld (segment dst src amt)
1535 (:declare (type (or (member :cl) (mod 32)) amt))
1536 (:printer-list (double-shift-inst-printer-list #b1010000))
1538 (emit-double-shift segment #b0 dst src amt)))
1540 (define-instruction shrd (segment dst src amt)
1541 (:declare (type (or (member :cl) (mod 32)) amt))
1542 (:printer-list (double-shift-inst-printer-list #b1010100))
1544 (emit-double-shift segment #b1 dst src amt)))
1546 (define-instruction and (segment dst src)
1548 (arith-inst-printer-list #b100))
1550 (emit-random-arith-inst "AND" segment dst src #b100)))
1552 (define-instruction test (segment this that)
1553 (:printer accum-imm ((op #b1010100)))
1554 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1555 (:printer reg-reg/mem ((op #b1000010)))
1557 (let ((size (matching-operand-size this that)))
1558 (maybe-emit-operand-size-prefix segment size)
1559 (flet ((test-immed-and-something (immed something)
1560 (cond ((accumulator-p something)
1562 (if (eq size :byte) #b10101000 #b10101001))
1563 (emit-sized-immediate segment size immed))
1566 (if (eq size :byte) #b11110110 #b11110111))
1567 (emit-ea segment something #b000)
1568 (emit-sized-immediate segment size immed))))
1569 (test-reg-and-something (reg something)
1570 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1571 (emit-ea segment something (reg-tn-encoding reg))))
1572 (cond ((integerp that)
1573 (test-immed-and-something that this))
1575 (test-immed-and-something this that))
1577 (test-reg-and-something this that))
1579 (test-reg-and-something that this))
1581 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1583 ;;; Emit the most compact form of the test immediate instruction,
1584 ;;; using an 8 bit test when the immediate is only 8 bits and the
1585 ;;; value is one of the four low registers (eax, ebx, ecx, edx) or the
1587 (defun emit-optimized-test-inst (x y)
1590 (let ((offset (tn-offset x)))
1591 (cond ((and (sc-is x any-reg descriptor-reg)
1592 (or (= offset eax-offset) (= offset ebx-offset)
1593 (= offset ecx-offset) (= offset edx-offset)))
1594 (inst test (make-random-tn :kind :normal
1595 :sc (sc-or-lose 'byte-reg)
1598 ((sc-is x control-stack)
1599 (inst test (make-ea :byte :base ebp-tn
1600 :disp (- (* (1+ offset) n-word-bytes)))
1607 (define-instruction or (segment dst src &optional prefix)
1609 (arith-inst-printer-list #b001))
1611 (emit-prefix segment prefix)
1612 (emit-random-arith-inst "OR" segment dst src #b001)))
1614 (define-instruction xor (segment dst src &optional prefix)
1616 (arith-inst-printer-list #b110))
1618 (emit-prefix segment prefix)
1619 (emit-random-arith-inst "XOR" segment dst src #b110)))
1621 (define-instruction not (segment dst)
1622 (:printer reg/mem ((op '(#b1111011 #b010))))
1624 (let ((size (operand-size dst)))
1625 (maybe-emit-operand-size-prefix segment size)
1626 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1627 (emit-ea segment dst #b010))))
1629 ;;;; string manipulation
1631 (define-instruction cmps (segment size)
1632 (:printer string-op ((op #b1010011)))
1634 (maybe-emit-operand-size-prefix segment size)
1635 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1637 (define-instruction ins (segment acc)
1638 (:printer string-op ((op #b0110110)))
1640 (let ((size (operand-size acc)))
1641 (aver (accumulator-p acc))
1642 (maybe-emit-operand-size-prefix segment size)
1643 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1645 (define-instruction lods (segment acc)
1646 (:printer string-op ((op #b1010110)))
1648 (let ((size (operand-size acc)))
1649 (aver (accumulator-p acc))
1650 (maybe-emit-operand-size-prefix segment size)
1651 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1653 (define-instruction movs (segment size)
1654 (:printer string-op ((op #b1010010)))
1656 (maybe-emit-operand-size-prefix segment size)
1657 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1659 (define-instruction outs (segment acc)
1660 (:printer string-op ((op #b0110111)))
1662 (let ((size (operand-size acc)))
1663 (aver (accumulator-p acc))
1664 (maybe-emit-operand-size-prefix segment size)
1665 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1667 (define-instruction scas (segment acc)
1668 (:printer string-op ((op #b1010111)))
1670 (let ((size (operand-size acc)))
1671 (aver (accumulator-p acc))
1672 (maybe-emit-operand-size-prefix segment size)
1673 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1675 (define-instruction stos (segment acc)
1676 (:printer string-op ((op #b1010101)))
1678 (let ((size (operand-size acc)))
1679 (aver (accumulator-p acc))
1680 (maybe-emit-operand-size-prefix segment size)
1681 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1683 (define-instruction xlat (segment)
1684 (:printer byte ((op #b11010111)))
1686 (emit-byte segment #b11010111)))
1688 (define-instruction rep (segment)
1690 (emit-byte segment #b11110010)))
1692 (define-instruction repe (segment)
1693 (:printer byte ((op #b11110011)))
1695 (emit-byte segment #b11110011)))
1697 (define-instruction repne (segment)
1698 (:printer byte ((op #b11110010)))
1700 (emit-byte segment #b11110010)))
1703 ;;;; bit manipulation
1705 (define-instruction bsf (segment dst src)
1706 (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
1708 (let ((size (matching-operand-size dst src)))
1709 (when (eq size :byte)
1710 (error "can't scan bytes: ~S" src))
1711 (maybe-emit-operand-size-prefix segment size)
1712 (emit-byte segment #b00001111)
1713 (emit-byte segment #b10111100)
1714 (emit-ea segment src (reg-tn-encoding dst)))))
1716 (define-instruction bsr (segment dst src)
1717 (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
1719 (let ((size (matching-operand-size dst src)))
1720 (when (eq size :byte)
1721 (error "can't scan bytes: ~S" src))
1722 (maybe-emit-operand-size-prefix segment size)
1723 (emit-byte segment #b00001111)
1724 (emit-byte segment #b10111101)
1725 (emit-ea segment src (reg-tn-encoding dst)))))
1727 (defun emit-bit-test-and-mumble (segment src index opcode)
1728 (let ((size (operand-size src)))
1729 (when (eq size :byte)
1730 (error "can't scan bytes: ~S" src))
1731 (maybe-emit-operand-size-prefix segment size)
1732 (emit-byte segment #b00001111)
1733 (cond ((integerp index)
1734 (emit-byte segment #b10111010)
1735 (emit-ea segment src opcode)
1736 (emit-byte segment index))
1738 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
1739 (emit-ea segment src (reg-tn-encoding index))))))
1741 (eval-when (:compile-toplevel :execute)
1742 (defun bit-test-inst-printer-list (subop)
1743 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
1744 (reg/mem nil :type word-reg/mem)
1745 (imm nil :type imm-data)
1747 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
1749 (:name :tab reg/mem ", " reg)))))
1751 (define-instruction bt (segment src index)
1752 (:printer-list (bit-test-inst-printer-list #b100))
1754 (emit-bit-test-and-mumble segment src index #b100)))
1756 (define-instruction btc (segment src index)
1757 (:printer-list (bit-test-inst-printer-list #b111))
1759 (emit-bit-test-and-mumble segment src index #b111)))
1761 (define-instruction btr (segment src index)
1762 (:printer-list (bit-test-inst-printer-list #b110))
1764 (emit-bit-test-and-mumble segment src index #b110)))
1766 (define-instruction bts (segment src index)
1767 (:printer-list (bit-test-inst-printer-list #b101))
1769 (emit-bit-test-and-mumble segment src index #b101)))
1772 ;;;; control transfer
1774 (define-instruction call (segment where)
1775 (:printer near-jump ((op #b11101000)))
1776 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
1780 (emit-byte segment #b11101000)
1781 (emit-back-patch segment
1783 (lambda (segment posn)
1785 (- (label-position where)
1788 (emit-byte segment #b11101000)
1789 (emit-relative-fixup segment where))
1791 (emit-byte segment #b11111111)
1792 (emit-ea segment where #b010)))))
1794 (defun emit-byte-displacement-backpatch (segment target)
1795 (emit-back-patch segment
1797 (lambda (segment posn)
1798 (let ((disp (- (label-position target) (1+ posn))))
1799 (aver (<= -128 disp 127))
1800 (emit-byte segment disp)))))
1802 (define-instruction jmp (segment cond &optional where)
1803 ;; conditional jumps
1804 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
1805 (:printer near-cond-jump () '('j cc :tab label))
1806 ;; unconditional jumps
1807 (:printer short-jump ((op #b1011)))
1808 (:printer near-jump ((op #b11101001)) )
1809 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
1814 (lambda (segment posn delta-if-after)
1815 (let ((disp (- (label-position where posn delta-if-after)
1817 (when (<= -128 disp 127)
1819 (dpb (conditional-opcode cond)
1822 (emit-byte-displacement-backpatch segment where)
1824 (lambda (segment posn)
1825 (let ((disp (- (label-position where) (+ posn 6))))
1826 (emit-byte segment #b00001111)
1828 (dpb (conditional-opcode cond)
1831 (emit-dword segment disp)))))
1832 ((label-p (setq where cond))
1835 (lambda (segment posn delta-if-after)
1836 (let ((disp (- (label-position where posn delta-if-after)
1838 (when (<= -128 disp 127)
1839 (emit-byte segment #b11101011)
1840 (emit-byte-displacement-backpatch segment where)
1842 (lambda (segment posn)
1843 (let ((disp (- (label-position where) (+ posn 5))))
1844 (emit-byte segment #b11101001)
1845 (emit-dword segment disp)))))
1847 (emit-byte segment #b11101001)
1848 (emit-relative-fixup segment where))
1850 (unless (or (ea-p where) (tn-p where))
1851 (error "don't know what to do with ~A" where))
1852 (emit-byte segment #b11111111)
1853 (emit-ea segment where #b100)))))
1855 (define-instruction jmp-short (segment label)
1857 (emit-byte segment #b11101011)
1858 (emit-byte-displacement-backpatch segment label)))
1860 (define-instruction ret (segment &optional stack-delta)
1861 (:printer byte ((op #b11000011)))
1862 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
1866 (emit-byte segment #b11000010)
1867 (emit-word segment stack-delta))
1869 (emit-byte segment #b11000011)))))
1871 (define-instruction jecxz (segment target)
1872 (:printer short-jump ((op #b0011)))
1874 (emit-byte segment #b11100011)
1875 (emit-byte-displacement-backpatch segment target)))
1877 (define-instruction loop (segment target)
1878 (:printer short-jump ((op #b0010)))
1880 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
1881 (emit-byte-displacement-backpatch segment target)))
1883 (define-instruction loopz (segment target)
1884 (:printer short-jump ((op #b0001)))
1886 (emit-byte segment #b11100001)
1887 (emit-byte-displacement-backpatch segment target)))
1889 (define-instruction loopnz (segment target)
1890 (:printer short-jump ((op #b0000)))
1892 (emit-byte segment #b11100000)
1893 (emit-byte-displacement-backpatch segment target)))
1895 ;;;; conditional move
1896 (define-instruction cmov (segment cond dst src)
1897 (:printer cond-move ())
1899 (aver (register-p dst))
1900 (let ((size (matching-operand-size dst src)))
1901 (aver (or (eq size :word) (eq size :dword)))
1902 (maybe-emit-operand-size-prefix segment size))
1903 (emit-byte segment #b00001111)
1904 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
1905 (emit-ea segment src (reg-tn-encoding dst))))
1907 ;;;; conditional byte set
1909 (define-instruction set (segment dst cond)
1910 (:printer cond-set ())
1912 (emit-byte segment #b00001111)
1913 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
1914 (emit-ea segment dst #b000)))
1918 (define-instruction enter (segment disp &optional (level 0))
1919 (:declare (type (unsigned-byte 16) disp)
1920 (type (unsigned-byte 8) level))
1921 (:printer enter-format ((op #b11001000)))
1923 (emit-byte segment #b11001000)
1924 (emit-word segment disp)
1925 (emit-byte segment level)))
1927 (define-instruction leave (segment)
1928 (:printer byte ((op #b11001001)))
1930 (emit-byte segment #b11001001)))
1933 (define-instruction prefetchnta (segment ea)
1934 (:printer prefetch ((op #b00011000) (reg #b000)))
1936 (aver (typep ea 'ea))
1937 (aver (eq :byte (ea-size ea)))
1938 (emit-byte segment #b00001111)
1939 (emit-byte segment #b00011000)
1940 (emit-ea segment ea #b000)))
1942 (define-instruction prefetcht0 (segment ea)
1943 (:printer prefetch ((op #b00011000) (reg #b001)))
1945 (aver (typep ea 'ea))
1946 (aver (eq :byte (ea-size ea)))
1947 (emit-byte segment #b00001111)
1948 (emit-byte segment #b00011000)
1949 (emit-ea segment ea #b001)))
1951 (define-instruction prefetcht1 (segment ea)
1952 (:printer prefetch ((op #b00011000) (reg #b010)))
1954 (aver (typep ea 'ea))
1955 (aver (eq :byte (ea-size ea)))
1956 (emit-byte segment #b00001111)
1957 (emit-byte segment #b00011000)
1958 (emit-ea segment ea #b010)))
1960 (define-instruction prefetcht2 (segment ea)
1961 (:printer prefetch ((op #b00011000) (reg #b011)))
1963 (aver (typep ea 'ea))
1964 (aver (eq :byte (ea-size ea)))
1965 (emit-byte segment #b00001111)
1966 (emit-byte segment #b00011000)
1967 (emit-ea segment ea #b011)))
1969 ;;;; interrupt instructions
1971 (defun snarf-error-junk (sap offset &optional length-only)
1972 (let* ((length (sb!sys:sap-ref-8 sap offset))
1973 (vector (make-array length :element-type '(unsigned-byte 8))))
1974 (declare (type sb!sys:system-area-pointer sap)
1975 (type (unsigned-byte 8) length)
1976 (type (simple-array (unsigned-byte 8) (*)) vector))
1978 (values 0 (1+ length) nil nil))
1980 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
1982 (collect ((sc-offsets)
1984 (lengths 1) ; the length byte
1986 (error-number (sb!c:read-var-integer vector index)))
1989 (when (>= index length)
1991 (let ((old-index index))
1992 (sc-offsets (sb!c:read-var-integer vector index))
1993 (lengths (- index old-index))))
1994 (values error-number
2000 (defmacro break-cases (breaknum &body cases)
2001 (let ((bn-temp (gensym)))
2002 (collect ((clauses))
2003 (dolist (case cases)
2004 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2005 `(let ((,bn-temp ,breaknum))
2006 (cond ,@(clauses))))))
2009 (defun break-control (chunk inst stream dstate)
2010 (declare (ignore inst))
2011 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2012 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2013 ;; map has it undefined; and it should be easier to look in the target
2014 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2015 ;; from first principles whether it's defined in some way that genesis
2017 (case #!-darwin (byte-imm-code chunk dstate)
2018 #!+darwin (word-imm-code chunk dstate)
2021 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2024 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2026 (nt "breakpoint trap"))
2027 (#.pending-interrupt-trap
2028 (nt "pending interrupt trap"))
2031 (#.fun-end-breakpoint-trap
2032 (nt "function end breakpoint trap")))))
2034 (define-instruction break (segment code)
2035 (:declare (type (unsigned-byte 8) code))
2036 #!-darwin (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2037 :control #'break-control)
2038 #!+darwin (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
2039 :control #'break-control)
2041 #!-darwin (emit-byte segment #b11001100)
2042 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2043 ;; throw a sigill with 0x0b0f instead and check for this in the
2044 ;; SIGILL handler and pass it on to the sigtrap handler if
2046 #!+darwin (emit-word segment #b0000101100001111)
2047 (emit-byte segment code)))
2049 (define-instruction int (segment number)
2050 (:declare (type (unsigned-byte 8) number))
2051 (:printer byte-imm ((op #b11001101)))
2055 (emit-byte segment #b11001100))
2057 (emit-byte segment #b11001101)
2058 (emit-byte segment number)))))
2060 (define-instruction into (segment)
2061 (:printer byte ((op #b11001110)))
2063 (emit-byte segment #b11001110)))
2065 (define-instruction bound (segment reg bounds)
2067 (let ((size (matching-operand-size reg bounds)))
2068 (when (eq size :byte)
2069 (error "can't bounds-test bytes: ~S" reg))
2070 (maybe-emit-operand-size-prefix segment size)
2071 (emit-byte segment #b01100010)
2072 (emit-ea segment bounds (reg-tn-encoding reg)))))
2074 (define-instruction iret (segment)
2075 (:printer byte ((op #b11001111)))
2077 (emit-byte segment #b11001111)))
2079 ;;;; processor control
2081 (define-instruction hlt (segment)
2082 (:printer byte ((op #b11110100)))
2084 (emit-byte segment #b11110100)))
2086 (define-instruction nop (segment)
2087 (:printer byte ((op #b10010000)))
2089 (emit-byte segment #b10010000)))
2091 (define-instruction wait (segment)
2092 (:printer byte ((op #b10011011)))
2094 (emit-byte segment #b10011011)))
2096 ;;; FIXME: It would be better to make the disassembler understand the prefix as part
2097 ;;; of the instructions...
2098 (define-instruction lock (segment)
2099 (:printer byte ((op #b11110000)))
2101 (bug "LOCK prefix used as a standalone instruction")))
2103 ;;;; miscellaneous hackery
2105 (define-instruction byte (segment byte)
2107 (emit-byte segment byte)))
2109 (define-instruction word (segment word)
2111 (emit-word segment word)))
2113 (define-instruction dword (segment dword)
2115 (emit-dword segment dword)))
2117 (defun emit-header-data (segment type)
2118 (emit-back-patch segment
2120 (lambda (segment posn)
2124 (component-header-length))
2128 (define-instruction simple-fun-header-word (segment)
2130 (emit-header-data segment simple-fun-header-widetag)))
2132 (define-instruction lra-header-word (segment)
2134 (emit-header-data segment return-pc-header-widetag)))
2136 ;;;; fp instructions
2138 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
2140 ;;;; Note: We treat the single-precision and double-precision variants
2141 ;;;; as separate instructions.
2143 ;;; Load single to st(0).
2144 (define-instruction fld (segment source)
2145 (:printer floating-point ((op '(#b001 #b000))))
2147 (emit-byte segment #b11011001)
2148 (emit-fp-op segment source #b000)))
2150 ;;; Load double to st(0).
2151 (define-instruction fldd (segment source)
2152 (:printer floating-point ((op '(#b101 #b000))))
2153 (:printer floating-point-fp ((op '(#b001 #b000))))
2155 (if (fp-reg-tn-p source)
2156 (emit-byte segment #b11011001)
2157 (emit-byte segment #b11011101))
2158 (emit-fp-op segment source #b000)))
2160 ;;; Load long to st(0).
2161 (define-instruction fldl (segment source)
2162 (:printer floating-point ((op '(#b011 #b101))))
2164 (emit-byte segment #b11011011)
2165 (emit-fp-op segment source #b101)))
2167 ;;; Store single from st(0).
2168 (define-instruction fst (segment dest)
2169 (:printer floating-point ((op '(#b001 #b010))))
2171 (cond ((fp-reg-tn-p dest)
2172 (emit-byte segment #b11011101)
2173 (emit-fp-op segment dest #b010))
2175 (emit-byte segment #b11011001)
2176 (emit-fp-op segment dest #b010)))))
2178 ;;; Store double from st(0).
2179 (define-instruction fstd (segment dest)
2180 (:printer floating-point ((op '(#b101 #b010))))
2181 (:printer floating-point-fp ((op '(#b101 #b010))))
2183 (cond ((fp-reg-tn-p dest)
2184 (emit-byte segment #b11011101)
2185 (emit-fp-op segment dest #b010))
2187 (emit-byte segment #b11011101)
2188 (emit-fp-op segment dest #b010)))))
2190 ;;; Arithmetic ops are all done with at least one operand at top of
2191 ;;; stack. The other operand is is another register or a 32/64 bit
2194 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2195 ;;; that these conflict with the Gdb conventions for binops. To reduce
2196 ;;; the confusion I've added comments showing the mathamatical
2197 ;;; operation and the two syntaxes. By the ASM386 convention the
2198 ;;; instruction syntax is:
2201 ;;; or Fop Destination, Source
2203 ;;; If only one operand is given then it is the source and the
2204 ;;; destination is ST(0). There are reversed forms of the fsub and
2205 ;;; fdiv instructions inducated by an 'R' suffix.
2207 ;;; The mathematical operation for the non-reverse form is always:
2208 ;;; destination = destination op source
2210 ;;; For the reversed form it is:
2211 ;;; destination = source op destination
2213 ;;; The instructions below only accept one operand at present which is
2214 ;;; usually the source. I've hack in extra instructions to implement
2215 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2216 ;;; the operand is the destination with the source being ST(0).
2219 ;;; st(0) = st(0) + memory or st(i).
2220 (define-instruction fadd (segment source)
2221 (:printer floating-point ((op '(#b000 #b000))))
2223 (emit-byte segment #b11011000)
2224 (emit-fp-op segment source #b000)))
2227 ;;; st(0) = st(0) + memory or st(i).
2228 (define-instruction faddd (segment source)
2229 (:printer floating-point ((op '(#b100 #b000))))
2230 (:printer floating-point-fp ((op '(#b000 #b000))))
2232 (if (fp-reg-tn-p source)
2233 (emit-byte segment #b11011000)
2234 (emit-byte segment #b11011100))
2235 (emit-fp-op segment source #b000)))
2237 ;;; Add double destination st(i):
2238 ;;; st(i) = st(0) + st(i).
2239 (define-instruction fadd-sti (segment destination)
2240 (:printer floating-point-fp ((op '(#b100 #b000))))
2242 (aver (fp-reg-tn-p destination))
2243 (emit-byte segment #b11011100)
2244 (emit-fp-op segment destination #b000)))
2246 (define-instruction faddp-sti (segment destination)
2247 (:printer floating-point-fp ((op '(#b110 #b000))))
2249 (aver (fp-reg-tn-p destination))
2250 (emit-byte segment #b11011110)
2251 (emit-fp-op segment destination #b000)))
2253 ;;; Subtract single:
2254 ;;; st(0) = st(0) - memory or st(i).
2255 (define-instruction fsub (segment source)
2256 (:printer floating-point ((op '(#b000 #b100))))
2258 (emit-byte segment #b11011000)
2259 (emit-fp-op segment source #b100)))
2261 ;;; Subtract single, reverse:
2262 ;;; st(0) = memory or st(i) - st(0).
2263 (define-instruction fsubr (segment source)
2264 (:printer floating-point ((op '(#b000 #b101))))
2266 (emit-byte segment #b11011000)
2267 (emit-fp-op segment source #b101)))
2269 ;;; Subtract double:
2270 ;;; st(0) = st(0) - memory or st(i).
2271 (define-instruction fsubd (segment source)
2272 (:printer floating-point ((op '(#b100 #b100))))
2273 (:printer floating-point-fp ((op '(#b000 #b100))))
2275 (if (fp-reg-tn-p source)
2276 (emit-byte segment #b11011000)
2277 (emit-byte segment #b11011100))
2278 (emit-fp-op segment source #b100)))
2280 ;;; Subtract double, reverse:
2281 ;;; st(0) = memory or st(i) - st(0).
2282 (define-instruction fsubrd (segment source)
2283 (:printer floating-point ((op '(#b100 #b101))))
2284 (:printer floating-point-fp ((op '(#b000 #b101))))
2286 (if (fp-reg-tn-p source)
2287 (emit-byte segment #b11011000)
2288 (emit-byte segment #b11011100))
2289 (emit-fp-op segment source #b101)))
2291 ;;; Subtract double, destination st(i):
2292 ;;; st(i) = st(i) - st(0).
2294 ;;; ASM386 syntax: FSUB ST(i), ST
2295 ;;; Gdb syntax: fsubr %st,%st(i)
2296 (define-instruction fsub-sti (segment destination)
2297 (:printer floating-point-fp ((op '(#b100 #b101))))
2299 (aver (fp-reg-tn-p destination))
2300 (emit-byte segment #b11011100)
2301 (emit-fp-op segment destination #b101)))
2303 (define-instruction fsubp-sti (segment destination)
2304 (:printer floating-point-fp ((op '(#b110 #b101))))
2306 (aver (fp-reg-tn-p destination))
2307 (emit-byte segment #b11011110)
2308 (emit-fp-op segment destination #b101)))
2310 ;;; Subtract double, reverse, destination st(i):
2311 ;;; st(i) = st(0) - st(i).
2313 ;;; ASM386 syntax: FSUBR ST(i), ST
2314 ;;; Gdb syntax: fsub %st,%st(i)
2315 (define-instruction fsubr-sti (segment destination)
2316 (:printer floating-point-fp ((op '(#b100 #b100))))
2318 (aver (fp-reg-tn-p destination))
2319 (emit-byte segment #b11011100)
2320 (emit-fp-op segment destination #b100)))
2322 (define-instruction fsubrp-sti (segment destination)
2323 (:printer floating-point-fp ((op '(#b110 #b100))))
2325 (aver (fp-reg-tn-p destination))
2326 (emit-byte segment #b11011110)
2327 (emit-fp-op segment destination #b100)))
2329 ;;; Multiply single:
2330 ;;; st(0) = st(0) * memory or st(i).
2331 (define-instruction fmul (segment source)
2332 (:printer floating-point ((op '(#b000 #b001))))
2334 (emit-byte segment #b11011000)
2335 (emit-fp-op segment source #b001)))
2337 ;;; Multiply double:
2338 ;;; st(0) = st(0) * memory or st(i).
2339 (define-instruction fmuld (segment source)
2340 (:printer floating-point ((op '(#b100 #b001))))
2341 (:printer floating-point-fp ((op '(#b000 #b001))))
2343 (if (fp-reg-tn-p source)
2344 (emit-byte segment #b11011000)
2345 (emit-byte segment #b11011100))
2346 (emit-fp-op segment source #b001)))
2348 ;;; Multiply double, destination st(i):
2349 ;;; st(i) = st(i) * st(0).
2350 (define-instruction fmul-sti (segment destination)
2351 (:printer floating-point-fp ((op '(#b100 #b001))))
2353 (aver (fp-reg-tn-p destination))
2354 (emit-byte segment #b11011100)
2355 (emit-fp-op segment destination #b001)))
2358 ;;; st(0) = st(0) / memory or st(i).
2359 (define-instruction fdiv (segment source)
2360 (:printer floating-point ((op '(#b000 #b110))))
2362 (emit-byte segment #b11011000)
2363 (emit-fp-op segment source #b110)))
2365 ;;; Divide single, reverse:
2366 ;;; st(0) = memory or st(i) / st(0).
2367 (define-instruction fdivr (segment source)
2368 (:printer floating-point ((op '(#b000 #b111))))
2370 (emit-byte segment #b11011000)
2371 (emit-fp-op segment source #b111)))
2374 ;;; st(0) = st(0) / memory or st(i).
2375 (define-instruction fdivd (segment source)
2376 (:printer floating-point ((op '(#b100 #b110))))
2377 (:printer floating-point-fp ((op '(#b000 #b110))))
2379 (if (fp-reg-tn-p source)
2380 (emit-byte segment #b11011000)
2381 (emit-byte segment #b11011100))
2382 (emit-fp-op segment source #b110)))
2384 ;;; Divide double, reverse:
2385 ;;; st(0) = memory or st(i) / st(0).
2386 (define-instruction fdivrd (segment source)
2387 (:printer floating-point ((op '(#b100 #b111))))
2388 (:printer floating-point-fp ((op '(#b000 #b111))))
2390 (if (fp-reg-tn-p source)
2391 (emit-byte segment #b11011000)
2392 (emit-byte segment #b11011100))
2393 (emit-fp-op segment source #b111)))
2395 ;;; Divide double, destination st(i):
2396 ;;; st(i) = st(i) / st(0).
2398 ;;; ASM386 syntax: FDIV ST(i), ST
2399 ;;; Gdb syntax: fdivr %st,%st(i)
2400 (define-instruction fdiv-sti (segment destination)
2401 (:printer floating-point-fp ((op '(#b100 #b111))))
2403 (aver (fp-reg-tn-p destination))
2404 (emit-byte segment #b11011100)
2405 (emit-fp-op segment destination #b111)))
2407 ;;; Divide double, reverse, destination st(i):
2408 ;;; st(i) = st(0) / st(i).
2410 ;;; ASM386 syntax: FDIVR ST(i), ST
2411 ;;; Gdb syntax: fdiv %st,%st(i)
2412 (define-instruction fdivr-sti (segment destination)
2413 (:printer floating-point-fp ((op '(#b100 #b110))))
2415 (aver (fp-reg-tn-p destination))
2416 (emit-byte segment #b11011100)
2417 (emit-fp-op segment destination #b110)))
2419 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2420 (define-instruction fxch (segment source)
2421 (:printer floating-point-fp ((op '(#b001 #b001))))
2423 (unless (and (tn-p source)
2424 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2426 (emit-byte segment #b11011001)
2427 (emit-fp-op segment source #b001)))
2429 ;;; Push 32-bit integer to st0.
2430 (define-instruction fild (segment source)
2431 (:printer floating-point ((op '(#b011 #b000))))
2433 (emit-byte segment #b11011011)
2434 (emit-fp-op segment source #b000)))
2436 ;;; Push 64-bit integer to st0.
2437 (define-instruction fildl (segment source)
2438 (:printer floating-point ((op '(#b111 #b101))))
2440 (emit-byte segment #b11011111)
2441 (emit-fp-op segment source #b101)))
2443 ;;; Store 32-bit integer.
2444 (define-instruction fist (segment dest)
2445 (:printer floating-point ((op '(#b011 #b010))))
2447 (emit-byte segment #b11011011)
2448 (emit-fp-op segment dest #b010)))
2450 ;;; Store and pop 32-bit integer.
2451 (define-instruction fistp (segment dest)
2452 (:printer floating-point ((op '(#b011 #b011))))
2454 (emit-byte segment #b11011011)
2455 (emit-fp-op segment dest #b011)))
2457 ;;; Store and pop 64-bit integer.
2458 (define-instruction fistpl (segment dest)
2459 (:printer floating-point ((op '(#b111 #b111))))
2461 (emit-byte segment #b11011111)
2462 (emit-fp-op segment dest #b111)))
2464 ;;; Store single from st(0) and pop.
2465 (define-instruction fstp (segment dest)
2466 (:printer floating-point ((op '(#b001 #b011))))
2468 (cond ((fp-reg-tn-p dest)
2469 (emit-byte segment #b11011101)
2470 (emit-fp-op segment dest #b011))
2472 (emit-byte segment #b11011001)
2473 (emit-fp-op segment dest #b011)))))
2475 ;;; Store double from st(0) and pop.
2476 (define-instruction fstpd (segment dest)
2477 (:printer floating-point ((op '(#b101 #b011))))
2478 (:printer floating-point-fp ((op '(#b101 #b011))))
2480 (cond ((fp-reg-tn-p dest)
2481 (emit-byte segment #b11011101)
2482 (emit-fp-op segment dest #b011))
2484 (emit-byte segment #b11011101)
2485 (emit-fp-op segment dest #b011)))))
2487 ;;; Store long from st(0) and pop.
2488 (define-instruction fstpl (segment dest)
2489 (:printer floating-point ((op '(#b011 #b111))))
2491 (emit-byte segment #b11011011)
2492 (emit-fp-op segment dest #b111)))
2494 ;;; Decrement stack-top pointer.
2495 (define-instruction fdecstp (segment)
2496 (:printer floating-point-no ((op #b10110)))
2498 (emit-byte segment #b11011001)
2499 (emit-byte segment #b11110110)))
2501 ;;; Increment stack-top pointer.
2502 (define-instruction fincstp (segment)
2503 (:printer floating-point-no ((op #b10111)))
2505 (emit-byte segment #b11011001)
2506 (emit-byte segment #b11110111)))
2508 ;;; Free fp register.
2509 (define-instruction ffree (segment dest)
2510 (:printer floating-point-fp ((op '(#b101 #b000))))
2512 (emit-byte segment #b11011101)
2513 (emit-fp-op segment dest #b000)))
2515 (define-instruction fabs (segment)
2516 (:printer floating-point-no ((op #b00001)))
2518 (emit-byte segment #b11011001)
2519 (emit-byte segment #b11100001)))
2521 (define-instruction fchs (segment)
2522 (:printer floating-point-no ((op #b00000)))
2524 (emit-byte segment #b11011001)
2525 (emit-byte segment #b11100000)))
2527 (define-instruction frndint(segment)
2528 (:printer floating-point-no ((op #b11100)))
2530 (emit-byte segment #b11011001)
2531 (emit-byte segment #b11111100)))
2534 (define-instruction fninit(segment)
2535 (:printer floating-point-5 ((op #b00011)))
2537 (emit-byte segment #b11011011)
2538 (emit-byte segment #b11100011)))
2540 ;;; Store Status Word to AX.
2541 (define-instruction fnstsw(segment)
2542 (:printer floating-point-st ((op #b00000)))
2544 (emit-byte segment #b11011111)
2545 (emit-byte segment #b11100000)))
2547 ;;; Load Control Word.
2549 ;;; src must be a memory location
2550 (define-instruction fldcw(segment src)
2551 (:printer floating-point ((op '(#b001 #b101))))
2553 (emit-byte segment #b11011001)
2554 (emit-fp-op segment src #b101)))
2556 ;;; Store Control Word.
2557 (define-instruction fnstcw(segment dst)
2558 (:printer floating-point ((op '(#b001 #b111))))
2560 (emit-byte segment #b11011001)
2561 (emit-fp-op segment dst #b111)))
2563 ;;; Store FP Environment.
2564 (define-instruction fstenv(segment dst)
2565 (:printer floating-point ((op '(#b001 #b110))))
2567 (emit-byte segment #b11011001)
2568 (emit-fp-op segment dst #b110)))
2570 ;;; Restore FP Environment.
2571 (define-instruction fldenv(segment src)
2572 (:printer floating-point ((op '(#b001 #b100))))
2574 (emit-byte segment #b11011001)
2575 (emit-fp-op segment src #b100)))
2578 (define-instruction fsave(segment dst)
2579 (:printer floating-point ((op '(#b101 #b110))))
2581 (emit-byte segment #b11011101)
2582 (emit-fp-op segment dst #b110)))
2584 ;;; Restore FP State.
2585 (define-instruction frstor(segment src)
2586 (:printer floating-point ((op '(#b101 #b100))))
2588 (emit-byte segment #b11011101)
2589 (emit-fp-op segment src #b100)))
2591 ;;; Clear exceptions.
2592 (define-instruction fnclex(segment)
2593 (:printer floating-point-5 ((op #b00010)))
2595 (emit-byte segment #b11011011)
2596 (emit-byte segment #b11100010)))
2599 (define-instruction fcom (segment src)
2600 (:printer floating-point ((op '(#b000 #b010))))
2602 (emit-byte segment #b11011000)
2603 (emit-fp-op segment src #b010)))
2605 (define-instruction fcomd (segment src)
2606 (:printer floating-point ((op '(#b100 #b010))))
2607 (:printer floating-point-fp ((op '(#b000 #b010))))
2609 (if (fp-reg-tn-p src)
2610 (emit-byte segment #b11011000)
2611 (emit-byte segment #b11011100))
2612 (emit-fp-op segment src #b010)))
2614 ;;; Compare ST1 to ST0, popping the stack twice.
2615 (define-instruction fcompp (segment)
2616 (:printer floating-point-3 ((op '(#b110 #b011001))))
2618 (emit-byte segment #b11011110)
2619 (emit-byte segment #b11011001)))
2621 ;;; unordered comparison
2622 (define-instruction fucom (segment src)
2623 (:printer floating-point-fp ((op '(#b101 #b100))))
2625 (aver (fp-reg-tn-p src))
2626 (emit-byte segment #b11011101)
2627 (emit-fp-op segment src #b100)))
2629 (define-instruction ftst (segment)
2630 (:printer floating-point-no ((op #b00100)))
2632 (emit-byte segment #b11011001)
2633 (emit-byte segment #b11100100)))
2637 (define-instruction fsqrt(segment)
2638 (:printer floating-point-no ((op #b11010)))
2640 (emit-byte segment #b11011001)
2641 (emit-byte segment #b11111010)))
2643 (define-instruction fscale(segment)
2644 (:printer floating-point-no ((op #b11101)))
2646 (emit-byte segment #b11011001)
2647 (emit-byte segment #b11111101)))
2649 (define-instruction fxtract(segment)
2650 (:printer floating-point-no ((op #b10100)))
2652 (emit-byte segment #b11011001)
2653 (emit-byte segment #b11110100)))
2655 (define-instruction fsin(segment)
2656 (:printer floating-point-no ((op #b11110)))
2658 (emit-byte segment #b11011001)
2659 (emit-byte segment #b11111110)))
2661 (define-instruction fcos(segment)
2662 (:printer floating-point-no ((op #b11111)))
2664 (emit-byte segment #b11011001)
2665 (emit-byte segment #b11111111)))
2667 (define-instruction fprem1(segment)
2668 (:printer floating-point-no ((op #b10101)))
2670 (emit-byte segment #b11011001)
2671 (emit-byte segment #b11110101)))
2673 (define-instruction fprem(segment)
2674 (:printer floating-point-no ((op #b11000)))
2676 (emit-byte segment #b11011001)
2677 (emit-byte segment #b11111000)))
2679 (define-instruction fxam (segment)
2680 (:printer floating-point-no ((op #b00101)))
2682 (emit-byte segment #b11011001)
2683 (emit-byte segment #b11100101)))
2685 ;;; These do push/pop to stack and need special handling
2686 ;;; in any VOPs that use them. See the book.
2688 ;;; st0 <- st1*log2(st0)
2689 (define-instruction fyl2x(segment) ; pops stack
2690 (:printer floating-point-no ((op #b10001)))
2692 (emit-byte segment #b11011001)
2693 (emit-byte segment #b11110001)))
2695 (define-instruction fyl2xp1(segment)
2696 (:printer floating-point-no ((op #b11001)))
2698 (emit-byte segment #b11011001)
2699 (emit-byte segment #b11111001)))
2701 (define-instruction f2xm1(segment)
2702 (:printer floating-point-no ((op #b10000)))
2704 (emit-byte segment #b11011001)
2705 (emit-byte segment #b11110000)))
2707 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
2708 (:printer floating-point-no ((op #b10010)))
2710 (emit-byte segment #b11011001)
2711 (emit-byte segment #b11110010)))
2713 (define-instruction fpatan(segment) ; POPS STACK
2714 (:printer floating-point-no ((op #b10011)))
2716 (emit-byte segment #b11011001)
2717 (emit-byte segment #b11110011)))
2719 ;;;; loading constants
2721 (define-instruction fldz(segment)
2722 (:printer floating-point-no ((op #b01110)))
2724 (emit-byte segment #b11011001)
2725 (emit-byte segment #b11101110)))
2727 (define-instruction fld1(segment)
2728 (:printer floating-point-no ((op #b01000)))
2730 (emit-byte segment #b11011001)
2731 (emit-byte segment #b11101000)))
2733 (define-instruction fldpi(segment)
2734 (:printer floating-point-no ((op #b01011)))
2736 (emit-byte segment #b11011001)
2737 (emit-byte segment #b11101011)))
2739 (define-instruction fldl2t(segment)
2740 (:printer floating-point-no ((op #b01001)))
2742 (emit-byte segment #b11011001)
2743 (emit-byte segment #b11101001)))
2745 (define-instruction fldl2e(segment)
2746 (:printer floating-point-no ((op #b01010)))
2748 (emit-byte segment #b11011001)
2749 (emit-byte segment #b11101010)))
2751 (define-instruction fldlg2(segment)
2752 (:printer floating-point-no ((op #b01100)))
2754 (emit-byte segment #b11011001)
2755 (emit-byte segment #b11101100)))
2757 (define-instruction fldln2(segment)
2758 (:printer floating-point-no ((op #b01101)))
2760 (emit-byte segment #b11011001)
2761 (emit-byte segment #b11101101)))
2765 (define-instruction cpuid (segment)
2766 (:printer two-bytes ((op '(#b00001111 #b10100010))))
2768 (emit-byte segment #b00001111)
2769 (emit-byte segment #b10100010)))
2771 (define-instruction rdtsc (segment)
2772 (:printer two-bytes ((op '(#b00001111 #b00110001))))
2774 (emit-byte segment #b00001111)
2775 (emit-byte segment #b00110001)))