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 (sb!disassem:define-instruction-format (prefetch 24
620 '(:name ", " reg/mem))
621 (prefix :field (byte 8 0) :value #b00001111)
622 (op :field (byte 8 8) :value #b00011000)
623 (reg/mem :fields (list (byte 2 22) (byte 3 16)) :type 'byte-reg/mem)
624 (reg :field (byte 3 19) :type 'reg))
626 ;;; Single byte instruction with an immediate byte argument.
627 (sb!disassem:define-instruction-format (byte-imm 16
628 :default-printer '(:name :tab code))
629 (op :field (byte 8 0))
630 (code :field (byte 8 8)))
632 ;;; Two byte instruction with an immediate byte argument.
634 (sb!disassem:define-instruction-format (word-imm 24
635 :default-printer '(:name :tab code))
636 (op :field (byte 16 0))
637 (code :field (byte 8 16)))
640 ;;;; primitive emitters
642 (define-bitfield-emitter emit-word 16
645 (define-bitfield-emitter emit-dword 32
648 (define-bitfield-emitter emit-byte-with-reg 8
649 (byte 5 3) (byte 3 0))
651 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
652 (byte 2 6) (byte 3 3) (byte 3 0))
654 (define-bitfield-emitter emit-sib-byte 8
655 (byte 2 6) (byte 3 3) (byte 3 0))
659 (defun emit-absolute-fixup (segment fixup)
660 (note-fixup segment :absolute fixup)
661 (let ((offset (fixup-offset fixup)))
663 (emit-back-patch segment
664 4 ; FIXME: n-word-bytes
665 (lambda (segment posn)
666 (declare (ignore posn))
668 (- (+ (component-header-length)
669 (or (label-position offset)
671 other-pointer-lowtag))))
672 (emit-dword segment (or offset 0)))))
674 (defun emit-relative-fixup (segment fixup)
675 (note-fixup segment :relative fixup)
676 (emit-dword segment (or (fixup-offset fixup) 0)))
678 ;;;; the effective-address (ea) structure
680 (defun reg-tn-encoding (tn)
681 (declare (type tn tn))
682 (aver (eq (sb-name (sc-sb (tn-sc tn))) 'registers))
683 (let ((offset (tn-offset tn)))
684 (logior (ash (logand offset 1) 2)
687 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
689 (size nil :type (member :byte :word :dword))
690 (base nil :type (or tn null))
691 (index nil :type (or tn null))
692 (scale 1 :type (member 1 2 4 8))
693 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
694 (def!method print-object ((ea ea) stream)
695 (cond ((or *print-escape* *print-readably*)
696 (print-unreadable-object (ea stream :type t)
698 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
702 (let ((scale (ea-scale ea)))
703 (if (= scale 1) nil scale))
706 (format stream "~A PTR [" (symbol-name (ea-size ea)))
708 (write-string (sb!c::location-print-name (ea-base ea)) stream)
710 (write-string "+" stream)))
712 (write-string (sb!c::location-print-name (ea-index ea)) stream))
713 (unless (= (ea-scale ea) 1)
714 (format stream "*~A" (ea-scale ea)))
715 (typecase (ea-disp ea)
718 (format stream "~@D" (ea-disp ea)))
720 (format stream "+~A" (ea-disp ea))))
721 (write-char #\] stream))))
723 (defun emit-ea (segment thing reg &optional allow-constants)
726 (ecase (sb-name (sc-sb (tn-sc thing)))
728 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
730 ;; Convert stack tns into an index off of EBP.
731 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
732 (cond ((<= -128 disp 127)
733 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
734 (emit-byte segment disp))
736 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
737 (emit-dword segment disp)))))
739 (unless allow-constants
741 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
742 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
743 (emit-absolute-fixup segment
746 (- (* (tn-offset thing) n-word-bytes)
747 other-pointer-lowtag))))))
749 (let* ((base (ea-base thing))
750 (index (ea-index thing))
751 (scale (ea-scale thing))
752 (disp (ea-disp thing))
753 (mod (cond ((or (null base)
755 (not (= (reg-tn-encoding base) #b101))))
757 ((and (fixnump disp) (<= -128 disp 127))
761 (r/m (cond (index #b100)
763 (t (reg-tn-encoding base)))))
764 (emit-mod-reg-r/m-byte segment mod reg r/m)
766 (let ((ss (1- (integer-length scale)))
767 (index (if (null index)
769 (let ((index (reg-tn-encoding index)))
771 (error "can't index off of ESP")
773 (base (if (null base)
775 (reg-tn-encoding base))))
776 (emit-sib-byte segment ss index base)))
778 (emit-byte segment disp))
779 ((or (= mod #b10) (null base))
781 (emit-absolute-fixup segment disp)
782 (emit-dword segment disp))))))
784 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
785 (emit-absolute-fixup segment thing))))
787 (defun fp-reg-tn-p (thing)
789 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
791 ;;; like the above, but for fp-instructions--jrd
792 (defun emit-fp-op (segment thing op)
793 (if (fp-reg-tn-p thing)
794 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
797 (emit-ea segment thing op)))
799 (defun byte-reg-p (thing)
801 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
802 (member (sc-name (tn-sc thing)) *byte-sc-names*)
805 (defun byte-ea-p (thing)
807 (ea (eq (ea-size thing) :byte))
809 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
812 (defun word-reg-p (thing)
814 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
815 (member (sc-name (tn-sc thing)) *word-sc-names*)
818 (defun word-ea-p (thing)
820 (ea (eq (ea-size thing) :word))
821 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
824 (defun dword-reg-p (thing)
826 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
827 (member (sc-name (tn-sc thing)) *dword-sc-names*)
830 (defun dword-ea-p (thing)
832 (ea (eq (ea-size thing) :dword))
834 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
837 (defun register-p (thing)
839 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
841 (defun accumulator-p (thing)
842 (and (register-p thing)
843 (= (tn-offset thing) 0)))
847 (def!constant +operand-size-prefix-byte+ #b01100110)
849 (defun maybe-emit-operand-size-prefix (segment size)
850 (unless (or (eq size :byte) (eq size +default-operand-size+))
851 (emit-byte segment +operand-size-prefix-byte+)))
853 (defun operand-size (thing)
856 ;; FIXME: might as well be COND instead of having to use #. readmacro
857 ;; to hack up the code
858 (case (sc-name (tn-sc thing))
865 ;; added by jrd: float-registers is a separate size (?)
871 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
877 (defun matching-operand-size (dst src)
878 (let ((dst-size (operand-size dst))
879 (src-size (operand-size src)))
882 (if (eq dst-size src-size)
884 (error "size mismatch: ~S is a ~S and ~S is a ~S."
885 dst dst-size src src-size))
889 (error "can't tell the size of either ~S or ~S" dst src)))))
891 (defun emit-sized-immediate (segment size value)
894 (emit-byte segment value))
896 (emit-word segment value))
898 (emit-dword segment value))))
900 ;;;; general data transfer
902 (define-instruction mov (segment dst src)
903 ;; immediate to register
904 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
905 '(:name :tab reg ", " imm))
906 ;; absolute mem to/from accumulator
907 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
908 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
909 ;; register to/from register/memory
910 (:printer reg-reg/mem-dir ((op #b100010)))
911 ;; immediate to register/memory
912 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
915 (let ((size (matching-operand-size dst src)))
916 (maybe-emit-operand-size-prefix segment size)
917 (cond ((register-p dst)
918 (cond ((integerp src)
919 (emit-byte-with-reg segment
923 (reg-tn-encoding dst))
924 (emit-sized-immediate segment size src))
925 ((and (fixup-p src) (accumulator-p dst))
930 (emit-absolute-fixup segment src))
936 (emit-ea segment src (reg-tn-encoding dst) t))))
937 ((and (fixup-p dst) (accumulator-p src))
938 (emit-byte segment (if (eq size :byte) #b10100010 #b10100011))
939 (emit-absolute-fixup segment dst))
941 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
942 (emit-ea segment dst #b000)
943 (emit-sized-immediate segment size src))
945 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
946 (emit-ea segment dst (reg-tn-encoding src)))
948 (aver (eq size :dword))
949 (emit-byte segment #b11000111)
950 (emit-ea segment dst #b000)
951 (emit-absolute-fixup segment src))
953 (error "bogus arguments to MOV: ~S ~S" dst src))))))
955 (defun emit-move-with-extension (segment dst src opcode)
956 (aver (register-p dst))
957 (let ((dst-size (operand-size dst))
958 (src-size (operand-size src)))
961 (aver (eq src-size :byte))
962 (maybe-emit-operand-size-prefix segment :word)
963 (emit-byte segment #b00001111)
964 (emit-byte segment opcode)
965 (emit-ea segment src (reg-tn-encoding dst)))
969 (maybe-emit-operand-size-prefix segment :dword)
970 (emit-byte segment #b00001111)
971 (emit-byte segment opcode)
972 (emit-ea segment src (reg-tn-encoding dst)))
974 (emit-byte segment #b00001111)
975 (emit-byte segment (logior opcode 1))
976 (emit-ea segment src (reg-tn-encoding dst))))))))
978 (define-instruction movsx (segment dst src)
979 (:printer ext-reg-reg/mem ((op #b1011111) (reg nil :type 'word-reg)))
980 (:emitter (emit-move-with-extension segment dst src #b10111110)))
982 (define-instruction movzx (segment dst src)
983 (:printer ext-reg-reg/mem ((op #b1011011) (reg nil :type 'word-reg)))
984 (:emitter (emit-move-with-extension segment dst src #b10110110)))
986 (define-instruction push (segment src)
988 (:printer reg-no-width ((op #b01010)))
990 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
992 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
994 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
996 ;; ### segment registers?
999 (cond ((integerp src)
1000 (cond ((<= -128 src 127)
1001 (emit-byte segment #b01101010)
1002 (emit-byte segment src))
1004 (emit-byte segment #b01101000)
1005 (emit-dword segment src))))
1007 ;; Interpret the fixup as an immediate dword to push.
1008 (emit-byte segment #b01101000)
1009 (emit-absolute-fixup segment src))
1011 (let ((size (operand-size src)))
1012 (aver (not (eq size :byte)))
1013 (maybe-emit-operand-size-prefix segment size)
1014 (cond ((register-p src)
1015 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1017 (emit-byte segment #b11111111)
1018 (emit-ea segment src #b110 t))))))))
1020 (define-instruction pusha (segment)
1021 (:printer byte ((op #b01100000)))
1023 (emit-byte segment #b01100000)))
1025 (define-instruction pop (segment dst)
1026 (:printer reg-no-width ((op #b01011)))
1027 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
1029 (let ((size (operand-size dst)))
1030 (aver (not (eq size :byte)))
1031 (maybe-emit-operand-size-prefix segment size)
1032 (cond ((register-p dst)
1033 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1035 (emit-byte segment #b10001111)
1036 (emit-ea segment dst #b000))))))
1038 (define-instruction popa (segment)
1039 (:printer byte ((op #b01100001)))
1041 (emit-byte segment #b01100001)))
1043 (define-instruction xchg (segment operand1 operand2)
1044 ;; Register with accumulator.
1045 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1046 ;; Register/Memory with Register.
1047 (:printer reg-reg/mem ((op #b1000011)))
1049 (let ((size (matching-operand-size operand1 operand2)))
1050 (maybe-emit-operand-size-prefix segment size)
1051 (labels ((xchg-acc-with-something (acc something)
1052 (if (and (not (eq size :byte)) (register-p something))
1053 (emit-byte-with-reg segment
1055 (reg-tn-encoding something))
1056 (xchg-reg-with-something acc something)))
1057 (xchg-reg-with-something (reg something)
1058 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1059 (emit-ea segment something (reg-tn-encoding reg))))
1060 (cond ((accumulator-p operand1)
1061 (xchg-acc-with-something operand1 operand2))
1062 ((accumulator-p operand2)
1063 (xchg-acc-with-something operand2 operand1))
1064 ((register-p operand1)
1065 (xchg-reg-with-something operand1 operand2))
1066 ((register-p operand2)
1067 (xchg-reg-with-something operand2 operand1))
1069 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1071 (define-instruction lea (segment dst src)
1072 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1074 (aver (dword-reg-p dst))
1075 (emit-byte segment #b10001101)
1076 (emit-ea segment src (reg-tn-encoding dst))))
1078 (define-instruction cmpxchg (segment dst src)
1079 ;; Register/Memory with Register.
1080 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1082 (aver (register-p src))
1083 (let ((size (matching-operand-size src dst)))
1084 (maybe-emit-operand-size-prefix segment size)
1085 (emit-byte segment #b00001111)
1086 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1087 (emit-ea segment dst (reg-tn-encoding src)))))
1091 (define-instruction fs-segment-prefix (segment)
1093 (emit-byte segment #x64)))
1095 ;;;; flag control instructions
1097 ;;; CLC -- Clear Carry Flag.
1098 (define-instruction clc (segment)
1099 (:printer byte ((op #b11111000)))
1101 (emit-byte segment #b11111000)))
1103 ;;; CLD -- Clear Direction Flag.
1104 (define-instruction cld (segment)
1105 (:printer byte ((op #b11111100)))
1107 (emit-byte segment #b11111100)))
1109 ;;; CLI -- Clear Iterrupt Enable Flag.
1110 (define-instruction cli (segment)
1111 (:printer byte ((op #b11111010)))
1113 (emit-byte segment #b11111010)))
1115 ;;; CMC -- Complement Carry Flag.
1116 (define-instruction cmc (segment)
1117 (:printer byte ((op #b11110101)))
1119 (emit-byte segment #b11110101)))
1121 ;;; LAHF -- Load AH into flags.
1122 (define-instruction lahf (segment)
1123 (:printer byte ((op #b10011111)))
1125 (emit-byte segment #b10011111)))
1127 ;;; POPF -- Pop flags.
1128 (define-instruction popf (segment)
1129 (:printer byte ((op #b10011101)))
1131 (emit-byte segment #b10011101)))
1133 ;;; PUSHF -- push flags.
1134 (define-instruction pushf (segment)
1135 (:printer byte ((op #b10011100)))
1137 (emit-byte segment #b10011100)))
1139 ;;; SAHF -- Store AH into flags.
1140 (define-instruction sahf (segment)
1141 (:printer byte ((op #b10011110)))
1143 (emit-byte segment #b10011110)))
1145 ;;; STC -- Set Carry Flag.
1146 (define-instruction stc (segment)
1147 (:printer byte ((op #b11111001)))
1149 (emit-byte segment #b11111001)))
1151 ;;; STD -- Set Direction Flag.
1152 (define-instruction std (segment)
1153 (:printer byte ((op #b11111101)))
1155 (emit-byte segment #b11111101)))
1157 ;;; STI -- Set Interrupt Enable Flag.
1158 (define-instruction sti (segment)
1159 (:printer byte ((op #b11111011)))
1161 (emit-byte segment #b11111011)))
1165 (defun emit-random-arith-inst (name segment dst src opcode
1166 &optional allow-constants)
1167 (let ((size (matching-operand-size dst src)))
1168 (maybe-emit-operand-size-prefix segment size)
1171 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1172 (emit-byte segment #b10000011)
1173 (emit-ea segment dst opcode allow-constants)
1174 (emit-byte segment src))
1175 ((accumulator-p dst)
1182 (emit-sized-immediate segment size src))
1184 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1185 (emit-ea segment dst opcode allow-constants)
1186 (emit-sized-immediate segment size src))))
1191 (if (eq size :byte) #b00000000 #b00000001)))
1192 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1197 (if (eq size :byte) #b00000010 #b00000011)))
1198 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1200 (error "bogus operands to ~A" name)))))
1202 (eval-when (:compile-toplevel :execute)
1203 (defun arith-inst-printer-list (subop)
1204 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1205 (reg/mem-imm ((op (#b1000000 ,subop))))
1206 (reg/mem-imm ((op (#b1000001 ,subop))
1207 (imm nil :type signed-imm-byte)))
1208 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1211 (define-instruction add (segment dst src)
1212 (:printer-list (arith-inst-printer-list #b000))
1213 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1215 (define-instruction adc (segment dst src)
1216 (:printer-list (arith-inst-printer-list #b010))
1217 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1219 (define-instruction sub (segment dst src)
1220 (:printer-list (arith-inst-printer-list #b101))
1221 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1223 (define-instruction sbb (segment dst src)
1224 (:printer-list (arith-inst-printer-list #b011))
1225 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1227 (define-instruction cmp (segment dst src)
1228 (:printer-list (arith-inst-printer-list #b111))
1229 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1231 (define-instruction inc (segment dst)
1233 (:printer reg-no-width ((op #b01000)))
1235 (:printer reg/mem ((op '(#b1111111 #b000))))
1237 (let ((size (operand-size dst)))
1238 (maybe-emit-operand-size-prefix segment size)
1239 (cond ((and (not (eq size :byte)) (register-p dst))
1240 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1242 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1243 (emit-ea segment dst #b000))))))
1245 (define-instruction dec (segment dst)
1247 (:printer reg-no-width ((op #b01001)))
1249 (:printer reg/mem ((op '(#b1111111 #b001))))
1251 (let ((size (operand-size dst)))
1252 (maybe-emit-operand-size-prefix segment size)
1253 (cond ((and (not (eq size :byte)) (register-p dst))
1254 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1256 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1257 (emit-ea segment dst #b001))))))
1259 (define-instruction neg (segment dst)
1260 (:printer reg/mem ((op '(#b1111011 #b011))))
1262 (let ((size (operand-size dst)))
1263 (maybe-emit-operand-size-prefix segment size)
1264 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1265 (emit-ea segment dst #b011))))
1267 (define-instruction aaa (segment)
1268 (:printer byte ((op #b00110111)))
1270 (emit-byte segment #b00110111)))
1272 (define-instruction aas (segment)
1273 (:printer byte ((op #b00111111)))
1275 (emit-byte segment #b00111111)))
1277 (define-instruction daa (segment)
1278 (:printer byte ((op #b00100111)))
1280 (emit-byte segment #b00100111)))
1282 (define-instruction das (segment)
1283 (:printer byte ((op #b00101111)))
1285 (emit-byte segment #b00101111)))
1287 (define-instruction mul (segment dst src)
1288 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1290 (let ((size (matching-operand-size dst src)))
1291 (aver (accumulator-p dst))
1292 (maybe-emit-operand-size-prefix segment size)
1293 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1294 (emit-ea segment src #b100))))
1296 (define-instruction imul (segment dst &optional src1 src2)
1297 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1298 (:printer ext-reg-reg/mem ((op #b1010111)))
1299 (:printer reg-reg/mem ((op #b0110100) (width 1)
1300 (imm nil :type 'signed-imm-word))
1301 '(:name :tab reg ", " reg/mem ", " imm))
1302 (:printer reg-reg/mem ((op #b0110101) (width 1)
1303 (imm nil :type 'signed-imm-byte))
1304 '(:name :tab reg ", " reg/mem ", " imm))
1306 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1307 (let* ((size (matching-operand-size reg r/m))
1308 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1309 (maybe-emit-operand-size-prefix segment size)
1310 (emit-byte segment (if sx #b01101011 #b01101001))
1311 (emit-ea segment r/m (reg-tn-encoding reg))
1313 (emit-byte segment immed)
1314 (emit-sized-immediate segment size immed)))))
1316 (r/m-with-immed-to-reg dst src1 src2))
1319 (r/m-with-immed-to-reg dst dst src1)
1320 (let ((size (matching-operand-size dst src1)))
1321 (maybe-emit-operand-size-prefix segment size)
1322 (emit-byte segment #b00001111)
1323 (emit-byte segment #b10101111)
1324 (emit-ea segment src1 (reg-tn-encoding dst)))))
1326 (let ((size (operand-size dst)))
1327 (maybe-emit-operand-size-prefix segment size)
1328 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1329 (emit-ea segment dst #b101)))))))
1331 (define-instruction div (segment dst src)
1332 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1334 (let ((size (matching-operand-size dst src)))
1335 (aver (accumulator-p dst))
1336 (maybe-emit-operand-size-prefix segment size)
1337 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1338 (emit-ea segment src #b110))))
1340 (define-instruction idiv (segment dst src)
1341 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1343 (let ((size (matching-operand-size dst src)))
1344 (aver (accumulator-p dst))
1345 (maybe-emit-operand-size-prefix segment size)
1346 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1347 (emit-ea segment src #b111))))
1349 (define-instruction aad (segment)
1350 (:printer two-bytes ((op '(#b11010101 #b00001010))))
1352 (emit-byte segment #b11010101)
1353 (emit-byte segment #b00001010)))
1355 (define-instruction aam (segment)
1356 (:printer two-bytes ((op '(#b11010100 #b00001010))))
1358 (emit-byte segment #b11010100)
1359 (emit-byte segment #b00001010)))
1361 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1362 (define-instruction cbw (segment)
1364 (maybe-emit-operand-size-prefix segment :word)
1365 (emit-byte segment #b10011000)))
1367 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1368 (define-instruction cwde (segment)
1370 (maybe-emit-operand-size-prefix segment :dword)
1371 (emit-byte segment #b10011000)))
1373 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1374 (define-instruction cwd (segment)
1376 (maybe-emit-operand-size-prefix segment :word)
1377 (emit-byte segment #b10011001)))
1379 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1380 (define-instruction cdq (segment)
1381 (:printer byte ((op #b10011001)))
1383 (maybe-emit-operand-size-prefix segment :dword)
1384 (emit-byte segment #b10011001)))
1386 (define-instruction xadd (segment dst src)
1387 ;; Register/Memory with Register.
1388 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1390 (aver (register-p src))
1391 (let ((size (matching-operand-size src dst)))
1392 (maybe-emit-operand-size-prefix segment size)
1393 (emit-byte segment #b00001111)
1394 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1395 (emit-ea segment dst (reg-tn-encoding src)))))
1400 (defun emit-shift-inst (segment dst amount opcode)
1401 (let ((size (operand-size dst)))
1402 (maybe-emit-operand-size-prefix segment size)
1403 (multiple-value-bind (major-opcode immed)
1405 (:cl (values #b11010010 nil))
1406 (1 (values #b11010000 nil))
1407 (t (values #b11000000 t)))
1409 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1410 (emit-ea segment dst opcode)
1412 (emit-byte segment amount)))))
1414 (eval-when (:compile-toplevel :execute)
1415 (defun shift-inst-printer-list (subop)
1416 `((reg/mem ((op (#b1101000 ,subop)))
1417 (:name :tab reg/mem ", 1"))
1418 (reg/mem ((op (#b1101001 ,subop)))
1419 (:name :tab reg/mem ", " 'cl))
1420 (reg/mem-imm ((op (#b1100000 ,subop))
1421 (imm nil :type signed-imm-byte))))))
1423 (define-instruction rol (segment dst amount)
1425 (shift-inst-printer-list #b000))
1427 (emit-shift-inst segment dst amount #b000)))
1429 (define-instruction ror (segment dst amount)
1431 (shift-inst-printer-list #b001))
1433 (emit-shift-inst segment dst amount #b001)))
1435 (define-instruction rcl (segment dst amount)
1437 (shift-inst-printer-list #b010))
1439 (emit-shift-inst segment dst amount #b010)))
1441 (define-instruction rcr (segment dst amount)
1443 (shift-inst-printer-list #b011))
1445 (emit-shift-inst segment dst amount #b011)))
1447 (define-instruction shl (segment dst amount)
1449 (shift-inst-printer-list #b100))
1451 (emit-shift-inst segment dst amount #b100)))
1453 (define-instruction shr (segment dst amount)
1455 (shift-inst-printer-list #b101))
1457 (emit-shift-inst segment dst amount #b101)))
1459 (define-instruction sar (segment dst amount)
1461 (shift-inst-printer-list #b111))
1463 (emit-shift-inst segment dst amount #b111)))
1465 (defun emit-double-shift (segment opcode dst src amt)
1466 (let ((size (matching-operand-size dst src)))
1467 (when (eq size :byte)
1468 (error "Double shifts can only be used with words."))
1469 (maybe-emit-operand-size-prefix segment size)
1470 (emit-byte segment #b00001111)
1471 (emit-byte segment (dpb opcode (byte 1 3)
1472 (if (eq amt :cl) #b10100101 #b10100100)))
1474 (emit-ea segment dst src)
1475 (emit-ea segment dst (reg-tn-encoding src)) ; pw tries this
1476 (unless (eq amt :cl)
1477 (emit-byte segment amt))))
1479 (eval-when (:compile-toplevel :execute)
1480 (defun double-shift-inst-printer-list (op)
1482 (ext-reg-reg/mem-imm ((op ,(logior op #b10))
1483 (imm nil :type signed-imm-byte)))
1484 (ext-reg-reg/mem ((op ,(logior op #b10)))
1485 (:name :tab reg/mem ", " reg ", " 'cl)))))
1487 (define-instruction shld (segment dst src amt)
1488 (:declare (type (or (member :cl) (mod 32)) amt))
1489 (:printer-list (double-shift-inst-printer-list #b1010000))
1491 (emit-double-shift segment #b0 dst src amt)))
1493 (define-instruction shrd (segment dst src amt)
1494 (:declare (type (or (member :cl) (mod 32)) amt))
1495 (:printer-list (double-shift-inst-printer-list #b1010100))
1497 (emit-double-shift segment #b1 dst src amt)))
1499 (define-instruction and (segment dst src)
1501 (arith-inst-printer-list #b100))
1503 (emit-random-arith-inst "AND" segment dst src #b100)))
1505 (define-instruction test (segment this that)
1506 (:printer accum-imm ((op #b1010100)))
1507 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1508 (:printer reg-reg/mem ((op #b1000010)))
1510 (let ((size (matching-operand-size this that)))
1511 (maybe-emit-operand-size-prefix segment size)
1512 (flet ((test-immed-and-something (immed something)
1513 (cond ((accumulator-p something)
1515 (if (eq size :byte) #b10101000 #b10101001))
1516 (emit-sized-immediate segment size immed))
1519 (if (eq size :byte) #b11110110 #b11110111))
1520 (emit-ea segment something #b000)
1521 (emit-sized-immediate segment size immed))))
1522 (test-reg-and-something (reg something)
1523 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1524 (emit-ea segment something (reg-tn-encoding reg))))
1525 (cond ((integerp that)
1526 (test-immed-and-something that this))
1528 (test-immed-and-something this that))
1530 (test-reg-and-something this that))
1532 (test-reg-and-something that this))
1534 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1536 ;;; Emit the most compact form of the test immediate instruction,
1537 ;;; using an 8 bit test when the immediate is only 8 bits and the
1538 ;;; value is one of the four low registers (eax, ebx, ecx, edx) or the
1540 (defun emit-optimized-test-inst (x y)
1543 (let ((offset (tn-offset x)))
1544 (cond ((and (sc-is x any-reg descriptor-reg)
1545 (or (= offset eax-offset) (= offset ebx-offset)
1546 (= offset ecx-offset) (= offset edx-offset)))
1547 (inst test (make-random-tn :kind :normal
1548 :sc (sc-or-lose 'byte-reg)
1551 ((sc-is x control-stack)
1552 (inst test (make-ea :byte :base ebp-tn
1553 :disp (- (* (1+ offset) n-word-bytes)))
1560 (define-instruction or (segment dst src)
1562 (arith-inst-printer-list #b001))
1564 (emit-random-arith-inst "OR" segment dst src #b001)))
1566 (define-instruction xor (segment dst src)
1568 (arith-inst-printer-list #b110))
1570 (emit-random-arith-inst "XOR" segment dst src #b110)))
1572 (define-instruction not (segment dst)
1573 (:printer reg/mem ((op '(#b1111011 #b010))))
1575 (let ((size (operand-size dst)))
1576 (maybe-emit-operand-size-prefix segment size)
1577 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1578 (emit-ea segment dst #b010))))
1580 ;;;; string manipulation
1582 (define-instruction cmps (segment size)
1583 (:printer string-op ((op #b1010011)))
1585 (maybe-emit-operand-size-prefix segment size)
1586 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1588 (define-instruction ins (segment acc)
1589 (:printer string-op ((op #b0110110)))
1591 (let ((size (operand-size acc)))
1592 (aver (accumulator-p acc))
1593 (maybe-emit-operand-size-prefix segment size)
1594 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1596 (define-instruction lods (segment acc)
1597 (:printer string-op ((op #b1010110)))
1599 (let ((size (operand-size acc)))
1600 (aver (accumulator-p acc))
1601 (maybe-emit-operand-size-prefix segment size)
1602 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1604 (define-instruction movs (segment size)
1605 (:printer string-op ((op #b1010010)))
1607 (maybe-emit-operand-size-prefix segment size)
1608 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1610 (define-instruction outs (segment acc)
1611 (:printer string-op ((op #b0110111)))
1613 (let ((size (operand-size acc)))
1614 (aver (accumulator-p acc))
1615 (maybe-emit-operand-size-prefix segment size)
1616 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1618 (define-instruction scas (segment acc)
1619 (:printer string-op ((op #b1010111)))
1621 (let ((size (operand-size acc)))
1622 (aver (accumulator-p acc))
1623 (maybe-emit-operand-size-prefix segment size)
1624 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1626 (define-instruction stos (segment acc)
1627 (:printer string-op ((op #b1010101)))
1629 (let ((size (operand-size acc)))
1630 (aver (accumulator-p acc))
1631 (maybe-emit-operand-size-prefix segment size)
1632 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1634 (define-instruction xlat (segment)
1635 (:printer byte ((op #b11010111)))
1637 (emit-byte segment #b11010111)))
1639 (define-instruction rep (segment)
1641 (emit-byte segment #b11110010)))
1643 (define-instruction repe (segment)
1644 (:printer byte ((op #b11110011)))
1646 (emit-byte segment #b11110011)))
1648 (define-instruction repne (segment)
1649 (:printer byte ((op #b11110010)))
1651 (emit-byte segment #b11110010)))
1654 ;;;; bit manipulation
1656 (define-instruction bsf (segment dst src)
1657 (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
1659 (let ((size (matching-operand-size dst src)))
1660 (when (eq size :byte)
1661 (error "can't scan bytes: ~S" src))
1662 (maybe-emit-operand-size-prefix segment size)
1663 (emit-byte segment #b00001111)
1664 (emit-byte segment #b10111100)
1665 (emit-ea segment src (reg-tn-encoding dst)))))
1667 (define-instruction bsr (segment dst src)
1668 (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
1670 (let ((size (matching-operand-size dst src)))
1671 (when (eq size :byte)
1672 (error "can't scan bytes: ~S" src))
1673 (maybe-emit-operand-size-prefix segment size)
1674 (emit-byte segment #b00001111)
1675 (emit-byte segment #b10111101)
1676 (emit-ea segment src (reg-tn-encoding dst)))))
1678 (defun emit-bit-test-and-mumble (segment src index opcode)
1679 (let ((size (operand-size src)))
1680 (when (eq size :byte)
1681 (error "can't scan bytes: ~S" src))
1682 (maybe-emit-operand-size-prefix segment size)
1683 (emit-byte segment #b00001111)
1684 (cond ((integerp index)
1685 (emit-byte segment #b10111010)
1686 (emit-ea segment src opcode)
1687 (emit-byte segment index))
1689 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
1690 (emit-ea segment src (reg-tn-encoding index))))))
1692 (eval-when (:compile-toplevel :execute)
1693 (defun bit-test-inst-printer-list (subop)
1694 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
1695 (reg/mem nil :type word-reg/mem)
1696 (imm nil :type imm-data)
1698 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
1700 (:name :tab reg/mem ", " reg)))))
1702 (define-instruction bt (segment src index)
1703 (:printer-list (bit-test-inst-printer-list #b100))
1705 (emit-bit-test-and-mumble segment src index #b100)))
1707 (define-instruction btc (segment src index)
1708 (:printer-list (bit-test-inst-printer-list #b111))
1710 (emit-bit-test-and-mumble segment src index #b111)))
1712 (define-instruction btr (segment src index)
1713 (:printer-list (bit-test-inst-printer-list #b110))
1715 (emit-bit-test-and-mumble segment src index #b110)))
1717 (define-instruction bts (segment src index)
1718 (:printer-list (bit-test-inst-printer-list #b101))
1720 (emit-bit-test-and-mumble segment src index #b101)))
1723 ;;;; control transfer
1725 (define-instruction call (segment where)
1726 (:printer near-jump ((op #b11101000)))
1727 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
1731 (emit-byte segment #b11101000)
1732 (emit-back-patch segment
1734 (lambda (segment posn)
1736 (- (label-position where)
1739 (emit-byte segment #b11101000)
1740 (emit-relative-fixup segment where))
1742 (emit-byte segment #b11111111)
1743 (emit-ea segment where #b010)))))
1745 (defun emit-byte-displacement-backpatch (segment target)
1746 (emit-back-patch segment
1748 (lambda (segment posn)
1749 (let ((disp (- (label-position target) (1+ posn))))
1750 (aver (<= -128 disp 127))
1751 (emit-byte segment disp)))))
1753 (define-instruction jmp (segment cond &optional where)
1754 ;; conditional jumps
1755 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
1756 (:printer near-cond-jump () '('j cc :tab label))
1757 ;; unconditional jumps
1758 (:printer short-jump ((op #b1011)))
1759 (:printer near-jump ((op #b11101001)) )
1760 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
1765 (lambda (segment posn delta-if-after)
1766 (let ((disp (- (label-position where posn delta-if-after)
1768 (when (<= -128 disp 127)
1770 (dpb (conditional-opcode cond)
1773 (emit-byte-displacement-backpatch segment where)
1775 (lambda (segment posn)
1776 (let ((disp (- (label-position where) (+ posn 6))))
1777 (emit-byte segment #b00001111)
1779 (dpb (conditional-opcode cond)
1782 (emit-dword segment disp)))))
1783 ((label-p (setq where cond))
1786 (lambda (segment posn delta-if-after)
1787 (let ((disp (- (label-position where posn delta-if-after)
1789 (when (<= -128 disp 127)
1790 (emit-byte segment #b11101011)
1791 (emit-byte-displacement-backpatch segment where)
1793 (lambda (segment posn)
1794 (let ((disp (- (label-position where) (+ posn 5))))
1795 (emit-byte segment #b11101001)
1796 (emit-dword segment disp)))))
1798 (emit-byte segment #b11101001)
1799 (emit-relative-fixup segment where))
1801 (unless (or (ea-p where) (tn-p where))
1802 (error "don't know what to do with ~A" where))
1803 (emit-byte segment #b11111111)
1804 (emit-ea segment where #b100)))))
1806 (define-instruction jmp-short (segment label)
1808 (emit-byte segment #b11101011)
1809 (emit-byte-displacement-backpatch segment label)))
1811 (define-instruction ret (segment &optional stack-delta)
1812 (:printer byte ((op #b11000011)))
1813 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
1817 (emit-byte segment #b11000010)
1818 (emit-word segment stack-delta))
1820 (emit-byte segment #b11000011)))))
1822 (define-instruction jecxz (segment target)
1823 (:printer short-jump ((op #b0011)))
1825 (emit-byte segment #b11100011)
1826 (emit-byte-displacement-backpatch segment target)))
1828 (define-instruction loop (segment target)
1829 (:printer short-jump ((op #b0010)))
1831 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
1832 (emit-byte-displacement-backpatch segment target)))
1834 (define-instruction loopz (segment target)
1835 (:printer short-jump ((op #b0001)))
1837 (emit-byte segment #b11100001)
1838 (emit-byte-displacement-backpatch segment target)))
1840 (define-instruction loopnz (segment target)
1841 (:printer short-jump ((op #b0000)))
1843 (emit-byte segment #b11100000)
1844 (emit-byte-displacement-backpatch segment target)))
1846 ;;;; conditional move
1847 (define-instruction cmov (segment cond dst src)
1848 (:printer cond-move ())
1850 (aver (register-p dst))
1851 (let ((size (matching-operand-size dst src)))
1852 (aver (or (eq size :word) (eq size :dword)))
1853 (maybe-emit-operand-size-prefix segment size))
1854 (emit-byte segment #b00001111)
1855 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
1856 (emit-ea segment src (reg-tn-encoding dst))))
1858 ;;;; conditional byte set
1860 (define-instruction set (segment dst cond)
1861 (:printer cond-set ())
1863 (emit-byte segment #b00001111)
1864 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
1865 (emit-ea segment dst #b000)))
1869 (define-instruction enter (segment disp &optional (level 0))
1870 (:declare (type (unsigned-byte 16) disp)
1871 (type (unsigned-byte 8) level))
1872 (:printer enter-format ((op #b11001000)))
1874 (emit-byte segment #b11001000)
1875 (emit-word segment disp)
1876 (emit-byte segment level)))
1878 (define-instruction leave (segment)
1879 (:printer byte ((op #b11001001)))
1881 (emit-byte segment #b11001001)))
1884 (define-instruction prefetchnta (segment ea)
1885 (:printer prefetch ((op #b00011000) (reg #b000)))
1887 (aver (typep ea 'ea))
1888 (aver (eq :byte (ea-size ea)))
1889 (emit-byte segment #b00001111)
1890 (emit-byte segment #b00011000)
1891 (emit-ea segment ea #b000)))
1893 (define-instruction prefetcht0 (segment ea)
1894 (:printer prefetch ((op #b00011000) (reg #b001)))
1896 (aver (typep ea 'ea))
1897 (aver (eq :byte (ea-size ea)))
1898 (emit-byte segment #b00001111)
1899 (emit-byte segment #b00011000)
1900 (emit-ea segment ea #b001)))
1902 (define-instruction prefetcht1 (segment ea)
1903 (:printer prefetch ((op #b00011000) (reg #b010)))
1905 (aver (typep ea 'ea))
1906 (aver (eq :byte (ea-size ea)))
1907 (emit-byte segment #b00001111)
1908 (emit-byte segment #b00011000)
1909 (emit-ea segment ea #b010)))
1911 (define-instruction prefetcht2 (segment ea)
1912 (:printer prefetch ((op #b00011000) (reg #b011)))
1914 (aver (typep ea 'ea))
1915 (aver (eq :byte (ea-size ea)))
1916 (emit-byte segment #b00001111)
1917 (emit-byte segment #b00011000)
1918 (emit-ea segment ea #b011)))
1920 ;;;; interrupt instructions
1922 (defun snarf-error-junk (sap offset &optional length-only)
1923 (let* ((length (sb!sys:sap-ref-8 sap offset))
1924 (vector (make-array length :element-type '(unsigned-byte 8))))
1925 (declare (type sb!sys:system-area-pointer sap)
1926 (type (unsigned-byte 8) length)
1927 (type (simple-array (unsigned-byte 8) (*)) vector))
1929 (values 0 (1+ length) nil nil))
1931 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
1933 (collect ((sc-offsets)
1935 (lengths 1) ; the length byte
1937 (error-number (sb!c:read-var-integer vector index)))
1940 (when (>= index length)
1942 (let ((old-index index))
1943 (sc-offsets (sb!c:read-var-integer vector index))
1944 (lengths (- index old-index))))
1945 (values error-number
1951 (defmacro break-cases (breaknum &body cases)
1952 (let ((bn-temp (gensym)))
1953 (collect ((clauses))
1954 (dolist (case cases)
1955 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
1956 `(let ((,bn-temp ,breaknum))
1957 (cond ,@(clauses))))))
1960 (defun break-control (chunk inst stream dstate)
1961 (declare (ignore inst))
1962 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
1963 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
1964 ;; map has it undefined; and it should be easier to look in the target
1965 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
1966 ;; from first principles whether it's defined in some way that genesis
1968 (case #-darwin (byte-imm-code chunk dstate)
1969 #+darwin (word-imm-code chunk dstate)
1972 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1975 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1977 (nt "breakpoint trap"))
1978 (#.pending-interrupt-trap
1979 (nt "pending interrupt trap"))
1982 (#.fun-end-breakpoint-trap
1983 (nt "function end breakpoint trap")))))
1985 (define-instruction break (segment code)
1986 (:declare (type (unsigned-byte 8) code))
1987 #-darwin (:printer byte-imm ((op #b11001100)) '(:name :tab code)
1988 :control #'break-control)
1989 #+darwin (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
1990 :control #'break-control)
1992 #-darwin (emit-byte segment #b11001100)
1993 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
1994 ;; throw a sigill with 0x0b0f instead and check for this in the
1995 ;; SIGILL handler and pass it on to the sigtrap handler if
1997 #+darwin (emit-word segment #b0000101100001111)
1998 (emit-byte segment code)))
2000 (define-instruction int (segment number)
2001 (:declare (type (unsigned-byte 8) number))
2002 (:printer byte-imm ((op #b11001101)))
2006 (emit-byte segment #b11001100))
2008 (emit-byte segment #b11001101)
2009 (emit-byte segment number)))))
2011 (define-instruction into (segment)
2012 (:printer byte ((op #b11001110)))
2014 (emit-byte segment #b11001110)))
2016 (define-instruction bound (segment reg bounds)
2018 (let ((size (matching-operand-size reg bounds)))
2019 (when (eq size :byte)
2020 (error "can't bounds-test bytes: ~S" reg))
2021 (maybe-emit-operand-size-prefix segment size)
2022 (emit-byte segment #b01100010)
2023 (emit-ea segment bounds (reg-tn-encoding reg)))))
2025 (define-instruction iret (segment)
2026 (:printer byte ((op #b11001111)))
2028 (emit-byte segment #b11001111)))
2030 ;;;; processor control
2032 (define-instruction hlt (segment)
2033 (:printer byte ((op #b11110100)))
2035 (emit-byte segment #b11110100)))
2037 (define-instruction nop (segment)
2038 (:printer byte ((op #b10010000)))
2040 (emit-byte segment #b10010000)))
2042 (define-instruction wait (segment)
2043 (:printer byte ((op #b10011011)))
2045 (emit-byte segment #b10011011)))
2047 (define-instruction lock (segment)
2048 (:printer byte ((op #b11110000)))
2050 (emit-byte segment #b11110000)))
2052 ;;;; miscellaneous hackery
2054 (define-instruction byte (segment byte)
2056 (emit-byte segment byte)))
2058 (define-instruction word (segment word)
2060 (emit-word segment word)))
2062 (define-instruction dword (segment dword)
2064 (emit-dword segment dword)))
2066 (defun emit-header-data (segment type)
2067 (emit-back-patch segment
2069 (lambda (segment posn)
2073 (component-header-length))
2077 (define-instruction simple-fun-header-word (segment)
2079 (emit-header-data segment simple-fun-header-widetag)))
2081 (define-instruction lra-header-word (segment)
2083 (emit-header-data segment return-pc-header-widetag)))
2085 ;;;; fp instructions
2087 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
2089 ;;;; Note: We treat the single-precision and double-precision variants
2090 ;;;; as separate instructions.
2092 ;;; Load single to st(0).
2093 (define-instruction fld (segment source)
2094 (:printer floating-point ((op '(#b001 #b000))))
2096 (emit-byte segment #b11011001)
2097 (emit-fp-op segment source #b000)))
2099 ;;; Load double to st(0).
2100 (define-instruction fldd (segment source)
2101 (:printer floating-point ((op '(#b101 #b000))))
2102 (:printer floating-point-fp ((op '(#b001 #b000))))
2104 (if (fp-reg-tn-p source)
2105 (emit-byte segment #b11011001)
2106 (emit-byte segment #b11011101))
2107 (emit-fp-op segment source #b000)))
2109 ;;; Load long to st(0).
2110 (define-instruction fldl (segment source)
2111 (:printer floating-point ((op '(#b011 #b101))))
2113 (emit-byte segment #b11011011)
2114 (emit-fp-op segment source #b101)))
2116 ;;; Store single from st(0).
2117 (define-instruction fst (segment dest)
2118 (:printer floating-point ((op '(#b001 #b010))))
2120 (cond ((fp-reg-tn-p dest)
2121 (emit-byte segment #b11011101)
2122 (emit-fp-op segment dest #b010))
2124 (emit-byte segment #b11011001)
2125 (emit-fp-op segment dest #b010)))))
2127 ;;; Store double from st(0).
2128 (define-instruction fstd (segment dest)
2129 (:printer floating-point ((op '(#b101 #b010))))
2130 (:printer floating-point-fp ((op '(#b101 #b010))))
2132 (cond ((fp-reg-tn-p dest)
2133 (emit-byte segment #b11011101)
2134 (emit-fp-op segment dest #b010))
2136 (emit-byte segment #b11011101)
2137 (emit-fp-op segment dest #b010)))))
2139 ;;; Arithmetic ops are all done with at least one operand at top of
2140 ;;; stack. The other operand is is another register or a 32/64 bit
2143 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2144 ;;; that these conflict with the Gdb conventions for binops. To reduce
2145 ;;; the confusion I've added comments showing the mathamatical
2146 ;;; operation and the two syntaxes. By the ASM386 convention the
2147 ;;; instruction syntax is:
2150 ;;; or Fop Destination, Source
2152 ;;; If only one operand is given then it is the source and the
2153 ;;; destination is ST(0). There are reversed forms of the fsub and
2154 ;;; fdiv instructions inducated by an 'R' suffix.
2156 ;;; The mathematical operation for the non-reverse form is always:
2157 ;;; destination = destination op source
2159 ;;; For the reversed form it is:
2160 ;;; destination = source op destination
2162 ;;; The instructions below only accept one operand at present which is
2163 ;;; usually the source. I've hack in extra instructions to implement
2164 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2165 ;;; the operand is the destination with the source being ST(0).
2168 ;;; st(0) = st(0) + memory or st(i).
2169 (define-instruction fadd (segment source)
2170 (:printer floating-point ((op '(#b000 #b000))))
2172 (emit-byte segment #b11011000)
2173 (emit-fp-op segment source #b000)))
2176 ;;; st(0) = st(0) + memory or st(i).
2177 (define-instruction faddd (segment source)
2178 (:printer floating-point ((op '(#b100 #b000))))
2179 (:printer floating-point-fp ((op '(#b000 #b000))))
2181 (if (fp-reg-tn-p source)
2182 (emit-byte segment #b11011000)
2183 (emit-byte segment #b11011100))
2184 (emit-fp-op segment source #b000)))
2186 ;;; Add double destination st(i):
2187 ;;; st(i) = st(0) + st(i).
2188 (define-instruction fadd-sti (segment destination)
2189 (:printer floating-point-fp ((op '(#b100 #b000))))
2191 (aver (fp-reg-tn-p destination))
2192 (emit-byte segment #b11011100)
2193 (emit-fp-op segment destination #b000)))
2195 (define-instruction faddp-sti (segment destination)
2196 (:printer floating-point-fp ((op '(#b110 #b000))))
2198 (aver (fp-reg-tn-p destination))
2199 (emit-byte segment #b11011110)
2200 (emit-fp-op segment destination #b000)))
2202 ;;; Subtract single:
2203 ;;; st(0) = st(0) - memory or st(i).
2204 (define-instruction fsub (segment source)
2205 (:printer floating-point ((op '(#b000 #b100))))
2207 (emit-byte segment #b11011000)
2208 (emit-fp-op segment source #b100)))
2210 ;;; Subtract single, reverse:
2211 ;;; st(0) = memory or st(i) - st(0).
2212 (define-instruction fsubr (segment source)
2213 (:printer floating-point ((op '(#b000 #b101))))
2215 (emit-byte segment #b11011000)
2216 (emit-fp-op segment source #b101)))
2218 ;;; Subtract double:
2219 ;;; st(0) = st(0) - memory or st(i).
2220 (define-instruction fsubd (segment source)
2221 (:printer floating-point ((op '(#b100 #b100))))
2222 (:printer floating-point-fp ((op '(#b000 #b100))))
2224 (if (fp-reg-tn-p source)
2225 (emit-byte segment #b11011000)
2226 (emit-byte segment #b11011100))
2227 (emit-fp-op segment source #b100)))
2229 ;;; Subtract double, reverse:
2230 ;;; st(0) = memory or st(i) - st(0).
2231 (define-instruction fsubrd (segment source)
2232 (:printer floating-point ((op '(#b100 #b101))))
2233 (:printer floating-point-fp ((op '(#b000 #b101))))
2235 (if (fp-reg-tn-p source)
2236 (emit-byte segment #b11011000)
2237 (emit-byte segment #b11011100))
2238 (emit-fp-op segment source #b101)))
2240 ;;; Subtract double, destination st(i):
2241 ;;; st(i) = st(i) - st(0).
2243 ;;; ASM386 syntax: FSUB ST(i), ST
2244 ;;; Gdb syntax: fsubr %st,%st(i)
2245 (define-instruction fsub-sti (segment destination)
2246 (:printer floating-point-fp ((op '(#b100 #b101))))
2248 (aver (fp-reg-tn-p destination))
2249 (emit-byte segment #b11011100)
2250 (emit-fp-op segment destination #b101)))
2252 (define-instruction fsubp-sti (segment destination)
2253 (:printer floating-point-fp ((op '(#b110 #b101))))
2255 (aver (fp-reg-tn-p destination))
2256 (emit-byte segment #b11011110)
2257 (emit-fp-op segment destination #b101)))
2259 ;;; Subtract double, reverse, destination st(i):
2260 ;;; st(i) = st(0) - st(i).
2262 ;;; ASM386 syntax: FSUBR ST(i), ST
2263 ;;; Gdb syntax: fsub %st,%st(i)
2264 (define-instruction fsubr-sti (segment destination)
2265 (:printer floating-point-fp ((op '(#b100 #b100))))
2267 (aver (fp-reg-tn-p destination))
2268 (emit-byte segment #b11011100)
2269 (emit-fp-op segment destination #b100)))
2271 (define-instruction fsubrp-sti (segment destination)
2272 (:printer floating-point-fp ((op '(#b110 #b100))))
2274 (aver (fp-reg-tn-p destination))
2275 (emit-byte segment #b11011110)
2276 (emit-fp-op segment destination #b100)))
2278 ;;; Multiply single:
2279 ;;; st(0) = st(0) * memory or st(i).
2280 (define-instruction fmul (segment source)
2281 (:printer floating-point ((op '(#b000 #b001))))
2283 (emit-byte segment #b11011000)
2284 (emit-fp-op segment source #b001)))
2286 ;;; Multiply double:
2287 ;;; st(0) = st(0) * memory or st(i).
2288 (define-instruction fmuld (segment source)
2289 (:printer floating-point ((op '(#b100 #b001))))
2290 (:printer floating-point-fp ((op '(#b000 #b001))))
2292 (if (fp-reg-tn-p source)
2293 (emit-byte segment #b11011000)
2294 (emit-byte segment #b11011100))
2295 (emit-fp-op segment source #b001)))
2297 ;;; Multiply double, destination st(i):
2298 ;;; st(i) = st(i) * st(0).
2299 (define-instruction fmul-sti (segment destination)
2300 (:printer floating-point-fp ((op '(#b100 #b001))))
2302 (aver (fp-reg-tn-p destination))
2303 (emit-byte segment #b11011100)
2304 (emit-fp-op segment destination #b001)))
2307 ;;; st(0) = st(0) / memory or st(i).
2308 (define-instruction fdiv (segment source)
2309 (:printer floating-point ((op '(#b000 #b110))))
2311 (emit-byte segment #b11011000)
2312 (emit-fp-op segment source #b110)))
2314 ;;; Divide single, reverse:
2315 ;;; st(0) = memory or st(i) / st(0).
2316 (define-instruction fdivr (segment source)
2317 (:printer floating-point ((op '(#b000 #b111))))
2319 (emit-byte segment #b11011000)
2320 (emit-fp-op segment source #b111)))
2323 ;;; st(0) = st(0) / memory or st(i).
2324 (define-instruction fdivd (segment source)
2325 (:printer floating-point ((op '(#b100 #b110))))
2326 (:printer floating-point-fp ((op '(#b000 #b110))))
2328 (if (fp-reg-tn-p source)
2329 (emit-byte segment #b11011000)
2330 (emit-byte segment #b11011100))
2331 (emit-fp-op segment source #b110)))
2333 ;;; Divide double, reverse:
2334 ;;; st(0) = memory or st(i) / st(0).
2335 (define-instruction fdivrd (segment source)
2336 (:printer floating-point ((op '(#b100 #b111))))
2337 (:printer floating-point-fp ((op '(#b000 #b111))))
2339 (if (fp-reg-tn-p source)
2340 (emit-byte segment #b11011000)
2341 (emit-byte segment #b11011100))
2342 (emit-fp-op segment source #b111)))
2344 ;;; Divide double, destination st(i):
2345 ;;; st(i) = st(i) / st(0).
2347 ;;; ASM386 syntax: FDIV ST(i), ST
2348 ;;; Gdb syntax: fdivr %st,%st(i)
2349 (define-instruction fdiv-sti (segment destination)
2350 (:printer floating-point-fp ((op '(#b100 #b111))))
2352 (aver (fp-reg-tn-p destination))
2353 (emit-byte segment #b11011100)
2354 (emit-fp-op segment destination #b111)))
2356 ;;; Divide double, reverse, destination st(i):
2357 ;;; st(i) = st(0) / st(i).
2359 ;;; ASM386 syntax: FDIVR ST(i), ST
2360 ;;; Gdb syntax: fdiv %st,%st(i)
2361 (define-instruction fdivr-sti (segment destination)
2362 (:printer floating-point-fp ((op '(#b100 #b110))))
2364 (aver (fp-reg-tn-p destination))
2365 (emit-byte segment #b11011100)
2366 (emit-fp-op segment destination #b110)))
2368 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2369 (define-instruction fxch (segment source)
2370 (:printer floating-point-fp ((op '(#b001 #b001))))
2372 (unless (and (tn-p source)
2373 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2375 (emit-byte segment #b11011001)
2376 (emit-fp-op segment source #b001)))
2378 ;;; Push 32-bit integer to st0.
2379 (define-instruction fild (segment source)
2380 (:printer floating-point ((op '(#b011 #b000))))
2382 (emit-byte segment #b11011011)
2383 (emit-fp-op segment source #b000)))
2385 ;;; Push 64-bit integer to st0.
2386 (define-instruction fildl (segment source)
2387 (:printer floating-point ((op '(#b111 #b101))))
2389 (emit-byte segment #b11011111)
2390 (emit-fp-op segment source #b101)))
2392 ;;; Store 32-bit integer.
2393 (define-instruction fist (segment dest)
2394 (:printer floating-point ((op '(#b011 #b010))))
2396 (emit-byte segment #b11011011)
2397 (emit-fp-op segment dest #b010)))
2399 ;;; Store and pop 32-bit integer.
2400 (define-instruction fistp (segment dest)
2401 (:printer floating-point ((op '(#b011 #b011))))
2403 (emit-byte segment #b11011011)
2404 (emit-fp-op segment dest #b011)))
2406 ;;; Store and pop 64-bit integer.
2407 (define-instruction fistpl (segment dest)
2408 (:printer floating-point ((op '(#b111 #b111))))
2410 (emit-byte segment #b11011111)
2411 (emit-fp-op segment dest #b111)))
2413 ;;; Store single from st(0) and pop.
2414 (define-instruction fstp (segment dest)
2415 (:printer floating-point ((op '(#b001 #b011))))
2417 (cond ((fp-reg-tn-p dest)
2418 (emit-byte segment #b11011101)
2419 (emit-fp-op segment dest #b011))
2421 (emit-byte segment #b11011001)
2422 (emit-fp-op segment dest #b011)))))
2424 ;;; Store double from st(0) and pop.
2425 (define-instruction fstpd (segment dest)
2426 (:printer floating-point ((op '(#b101 #b011))))
2427 (:printer floating-point-fp ((op '(#b101 #b011))))
2429 (cond ((fp-reg-tn-p dest)
2430 (emit-byte segment #b11011101)
2431 (emit-fp-op segment dest #b011))
2433 (emit-byte segment #b11011101)
2434 (emit-fp-op segment dest #b011)))))
2436 ;;; Store long from st(0) and pop.
2437 (define-instruction fstpl (segment dest)
2438 (:printer floating-point ((op '(#b011 #b111))))
2440 (emit-byte segment #b11011011)
2441 (emit-fp-op segment dest #b111)))
2443 ;;; Decrement stack-top pointer.
2444 (define-instruction fdecstp (segment)
2445 (:printer floating-point-no ((op #b10110)))
2447 (emit-byte segment #b11011001)
2448 (emit-byte segment #b11110110)))
2450 ;;; Increment stack-top pointer.
2451 (define-instruction fincstp (segment)
2452 (:printer floating-point-no ((op #b10111)))
2454 (emit-byte segment #b11011001)
2455 (emit-byte segment #b11110111)))
2457 ;;; Free fp register.
2458 (define-instruction ffree (segment dest)
2459 (:printer floating-point-fp ((op '(#b101 #b000))))
2461 (emit-byte segment #b11011101)
2462 (emit-fp-op segment dest #b000)))
2464 (define-instruction fabs (segment)
2465 (:printer floating-point-no ((op #b00001)))
2467 (emit-byte segment #b11011001)
2468 (emit-byte segment #b11100001)))
2470 (define-instruction fchs (segment)
2471 (:printer floating-point-no ((op #b00000)))
2473 (emit-byte segment #b11011001)
2474 (emit-byte segment #b11100000)))
2476 (define-instruction frndint(segment)
2477 (:printer floating-point-no ((op #b11100)))
2479 (emit-byte segment #b11011001)
2480 (emit-byte segment #b11111100)))
2483 (define-instruction fninit(segment)
2484 (:printer floating-point-5 ((op #b00011)))
2486 (emit-byte segment #b11011011)
2487 (emit-byte segment #b11100011)))
2489 ;;; Store Status Word to AX.
2490 (define-instruction fnstsw(segment)
2491 (:printer floating-point-st ((op #b00000)))
2493 (emit-byte segment #b11011111)
2494 (emit-byte segment #b11100000)))
2496 ;;; Load Control Word.
2498 ;;; src must be a memory location
2499 (define-instruction fldcw(segment src)
2500 (:printer floating-point ((op '(#b001 #b101))))
2502 (emit-byte segment #b11011001)
2503 (emit-fp-op segment src #b101)))
2505 ;;; Store Control Word.
2506 (define-instruction fnstcw(segment dst)
2507 (:printer floating-point ((op '(#b001 #b111))))
2509 (emit-byte segment #b11011001)
2510 (emit-fp-op segment dst #b111)))
2512 ;;; Store FP Environment.
2513 (define-instruction fstenv(segment dst)
2514 (:printer floating-point ((op '(#b001 #b110))))
2516 (emit-byte segment #b11011001)
2517 (emit-fp-op segment dst #b110)))
2519 ;;; Restore FP Environment.
2520 (define-instruction fldenv(segment src)
2521 (:printer floating-point ((op '(#b001 #b100))))
2523 (emit-byte segment #b11011001)
2524 (emit-fp-op segment src #b100)))
2527 (define-instruction fsave(segment dst)
2528 (:printer floating-point ((op '(#b101 #b110))))
2530 (emit-byte segment #b11011101)
2531 (emit-fp-op segment dst #b110)))
2533 ;;; Restore FP State.
2534 (define-instruction frstor(segment src)
2535 (:printer floating-point ((op '(#b101 #b100))))
2537 (emit-byte segment #b11011101)
2538 (emit-fp-op segment src #b100)))
2540 ;;; Clear exceptions.
2541 (define-instruction fnclex(segment)
2542 (:printer floating-point-5 ((op #b00010)))
2544 (emit-byte segment #b11011011)
2545 (emit-byte segment #b11100010)))
2548 (define-instruction fcom (segment src)
2549 (:printer floating-point ((op '(#b000 #b010))))
2551 (emit-byte segment #b11011000)
2552 (emit-fp-op segment src #b010)))
2554 (define-instruction fcomd (segment src)
2555 (:printer floating-point ((op '(#b100 #b010))))
2556 (:printer floating-point-fp ((op '(#b000 #b010))))
2558 (if (fp-reg-tn-p src)
2559 (emit-byte segment #b11011000)
2560 (emit-byte segment #b11011100))
2561 (emit-fp-op segment src #b010)))
2563 ;;; Compare ST1 to ST0, popping the stack twice.
2564 (define-instruction fcompp (segment)
2565 (:printer floating-point-3 ((op '(#b110 #b011001))))
2567 (emit-byte segment #b11011110)
2568 (emit-byte segment #b11011001)))
2570 ;;; unordered comparison
2571 (define-instruction fucom (segment src)
2572 (:printer floating-point-fp ((op '(#b101 #b100))))
2574 (aver (fp-reg-tn-p src))
2575 (emit-byte segment #b11011101)
2576 (emit-fp-op segment src #b100)))
2578 (define-instruction ftst (segment)
2579 (:printer floating-point-no ((op #b00100)))
2581 (emit-byte segment #b11011001)
2582 (emit-byte segment #b11100100)))
2586 (define-instruction fsqrt(segment)
2587 (:printer floating-point-no ((op #b11010)))
2589 (emit-byte segment #b11011001)
2590 (emit-byte segment #b11111010)))
2592 (define-instruction fscale(segment)
2593 (:printer floating-point-no ((op #b11101)))
2595 (emit-byte segment #b11011001)
2596 (emit-byte segment #b11111101)))
2598 (define-instruction fxtract(segment)
2599 (:printer floating-point-no ((op #b10100)))
2601 (emit-byte segment #b11011001)
2602 (emit-byte segment #b11110100)))
2604 (define-instruction fsin(segment)
2605 (:printer floating-point-no ((op #b11110)))
2607 (emit-byte segment #b11011001)
2608 (emit-byte segment #b11111110)))
2610 (define-instruction fcos(segment)
2611 (:printer floating-point-no ((op #b11111)))
2613 (emit-byte segment #b11011001)
2614 (emit-byte segment #b11111111)))
2616 (define-instruction fprem1(segment)
2617 (:printer floating-point-no ((op #b10101)))
2619 (emit-byte segment #b11011001)
2620 (emit-byte segment #b11110101)))
2622 (define-instruction fprem(segment)
2623 (:printer floating-point-no ((op #b11000)))
2625 (emit-byte segment #b11011001)
2626 (emit-byte segment #b11111000)))
2628 (define-instruction fxam (segment)
2629 (:printer floating-point-no ((op #b00101)))
2631 (emit-byte segment #b11011001)
2632 (emit-byte segment #b11100101)))
2634 ;;; These do push/pop to stack and need special handling
2635 ;;; in any VOPs that use them. See the book.
2637 ;;; st0 <- st1*log2(st0)
2638 (define-instruction fyl2x(segment) ; pops stack
2639 (:printer floating-point-no ((op #b10001)))
2641 (emit-byte segment #b11011001)
2642 (emit-byte segment #b11110001)))
2644 (define-instruction fyl2xp1(segment)
2645 (:printer floating-point-no ((op #b11001)))
2647 (emit-byte segment #b11011001)
2648 (emit-byte segment #b11111001)))
2650 (define-instruction f2xm1(segment)
2651 (:printer floating-point-no ((op #b10000)))
2653 (emit-byte segment #b11011001)
2654 (emit-byte segment #b11110000)))
2656 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
2657 (:printer floating-point-no ((op #b10010)))
2659 (emit-byte segment #b11011001)
2660 (emit-byte segment #b11110010)))
2662 (define-instruction fpatan(segment) ; POPS STACK
2663 (:printer floating-point-no ((op #b10011)))
2665 (emit-byte segment #b11011001)
2666 (emit-byte segment #b11110011)))
2668 ;;;; loading constants
2670 (define-instruction fldz(segment)
2671 (:printer floating-point-no ((op #b01110)))
2673 (emit-byte segment #b11011001)
2674 (emit-byte segment #b11101110)))
2676 (define-instruction fld1(segment)
2677 (:printer floating-point-no ((op #b01000)))
2679 (emit-byte segment #b11011001)
2680 (emit-byte segment #b11101000)))
2682 (define-instruction fldpi(segment)
2683 (:printer floating-point-no ((op #b01011)))
2685 (emit-byte segment #b11011001)
2686 (emit-byte segment #b11101011)))
2688 (define-instruction fldl2t(segment)
2689 (:printer floating-point-no ((op #b01001)))
2691 (emit-byte segment #b11011001)
2692 (emit-byte segment #b11101001)))
2694 (define-instruction fldl2e(segment)
2695 (:printer floating-point-no ((op #b01010)))
2697 (emit-byte segment #b11011001)
2698 (emit-byte segment #b11101010)))
2700 (define-instruction fldlg2(segment)
2701 (:printer floating-point-no ((op #b01100)))
2703 (emit-byte segment #b11011001)
2704 (emit-byte segment #b11101100)))
2706 (define-instruction fldln2(segment)
2707 (:printer floating-point-no ((op #b01101)))
2709 (emit-byte segment #b11011001)
2710 (emit-byte segment #b11101101)))