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 ;;; Disassembling x86 code needs to take into account little things
44 ;;; like instructions that have a byte/word length bit in their
45 ;;; encoding, prefixes to change the default word length for a single
46 ;;; instruction, and so on. Unfortunately, there is no easy way with
47 ;;; this disassembler framework to handle prefixes that will work
48 ;;; correctly in all cases, so we copy the x86-64 version which at
49 ;;; least can handle the code output by the compiler.
51 ;;; Width information for an instruction is stored as an inst-prop on
52 ;;; the dstate. The inst-props are cleared automatically after each
53 ;;; instruction, must be set by prefilters, and contain a single bit
54 ;;; of data each (presence/absence). As such, each instruction that
55 ;;; can emit an operand-size prefix (x66 prefix) needs to have a set
56 ;;; of printers declared for both the prefixed and non-prefixed
59 ;;; Return the operand size based on the prefixes and width bit from
61 (defun inst-operand-size (dstate)
62 (declare (type sb!disassem:disassem-state dstate))
63 (cond ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-8)
65 ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
68 +default-operand-size+)))
70 ;;; Return the operand size for a "word-sized" operand based on the
71 ;;; prefixes from the dstate.
72 (defun inst-word-operand-size (dstate)
73 (declare (type sb!disassem:disassem-state dstate))
74 (if (sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
78 (defun print-reg-with-width (value width stream dstate)
79 (declare (ignore dstate))
80 (princ (aref (ecase width
81 (:byte *byte-reg-names*)
82 (:word *word-reg-names*)
83 (:dword *dword-reg-names*))
86 ;; XXX plus should do some source-var notes
89 (defun print-reg (value stream dstate)
90 (declare (type reg value)
92 (type sb!disassem:disassem-state dstate))
93 (print-reg-with-width value
94 (inst-operand-size dstate)
98 (defun print-word-reg (value stream dstate)
99 (declare (type reg value)
101 (type sb!disassem:disassem-state dstate))
102 (print-reg-with-width value
103 (inst-word-operand-size dstate)
107 (defun print-byte-reg (value stream dstate)
108 (declare (type reg value)
110 (type sb!disassem:disassem-state dstate))
111 (print-reg-with-width value :byte stream dstate))
113 (defun print-addr-reg (value stream dstate)
114 (declare (type reg value)
116 (type sb!disassem:disassem-state dstate))
117 (print-reg-with-width value *default-address-size* stream dstate))
119 (defun print-reg/mem (value stream dstate)
120 (declare (type (or list reg) value)
122 (type sb!disassem:disassem-state dstate))
123 (if (typep value 'reg)
124 (print-reg value stream dstate)
125 (print-mem-access value stream nil dstate)))
127 ;; Same as print-reg/mem, but prints an explicit size indicator for
128 ;; memory references.
129 (defun print-sized-reg/mem (value stream dstate)
130 (declare (type (or list reg) value)
132 (type sb!disassem:disassem-state dstate))
133 (if (typep value 'reg)
134 (print-reg value stream dstate)
135 (print-mem-access value stream t dstate)))
137 (defun print-byte-reg/mem (value stream dstate)
138 (declare (type (or list reg) value)
140 (type sb!disassem:disassem-state dstate))
141 (if (typep value 'reg)
142 (print-byte-reg value stream dstate)
143 (print-mem-access value stream t dstate)))
145 (defun print-word-reg/mem (value stream dstate)
146 (declare (type (or list reg) value)
148 (type sb!disassem:disassem-state dstate))
149 (if (typep value 'reg)
150 (print-word-reg value stream dstate)
151 (print-mem-access value stream nil dstate)))
153 (defun print-label (value stream dstate)
154 (declare (ignore dstate))
155 (sb!disassem:princ16 value stream))
157 ;;; Returns either an integer, meaning a register, or a list of
158 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
159 ;;; may be missing or nil to indicate that it's not used or has the
160 ;;; obvious default value (e.g., 1 for the index-scale).
161 (defun prefilter-reg/mem (value dstate)
162 (declare (type list value)
163 (type sb!disassem:disassem-state dstate))
164 (let ((mod (car value))
166 (declare (type (unsigned-byte 2) mod)
167 (type (unsigned-byte 3) r/m))
173 (let ((sib (sb!disassem:read-suffix 8 dstate)))
174 (declare (type (unsigned-byte 8) sib))
175 (let ((base-reg (ldb (byte 3 0) sib))
176 (index-reg (ldb (byte 3 3) sib))
177 (index-scale (ldb (byte 2 6) sib)))
178 (declare (type (unsigned-byte 3) base-reg index-reg)
179 (type (unsigned-byte 2) index-scale))
183 (if (= base-reg #b101)
184 (sb!disassem:read-signed-suffix 32 dstate)
187 (sb!disassem:read-signed-suffix 8 dstate))
189 (sb!disassem:read-signed-suffix 32 dstate)))))
190 (list (if (and (= mod #b00) (= base-reg #b101)) nil base-reg)
192 (if (= index-reg #b100) nil index-reg)
193 (ash 1 index-scale))))))
194 ((and (= mod #b00) (= r/m #b101))
195 (list nil (sb!disassem:read-signed-suffix 32 dstate)) )
199 (list r/m (sb!disassem:read-signed-suffix 8 dstate)))
201 (list r/m (sb!disassem:read-signed-suffix 32 dstate))))))
204 ;;; This is a sort of bogus prefilter that just stores the info globally for
205 ;;; other people to use; it probably never gets printed.
206 (defun prefilter-width (value dstate)
207 (declare (type bit value)
208 (type sb!disassem:disassem-state dstate))
210 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-8))
213 ;;; This prefilter is used solely for its side effect, namely to put
214 ;;; the property OPERAND-SIZE-16 into the DSTATE.
215 (defun prefilter-x66 (value dstate)
216 (declare (type (eql #x66) value)
218 (type sb!disassem:disassem-state dstate))
219 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-16))
221 (defun read-address (value dstate)
222 (declare (ignore value)) ; always nil anyway
223 (sb!disassem:read-suffix (width-bits *default-address-size*) dstate))
225 (defun width-bits (width)
235 ;;;; disassembler argument types
237 (sb!disassem:define-arg-type displacement
239 :use-label #'offset-next
240 :printer (lambda (value stream dstate)
241 (sb!disassem:maybe-note-assembler-routine value nil dstate)
242 (print-label value stream dstate)))
244 (sb!disassem:define-arg-type accum
245 :printer (lambda (value stream dstate)
246 (declare (ignore value)
248 (type sb!disassem:disassem-state dstate))
249 (print-reg 0 stream dstate)))
251 (sb!disassem:define-arg-type word-accum
252 :printer (lambda (value stream dstate)
253 (declare (ignore value)
255 (type sb!disassem:disassem-state dstate))
256 (print-word-reg 0 stream dstate)))
258 (sb!disassem:define-arg-type reg
259 :printer #'print-reg)
261 (sb!disassem:define-arg-type addr-reg
262 :printer #'print-addr-reg)
264 (sb!disassem:define-arg-type word-reg
265 :printer #'print-word-reg)
267 (sb!disassem:define-arg-type imm-addr
268 :prefilter #'read-address
269 :printer #'print-label)
271 (sb!disassem:define-arg-type imm-data
272 :prefilter (lambda (value dstate)
273 (declare (ignore value)) ; always nil anyway
274 (sb!disassem:read-suffix
275 (width-bits (inst-operand-size dstate))
278 (sb!disassem:define-arg-type signed-imm-data
279 :prefilter (lambda (value dstate)
280 (declare (ignore value)) ; always nil anyway
281 (let ((width (inst-operand-size dstate)))
282 (sb!disassem:read-signed-suffix (width-bits width) dstate))))
284 (sb!disassem:define-arg-type signed-imm-byte
285 :prefilter (lambda (value dstate)
286 (declare (ignore value)) ; always nil anyway
287 (sb!disassem:read-signed-suffix 8 dstate)))
289 (sb!disassem:define-arg-type signed-imm-dword
290 :prefilter (lambda (value dstate)
291 (declare (ignore value)) ; always nil anyway
292 (sb!disassem:read-signed-suffix 32 dstate)))
294 (sb!disassem:define-arg-type imm-word
295 :prefilter (lambda (value dstate)
296 (declare (ignore value)) ; always nil anyway
297 (let ((width (inst-word-operand-size dstate)))
298 (sb!disassem:read-suffix (width-bits width) dstate))))
300 (sb!disassem:define-arg-type signed-imm-word
301 :prefilter (lambda (value dstate)
302 (declare (ignore value)) ; always nil anyway
303 (let ((width (inst-word-operand-size dstate)))
304 (sb!disassem:read-signed-suffix (width-bits width) dstate))))
306 ;;; needed for the ret imm16 instruction
307 (sb!disassem:define-arg-type imm-word-16
308 :prefilter (lambda (value dstate)
309 (declare (ignore value)) ; always nil anyway
310 (sb!disassem:read-suffix 16 dstate)))
312 (sb!disassem:define-arg-type reg/mem
313 :prefilter #'prefilter-reg/mem
314 :printer #'print-reg/mem)
315 (sb!disassem:define-arg-type sized-reg/mem
316 ;; Same as reg/mem, but prints an explicit size indicator for
317 ;; memory references.
318 :prefilter #'prefilter-reg/mem
319 :printer #'print-sized-reg/mem)
320 (sb!disassem:define-arg-type byte-reg/mem
321 :prefilter #'prefilter-reg/mem
322 :printer #'print-byte-reg/mem)
323 (sb!disassem:define-arg-type word-reg/mem
324 :prefilter #'prefilter-reg/mem
325 :printer #'print-word-reg/mem)
328 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
329 (defun print-fp-reg (value stream dstate)
330 (declare (ignore dstate))
331 (format stream "FR~D" value))
332 (defun prefilter-fp-reg (value dstate)
334 (declare (ignore dstate))
337 (sb!disassem:define-arg-type fp-reg
338 :prefilter #'prefilter-fp-reg
339 :printer #'print-fp-reg)
341 (sb!disassem:define-arg-type width
342 :prefilter #'prefilter-width
343 :printer (lambda (value stream dstate)
344 (declare (ignore value))
345 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
348 ;;; Used to capture the effect of the #x66 operand size override prefix.
349 (sb!disassem:define-arg-type x66
350 :prefilter #'prefilter-x66)
352 (eval-when (:compile-toplevel :load-toplevel :execute)
353 (defparameter *conditions*
356 (:b . 2) (:nae . 2) (:c . 2)
357 (:nb . 3) (:ae . 3) (:nc . 3)
358 (:eq . 4) (:e . 4) (:z . 4)
365 (:np . 11) (:po . 11)
366 (:l . 12) (:nge . 12)
367 (:nl . 13) (:ge . 13)
368 (:le . 14) (:ng . 14)
369 (:nle . 15) (:g . 15)))
370 (defparameter *condition-name-vec*
371 (let ((vec (make-array 16 :initial-element nil)))
372 (dolist (cond *conditions*)
373 (when (null (aref vec (cdr cond)))
374 (setf (aref vec (cdr cond)) (car cond))))
378 ;;; Set assembler parameters. (In CMU CL, this was done with
379 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
380 (eval-when (:compile-toplevel :load-toplevel :execute)
381 (setf sb!assem:*assem-scheduler-p* nil))
383 (sb!disassem:define-arg-type condition-code
384 :printer *condition-name-vec*)
386 (defun conditional-opcode (condition)
387 (cdr (assoc condition *conditions* :test #'eq)))
389 ;;;; disassembler instruction formats
391 (eval-when (:compile-toplevel :execute)
392 (defun swap-if (direction field1 separator field2)
393 `(:if (,direction :constant 0)
394 (,field1 ,separator ,field2)
395 (,field2 ,separator ,field1))))
397 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
398 (op :field (byte 8 0))
403 ;;; Prefix instructions
405 (sb!disassem:define-instruction-format (x66 8)
406 (x66 :field (byte 8 0) :type 'x66 :value #x66))
408 (sb!disassem:define-instruction-format (simple 8)
409 (op :field (byte 7 1))
410 (width :field (byte 1 0) :type 'width)
415 (sb!disassem:define-instruction-format (two-bytes 16
416 :default-printer '(:name))
417 (op :fields (list (byte 8 0) (byte 8 8))))
419 ;;; Same as simple, but with direction bit
420 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
421 (op :field (byte 6 2))
422 (dir :field (byte 1 1)))
424 ;;; Same as simple, but with the immediate value occurring by default,
425 ;;; and with an appropiate printer.
426 (sb!disassem:define-instruction-format (accum-imm 8
428 :default-printer '(:name
429 :tab accum ", " imm))
430 (imm :type 'imm-data))
432 (sb!disassem:define-instruction-format (reg-no-width 8
433 :default-printer '(:name :tab reg))
434 (op :field (byte 5 3))
435 (reg :field (byte 3 0) :type 'word-reg)
437 (accum :type 'word-accum)
440 ;;; adds a width field to reg-no-width
441 (sb!disassem:define-instruction-format (reg 8
442 :default-printer '(:name :tab reg))
443 (op :field (byte 4 4))
444 (width :field (byte 1 3) :type 'width)
445 (reg :field (byte 3 0) :type 'reg)
451 ;;; Same as reg, but with direction bit
452 (sb!disassem:define-instruction-format (reg-dir 8 :include 'reg)
453 (op :field (byte 3 5))
454 (dir :field (byte 1 4)))
456 (sb!disassem:define-instruction-format (two-bytes 16
457 :default-printer '(:name))
458 (op :fields (list (byte 8 0) (byte 8 8))))
460 (sb!disassem:define-instruction-format (reg-reg/mem 16
462 `(:name :tab reg ", " reg/mem))
463 (op :field (byte 7 1))
464 (width :field (byte 1 0) :type 'width)
465 (reg/mem :fields (list (byte 2 14) (byte 3 8))
467 (reg :field (byte 3 11) :type 'reg)
471 ;;; same as reg-reg/mem, but with direction bit
472 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
473 :include 'reg-reg/mem
477 ,(swap-if 'dir 'reg/mem ", " 'reg)))
478 (op :field (byte 6 2))
479 (dir :field (byte 1 1)))
481 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
482 (sb!disassem:define-instruction-format (reg/mem 16
483 :default-printer '(:name :tab reg/mem))
484 (op :fields (list (byte 7 1) (byte 3 11)))
485 (width :field (byte 1 0) :type 'width)
486 (reg/mem :fields (list (byte 2 14) (byte 3 8))
487 :type 'sized-reg/mem)
491 ;;; Same as reg/mem, but with the immediate value occurring by default,
492 ;;; and with an appropiate printer.
493 (sb!disassem:define-instruction-format (reg/mem-imm 16
496 '(:name :tab reg/mem ", " imm))
497 (reg/mem :type 'sized-reg/mem)
498 (imm :type 'imm-data))
500 ;;; Same as reg/mem, but with using the accumulator in the default printer
501 (sb!disassem:define-instruction-format
503 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
504 (reg/mem :type 'reg/mem) ; don't need a size
505 (accum :type 'accum))
507 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
508 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
510 `(:name :tab reg ", " reg/mem))
511 (prefix :field (byte 8 0) :value #b00001111)
512 (op :field (byte 7 9))
513 (width :field (byte 1 8) :type 'width)
514 (reg/mem :fields (list (byte 2 22) (byte 3 16))
516 (reg :field (byte 3 19) :type 'reg)
520 ;;; reg-no-width with #x0f prefix
521 (sb!disassem:define-instruction-format (ext-reg-no-width 16
522 :default-printer '(:name :tab reg))
523 (prefix :field (byte 8 0) :value #b00001111)
524 (op :field (byte 5 11))
525 (reg :field (byte 3 8) :type 'reg))
527 ;;; Same as reg/mem, but with a prefix of #b00001111
528 (sb!disassem:define-instruction-format (ext-reg/mem 24
529 :default-printer '(:name :tab reg/mem))
530 (prefix :field (byte 8 0) :value #b00001111)
531 (op :fields (list (byte 7 9) (byte 3 19)))
532 (width :field (byte 1 8) :type 'width)
533 (reg/mem :fields (list (byte 2 22) (byte 3 16))
534 :type 'sized-reg/mem)
538 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
539 :include 'ext-reg/mem
541 '(:name :tab reg/mem ", " imm))
542 (imm :type 'imm-data))
544 ;;;; This section was added by jrd, for fp instructions.
546 ;;; regular fp inst to/from registers/memory
547 (sb!disassem:define-instruction-format (floating-point 16
549 `(:name :tab reg/mem))
550 (prefix :field (byte 5 3) :value #b11011)
551 (op :fields (list (byte 3 0) (byte 3 11)))
552 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
554 ;;; fp insn to/from fp reg
555 (sb!disassem:define-instruction-format (floating-point-fp 16
556 :default-printer `(:name :tab fp-reg))
557 (prefix :field (byte 5 3) :value #b11011)
558 (suffix :field (byte 2 14) :value #b11)
559 (op :fields (list (byte 3 0) (byte 3 11)))
560 (fp-reg :field (byte 3 8) :type 'fp-reg))
562 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
563 (sb!disassem:define-instruction-format
564 (floating-point-fp-d 16
565 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
566 (prefix :field (byte 5 3) :value #b11011)
567 (suffix :field (byte 2 14) :value #b11)
568 (op :fields (list (byte 2 0) (byte 3 11)))
569 (d :field (byte 1 2))
570 (fp-reg :field (byte 3 8) :type 'fp-reg))
573 ;;; (added by (?) pfw)
574 ;;; fp no operand isns
575 (sb!disassem:define-instruction-format (floating-point-no 16
576 :default-printer '(:name))
577 (prefix :field (byte 8 0) :value #b11011001)
578 (suffix :field (byte 3 13) :value #b111)
579 (op :field (byte 5 8)))
581 (sb!disassem:define-instruction-format (floating-point-3 16
582 :default-printer '(:name))
583 (prefix :field (byte 5 3) :value #b11011)
584 (suffix :field (byte 2 14) :value #b11)
585 (op :fields (list (byte 3 0) (byte 6 8))))
587 (sb!disassem:define-instruction-format (floating-point-5 16
588 :default-printer '(:name))
589 (prefix :field (byte 8 0) :value #b11011011)
590 (suffix :field (byte 3 13) :value #b111)
591 (op :field (byte 5 8)))
593 (sb!disassem:define-instruction-format (floating-point-st 16
594 :default-printer '(:name))
595 (prefix :field (byte 8 0) :value #b11011111)
596 (suffix :field (byte 3 13) :value #b111)
597 (op :field (byte 5 8)))
599 (sb!disassem:define-instruction-format (string-op 8
601 :default-printer '(:name width)))
603 (sb!disassem:define-instruction-format (short-cond-jump 16)
604 (op :field (byte 4 4))
605 (cc :field (byte 4 0) :type 'condition-code)
606 (label :field (byte 8 8) :type 'displacement))
608 (sb!disassem:define-instruction-format (short-jump 16
609 :default-printer '(:name :tab label))
610 (const :field (byte 4 4) :value #b1110)
611 (op :field (byte 4 0))
612 (label :field (byte 8 8) :type 'displacement))
614 (sb!disassem:define-instruction-format (near-cond-jump 16)
615 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
616 (cc :field (byte 4 8) :type 'condition-code)
617 ;; The disassembler currently doesn't let you have an instruction > 32 bits
618 ;; long, so we fake it by using a prefilter to read the offset.
619 (label :type 'displacement
620 :prefilter (lambda (value dstate)
621 (declare (ignore value)) ; always nil anyway
622 (sb!disassem:read-signed-suffix 32 dstate))))
624 (sb!disassem:define-instruction-format (near-jump 8
625 :default-printer '(:name :tab label))
626 (op :field (byte 8 0))
627 ;; The disassembler currently doesn't let you have an instruction > 32 bits
628 ;; long, so we fake it by using a prefilter to read the address.
629 (label :type 'displacement
630 :prefilter (lambda (value dstate)
631 (declare (ignore value)) ; always nil anyway
632 (sb!disassem:read-signed-suffix 32 dstate))))
635 (sb!disassem:define-instruction-format (cond-set 24
636 :default-printer '('set cc :tab reg/mem))
637 (prefix :field (byte 8 0) :value #b00001111)
638 (op :field (byte 4 12) :value #b1001)
639 (cc :field (byte 4 8) :type 'condition-code)
640 (reg/mem :fields (list (byte 2 22) (byte 3 16))
642 (reg :field (byte 3 19) :value #b000))
644 (sb!disassem:define-instruction-format (cond-move 24
646 '('cmov cc :tab reg ", " reg/mem))
647 (prefix :field (byte 8 0) :value #b00001111)
648 (op :field (byte 4 12) :value #b0100)
649 (cc :field (byte 4 8) :type 'condition-code)
650 (reg/mem :fields (list (byte 2 22) (byte 3 16))
652 (reg :field (byte 3 19) :type 'reg))
654 (sb!disassem:define-instruction-format (enter-format 32
655 :default-printer '(:name
657 (:unless (:constant 0)
659 (op :field (byte 8 0))
660 (disp :field (byte 16 8))
661 (level :field (byte 8 24)))
663 (sb!disassem:define-instruction-format (prefetch 24
665 '(:name ", " reg/mem))
666 (prefix :field (byte 8 0) :value #b00001111)
667 (op :field (byte 8 8) :value #b00011000)
668 (reg/mem :fields (list (byte 2 22) (byte 3 16)) :type 'byte-reg/mem)
669 (reg :field (byte 3 19) :type 'reg))
671 ;;; Single byte instruction with an immediate byte argument.
672 (sb!disassem:define-instruction-format (byte-imm 16
673 :default-printer '(:name :tab code))
674 (op :field (byte 8 0))
675 (code :field (byte 8 8)))
677 ;;; Two byte instruction with an immediate byte argument.
679 (sb!disassem:define-instruction-format (word-imm 24
680 :default-printer '(:name :tab code))
681 (op :field (byte 16 0))
682 (code :field (byte 8 16)))
685 ;;;; primitive emitters
687 (define-bitfield-emitter emit-word 16
690 (define-bitfield-emitter emit-dword 32
693 (define-bitfield-emitter emit-byte-with-reg 8
694 (byte 5 3) (byte 3 0))
696 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
697 (byte 2 6) (byte 3 3) (byte 3 0))
699 (define-bitfield-emitter emit-sib-byte 8
700 (byte 2 6) (byte 3 3) (byte 3 0))
704 (defun emit-absolute-fixup (segment fixup)
705 (note-fixup segment :absolute fixup)
706 (let ((offset (fixup-offset fixup)))
708 (emit-back-patch segment
709 4 ; FIXME: n-word-bytes
710 (lambda (segment posn)
711 (declare (ignore posn))
713 (- (+ (component-header-length)
714 (or (label-position offset)
716 other-pointer-lowtag))))
717 (emit-dword segment (or offset 0)))))
719 (defun emit-relative-fixup (segment fixup)
720 (note-fixup segment :relative fixup)
721 (emit-dword segment (or (fixup-offset fixup) 0)))
723 ;;;; the effective-address (ea) structure
725 (defun reg-tn-encoding (tn)
726 (declare (type tn tn))
727 (aver (eq (sb-name (sc-sb (tn-sc tn))) 'registers))
728 (let ((offset (tn-offset tn)))
729 (logior (ash (logand offset 1) 2)
732 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
734 (size nil :type (member :byte :word :dword))
735 (base nil :type (or tn null))
736 (index nil :type (or tn null))
737 (scale 1 :type (member 1 2 4 8))
738 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
739 (def!method print-object ((ea ea) stream)
740 (cond ((or *print-escape* *print-readably*)
741 (print-unreadable-object (ea stream :type t)
743 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
747 (let ((scale (ea-scale ea)))
748 (if (= scale 1) nil scale))
751 (format stream "~A PTR [" (symbol-name (ea-size ea)))
753 (write-string (sb!c::location-print-name (ea-base ea)) stream)
755 (write-string "+" stream)))
757 (write-string (sb!c::location-print-name (ea-index ea)) stream))
758 (unless (= (ea-scale ea) 1)
759 (format stream "*~A" (ea-scale ea)))
760 (typecase (ea-disp ea)
763 (format stream "~@D" (ea-disp ea)))
765 (format stream "+~A" (ea-disp ea))))
766 (write-char #\] stream))))
768 (defun emit-ea (segment thing reg &optional allow-constants)
771 (ecase (sb-name (sc-sb (tn-sc thing)))
773 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
775 ;; Convert stack tns into an index off of EBP.
776 (let ((disp (frame-byte-offset (tn-offset thing))))
777 (cond ((<= -128 disp 127)
778 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
779 (emit-byte segment disp))
781 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
782 (emit-dword segment disp)))))
784 (unless allow-constants
786 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
787 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
788 (emit-absolute-fixup segment
791 (- (* (tn-offset thing) n-word-bytes)
792 other-pointer-lowtag))))))
794 (let* ((base (ea-base thing))
795 (index (ea-index thing))
796 (scale (ea-scale thing))
797 (disp (ea-disp thing))
798 (mod (cond ((or (null base)
800 (not (= (reg-tn-encoding base) #b101))))
802 ((and (fixnump disp) (<= -128 disp 127))
806 (r/m (cond (index #b100)
808 (t (reg-tn-encoding base)))))
809 (when (and (fixup-p disp)
810 (label-p (fixup-offset disp)))
813 (return-from emit-ea (emit-ea segment disp reg allow-constants)))
814 (emit-mod-reg-r/m-byte segment mod reg r/m)
816 (let ((ss (1- (integer-length scale)))
817 (index (if (null index)
819 (let ((index (reg-tn-encoding index)))
821 (error "can't index off of ESP")
823 (base (if (null base)
825 (reg-tn-encoding base))))
826 (emit-sib-byte segment ss index base)))
828 (emit-byte segment disp))
829 ((or (= mod #b10) (null base))
831 (emit-absolute-fixup segment disp)
832 (emit-dword segment disp))))))
834 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
835 (emit-absolute-fixup segment thing))))
837 (defun fp-reg-tn-p (thing)
839 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
841 ;;; like the above, but for fp-instructions--jrd
842 (defun emit-fp-op (segment thing op)
843 (if (fp-reg-tn-p thing)
844 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
847 (emit-ea segment thing op)))
849 (defun byte-reg-p (thing)
851 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
852 (member (sc-name (tn-sc thing)) *byte-sc-names*)
855 (defun byte-ea-p (thing)
857 (ea (eq (ea-size thing) :byte))
859 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
862 (defun word-reg-p (thing)
864 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
865 (member (sc-name (tn-sc thing)) *word-sc-names*)
868 (defun word-ea-p (thing)
870 (ea (eq (ea-size thing) :word))
871 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
874 (defun dword-reg-p (thing)
876 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
877 (member (sc-name (tn-sc thing)) *dword-sc-names*)
880 (defun dword-ea-p (thing)
882 (ea (eq (ea-size thing) :dword))
884 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
887 (defun register-p (thing)
889 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
891 (defun accumulator-p (thing)
892 (and (register-p thing)
893 (= (tn-offset thing) 0)))
897 (def!constant +operand-size-prefix-byte+ #b01100110)
899 (defun maybe-emit-operand-size-prefix (segment size)
900 (unless (or (eq size :byte) (eq size +default-operand-size+))
901 (emit-byte segment +operand-size-prefix-byte+)))
903 (defun operand-size (thing)
906 ;; FIXME: might as well be COND instead of having to use #. readmacro
907 ;; to hack up the code
908 (case (sc-name (tn-sc thing))
915 ;; added by jrd: float-registers is a separate size (?)
921 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
927 (defun matching-operand-size (dst src)
928 (let ((dst-size (operand-size dst))
929 (src-size (operand-size src)))
932 (if (eq dst-size src-size)
934 (error "size mismatch: ~S is a ~S and ~S is a ~S."
935 dst dst-size src src-size))
939 (error "can't tell the size of either ~S or ~S" dst src)))))
941 (defun emit-sized-immediate (segment size value)
944 (emit-byte segment value))
946 (emit-word segment value))
948 (emit-dword segment value))))
952 (define-instruction x66 (segment)
953 (:printer x66 () nil :print-name nil)
955 (bug "#X66 prefix used as a standalone instruction")))
957 (defun emit-prefix (segment name)
962 (emit-byte segment #xf0))
964 (emit-byte segment #x64))
966 (emit-byte segment #x65))))
968 (define-instruction lock (segment)
969 (:printer byte ((op #b11110000)) nil)
971 (bug "LOCK prefix used as a standalone instruction")))
973 (define-instruction rep (segment)
975 (emit-byte segment #b11110011)))
977 (define-instruction repe (segment)
978 (:printer byte ((op #b11110011)) nil)
980 (emit-byte segment #b11110011)))
982 (define-instruction repne (segment)
983 (:printer byte ((op #b11110010)) nil)
985 (emit-byte segment #b11110010)))
987 ;;;; general data transfer
989 (define-instruction mov (segment dst src &optional prefix)
990 ;; immediate to register
991 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
992 '(:name :tab reg ", " imm))
993 ;; absolute mem to/from accumulator
994 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
995 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
996 ;; register to/from register/memory
997 (:printer reg-reg/mem-dir ((op #b100010)))
998 ;; immediate to register/memory
999 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1002 (emit-prefix segment prefix)
1003 (let ((size (matching-operand-size dst src)))
1004 (maybe-emit-operand-size-prefix segment size)
1005 (cond ((register-p dst)
1006 (cond ((integerp src)
1007 (emit-byte-with-reg segment
1011 (reg-tn-encoding dst))
1012 (emit-sized-immediate segment size src))
1013 ((and (fixup-p src) (accumulator-p dst))
1018 (emit-absolute-fixup segment src))
1024 (emit-ea segment src (reg-tn-encoding dst) t))))
1025 ((and (fixup-p dst) (accumulator-p src))
1026 (emit-byte segment (if (eq size :byte) #b10100010 #b10100011))
1027 (emit-absolute-fixup segment dst))
1029 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
1030 (emit-ea segment dst #b000)
1031 (emit-sized-immediate segment size src))
1033 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1034 (emit-ea segment dst (reg-tn-encoding src)))
1036 (aver (eq size :dword))
1037 (emit-byte segment #b11000111)
1038 (emit-ea segment dst #b000)
1039 (emit-absolute-fixup segment src))
1041 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1043 (defun emit-move-with-extension (segment dst src opcode)
1044 (aver (register-p dst))
1045 (let ((dst-size (operand-size dst))
1046 (src-size (operand-size src)))
1049 (aver (eq src-size :byte))
1050 (maybe-emit-operand-size-prefix segment :word)
1051 (emit-byte segment #b00001111)
1052 (emit-byte segment opcode)
1053 (emit-ea segment src (reg-tn-encoding dst)))
1057 (maybe-emit-operand-size-prefix segment :dword)
1058 (emit-byte segment #b00001111)
1059 (emit-byte segment opcode)
1060 (emit-ea segment src (reg-tn-encoding dst)))
1062 (emit-byte segment #b00001111)
1063 (emit-byte segment (logior opcode 1))
1064 (emit-ea segment src (reg-tn-encoding dst))))))))
1066 (define-instruction movsx (segment dst src)
1067 (:printer ext-reg-reg/mem ((op #b1011111)
1068 (reg nil :type 'word-reg)
1069 (reg/mem nil :type 'sized-reg/mem)))
1070 (:emitter (emit-move-with-extension segment dst src #b10111110)))
1072 (define-instruction movzx (segment dst src)
1073 (:printer ext-reg-reg/mem ((op #b1011011)
1074 (reg nil :type 'word-reg)
1075 (reg/mem nil :type 'sized-reg/mem)))
1076 (:emitter (emit-move-with-extension segment dst src #b10110110)))
1078 (define-instruction push (segment src &optional prefix)
1080 (:printer reg-no-width ((op #b01010)))
1082 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
1084 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1086 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
1088 ;; ### segment registers?
1091 (emit-prefix segment prefix)
1092 (cond ((integerp src)
1093 (cond ((<= -128 src 127)
1094 (emit-byte segment #b01101010)
1095 (emit-byte segment src))
1097 (emit-byte segment #b01101000)
1098 (emit-dword segment src))))
1100 ;; Interpret the fixup as an immediate dword to push.
1101 (emit-byte segment #b01101000)
1102 (emit-absolute-fixup segment src))
1104 (let ((size (operand-size src)))
1105 (aver (not (eq size :byte)))
1106 (maybe-emit-operand-size-prefix segment size)
1107 (cond ((register-p src)
1108 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1110 (emit-byte segment #b11111111)
1111 (emit-ea segment src #b110 t))))))))
1113 (define-instruction pusha (segment)
1114 (:printer byte ((op #b01100000)))
1116 (emit-byte segment #b01100000)))
1118 (define-instruction pop (segment dst)
1119 (:printer reg-no-width ((op #b01011)))
1120 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
1122 (let ((size (operand-size dst)))
1123 (aver (not (eq size :byte)))
1124 (maybe-emit-operand-size-prefix segment size)
1125 (cond ((register-p dst)
1126 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1128 (emit-byte segment #b10001111)
1129 (emit-ea segment dst #b000))))))
1131 (define-instruction popa (segment)
1132 (:printer byte ((op #b01100001)))
1134 (emit-byte segment #b01100001)))
1136 (define-instruction xchg (segment operand1 operand2)
1137 ;; Register with accumulator.
1138 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1139 ;; Register/Memory with Register.
1140 (:printer reg-reg/mem ((op #b1000011)))
1142 (let ((size (matching-operand-size operand1 operand2)))
1143 (maybe-emit-operand-size-prefix segment size)
1144 (labels ((xchg-acc-with-something (acc something)
1145 (if (and (not (eq size :byte)) (register-p something))
1146 (emit-byte-with-reg segment
1148 (reg-tn-encoding something))
1149 (xchg-reg-with-something acc something)))
1150 (xchg-reg-with-something (reg something)
1151 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1152 (emit-ea segment something (reg-tn-encoding reg))))
1153 (cond ((accumulator-p operand1)
1154 (xchg-acc-with-something operand1 operand2))
1155 ((accumulator-p operand2)
1156 (xchg-acc-with-something operand2 operand1))
1157 ((register-p operand1)
1158 (xchg-reg-with-something operand1 operand2))
1159 ((register-p operand2)
1160 (xchg-reg-with-something operand2 operand1))
1162 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1164 (define-instruction lea (segment dst src)
1165 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1167 (aver (dword-reg-p dst))
1168 (emit-byte segment #b10001101)
1169 (emit-ea segment src (reg-tn-encoding dst))))
1171 (define-instruction cmpxchg (segment dst src &optional prefix)
1172 ;; Register/Memory with Register.
1173 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1175 (aver (register-p src))
1176 (emit-prefix segment prefix)
1177 (let ((size (matching-operand-size src dst)))
1178 (maybe-emit-operand-size-prefix segment size)
1179 (emit-byte segment #b00001111)
1180 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1181 (emit-ea segment dst (reg-tn-encoding src)))))
1183 (define-instruction pause (segment)
1184 (:printer two-bytes ((op '(#xf3 #x90))))
1186 (emit-byte segment #xf3)
1187 (emit-byte segment #x90)))
1189 (define-instruction fs-segment-prefix (segment)
1190 (:printer byte ((op #b01100100)))
1192 (bug "FS emitted as a separate instruction!")))
1194 (define-instruction gs-segment-prefix (segment)
1195 (:printer byte ((op #b01100101)))
1197 (bug "GS emitted as a separate instruction!")))
1199 ;;;; flag control instructions
1201 ;;; CLC -- Clear Carry Flag.
1202 (define-instruction clc (segment)
1203 (:printer byte ((op #b11111000)))
1205 (emit-byte segment #b11111000)))
1207 ;;; CLD -- Clear Direction Flag.
1208 (define-instruction cld (segment)
1209 (:printer byte ((op #b11111100)))
1211 (emit-byte segment #b11111100)))
1213 ;;; CLI -- Clear Iterrupt Enable Flag.
1214 (define-instruction cli (segment)
1215 (:printer byte ((op #b11111010)))
1217 (emit-byte segment #b11111010)))
1219 ;;; CMC -- Complement Carry Flag.
1220 (define-instruction cmc (segment)
1221 (:printer byte ((op #b11110101)))
1223 (emit-byte segment #b11110101)))
1225 ;;; LAHF -- Load AH into flags.
1226 (define-instruction lahf (segment)
1227 (:printer byte ((op #b10011111)))
1229 (emit-byte segment #b10011111)))
1231 ;;; POPF -- Pop flags.
1232 (define-instruction popf (segment)
1233 (:printer byte ((op #b10011101)))
1235 (emit-byte segment #b10011101)))
1237 ;;; PUSHF -- push flags.
1238 (define-instruction pushf (segment)
1239 (:printer byte ((op #b10011100)))
1241 (emit-byte segment #b10011100)))
1243 ;;; SAHF -- Store AH into flags.
1244 (define-instruction sahf (segment)
1245 (:printer byte ((op #b10011110)))
1247 (emit-byte segment #b10011110)))
1249 ;;; STC -- Set Carry Flag.
1250 (define-instruction stc (segment)
1251 (:printer byte ((op #b11111001)))
1253 (emit-byte segment #b11111001)))
1255 ;;; STD -- Set Direction Flag.
1256 (define-instruction std (segment)
1257 (:printer byte ((op #b11111101)))
1259 (emit-byte segment #b11111101)))
1261 ;;; STI -- Set Interrupt Enable Flag.
1262 (define-instruction sti (segment)
1263 (:printer byte ((op #b11111011)))
1265 (emit-byte segment #b11111011)))
1269 (defun emit-random-arith-inst (name segment dst src opcode
1270 &optional allow-constants)
1271 (let ((size (matching-operand-size dst src)))
1272 (maybe-emit-operand-size-prefix segment size)
1275 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1276 (emit-byte segment #b10000011)
1277 (emit-ea segment dst opcode allow-constants)
1278 (emit-byte segment src))
1279 ((accumulator-p dst)
1286 (emit-sized-immediate segment size src))
1288 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1289 (emit-ea segment dst opcode allow-constants)
1290 (emit-sized-immediate segment size src))))
1295 (if (eq size :byte) #b00000000 #b00000001)))
1296 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1301 (if (eq size :byte) #b00000010 #b00000011)))
1302 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1304 (error "bogus operands to ~A" name)))))
1306 (eval-when (:compile-toplevel :execute)
1307 (defun arith-inst-printer-list (subop)
1308 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1309 (reg/mem-imm ((op (#b1000000 ,subop))))
1310 (reg/mem-imm ((op (#b1000001 ,subop))
1311 (imm nil :type signed-imm-byte)))
1312 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000)))))))
1314 (define-instruction add (segment dst src &optional prefix)
1315 (:printer-list (arith-inst-printer-list #b000))
1317 (emit-prefix segment prefix)
1318 (emit-random-arith-inst "ADD" segment dst src #b000)))
1320 (define-instruction adc (segment dst src)
1321 (:printer-list (arith-inst-printer-list #b010))
1322 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1324 (define-instruction sub (segment dst src &optional prefix)
1325 (:printer-list (arith-inst-printer-list #b101))
1327 (emit-prefix segment prefix)
1328 (emit-random-arith-inst "SUB" segment dst src #b101)))
1330 (define-instruction sbb (segment dst src)
1331 (:printer-list (arith-inst-printer-list #b011))
1332 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1334 (define-instruction cmp (segment dst src &optional prefix)
1335 (:printer-list (arith-inst-printer-list #b111))
1337 (emit-prefix segment prefix)
1338 (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1340 (define-instruction inc (segment dst)
1342 (:printer reg-no-width ((op #b01000)))
1344 (:printer reg/mem ((op '(#b1111111 #b000))))
1346 (let ((size (operand-size dst)))
1347 (maybe-emit-operand-size-prefix segment size)
1348 (cond ((and (not (eq size :byte)) (register-p dst))
1349 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1351 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1352 (emit-ea segment dst #b000))))))
1354 (define-instruction dec (segment dst)
1356 (:printer reg-no-width ((op #b01001)))
1358 (:printer reg/mem ((op '(#b1111111 #b001))))
1360 (let ((size (operand-size dst)))
1361 (maybe-emit-operand-size-prefix segment size)
1362 (cond ((and (not (eq size :byte)) (register-p dst))
1363 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1365 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1366 (emit-ea segment dst #b001))))))
1368 (define-instruction neg (segment dst)
1369 (:printer reg/mem ((op '(#b1111011 #b011))))
1371 (let ((size (operand-size dst)))
1372 (maybe-emit-operand-size-prefix segment size)
1373 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1374 (emit-ea segment dst #b011))))
1376 (define-instruction aaa (segment)
1377 (:printer byte ((op #b00110111)))
1379 (emit-byte segment #b00110111)))
1381 (define-instruction aas (segment)
1382 (:printer byte ((op #b00111111)))
1384 (emit-byte segment #b00111111)))
1386 (define-instruction daa (segment)
1387 (:printer byte ((op #b00100111)))
1389 (emit-byte segment #b00100111)))
1391 (define-instruction das (segment)
1392 (:printer byte ((op #b00101111)))
1394 (emit-byte segment #b00101111)))
1396 (define-instruction mul (segment dst src)
1397 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1399 (let ((size (matching-operand-size dst src)))
1400 (aver (accumulator-p dst))
1401 (maybe-emit-operand-size-prefix segment size)
1402 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1403 (emit-ea segment src #b100))))
1405 (define-instruction imul (segment dst &optional src1 src2)
1406 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1407 (:printer ext-reg-reg/mem ((op #b1010111)))
1408 (:printer reg-reg/mem ((op #b0110100) (width 1)
1409 (imm nil :type 'signed-imm-word))
1410 '(:name :tab reg ", " reg/mem ", " imm))
1411 (:printer reg-reg/mem ((op #b0110101) (width 1)
1412 (imm nil :type 'signed-imm-byte))
1413 '(:name :tab reg ", " reg/mem ", " imm))
1415 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1416 (let* ((size (matching-operand-size reg r/m))
1417 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1418 (maybe-emit-operand-size-prefix segment size)
1419 (emit-byte segment (if sx #b01101011 #b01101001))
1420 (emit-ea segment r/m (reg-tn-encoding reg))
1422 (emit-byte segment immed)
1423 (emit-sized-immediate segment size immed)))))
1425 (r/m-with-immed-to-reg dst src1 src2))
1428 (r/m-with-immed-to-reg dst dst src1)
1429 (let ((size (matching-operand-size dst src1)))
1430 (maybe-emit-operand-size-prefix segment size)
1431 (emit-byte segment #b00001111)
1432 (emit-byte segment #b10101111)
1433 (emit-ea segment src1 (reg-tn-encoding dst)))))
1435 (let ((size (operand-size dst)))
1436 (maybe-emit-operand-size-prefix segment size)
1437 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1438 (emit-ea segment dst #b101)))))))
1440 (define-instruction div (segment dst src)
1441 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1443 (let ((size (matching-operand-size dst src)))
1444 (aver (accumulator-p dst))
1445 (maybe-emit-operand-size-prefix segment size)
1446 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1447 (emit-ea segment src #b110))))
1449 (define-instruction idiv (segment dst src)
1450 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1452 (let ((size (matching-operand-size dst src)))
1453 (aver (accumulator-p dst))
1454 (maybe-emit-operand-size-prefix segment size)
1455 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1456 (emit-ea segment src #b111))))
1458 (define-instruction aad (segment)
1459 (:printer two-bytes ((op '(#b11010101 #b00001010))))
1461 (emit-byte segment #b11010101)
1462 (emit-byte segment #b00001010)))
1464 (define-instruction aam (segment)
1465 (:printer two-bytes ((op '(#b11010100 #b00001010))))
1467 (emit-byte segment #b11010100)
1468 (emit-byte segment #b00001010)))
1470 (define-instruction bswap (segment dst)
1471 (:printer ext-reg-no-width ((op #b11001)))
1473 (emit-byte segment #x0f)
1474 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst))))
1476 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1477 (define-instruction cbw (segment)
1478 (:printer two-bytes ((op '(#b01100110 #b10011000))))
1480 (maybe-emit-operand-size-prefix segment :word)
1481 (emit-byte segment #b10011000)))
1483 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1484 (define-instruction cwde (segment)
1485 (:printer byte ((op #b10011000)))
1487 (maybe-emit-operand-size-prefix segment :dword)
1488 (emit-byte segment #b10011000)))
1490 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1491 (define-instruction cwd (segment)
1492 (:printer two-bytes ((op '(#b01100110 #b10011001))))
1494 (maybe-emit-operand-size-prefix segment :word)
1495 (emit-byte segment #b10011001)))
1497 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1498 (define-instruction cdq (segment)
1499 (:printer byte ((op #b10011001)))
1501 (maybe-emit-operand-size-prefix segment :dword)
1502 (emit-byte segment #b10011001)))
1504 (define-instruction xadd (segment dst src &optional prefix)
1505 ;; Register/Memory with Register.
1506 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1508 (aver (register-p src))
1509 (emit-prefix segment prefix)
1510 (let ((size (matching-operand-size src dst)))
1511 (maybe-emit-operand-size-prefix segment size)
1512 (emit-byte segment #b00001111)
1513 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1514 (emit-ea segment dst (reg-tn-encoding src)))))
1519 (defun emit-shift-inst (segment dst amount opcode)
1520 (let ((size (operand-size dst)))
1521 (maybe-emit-operand-size-prefix segment size)
1522 (multiple-value-bind (major-opcode immed)
1524 (:cl (values #b11010010 nil))
1525 (1 (values #b11010000 nil))
1526 (t (values #b11000000 t)))
1528 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1529 (emit-ea segment dst opcode)
1531 (emit-byte segment amount)))))
1533 (eval-when (:compile-toplevel :execute)
1534 (defun shift-inst-printer-list (subop)
1535 `((reg/mem ((op (#b1101000 ,subop)))
1536 (:name :tab reg/mem ", 1"))
1537 (reg/mem ((op (#b1101001 ,subop)))
1538 (:name :tab reg/mem ", " 'cl))
1539 (reg/mem-imm ((op (#b1100000 ,subop))
1540 (imm nil :type signed-imm-byte))))))
1542 (define-instruction rol (segment dst amount)
1544 (shift-inst-printer-list #b000))
1546 (emit-shift-inst segment dst amount #b000)))
1548 (define-instruction ror (segment dst amount)
1550 (shift-inst-printer-list #b001))
1552 (emit-shift-inst segment dst amount #b001)))
1554 (define-instruction rcl (segment dst amount)
1556 (shift-inst-printer-list #b010))
1558 (emit-shift-inst segment dst amount #b010)))
1560 (define-instruction rcr (segment dst amount)
1562 (shift-inst-printer-list #b011))
1564 (emit-shift-inst segment dst amount #b011)))
1566 (define-instruction shl (segment dst amount)
1568 (shift-inst-printer-list #b100))
1570 (emit-shift-inst segment dst amount #b100)))
1572 (define-instruction shr (segment dst amount)
1574 (shift-inst-printer-list #b101))
1576 (emit-shift-inst segment dst amount #b101)))
1578 (define-instruction sar (segment dst amount)
1580 (shift-inst-printer-list #b111))
1582 (emit-shift-inst segment dst amount #b111)))
1584 (defun emit-double-shift (segment opcode dst src amt)
1585 (let ((size (matching-operand-size dst src)))
1586 (when (eq size :byte)
1587 (error "Double shifts can only be used with words."))
1588 (maybe-emit-operand-size-prefix segment size)
1589 (emit-byte segment #b00001111)
1590 (emit-byte segment (dpb opcode (byte 1 3)
1591 (if (eq amt :cl) #b10100101 #b10100100)))
1593 (emit-ea segment dst src)
1594 (emit-ea segment dst (reg-tn-encoding src)) ; pw tries this
1595 (unless (eq amt :cl)
1596 (emit-byte segment amt))))
1598 (eval-when (:compile-toplevel :execute)
1599 (defun double-shift-inst-printer-list (op)
1600 `((ext-reg-reg/mem ((op ,(logior op #b10)) (width 0)
1601 (imm nil :type signed-imm-byte)))
1602 (ext-reg-reg/mem ((op ,(logior op #b10)) (width 1))
1603 (:name :tab reg/mem ", " reg ", " 'cl)))))
1605 (define-instruction shld (segment dst src amt)
1606 (:declare (type (or (member :cl) (mod 32)) amt))
1607 (:printer-list (double-shift-inst-printer-list #b1010000))
1609 (emit-double-shift segment #b0 dst src amt)))
1611 (define-instruction shrd (segment dst src amt)
1612 (:declare (type (or (member :cl) (mod 32)) amt))
1613 (:printer-list (double-shift-inst-printer-list #b1010100))
1615 (emit-double-shift segment #b1 dst src amt)))
1617 (define-instruction and (segment dst src)
1619 (arith-inst-printer-list #b100))
1621 (emit-random-arith-inst "AND" segment dst src #b100)))
1623 (define-instruction test (segment this that)
1624 (:printer accum-imm ((op #b1010100)))
1625 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1626 (:printer reg-reg/mem ((op #b1000010)))
1628 (let ((size (matching-operand-size this that)))
1629 (maybe-emit-operand-size-prefix segment size)
1630 (flet ((test-immed-and-something (immed something)
1631 (cond ((accumulator-p something)
1633 (if (eq size :byte) #b10101000 #b10101001))
1634 (emit-sized-immediate segment size immed))
1637 (if (eq size :byte) #b11110110 #b11110111))
1638 (emit-ea segment something #b000)
1639 (emit-sized-immediate segment size immed))))
1640 (test-reg-and-something (reg something)
1641 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1642 (emit-ea segment something (reg-tn-encoding reg))))
1643 (cond ((integerp that)
1644 (test-immed-and-something that this))
1646 (test-immed-and-something this that))
1648 (test-reg-and-something this that))
1650 (test-reg-and-something that this))
1652 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1654 ;;; Emit the most compact form of the test immediate instruction,
1655 ;;; using an 8 bit test when the immediate is only 8 bits and the
1656 ;;; value is one of the four low registers (eax, ebx, ecx, edx) or the
1658 (defun emit-optimized-test-inst (x y)
1661 (let ((offset (tn-offset x)))
1662 (cond ((and (sc-is x any-reg descriptor-reg)
1663 (or (= offset eax-offset) (= offset ebx-offset)
1664 (= offset ecx-offset) (= offset edx-offset)))
1665 (inst test (make-random-tn :kind :normal
1666 :sc (sc-or-lose 'byte-reg)
1669 ((sc-is x control-stack)
1670 (inst test (make-ea :byte :base ebp-tn
1671 :disp (frame-byte-offset offset))
1678 (define-instruction or (segment dst src &optional prefix)
1680 (arith-inst-printer-list #b001))
1682 (emit-prefix segment prefix)
1683 (emit-random-arith-inst "OR" segment dst src #b001)))
1685 (define-instruction xor (segment dst src &optional prefix)
1687 (arith-inst-printer-list #b110))
1689 (emit-prefix segment prefix)
1690 (emit-random-arith-inst "XOR" segment dst src #b110)))
1692 (define-instruction not (segment dst)
1693 (:printer reg/mem ((op '(#b1111011 #b010))))
1695 (let ((size (operand-size dst)))
1696 (maybe-emit-operand-size-prefix segment size)
1697 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1698 (emit-ea segment dst #b010))))
1700 ;;;; string manipulation
1702 (define-instruction cmps (segment size)
1703 (:printer string-op ((op #b1010011)))
1705 (maybe-emit-operand-size-prefix segment size)
1706 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1708 (define-instruction ins (segment acc)
1709 (:printer string-op ((op #b0110110)))
1711 (let ((size (operand-size acc)))
1712 (aver (accumulator-p acc))
1713 (maybe-emit-operand-size-prefix segment size)
1714 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1716 (define-instruction lods (segment acc)
1717 (:printer string-op ((op #b1010110)))
1719 (let ((size (operand-size acc)))
1720 (aver (accumulator-p acc))
1721 (maybe-emit-operand-size-prefix segment size)
1722 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1724 (define-instruction movs (segment size)
1725 (:printer string-op ((op #b1010010)))
1727 (maybe-emit-operand-size-prefix segment size)
1728 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1730 (define-instruction outs (segment acc)
1731 (:printer string-op ((op #b0110111)))
1733 (let ((size (operand-size acc)))
1734 (aver (accumulator-p acc))
1735 (maybe-emit-operand-size-prefix segment size)
1736 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1738 (define-instruction scas (segment acc)
1739 (:printer string-op ((op #b1010111)))
1741 (let ((size (operand-size acc)))
1742 (aver (accumulator-p acc))
1743 (maybe-emit-operand-size-prefix segment size)
1744 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1746 (define-instruction stos (segment acc)
1747 (:printer string-op ((op #b1010101)))
1749 (let ((size (operand-size acc)))
1750 (aver (accumulator-p acc))
1751 (maybe-emit-operand-size-prefix segment size)
1752 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1754 (define-instruction xlat (segment)
1755 (:printer byte ((op #b11010111)))
1757 (emit-byte segment #b11010111)))
1760 ;;;; bit manipulation
1762 (define-instruction bsf (segment dst src)
1763 (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
1765 (let ((size (matching-operand-size dst src)))
1766 (when (eq size :byte)
1767 (error "can't scan bytes: ~S" src))
1768 (maybe-emit-operand-size-prefix segment size)
1769 (emit-byte segment #b00001111)
1770 (emit-byte segment #b10111100)
1771 (emit-ea segment src (reg-tn-encoding dst)))))
1773 (define-instruction bsr (segment dst src)
1774 (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
1776 (let ((size (matching-operand-size dst src)))
1777 (when (eq size :byte)
1778 (error "can't scan bytes: ~S" src))
1779 (maybe-emit-operand-size-prefix segment size)
1780 (emit-byte segment #b00001111)
1781 (emit-byte segment #b10111101)
1782 (emit-ea segment src (reg-tn-encoding dst)))))
1784 (defun emit-bit-test-and-mumble (segment src index opcode)
1785 (let ((size (operand-size src)))
1786 (when (eq size :byte)
1787 (error "can't scan bytes: ~S" src))
1788 (maybe-emit-operand-size-prefix segment size)
1789 (emit-byte segment #b00001111)
1790 (cond ((integerp index)
1791 (emit-byte segment #b10111010)
1792 (emit-ea segment src opcode)
1793 (emit-byte segment index))
1795 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
1796 (emit-ea segment src (reg-tn-encoding index))))))
1798 (eval-when (:compile-toplevel :execute)
1799 (defun bit-test-inst-printer-list (subop)
1800 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
1801 (reg/mem nil :type word-reg/mem)
1802 (imm nil :type imm-data)
1804 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
1806 (:name :tab reg/mem ", " reg)))))
1808 (define-instruction bt (segment src index)
1809 (:printer-list (bit-test-inst-printer-list #b100))
1811 (emit-bit-test-and-mumble segment src index #b100)))
1813 (define-instruction btc (segment src index)
1814 (:printer-list (bit-test-inst-printer-list #b111))
1816 (emit-bit-test-and-mumble segment src index #b111)))
1818 (define-instruction btr (segment src index)
1819 (:printer-list (bit-test-inst-printer-list #b110))
1821 (emit-bit-test-and-mumble segment src index #b110)))
1823 (define-instruction bts (segment src index)
1824 (:printer-list (bit-test-inst-printer-list #b101))
1826 (emit-bit-test-and-mumble segment src index #b101)))
1829 ;;;; control transfer
1831 (define-instruction call (segment where)
1832 (:printer near-jump ((op #b11101000)))
1833 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
1837 (emit-byte segment #b11101000)
1838 (emit-back-patch segment
1840 (lambda (segment posn)
1842 (- (label-position where)
1845 (emit-byte segment #b11101000)
1846 (emit-relative-fixup segment where))
1848 (emit-byte segment #b11111111)
1849 (emit-ea segment where #b010)))))
1851 (defun emit-byte-displacement-backpatch (segment target)
1852 (emit-back-patch segment
1854 (lambda (segment posn)
1855 (let ((disp (- (label-position target) (1+ posn))))
1856 (aver (<= -128 disp 127))
1857 (emit-byte segment disp)))))
1859 (define-instruction jmp (segment cond &optional where)
1860 ;; conditional jumps
1861 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
1862 (:printer near-cond-jump () '('j cc :tab label))
1863 ;; unconditional jumps
1864 (:printer short-jump ((op #b1011)))
1865 (:printer near-jump ((op #b11101001)) )
1866 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
1871 (lambda (segment posn delta-if-after)
1872 (let ((disp (- (label-position where posn delta-if-after)
1874 (when (<= -128 disp 127)
1876 (dpb (conditional-opcode cond)
1879 (emit-byte-displacement-backpatch segment where)
1881 (lambda (segment posn)
1882 (let ((disp (- (label-position where) (+ posn 6))))
1883 (emit-byte segment #b00001111)
1885 (dpb (conditional-opcode cond)
1888 (emit-dword segment disp)))))
1889 ((label-p (setq where cond))
1892 (lambda (segment posn delta-if-after)
1893 (let ((disp (- (label-position where posn delta-if-after)
1895 (when (<= -128 disp 127)
1896 (emit-byte segment #b11101011)
1897 (emit-byte-displacement-backpatch segment where)
1899 (lambda (segment posn)
1900 (let ((disp (- (label-position where) (+ posn 5))))
1901 (emit-byte segment #b11101001)
1902 (emit-dword segment disp)))))
1904 (emit-byte segment #b11101001)
1905 (emit-relative-fixup segment where))
1907 (unless (or (ea-p where) (tn-p where))
1908 (error "don't know what to do with ~A" where))
1909 (emit-byte segment #b11111111)
1910 (emit-ea segment where #b100)))))
1912 (define-instruction jmp-short (segment label)
1914 (emit-byte segment #b11101011)
1915 (emit-byte-displacement-backpatch segment label)))
1917 (define-instruction ret (segment &optional stack-delta)
1918 (:printer byte ((op #b11000011)))
1919 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
1922 (cond ((and stack-delta (not (zerop stack-delta)))
1923 (emit-byte segment #b11000010)
1924 (emit-word segment stack-delta))
1926 (emit-byte segment #b11000011)))))
1928 (define-instruction jecxz (segment target)
1929 (:printer short-jump ((op #b0011)))
1931 (emit-byte segment #b11100011)
1932 (emit-byte-displacement-backpatch segment target)))
1934 (define-instruction loop (segment target)
1935 (:printer short-jump ((op #b0010)))
1937 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
1938 (emit-byte-displacement-backpatch segment target)))
1940 (define-instruction loopz (segment target)
1941 (:printer short-jump ((op #b0001)))
1943 (emit-byte segment #b11100001)
1944 (emit-byte-displacement-backpatch segment target)))
1946 (define-instruction loopnz (segment target)
1947 (:printer short-jump ((op #b0000)))
1949 (emit-byte segment #b11100000)
1950 (emit-byte-displacement-backpatch segment target)))
1952 ;;;; conditional move
1953 (define-instruction cmov (segment cond dst src)
1954 (:printer cond-move ())
1956 (aver (register-p dst))
1957 (let ((size (matching-operand-size dst src)))
1958 (aver (or (eq size :word) (eq size :dword)))
1959 (maybe-emit-operand-size-prefix segment size))
1960 (emit-byte segment #b00001111)
1961 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
1962 (emit-ea segment src (reg-tn-encoding dst))))
1964 ;;;; conditional byte set
1966 (define-instruction set (segment dst cond)
1967 (:printer cond-set ())
1969 (emit-byte segment #b00001111)
1970 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
1971 (emit-ea segment dst #b000)))
1975 (define-instruction enter (segment disp &optional (level 0))
1976 (:declare (type (unsigned-byte 16) disp)
1977 (type (unsigned-byte 8) level))
1978 (:printer enter-format ((op #b11001000)))
1980 (emit-byte segment #b11001000)
1981 (emit-word segment disp)
1982 (emit-byte segment level)))
1984 (define-instruction leave (segment)
1985 (:printer byte ((op #b11001001)))
1987 (emit-byte segment #b11001001)))
1990 (define-instruction prefetchnta (segment ea)
1991 (:printer prefetch ((op #b00011000) (reg #b000)))
1993 (aver (typep ea 'ea))
1994 (aver (eq :byte (ea-size ea)))
1995 (emit-byte segment #b00001111)
1996 (emit-byte segment #b00011000)
1997 (emit-ea segment ea #b000)))
1999 (define-instruction prefetcht0 (segment ea)
2000 (:printer prefetch ((op #b00011000) (reg #b001)))
2002 (aver (typep ea 'ea))
2003 (aver (eq :byte (ea-size ea)))
2004 (emit-byte segment #b00001111)
2005 (emit-byte segment #b00011000)
2006 (emit-ea segment ea #b001)))
2008 (define-instruction prefetcht1 (segment ea)
2009 (:printer prefetch ((op #b00011000) (reg #b010)))
2011 (aver (typep ea 'ea))
2012 (aver (eq :byte (ea-size ea)))
2013 (emit-byte segment #b00001111)
2014 (emit-byte segment #b00011000)
2015 (emit-ea segment ea #b010)))
2017 (define-instruction prefetcht2 (segment ea)
2018 (:printer prefetch ((op #b00011000) (reg #b011)))
2020 (aver (typep ea 'ea))
2021 (aver (eq :byte (ea-size ea)))
2022 (emit-byte segment #b00001111)
2023 (emit-byte segment #b00011000)
2024 (emit-ea segment ea #b011)))
2026 ;;;; interrupt instructions
2028 (defun snarf-error-junk (sap offset &optional length-only)
2029 (let* ((length (sb!sys:sap-ref-8 sap offset))
2030 (vector (make-array length :element-type '(unsigned-byte 8))))
2031 (declare (type sb!sys:system-area-pointer sap)
2032 (type (unsigned-byte 8) length)
2033 (type (simple-array (unsigned-byte 8) (*)) vector))
2035 (values 0 (1+ length) nil nil))
2037 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2039 (collect ((sc-offsets)
2041 (lengths 1) ; the length byte
2043 (error-number (sb!c:read-var-integer vector index)))
2046 (when (>= index length)
2048 (let ((old-index index))
2049 (sc-offsets (sb!c:read-var-integer vector index))
2050 (lengths (- index old-index))))
2051 (values error-number
2057 (defmacro break-cases (breaknum &body cases)
2058 (let ((bn-temp (gensym)))
2059 (collect ((clauses))
2060 (dolist (case cases)
2061 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2062 `(let ((,bn-temp ,breaknum))
2063 (cond ,@(clauses))))))
2066 (defun break-control (chunk inst stream dstate)
2067 (declare (ignore inst))
2068 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2069 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2070 ;; map has it undefined; and it should be easier to look in the target
2071 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2072 ;; from first principles whether it's defined in some way that genesis
2074 (case #!-ud2-breakpoints (byte-imm-code chunk dstate)
2075 #!+ud2-breakpoints (word-imm-code chunk dstate)
2078 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2081 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2083 (nt "breakpoint trap"))
2084 (#.pending-interrupt-trap
2085 (nt "pending interrupt trap"))
2088 (#.fun-end-breakpoint-trap
2089 (nt "function end breakpoint trap")))))
2091 (define-instruction break (segment code)
2092 (:declare (type (unsigned-byte 8) code))
2093 #!-ud2-breakpoints (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2094 :control #'break-control)
2095 #!+ud2-breakpoints (:printer word-imm ((op #b0000101100001111)) '(:name :tab code)
2096 :control #'break-control)
2098 #!-ud2-breakpoints (emit-byte segment #b11001100)
2099 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2100 ;; throw a sigill with 0x0b0f instead and check for this in the
2101 ;; SIGILL handler and pass it on to the sigtrap handler if
2103 #!+ud2-breakpoints (emit-word segment #b0000101100001111)
2104 (emit-byte segment code)))
2106 (define-instruction int (segment number)
2107 (:declare (type (unsigned-byte 8) number))
2108 (:printer byte-imm ((op #b11001101)))
2112 (emit-byte segment #b11001100))
2114 (emit-byte segment #b11001101)
2115 (emit-byte segment number)))))
2117 (define-instruction into (segment)
2118 (:printer byte ((op #b11001110)))
2120 (emit-byte segment #b11001110)))
2122 (define-instruction bound (segment reg bounds)
2124 (let ((size (matching-operand-size reg bounds)))
2125 (when (eq size :byte)
2126 (error "can't bounds-test bytes: ~S" reg))
2127 (maybe-emit-operand-size-prefix segment size)
2128 (emit-byte segment #b01100010)
2129 (emit-ea segment bounds (reg-tn-encoding reg)))))
2131 (define-instruction iret (segment)
2132 (:printer byte ((op #b11001111)))
2134 (emit-byte segment #b11001111)))
2136 ;;;; processor control
2138 (define-instruction hlt (segment)
2139 (:printer byte ((op #b11110100)))
2141 (emit-byte segment #b11110100)))
2143 (define-instruction nop (segment)
2144 (:printer byte ((op #b10010000)))
2146 (emit-byte segment #b10010000)))
2148 (define-instruction wait (segment)
2149 (:printer byte ((op #b10011011)))
2151 (emit-byte segment #b10011011)))
2153 ;;;; miscellaneous hackery
2155 (define-instruction byte (segment byte)
2157 (emit-byte segment byte)))
2159 (define-instruction word (segment word)
2161 (emit-word segment word)))
2163 (define-instruction dword (segment dword)
2165 (emit-dword segment dword)))
2167 (defun emit-header-data (segment type)
2168 (emit-back-patch segment
2170 (lambda (segment posn)
2174 (component-header-length))
2178 (define-instruction simple-fun-header-word (segment)
2180 (emit-header-data segment simple-fun-header-widetag)))
2182 (define-instruction lra-header-word (segment)
2184 (emit-header-data segment return-pc-header-widetag)))
2186 ;;;; fp instructions
2188 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
2190 ;;;; Note: We treat the single-precision and double-precision variants
2191 ;;;; as separate instructions.
2193 ;;; Load single to st(0).
2194 (define-instruction fld (segment source)
2195 (:printer floating-point ((op '(#b001 #b000))))
2197 (emit-byte segment #b11011001)
2198 (emit-fp-op segment source #b000)))
2200 ;;; Load double to st(0).
2201 (define-instruction fldd (segment source)
2202 (:printer floating-point ((op '(#b101 #b000))))
2203 (:printer floating-point-fp ((op '(#b001 #b000))))
2205 (if (fp-reg-tn-p source)
2206 (emit-byte segment #b11011001)
2207 (emit-byte segment #b11011101))
2208 (emit-fp-op segment source #b000)))
2210 ;;; Load long to st(0).
2211 (define-instruction fldl (segment source)
2212 (:printer floating-point ((op '(#b011 #b101))))
2214 (emit-byte segment #b11011011)
2215 (emit-fp-op segment source #b101)))
2217 ;;; Store single from st(0).
2218 (define-instruction fst (segment dest)
2219 (:printer floating-point ((op '(#b001 #b010))))
2221 (cond ((fp-reg-tn-p dest)
2222 (emit-byte segment #b11011101)
2223 (emit-fp-op segment dest #b010))
2225 (emit-byte segment #b11011001)
2226 (emit-fp-op segment dest #b010)))))
2228 ;;; Store double from st(0).
2229 (define-instruction fstd (segment dest)
2230 (:printer floating-point ((op '(#b101 #b010))))
2231 (:printer floating-point-fp ((op '(#b101 #b010))))
2233 (cond ((fp-reg-tn-p dest)
2234 (emit-byte segment #b11011101)
2235 (emit-fp-op segment dest #b010))
2237 (emit-byte segment #b11011101)
2238 (emit-fp-op segment dest #b010)))))
2240 ;;; Arithmetic ops are all done with at least one operand at top of
2241 ;;; stack. The other operand is is another register or a 32/64 bit
2244 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2245 ;;; that these conflict with the Gdb conventions for binops. To reduce
2246 ;;; the confusion I've added comments showing the mathamatical
2247 ;;; operation and the two syntaxes. By the ASM386 convention the
2248 ;;; instruction syntax is:
2251 ;;; or Fop Destination, Source
2253 ;;; If only one operand is given then it is the source and the
2254 ;;; destination is ST(0). There are reversed forms of the fsub and
2255 ;;; fdiv instructions inducated by an 'R' suffix.
2257 ;;; The mathematical operation for the non-reverse form is always:
2258 ;;; destination = destination op source
2260 ;;; For the reversed form it is:
2261 ;;; destination = source op destination
2263 ;;; The instructions below only accept one operand at present which is
2264 ;;; usually the source. I've hack in extra instructions to implement
2265 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2266 ;;; the operand is the destination with the source being ST(0).
2269 ;;; st(0) = st(0) + memory or st(i).
2270 (define-instruction fadd (segment source)
2271 (:printer floating-point ((op '(#b000 #b000))))
2273 (emit-byte segment #b11011000)
2274 (emit-fp-op segment source #b000)))
2277 ;;; st(0) = st(0) + memory or st(i).
2278 (define-instruction faddd (segment source)
2279 (:printer floating-point ((op '(#b100 #b000))))
2280 (:printer floating-point-fp ((op '(#b000 #b000))))
2282 (if (fp-reg-tn-p source)
2283 (emit-byte segment #b11011000)
2284 (emit-byte segment #b11011100))
2285 (emit-fp-op segment source #b000)))
2287 ;;; Add double destination st(i):
2288 ;;; st(i) = st(0) + st(i).
2289 (define-instruction fadd-sti (segment destination)
2290 (:printer floating-point-fp ((op '(#b100 #b000))))
2292 (aver (fp-reg-tn-p destination))
2293 (emit-byte segment #b11011100)
2294 (emit-fp-op segment destination #b000)))
2296 (define-instruction faddp-sti (segment destination)
2297 (:printer floating-point-fp ((op '(#b110 #b000))))
2299 (aver (fp-reg-tn-p destination))
2300 (emit-byte segment #b11011110)
2301 (emit-fp-op segment destination #b000)))
2303 ;;; Subtract single:
2304 ;;; st(0) = st(0) - memory or st(i).
2305 (define-instruction fsub (segment source)
2306 (:printer floating-point ((op '(#b000 #b100))))
2308 (emit-byte segment #b11011000)
2309 (emit-fp-op segment source #b100)))
2311 ;;; Subtract single, reverse:
2312 ;;; st(0) = memory or st(i) - st(0).
2313 (define-instruction fsubr (segment source)
2314 (:printer floating-point ((op '(#b000 #b101))))
2316 (emit-byte segment #b11011000)
2317 (emit-fp-op segment source #b101)))
2319 ;;; Subtract double:
2320 ;;; st(0) = st(0) - memory or st(i).
2321 (define-instruction fsubd (segment source)
2322 (:printer floating-point ((op '(#b100 #b100))))
2323 (:printer floating-point-fp ((op '(#b000 #b100))))
2325 (if (fp-reg-tn-p source)
2326 (emit-byte segment #b11011000)
2327 (emit-byte segment #b11011100))
2328 (emit-fp-op segment source #b100)))
2330 ;;; Subtract double, reverse:
2331 ;;; st(0) = memory or st(i) - st(0).
2332 (define-instruction fsubrd (segment source)
2333 (:printer floating-point ((op '(#b100 #b101))))
2334 (:printer floating-point-fp ((op '(#b000 #b101))))
2336 (if (fp-reg-tn-p source)
2337 (emit-byte segment #b11011000)
2338 (emit-byte segment #b11011100))
2339 (emit-fp-op segment source #b101)))
2341 ;;; Subtract double, destination st(i):
2342 ;;; st(i) = st(i) - st(0).
2344 ;;; ASM386 syntax: FSUB ST(i), ST
2345 ;;; Gdb syntax: fsubr %st,%st(i)
2346 (define-instruction fsub-sti (segment destination)
2347 (:printer floating-point-fp ((op '(#b100 #b101))))
2349 (aver (fp-reg-tn-p destination))
2350 (emit-byte segment #b11011100)
2351 (emit-fp-op segment destination #b101)))
2353 (define-instruction fsubp-sti (segment destination)
2354 (:printer floating-point-fp ((op '(#b110 #b101))))
2356 (aver (fp-reg-tn-p destination))
2357 (emit-byte segment #b11011110)
2358 (emit-fp-op segment destination #b101)))
2360 ;;; Subtract double, reverse, destination st(i):
2361 ;;; st(i) = st(0) - st(i).
2363 ;;; ASM386 syntax: FSUBR ST(i), ST
2364 ;;; Gdb syntax: fsub %st,%st(i)
2365 (define-instruction fsubr-sti (segment destination)
2366 (:printer floating-point-fp ((op '(#b100 #b100))))
2368 (aver (fp-reg-tn-p destination))
2369 (emit-byte segment #b11011100)
2370 (emit-fp-op segment destination #b100)))
2372 (define-instruction fsubrp-sti (segment destination)
2373 (:printer floating-point-fp ((op '(#b110 #b100))))
2375 (aver (fp-reg-tn-p destination))
2376 (emit-byte segment #b11011110)
2377 (emit-fp-op segment destination #b100)))
2379 ;;; Multiply single:
2380 ;;; st(0) = st(0) * memory or st(i).
2381 (define-instruction fmul (segment source)
2382 (:printer floating-point ((op '(#b000 #b001))))
2384 (emit-byte segment #b11011000)
2385 (emit-fp-op segment source #b001)))
2387 ;;; Multiply double:
2388 ;;; st(0) = st(0) * memory or st(i).
2389 (define-instruction fmuld (segment source)
2390 (:printer floating-point ((op '(#b100 #b001))))
2391 (:printer floating-point-fp ((op '(#b000 #b001))))
2393 (if (fp-reg-tn-p source)
2394 (emit-byte segment #b11011000)
2395 (emit-byte segment #b11011100))
2396 (emit-fp-op segment source #b001)))
2398 ;;; Multiply double, destination st(i):
2399 ;;; st(i) = st(i) * st(0).
2400 (define-instruction fmul-sti (segment destination)
2401 (:printer floating-point-fp ((op '(#b100 #b001))))
2403 (aver (fp-reg-tn-p destination))
2404 (emit-byte segment #b11011100)
2405 (emit-fp-op segment destination #b001)))
2408 ;;; st(0) = st(0) / memory or st(i).
2409 (define-instruction fdiv (segment source)
2410 (:printer floating-point ((op '(#b000 #b110))))
2412 (emit-byte segment #b11011000)
2413 (emit-fp-op segment source #b110)))
2415 ;;; Divide single, reverse:
2416 ;;; st(0) = memory or st(i) / st(0).
2417 (define-instruction fdivr (segment source)
2418 (:printer floating-point ((op '(#b000 #b111))))
2420 (emit-byte segment #b11011000)
2421 (emit-fp-op segment source #b111)))
2424 ;;; st(0) = st(0) / memory or st(i).
2425 (define-instruction fdivd (segment source)
2426 (:printer floating-point ((op '(#b100 #b110))))
2427 (:printer floating-point-fp ((op '(#b000 #b110))))
2429 (if (fp-reg-tn-p source)
2430 (emit-byte segment #b11011000)
2431 (emit-byte segment #b11011100))
2432 (emit-fp-op segment source #b110)))
2434 ;;; Divide double, reverse:
2435 ;;; st(0) = memory or st(i) / st(0).
2436 (define-instruction fdivrd (segment source)
2437 (:printer floating-point ((op '(#b100 #b111))))
2438 (:printer floating-point-fp ((op '(#b000 #b111))))
2440 (if (fp-reg-tn-p source)
2441 (emit-byte segment #b11011000)
2442 (emit-byte segment #b11011100))
2443 (emit-fp-op segment source #b111)))
2445 ;;; Divide double, destination st(i):
2446 ;;; st(i) = st(i) / st(0).
2448 ;;; ASM386 syntax: FDIV ST(i), ST
2449 ;;; Gdb syntax: fdivr %st,%st(i)
2450 (define-instruction fdiv-sti (segment destination)
2451 (:printer floating-point-fp ((op '(#b100 #b111))))
2453 (aver (fp-reg-tn-p destination))
2454 (emit-byte segment #b11011100)
2455 (emit-fp-op segment destination #b111)))
2457 ;;; Divide double, reverse, destination st(i):
2458 ;;; st(i) = st(0) / st(i).
2460 ;;; ASM386 syntax: FDIVR ST(i), ST
2461 ;;; Gdb syntax: fdiv %st,%st(i)
2462 (define-instruction fdivr-sti (segment destination)
2463 (:printer floating-point-fp ((op '(#b100 #b110))))
2465 (aver (fp-reg-tn-p destination))
2466 (emit-byte segment #b11011100)
2467 (emit-fp-op segment destination #b110)))
2469 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2470 (define-instruction fxch (segment source)
2471 (:printer floating-point-fp ((op '(#b001 #b001))))
2473 (aver (and (tn-p source)
2474 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers)))
2475 (emit-byte segment #b11011001)
2476 (emit-fp-op segment source #b001)))
2478 ;;; Push 32-bit integer to st0.
2479 (define-instruction fild (segment source)
2480 (:printer floating-point ((op '(#b011 #b000))))
2482 (emit-byte segment #b11011011)
2483 (emit-fp-op segment source #b000)))
2485 ;;; Push 64-bit integer to st0.
2486 (define-instruction fildl (segment source)
2487 (:printer floating-point ((op '(#b111 #b101))))
2489 (emit-byte segment #b11011111)
2490 (emit-fp-op segment source #b101)))
2492 ;;; Store 32-bit integer.
2493 (define-instruction fist (segment dest)
2494 (:printer floating-point ((op '(#b011 #b010))))
2496 (emit-byte segment #b11011011)
2497 (emit-fp-op segment dest #b010)))
2499 ;;; Store and pop 32-bit integer.
2500 (define-instruction fistp (segment dest)
2501 (:printer floating-point ((op '(#b011 #b011))))
2503 (emit-byte segment #b11011011)
2504 (emit-fp-op segment dest #b011)))
2506 ;;; Store and pop 64-bit integer.
2507 (define-instruction fistpl (segment dest)
2508 (:printer floating-point ((op '(#b111 #b111))))
2510 (emit-byte segment #b11011111)
2511 (emit-fp-op segment dest #b111)))
2513 ;;; Store single from st(0) and pop.
2514 (define-instruction fstp (segment dest)
2515 (:printer floating-point ((op '(#b001 #b011))))
2517 (cond ((fp-reg-tn-p dest)
2518 (emit-byte segment #b11011101)
2519 (emit-fp-op segment dest #b011))
2521 (emit-byte segment #b11011001)
2522 (emit-fp-op segment dest #b011)))))
2524 ;;; Store double from st(0) and pop.
2525 (define-instruction fstpd (segment dest)
2526 (:printer floating-point ((op '(#b101 #b011))))
2527 (:printer floating-point-fp ((op '(#b101 #b011))))
2529 (cond ((fp-reg-tn-p dest)
2530 (emit-byte segment #b11011101)
2531 (emit-fp-op segment dest #b011))
2533 (emit-byte segment #b11011101)
2534 (emit-fp-op segment dest #b011)))))
2536 ;;; Store long from st(0) and pop.
2537 (define-instruction fstpl (segment dest)
2538 (:printer floating-point ((op '(#b011 #b111))))
2540 (emit-byte segment #b11011011)
2541 (emit-fp-op segment dest #b111)))
2543 ;;; Decrement stack-top pointer.
2544 (define-instruction fdecstp (segment)
2545 (:printer floating-point-no ((op #b10110)))
2547 (emit-byte segment #b11011001)
2548 (emit-byte segment #b11110110)))
2550 ;;; Increment stack-top pointer.
2551 (define-instruction fincstp (segment)
2552 (:printer floating-point-no ((op #b10111)))
2554 (emit-byte segment #b11011001)
2555 (emit-byte segment #b11110111)))
2557 ;;; Free fp register.
2558 (define-instruction ffree (segment dest)
2559 (:printer floating-point-fp ((op '(#b101 #b000))))
2561 (emit-byte segment #b11011101)
2562 (emit-fp-op segment dest #b000)))
2564 (define-instruction fabs (segment)
2565 (:printer floating-point-no ((op #b00001)))
2567 (emit-byte segment #b11011001)
2568 (emit-byte segment #b11100001)))
2570 (define-instruction fchs (segment)
2571 (:printer floating-point-no ((op #b00000)))
2573 (emit-byte segment #b11011001)
2574 (emit-byte segment #b11100000)))
2576 (define-instruction frndint(segment)
2577 (:printer floating-point-no ((op #b11100)))
2579 (emit-byte segment #b11011001)
2580 (emit-byte segment #b11111100)))
2583 (define-instruction fninit(segment)
2584 (:printer floating-point-5 ((op #b00011)))
2586 (emit-byte segment #b11011011)
2587 (emit-byte segment #b11100011)))
2589 ;;; Store Status Word to AX.
2590 (define-instruction fnstsw(segment)
2591 (:printer floating-point-st ((op #b00000)))
2593 (emit-byte segment #b11011111)
2594 (emit-byte segment #b11100000)))
2596 ;;; Load Control Word.
2598 ;;; src must be a memory location
2599 (define-instruction fldcw(segment src)
2600 (:printer floating-point ((op '(#b001 #b101))))
2602 (emit-byte segment #b11011001)
2603 (emit-fp-op segment src #b101)))
2605 ;;; Store Control Word.
2606 (define-instruction fnstcw(segment dst)
2607 (:printer floating-point ((op '(#b001 #b111))))
2609 (emit-byte segment #b11011001)
2610 (emit-fp-op segment dst #b111)))
2612 ;;; Store FP Environment.
2613 (define-instruction fstenv(segment dst)
2614 (:printer floating-point ((op '(#b001 #b110))))
2616 (emit-byte segment #b11011001)
2617 (emit-fp-op segment dst #b110)))
2619 ;;; Restore FP Environment.
2620 (define-instruction fldenv(segment src)
2621 (:printer floating-point ((op '(#b001 #b100))))
2623 (emit-byte segment #b11011001)
2624 (emit-fp-op segment src #b100)))
2627 (define-instruction fsave(segment dst)
2628 (:printer floating-point ((op '(#b101 #b110))))
2630 (emit-byte segment #b11011101)
2631 (emit-fp-op segment dst #b110)))
2633 ;;; Restore FP State.
2634 (define-instruction frstor(segment src)
2635 (:printer floating-point ((op '(#b101 #b100))))
2637 (emit-byte segment #b11011101)
2638 (emit-fp-op segment src #b100)))
2640 ;;; Clear exceptions.
2641 (define-instruction fnclex(segment)
2642 (:printer floating-point-5 ((op #b00010)))
2644 (emit-byte segment #b11011011)
2645 (emit-byte segment #b11100010)))
2648 (define-instruction fcom (segment src)
2649 (:printer floating-point ((op '(#b000 #b010))))
2651 (emit-byte segment #b11011000)
2652 (emit-fp-op segment src #b010)))
2654 (define-instruction fcomd (segment src)
2655 (:printer floating-point ((op '(#b100 #b010))))
2656 (:printer floating-point-fp ((op '(#b000 #b010))))
2658 (if (fp-reg-tn-p src)
2659 (emit-byte segment #b11011000)
2660 (emit-byte segment #b11011100))
2661 (emit-fp-op segment src #b010)))
2663 ;;; Compare ST1 to ST0, popping the stack twice.
2664 (define-instruction fcompp (segment)
2665 (:printer floating-point-3 ((op '(#b110 #b011001))))
2667 (emit-byte segment #b11011110)
2668 (emit-byte segment #b11011001)))
2670 ;;; unordered comparison
2671 (define-instruction fucom (segment src)
2672 (:printer floating-point-fp ((op '(#b101 #b100))))
2674 (aver (fp-reg-tn-p src))
2675 (emit-byte segment #b11011101)
2676 (emit-fp-op segment src #b100)))
2678 (define-instruction ftst (segment)
2679 (:printer floating-point-no ((op #b00100)))
2681 (emit-byte segment #b11011001)
2682 (emit-byte segment #b11100100)))
2686 (define-instruction fsqrt(segment)
2687 (:printer floating-point-no ((op #b11010)))
2689 (emit-byte segment #b11011001)
2690 (emit-byte segment #b11111010)))
2692 (define-instruction fscale(segment)
2693 (:printer floating-point-no ((op #b11101)))
2695 (emit-byte segment #b11011001)
2696 (emit-byte segment #b11111101)))
2698 (define-instruction fxtract(segment)
2699 (:printer floating-point-no ((op #b10100)))
2701 (emit-byte segment #b11011001)
2702 (emit-byte segment #b11110100)))
2704 (define-instruction fsin(segment)
2705 (:printer floating-point-no ((op #b11110)))
2707 (emit-byte segment #b11011001)
2708 (emit-byte segment #b11111110)))
2710 (define-instruction fcos(segment)
2711 (:printer floating-point-no ((op #b11111)))
2713 (emit-byte segment #b11011001)
2714 (emit-byte segment #b11111111)))
2716 (define-instruction fprem1(segment)
2717 (:printer floating-point-no ((op #b10101)))
2719 (emit-byte segment #b11011001)
2720 (emit-byte segment #b11110101)))
2722 (define-instruction fprem(segment)
2723 (:printer floating-point-no ((op #b11000)))
2725 (emit-byte segment #b11011001)
2726 (emit-byte segment #b11111000)))
2728 (define-instruction fxam (segment)
2729 (:printer floating-point-no ((op #b00101)))
2731 (emit-byte segment #b11011001)
2732 (emit-byte segment #b11100101)))
2734 ;;; These do push/pop to stack and need special handling
2735 ;;; in any VOPs that use them. See the book.
2737 ;;; st0 <- st1*log2(st0)
2738 (define-instruction fyl2x(segment) ; pops stack
2739 (:printer floating-point-no ((op #b10001)))
2741 (emit-byte segment #b11011001)
2742 (emit-byte segment #b11110001)))
2744 (define-instruction fyl2xp1(segment)
2745 (:printer floating-point-no ((op #b11001)))
2747 (emit-byte segment #b11011001)
2748 (emit-byte segment #b11111001)))
2750 (define-instruction f2xm1(segment)
2751 (:printer floating-point-no ((op #b10000)))
2753 (emit-byte segment #b11011001)
2754 (emit-byte segment #b11110000)))
2756 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
2757 (:printer floating-point-no ((op #b10010)))
2759 (emit-byte segment #b11011001)
2760 (emit-byte segment #b11110010)))
2762 (define-instruction fpatan(segment) ; POPS STACK
2763 (:printer floating-point-no ((op #b10011)))
2765 (emit-byte segment #b11011001)
2766 (emit-byte segment #b11110011)))
2768 ;;;; loading constants
2770 (define-instruction fldz(segment)
2771 (:printer floating-point-no ((op #b01110)))
2773 (emit-byte segment #b11011001)
2774 (emit-byte segment #b11101110)))
2776 (define-instruction fld1(segment)
2777 (:printer floating-point-no ((op #b01000)))
2779 (emit-byte segment #b11011001)
2780 (emit-byte segment #b11101000)))
2782 (define-instruction fldpi(segment)
2783 (:printer floating-point-no ((op #b01011)))
2785 (emit-byte segment #b11011001)
2786 (emit-byte segment #b11101011)))
2788 (define-instruction fldl2t(segment)
2789 (:printer floating-point-no ((op #b01001)))
2791 (emit-byte segment #b11011001)
2792 (emit-byte segment #b11101001)))
2794 (define-instruction fldl2e(segment)
2795 (:printer floating-point-no ((op #b01010)))
2797 (emit-byte segment #b11011001)
2798 (emit-byte segment #b11101010)))
2800 (define-instruction fldlg2(segment)
2801 (:printer floating-point-no ((op #b01100)))
2803 (emit-byte segment #b11011001)
2804 (emit-byte segment #b11101100)))
2806 (define-instruction fldln2(segment)
2807 (:printer floating-point-no ((op #b01101)))
2809 (emit-byte segment #b11011001)
2810 (emit-byte segment #b11101101)))
2814 (define-instruction cpuid (segment)
2815 (:printer two-bytes ((op '(#b00001111 #b10100010))))
2817 (emit-byte segment #b00001111)
2818 (emit-byte segment #b10100010)))
2820 (define-instruction rdtsc (segment)
2821 (:printer two-bytes ((op '(#b00001111 #b00110001))))
2823 (emit-byte segment #b00001111)
2824 (emit-byte segment #b00110001)))
2826 ;;;; Late VM definitions
2827 (defun canonicalize-inline-constant (constant)
2828 (let ((first (car constant)))
2830 (single-float (setf constant (list :single-float first)))
2831 (double-float (setf constant (list :double-float first)))))
2832 (destructuring-bind (type value) constant
2834 ((:byte :word :dword)
2835 (aver (integerp value))
2838 (aver (base-char-p value))
2839 (cons :byte (char-code value)))
2841 (aver (characterp value))
2842 (cons :dword (char-code value)))
2844 (aver (typep value 'single-float))
2845 (cons :dword (ldb (byte 32 0) (single-float-bits value))))
2846 ((:double-float-bits)
2847 (aver (integerp value))
2848 (cons :double-float (ldb (byte 64 0) value)))
2850 (aver (typep value 'double-float))
2852 (ldb (byte 64 0) (logior (ash (double-float-high-bits value) 32)
2853 (double-float-low-bits value))))))))
2855 (defun inline-constant-value (constant)
2856 (let ((label (gen-label))
2857 (size (ecase (car constant)
2858 ((:byte :word :dword) (car constant))
2859 (:double-float :dword))))
2860 (values label (make-ea size
2861 :disp (make-fixup nil :code-object label)))))
2863 (defun emit-constant-segment-header (constants optimize)
2864 (declare (ignore constants))
2865 (loop repeat (if optimize 64 16) do (inst byte #x90)))
2867 (defun size-nbyte (size)
2874 (defun sort-inline-constants (constants)
2875 (stable-sort constants #'> :key (lambda (constant)
2876 (size-nbyte (caar constant)))))
2878 (defun emit-inline-constant (constant label)
2879 (let ((size (size-nbyte (car constant))))
2880 (emit-alignment (integer-length (1- size)))
2882 (let ((val (cdr constant)))
2884 do (inst byte (ldb (byte 8 0) val))
2885 (setf val (ash val -8))))))