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 ;;; Same as simple, but with direction bit
382 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
383 (op :field (byte 6 2))
384 (dir :field (byte 1 1)))
386 ;;; Same as simple, but with the immediate value occurring by default,
387 ;;; and with an appropiate printer.
388 (sb!disassem:define-instruction-format (accum-imm 8
390 :default-printer '(:name
391 :tab accum ", " imm))
392 (imm :type 'imm-data))
394 (sb!disassem:define-instruction-format (reg-no-width 8
395 :default-printer '(:name :tab reg))
396 (op :field (byte 5 3))
397 (reg :field (byte 3 0) :type 'word-reg)
399 (accum :type 'word-accum)
402 ;;; adds a width field to reg-no-width
403 (sb!disassem:define-instruction-format (reg 8
404 :default-printer '(:name :tab reg))
405 (op :field (byte 4 4))
406 (width :field (byte 1 3) :type 'width)
407 (reg :field (byte 3 0) :type 'reg)
413 ;;; Same as reg, but with direction bit
414 (sb!disassem:define-instruction-format (reg-dir 8 :include 'reg)
415 (op :field (byte 3 5))
416 (dir :field (byte 1 4)))
418 (sb!disassem:define-instruction-format (two-bytes 16
419 :default-printer '(:name))
420 (op :fields (list (byte 8 0) (byte 8 8))))
422 (sb!disassem:define-instruction-format (reg-reg/mem 16
424 `(:name :tab reg ", " reg/mem))
425 (op :field (byte 7 1))
426 (width :field (byte 1 0) :type 'width)
427 (reg/mem :fields (list (byte 2 14) (byte 3 8))
429 (reg :field (byte 3 11) :type 'reg)
433 ;;; same as reg-reg/mem, but with direction bit
434 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
435 :include 'reg-reg/mem
439 ,(swap-if 'dir 'reg/mem ", " 'reg)))
440 (op :field (byte 6 2))
441 (dir :field (byte 1 1)))
443 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
444 (sb!disassem:define-instruction-format (reg/mem 16
445 :default-printer '(:name :tab reg/mem))
446 (op :fields (list (byte 7 1) (byte 3 11)))
447 (width :field (byte 1 0) :type 'width)
448 (reg/mem :fields (list (byte 2 14) (byte 3 8))
449 :type 'sized-reg/mem)
453 ;;; Same as reg/mem, but with the immediate value occurring by default,
454 ;;; and with an appropiate printer.
455 (sb!disassem:define-instruction-format (reg/mem-imm 16
458 '(:name :tab reg/mem ", " imm))
459 (reg/mem :type 'sized-reg/mem)
460 (imm :type 'imm-data))
462 ;;; Same as reg/mem, but with using the accumulator in the default printer
463 (sb!disassem:define-instruction-format
465 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
466 (reg/mem :type 'reg/mem) ; don't need a size
467 (accum :type 'accum))
469 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
470 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
472 `(:name :tab reg ", " reg/mem))
473 (prefix :field (byte 8 0) :value #b00001111)
474 (op :field (byte 7 9))
475 (width :field (byte 1 8) :type 'width)
476 (reg/mem :fields (list (byte 2 22) (byte 3 16))
478 (reg :field (byte 3 19) :type 'reg)
482 ;;; Same as reg/mem, but with a prefix of #b00001111
483 (sb!disassem:define-instruction-format (ext-reg/mem 24
484 :default-printer '(:name :tab reg/mem))
485 (prefix :field (byte 8 0) :value #b00001111)
486 (op :fields (list (byte 7 9) (byte 3 19)))
487 (width :field (byte 1 8) :type 'width)
488 (reg/mem :fields (list (byte 2 22) (byte 3 16))
489 :type 'sized-reg/mem)
493 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
494 :include 'ext-reg/mem
496 '(:name :tab reg/mem ", " imm))
497 (imm :type 'imm-data))
499 ;;;; This section was added by jrd, for fp instructions.
501 ;;; regular fp inst to/from registers/memory
502 (sb!disassem:define-instruction-format (floating-point 16
504 `(:name :tab reg/mem))
505 (prefix :field (byte 5 3) :value #b11011)
506 (op :fields (list (byte 3 0) (byte 3 11)))
507 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
509 ;;; fp insn to/from fp reg
510 (sb!disassem:define-instruction-format (floating-point-fp 16
511 :default-printer `(:name :tab fp-reg))
512 (prefix :field (byte 5 3) :value #b11011)
513 (suffix :field (byte 2 14) :value #b11)
514 (op :fields (list (byte 3 0) (byte 3 11)))
515 (fp-reg :field (byte 3 8) :type 'fp-reg))
517 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
518 (sb!disassem:define-instruction-format
519 (floating-point-fp-d 16
520 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
521 (prefix :field (byte 5 3) :value #b11011)
522 (suffix :field (byte 2 14) :value #b11)
523 (op :fields (list (byte 2 0) (byte 3 11)))
524 (d :field (byte 1 2))
525 (fp-reg :field (byte 3 8) :type 'fp-reg))
528 ;;; (added by (?) pfw)
529 ;;; fp no operand isns
530 (sb!disassem:define-instruction-format (floating-point-no 16
531 :default-printer '(:name))
532 (prefix :field (byte 8 0) :value #b11011001)
533 (suffix :field (byte 3 13) :value #b111)
534 (op :field (byte 5 8)))
536 (sb!disassem:define-instruction-format (floating-point-3 16
537 :default-printer '(:name))
538 (prefix :field (byte 5 3) :value #b11011)
539 (suffix :field (byte 2 14) :value #b11)
540 (op :fields (list (byte 3 0) (byte 6 8))))
542 (sb!disassem:define-instruction-format (floating-point-5 16
543 :default-printer '(:name))
544 (prefix :field (byte 8 0) :value #b11011011)
545 (suffix :field (byte 3 13) :value #b111)
546 (op :field (byte 5 8)))
548 (sb!disassem:define-instruction-format (floating-point-st 16
549 :default-printer '(:name))
550 (prefix :field (byte 8 0) :value #b11011111)
551 (suffix :field (byte 3 13) :value #b111)
552 (op :field (byte 5 8)))
554 (sb!disassem:define-instruction-format (string-op 8
556 :default-printer '(:name width)))
558 (sb!disassem:define-instruction-format (short-cond-jump 16)
559 (op :field (byte 4 4))
560 (cc :field (byte 4 0) :type 'condition-code)
561 (label :field (byte 8 8) :type 'displacement))
563 (sb!disassem:define-instruction-format (short-jump 16
564 :default-printer '(:name :tab label))
565 (const :field (byte 4 4) :value #b1110)
566 (op :field (byte 4 0))
567 (label :field (byte 8 8) :type 'displacement))
569 (sb!disassem:define-instruction-format (near-cond-jump 16)
570 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
571 (cc :field (byte 4 8) :type 'condition-code)
572 ;; The disassembler currently doesn't let you have an instruction > 32 bits
573 ;; long, so we fake it by using a prefilter to read the offset.
574 (label :type 'displacement
575 :prefilter (lambda (value dstate)
576 (declare (ignore value)) ; always nil anyway
577 (sb!disassem:read-signed-suffix 32 dstate))))
579 (sb!disassem:define-instruction-format (near-jump 8
580 :default-printer '(:name :tab label))
581 (op :field (byte 8 0))
582 ;; The disassembler currently doesn't let you have an instruction > 32 bits
583 ;; long, so we fake it by using a prefilter to read the address.
584 (label :type 'displacement
585 :prefilter (lambda (value dstate)
586 (declare (ignore value)) ; always nil anyway
587 (sb!disassem:read-signed-suffix 32 dstate))))
590 (sb!disassem:define-instruction-format (cond-set 24
591 :default-printer '('set cc :tab reg/mem))
592 (prefix :field (byte 8 0) :value #b00001111)
593 (op :field (byte 4 12) :value #b1001)
594 (cc :field (byte 4 8) :type 'condition-code)
595 (reg/mem :fields (list (byte 2 22) (byte 3 16))
597 (reg :field (byte 3 19) :value #b000))
599 (sb!disassem:define-instruction-format (cond-move 24
601 '('cmov cc :tab reg ", " reg/mem))
602 (prefix :field (byte 8 0) :value #b00001111)
603 (op :field (byte 4 12) :value #b0100)
604 (cc :field (byte 4 8) :type 'condition-code)
605 (reg/mem :fields (list (byte 2 22) (byte 3 16))
607 (reg :field (byte 3 19) :type 'reg))
609 (sb!disassem:define-instruction-format (enter-format 32
610 :default-printer '(:name
612 (:unless (:constant 0)
614 (op :field (byte 8 0))
615 (disp :field (byte 16 8))
616 (level :field (byte 8 24)))
618 ;;; Single byte instruction with an immediate byte argument.
619 (sb!disassem:define-instruction-format (byte-imm 16
620 :default-printer '(:name :tab code))
621 (op :field (byte 8 0))
622 (code :field (byte 8 8)))
624 ;;;; primitive emitters
626 (define-bitfield-emitter emit-word 16
629 (define-bitfield-emitter emit-dword 32
632 (define-bitfield-emitter emit-byte-with-reg 8
633 (byte 5 3) (byte 3 0))
635 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
636 (byte 2 6) (byte 3 3) (byte 3 0))
638 (define-bitfield-emitter emit-sib-byte 8
639 (byte 2 6) (byte 3 3) (byte 3 0))
643 (defun emit-absolute-fixup (segment fixup)
644 (note-fixup segment :absolute fixup)
645 (let ((offset (fixup-offset fixup)))
647 (emit-back-patch segment
648 4 ; FIXME: n-word-bytes
649 (lambda (segment posn)
650 (declare (ignore posn))
652 (- (+ (component-header-length)
653 (or (label-position offset)
655 other-pointer-lowtag))))
656 (emit-dword segment (or offset 0)))))
658 (defun emit-relative-fixup (segment fixup)
659 (note-fixup segment :relative fixup)
660 (emit-dword segment (or (fixup-offset fixup) 0)))
662 ;;;; the effective-address (ea) structure
664 (defun reg-tn-encoding (tn)
665 (declare (type tn tn))
666 (aver (eq (sb-name (sc-sb (tn-sc tn))) 'registers))
667 (let ((offset (tn-offset tn)))
668 (logior (ash (logand offset 1) 2)
671 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
673 (size nil :type (member :byte :word :dword))
674 (base nil :type (or tn null))
675 (index nil :type (or tn null))
676 (scale 1 :type (member 1 2 4 8))
677 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
678 (def!method print-object ((ea ea) stream)
679 (cond ((or *print-escape* *print-readably*)
680 (print-unreadable-object (ea stream :type t)
682 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
686 (let ((scale (ea-scale ea)))
687 (if (= scale 1) nil scale))
690 (format stream "~A PTR [" (symbol-name (ea-size ea)))
692 (write-string (sb!c::location-print-name (ea-base ea)) stream)
694 (write-string "+" stream)))
696 (write-string (sb!c::location-print-name (ea-index ea)) stream))
697 (unless (= (ea-scale ea) 1)
698 (format stream "*~A" (ea-scale ea)))
699 (typecase (ea-disp ea)
702 (format stream "~@D" (ea-disp ea)))
704 (format stream "+~A" (ea-disp ea))))
705 (write-char #\] stream))))
707 (defun emit-ea (segment thing reg &optional allow-constants)
710 (ecase (sb-name (sc-sb (tn-sc thing)))
712 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
714 ;; Convert stack tns into an index off of EBP.
715 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
716 (cond ((< -128 disp 127)
717 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
718 (emit-byte segment disp))
720 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
721 (emit-dword segment disp)))))
723 (unless allow-constants
725 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
726 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
727 (emit-absolute-fixup segment
730 (- (* (tn-offset thing) n-word-bytes)
731 other-pointer-lowtag))))))
733 (let* ((base (ea-base thing))
734 (index (ea-index thing))
735 (scale (ea-scale thing))
736 (disp (ea-disp thing))
737 (mod (cond ((or (null base)
739 (not (= (reg-tn-encoding base) #b101))))
741 ((and (fixnump disp) (<= -128 disp 127))
745 (r/m (cond (index #b100)
747 (t (reg-tn-encoding base)))))
748 (emit-mod-reg-r/m-byte segment mod reg r/m)
750 (let ((ss (1- (integer-length scale)))
751 (index (if (null index)
753 (let ((index (reg-tn-encoding index)))
755 (error "can't index off of ESP")
757 (base (if (null base)
759 (reg-tn-encoding base))))
760 (emit-sib-byte segment ss index base)))
762 (emit-byte segment disp))
763 ((or (= mod #b10) (null base))
765 (emit-absolute-fixup segment disp)
766 (emit-dword segment disp))))))
768 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
769 (emit-absolute-fixup segment thing))))
771 (defun fp-reg-tn-p (thing)
773 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
775 ;;; like the above, but for fp-instructions--jrd
776 (defun emit-fp-op (segment thing op)
777 (if (fp-reg-tn-p thing)
778 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
781 (emit-ea segment thing op)))
783 (defun byte-reg-p (thing)
785 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
786 (member (sc-name (tn-sc thing)) *byte-sc-names*)
789 (defun byte-ea-p (thing)
791 (ea (eq (ea-size thing) :byte))
793 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
796 (defun word-reg-p (thing)
798 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
799 (member (sc-name (tn-sc thing)) *word-sc-names*)
802 (defun word-ea-p (thing)
804 (ea (eq (ea-size thing) :word))
805 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
808 (defun dword-reg-p (thing)
810 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
811 (member (sc-name (tn-sc thing)) *dword-sc-names*)
814 (defun dword-ea-p (thing)
816 (ea (eq (ea-size thing) :dword))
818 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
821 (defun register-p (thing)
823 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
825 (defun accumulator-p (thing)
826 (and (register-p thing)
827 (= (tn-offset thing) 0)))
831 (def!constant +operand-size-prefix-byte+ #b01100110)
833 (defun maybe-emit-operand-size-prefix (segment size)
834 (unless (or (eq size :byte) (eq size +default-operand-size+))
835 (emit-byte segment +operand-size-prefix-byte+)))
837 (defun operand-size (thing)
840 ;; FIXME: might as well be COND instead of having to use #. readmacro
841 ;; to hack up the code
842 (case (sc-name (tn-sc thing))
849 ;; added by jrd: float-registers is a separate size (?)
855 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
861 (defun matching-operand-size (dst src)
862 (let ((dst-size (operand-size dst))
863 (src-size (operand-size src)))
866 (if (eq dst-size src-size)
868 (error "size mismatch: ~S is a ~S and ~S is a ~S."
869 dst dst-size src src-size))
873 (error "can't tell the size of either ~S or ~S" dst src)))))
875 (defun emit-sized-immediate (segment size value)
878 (emit-byte segment value))
880 (emit-word segment value))
882 (emit-dword segment value))))
884 ;;;; general data transfer
886 (define-instruction mov (segment dst src)
887 ;; immediate to register
888 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
889 '(:name :tab reg ", " imm))
890 ;; absolute mem to/from accumulator
891 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
892 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
893 ;; register to/from register/memory
894 (:printer reg-reg/mem-dir ((op #b100010)))
895 ;; immediate to register/memory
896 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
899 (let ((size (matching-operand-size dst src)))
900 (maybe-emit-operand-size-prefix segment size)
901 (cond ((register-p dst)
902 (cond ((integerp src)
903 (emit-byte-with-reg segment
907 (reg-tn-encoding dst))
908 (emit-sized-immediate segment size src))
909 ((and (fixup-p src) (accumulator-p dst))
914 (emit-absolute-fixup segment src))
920 (emit-ea segment src (reg-tn-encoding dst) t))))
921 ((and (fixup-p dst) (accumulator-p src))
922 (emit-byte segment (if (eq size :byte) #b10100010 #b10100011))
923 (emit-absolute-fixup segment dst))
925 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
926 (emit-ea segment dst #b000)
927 (emit-sized-immediate segment size src))
929 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
930 (emit-ea segment dst (reg-tn-encoding src)))
932 (aver (eq size :dword))
933 (emit-byte segment #b11000111)
934 (emit-ea segment dst #b000)
935 (emit-absolute-fixup segment src))
937 (error "bogus arguments to MOV: ~S ~S" dst src))))))
939 (defun emit-move-with-extension (segment dst src opcode)
940 (aver (register-p dst))
941 (let ((dst-size (operand-size dst))
942 (src-size (operand-size src)))
945 (aver (eq src-size :byte))
946 (maybe-emit-operand-size-prefix segment :word)
947 (emit-byte segment #b00001111)
948 (emit-byte segment opcode)
949 (emit-ea segment src (reg-tn-encoding dst)))
953 (maybe-emit-operand-size-prefix segment :dword)
954 (emit-byte segment #b00001111)
955 (emit-byte segment opcode)
956 (emit-ea segment src (reg-tn-encoding dst)))
958 (emit-byte segment #b00001111)
959 (emit-byte segment (logior opcode 1))
960 (emit-ea segment src (reg-tn-encoding dst))))))))
962 (define-instruction movsx (segment dst src)
963 (:printer ext-reg-reg/mem ((op #b1011111) (reg nil :type 'word-reg)))
964 (:emitter (emit-move-with-extension segment dst src #b10111110)))
966 (define-instruction movzx (segment dst src)
967 (:printer ext-reg-reg/mem ((op #b1011011) (reg nil :type 'word-reg)))
968 (:emitter (emit-move-with-extension segment dst src #b10110110)))
970 (define-instruction push (segment src)
972 (:printer reg-no-width ((op #b01010)))
974 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
976 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
978 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
980 ;; ### segment registers?
983 (cond ((integerp src)
984 (cond ((<= -128 src 127)
985 (emit-byte segment #b01101010)
986 (emit-byte segment src))
988 (emit-byte segment #b01101000)
989 (emit-dword segment src))))
991 ;; Interpret the fixup as an immediate dword to push.
992 (emit-byte segment #b01101000)
993 (emit-absolute-fixup segment src))
995 (let ((size (operand-size src)))
996 (aver (not (eq size :byte)))
997 (maybe-emit-operand-size-prefix segment size)
998 (cond ((register-p src)
999 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1001 (emit-byte segment #b11111111)
1002 (emit-ea segment src #b110 t))))))))
1004 (define-instruction pusha (segment)
1005 (:printer byte ((op #b01100000)))
1007 (emit-byte segment #b01100000)))
1009 (define-instruction pop (segment dst)
1010 (:printer reg-no-width ((op #b01011)))
1011 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
1013 (let ((size (operand-size dst)))
1014 (aver (not (eq size :byte)))
1015 (maybe-emit-operand-size-prefix segment size)
1016 (cond ((register-p dst)
1017 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1019 (emit-byte segment #b10001111)
1020 (emit-ea segment dst #b000))))))
1022 (define-instruction popa (segment)
1023 (:printer byte ((op #b01100001)))
1025 (emit-byte segment #b01100001)))
1027 (define-instruction xchg (segment operand1 operand2)
1028 ;; Register with accumulator.
1029 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1030 ;; Register/Memory with Register.
1031 (:printer reg-reg/mem ((op #b1000011)))
1033 (let ((size (matching-operand-size operand1 operand2)))
1034 (maybe-emit-operand-size-prefix segment size)
1035 (labels ((xchg-acc-with-something (acc something)
1036 (if (and (not (eq size :byte)) (register-p something))
1037 (emit-byte-with-reg segment
1039 (reg-tn-encoding something))
1040 (xchg-reg-with-something acc something)))
1041 (xchg-reg-with-something (reg something)
1042 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1043 (emit-ea segment something (reg-tn-encoding reg))))
1044 (cond ((accumulator-p operand1)
1045 (xchg-acc-with-something operand1 operand2))
1046 ((accumulator-p operand2)
1047 (xchg-acc-with-something operand2 operand1))
1048 ((register-p operand1)
1049 (xchg-reg-with-something operand1 operand2))
1050 ((register-p operand2)
1051 (xchg-reg-with-something operand2 operand1))
1053 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1055 (define-instruction lea (segment dst src)
1056 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1058 (aver (dword-reg-p dst))
1059 (emit-byte segment #b10001101)
1060 (emit-ea segment src (reg-tn-encoding dst))))
1062 (define-instruction cmpxchg (segment dst src)
1063 ;; Register/Memory with Register.
1064 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1066 (aver (register-p src))
1067 (let ((size (matching-operand-size src dst)))
1068 (maybe-emit-operand-size-prefix segment size)
1069 (emit-byte segment #b00001111)
1070 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1071 (emit-ea segment dst (reg-tn-encoding src)))))
1075 (define-instruction fs-segment-prefix (segment)
1077 (emit-byte segment #x64)))
1079 ;;;; flag control instructions
1081 ;;; CLC -- Clear Carry Flag.
1082 (define-instruction clc (segment)
1083 (:printer byte ((op #b11111000)))
1085 (emit-byte segment #b11111000)))
1087 ;;; CLD -- Clear Direction Flag.
1088 (define-instruction cld (segment)
1089 (:printer byte ((op #b11111100)))
1091 (emit-byte segment #b11111100)))
1093 ;;; CLI -- Clear Iterrupt Enable Flag.
1094 (define-instruction cli (segment)
1095 (:printer byte ((op #b11111010)))
1097 (emit-byte segment #b11111010)))
1099 ;;; CMC -- Complement Carry Flag.
1100 (define-instruction cmc (segment)
1101 (:printer byte ((op #b11110101)))
1103 (emit-byte segment #b11110101)))
1105 ;;; LAHF -- Load AH into flags.
1106 (define-instruction lahf (segment)
1107 (:printer byte ((op #b10011111)))
1109 (emit-byte segment #b10011111)))
1111 ;;; POPF -- Pop flags.
1112 (define-instruction popf (segment)
1113 (:printer byte ((op #b10011101)))
1115 (emit-byte segment #b10011101)))
1117 ;;; PUSHF -- push flags.
1118 (define-instruction pushf (segment)
1119 (:printer byte ((op #b10011100)))
1121 (emit-byte segment #b10011100)))
1123 ;;; SAHF -- Store AH into flags.
1124 (define-instruction sahf (segment)
1125 (:printer byte ((op #b10011110)))
1127 (emit-byte segment #b10011110)))
1129 ;;; STC -- Set Carry Flag.
1130 (define-instruction stc (segment)
1131 (:printer byte ((op #b11111001)))
1133 (emit-byte segment #b11111001)))
1135 ;;; STD -- Set Direction Flag.
1136 (define-instruction std (segment)
1137 (:printer byte ((op #b11111101)))
1139 (emit-byte segment #b11111101)))
1141 ;;; STI -- Set Interrupt Enable Flag.
1142 (define-instruction sti (segment)
1143 (:printer byte ((op #b11111011)))
1145 (emit-byte segment #b11111011)))
1149 (defun emit-random-arith-inst (name segment dst src opcode
1150 &optional allow-constants)
1151 (let ((size (matching-operand-size dst src)))
1152 (maybe-emit-operand-size-prefix segment size)
1155 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1156 (emit-byte segment #b10000011)
1157 (emit-ea segment dst opcode allow-constants)
1158 (emit-byte segment src))
1159 ((accumulator-p dst)
1166 (emit-sized-immediate segment size src))
1168 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1169 (emit-ea segment dst opcode allow-constants)
1170 (emit-sized-immediate segment size src))))
1175 (if (eq size :byte) #b00000000 #b00000001)))
1176 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1181 (if (eq size :byte) #b00000010 #b00000011)))
1182 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1184 (error "bogus operands to ~A" name)))))
1186 (eval-when (:compile-toplevel :execute)
1187 (defun arith-inst-printer-list (subop)
1188 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1189 (reg/mem-imm ((op (#b1000000 ,subop))))
1190 (reg/mem-imm ((op (#b1000001 ,subop))
1191 (imm nil :type signed-imm-byte)))
1192 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1195 (define-instruction add (segment dst src)
1196 (:printer-list (arith-inst-printer-list #b000))
1197 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1199 (define-instruction adc (segment dst src)
1200 (:printer-list (arith-inst-printer-list #b010))
1201 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1203 (define-instruction sub (segment dst src)
1204 (:printer-list (arith-inst-printer-list #b101))
1205 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1207 (define-instruction sbb (segment dst src)
1208 (:printer-list (arith-inst-printer-list #b011))
1209 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1211 (define-instruction cmp (segment dst src)
1212 (:printer-list (arith-inst-printer-list #b111))
1213 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1215 (define-instruction inc (segment dst)
1217 (:printer reg-no-width ((op #b01000)))
1219 (:printer reg/mem ((op '(#b1111111 #b000))))
1221 (let ((size (operand-size dst)))
1222 (maybe-emit-operand-size-prefix segment size)
1223 (cond ((and (not (eq size :byte)) (register-p dst))
1224 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1226 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1227 (emit-ea segment dst #b000))))))
1229 (define-instruction dec (segment dst)
1231 (:printer reg-no-width ((op #b01001)))
1233 (:printer reg/mem ((op '(#b1111111 #b001))))
1235 (let ((size (operand-size dst)))
1236 (maybe-emit-operand-size-prefix segment size)
1237 (cond ((and (not (eq size :byte)) (register-p dst))
1238 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1240 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1241 (emit-ea segment dst #b001))))))
1243 (define-instruction neg (segment dst)
1244 (:printer reg/mem ((op '(#b1111011 #b011))))
1246 (let ((size (operand-size dst)))
1247 (maybe-emit-operand-size-prefix segment size)
1248 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1249 (emit-ea segment dst #b011))))
1251 (define-instruction aaa (segment)
1252 (:printer byte ((op #b00110111)))
1254 (emit-byte segment #b00110111)))
1256 (define-instruction aas (segment)
1257 (:printer byte ((op #b00111111)))
1259 (emit-byte segment #b00111111)))
1261 (define-instruction daa (segment)
1262 (:printer byte ((op #b00100111)))
1264 (emit-byte segment #b00100111)))
1266 (define-instruction das (segment)
1267 (:printer byte ((op #b00101111)))
1269 (emit-byte segment #b00101111)))
1271 (define-instruction mul (segment dst src)
1272 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1274 (let ((size (matching-operand-size dst src)))
1275 (aver (accumulator-p dst))
1276 (maybe-emit-operand-size-prefix segment size)
1277 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1278 (emit-ea segment src #b100))))
1280 (define-instruction imul (segment dst &optional src1 src2)
1281 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1282 (:printer ext-reg-reg/mem ((op #b1010111)))
1283 (:printer reg-reg/mem ((op #b0110100) (width 1)
1284 (imm nil :type 'signed-imm-word))
1285 '(:name :tab reg ", " reg/mem ", " imm))
1286 (:printer reg-reg/mem ((op #b0110101) (width 1)
1287 (imm nil :type 'signed-imm-byte))
1288 '(:name :tab reg ", " reg/mem ", " imm))
1290 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1291 (let* ((size (matching-operand-size reg r/m))
1292 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1293 (maybe-emit-operand-size-prefix segment size)
1294 (emit-byte segment (if sx #b01101011 #b01101001))
1295 (emit-ea segment r/m (reg-tn-encoding reg))
1297 (emit-byte segment immed)
1298 (emit-sized-immediate segment size immed)))))
1300 (r/m-with-immed-to-reg dst src1 src2))
1303 (r/m-with-immed-to-reg dst dst src1)
1304 (let ((size (matching-operand-size dst src1)))
1305 (maybe-emit-operand-size-prefix segment size)
1306 (emit-byte segment #b00001111)
1307 (emit-byte segment #b10101111)
1308 (emit-ea segment src1 (reg-tn-encoding dst)))))
1310 (let ((size (operand-size dst)))
1311 (maybe-emit-operand-size-prefix segment size)
1312 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1313 (emit-ea segment dst #b101)))))))
1315 (define-instruction div (segment dst src)
1316 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1318 (let ((size (matching-operand-size dst src)))
1319 (aver (accumulator-p dst))
1320 (maybe-emit-operand-size-prefix segment size)
1321 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1322 (emit-ea segment src #b110))))
1324 (define-instruction idiv (segment dst src)
1325 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1327 (let ((size (matching-operand-size dst src)))
1328 (aver (accumulator-p dst))
1329 (maybe-emit-operand-size-prefix segment size)
1330 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1331 (emit-ea segment src #b111))))
1333 (define-instruction aad (segment)
1334 (:printer two-bytes ((op '(#b11010101 #b00001010))))
1336 (emit-byte segment #b11010101)
1337 (emit-byte segment #b00001010)))
1339 (define-instruction aam (segment)
1340 (:printer two-bytes ((op '(#b11010100 #b00001010))))
1342 (emit-byte segment #b11010100)
1343 (emit-byte segment #b00001010)))
1345 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1346 (define-instruction cbw (segment)
1348 (maybe-emit-operand-size-prefix segment :word)
1349 (emit-byte segment #b10011000)))
1351 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1352 (define-instruction cwde (segment)
1354 (maybe-emit-operand-size-prefix segment :dword)
1355 (emit-byte segment #b10011000)))
1357 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1358 (define-instruction cwd (segment)
1360 (maybe-emit-operand-size-prefix segment :word)
1361 (emit-byte segment #b10011001)))
1363 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1364 (define-instruction cdq (segment)
1365 (:printer byte ((op #b10011001)))
1367 (maybe-emit-operand-size-prefix segment :dword)
1368 (emit-byte segment #b10011001)))
1370 (define-instruction xadd (segment dst src)
1371 ;; Register/Memory with Register.
1372 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1374 (aver (register-p src))
1375 (let ((size (matching-operand-size src dst)))
1376 (maybe-emit-operand-size-prefix segment size)
1377 (emit-byte segment #b00001111)
1378 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1379 (emit-ea segment dst (reg-tn-encoding src)))))
1384 (defun emit-shift-inst (segment dst amount opcode)
1385 (let ((size (operand-size dst)))
1386 (maybe-emit-operand-size-prefix segment size)
1387 (multiple-value-bind (major-opcode immed)
1389 (:cl (values #b11010010 nil))
1390 (1 (values #b11010000 nil))
1391 (t (values #b11000000 t)))
1393 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1394 (emit-ea segment dst opcode)
1396 (emit-byte segment amount)))))
1398 (eval-when (:compile-toplevel :execute)
1399 (defun shift-inst-printer-list (subop)
1400 `((reg/mem ((op (#b1101000 ,subop)))
1401 (:name :tab reg/mem ", 1"))
1402 (reg/mem ((op (#b1101001 ,subop)))
1403 (:name :tab reg/mem ", " 'cl))
1404 (reg/mem-imm ((op (#b1100000 ,subop))
1405 (imm nil :type signed-imm-byte))))))
1407 (define-instruction rol (segment dst amount)
1409 (shift-inst-printer-list #b000))
1411 (emit-shift-inst segment dst amount #b000)))
1413 (define-instruction ror (segment dst amount)
1415 (shift-inst-printer-list #b001))
1417 (emit-shift-inst segment dst amount #b001)))
1419 (define-instruction rcl (segment dst amount)
1421 (shift-inst-printer-list #b010))
1423 (emit-shift-inst segment dst amount #b010)))
1425 (define-instruction rcr (segment dst amount)
1427 (shift-inst-printer-list #b011))
1429 (emit-shift-inst segment dst amount #b011)))
1431 (define-instruction shl (segment dst amount)
1433 (shift-inst-printer-list #b100))
1435 (emit-shift-inst segment dst amount #b100)))
1437 (define-instruction shr (segment dst amount)
1439 (shift-inst-printer-list #b101))
1441 (emit-shift-inst segment dst amount #b101)))
1443 (define-instruction sar (segment dst amount)
1445 (shift-inst-printer-list #b111))
1447 (emit-shift-inst segment dst amount #b111)))
1449 (defun emit-double-shift (segment opcode dst src amt)
1450 (let ((size (matching-operand-size dst src)))
1451 (when (eq size :byte)
1452 (error "Double shifts can only be used with words."))
1453 (maybe-emit-operand-size-prefix segment size)
1454 (emit-byte segment #b00001111)
1455 (emit-byte segment (dpb opcode (byte 1 3)
1456 (if (eq amt :cl) #b10100101 #b10100100)))
1458 (emit-ea segment dst src)
1459 (emit-ea segment dst (reg-tn-encoding src)) ; pw tries this
1460 (unless (eq amt :cl)
1461 (emit-byte segment amt))))
1463 (eval-when (:compile-toplevel :execute)
1464 (defun double-shift-inst-printer-list (op)
1466 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
1467 (imm nil :type signed-imm-byte)))
1468 (ext-reg-reg/mem ((op ,(logior op #b101)))
1469 (:name :tab reg/mem ", " 'cl)))))
1471 (define-instruction shld (segment dst src amt)
1472 (:declare (type (or (member :cl) (mod 32)) amt))
1473 (:printer-list (double-shift-inst-printer-list #b10100000))
1475 (emit-double-shift segment #b0 dst src amt)))
1477 (define-instruction shrd (segment dst src amt)
1478 (:declare (type (or (member :cl) (mod 32)) amt))
1479 (:printer-list (double-shift-inst-printer-list #b10101000))
1481 (emit-double-shift segment #b1 dst src amt)))
1483 (define-instruction and (segment dst src)
1485 (arith-inst-printer-list #b100))
1487 (emit-random-arith-inst "AND" segment dst src #b100)))
1489 (define-instruction test (segment this that)
1490 (:printer accum-imm ((op #b1010100)))
1491 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1492 (:printer reg-reg/mem ((op #b1000010)))
1494 (let ((size (matching-operand-size this that)))
1495 (maybe-emit-operand-size-prefix segment size)
1496 (flet ((test-immed-and-something (immed something)
1497 (cond ((accumulator-p something)
1499 (if (eq size :byte) #b10101000 #b10101001))
1500 (emit-sized-immediate segment size immed))
1503 (if (eq size :byte) #b11110110 #b11110111))
1504 (emit-ea segment something #b000)
1505 (emit-sized-immediate segment size immed))))
1506 (test-reg-and-something (reg something)
1507 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1508 (emit-ea segment something (reg-tn-encoding reg))))
1509 (cond ((integerp that)
1510 (test-immed-and-something that this))
1512 (test-immed-and-something this that))
1514 (test-reg-and-something this that))
1516 (test-reg-and-something that this))
1518 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1520 (define-instruction or (segment dst src)
1522 (arith-inst-printer-list #b001))
1524 (emit-random-arith-inst "OR" segment dst src #b001)))
1526 (define-instruction xor (segment dst src)
1528 (arith-inst-printer-list #b110))
1530 (emit-random-arith-inst "XOR" segment dst src #b110)))
1532 (define-instruction not (segment dst)
1533 (:printer reg/mem ((op '(#b1111011 #b010))))
1535 (let ((size (operand-size dst)))
1536 (maybe-emit-operand-size-prefix segment size)
1537 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1538 (emit-ea segment dst #b010))))
1540 ;;;; string manipulation
1542 (define-instruction cmps (segment size)
1543 (:printer string-op ((op #b1010011)))
1545 (maybe-emit-operand-size-prefix segment size)
1546 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1548 (define-instruction ins (segment acc)
1549 (:printer string-op ((op #b0110110)))
1551 (let ((size (operand-size acc)))
1552 (aver (accumulator-p acc))
1553 (maybe-emit-operand-size-prefix segment size)
1554 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1556 (define-instruction lods (segment acc)
1557 (:printer string-op ((op #b1010110)))
1559 (let ((size (operand-size acc)))
1560 (aver (accumulator-p acc))
1561 (maybe-emit-operand-size-prefix segment size)
1562 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1564 (define-instruction movs (segment size)
1565 (:printer string-op ((op #b1010010)))
1567 (maybe-emit-operand-size-prefix segment size)
1568 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1570 (define-instruction outs (segment acc)
1571 (:printer string-op ((op #b0110111)))
1573 (let ((size (operand-size acc)))
1574 (aver (accumulator-p acc))
1575 (maybe-emit-operand-size-prefix segment size)
1576 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1578 (define-instruction scas (segment acc)
1579 (:printer string-op ((op #b1010111)))
1581 (let ((size (operand-size acc)))
1582 (aver (accumulator-p acc))
1583 (maybe-emit-operand-size-prefix segment size)
1584 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1586 (define-instruction stos (segment acc)
1587 (:printer string-op ((op #b1010101)))
1589 (let ((size (operand-size acc)))
1590 (aver (accumulator-p acc))
1591 (maybe-emit-operand-size-prefix segment size)
1592 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1594 (define-instruction xlat (segment)
1595 (:printer byte ((op #b11010111)))
1597 (emit-byte segment #b11010111)))
1599 (define-instruction rep (segment)
1601 (emit-byte segment #b11110010)))
1603 (define-instruction repe (segment)
1604 (:printer byte ((op #b11110011)))
1606 (emit-byte segment #b11110011)))
1608 (define-instruction repne (segment)
1609 (:printer byte ((op #b11110010)))
1611 (emit-byte segment #b11110010)))
1614 ;;;; bit manipulation
1616 (define-instruction bsf (segment dst src)
1617 (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
1619 (let ((size (matching-operand-size dst src)))
1620 (when (eq size :byte)
1621 (error "can't scan bytes: ~S" src))
1622 (maybe-emit-operand-size-prefix segment size)
1623 (emit-byte segment #b00001111)
1624 (emit-byte segment #b10111100)
1625 (emit-ea segment src (reg-tn-encoding dst)))))
1627 (define-instruction bsr (segment dst src)
1628 (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
1630 (let ((size (matching-operand-size dst src)))
1631 (when (eq size :byte)
1632 (error "can't scan bytes: ~S" src))
1633 (maybe-emit-operand-size-prefix segment size)
1634 (emit-byte segment #b00001111)
1635 (emit-byte segment #b10111101)
1636 (emit-ea segment src (reg-tn-encoding dst)))))
1638 (defun emit-bit-test-and-mumble (segment src index opcode)
1639 (let ((size (operand-size src)))
1640 (when (eq size :byte)
1641 (error "can't scan bytes: ~S" src))
1642 (maybe-emit-operand-size-prefix segment size)
1643 (emit-byte segment #b00001111)
1644 (cond ((integerp index)
1645 (emit-byte segment #b10111010)
1646 (emit-ea segment src opcode)
1647 (emit-byte segment index))
1649 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
1650 (emit-ea segment src (reg-tn-encoding index))))))
1652 (eval-when (:compile-toplevel :execute)
1653 (defun bit-test-inst-printer-list (subop)
1654 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
1655 (reg/mem nil :type word-reg/mem)
1656 (imm nil :type imm-data)
1658 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
1660 (:name :tab reg/mem ", " reg)))))
1662 (define-instruction bt (segment src index)
1663 (:printer-list (bit-test-inst-printer-list #b100))
1665 (emit-bit-test-and-mumble segment src index #b100)))
1667 (define-instruction btc (segment src index)
1668 (:printer-list (bit-test-inst-printer-list #b111))
1670 (emit-bit-test-and-mumble segment src index #b111)))
1672 (define-instruction btr (segment src index)
1673 (:printer-list (bit-test-inst-printer-list #b110))
1675 (emit-bit-test-and-mumble segment src index #b110)))
1677 (define-instruction bts (segment src index)
1678 (:printer-list (bit-test-inst-printer-list #b101))
1680 (emit-bit-test-and-mumble segment src index #b101)))
1683 ;;;; control transfer
1685 (define-instruction call (segment where)
1686 (:printer near-jump ((op #b11101000)))
1687 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
1691 (emit-byte segment #b11101000)
1692 (emit-back-patch segment
1694 (lambda (segment posn)
1696 (- (label-position where)
1699 (emit-byte segment #b11101000)
1700 (emit-relative-fixup segment where))
1702 (emit-byte segment #b11111111)
1703 (emit-ea segment where #b010)))))
1705 (defun emit-byte-displacement-backpatch (segment target)
1706 (emit-back-patch segment
1708 (lambda (segment posn)
1709 (let ((disp (- (label-position target) (1+ posn))))
1710 (aver (<= -128 disp 127))
1711 (emit-byte segment disp)))))
1713 (define-instruction jmp (segment cond &optional where)
1714 ;; conditional jumps
1715 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
1716 (:printer near-cond-jump () '('j cc :tab label))
1717 ;; unconditional jumps
1718 (:printer short-jump ((op #b1011)))
1719 (:printer near-jump ((op #b11101001)) )
1720 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
1725 (lambda (segment posn delta-if-after)
1726 (let ((disp (- (label-position where posn delta-if-after)
1728 (when (<= -128 disp 127)
1730 (dpb (conditional-opcode cond)
1733 (emit-byte-displacement-backpatch segment where)
1735 (lambda (segment posn)
1736 (let ((disp (- (label-position where) (+ posn 6))))
1737 (emit-byte segment #b00001111)
1739 (dpb (conditional-opcode cond)
1742 (emit-dword segment disp)))))
1743 ((label-p (setq where cond))
1746 (lambda (segment posn delta-if-after)
1747 (let ((disp (- (label-position where posn delta-if-after)
1749 (when (<= -128 disp 127)
1750 (emit-byte segment #b11101011)
1751 (emit-byte-displacement-backpatch segment where)
1753 (lambda (segment posn)
1754 (let ((disp (- (label-position where) (+ posn 5))))
1755 (emit-byte segment #b11101001)
1756 (emit-dword segment disp)))))
1758 (emit-byte segment #b11101001)
1759 (emit-relative-fixup segment where))
1761 (unless (or (ea-p where) (tn-p where))
1762 (error "don't know what to do with ~A" where))
1763 (emit-byte segment #b11111111)
1764 (emit-ea segment where #b100)))))
1766 (define-instruction jmp-short (segment label)
1768 (emit-byte segment #b11101011)
1769 (emit-byte-displacement-backpatch segment label)))
1771 (define-instruction ret (segment &optional stack-delta)
1772 (:printer byte ((op #b11000011)))
1773 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
1777 (emit-byte segment #b11000010)
1778 (emit-word segment stack-delta))
1780 (emit-byte segment #b11000011)))))
1782 (define-instruction jecxz (segment target)
1783 (:printer short-jump ((op #b0011)))
1785 (emit-byte segment #b11100011)
1786 (emit-byte-displacement-backpatch segment target)))
1788 (define-instruction loop (segment target)
1789 (:printer short-jump ((op #b0010)))
1791 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
1792 (emit-byte-displacement-backpatch segment target)))
1794 (define-instruction loopz (segment target)
1795 (:printer short-jump ((op #b0001)))
1797 (emit-byte segment #b11100001)
1798 (emit-byte-displacement-backpatch segment target)))
1800 (define-instruction loopnz (segment target)
1801 (:printer short-jump ((op #b0000)))
1803 (emit-byte segment #b11100000)
1804 (emit-byte-displacement-backpatch segment target)))
1806 ;;;; conditional move
1807 (define-instruction cmov (segment cond dst src)
1808 (:printer cond-move ())
1810 (aver (register-p dst))
1811 (let ((size (matching-operand-size dst src)))
1812 (aver (or (eq size :word) (eq size :dword)))
1813 (maybe-emit-operand-size-prefix segment size))
1814 (emit-byte segment #b00001111)
1815 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
1816 (emit-ea segment src (reg-tn-encoding dst))))
1818 ;;;; conditional byte set
1820 (define-instruction set (segment dst cond)
1821 (:printer cond-set ())
1823 (emit-byte segment #b00001111)
1824 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
1825 (emit-ea segment dst #b000)))
1829 (define-instruction enter (segment disp &optional (level 0))
1830 (:declare (type (unsigned-byte 16) disp)
1831 (type (unsigned-byte 8) level))
1832 (:printer enter-format ((op #b11001000)))
1834 (emit-byte segment #b11001000)
1835 (emit-word segment disp)
1836 (emit-byte segment level)))
1838 (define-instruction leave (segment)
1839 (:printer byte ((op #b11001001)))
1841 (emit-byte segment #b11001001)))
1843 ;;;; interrupt instructions
1845 (defun snarf-error-junk (sap offset &optional length-only)
1846 (let* ((length (sb!sys:sap-ref-8 sap offset))
1847 (vector (make-array length :element-type '(unsigned-byte 8))))
1848 (declare (type sb!sys:system-area-pointer sap)
1849 (type (unsigned-byte 8) length)
1850 (type (simple-array (unsigned-byte 8) (*)) vector))
1852 (values 0 (1+ length) nil nil))
1854 (sb!kernel:copy-from-system-area sap (* n-byte-bits (1+ offset))
1855 vector (* n-word-bits
1857 (* length n-byte-bits))
1858 (collect ((sc-offsets)
1860 (lengths 1) ; the length byte
1862 (error-number (sb!c:read-var-integer vector index)))
1865 (when (>= index length)
1867 (let ((old-index index))
1868 (sc-offsets (sb!c:read-var-integer vector index))
1869 (lengths (- index old-index))))
1870 (values error-number
1876 (defmacro break-cases (breaknum &body cases)
1877 (let ((bn-temp (gensym)))
1878 (collect ((clauses))
1879 (dolist (case cases)
1880 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
1881 `(let ((,bn-temp ,breaknum))
1882 (cond ,@(clauses))))))
1885 (defun break-control (chunk inst stream dstate)
1886 (declare (ignore inst))
1887 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
1888 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
1889 ;; map has it undefined; and it should be easier to look in the target
1890 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
1891 ;; from first principles whether it's defined in some way that genesis
1893 (case (byte-imm-code chunk dstate)
1896 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1899 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1901 (nt "breakpoint trap"))
1902 (#.pending-interrupt-trap
1903 (nt "pending interrupt trap"))
1906 (#.fun-end-breakpoint-trap
1907 (nt "function end breakpoint trap")))))
1909 (define-instruction break (segment code)
1910 (:declare (type (unsigned-byte 8) code))
1911 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
1912 :control #'break-control)
1914 (emit-byte segment #b11001100)
1915 (emit-byte segment code)))
1917 (define-instruction int (segment number)
1918 (:declare (type (unsigned-byte 8) number))
1919 (:printer byte-imm ((op #b11001101)))
1923 (emit-byte segment #b11001100))
1925 (emit-byte segment #b11001101)
1926 (emit-byte segment number)))))
1928 (define-instruction into (segment)
1929 (:printer byte ((op #b11001110)))
1931 (emit-byte segment #b11001110)))
1933 (define-instruction bound (segment reg bounds)
1935 (let ((size (matching-operand-size reg bounds)))
1936 (when (eq size :byte)
1937 (error "can't bounds-test bytes: ~S" reg))
1938 (maybe-emit-operand-size-prefix segment size)
1939 (emit-byte segment #b01100010)
1940 (emit-ea segment bounds (reg-tn-encoding reg)))))
1942 (define-instruction iret (segment)
1943 (:printer byte ((op #b11001111)))
1945 (emit-byte segment #b11001111)))
1947 ;;;; processor control
1949 (define-instruction hlt (segment)
1950 (:printer byte ((op #b11110100)))
1952 (emit-byte segment #b11110100)))
1954 (define-instruction nop (segment)
1955 (:printer byte ((op #b10010000)))
1957 (emit-byte segment #b10010000)))
1959 (define-instruction wait (segment)
1960 (:printer byte ((op #b10011011)))
1962 (emit-byte segment #b10011011)))
1964 (define-instruction lock (segment)
1965 (:printer byte ((op #b11110000)))
1967 (emit-byte segment #b11110000)))
1969 ;;;; miscellaneous hackery
1971 (define-instruction byte (segment byte)
1973 (emit-byte segment byte)))
1975 (define-instruction word (segment word)
1977 (emit-word segment word)))
1979 (define-instruction dword (segment dword)
1981 (emit-dword segment dword)))
1983 (defun emit-header-data (segment type)
1984 (emit-back-patch segment
1986 (lambda (segment posn)
1990 (component-header-length))
1994 (define-instruction simple-fun-header-word (segment)
1996 (emit-header-data segment simple-fun-header-widetag)))
1998 (define-instruction lra-header-word (segment)
2000 (emit-header-data segment return-pc-header-widetag)))
2002 ;;;; fp instructions
2004 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
2006 ;;;; Note: We treat the single-precision and double-precision variants
2007 ;;;; as separate instructions.
2009 ;;; Load single to st(0).
2010 (define-instruction fld (segment source)
2011 (:printer floating-point ((op '(#b001 #b000))))
2013 (emit-byte segment #b11011001)
2014 (emit-fp-op segment source #b000)))
2016 ;;; Load double to st(0).
2017 (define-instruction fldd (segment source)
2018 (:printer floating-point ((op '(#b101 #b000))))
2019 (:printer floating-point-fp ((op '(#b001 #b000))))
2021 (if (fp-reg-tn-p source)
2022 (emit-byte segment #b11011001)
2023 (emit-byte segment #b11011101))
2024 (emit-fp-op segment source #b000)))
2026 ;;; Load long to st(0).
2027 (define-instruction fldl (segment source)
2028 (:printer floating-point ((op '(#b011 #b101))))
2030 (emit-byte segment #b11011011)
2031 (emit-fp-op segment source #b101)))
2033 ;;; Store single from st(0).
2034 (define-instruction fst (segment dest)
2035 (:printer floating-point ((op '(#b001 #b010))))
2037 (cond ((fp-reg-tn-p dest)
2038 (emit-byte segment #b11011101)
2039 (emit-fp-op segment dest #b010))
2041 (emit-byte segment #b11011001)
2042 (emit-fp-op segment dest #b010)))))
2044 ;;; Store double from st(0).
2045 (define-instruction fstd (segment dest)
2046 (:printer floating-point ((op '(#b101 #b010))))
2047 (:printer floating-point-fp ((op '(#b101 #b010))))
2049 (cond ((fp-reg-tn-p dest)
2050 (emit-byte segment #b11011101)
2051 (emit-fp-op segment dest #b010))
2053 (emit-byte segment #b11011101)
2054 (emit-fp-op segment dest #b010)))))
2056 ;;; Arithmetic ops are all done with at least one operand at top of
2057 ;;; stack. The other operand is is another register or a 32/64 bit
2060 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2061 ;;; that these conflict with the Gdb conventions for binops. To reduce
2062 ;;; the confusion I've added comments showing the mathamatical
2063 ;;; operation and the two syntaxes. By the ASM386 convention the
2064 ;;; instruction syntax is:
2067 ;;; or Fop Destination, Source
2069 ;;; If only one operand is given then it is the source and the
2070 ;;; destination is ST(0). There are reversed forms of the fsub and
2071 ;;; fdiv instructions inducated by an 'R' suffix.
2073 ;;; The mathematical operation for the non-reverse form is always:
2074 ;;; destination = destination op source
2076 ;;; For the reversed form it is:
2077 ;;; destination = source op destination
2079 ;;; The instructions below only accept one operand at present which is
2080 ;;; usually the source. I've hack in extra instructions to implement
2081 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2082 ;;; the operand is the destination with the source being ST(0).
2085 ;;; st(0) = st(0) + memory or st(i).
2086 (define-instruction fadd (segment source)
2087 (:printer floating-point ((op '(#b000 #b000))))
2089 (emit-byte segment #b11011000)
2090 (emit-fp-op segment source #b000)))
2093 ;;; st(0) = st(0) + memory or st(i).
2094 (define-instruction faddd (segment source)
2095 (:printer floating-point ((op '(#b100 #b000))))
2096 (:printer floating-point-fp ((op '(#b000 #b000))))
2098 (if (fp-reg-tn-p source)
2099 (emit-byte segment #b11011000)
2100 (emit-byte segment #b11011100))
2101 (emit-fp-op segment source #b000)))
2103 ;;; Add double destination st(i):
2104 ;;; st(i) = st(0) + st(i).
2105 (define-instruction fadd-sti (segment destination)
2106 (:printer floating-point-fp ((op '(#b100 #b000))))
2108 (aver (fp-reg-tn-p destination))
2109 (emit-byte segment #b11011100)
2110 (emit-fp-op segment destination #b000)))
2112 (define-instruction faddp-sti (segment destination)
2113 (:printer floating-point-fp ((op '(#b110 #b000))))
2115 (aver (fp-reg-tn-p destination))
2116 (emit-byte segment #b11011110)
2117 (emit-fp-op segment destination #b000)))
2119 ;;; Subtract single:
2120 ;;; st(0) = st(0) - memory or st(i).
2121 (define-instruction fsub (segment source)
2122 (:printer floating-point ((op '(#b000 #b100))))
2124 (emit-byte segment #b11011000)
2125 (emit-fp-op segment source #b100)))
2127 ;;; Subtract single, reverse:
2128 ;;; st(0) = memory or st(i) - st(0).
2129 (define-instruction fsubr (segment source)
2130 (:printer floating-point ((op '(#b000 #b101))))
2132 (emit-byte segment #b11011000)
2133 (emit-fp-op segment source #b101)))
2135 ;;; Subtract double:
2136 ;;; st(0) = st(0) - memory or st(i).
2137 (define-instruction fsubd (segment source)
2138 (:printer floating-point ((op '(#b100 #b100))))
2139 (:printer floating-point-fp ((op '(#b000 #b100))))
2141 (if (fp-reg-tn-p source)
2142 (emit-byte segment #b11011000)
2143 (emit-byte segment #b11011100))
2144 (emit-fp-op segment source #b100)))
2146 ;;; Subtract double, reverse:
2147 ;;; st(0) = memory or st(i) - st(0).
2148 (define-instruction fsubrd (segment source)
2149 (:printer floating-point ((op '(#b100 #b101))))
2150 (:printer floating-point-fp ((op '(#b000 #b101))))
2152 (if (fp-reg-tn-p source)
2153 (emit-byte segment #b11011000)
2154 (emit-byte segment #b11011100))
2155 (emit-fp-op segment source #b101)))
2157 ;;; Subtract double, destination st(i):
2158 ;;; st(i) = st(i) - st(0).
2160 ;;; ASM386 syntax: FSUB ST(i), ST
2161 ;;; Gdb syntax: fsubr %st,%st(i)
2162 (define-instruction fsub-sti (segment destination)
2163 (:printer floating-point-fp ((op '(#b100 #b101))))
2165 (aver (fp-reg-tn-p destination))
2166 (emit-byte segment #b11011100)
2167 (emit-fp-op segment destination #b101)))
2169 (define-instruction fsubp-sti (segment destination)
2170 (:printer floating-point-fp ((op '(#b110 #b101))))
2172 (aver (fp-reg-tn-p destination))
2173 (emit-byte segment #b11011110)
2174 (emit-fp-op segment destination #b101)))
2176 ;;; Subtract double, reverse, destination st(i):
2177 ;;; st(i) = st(0) - st(i).
2179 ;;; ASM386 syntax: FSUBR ST(i), ST
2180 ;;; Gdb syntax: fsub %st,%st(i)
2181 (define-instruction fsubr-sti (segment destination)
2182 (:printer floating-point-fp ((op '(#b100 #b100))))
2184 (aver (fp-reg-tn-p destination))
2185 (emit-byte segment #b11011100)
2186 (emit-fp-op segment destination #b100)))
2188 (define-instruction fsubrp-sti (segment destination)
2189 (:printer floating-point-fp ((op '(#b110 #b100))))
2191 (aver (fp-reg-tn-p destination))
2192 (emit-byte segment #b11011110)
2193 (emit-fp-op segment destination #b100)))
2195 ;;; Multiply single:
2196 ;;; st(0) = st(0) * memory or st(i).
2197 (define-instruction fmul (segment source)
2198 (:printer floating-point ((op '(#b000 #b001))))
2200 (emit-byte segment #b11011000)
2201 (emit-fp-op segment source #b001)))
2203 ;;; Multiply double:
2204 ;;; st(0) = st(0) * memory or st(i).
2205 (define-instruction fmuld (segment source)
2206 (:printer floating-point ((op '(#b100 #b001))))
2207 (:printer floating-point-fp ((op '(#b000 #b001))))
2209 (if (fp-reg-tn-p source)
2210 (emit-byte segment #b11011000)
2211 (emit-byte segment #b11011100))
2212 (emit-fp-op segment source #b001)))
2214 ;;; Multiply double, destination st(i):
2215 ;;; st(i) = st(i) * st(0).
2216 (define-instruction fmul-sti (segment destination)
2217 (:printer floating-point-fp ((op '(#b100 #b001))))
2219 (aver (fp-reg-tn-p destination))
2220 (emit-byte segment #b11011100)
2221 (emit-fp-op segment destination #b001)))
2224 ;;; st(0) = st(0) / memory or st(i).
2225 (define-instruction fdiv (segment source)
2226 (:printer floating-point ((op '(#b000 #b110))))
2228 (emit-byte segment #b11011000)
2229 (emit-fp-op segment source #b110)))
2231 ;;; Divide single, reverse:
2232 ;;; st(0) = memory or st(i) / st(0).
2233 (define-instruction fdivr (segment source)
2234 (:printer floating-point ((op '(#b000 #b111))))
2236 (emit-byte segment #b11011000)
2237 (emit-fp-op segment source #b111)))
2240 ;;; st(0) = st(0) / memory or st(i).
2241 (define-instruction fdivd (segment source)
2242 (:printer floating-point ((op '(#b100 #b110))))
2243 (:printer floating-point-fp ((op '(#b000 #b110))))
2245 (if (fp-reg-tn-p source)
2246 (emit-byte segment #b11011000)
2247 (emit-byte segment #b11011100))
2248 (emit-fp-op segment source #b110)))
2250 ;;; Divide double, reverse:
2251 ;;; st(0) = memory or st(i) / st(0).
2252 (define-instruction fdivrd (segment source)
2253 (:printer floating-point ((op '(#b100 #b111))))
2254 (:printer floating-point-fp ((op '(#b000 #b111))))
2256 (if (fp-reg-tn-p source)
2257 (emit-byte segment #b11011000)
2258 (emit-byte segment #b11011100))
2259 (emit-fp-op segment source #b111)))
2261 ;;; Divide double, destination st(i):
2262 ;;; st(i) = st(i) / st(0).
2264 ;;; ASM386 syntax: FDIV ST(i), ST
2265 ;;; Gdb syntax: fdivr %st,%st(i)
2266 (define-instruction fdiv-sti (segment destination)
2267 (:printer floating-point-fp ((op '(#b100 #b111))))
2269 (aver (fp-reg-tn-p destination))
2270 (emit-byte segment #b11011100)
2271 (emit-fp-op segment destination #b111)))
2273 ;;; Divide double, reverse, destination st(i):
2274 ;;; st(i) = st(0) / st(i).
2276 ;;; ASM386 syntax: FDIVR ST(i), ST
2277 ;;; Gdb syntax: fdiv %st,%st(i)
2278 (define-instruction fdivr-sti (segment destination)
2279 (:printer floating-point-fp ((op '(#b100 #b110))))
2281 (aver (fp-reg-tn-p destination))
2282 (emit-byte segment #b11011100)
2283 (emit-fp-op segment destination #b110)))
2285 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2286 (define-instruction fxch (segment source)
2287 (:printer floating-point-fp ((op '(#b001 #b001))))
2289 (unless (and (tn-p source)
2290 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2292 (emit-byte segment #b11011001)
2293 (emit-fp-op segment source #b001)))
2295 ;;; Push 32-bit integer to st0.
2296 (define-instruction fild (segment source)
2297 (:printer floating-point ((op '(#b011 #b000))))
2299 (emit-byte segment #b11011011)
2300 (emit-fp-op segment source #b000)))
2302 ;;; Push 64-bit integer to st0.
2303 (define-instruction fildl (segment source)
2304 (:printer floating-point ((op '(#b111 #b101))))
2306 (emit-byte segment #b11011111)
2307 (emit-fp-op segment source #b101)))
2309 ;;; Store 32-bit integer.
2310 (define-instruction fist (segment dest)
2311 (:printer floating-point ((op '(#b011 #b010))))
2313 (emit-byte segment #b11011011)
2314 (emit-fp-op segment dest #b010)))
2316 ;;; Store and pop 32-bit integer.
2317 (define-instruction fistp (segment dest)
2318 (:printer floating-point ((op '(#b011 #b011))))
2320 (emit-byte segment #b11011011)
2321 (emit-fp-op segment dest #b011)))
2323 ;;; Store and pop 64-bit integer.
2324 (define-instruction fistpl (segment dest)
2325 (:printer floating-point ((op '(#b111 #b111))))
2327 (emit-byte segment #b11011111)
2328 (emit-fp-op segment dest #b111)))
2330 ;;; Store single from st(0) and pop.
2331 (define-instruction fstp (segment dest)
2332 (:printer floating-point ((op '(#b001 #b011))))
2334 (cond ((fp-reg-tn-p dest)
2335 (emit-byte segment #b11011101)
2336 (emit-fp-op segment dest #b011))
2338 (emit-byte segment #b11011001)
2339 (emit-fp-op segment dest #b011)))))
2341 ;;; Store double from st(0) and pop.
2342 (define-instruction fstpd (segment dest)
2343 (:printer floating-point ((op '(#b101 #b011))))
2344 (:printer floating-point-fp ((op '(#b101 #b011))))
2346 (cond ((fp-reg-tn-p dest)
2347 (emit-byte segment #b11011101)
2348 (emit-fp-op segment dest #b011))
2350 (emit-byte segment #b11011101)
2351 (emit-fp-op segment dest #b011)))))
2353 ;;; Store long from st(0) and pop.
2354 (define-instruction fstpl (segment dest)
2355 (:printer floating-point ((op '(#b011 #b111))))
2357 (emit-byte segment #b11011011)
2358 (emit-fp-op segment dest #b111)))
2360 ;;; Decrement stack-top pointer.
2361 (define-instruction fdecstp (segment)
2362 (:printer floating-point-no ((op #b10110)))
2364 (emit-byte segment #b11011001)
2365 (emit-byte segment #b11110110)))
2367 ;;; Increment stack-top pointer.
2368 (define-instruction fincstp (segment)
2369 (:printer floating-point-no ((op #b10111)))
2371 (emit-byte segment #b11011001)
2372 (emit-byte segment #b11110111)))
2374 ;;; Free fp register.
2375 (define-instruction ffree (segment dest)
2376 (:printer floating-point-fp ((op '(#b101 #b000))))
2378 (emit-byte segment #b11011101)
2379 (emit-fp-op segment dest #b000)))
2381 (define-instruction fabs (segment)
2382 (:printer floating-point-no ((op #b00001)))
2384 (emit-byte segment #b11011001)
2385 (emit-byte segment #b11100001)))
2387 (define-instruction fchs (segment)
2388 (:printer floating-point-no ((op #b00000)))
2390 (emit-byte segment #b11011001)
2391 (emit-byte segment #b11100000)))
2393 (define-instruction frndint(segment)
2394 (:printer floating-point-no ((op #b11100)))
2396 (emit-byte segment #b11011001)
2397 (emit-byte segment #b11111100)))
2400 (define-instruction fninit(segment)
2401 (:printer floating-point-5 ((op #b00011)))
2403 (emit-byte segment #b11011011)
2404 (emit-byte segment #b11100011)))
2406 ;;; Store Status Word to AX.
2407 (define-instruction fnstsw(segment)
2408 (:printer floating-point-st ((op #b00000)))
2410 (emit-byte segment #b11011111)
2411 (emit-byte segment #b11100000)))
2413 ;;; Load Control Word.
2415 ;;; src must be a memory location
2416 (define-instruction fldcw(segment src)
2417 (:printer floating-point ((op '(#b001 #b101))))
2419 (emit-byte segment #b11011001)
2420 (emit-fp-op segment src #b101)))
2422 ;;; Store Control Word.
2423 (define-instruction fnstcw(segment dst)
2424 (:printer floating-point ((op '(#b001 #b111))))
2426 (emit-byte segment #b11011001)
2427 (emit-fp-op segment dst #b111)))
2429 ;;; Store FP Environment.
2430 (define-instruction fstenv(segment dst)
2431 (:printer floating-point ((op '(#b001 #b110))))
2433 (emit-byte segment #b11011001)
2434 (emit-fp-op segment dst #b110)))
2436 ;;; Restore FP Environment.
2437 (define-instruction fldenv(segment src)
2438 (:printer floating-point ((op '(#b001 #b100))))
2440 (emit-byte segment #b11011001)
2441 (emit-fp-op segment src #b100)))
2444 (define-instruction fsave(segment dst)
2445 (:printer floating-point ((op '(#b101 #b110))))
2447 (emit-byte segment #b11011101)
2448 (emit-fp-op segment dst #b110)))
2450 ;;; Restore FP State.
2451 (define-instruction frstor(segment src)
2452 (:printer floating-point ((op '(#b101 #b100))))
2454 (emit-byte segment #b11011101)
2455 (emit-fp-op segment src #b100)))
2457 ;;; Clear exceptions.
2458 (define-instruction fnclex(segment)
2459 (:printer floating-point-5 ((op #b00010)))
2461 (emit-byte segment #b11011011)
2462 (emit-byte segment #b11100010)))
2465 (define-instruction fcom (segment src)
2466 (:printer floating-point ((op '(#b000 #b010))))
2468 (emit-byte segment #b11011000)
2469 (emit-fp-op segment src #b010)))
2471 (define-instruction fcomd (segment src)
2472 (:printer floating-point ((op '(#b100 #b010))))
2473 (:printer floating-point-fp ((op '(#b000 #b010))))
2475 (if (fp-reg-tn-p src)
2476 (emit-byte segment #b11011000)
2477 (emit-byte segment #b11011100))
2478 (emit-fp-op segment src #b010)))
2480 ;;; Compare ST1 to ST0, popping the stack twice.
2481 (define-instruction fcompp (segment)
2482 (:printer floating-point-3 ((op '(#b110 #b011001))))
2484 (emit-byte segment #b11011110)
2485 (emit-byte segment #b11011001)))
2487 ;;; unordered comparison
2488 (define-instruction fucom (segment src)
2489 (:printer floating-point-fp ((op '(#b101 #b100))))
2491 (aver (fp-reg-tn-p src))
2492 (emit-byte segment #b11011101)
2493 (emit-fp-op segment src #b100)))
2495 (define-instruction ftst (segment)
2496 (:printer floating-point-no ((op #b00100)))
2498 (emit-byte segment #b11011001)
2499 (emit-byte segment #b11100100)))
2503 (define-instruction fsqrt(segment)
2504 (:printer floating-point-no ((op #b11010)))
2506 (emit-byte segment #b11011001)
2507 (emit-byte segment #b11111010)))
2509 (define-instruction fscale(segment)
2510 (:printer floating-point-no ((op #b11101)))
2512 (emit-byte segment #b11011001)
2513 (emit-byte segment #b11111101)))
2515 (define-instruction fxtract(segment)
2516 (:printer floating-point-no ((op #b10100)))
2518 (emit-byte segment #b11011001)
2519 (emit-byte segment #b11110100)))
2521 (define-instruction fsin(segment)
2522 (:printer floating-point-no ((op #b11110)))
2524 (emit-byte segment #b11011001)
2525 (emit-byte segment #b11111110)))
2527 (define-instruction fcos(segment)
2528 (:printer floating-point-no ((op #b11111)))
2530 (emit-byte segment #b11011001)
2531 (emit-byte segment #b11111111)))
2533 (define-instruction fprem1(segment)
2534 (:printer floating-point-no ((op #b10101)))
2536 (emit-byte segment #b11011001)
2537 (emit-byte segment #b11110101)))
2539 (define-instruction fprem(segment)
2540 (:printer floating-point-no ((op #b11000)))
2542 (emit-byte segment #b11011001)
2543 (emit-byte segment #b11111000)))
2545 (define-instruction fxam (segment)
2546 (:printer floating-point-no ((op #b00101)))
2548 (emit-byte segment #b11011001)
2549 (emit-byte segment #b11100101)))
2551 ;;; These do push/pop to stack and need special handling
2552 ;;; in any VOPs that use them. See the book.
2554 ;;; st0 <- st1*log2(st0)
2555 (define-instruction fyl2x(segment) ; pops stack
2556 (:printer floating-point-no ((op #b10001)))
2558 (emit-byte segment #b11011001)
2559 (emit-byte segment #b11110001)))
2561 (define-instruction fyl2xp1(segment)
2562 (:printer floating-point-no ((op #b11001)))
2564 (emit-byte segment #b11011001)
2565 (emit-byte segment #b11111001)))
2567 (define-instruction f2xm1(segment)
2568 (:printer floating-point-no ((op #b10000)))
2570 (emit-byte segment #b11011001)
2571 (emit-byte segment #b11110000)))
2573 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
2574 (:printer floating-point-no ((op #b10010)))
2576 (emit-byte segment #b11011001)
2577 (emit-byte segment #b11110010)))
2579 (define-instruction fpatan(segment) ; POPS STACK
2580 (:printer floating-point-no ((op #b10011)))
2582 (emit-byte segment #b11011001)
2583 (emit-byte segment #b11110011)))
2585 ;;;; loading constants
2587 (define-instruction fldz(segment)
2588 (:printer floating-point-no ((op #b01110)))
2590 (emit-byte segment #b11011001)
2591 (emit-byte segment #b11101110)))
2593 (define-instruction fld1(segment)
2594 (:printer floating-point-no ((op #b01000)))
2596 (emit-byte segment #b11011001)
2597 (emit-byte segment #b11101000)))
2599 (define-instruction fldpi(segment)
2600 (:printer floating-point-no ((op #b01011)))
2602 (emit-byte segment #b11011001)
2603 (emit-byte segment #b11101011)))
2605 (define-instruction fldl2t(segment)
2606 (:printer floating-point-no ((op #b01001)))
2608 (emit-byte segment #b11011001)
2609 (emit-byte segment #b11101001)))
2611 (define-instruction fldl2e(segment)
2612 (:printer floating-point-no ((op #b01010)))
2614 (emit-byte segment #b11011001)
2615 (emit-byte segment #b11101010)))
2617 (define-instruction fldlg2(segment)
2618 (:printer floating-point-no ((op #b01100)))
2620 (emit-byte segment #b11011001)
2621 (emit-byte segment #b11101100)))
2623 (define-instruction fldln2(segment)
2624 (:printer floating-point-no ((op #b01101)))
2626 (emit-byte segment #b11011001)
2627 (emit-byte segment #b11101101)))