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 (setf sb
!disassem
:*disassem-inst-alignment-bytes
* 1)
20 (deftype reg
() '(unsigned-byte 3))
22 (def!constant
+default-operand-size
+ :dword
)
24 (eval-when (#-sb-xc
:compile-toplevel
:load-toplevel
:execute
)
26 (defun offset-next (value dstate
)
27 (declare (type integer value
)
28 (type sb
!disassem
:disassem-state dstate
))
29 (+ (sb!disassem
:dstate-next-addr dstate
) value
))
31 (defparameter *default-address-size
*
32 ;; Actually, :DWORD is the only one really supported.
35 (defparameter *byte-reg-names
*
36 #(al cl dl bl ah ch dh bh
))
37 (defparameter *word-reg-names
*
38 #(ax cx dx bx sp bp si di
))
39 (defparameter *dword-reg-names
*
40 #(eax ecx edx ebx esp ebp esi edi
))
42 ;;; Disassembling x86 code needs to take into account little things
43 ;;; like instructions that have a byte/word length bit in their
44 ;;; encoding, prefixes to change the default word length for a single
45 ;;; instruction, and so on. Unfortunately, there is no easy way with
46 ;;; this disassembler framework to handle prefixes that will work
47 ;;; correctly in all cases, so we copy the x86-64 version which at
48 ;;; least can handle the code output by the compiler.
50 ;;; Width information for an instruction and whether a segment
51 ;;; override prefix was seen is stored as an inst-prop on the dstate.
52 ;;; The inst-props are cleared automatically after each non-prefix
53 ;;; instruction, must be set by prefilters, and contain a single bit of
54 ;;; data each (presence/absence).
56 ;;; Return the operand size based on the prefixes and width bit from
58 (defun inst-operand-size (dstate)
59 (declare (type sb
!disassem
:disassem-state dstate
))
60 (cond ((sb!disassem
:dstate-get-inst-prop dstate
'operand-size-8
)
62 ((sb!disassem
:dstate-get-inst-prop dstate
'operand-size-16
)
65 +default-operand-size
+)))
67 ;;; Return the operand size for a "word-sized" operand based on the
68 ;;; prefixes from the dstate.
69 (defun inst-word-operand-size (dstate)
70 (declare (type sb
!disassem
:disassem-state dstate
))
71 (if (sb!disassem
:dstate-get-inst-prop dstate
'operand-size-16
)
75 (defun print-reg-with-width (value width stream dstate
)
76 (declare (ignore dstate
))
77 (princ (aref (ecase width
78 (:byte
*byte-reg-names
*)
79 (:word
*word-reg-names
*)
80 (:dword
*dword-reg-names
*))
83 ;; XXX plus should do some source-var notes
86 (defun print-reg (value stream dstate
)
87 (declare (type reg value
)
89 (type sb
!disassem
:disassem-state dstate
))
90 (print-reg-with-width value
91 (inst-operand-size dstate
)
95 (defun print-word-reg (value stream dstate
)
96 (declare (type reg value
)
98 (type sb
!disassem
:disassem-state dstate
))
99 (print-reg-with-width value
100 (inst-word-operand-size dstate
)
104 (defun print-byte-reg (value stream dstate
)
105 (declare (type reg value
)
107 (type sb
!disassem
:disassem-state dstate
))
108 (print-reg-with-width value
:byte stream dstate
))
110 (defun print-addr-reg (value stream dstate
)
111 (declare (type reg value
)
113 (type sb
!disassem
:disassem-state dstate
))
114 (print-reg-with-width value
*default-address-size
* stream dstate
))
116 (defun print-reg/mem
(value stream dstate
)
117 (declare (type (or list reg
) value
)
119 (type sb
!disassem
:disassem-state dstate
))
120 (if (typep value
'reg
)
121 (print-reg value stream dstate
)
122 (print-mem-access value stream nil dstate
)))
124 ;; Same as print-reg/mem, but prints an explicit size indicator for
125 ;; memory references.
126 (defun print-sized-reg/mem
(value stream dstate
)
127 (declare (type (or list reg
) value
)
129 (type sb
!disassem
:disassem-state dstate
))
130 (if (typep value
'reg
)
131 (print-reg value stream dstate
)
132 (print-mem-access value stream t dstate
)))
134 (defun print-byte-reg/mem
(value stream dstate
)
135 (declare (type (or list reg
) value
)
137 (type sb
!disassem
:disassem-state dstate
))
138 (if (typep value
'reg
)
139 (print-byte-reg value stream dstate
)
140 (print-mem-access value stream t dstate
)))
142 (defun print-word-reg/mem
(value stream dstate
)
143 (declare (type (or list reg
) value
)
145 (type sb
!disassem
:disassem-state dstate
))
146 (if (typep value
'reg
)
147 (print-word-reg value stream dstate
)
148 (print-mem-access value stream nil dstate
)))
150 (defun print-label (value stream dstate
)
151 (declare (ignore dstate
))
152 (sb!disassem
:princ16 value stream
))
154 (defun maybe-print-segment-override (stream dstate
)
155 (cond ((sb!disassem
:dstate-get-inst-prop dstate
'fs-segment-prefix
)
156 (princ "FS:" stream
))
157 ((sb!disassem
:dstate-get-inst-prop dstate
'gs-segment-prefix
)
158 (princ "GS:" stream
))))
160 ;;; Returns either an integer, meaning a register, or a list of
161 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
162 ;;; may be missing or nil to indicate that it's not used or has the
163 ;;; obvious default value (e.g., 1 for the index-scale).
164 (defun prefilter-reg/mem
(value dstate
)
165 (declare (type list value
)
166 (type sb
!disassem
:disassem-state dstate
))
167 (let ((mod (car value
))
169 (declare (type (unsigned-byte 2) mod
)
170 (type (unsigned-byte 3) r
/m
))
176 (let ((sib (sb!disassem
:read-suffix
8 dstate
)))
177 (declare (type (unsigned-byte 8) sib
))
178 (let ((base-reg (ldb (byte 3 0) sib
))
179 (index-reg (ldb (byte 3 3) sib
))
180 (index-scale (ldb (byte 2 6) sib
)))
181 (declare (type (unsigned-byte 3) base-reg index-reg
)
182 (type (unsigned-byte 2) index-scale
))
186 (if (= base-reg
#b101
)
187 (sb!disassem
:read-signed-suffix
32 dstate
)
190 (sb!disassem
:read-signed-suffix
8 dstate
))
192 (sb!disassem
:read-signed-suffix
32 dstate
)))))
193 (list (if (and (= mod
#b00
) (= base-reg
#b101
)) nil base-reg
)
195 (if (= index-reg
#b100
) nil index-reg
)
196 (ash 1 index-scale
))))))
197 ((and (= mod
#b00
) (= r
/m
#b101
))
198 (list nil
(sb!disassem
:read-signed-suffix
32 dstate
)) )
202 (list r
/m
(sb!disassem
:read-signed-suffix
8 dstate
)))
204 (list r
/m
(sb!disassem
:read-signed-suffix
32 dstate
))))))
207 ;;; This is a sort of bogus prefilter that just stores the info globally for
208 ;;; other people to use; it probably never gets printed.
209 (defun prefilter-width (value dstate
)
210 (declare (type bit value
)
211 (type sb
!disassem
:disassem-state dstate
))
213 (sb!disassem
:dstate-put-inst-prop dstate
'operand-size-8
))
216 ;;; This prefilter is used solely for its side effect, namely to put
217 ;;; the property OPERAND-SIZE-16 into the DSTATE.
218 (defun prefilter-x66 (value dstate
)
219 (declare (type (eql #x66
) value
)
221 (type sb
!disassem
:disassem-state dstate
))
222 (sb!disassem
:dstate-put-inst-prop dstate
'operand-size-16
))
224 ;;; This prefilter is used solely for its side effect, namely to put
225 ;;; one of the properties [FG]S-SEGMENT-PREFIX into the DSTATE.
226 ;;; Unlike PREFILTER-X66, this prefilter only catches the low bit of
228 (defun prefilter-seg (value dstate
)
229 (declare (type bit value
)
230 (type sb
!disassem
:disassem-state dstate
))
231 (sb!disassem
:dstate-put-inst-prop
232 dstate
(elt '(fs-segment-prefix gs-segment-prefix
) value
)))
234 (defun read-address (value dstate
)
235 (declare (ignore value
)) ; always nil anyway
236 (sb!disassem
:read-suffix
(width-bits *default-address-size
*) dstate
))
238 (defun width-bits (width)
248 ;;;; disassembler argument types
250 (sb!disassem
:define-arg-type displacement
252 :use-label
#'offset-next
253 :printer
(lambda (value stream dstate
)
254 (sb!disassem
:maybe-note-assembler-routine value nil dstate
)
255 (print-label value stream dstate
)))
257 (sb!disassem
:define-arg-type accum
258 :printer
(lambda (value stream dstate
)
259 (declare (ignore value
)
261 (type sb
!disassem
:disassem-state dstate
))
262 (print-reg 0 stream dstate
)))
264 (sb!disassem
:define-arg-type word-accum
265 :printer
(lambda (value stream dstate
)
266 (declare (ignore value
)
268 (type sb
!disassem
:disassem-state dstate
))
269 (print-word-reg 0 stream dstate
)))
271 (sb!disassem
:define-arg-type reg
272 :printer
#'print-reg
)
274 (sb!disassem
:define-arg-type addr-reg
275 :printer
#'print-addr-reg
)
277 (sb!disassem
:define-arg-type word-reg
278 :printer
#'print-word-reg
)
280 (sb!disassem
:define-arg-type imm-addr
281 :prefilter
#'read-address
282 :printer
#'print-label
)
284 (sb!disassem
:define-arg-type imm-data
285 :prefilter
(lambda (value dstate
)
286 (declare (ignore value
)) ; always nil anyway
287 (sb!disassem
:read-suffix
288 (width-bits (inst-operand-size dstate
))
291 (sb!disassem
:define-arg-type signed-imm-data
292 :prefilter
(lambda (value dstate
)
293 (declare (ignore value
)) ; always nil anyway
294 (let ((width (inst-operand-size dstate
)))
295 (sb!disassem
:read-signed-suffix
(width-bits width
) dstate
))))
297 (sb!disassem
:define-arg-type imm-byte
298 :prefilter
(lambda (value dstate
)
299 (declare (ignore value
)) ; always nil anyway
300 (sb!disassem
:read-suffix
8 dstate
)))
302 (sb!disassem
:define-arg-type signed-imm-byte
303 :prefilter
(lambda (value dstate
)
304 (declare (ignore value
)) ; always nil anyway
305 (sb!disassem
:read-signed-suffix
8 dstate
)))
307 (sb!disassem
:define-arg-type signed-imm-dword
308 :prefilter
(lambda (value dstate
)
309 (declare (ignore value
)) ; always nil anyway
310 (sb!disassem
:read-signed-suffix
32 dstate
)))
312 (sb!disassem
:define-arg-type imm-word
313 :prefilter
(lambda (value dstate
)
314 (declare (ignore value
)) ; always nil anyway
315 (let ((width (inst-word-operand-size dstate
)))
316 (sb!disassem
:read-suffix
(width-bits width
) dstate
))))
318 (sb!disassem
:define-arg-type signed-imm-word
319 :prefilter
(lambda (value dstate
)
320 (declare (ignore value
)) ; always nil anyway
321 (let ((width (inst-word-operand-size dstate
)))
322 (sb!disassem
:read-signed-suffix
(width-bits width
) dstate
))))
324 ;;; needed for the ret imm16 instruction
325 (sb!disassem
:define-arg-type imm-word-16
326 :prefilter
(lambda (value dstate
)
327 (declare (ignore value
)) ; always nil anyway
328 (sb!disassem
:read-suffix
16 dstate
)))
330 (sb!disassem
:define-arg-type reg
/mem
331 :prefilter
#'prefilter-reg
/mem
332 :printer
#'print-reg
/mem
)
333 (sb!disassem
:define-arg-type sized-reg
/mem
334 ;; Same as reg/mem, but prints an explicit size indicator for
335 ;; memory references.
336 :prefilter
#'prefilter-reg
/mem
337 :printer
#'print-sized-reg
/mem
)
338 (sb!disassem
:define-arg-type byte-reg
/mem
339 :prefilter
#'prefilter-reg
/mem
340 :printer
#'print-byte-reg
/mem
)
341 (sb!disassem
:define-arg-type word-reg
/mem
342 :prefilter
#'prefilter-reg
/mem
343 :printer
#'print-word-reg
/mem
)
346 (eval-when (#-sb-xc
:compile-toplevel
:load-toplevel
:execute
)
347 (defun print-fp-reg (value stream dstate
)
348 (declare (ignore dstate
))
349 (format stream
"FR~D" value
))
350 (defun prefilter-fp-reg (value dstate
)
352 (declare (ignore dstate
))
355 (sb!disassem
:define-arg-type fp-reg
356 :prefilter
#'prefilter-fp-reg
357 :printer
#'print-fp-reg
)
359 (sb!disassem
:define-arg-type width
360 :prefilter
#'prefilter-width
361 :printer
(lambda (value stream dstate
)
362 (declare (ignore value
))
363 (princ (schar (symbol-name (inst-operand-size dstate
)) 0)
366 ;;; Used to capture the effect of the #x66 operand size override prefix.
367 (sb!disassem
:define-arg-type x66
368 :prefilter
#'prefilter-x66
)
370 ;;; Used to capture the effect of the #x64 and #x65 segment override
372 (sb!disassem
:define-arg-type seg
373 :prefilter
#'prefilter-seg
)
375 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
376 (defparameter *conditions
*
379 (:b .
2) (:nae .
2) (:c .
2)
380 (:nb .
3) (:ae .
3) (:nc .
3)
381 (:eq .
4) (:e .
4) (:z .
4)
388 (:np .
11) (:po .
11)
389 (:l .
12) (:nge .
12)
390 (:nl .
13) (:ge .
13)
391 (:le .
14) (:ng .
14)
392 (:nle .
15) (:g .
15)))
393 (defparameter *condition-name-vec
*
394 (let ((vec (make-array 16 :initial-element nil
)))
395 (dolist (cond *conditions
*)
396 (when (null (aref vec
(cdr cond
)))
397 (setf (aref vec
(cdr cond
)) (car cond
))))
401 ;;; Set assembler parameters. (In CMU CL, this was done with
402 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
403 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
404 (setf sb
!assem
:*assem-scheduler-p
* nil
))
406 (sb!disassem
:define-arg-type condition-code
407 :printer
*condition-name-vec
*)
409 (defun conditional-opcode (condition)
410 (cdr (assoc condition
*conditions
* :test
#'eq
)))
412 ;;;; disassembler instruction formats
414 (eval-when (:compile-toplevel
:execute
)
415 (defun swap-if (direction field1 separator field2
)
416 `(:if
(,direction
:constant
0)
417 (,field1
,separator
,field2
)
418 (,field2
,separator
,field1
))))
420 (sb!disassem
:define-instruction-format
(byte 8 :default-printer
'(:name
))
421 (op :field
(byte 8 0))
426 ;;; Prefix instructions
428 (sb!disassem
:define-instruction-format
(x66 8)
429 (x66 :field
(byte 8 0) :type
'x66
:value
#x66
))
431 (sb!disassem
:define-instruction-format
(seg 8)
432 (seg :field
(byte 7 1) :value
#x32
)
433 (fsgs :field
(byte 1 0) :type
'seg
))
435 (sb!disassem
:define-instruction-format
(simple 8)
436 (op :field
(byte 7 1))
437 (width :field
(byte 1 0) :type
'width
)
442 (sb!disassem
:define-instruction-format
(two-bytes 16
443 :default-printer
'(:name
))
444 (op :fields
(list (byte 8 0) (byte 8 8))))
446 ;;; Same as simple, but with direction bit
447 (sb!disassem
:define-instruction-format
(simple-dir 8 :include simple
)
448 (op :field
(byte 6 2))
449 (dir :field
(byte 1 1)))
451 ;;; Same as simple, but with the immediate value occurring by default,
452 ;;; and with an appropiate printer.
453 (sb!disassem
:define-instruction-format
(accum-imm 8
455 :default-printer
'(:name
456 :tab accum
", " imm
))
457 (imm :type
'imm-data
))
459 (sb!disassem
:define-instruction-format
(reg-no-width 8
460 :default-printer
'(:name
:tab reg
))
461 (op :field
(byte 5 3))
462 (reg :field
(byte 3 0) :type
'word-reg
)
464 (accum :type
'word-accum
)
467 ;;; adds a width field to reg-no-width
468 (sb!disassem
:define-instruction-format
(reg 8
469 :default-printer
'(:name
:tab reg
))
470 (op :field
(byte 4 4))
471 (width :field
(byte 1 3) :type
'width
)
472 (reg :field
(byte 3 0) :type
'reg
)
478 ;;; Same as reg, but with direction bit
479 (sb!disassem
:define-instruction-format
(reg-dir 8 :include reg
)
480 (op :field
(byte 3 5))
481 (dir :field
(byte 1 4)))
483 (sb!disassem
:define-instruction-format
(reg-reg/mem
16
485 `(:name
:tab reg
", " reg
/mem
))
486 (op :field
(byte 7 1))
487 (width :field
(byte 1 0) :type
'width
)
488 (reg/mem
:fields
(list (byte 2 14) (byte 3 8))
490 (reg :field
(byte 3 11) :type
'reg
)
494 ;;; same as reg-reg/mem, but with direction bit
495 (sb!disassem
:define-instruction-format
(reg-reg/mem-dir
16
500 ,(swap-if 'dir
'reg
/mem
", " 'reg
)))
501 (op :field
(byte 6 2))
502 (dir :field
(byte 1 1)))
504 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
505 (sb!disassem
:define-instruction-format
(reg/mem
16
506 :default-printer
'(:name
:tab reg
/mem
))
507 (op :fields
(list (byte 7 1) (byte 3 11)))
508 (width :field
(byte 1 0) :type
'width
)
509 (reg/mem
:fields
(list (byte 2 14) (byte 3 8))
510 :type
'sized-reg
/mem
)
514 ;;; Same as reg/mem, but with the immediate value occurring by default,
515 ;;; and with an appropiate printer.
516 (sb!disassem
:define-instruction-format
(reg/mem-imm
16
519 '(:name
:tab reg
/mem
", " imm
))
520 (reg/mem
:type
'sized-reg
/mem
)
521 (imm :type
'imm-data
))
523 ;;; Same as reg/mem, but with using the accumulator in the default printer
524 (sb!disassem
:define-instruction-format
526 :include reg
/mem
:default-printer
'(:name
:tab accum
", " reg
/mem
))
527 (reg/mem
:type
'reg
/mem
) ; don't need a size
528 (accum :type
'accum
))
530 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
531 (sb!disassem
:define-instruction-format
(ext-reg-reg/mem
24
533 `(:name
:tab reg
", " reg
/mem
))
534 (prefix :field
(byte 8 0) :value
#b00001111
)
535 (op :field
(byte 7 9))
536 (width :field
(byte 1 8) :type
'width
)
537 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
539 (reg :field
(byte 3 19) :type
'reg
)
543 (sb!disassem
:define-instruction-format
(ext-reg-reg/mem-no-width
24
545 `(:name
:tab reg
", " reg
/mem
))
546 (prefix :field
(byte 8 0) :value
#b00001111
)
547 (op :field
(byte 8 8))
548 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
550 (reg :field
(byte 3 19) :type
'reg
)
554 (sb!disassem
:define-instruction-format
(ext-reg/mem-no-width
24
556 `(:name
:tab reg
/mem
))
557 (prefix :field
(byte 8 0) :value
#b00001111
)
558 (op :fields
(list (byte 8 8) (byte 3 19)))
559 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
562 ;;; reg-no-width with #x0f prefix
563 (sb!disassem
:define-instruction-format
(ext-reg-no-width 16
564 :default-printer
'(:name
:tab reg
))
565 (prefix :field
(byte 8 0) :value
#b00001111
)
566 (op :field
(byte 5 11))
567 (reg :field
(byte 3 8) :type
'reg
))
569 ;;; Same as reg/mem, but with a prefix of #b00001111
570 (sb!disassem
:define-instruction-format
(ext-reg/mem
24
571 :default-printer
'(:name
:tab reg
/mem
))
572 (prefix :field
(byte 8 0) :value
#b00001111
)
573 (op :fields
(list (byte 7 9) (byte 3 19)))
574 (width :field
(byte 1 8) :type
'width
)
575 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
576 :type
'sized-reg
/mem
)
580 (sb!disassem
:define-instruction-format
(ext-reg/mem-imm
24
583 '(:name
:tab reg
/mem
", " imm
))
584 (imm :type
'imm-data
))
586 (sb!disassem
:define-instruction-format
(ext-reg/mem-no-width
+imm8
24
587 :include ext-reg
/mem-no-width
589 '(:name
:tab reg
/mem
", " imm
))
590 (imm :type
'imm-byte
))
592 ;;;; This section was added by jrd, for fp instructions.
594 ;;; regular fp inst to/from registers/memory
595 (sb!disassem
:define-instruction-format
(floating-point 16
597 `(:name
:tab reg
/mem
))
598 (prefix :field
(byte 5 3) :value
#b11011
)
599 (op :fields
(list (byte 3 0) (byte 3 11)))
600 (reg/mem
:fields
(list (byte 2 14) (byte 3 8)) :type
'reg
/mem
))
602 ;;; fp insn to/from fp reg
603 (sb!disassem
:define-instruction-format
(floating-point-fp 16
604 :default-printer
`(:name
:tab fp-reg
))
605 (prefix :field
(byte 5 3) :value
#b11011
)
606 (suffix :field
(byte 2 14) :value
#b11
)
607 (op :fields
(list (byte 3 0) (byte 3 11)))
608 (fp-reg :field
(byte 3 8) :type
'fp-reg
))
610 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
611 (sb!disassem
:define-instruction-format
612 (floating-point-fp-d 16
613 :default-printer
`(:name
:tab
,(swap-if 'd
"ST0" ", " 'fp-reg
)))
614 (prefix :field
(byte 5 3) :value
#b11011
)
615 (suffix :field
(byte 2 14) :value
#b11
)
616 (op :fields
(list (byte 2 0) (byte 3 11)))
617 (d :field
(byte 1 2))
618 (fp-reg :field
(byte 3 8) :type
'fp-reg
))
621 ;;; (added by (?) pfw)
622 ;;; fp no operand isns
623 (sb!disassem
:define-instruction-format
(floating-point-no 16
624 :default-printer
'(:name
))
625 (prefix :field
(byte 8 0) :value
#b11011001
)
626 (suffix :field
(byte 3 13) :value
#b111
)
627 (op :field
(byte 5 8)))
629 (sb!disassem
:define-instruction-format
(floating-point-3 16
630 :default-printer
'(:name
))
631 (prefix :field
(byte 5 3) :value
#b11011
)
632 (suffix :field
(byte 2 14) :value
#b11
)
633 (op :fields
(list (byte 3 0) (byte 6 8))))
635 (sb!disassem
:define-instruction-format
(floating-point-5 16
636 :default-printer
'(:name
))
637 (prefix :field
(byte 8 0) :value
#b11011011
)
638 (suffix :field
(byte 3 13) :value
#b111
)
639 (op :field
(byte 5 8)))
641 (sb!disassem
:define-instruction-format
(floating-point-st 16
642 :default-printer
'(:name
))
643 (prefix :field
(byte 8 0) :value
#b11011111
)
644 (suffix :field
(byte 3 13) :value
#b111
)
645 (op :field
(byte 5 8)))
647 (sb!disassem
:define-instruction-format
(string-op 8
649 :default-printer
'(:name width
)))
651 (sb!disassem
:define-instruction-format
(short-cond-jump 16)
652 (op :field
(byte 4 4))
653 (cc :field
(byte 4 0) :type
'condition-code
)
654 (label :field
(byte 8 8) :type
'displacement
))
656 (sb!disassem
:define-instruction-format
(short-jump 16
657 :default-printer
'(:name
:tab label
))
658 (const :field
(byte 4 4) :value
#b1110
)
659 (op :field
(byte 4 0))
660 (label :field
(byte 8 8) :type
'displacement
))
662 (sb!disassem
:define-instruction-format
(near-cond-jump 16)
663 (op :fields
(list (byte 8 0) (byte 4 12)) :value
'(#b00001111
#b1000
))
664 (cc :field
(byte 4 8) :type
'condition-code
)
665 ;; The disassembler currently doesn't let you have an instruction > 32 bits
666 ;; long, so we fake it by using a prefilter to read the offset.
667 (label :type
'displacement
668 :prefilter
(lambda (value dstate
)
669 (declare (ignore value
)) ; always nil anyway
670 (sb!disassem
:read-signed-suffix
32 dstate
))))
672 (sb!disassem
:define-instruction-format
(near-jump 8
673 :default-printer
'(:name
:tab label
))
674 (op :field
(byte 8 0))
675 ;; The disassembler currently doesn't let you have an instruction > 32 bits
676 ;; long, so we fake it by using a prefilter to read the address.
677 (label :type
'displacement
678 :prefilter
(lambda (value dstate
)
679 (declare (ignore value
)) ; always nil anyway
680 (sb!disassem
:read-signed-suffix
32 dstate
))))
683 (sb!disassem
:define-instruction-format
(cond-set 24
684 :default-printer
'('set cc
:tab reg
/mem
))
685 (prefix :field
(byte 8 0) :value
#b00001111
)
686 (op :field
(byte 4 12) :value
#b1001
)
687 (cc :field
(byte 4 8) :type
'condition-code
)
688 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
690 (reg :field
(byte 3 19) :value
#b000
))
692 (sb!disassem
:define-instruction-format
(cond-move 24
694 '('cmov cc
:tab reg
", " reg
/mem
))
695 (prefix :field
(byte 8 0) :value
#b00001111
)
696 (op :field
(byte 4 12) :value
#b0100
)
697 (cc :field
(byte 4 8) :type
'condition-code
)
698 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
700 (reg :field
(byte 3 19) :type
'reg
))
702 (sb!disassem
:define-instruction-format
(enter-format 32
703 :default-printer
'(:name
705 (:unless
(:constant
0)
707 (op :field
(byte 8 0))
708 (disp :field
(byte 16 8))
709 (level :field
(byte 8 24)))
711 (sb!disassem
:define-instruction-format
(prefetch 24
713 '(:name
", " reg
/mem
))
714 (prefix :field
(byte 8 0) :value
#b00001111
)
715 (op :field
(byte 8 8) :value
#b00011000
)
716 (reg/mem
:fields
(list (byte 2 22) (byte 3 16)) :type
'byte-reg
/mem
)
717 (reg :field
(byte 3 19) :type
'reg
))
719 ;;; Single byte instruction with an immediate byte argument.
720 (sb!disassem
:define-instruction-format
(byte-imm 16
721 :default-printer
'(:name
:tab code
))
722 (op :field
(byte 8 0))
723 (code :field
(byte 8 8) :reader byte-imm-code
))
725 ;;; Two byte instruction with an immediate byte argument.
727 (sb!disassem
:define-instruction-format
(word-imm 24
728 :default-printer
'(:name
:tab code
))
729 (op :field
(byte 16 0))
730 (code :field
(byte 8 16) :reader word-imm-code
))
733 ;;;; primitive emitters
735 (define-bitfield-emitter emit-word
16
738 (define-bitfield-emitter emit-dword
32
741 (define-bitfield-emitter emit-byte-with-reg
8
742 (byte 5 3) (byte 3 0))
744 (define-bitfield-emitter emit-mod-reg-r
/m-byte
8
745 (byte 2 6) (byte 3 3) (byte 3 0))
747 (define-bitfield-emitter emit-sib-byte
8
748 (byte 2 6) (byte 3 3) (byte 3 0))
752 (defun emit-absolute-fixup (segment fixup
)
753 (note-fixup segment
:absolute fixup
)
754 (let ((offset (fixup-offset fixup
)))
756 (emit-back-patch segment
757 4 ; FIXME: n-word-bytes
758 (lambda (segment posn
)
759 (declare (ignore posn
))
761 (- (+ (component-header-length)
762 (or (label-position offset
)
764 other-pointer-lowtag
))))
765 (emit-dword segment
(or offset
0)))))
767 (defun emit-relative-fixup (segment fixup
)
768 (note-fixup segment
:relative fixup
)
769 (emit-dword segment
(or (fixup-offset fixup
) 0)))
771 ;;;; the effective-address (ea) structure
773 (defun reg-tn-encoding (tn)
774 (declare (type tn tn
))
775 (aver (eq (sb-name (sc-sb (tn-sc tn
))) 'registers
))
776 (let ((offset (tn-offset tn
)))
777 (logior (ash (logand offset
1) 2)
780 (defstruct (ea (:constructor make-ea
(size &key base index scale disp
))
782 (size nil
:type
(member :byte
:word
:dword
))
783 (base nil
:type
(or tn null
))
784 (index nil
:type
(or tn null
))
785 (scale 1 :type
(member 1 2 4 8))
786 (disp 0 :type
(or (unsigned-byte 32) (signed-byte 32) fixup
)))
787 (def!method print-object
((ea ea
) stream
)
788 (cond ((or *print-escape
* *print-readably
*)
789 (print-unreadable-object (ea stream
:type t
)
791 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
795 (let ((scale (ea-scale ea
)))
796 (if (= scale
1) nil scale
))
799 (format stream
"~A PTR [" (symbol-name (ea-size ea
)))
801 (write-string (sb!c
::location-print-name
(ea-base ea
)) stream
)
803 (write-string "+" stream
)))
805 (write-string (sb!c
::location-print-name
(ea-index ea
)) stream
))
806 (unless (= (ea-scale ea
) 1)
807 (format stream
"*~A" (ea-scale ea
)))
808 (typecase (ea-disp ea
)
811 (format stream
"~@D" (ea-disp ea
)))
813 (format stream
"+~A" (ea-disp ea
))))
814 (write-char #\
] stream
))))
816 (defun emit-ea (segment thing reg
&optional allow-constants
)
819 (ecase (sb-name (sc-sb (tn-sc thing
)))
821 (emit-mod-reg-r/m-byte segment
#b11 reg
(reg-tn-encoding thing
)))
823 ;; Convert stack tns into an index off of EBP.
824 (let ((disp (frame-byte-offset (tn-offset thing
))))
825 (cond ((<= -
128 disp
127)
826 (emit-mod-reg-r/m-byte segment
#b01 reg
#b101
)
827 (emit-byte segment disp
))
829 (emit-mod-reg-r/m-byte segment
#b10 reg
#b101
)
830 (emit-dword segment disp
)))))
832 (unless allow-constants
834 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
835 (emit-mod-reg-r/m-byte segment
#b00 reg
#b101
)
836 (emit-absolute-fixup segment
839 (- (* (tn-offset thing
) n-word-bytes
)
840 other-pointer-lowtag
))))))
842 (let* ((base (ea-base thing
))
843 (index (ea-index thing
))
844 (scale (ea-scale thing
))
845 (disp (ea-disp thing
))
846 (mod (cond ((or (null base
)
848 (not (= (reg-tn-encoding base
) #b101
))))
850 ((and (fixnump disp
) (<= -
128 disp
127))
854 (r/m
(cond (index #b100
)
856 (t (reg-tn-encoding base
)))))
857 (when (and (fixup-p disp
)
858 (label-p (fixup-offset disp
)))
861 (return-from emit-ea
(emit-ea segment disp reg allow-constants
)))
862 (emit-mod-reg-r/m-byte segment mod reg r
/m
)
864 (let ((ss (1- (integer-length scale
)))
865 (index (if (null index
)
867 (let ((index (reg-tn-encoding index
)))
869 (error "can't index off of ESP")
871 (base (if (null base
)
873 (reg-tn-encoding base
))))
874 (emit-sib-byte segment ss index base
)))
876 (emit-byte segment disp
))
877 ((or (= mod
#b10
) (null base
))
879 (emit-absolute-fixup segment disp
)
880 (emit-dword segment disp
))))))
882 (emit-mod-reg-r/m-byte segment
#b00 reg
#b101
)
883 (emit-absolute-fixup segment thing
))))
885 (defun fp-reg-tn-p (thing)
887 (eq (sb-name (sc-sb (tn-sc thing
))) 'float-registers
)))
889 ;;; like the above, but for fp-instructions--jrd
890 (defun emit-fp-op (segment thing op
)
891 (if (fp-reg-tn-p thing
)
892 (emit-byte segment
(dpb op
(byte 3 3) (dpb (tn-offset thing
)
895 (emit-ea segment thing op
)))
897 (defun byte-reg-p (thing)
899 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
900 (member (sc-name (tn-sc thing
)) *byte-sc-names
*)
903 (defun byte-ea-p (thing)
905 (ea (eq (ea-size thing
) :byte
))
907 (and (member (sc-name (tn-sc thing
)) *byte-sc-names
*) t
))
910 (defun word-reg-p (thing)
912 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
913 (member (sc-name (tn-sc thing
)) *word-sc-names
*)
916 (defun word-ea-p (thing)
918 (ea (eq (ea-size thing
) :word
))
919 (tn (and (member (sc-name (tn-sc thing
)) *word-sc-names
*) t
))
922 (defun dword-reg-p (thing)
924 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
925 (member (sc-name (tn-sc thing
)) *dword-sc-names
*)
928 (defun dword-ea-p (thing)
930 (ea (eq (ea-size thing
) :dword
))
932 (and (member (sc-name (tn-sc thing
)) *dword-sc-names
*) t
))
935 (defun register-p (thing)
937 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)))
939 (defun accumulator-p (thing)
940 (and (register-p thing
)
941 (= (tn-offset thing
) 0)))
945 (def!constant
+operand-size-prefix-byte
+ #b01100110
)
947 (defun maybe-emit-operand-size-prefix (segment size
)
948 (unless (or (eq size
:byte
) (eq size
+default-operand-size
+))
949 (emit-byte segment
+operand-size-prefix-byte
+)))
951 (defun operand-size (thing)
954 ;; FIXME: might as well be COND instead of having to use #. readmacro
955 ;; to hack up the code
956 (case (sc-name (tn-sc thing
))
963 ;; added by jrd: float-registers is a separate size (?)
969 (error "can't tell the size of ~S ~S" thing
(sc-name (tn-sc thing
))))))
975 (defun matching-operand-size (dst src
)
976 (let ((dst-size (operand-size dst
))
977 (src-size (operand-size src
)))
980 (if (eq dst-size src-size
)
982 (error "size mismatch: ~S is a ~S and ~S is a ~S."
983 dst dst-size src src-size
))
987 (error "can't tell the size of either ~S or ~S" dst src
)))))
989 (defun emit-sized-immediate (segment size value
)
992 (emit-byte segment value
))
994 (emit-word segment value
))
996 (emit-dword segment value
))))
1000 (define-instruction x66
(segment)
1001 (:printer x66
() nil
:print-name nil
)
1003 (bug "#X66 prefix used as a standalone instruction")))
1005 (defun emit-prefix (segment name
)
1010 (emit-byte segment
#xf0
))
1012 (emit-byte segment
#x64
))
1014 (emit-byte segment
#x65
))))
1016 (define-instruction fs
(segment)
1017 (:printer seg
((fsgs #b0
)) nil
:print-name nil
)
1019 (bug "FS prefix used as a standalone instruction")))
1021 (define-instruction gs
(segment)
1022 (:printer seg
((fsgs #b1
)) nil
:print-name nil
)
1024 (bug "GS prefix used as a standalone instruction")))
1026 (define-instruction lock
(segment)
1027 (:printer byte
((op #b11110000
)) nil
)
1029 (bug "LOCK prefix used as a standalone instruction")))
1031 (define-instruction rep
(segment)
1033 (emit-byte segment
#b11110011
)))
1035 (define-instruction repe
(segment)
1036 (:printer byte
((op #b11110011
)) nil
)
1038 (emit-byte segment
#b11110011
)))
1040 (define-instruction repne
(segment)
1041 (:printer byte
((op #b11110010
)) nil
)
1043 (emit-byte segment
#b11110010
)))
1045 ;;;; general data transfer
1047 (define-instruction mov
(segment dst src
&optional prefix
)
1048 ;; immediate to register
1049 (:printer reg
((op #b1011
) (imm nil
:type
'imm-data
))
1050 '(:name
:tab reg
", " imm
))
1051 ;; absolute mem to/from accumulator
1052 (:printer simple-dir
((op #b101000
) (imm nil
:type
'imm-addr
))
1053 `(:name
:tab
,(swap-if 'dir
'accum
", " '("[" imm
"]"))))
1054 ;; register to/from register/memory
1055 (:printer reg-reg
/mem-dir
((op #b100010
)))
1056 ;; immediate to register/memory
1057 (:printer reg
/mem-imm
((op '(#b1100011
#b000
))))
1060 (emit-prefix segment prefix
)
1061 (let ((size (matching-operand-size dst src
)))
1062 (maybe-emit-operand-size-prefix segment size
)
1063 (cond ((register-p dst
)
1064 (cond ((integerp src
)
1065 (emit-byte-with-reg segment
1069 (reg-tn-encoding dst
))
1070 (emit-sized-immediate segment size src
))
1071 ((and (fixup-p src
) (accumulator-p dst
))
1076 (emit-absolute-fixup segment src
))
1082 (emit-ea segment src
(reg-tn-encoding dst
) t
))))
1083 ((and (fixup-p dst
) (accumulator-p src
))
1084 (emit-byte segment
(if (eq size
:byte
) #b10100010
#b10100011
))
1085 (emit-absolute-fixup segment dst
))
1087 (emit-byte segment
(if (eq size
:byte
) #b11000110
#b11000111
))
1088 (emit-ea segment dst
#b000
)
1089 (emit-sized-immediate segment size src
))
1091 (emit-byte segment
(if (eq size
:byte
) #b10001000
#b10001001
))
1092 (emit-ea segment dst
(reg-tn-encoding src
)))
1094 (aver (eq size
:dword
))
1095 (emit-byte segment
#b11000111
)
1096 (emit-ea segment dst
#b000
)
1097 (emit-absolute-fixup segment src
))
1099 (error "bogus arguments to MOV: ~S ~S" dst src
))))))
1101 (defun emit-move-with-extension (segment dst src opcode
)
1102 (aver (register-p dst
))
1103 (let ((dst-size (operand-size dst
))
1104 (src-size (operand-size src
)))
1107 (aver (eq src-size
:byte
))
1108 (maybe-emit-operand-size-prefix segment
:word
)
1109 (emit-byte segment
#b00001111
)
1110 (emit-byte segment opcode
)
1111 (emit-ea segment src
(reg-tn-encoding dst
)))
1115 (maybe-emit-operand-size-prefix segment
:dword
)
1116 (emit-byte segment
#b00001111
)
1117 (emit-byte segment opcode
)
1118 (emit-ea segment src
(reg-tn-encoding dst
)))
1120 (emit-byte segment
#b00001111
)
1121 (emit-byte segment
(logior opcode
1))
1122 (emit-ea segment src
(reg-tn-encoding dst
))))))))
1124 (define-instruction movsx
(segment dst src
)
1125 (:printer ext-reg-reg
/mem
((op #b1011111
)
1126 (reg nil
:type
'word-reg
)
1127 (reg/mem nil
:type
'sized-reg
/mem
)))
1128 (:emitter
(emit-move-with-extension segment dst src
#b10111110
)))
1130 (define-instruction movzx
(segment dst src
)
1131 (:printer ext-reg-reg
/mem
((op #b1011011
)
1132 (reg nil
:type
'word-reg
)
1133 (reg/mem nil
:type
'sized-reg
/mem
)))
1134 (:emitter
(emit-move-with-extension segment dst src
#b10110110
)))
1136 (define-instruction push
(segment src
&optional prefix
)
1138 (:printer reg-no-width
((op #b01010
)))
1140 (:printer reg
/mem
((op '(#b1111111
#b110
)) (width 1)))
1142 (:printer byte
((op #b01101010
) (imm nil
:type
'signed-imm-byte
))
1144 (:printer byte
((op #b01101000
) (imm nil
:type
'imm-word
))
1146 ;; ### segment registers?
1149 (emit-prefix segment prefix
)
1150 (cond ((integerp src
)
1151 (cond ((<= -
128 src
127)
1152 (emit-byte segment
#b01101010
)
1153 (emit-byte segment src
))
1155 (emit-byte segment
#b01101000
)
1156 (emit-dword segment src
))))
1158 ;; Interpret the fixup as an immediate dword to push.
1159 (emit-byte segment
#b01101000
)
1160 (emit-absolute-fixup segment src
))
1162 (let ((size (operand-size src
)))
1163 (aver (not (eq size
:byte
)))
1164 (maybe-emit-operand-size-prefix segment size
)
1165 (cond ((register-p src
)
1166 (emit-byte-with-reg segment
#b01010
(reg-tn-encoding src
)))
1168 (emit-byte segment
#b11111111
)
1169 (emit-ea segment src
#b110 t
))))))))
1171 (define-instruction pusha
(segment)
1172 (:printer byte
((op #b01100000
)))
1174 (emit-byte segment
#b01100000
)))
1176 (define-instruction pop
(segment dst
)
1177 (:printer reg-no-width
((op #b01011
)))
1178 (:printer reg
/mem
((op '(#b1000111
#b000
)) (width 1)))
1180 (let ((size (operand-size dst
)))
1181 (aver (not (eq size
:byte
)))
1182 (maybe-emit-operand-size-prefix segment size
)
1183 (cond ((register-p dst
)
1184 (emit-byte-with-reg segment
#b01011
(reg-tn-encoding dst
)))
1186 (emit-byte segment
#b10001111
)
1187 (emit-ea segment dst
#b000
))))))
1189 (define-instruction popa
(segment)
1190 (:printer byte
((op #b01100001
)))
1192 (emit-byte segment
#b01100001
)))
1194 (define-instruction xchg
(segment operand1 operand2
)
1195 ;; Register with accumulator.
1196 (:printer reg-no-width
((op #b10010
)) '(:name
:tab accum
", " reg
))
1197 ;; Register/Memory with Register.
1198 (:printer reg-reg
/mem
((op #b1000011
)))
1200 (let ((size (matching-operand-size operand1 operand2
)))
1201 (maybe-emit-operand-size-prefix segment size
)
1202 (labels ((xchg-acc-with-something (acc something
)
1203 (if (and (not (eq size
:byte
)) (register-p something
))
1204 (emit-byte-with-reg segment
1206 (reg-tn-encoding something
))
1207 (xchg-reg-with-something acc something
)))
1208 (xchg-reg-with-something (reg something
)
1209 (emit-byte segment
(if (eq size
:byte
) #b10000110
#b10000111
))
1210 (emit-ea segment something
(reg-tn-encoding reg
))))
1211 (cond ((accumulator-p operand1
)
1212 (xchg-acc-with-something operand1 operand2
))
1213 ((accumulator-p operand2
)
1214 (xchg-acc-with-something operand2 operand1
))
1215 ((register-p operand1
)
1216 (xchg-reg-with-something operand1 operand2
))
1217 ((register-p operand2
)
1218 (xchg-reg-with-something operand2 operand1
))
1220 (error "bogus args to XCHG: ~S ~S" operand1 operand2
)))))))
1222 (define-instruction lea
(segment dst src
)
1223 (:printer reg-reg
/mem
((op #b1000110
) (width 1)))
1225 (aver (dword-reg-p dst
))
1226 (emit-byte segment
#b10001101
)
1227 (emit-ea segment src
(reg-tn-encoding dst
))))
1229 (define-instruction cmpxchg
(segment dst src
&optional prefix
)
1230 ;; Register/Memory with Register.
1231 (:printer ext-reg-reg
/mem
((op #b1011000
)) '(:name
:tab reg
/mem
", " reg
))
1233 (aver (register-p src
))
1234 (emit-prefix segment prefix
)
1235 (let ((size (matching-operand-size src dst
)))
1236 (maybe-emit-operand-size-prefix segment size
)
1237 (emit-byte segment
#b00001111
)
1238 (emit-byte segment
(if (eq size
:byte
) #b10110000
#b10110001
))
1239 (emit-ea segment dst
(reg-tn-encoding src
)))))
1241 (define-instruction cmpxchg8b
(segment mem
&optional prefix
)
1242 (:printer ext-reg
/mem-no-width
((op '(#xC7
1))))
1244 (aver (not (register-p mem
)))
1245 (emit-prefix segment prefix
)
1246 (emit-byte segment
#x0F
)
1247 (emit-byte segment
#xC7
)
1248 (emit-ea segment mem
1)))
1250 (define-instruction rdrand
(segment dst
)
1251 (:printer ext-reg
/mem-no-width
1254 (aver (register-p dst
))
1255 (maybe-emit-operand-size-prefix segment
(operand-size dst
))
1256 (emit-byte segment
#x0F
)
1257 (emit-byte segment
#xC7
)
1258 (emit-ea segment dst
6)))
1260 (define-instruction pause
(segment)
1261 (:printer two-bytes
((op '(#xf3
#x90
))))
1263 (emit-byte segment
#xf3
)
1264 (emit-byte segment
#x90
)))
1266 ;;;; flag control instructions
1268 ;;; CLC -- Clear Carry Flag.
1269 (define-instruction clc
(segment)
1270 (:printer byte
((op #b11111000
)))
1272 (emit-byte segment
#b11111000
)))
1274 ;;; CLD -- Clear Direction Flag.
1275 (define-instruction cld
(segment)
1276 (:printer byte
((op #b11111100
)))
1278 (emit-byte segment
#b11111100
)))
1280 ;;; CLI -- Clear Iterrupt Enable Flag.
1281 (define-instruction cli
(segment)
1282 (:printer byte
((op #b11111010
)))
1284 (emit-byte segment
#b11111010
)))
1286 ;;; CMC -- Complement Carry Flag.
1287 (define-instruction cmc
(segment)
1288 (:printer byte
((op #b11110101
)))
1290 (emit-byte segment
#b11110101
)))
1292 ;;; LAHF -- Load AH into flags.
1293 (define-instruction lahf
(segment)
1294 (:printer byte
((op #b10011111
)))
1296 (emit-byte segment
#b10011111
)))
1298 ;;; POPF -- Pop flags.
1299 (define-instruction popf
(segment)
1300 (:printer byte
((op #b10011101
)))
1302 (emit-byte segment
#b10011101
)))
1304 ;;; PUSHF -- push flags.
1305 (define-instruction pushf
(segment)
1306 (:printer byte
((op #b10011100
)))
1308 (emit-byte segment
#b10011100
)))
1310 ;;; SAHF -- Store AH into flags.
1311 (define-instruction sahf
(segment)
1312 (:printer byte
((op #b10011110
)))
1314 (emit-byte segment
#b10011110
)))
1316 ;;; STC -- Set Carry Flag.
1317 (define-instruction stc
(segment)
1318 (:printer byte
((op #b11111001
)))
1320 (emit-byte segment
#b11111001
)))
1322 ;;; STD -- Set Direction Flag.
1323 (define-instruction std
(segment)
1324 (:printer byte
((op #b11111101
)))
1326 (emit-byte segment
#b11111101
)))
1328 ;;; STI -- Set Interrupt Enable Flag.
1329 (define-instruction sti
(segment)
1330 (:printer byte
((op #b11111011
)))
1332 (emit-byte segment
#b11111011
)))
1336 (defun emit-random-arith-inst (name segment dst src opcode
1337 &optional allow-constants
)
1338 (let ((size (matching-operand-size dst src
)))
1339 (maybe-emit-operand-size-prefix segment size
)
1342 (cond ((and (not (eq size
:byte
)) (<= -
128 src
127))
1343 (emit-byte segment
#b10000011
)
1344 (emit-ea segment dst opcode allow-constants
)
1345 (emit-byte segment src
))
1346 ((accumulator-p dst
)
1353 (emit-sized-immediate segment size src
))
1355 (emit-byte segment
(if (eq size
:byte
) #b10000000
#b10000001
))
1356 (emit-ea segment dst opcode allow-constants
)
1357 (emit-sized-immediate segment size src
))))
1362 (if (eq size
:byte
) #b00000000
#b00000001
)))
1363 (emit-ea segment dst
(reg-tn-encoding src
) allow-constants
))
1368 (if (eq size
:byte
) #b00000010
#b00000011
)))
1369 (emit-ea segment src
(reg-tn-encoding dst
) allow-constants
))
1371 (error "bogus operands to ~A" name
)))))
1373 (eval-when (:compile-toplevel
:execute
)
1374 (defun arith-inst-printer-list (subop)
1375 `((accum-imm ((op ,(dpb subop
(byte 3 2) #b0000010
))))
1376 (reg/mem-imm
((op (#b1000000
,subop
))))
1377 (reg/mem-imm
((op (#b1000001
,subop
))
1378 (imm nil
:type signed-imm-byte
)))
1379 (reg-reg/mem-dir
((op ,(dpb subop
(byte 3 1) #b000000
)))))))
1381 (define-instruction add
(segment dst src
&optional prefix
)
1382 (:printer-list
(arith-inst-printer-list #b000
))
1384 (emit-prefix segment prefix
)
1385 (emit-random-arith-inst "ADD" segment dst src
#b000
)))
1387 (define-instruction adc
(segment dst src
)
1388 (:printer-list
(arith-inst-printer-list #b010
))
1389 (:emitter
(emit-random-arith-inst "ADC" segment dst src
#b010
)))
1391 (define-instruction sub
(segment dst src
&optional prefix
)
1392 (:printer-list
(arith-inst-printer-list #b101
))
1394 (emit-prefix segment prefix
)
1395 (emit-random-arith-inst "SUB" segment dst src
#b101
)))
1397 (define-instruction sbb
(segment dst src
)
1398 (:printer-list
(arith-inst-printer-list #b011
))
1399 (:emitter
(emit-random-arith-inst "SBB" segment dst src
#b011
)))
1401 (define-instruction cmp
(segment dst src
&optional prefix
)
1402 (:printer-list
(arith-inst-printer-list #b111
))
1404 (emit-prefix segment prefix
)
1405 (emit-random-arith-inst "CMP" segment dst src
#b111 t
)))
1407 (define-instruction inc
(segment dst
)
1409 (:printer reg-no-width
((op #b01000
)))
1411 (:printer reg
/mem
((op '(#b1111111
#b000
))))
1413 (let ((size (operand-size dst
)))
1414 (maybe-emit-operand-size-prefix segment size
)
1415 (cond ((and (not (eq size
:byte
)) (register-p dst
))
1416 (emit-byte-with-reg segment
#b01000
(reg-tn-encoding dst
)))
1418 (emit-byte segment
(if (eq size
:byte
) #b11111110
#b11111111
))
1419 (emit-ea segment dst
#b000
))))))
1421 (define-instruction dec
(segment dst
)
1423 (:printer reg-no-width
((op #b01001
)))
1425 (:printer reg
/mem
((op '(#b1111111
#b001
))))
1427 (let ((size (operand-size dst
)))
1428 (maybe-emit-operand-size-prefix segment size
)
1429 (cond ((and (not (eq size
:byte
)) (register-p dst
))
1430 (emit-byte-with-reg segment
#b01001
(reg-tn-encoding dst
)))
1432 (emit-byte segment
(if (eq size
:byte
) #b11111110
#b11111111
))
1433 (emit-ea segment dst
#b001
))))))
1435 (define-instruction neg
(segment dst
)
1436 (:printer reg
/mem
((op '(#b1111011
#b011
))))
1438 (let ((size (operand-size dst
)))
1439 (maybe-emit-operand-size-prefix segment size
)
1440 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1441 (emit-ea segment dst
#b011
))))
1443 (define-instruction aaa
(segment)
1444 (:printer byte
((op #b00110111
)))
1446 (emit-byte segment
#b00110111
)))
1448 (define-instruction aas
(segment)
1449 (:printer byte
((op #b00111111
)))
1451 (emit-byte segment
#b00111111
)))
1453 (define-instruction daa
(segment)
1454 (:printer byte
((op #b00100111
)))
1456 (emit-byte segment
#b00100111
)))
1458 (define-instruction das
(segment)
1459 (:printer byte
((op #b00101111
)))
1461 (emit-byte segment
#b00101111
)))
1463 (define-instruction mul
(segment dst src
)
1464 (:printer accum-reg
/mem
((op '(#b1111011
#b100
))))
1466 (let ((size (matching-operand-size dst src
)))
1467 (aver (accumulator-p dst
))
1468 (maybe-emit-operand-size-prefix segment size
)
1469 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1470 (emit-ea segment src
#b100
))))
1472 (define-instruction imul
(segment dst
&optional src1 src2
)
1473 (:printer accum-reg
/mem
((op '(#b1111011
#b101
))))
1474 (:printer ext-reg-reg
/mem
((op #b1010111
)))
1475 (:printer reg-reg
/mem
((op #b0110100
) (width 1)
1476 (imm nil
:type
'signed-imm-word
))
1477 '(:name
:tab reg
", " reg
/mem
", " imm
))
1478 (:printer reg-reg
/mem
((op #b0110101
) (width 1)
1479 (imm nil
:type
'signed-imm-byte
))
1480 '(:name
:tab reg
", " reg
/mem
", " imm
))
1482 (flet ((r/m-with-immed-to-reg
(reg r
/m immed
)
1483 (let* ((size (matching-operand-size reg r
/m
))
1484 (sx (and (not (eq size
:byte
)) (<= -
128 immed
127))))
1485 (maybe-emit-operand-size-prefix segment size
)
1486 (emit-byte segment
(if sx
#b01101011
#b01101001
))
1487 (emit-ea segment r
/m
(reg-tn-encoding reg
))
1489 (emit-byte segment immed
)
1490 (emit-sized-immediate segment size immed
)))))
1492 (r/m-with-immed-to-reg dst src1 src2
))
1495 (r/m-with-immed-to-reg dst dst src1
)
1496 (let ((size (matching-operand-size dst src1
)))
1497 (maybe-emit-operand-size-prefix segment size
)
1498 (emit-byte segment
#b00001111
)
1499 (emit-byte segment
#b10101111
)
1500 (emit-ea segment src1
(reg-tn-encoding dst
)))))
1502 (let ((size (operand-size dst
)))
1503 (maybe-emit-operand-size-prefix segment size
)
1504 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1505 (emit-ea segment dst
#b101
)))))))
1507 (define-instruction div
(segment dst src
)
1508 (:printer accum-reg
/mem
((op '(#b1111011
#b110
))))
1510 (let ((size (matching-operand-size dst src
)))
1511 (aver (accumulator-p dst
))
1512 (maybe-emit-operand-size-prefix segment size
)
1513 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1514 (emit-ea segment src
#b110
))))
1516 (define-instruction idiv
(segment dst src
)
1517 (:printer accum-reg
/mem
((op '(#b1111011
#b111
))))
1519 (let ((size (matching-operand-size dst src
)))
1520 (aver (accumulator-p dst
))
1521 (maybe-emit-operand-size-prefix segment size
)
1522 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1523 (emit-ea segment src
#b111
))))
1525 (define-instruction aad
(segment)
1526 (:printer two-bytes
((op '(#b11010101
#b00001010
))))
1528 (emit-byte segment
#b11010101
)
1529 (emit-byte segment
#b00001010
)))
1531 (define-instruction aam
(segment)
1532 (:printer two-bytes
((op '(#b11010100
#b00001010
))))
1534 (emit-byte segment
#b11010100
)
1535 (emit-byte segment
#b00001010
)))
1537 (define-instruction bswap
(segment dst
)
1538 (:printer ext-reg-no-width
((op #b11001
)))
1540 (emit-byte segment
#x0f
)
1541 (emit-byte-with-reg segment
#b11001
(reg-tn-encoding dst
))))
1543 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1544 (define-instruction cbw
(segment)
1545 (:printer two-bytes
((op '(#b01100110
#b10011000
))))
1547 (maybe-emit-operand-size-prefix segment
:word
)
1548 (emit-byte segment
#b10011000
)))
1550 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1551 (define-instruction cwde
(segment)
1552 (:printer byte
((op #b10011000
)))
1554 (maybe-emit-operand-size-prefix segment
:dword
)
1555 (emit-byte segment
#b10011000
)))
1557 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1558 (define-instruction cwd
(segment)
1559 (:printer two-bytes
((op '(#b01100110
#b10011001
))))
1561 (maybe-emit-operand-size-prefix segment
:word
)
1562 (emit-byte segment
#b10011001
)))
1564 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1565 (define-instruction cdq
(segment)
1566 (:printer byte
((op #b10011001
)))
1568 (maybe-emit-operand-size-prefix segment
:dword
)
1569 (emit-byte segment
#b10011001
)))
1571 (define-instruction xadd
(segment dst src
&optional prefix
)
1572 ;; Register/Memory with Register.
1573 (:printer ext-reg-reg
/mem
((op #b1100000
)) '(:name
:tab reg
/mem
", " reg
))
1575 (aver (register-p src
))
1576 (emit-prefix segment prefix
)
1577 (let ((size (matching-operand-size src dst
)))
1578 (maybe-emit-operand-size-prefix segment size
)
1579 (emit-byte segment
#b00001111
)
1580 (emit-byte segment
(if (eq size
:byte
) #b11000000
#b11000001
))
1581 (emit-ea segment dst
(reg-tn-encoding src
)))))
1586 (defun emit-shift-inst (segment dst amount opcode
)
1587 (let ((size (operand-size dst
)))
1588 (maybe-emit-operand-size-prefix segment size
)
1589 (multiple-value-bind (major-opcode immed
)
1591 (:cl
(values #b11010010 nil
))
1592 (1 (values #b11010000 nil
))
1593 (t (values #b11000000 t
)))
1595 (if (eq size
:byte
) major-opcode
(logior major-opcode
1)))
1596 (emit-ea segment dst opcode
)
1598 (emit-byte segment amount
)))))
1600 (sb!disassem
:define-instruction-format
1601 (shift-inst 16 :include reg
/mem
1602 :default-printer
'(:name
:tab reg
/mem
", " (:if
(varying :positive
) 'cl
1)))
1603 (op :fields
(list (byte 6 2) (byte 3 11)))
1604 (varying :field
(byte 1 1)))
1606 (macrolet ((define (name subop
)
1607 `(define-instruction ,name
(segment dst amount
)
1608 (:printer shift-inst
((op '(#b110100
,subop
)))) ; shift by CL or 1
1609 (:printer reg
/mem-imm
((op '(#b1100000
,subop
))
1610 (imm nil
:type
'imm-byte
)))
1611 (:emitter
(emit-shift-inst segment dst amount
,subop
)))))
1620 (defun emit-double-shift (segment opcode dst src amt
)
1621 (let ((size (matching-operand-size dst src
)))
1622 (when (eq size
:byte
)
1623 (error "Double shifts can only be used with words."))
1624 (maybe-emit-operand-size-prefix segment size
)
1625 (emit-byte segment
#b00001111
)
1626 (emit-byte segment
(dpb opcode
(byte 1 3)
1627 (if (eq amt
:cl
) #b10100101
#b10100100
)))
1629 (emit-ea segment dst src
)
1630 (emit-ea segment dst
(reg-tn-encoding src
)) ; pw tries this
1631 (unless (eq amt
:cl
)
1632 (emit-byte segment amt
))))
1634 (eval-when (:compile-toplevel
:execute
)
1635 (defun double-shift-inst-printer-list (op)
1636 `((ext-reg-reg/mem
((op ,(logior op
#b10
)) (width 0)
1637 (imm nil
:type signed-imm-byte
))
1638 (:name
:tab reg
/mem
", " reg
", " imm
))
1639 (ext-reg-reg/mem
((op ,(logior op
#b10
)) (width 1))
1640 (:name
:tab reg
/mem
", " reg
", " 'cl
)))))
1642 (define-instruction shld
(segment dst src amt
)
1643 (:declare
(type (or (member :cl
) (mod 32)) amt
))
1644 (:printer-list
(double-shift-inst-printer-list #b1010000
))
1646 (emit-double-shift segment
#b0 dst src amt
)))
1648 (define-instruction shrd
(segment dst src amt
)
1649 (:declare
(type (or (member :cl
) (mod 32)) amt
))
1650 (:printer-list
(double-shift-inst-printer-list #b1010100
))
1652 (emit-double-shift segment
#b1 dst src amt
)))
1654 (define-instruction and
(segment dst src
)
1656 (arith-inst-printer-list #b100
))
1658 (emit-random-arith-inst "AND" segment dst src
#b100
)))
1660 (define-instruction test
(segment this that
)
1661 (:printer accum-imm
((op #b1010100
)))
1662 (:printer reg
/mem-imm
((op '(#b1111011
#b000
))))
1663 (:printer reg-reg
/mem
((op #b1000010
)))
1665 (let ((size (matching-operand-size this that
)))
1666 (maybe-emit-operand-size-prefix segment size
)
1667 (flet ((test-immed-and-something (immed something
)
1668 (cond ((accumulator-p something
)
1670 (if (eq size
:byte
) #b10101000
#b10101001
))
1671 (emit-sized-immediate segment size immed
))
1674 (if (eq size
:byte
) #b11110110
#b11110111
))
1675 (emit-ea segment something
#b000
)
1676 (emit-sized-immediate segment size immed
))))
1677 (test-reg-and-something (reg something
)
1678 (emit-byte segment
(if (eq size
:byte
) #b10000100
#b10000101
))
1679 (emit-ea segment something
(reg-tn-encoding reg
))))
1680 (cond ((integerp that
)
1681 (test-immed-and-something that this
))
1683 (test-immed-and-something this that
))
1685 (test-reg-and-something this that
))
1687 (test-reg-and-something that this
))
1689 (error "bogus operands for TEST: ~S and ~S" this that
)))))))
1691 ;;; Emit the most compact form of the test immediate instruction,
1692 ;;; using an 8 bit test when the immediate is only 8 bits and the
1693 ;;; value is one of the four low registers (eax, ebx, ecx, edx) or the
1695 (defun emit-optimized-test-inst (x y
)
1698 (let ((offset (tn-offset x
)))
1699 (cond ((and (sc-is x any-reg descriptor-reg
)
1700 (or (= offset eax-offset
) (= offset ebx-offset
)
1701 (= offset ecx-offset
) (= offset edx-offset
)))
1702 (inst test
(make-random-tn :kind
:normal
1703 :sc
(sc-or-lose 'byte-reg
)
1706 ((sc-is x control-stack
)
1707 (inst test
(make-ea :byte
:base ebp-tn
1708 :disp
(frame-byte-offset offset
))
1715 (define-instruction or
(segment dst src
&optional prefix
)
1717 (arith-inst-printer-list #b001
))
1719 (emit-prefix segment prefix
)
1720 (emit-random-arith-inst "OR" segment dst src
#b001
)))
1722 (define-instruction xor
(segment dst src
&optional prefix
)
1724 (arith-inst-printer-list #b110
))
1726 (emit-prefix segment prefix
)
1727 (emit-random-arith-inst "XOR" segment dst src
#b110
)))
1729 (define-instruction not
(segment dst
)
1730 (:printer reg
/mem
((op '(#b1111011
#b010
))))
1732 (let ((size (operand-size dst
)))
1733 (maybe-emit-operand-size-prefix segment size
)
1734 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
1735 (emit-ea segment dst
#b010
))))
1737 ;;;; string manipulation
1739 (define-instruction cmps
(segment size
)
1740 (:printer string-op
((op #b1010011
)))
1742 (maybe-emit-operand-size-prefix segment size
)
1743 (emit-byte segment
(if (eq size
:byte
) #b10100110
#b10100111
))))
1745 (define-instruction ins
(segment acc
)
1746 (:printer string-op
((op #b0110110
)))
1748 (let ((size (operand-size acc
)))
1749 (aver (accumulator-p acc
))
1750 (maybe-emit-operand-size-prefix segment size
)
1751 (emit-byte segment
(if (eq size
:byte
) #b01101100
#b01101101
)))))
1753 (define-instruction lods
(segment acc
)
1754 (:printer string-op
((op #b1010110
)))
1756 (let ((size (operand-size acc
)))
1757 (aver (accumulator-p acc
))
1758 (maybe-emit-operand-size-prefix segment size
)
1759 (emit-byte segment
(if (eq size
:byte
) #b10101100
#b10101101
)))))
1761 (define-instruction movs
(segment size
)
1762 (:printer string-op
((op #b1010010
)))
1764 (maybe-emit-operand-size-prefix segment size
)
1765 (emit-byte segment
(if (eq size
:byte
) #b10100100
#b10100101
))))
1767 (define-instruction outs
(segment acc
)
1768 (:printer string-op
((op #b0110111
)))
1770 (let ((size (operand-size acc
)))
1771 (aver (accumulator-p acc
))
1772 (maybe-emit-operand-size-prefix segment size
)
1773 (emit-byte segment
(if (eq size
:byte
) #b01101110
#b01101111
)))))
1775 (define-instruction scas
(segment acc
)
1776 (:printer string-op
((op #b1010111
)))
1778 (let ((size (operand-size acc
)))
1779 (aver (accumulator-p acc
))
1780 (maybe-emit-operand-size-prefix segment size
)
1781 (emit-byte segment
(if (eq size
:byte
) #b10101110
#b10101111
)))))
1783 (define-instruction stos
(segment acc
)
1784 (:printer string-op
((op #b1010101
)))
1786 (let ((size (operand-size acc
)))
1787 (aver (accumulator-p acc
))
1788 (maybe-emit-operand-size-prefix segment size
)
1789 (emit-byte segment
(if (eq size
:byte
) #b10101010
#b10101011
)))))
1791 (define-instruction xlat
(segment)
1792 (:printer byte
((op #b11010111
)))
1794 (emit-byte segment
#b11010111
)))
1797 ;;;; bit manipulation
1799 (define-instruction bsf
(segment dst src
)
1800 (:printer ext-reg-reg
/mem
((op #b1011110
) (width 0)))
1802 (let ((size (matching-operand-size dst src
)))
1803 (when (eq size
:byte
)
1804 (error "can't scan bytes: ~S" src
))
1805 (maybe-emit-operand-size-prefix segment size
)
1806 (emit-byte segment
#b00001111
)
1807 (emit-byte segment
#b10111100
)
1808 (emit-ea segment src
(reg-tn-encoding dst
)))))
1810 (define-instruction bsr
(segment dst src
)
1811 (:printer ext-reg-reg
/mem
((op #b1011110
) (width 1)))
1813 (let ((size (matching-operand-size dst src
)))
1814 (when (eq size
:byte
)
1815 (error "can't scan bytes: ~S" src
))
1816 (maybe-emit-operand-size-prefix segment size
)
1817 (emit-byte segment
#b00001111
)
1818 (emit-byte segment
#b10111101
)
1819 (emit-ea segment src
(reg-tn-encoding dst
)))))
1821 (defun emit-bit-test-and-mumble (segment src index opcode
)
1822 (let ((size (operand-size src
)))
1823 (when (eq size
:byte
)
1824 (error "can't scan bytes: ~S" src
))
1825 (maybe-emit-operand-size-prefix segment size
)
1826 (emit-byte segment
#b00001111
)
1827 (cond ((integerp index
)
1828 (emit-byte segment
#b10111010
)
1829 (emit-ea segment src opcode
)
1830 (emit-byte segment index
))
1832 (emit-byte segment
(dpb opcode
(byte 3 3) #b10000011
))
1833 (emit-ea segment src
(reg-tn-encoding index
))))))
1835 (eval-when (:compile-toplevel
:execute
)
1836 (defun bit-test-inst-printer-list (subop)
1837 `((ext-reg/mem-no-width
+imm8
((op (#xBA
,subop
))))
1838 (ext-reg-reg/mem-no-width
((op ,(dpb subop
(byte 3 3) #b10000011
))
1839 (reg/mem nil
:type sized-reg
/mem
))
1840 (:name
:tab reg
/mem
", " reg
)))))
1842 (macrolet ((define (inst opcode-extension
)
1843 `(define-instruction ,inst
(segment src index
)
1844 (:printer-list
(bit-test-inst-printer-list ,opcode-extension
))
1845 (:emitter
(emit-bit-test-and-mumble segment src index
1846 ,opcode-extension
)))))
1853 ;;;; control transfer
1855 (define-instruction call
(segment where
)
1856 (:printer near-jump
((op #b11101000
)))
1857 (:printer reg
/mem
((op '(#b1111111
#b010
)) (width 1)))
1861 (emit-byte segment
#b11101000
)
1862 (emit-back-patch segment
1864 (lambda (segment posn
)
1866 (- (label-position where
)
1869 (emit-byte segment
#b11101000
)
1870 (emit-relative-fixup segment where
))
1872 (emit-byte segment
#b11111111
)
1873 (emit-ea segment where
#b010
)))))
1875 (defun emit-byte-displacement-backpatch (segment target
)
1876 (emit-back-patch segment
1878 (lambda (segment posn
)
1879 (let ((disp (- (label-position target
) (1+ posn
))))
1880 (aver (<= -
128 disp
127))
1881 (emit-byte segment disp
)))))
1883 (define-instruction jmp
(segment cond
&optional where
)
1884 ;; conditional jumps
1885 (:printer short-cond-jump
((op #b0111
)) '('j cc
:tab label
))
1886 (:printer near-cond-jump
() '('j cc
:tab label
))
1887 ;; unconditional jumps
1888 (:printer short-jump
((op #b1011
)))
1889 (:printer near-jump
((op #b11101001
)) )
1890 (:printer reg
/mem
((op '(#b1111111
#b100
)) (width 1)))
1895 (lambda (segment posn delta-if-after
)
1896 (let ((disp (- (label-position where posn delta-if-after
)
1898 (when (<= -
128 disp
127)
1900 (dpb (conditional-opcode cond
)
1903 (emit-byte-displacement-backpatch segment where
)
1905 (lambda (segment posn
)
1906 (let ((disp (- (label-position where
) (+ posn
6))))
1907 (emit-byte segment
#b00001111
)
1909 (dpb (conditional-opcode cond
)
1912 (emit-dword segment disp
)))))
1913 ((label-p (setq where cond
))
1916 (lambda (segment posn delta-if-after
)
1917 (let ((disp (- (label-position where posn delta-if-after
)
1919 (when (<= -
128 disp
127)
1920 (emit-byte segment
#b11101011
)
1921 (emit-byte-displacement-backpatch segment where
)
1923 (lambda (segment posn
)
1924 (let ((disp (- (label-position where
) (+ posn
5))))
1925 (emit-byte segment
#b11101001
)
1926 (emit-dword segment disp
)))))
1928 (emit-byte segment
#b11101001
)
1929 (emit-relative-fixup segment where
))
1931 (unless (or (ea-p where
) (tn-p where
))
1932 (error "don't know what to do with ~A" where
))
1933 (emit-byte segment
#b11111111
)
1934 (emit-ea segment where
#b100
)))))
1936 (define-instruction jmp-short
(segment label
)
1938 (emit-byte segment
#b11101011
)
1939 (emit-byte-displacement-backpatch segment label
)))
1941 (define-instruction ret
(segment &optional stack-delta
)
1942 (:printer byte
((op #b11000011
)))
1943 (:printer byte
((op #b11000010
) (imm nil
:type
'imm-word-16
))
1946 (cond ((and stack-delta
(not (zerop stack-delta
)))
1947 (emit-byte segment
#b11000010
)
1948 (emit-word segment stack-delta
))
1950 (emit-byte segment
#b11000011
)))))
1952 (define-instruction jecxz
(segment target
)
1953 (:printer short-jump
((op #b0011
)))
1955 (emit-byte segment
#b11100011
)
1956 (emit-byte-displacement-backpatch segment target
)))
1958 (define-instruction loop
(segment target
)
1959 (:printer short-jump
((op #b0010
)))
1961 (emit-byte segment
#b11100010
) ; pfw this was 11100011, or jecxz!!!!
1962 (emit-byte-displacement-backpatch segment target
)))
1964 (define-instruction loopz
(segment target
)
1965 (:printer short-jump
((op #b0001
)))
1967 (emit-byte segment
#b11100001
)
1968 (emit-byte-displacement-backpatch segment target
)))
1970 (define-instruction loopnz
(segment target
)
1971 (:printer short-jump
((op #b0000
)))
1973 (emit-byte segment
#b11100000
)
1974 (emit-byte-displacement-backpatch segment target
)))
1976 ;;;; conditional move
1977 (define-instruction cmov
(segment cond dst src
)
1978 (:printer cond-move
())
1980 (aver (register-p dst
))
1981 (let ((size (matching-operand-size dst src
)))
1982 (aver (or (eq size
:word
) (eq size
:dword
)))
1983 (maybe-emit-operand-size-prefix segment size
))
1984 (emit-byte segment
#b00001111
)
1985 (emit-byte segment
(dpb (conditional-opcode cond
) (byte 4 0) #b01000000
))
1986 (emit-ea segment src
(reg-tn-encoding dst
))))
1988 ;;;; conditional byte set
1990 (define-instruction set
(segment dst cond
)
1991 (:printer cond-set
())
1993 (emit-byte segment
#b00001111
)
1994 (emit-byte segment
(dpb (conditional-opcode cond
) (byte 4 0) #b10010000
))
1995 (emit-ea segment dst
#b000
)))
1999 (define-instruction enter
(segment disp
&optional
(level 0))
2000 (:declare
(type (unsigned-byte 16) disp
)
2001 (type (unsigned-byte 8) level
))
2002 (:printer enter-format
((op #b11001000
)))
2004 (emit-byte segment
#b11001000
)
2005 (emit-word segment disp
)
2006 (emit-byte segment level
)))
2008 (define-instruction leave
(segment)
2009 (:printer byte
((op #b11001001
)))
2011 (emit-byte segment
#b11001001
)))
2014 (define-instruction prefetchnta
(segment ea
)
2015 (:printer prefetch
((op #b00011000
) (reg #b000
)))
2017 (aver (typep ea
'ea
))
2018 (aver (eq :byte
(ea-size ea
)))
2019 (emit-byte segment
#b00001111
)
2020 (emit-byte segment
#b00011000
)
2021 (emit-ea segment ea
#b000
)))
2023 (define-instruction prefetcht0
(segment ea
)
2024 (:printer prefetch
((op #b00011000
) (reg #b001
)))
2026 (aver (typep ea
'ea
))
2027 (aver (eq :byte
(ea-size ea
)))
2028 (emit-byte segment
#b00001111
)
2029 (emit-byte segment
#b00011000
)
2030 (emit-ea segment ea
#b001
)))
2032 (define-instruction prefetcht1
(segment ea
)
2033 (:printer prefetch
((op #b00011000
) (reg #b010
)))
2035 (aver (typep ea
'ea
))
2036 (aver (eq :byte
(ea-size ea
)))
2037 (emit-byte segment
#b00001111
)
2038 (emit-byte segment
#b00011000
)
2039 (emit-ea segment ea
#b010
)))
2041 (define-instruction prefetcht2
(segment ea
)
2042 (:printer prefetch
((op #b00011000
) (reg #b011
)))
2044 (aver (typep ea
'ea
))
2045 (aver (eq :byte
(ea-size ea
)))
2046 (emit-byte segment
#b00001111
)
2047 (emit-byte segment
#b00011000
)
2048 (emit-ea segment ea
#b011
)))
2050 ;;;; interrupt instructions
2052 (defun snarf-error-junk (sap offset
&optional length-only
)
2053 (let* ((length (sap-ref-8 sap offset
))
2054 (vector (make-array length
:element-type
'(unsigned-byte 8))))
2055 (declare (type system-area-pointer sap
)
2056 (type (unsigned-byte 8) length
)
2057 (type (simple-array (unsigned-byte 8) (*)) vector
))
2059 (values 0 (1+ length
) nil nil
))
2061 (copy-ub8-from-system-area sap
(1+ offset
) vector
0 length
)
2062 (collect ((sc-offsets)
2064 (lengths 1) ; the length byte
2066 (error-number (read-var-integer vector index
)))
2069 (when (>= index length
)
2071 (let ((old-index index
))
2072 (sc-offsets (read-var-integer vector index
))
2073 (lengths (- index old-index
))))
2074 (values error-number
2080 (defmacro break-cases
(breaknum &body cases
)
2081 (let ((bn-temp (gensym)))
2082 (collect ((clauses))
2083 (dolist (case cases
)
2084 (clauses `((= ,bn-temp
,(car case
)) ,@(cdr case
))))
2085 `(let ((,bn-temp
,breaknum
))
2086 (cond ,@(clauses))))))
2089 (defun break-control (chunk inst stream dstate
)
2090 (declare (ignore inst
))
2091 (flet ((nt (x) (if stream
(sb!disassem
:note x dstate
))))
2092 (case #!-ud2-breakpoints
(byte-imm-code chunk dstate
)
2093 #!+ud2-breakpoints
(word-imm-code chunk dstate
)
2096 (sb!disassem
:handle-break-args
#'snarf-error-junk stream dstate
))
2099 (sb!disassem
:handle-break-args
#'snarf-error-junk stream dstate
))
2101 (nt "breakpoint trap"))
2102 (#.pending-interrupt-trap
2103 (nt "pending interrupt trap"))
2106 (#.fun-end-breakpoint-trap
2107 (nt "function end breakpoint trap")))))
2109 (define-instruction break
(segment code
)
2110 (:declare
(type (unsigned-byte 8) code
))
2111 #!-ud2-breakpoints
(:printer byte-imm
((op #b11001100
))
2112 '(:name
:tab code
) :control
#'break-control
)
2113 #!+ud2-breakpoints
(:printer word-imm
((op #b0000101100001111
))
2114 '(:name
:tab code
) :control
#'break-control
)
2116 #!-ud2-breakpoints
(emit-byte segment
#b11001100
)
2117 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2118 ;; throw a sigill with 0x0b0f instead and check for this in the
2119 ;; SIGILL handler and pass it on to the sigtrap handler if
2121 #!+ud2-breakpoints
(emit-word segment
#b0000101100001111
)
2122 (emit-byte segment code
)))
2124 (define-instruction int
(segment number
)
2125 (:declare
(type (unsigned-byte 8) number
))
2126 (:printer byte-imm
((op #b11001101
)))
2130 (emit-byte segment
#b11001100
))
2132 (emit-byte segment
#b11001101
)
2133 (emit-byte segment number
)))))
2135 (define-instruction into
(segment)
2136 (:printer byte
((op #b11001110
)))
2138 (emit-byte segment
#b11001110
)))
2140 (define-instruction bound
(segment reg bounds
)
2142 (let ((size (matching-operand-size reg bounds
)))
2143 (when (eq size
:byte
)
2144 (error "can't bounds-test bytes: ~S" reg
))
2145 (maybe-emit-operand-size-prefix segment size
)
2146 (emit-byte segment
#b01100010
)
2147 (emit-ea segment bounds
(reg-tn-encoding reg
)))))
2149 (define-instruction iret
(segment)
2150 (:printer byte
((op #b11001111
)))
2152 (emit-byte segment
#b11001111
)))
2154 ;;;; processor control
2156 (define-instruction hlt
(segment)
2157 (:printer byte
((op #b11110100
)))
2159 (emit-byte segment
#b11110100
)))
2161 (define-instruction nop
(segment)
2162 (:printer byte
((op #b10010000
)))
2164 (emit-byte segment
#b10010000
)))
2166 (define-instruction wait
(segment)
2167 (:printer byte
((op #b10011011
)))
2169 (emit-byte segment
#b10011011
)))
2171 ;;;; miscellaneous hackery
2173 (define-instruction byte
(segment byte
)
2175 (emit-byte segment byte
)))
2177 (define-instruction word
(segment word
)
2179 (emit-word segment word
)))
2181 (define-instruction dword
(segment dword
)
2183 (emit-dword segment dword
)))
2185 (defun emit-header-data (segment type
)
2186 (emit-back-patch segment
2188 (lambda (segment posn
)
2192 (component-header-length))
2196 (define-instruction simple-fun-header-word
(segment)
2198 (emit-header-data segment simple-fun-header-widetag
)))
2200 (define-instruction lra-header-word
(segment)
2202 (emit-header-data segment return-pc-header-widetag
)))
2204 ;;;; fp instructions
2206 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
2208 ;;;; Note: We treat the single-precision and double-precision variants
2209 ;;;; as separate instructions.
2211 ;;; Load single to st(0).
2212 (define-instruction fld
(segment source
)
2213 (:printer floating-point
((op '(#b001
#b000
))))
2215 (emit-byte segment
#b11011001
)
2216 (emit-fp-op segment source
#b000
)))
2218 ;;; Load double to st(0).
2219 (define-instruction fldd
(segment source
)
2220 (:printer floating-point
((op '(#b101
#b000
))))
2221 (:printer floating-point-fp
((op '(#b001
#b000
))))
2223 (if (fp-reg-tn-p source
)
2224 (emit-byte segment
#b11011001
)
2225 (emit-byte segment
#b11011101
))
2226 (emit-fp-op segment source
#b000
)))
2228 ;;; Load long to st(0).
2229 (define-instruction fldl
(segment source
)
2230 (:printer floating-point
((op '(#b011
#b101
))))
2232 (emit-byte segment
#b11011011
)
2233 (emit-fp-op segment source
#b101
)))
2235 ;;; Store single from st(0).
2236 (define-instruction fst
(segment dest
)
2237 (:printer floating-point
((op '(#b001
#b010
))))
2239 (cond ((fp-reg-tn-p dest
)
2240 (emit-byte segment
#b11011101
)
2241 (emit-fp-op segment dest
#b010
))
2243 (emit-byte segment
#b11011001
)
2244 (emit-fp-op segment dest
#b010
)))))
2246 ;;; Store double from st(0).
2247 (define-instruction fstd
(segment dest
)
2248 (:printer floating-point
((op '(#b101
#b010
))))
2249 (:printer floating-point-fp
((op '(#b101
#b010
))))
2251 (cond ((fp-reg-tn-p dest
)
2252 (emit-byte segment
#b11011101
)
2253 (emit-fp-op segment dest
#b010
))
2255 (emit-byte segment
#b11011101
)
2256 (emit-fp-op segment dest
#b010
)))))
2258 ;;; Arithmetic ops are all done with at least one operand at top of
2259 ;;; stack. The other operand is is another register or a 32/64 bit
2262 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2263 ;;; that these conflict with the Gdb conventions for binops. To reduce
2264 ;;; the confusion I've added comments showing the mathamatical
2265 ;;; operation and the two syntaxes. By the ASM386 convention the
2266 ;;; instruction syntax is:
2269 ;;; or Fop Destination, Source
2271 ;;; If only one operand is given then it is the source and the
2272 ;;; destination is ST(0). There are reversed forms of the fsub and
2273 ;;; fdiv instructions inducated by an 'R' suffix.
2275 ;;; The mathematical operation for the non-reverse form is always:
2276 ;;; destination = destination op source
2278 ;;; For the reversed form it is:
2279 ;;; destination = source op destination
2281 ;;; The instructions below only accept one operand at present which is
2282 ;;; usually the source. I've hack in extra instructions to implement
2283 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2284 ;;; the operand is the destination with the source being ST(0).
2287 ;;; st(0) = st(0) + memory or st(i).
2288 (define-instruction fadd
(segment source
)
2289 (:printer floating-point
((op '(#b000
#b000
))))
2291 (emit-byte segment
#b11011000
)
2292 (emit-fp-op segment source
#b000
)))
2295 ;;; st(0) = st(0) + memory or st(i).
2296 (define-instruction faddd
(segment source
)
2297 (:printer floating-point
((op '(#b100
#b000
))))
2298 (:printer floating-point-fp
((op '(#b000
#b000
))))
2300 (if (fp-reg-tn-p source
)
2301 (emit-byte segment
#b11011000
)
2302 (emit-byte segment
#b11011100
))
2303 (emit-fp-op segment source
#b000
)))
2305 ;;; Add double destination st(i):
2306 ;;; st(i) = st(0) + st(i).
2307 (define-instruction fadd-sti
(segment destination
)
2308 (:printer floating-point-fp
((op '(#b100
#b000
))))
2310 (aver (fp-reg-tn-p destination
))
2311 (emit-byte segment
#b11011100
)
2312 (emit-fp-op segment destination
#b000
)))
2314 (define-instruction faddp-sti
(segment destination
)
2315 (:printer floating-point-fp
((op '(#b110
#b000
))))
2317 (aver (fp-reg-tn-p destination
))
2318 (emit-byte segment
#b11011110
)
2319 (emit-fp-op segment destination
#b000
)))
2321 ;;; Subtract single:
2322 ;;; st(0) = st(0) - memory or st(i).
2323 (define-instruction fsub
(segment source
)
2324 (:printer floating-point
((op '(#b000
#b100
))))
2326 (emit-byte segment
#b11011000
)
2327 (emit-fp-op segment source
#b100
)))
2329 ;;; Subtract single, reverse:
2330 ;;; st(0) = memory or st(i) - st(0).
2331 (define-instruction fsubr
(segment source
)
2332 (:printer floating-point
((op '(#b000
#b101
))))
2334 (emit-byte segment
#b11011000
)
2335 (emit-fp-op segment source
#b101
)))
2337 ;;; Subtract double:
2338 ;;; st(0) = st(0) - memory or st(i).
2339 (define-instruction fsubd
(segment source
)
2340 (:printer floating-point
((op '(#b100
#b100
))))
2341 (:printer floating-point-fp
((op '(#b000
#b100
))))
2343 (if (fp-reg-tn-p source
)
2344 (emit-byte segment
#b11011000
)
2345 (emit-byte segment
#b11011100
))
2346 (emit-fp-op segment source
#b100
)))
2348 ;;; Subtract double, reverse:
2349 ;;; st(0) = memory or st(i) - st(0).
2350 (define-instruction fsubrd
(segment source
)
2351 (:printer floating-point
((op '(#b100
#b101
))))
2352 (:printer floating-point-fp
((op '(#b000
#b101
))))
2354 (if (fp-reg-tn-p source
)
2355 (emit-byte segment
#b11011000
)
2356 (emit-byte segment
#b11011100
))
2357 (emit-fp-op segment source
#b101
)))
2359 ;;; Subtract double, destination st(i):
2360 ;;; st(i) = st(i) - st(0).
2362 ;;; ASM386 syntax: FSUB ST(i), ST
2363 ;;; Gdb syntax: fsubr %st,%st(i)
2364 (define-instruction fsub-sti
(segment destination
)
2365 (:printer floating-point-fp
((op '(#b100
#b101
))))
2367 (aver (fp-reg-tn-p destination
))
2368 (emit-byte segment
#b11011100
)
2369 (emit-fp-op segment destination
#b101
)))
2371 (define-instruction fsubp-sti
(segment destination
)
2372 (:printer floating-point-fp
((op '(#b110
#b101
))))
2374 (aver (fp-reg-tn-p destination
))
2375 (emit-byte segment
#b11011110
)
2376 (emit-fp-op segment destination
#b101
)))
2378 ;;; Subtract double, reverse, destination st(i):
2379 ;;; st(i) = st(0) - st(i).
2381 ;;; ASM386 syntax: FSUBR ST(i), ST
2382 ;;; Gdb syntax: fsub %st,%st(i)
2383 (define-instruction fsubr-sti
(segment destination
)
2384 (:printer floating-point-fp
((op '(#b100
#b100
))))
2386 (aver (fp-reg-tn-p destination
))
2387 (emit-byte segment
#b11011100
)
2388 (emit-fp-op segment destination
#b100
)))
2390 (define-instruction fsubrp-sti
(segment destination
)
2391 (:printer floating-point-fp
((op '(#b110
#b100
))))
2393 (aver (fp-reg-tn-p destination
))
2394 (emit-byte segment
#b11011110
)
2395 (emit-fp-op segment destination
#b100
)))
2397 ;;; Multiply single:
2398 ;;; st(0) = st(0) * memory or st(i).
2399 (define-instruction fmul
(segment source
)
2400 (:printer floating-point
((op '(#b000
#b001
))))
2402 (emit-byte segment
#b11011000
)
2403 (emit-fp-op segment source
#b001
)))
2405 ;;; Multiply double:
2406 ;;; st(0) = st(0) * memory or st(i).
2407 (define-instruction fmuld
(segment source
)
2408 (:printer floating-point
((op '(#b100
#b001
))))
2409 (:printer floating-point-fp
((op '(#b000
#b001
))))
2411 (if (fp-reg-tn-p source
)
2412 (emit-byte segment
#b11011000
)
2413 (emit-byte segment
#b11011100
))
2414 (emit-fp-op segment source
#b001
)))
2416 ;;; Multiply double, destination st(i):
2417 ;;; st(i) = st(i) * st(0).
2418 (define-instruction fmul-sti
(segment destination
)
2419 (:printer floating-point-fp
((op '(#b100
#b001
))))
2421 (aver (fp-reg-tn-p destination
))
2422 (emit-byte segment
#b11011100
)
2423 (emit-fp-op segment destination
#b001
)))
2426 ;;; st(0) = st(0) / memory or st(i).
2427 (define-instruction fdiv
(segment source
)
2428 (:printer floating-point
((op '(#b000
#b110
))))
2430 (emit-byte segment
#b11011000
)
2431 (emit-fp-op segment source
#b110
)))
2433 ;;; Divide single, reverse:
2434 ;;; st(0) = memory or st(i) / st(0).
2435 (define-instruction fdivr
(segment source
)
2436 (:printer floating-point
((op '(#b000
#b111
))))
2438 (emit-byte segment
#b11011000
)
2439 (emit-fp-op segment source
#b111
)))
2442 ;;; st(0) = st(0) / memory or st(i).
2443 (define-instruction fdivd
(segment source
)
2444 (:printer floating-point
((op '(#b100
#b110
))))
2445 (:printer floating-point-fp
((op '(#b000
#b110
))))
2447 (if (fp-reg-tn-p source
)
2448 (emit-byte segment
#b11011000
)
2449 (emit-byte segment
#b11011100
))
2450 (emit-fp-op segment source
#b110
)))
2452 ;;; Divide double, reverse:
2453 ;;; st(0) = memory or st(i) / st(0).
2454 (define-instruction fdivrd
(segment source
)
2455 (:printer floating-point
((op '(#b100
#b111
))))
2456 (:printer floating-point-fp
((op '(#b000
#b111
))))
2458 (if (fp-reg-tn-p source
)
2459 (emit-byte segment
#b11011000
)
2460 (emit-byte segment
#b11011100
))
2461 (emit-fp-op segment source
#b111
)))
2463 ;;; Divide double, destination st(i):
2464 ;;; st(i) = st(i) / st(0).
2466 ;;; ASM386 syntax: FDIV ST(i), ST
2467 ;;; Gdb syntax: fdivr %st,%st(i)
2468 (define-instruction fdiv-sti
(segment destination
)
2469 (:printer floating-point-fp
((op '(#b100
#b111
))))
2471 (aver (fp-reg-tn-p destination
))
2472 (emit-byte segment
#b11011100
)
2473 (emit-fp-op segment destination
#b111
)))
2475 ;;; Divide double, reverse, destination st(i):
2476 ;;; st(i) = st(0) / st(i).
2478 ;;; ASM386 syntax: FDIVR ST(i), ST
2479 ;;; Gdb syntax: fdiv %st,%st(i)
2480 (define-instruction fdivr-sti
(segment destination
)
2481 (:printer floating-point-fp
((op '(#b100
#b110
))))
2483 (aver (fp-reg-tn-p destination
))
2484 (emit-byte segment
#b11011100
)
2485 (emit-fp-op segment destination
#b110
)))
2487 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2488 (define-instruction fxch
(segment source
)
2489 (:printer floating-point-fp
((op '(#b001
#b001
))))
2491 (aver (and (tn-p source
)
2492 (eq (sb-name (sc-sb (tn-sc source
))) 'float-registers
)))
2493 (emit-byte segment
#b11011001
)
2494 (emit-fp-op segment source
#b001
)))
2496 ;;; Push 32-bit integer to st0.
2497 (define-instruction fild
(segment source
)
2498 (:printer floating-point
((op '(#b011
#b000
))))
2500 (emit-byte segment
#b11011011
)
2501 (emit-fp-op segment source
#b000
)))
2503 ;;; Push 64-bit integer to st0.
2504 (define-instruction fildl
(segment source
)
2505 (:printer floating-point
((op '(#b111
#b101
))))
2507 (emit-byte segment
#b11011111
)
2508 (emit-fp-op segment source
#b101
)))
2510 ;;; Store 32-bit integer.
2511 (define-instruction fist
(segment dest
)
2512 (:printer floating-point
((op '(#b011
#b010
))))
2514 (emit-byte segment
#b11011011
)
2515 (emit-fp-op segment dest
#b010
)))
2517 ;;; Store and pop 32-bit integer.
2518 (define-instruction fistp
(segment dest
)
2519 (:printer floating-point
((op '(#b011
#b011
))))
2521 (emit-byte segment
#b11011011
)
2522 (emit-fp-op segment dest
#b011
)))
2524 ;;; Store and pop 64-bit integer.
2525 (define-instruction fistpl
(segment dest
)
2526 (:printer floating-point
((op '(#b111
#b111
))))
2528 (emit-byte segment
#b11011111
)
2529 (emit-fp-op segment dest
#b111
)))
2531 ;;; Store single from st(0) and pop.
2532 (define-instruction fstp
(segment dest
)
2533 (:printer floating-point
((op '(#b001
#b011
))))
2535 (cond ((fp-reg-tn-p dest
)
2536 (emit-byte segment
#b11011101
)
2537 (emit-fp-op segment dest
#b011
))
2539 (emit-byte segment
#b11011001
)
2540 (emit-fp-op segment dest
#b011
)))))
2542 ;;; Store double from st(0) and pop.
2543 (define-instruction fstpd
(segment dest
)
2544 (:printer floating-point
((op '(#b101
#b011
))))
2545 (:printer floating-point-fp
((op '(#b101
#b011
))))
2547 (cond ((fp-reg-tn-p dest
)
2548 (emit-byte segment
#b11011101
)
2549 (emit-fp-op segment dest
#b011
))
2551 (emit-byte segment
#b11011101
)
2552 (emit-fp-op segment dest
#b011
)))))
2554 ;;; Store long from st(0) and pop.
2555 (define-instruction fstpl
(segment dest
)
2556 (:printer floating-point
((op '(#b011
#b111
))))
2558 (emit-byte segment
#b11011011
)
2559 (emit-fp-op segment dest
#b111
)))
2561 ;;; Decrement stack-top pointer.
2562 (define-instruction fdecstp
(segment)
2563 (:printer floating-point-no
((op #b10110
)))
2565 (emit-byte segment
#b11011001
)
2566 (emit-byte segment
#b11110110
)))
2568 ;;; Increment stack-top pointer.
2569 (define-instruction fincstp
(segment)
2570 (:printer floating-point-no
((op #b10111
)))
2572 (emit-byte segment
#b11011001
)
2573 (emit-byte segment
#b11110111
)))
2575 ;;; Free fp register.
2576 (define-instruction ffree
(segment dest
)
2577 (:printer floating-point-fp
((op '(#b101
#b000
))))
2579 (emit-byte segment
#b11011101
)
2580 (emit-fp-op segment dest
#b000
)))
2582 (define-instruction fabs
(segment)
2583 (:printer floating-point-no
((op #b00001
)))
2585 (emit-byte segment
#b11011001
)
2586 (emit-byte segment
#b11100001
)))
2588 (define-instruction fchs
(segment)
2589 (:printer floating-point-no
((op #b00000
)))
2591 (emit-byte segment
#b11011001
)
2592 (emit-byte segment
#b11100000
)))
2594 (define-instruction frndint
(segment)
2595 (:printer floating-point-no
((op #b11100
)))
2597 (emit-byte segment
#b11011001
)
2598 (emit-byte segment
#b11111100
)))
2601 (define-instruction fninit
(segment)
2602 (:printer floating-point-5
((op #b00011
)))
2604 (emit-byte segment
#b11011011
)
2605 (emit-byte segment
#b11100011
)))
2607 ;;; Store Status Word to AX.
2608 (define-instruction fnstsw
(segment)
2609 (:printer floating-point-st
((op #b00000
)))
2611 (emit-byte segment
#b11011111
)
2612 (emit-byte segment
#b11100000
)))
2614 ;;; Load Control Word.
2616 ;;; src must be a memory location
2617 (define-instruction fldcw
(segment src
)
2618 (:printer floating-point
((op '(#b001
#b101
))))
2620 (emit-byte segment
#b11011001
)
2621 (emit-fp-op segment src
#b101
)))
2623 ;;; Store Control Word.
2624 (define-instruction fnstcw
(segment dst
)
2625 (:printer floating-point
((op '(#b001
#b111
))))
2627 (emit-byte segment
#b11011001
)
2628 (emit-fp-op segment dst
#b111
)))
2630 ;;; Store FP Environment.
2631 (define-instruction fstenv
(segment dst
)
2632 (:printer floating-point
((op '(#b001
#b110
))))
2634 (emit-byte segment
#b11011001
)
2635 (emit-fp-op segment dst
#b110
)))
2637 ;;; Restore FP Environment.
2638 (define-instruction fldenv
(segment src
)
2639 (:printer floating-point
((op '(#b001
#b100
))))
2641 (emit-byte segment
#b11011001
)
2642 (emit-fp-op segment src
#b100
)))
2645 (define-instruction fsave
(segment dst
)
2646 (:printer floating-point
((op '(#b101
#b110
))))
2648 (emit-byte segment
#b11011101
)
2649 (emit-fp-op segment dst
#b110
)))
2651 ;;; Restore FP State.
2652 (define-instruction frstor
(segment src
)
2653 (:printer floating-point
((op '(#b101
#b100
))))
2655 (emit-byte segment
#b11011101
)
2656 (emit-fp-op segment src
#b100
)))
2658 ;;; Clear exceptions.
2659 (define-instruction fnclex
(segment)
2660 (:printer floating-point-5
((op #b00010
)))
2662 (emit-byte segment
#b11011011
)
2663 (emit-byte segment
#b11100010
)))
2666 (define-instruction fcom
(segment src
)
2667 (:printer floating-point
((op '(#b000
#b010
))))
2669 (emit-byte segment
#b11011000
)
2670 (emit-fp-op segment src
#b010
)))
2672 (define-instruction fcomd
(segment src
)
2673 (:printer floating-point
((op '(#b100
#b010
))))
2674 (:printer floating-point-fp
((op '(#b000
#b010
))))
2676 (if (fp-reg-tn-p src
)
2677 (emit-byte segment
#b11011000
)
2678 (emit-byte segment
#b11011100
))
2679 (emit-fp-op segment src
#b010
)))
2681 ;;; Compare ST1 to ST0, popping the stack twice.
2682 (define-instruction fcompp
(segment)
2683 (:printer floating-point-3
((op '(#b110
#b011001
))))
2685 (emit-byte segment
#b11011110
)
2686 (emit-byte segment
#b11011001
)))
2688 ;;; unordered comparison
2689 (define-instruction fucom
(segment src
)
2690 (:printer floating-point-fp
((op '(#b101
#b100
))))
2692 (aver (fp-reg-tn-p src
))
2693 (emit-byte segment
#b11011101
)
2694 (emit-fp-op segment src
#b100
)))
2696 (define-instruction ftst
(segment)
2697 (:printer floating-point-no
((op #b00100
)))
2699 (emit-byte segment
#b11011001
)
2700 (emit-byte segment
#b11100100
)))
2704 (define-instruction fsqrt
(segment)
2705 (:printer floating-point-no
((op #b11010
)))
2707 (emit-byte segment
#b11011001
)
2708 (emit-byte segment
#b11111010
)))
2710 (define-instruction fscale
(segment)
2711 (:printer floating-point-no
((op #b11101
)))
2713 (emit-byte segment
#b11011001
)
2714 (emit-byte segment
#b11111101
)))
2716 (define-instruction fxtract
(segment)
2717 (:printer floating-point-no
((op #b10100
)))
2719 (emit-byte segment
#b11011001
)
2720 (emit-byte segment
#b11110100
)))
2722 (define-instruction fsin
(segment)
2723 (:printer floating-point-no
((op #b11110
)))
2725 (emit-byte segment
#b11011001
)
2726 (emit-byte segment
#b11111110
)))
2728 (define-instruction fcos
(segment)
2729 (:printer floating-point-no
((op #b11111
)))
2731 (emit-byte segment
#b11011001
)
2732 (emit-byte segment
#b11111111
)))
2734 (define-instruction fprem1
(segment)
2735 (:printer floating-point-no
((op #b10101
)))
2737 (emit-byte segment
#b11011001
)
2738 (emit-byte segment
#b11110101
)))
2740 (define-instruction fprem
(segment)
2741 (:printer floating-point-no
((op #b11000
)))
2743 (emit-byte segment
#b11011001
)
2744 (emit-byte segment
#b11111000
)))
2746 (define-instruction fxam
(segment)
2747 (:printer floating-point-no
((op #b00101
)))
2749 (emit-byte segment
#b11011001
)
2750 (emit-byte segment
#b11100101
)))
2752 ;;; These do push/pop to stack and need special handling
2753 ;;; in any VOPs that use them. See the book.
2755 ;;; st0 <- st1*log2(st0)
2756 (define-instruction fyl2x
(segment) ; pops stack
2757 (:printer floating-point-no
((op #b10001
)))
2759 (emit-byte segment
#b11011001
)
2760 (emit-byte segment
#b11110001
)))
2762 (define-instruction fyl2xp1
(segment)
2763 (:printer floating-point-no
((op #b11001
)))
2765 (emit-byte segment
#b11011001
)
2766 (emit-byte segment
#b11111001
)))
2768 (define-instruction f2xm1
(segment)
2769 (:printer floating-point-no
((op #b10000
)))
2771 (emit-byte segment
#b11011001
)
2772 (emit-byte segment
#b11110000
)))
2774 (define-instruction fptan
(segment) ; st(0) <- 1; st(1) <- tan
2775 (:printer floating-point-no
((op #b10010
)))
2777 (emit-byte segment
#b11011001
)
2778 (emit-byte segment
#b11110010
)))
2780 (define-instruction fpatan
(segment) ; POPS STACK
2781 (:printer floating-point-no
((op #b10011
)))
2783 (emit-byte segment
#b11011001
)
2784 (emit-byte segment
#b11110011
)))
2786 ;;;; loading constants
2788 (define-instruction fldz
(segment)
2789 (:printer floating-point-no
((op #b01110
)))
2791 (emit-byte segment
#b11011001
)
2792 (emit-byte segment
#b11101110
)))
2794 (define-instruction fld1
(segment)
2795 (:printer floating-point-no
((op #b01000
)))
2797 (emit-byte segment
#b11011001
)
2798 (emit-byte segment
#b11101000
)))
2800 (define-instruction fldpi
(segment)
2801 (:printer floating-point-no
((op #b01011
)))
2803 (emit-byte segment
#b11011001
)
2804 (emit-byte segment
#b11101011
)))
2806 (define-instruction fldl2t
(segment)
2807 (:printer floating-point-no
((op #b01001
)))
2809 (emit-byte segment
#b11011001
)
2810 (emit-byte segment
#b11101001
)))
2812 (define-instruction fldl2e
(segment)
2813 (:printer floating-point-no
((op #b01010
)))
2815 (emit-byte segment
#b11011001
)
2816 (emit-byte segment
#b11101010
)))
2818 (define-instruction fldlg2
(segment)
2819 (:printer floating-point-no
((op #b01100
)))
2821 (emit-byte segment
#b11011001
)
2822 (emit-byte segment
#b11101100
)))
2824 (define-instruction fldln2
(segment)
2825 (:printer floating-point-no
((op #b01101
)))
2827 (emit-byte segment
#b11011001
)
2828 (emit-byte segment
#b11101101
)))
2832 (define-instruction cpuid
(segment)
2833 (:printer two-bytes
((op '(#b00001111
#b10100010
))))
2835 (emit-byte segment
#b00001111
)
2836 (emit-byte segment
#b10100010
)))
2838 (define-instruction rdtsc
(segment)
2839 (:printer two-bytes
((op '(#b00001111
#b00110001
))))
2841 (emit-byte segment
#b00001111
)
2842 (emit-byte segment
#b00110001
)))
2844 ;;;; Late VM definitions
2845 (defun canonicalize-inline-constant (constant)
2846 (let ((first (car constant
)))
2848 (single-float (setf constant
(list :single-float first
)))
2849 (double-float (setf constant
(list :double-float first
)))))
2850 (destructuring-bind (type value
) constant
2852 ((:byte
:word
:dword
)
2853 (aver (integerp value
))
2856 #!+sb-unicode
(aver (base-char-p value
))
2857 (cons :byte
(char-code value
)))
2859 (aver (characterp value
))
2860 (cons :dword
(char-code value
)))
2862 (aver (typep value
'single-float
))
2863 (cons :dword
(ldb (byte 32 0) (single-float-bits value
))))
2864 ((:double-float-bits
)
2865 (aver (integerp value
))
2866 (cons :double-float
(ldb (byte 64 0) value
)))
2868 (aver (typep value
'double-float
))
2870 (ldb (byte 64 0) (logior (ash (double-float-high-bits value
) 32)
2871 (double-float-low-bits value
))))))))
2873 (defun inline-constant-value (constant)
2874 (let ((label (gen-label))
2875 (size (ecase (car constant
)
2876 ((:byte
:word
:dword
) (car constant
))
2877 (:double-float
:dword
))))
2878 (values label
(make-ea size
2879 :disp
(make-fixup nil
:code-object label
)))))
2881 (defun emit-constant-segment-header (segment constants optimize
)
2882 (declare (ignore segment constants
))
2883 (loop repeat
(if optimize
64 16) do
(inst byte
#x90
)))
2885 (defun size-nbyte (size)
2892 (defun sort-inline-constants (constants)
2893 (stable-sort constants
#'> :key
(lambda (constant)
2894 (size-nbyte (caar constant
)))))
2896 (defun emit-inline-constant (constant label
)
2897 (let ((size (size-nbyte (car constant
))))
2898 (emit-alignment (integer-length (1- size
)))
2900 (let ((val (cdr constant
)))
2902 do
(inst byte
(ldb (byte 8 0) val
))
2903 (setf val
(ash val -
8))))))