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 ;;; FIXME: In CMU CL, the code in this file seems to be fully
19 ;;; compiled, not byte compiled. I'm not sure that's reasonable:
20 ;;; there's a lot of code in this file, and considering the overall
21 ;;; speed of the compiler, having some byte-interpretation overhead
22 ;;; for every few bytes emitted doesn't seem likely to be noticeable.
23 ;;; I'd like to see what happens if I come back and byte-compile this
26 ;;; Note: In CMU CL, this used to be a call to SET-DISASSEM-PARAMS.
27 (setf sb!disassem:*disassem-inst-alignment-bytes* 1)
29 (deftype reg () '(unsigned-byte 3))
31 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
33 (defun offset-next (value dstate)
34 (declare (type integer value)
35 (type sb!disassem:disassem-state dstate))
36 (+ (sb!disassem:dstate-next-addr dstate) value))
38 (defparameter *default-address-size*
39 ;; Actually, :DWORD is the only one really supported.
42 (defparameter *byte-reg-names*
43 #(al cl dl bl ah ch dh bh))
44 (defparameter *word-reg-names*
45 #(ax cx dx bx sp bp si di))
46 (defparameter *dword-reg-names*
47 #(eax ecx edx ebx esp ebp esi edi))
49 (defun print-reg-with-width (value width stream dstate)
50 (declare (ignore dstate))
51 (princ (aref (ecase width
52 (:byte *byte-reg-names*)
53 (:word *word-reg-names*)
54 (:dword *dword-reg-names*))
57 ;; XXX plus should do some source-var notes
60 (defun print-reg (value stream dstate)
61 (declare (type reg value)
63 (type sb!disassem:disassem-state dstate))
64 (print-reg-with-width value
65 (sb!disassem:dstate-get-prop dstate 'width)
69 (defun print-word-reg (value stream dstate)
70 (declare (type reg value)
72 (type sb!disassem:disassem-state dstate))
73 (print-reg-with-width value
74 (or (sb!disassem:dstate-get-prop dstate 'word-width)
75 +default-operand-size+)
79 (defun print-byte-reg (value stream dstate)
80 (declare (type reg value)
82 (type sb!disassem:disassem-state dstate))
83 (print-reg-with-width value :byte stream dstate))
85 (defun print-addr-reg (value stream dstate)
86 (declare (type reg value)
88 (type sb!disassem:disassem-state dstate))
89 (print-reg-with-width value *default-address-size* stream dstate))
91 (defun print-reg/mem (value stream dstate)
92 (declare (type (or list reg) value)
94 (type sb!disassem:disassem-state dstate))
95 (if (typep value 'reg)
96 (print-reg value stream dstate)
97 (print-mem-access value stream nil dstate)))
99 ;; Same as print-reg/mem, but prints an explicit size indicator for
100 ;; memory references.
101 (defun print-sized-reg/mem (value stream dstate)
102 (declare (type (or list reg) value)
104 (type sb!disassem:disassem-state dstate))
105 (if (typep value 'reg)
106 (print-reg value stream dstate)
107 (print-mem-access value stream t dstate)))
109 (defun print-byte-reg/mem (value stream dstate)
110 (declare (type (or list reg) value)
112 (type sb!disassem:disassem-state dstate))
113 (if (typep value 'reg)
114 (print-byte-reg value stream dstate)
115 (print-mem-access value stream t dstate)))
117 (defun print-label (value stream dstate)
118 (declare (ignore dstate))
119 (sb!disassem:princ16 value stream))
121 ;;; Returns either an integer, meaning a register, or a list of
122 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
123 ;;; may be missing or nil to indicate that it's not used or has the
124 ;;; obvious default value (e.g., 1 for the index-scale).
125 (defun prefilter-reg/mem (value dstate)
126 (declare (type list value)
127 (type sb!disassem:disassem-state dstate))
128 (let ((mod (car value))
130 (declare (type (unsigned-byte 2) mod)
131 (type (unsigned-byte 3) r/m))
137 (let ((sib (sb!disassem:read-suffix 8 dstate)))
138 (declare (type (unsigned-byte 8) sib))
139 (let ((base-reg (ldb (byte 3 0) sib))
140 (index-reg (ldb (byte 3 3) sib))
141 (index-scale (ldb (byte 2 6) sib)))
142 (declare (type (unsigned-byte 3) base-reg index-reg)
143 (type (unsigned-byte 2) index-scale))
147 (if (= base-reg #b101)
148 (sb!disassem:read-signed-suffix 32 dstate)
151 (sb!disassem:read-signed-suffix 8 dstate))
153 (sb!disassem:read-signed-suffix 32 dstate)))))
154 (list (if (and (= mod #b00) (= base-reg #b101)) nil base-reg)
156 (if (= index-reg #b100) nil index-reg)
157 (ash 1 index-scale))))))
158 ((and (= mod #b00) (= r/m #b101))
159 (list nil (sb!disassem:read-signed-suffix 32 dstate)) )
163 (list r/m (sb!disassem:read-signed-suffix 8 dstate)))
165 (list r/m (sb!disassem:read-signed-suffix 32 dstate))))))
168 ;;; This is a sort of bogus prefilter that just stores the info globally for
169 ;;; other people to use; it probably never gets printed.
170 (defun prefilter-width (value dstate)
171 (setf (sb!disassem:dstate-get-prop dstate 'width)
175 ;; set by a prefix instruction
176 (or (sb!disassem:dstate-get-prop dstate 'word-width)
177 +default-operand-size+)))
178 (when (not (eql word-width +default-operand-size+))
180 (setf (sb!disassem:dstate-get-prop dstate 'word-width)
181 +default-operand-size+))
184 (defun read-address (value dstate)
185 (declare (ignore value)) ; always nil anyway
186 (sb!disassem:read-suffix (width-bits *default-address-size*) dstate))
188 (defun width-bits (width)
198 ;;;; disassembler argument types
200 (sb!disassem:define-argument-type displacement
202 :use-label #'offset-next
203 :printer #'(lambda (value stream dstate)
204 (sb!disassem:maybe-note-assembler-routine value nil dstate)
205 (print-label value stream dstate)))
207 (sb!disassem:define-argument-type accum
208 :printer #'(lambda (value stream dstate)
209 (declare (ignore value)
211 (type sb!disassem:disassem-state dstate))
212 (print-reg 0 stream dstate))
215 (sb!disassem:define-argument-type word-accum
216 :printer #'(lambda (value stream dstate)
217 (declare (ignore value)
219 (type sb!disassem:disassem-state dstate))
220 (print-word-reg 0 stream dstate)))
222 (sb!disassem:define-argument-type reg
223 :printer #'print-reg)
225 (sb!disassem:define-argument-type addr-reg
226 :printer #'print-addr-reg)
228 (sb!disassem:define-argument-type word-reg
229 :printer #'print-word-reg)
231 (sb!disassem:define-argument-type imm-addr
232 :prefilter #'read-address
233 :printer #'print-label)
235 (sb!disassem:define-argument-type imm-data
236 :prefilter #'(lambda (value dstate)
237 (declare (ignore value)) ; always nil anyway
238 (sb!disassem:read-suffix
239 (width-bits (sb!disassem:dstate-get-prop dstate 'width))
243 (sb!disassem:define-argument-type signed-imm-data
244 :prefilter #'(lambda (value dstate)
245 (declare (ignore value)) ; always nil anyway
246 (let ((width (sb!disassem:dstate-get-prop dstate 'width)))
247 (sb!disassem:read-signed-suffix (width-bits width) dstate)))
250 (sb!disassem:define-argument-type signed-imm-byte
251 :prefilter #'(lambda (value dstate)
252 (declare (ignore value)) ; always nil anyway
253 (sb!disassem:read-signed-suffix 8 dstate)))
255 (sb!disassem:define-argument-type signed-imm-dword
256 :prefilter #'(lambda (value dstate)
257 (declare (ignore value)) ; always nil anyway
258 (sb!disassem:read-signed-suffix 32 dstate)))
260 (sb!disassem:define-argument-type imm-word
261 :prefilter #'(lambda (value dstate)
262 (declare (ignore value)) ; always nil anyway
264 (or (sb!disassem:dstate-get-prop dstate 'word-width)
265 +default-operand-size+)))
266 (sb!disassem:read-suffix (width-bits width) dstate))))
268 ;;; needed for the ret imm16 instruction
269 (sb!disassem:define-argument-type imm-word-16
270 :prefilter #'(lambda (value dstate)
271 (declare (ignore value)) ; always nil anyway
272 (sb!disassem:read-suffix 16 dstate)))
274 (sb!disassem:define-argument-type reg/mem
275 :prefilter #'prefilter-reg/mem
276 :printer #'print-reg/mem)
277 (sb!disassem:define-argument-type sized-reg/mem
278 ;; Same as reg/mem, but prints an explicit size indicator for
279 ;; memory references.
280 :prefilter #'prefilter-reg/mem
281 :printer #'print-sized-reg/mem)
282 (sb!disassem:define-argument-type byte-reg/mem
283 :prefilter #'prefilter-reg/mem
284 :printer #'print-byte-reg/mem)
287 (eval-when (:compile-toplevel :load-toplevel :execute)
288 (defun print-fp-reg (value stream dstate)
289 (declare (ignore dstate))
290 (format stream "FR~D" value))
291 (defun prefilter-fp-reg (value dstate)
293 (declare (ignore dstate))
296 (sb!disassem:define-argument-type fp-reg
297 :prefilter #'prefilter-fp-reg
298 :printer #'print-fp-reg)
300 (sb!disassem:define-argument-type width
301 :prefilter #'prefilter-width
302 :printer #'(lambda (value stream dstate)
305 (and (numberp value) (zerop value))) ; zzz jrd
308 ;; set by a prefix instruction
309 (or (sb!disassem:dstate-get-prop dstate 'word-width)
310 +default-operand-size+)))
311 (princ (schar (symbol-name word-width) 0) stream)))))
313 (eval-when (:compile-toplevel :load-toplevel :execute)
314 (defparameter *conditions*
317 (:b . 2) (:nae . 2) (:c . 2)
318 (:nb . 3) (:ae . 3) (:nc . 3)
319 (:eq . 4) (:e . 4) (:z . 4)
326 (:np . 11) (:po . 11)
327 (:l . 12) (:nge . 12)
328 (:nl . 13) (:ge . 13)
329 (:le . 14) (:ng . 14)
330 (:nle . 15) (:g . 15)))
331 (defparameter *condition-name-vec*
332 (let ((vec (make-array 16 :initial-element nil)))
333 (dolist (cond *conditions*)
334 (when (null (aref vec (cdr cond)))
335 (setf (aref vec (cdr cond)) (car cond))))
339 ;;; Set assembler parameters. (In CMU CL, this was done with
340 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
341 (eval-when (:compile-toplevel :load-toplevel :execute)
342 (setf sb!assem:*assem-scheduler-p* nil))
344 (sb!disassem:define-argument-type condition-code
345 :printer *condition-name-vec*)
347 (defun conditional-opcode (condition)
348 (cdr (assoc condition *conditions* :test #'eq)))
350 ;;;; disassembler instruction formats
352 (eval-when (:compile-toplevel :execute)
353 (defun swap-if (direction field1 separator field2)
354 `(:if (,direction :constant 0)
355 (,field1 ,separator ,field2)
356 (,field2 ,separator ,field1))))
358 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
359 (op :field (byte 8 0))
364 (sb!disassem:define-instruction-format (simple 8)
365 (op :field (byte 7 1))
366 (width :field (byte 1 0) :type 'width)
371 ;;; Same as simple, but with direction bit
372 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
373 (op :field (byte 6 2))
374 (dir :field (byte 1 1)))
376 ;;; Same as simple, but with the immediate value occurring by default,
377 ;;; and with an appropiate printer.
378 (sb!disassem:define-instruction-format (accum-imm 8
380 :default-printer '(:name
381 :tab accum ", " imm))
382 (imm :type 'imm-data))
384 (sb!disassem:define-instruction-format (reg-no-width 8
385 :default-printer '(:name :tab reg))
386 (op :field (byte 5 3))
387 (reg :field (byte 3 0) :type 'word-reg)
389 (accum :type 'word-accum)
392 ;;; adds a width field to reg-no-width
393 (sb!disassem:define-instruction-format (reg 8
394 :default-printer '(:name :tab reg))
395 (op :field (byte 4 4))
396 (width :field (byte 1 3) :type 'width)
397 (reg :field (byte 3 0) :type 'reg)
403 ;;; Same as reg, but with direction bit
404 (sb!disassem:define-instruction-format (reg-dir 8 :include 'reg)
405 (op :field (byte 3 5))
406 (dir :field (byte 1 4)))
408 (sb!disassem:define-instruction-format (two-bytes 16
409 :default-printer '(:name))
410 (op :fields (list (byte 8 0) (byte 8 8))))
412 (sb!disassem:define-instruction-format (reg-reg/mem 16
414 `(:name :tab reg ", " reg/mem))
415 (op :field (byte 7 1))
416 (width :field (byte 1 0) :type 'width)
417 (reg/mem :fields (list (byte 2 14) (byte 3 8))
419 (reg :field (byte 3 11) :type 'reg)
423 ;;; same as reg-reg/mem, but with direction bit
424 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
425 :include 'reg-reg/mem
429 ,(swap-if 'dir 'reg/mem ", " 'reg)))
430 (op :field (byte 6 2))
431 (dir :field (byte 1 1)))
433 ;;; Same as reg-rem/mem, but uses the reg field as a second op code.
434 (sb!disassem:define-instruction-format (reg/mem 16
435 :default-printer '(:name :tab reg/mem))
436 (op :fields (list (byte 7 1) (byte 3 11)))
437 (width :field (byte 1 0) :type 'width)
438 (reg/mem :fields (list (byte 2 14) (byte 3 8))
439 :type 'sized-reg/mem)
443 ;;; Same as reg/mem, but with the immediate value occurring by default,
444 ;;; and with an appropiate printer.
445 (sb!disassem:define-instruction-format (reg/mem-imm 16
448 '(:name :tab reg/mem ", " imm))
449 (reg/mem :type 'sized-reg/mem)
450 (imm :type 'imm-data))
452 ;;; Same as reg/mem, but with using the accumulator in the default printer
453 (sb!disassem:define-instruction-format
455 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
456 (reg/mem :type 'reg/mem) ; don't need a size
457 (accum :type 'accum))
459 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
460 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
462 `(:name :tab reg ", " reg/mem))
463 (prefix :field (byte 8 0) :value #b00001111)
464 (op :field (byte 7 9))
465 (width :field (byte 1 8) :type 'width)
466 (reg/mem :fields (list (byte 2 22) (byte 3 16))
468 (reg :field (byte 3 19) :type 'reg)
472 ;;; Same as reg/mem, but with a prefix of #b00001111
473 (sb!disassem:define-instruction-format (ext-reg/mem 24
474 :default-printer '(:name :tab reg/mem))
475 (prefix :field (byte 8 0) :value #b00001111)
476 (op :fields (list (byte 7 9) (byte 3 19)))
477 (width :field (byte 1 8) :type 'width)
478 (reg/mem :fields (list (byte 2 22) (byte 3 16))
479 :type 'sized-reg/mem)
483 ;;;; This section was added by jrd, for fp instructions.
485 ;;; regular fp inst to/from registers/memory
486 (sb!disassem:define-instruction-format (floating-point 16
488 `(:name :tab reg/mem))
489 (prefix :field (byte 5 3) :value #b11011)
490 (op :fields (list (byte 3 0) (byte 3 11)))
491 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
493 ;;; fp insn to/from fp reg
494 (sb!disassem:define-instruction-format (floating-point-fp 16
495 :default-printer `(:name :tab fp-reg))
496 (prefix :field (byte 5 3) :value #b11011)
497 (suffix :field (byte 2 14) :value #b11)
498 (op :fields (list (byte 3 0) (byte 3 11)))
499 (fp-reg :field (byte 3 8) :type 'fp-reg))
501 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
502 (sb!disassem:define-instruction-format
503 (floating-point-fp-d 16
504 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
505 (prefix :field (byte 5 3) :value #b11011)
506 (suffix :field (byte 2 14) :value #b11)
507 (op :fields (list (byte 2 0) (byte 3 11)))
508 (d :field (byte 1 2))
509 (fp-reg :field (byte 3 8) :type 'fp-reg))
512 ;;; (added by (?) pfw)
513 ;;; fp no operand isns
514 (sb!disassem:define-instruction-format (floating-point-no 16
515 :default-printer '(:name))
516 (prefix :field (byte 8 0) :value #b11011001)
517 (suffix :field (byte 3 13) :value #b111)
518 (op :field (byte 5 8)))
520 (sb!disassem:define-instruction-format (floating-point-3 16
521 :default-printer '(:name))
522 (prefix :field (byte 5 3) :value #b11011)
523 (suffix :field (byte 2 14) :value #b11)
524 (op :fields (list (byte 3 0) (byte 6 8))))
526 (sb!disassem:define-instruction-format (floating-point-5 16
527 :default-printer '(:name))
528 (prefix :field (byte 8 0) :value #b11011011)
529 (suffix :field (byte 3 13) :value #b111)
530 (op :field (byte 5 8)))
532 (sb!disassem:define-instruction-format (floating-point-st 16
533 :default-printer '(:name))
534 (prefix :field (byte 8 0) :value #b11011111)
535 (suffix :field (byte 3 13) :value #b111)
536 (op :field (byte 5 8)))
538 (sb!disassem:define-instruction-format (string-op 8
540 :default-printer '(:name width)))
542 (sb!disassem:define-instruction-format (short-cond-jump 16)
543 (op :field (byte 4 4))
544 (cc :field (byte 4 0) :type 'condition-code)
545 (label :field (byte 8 8) :type 'displacement))
547 (sb!disassem:define-instruction-format (short-jump 16
548 :default-printer '(:name :tab label))
549 (const :field (byte 4 4) :value #b1110)
550 (op :field (byte 4 0))
551 (label :field (byte 8 8) :type 'displacement))
553 (sb!disassem:define-instruction-format (near-cond-jump 16)
554 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
555 (cc :field (byte 4 8) :type 'condition-code)
556 ;; The disassembler currently doesn't let you have an instruction > 32 bits
557 ;; long, so we fake it by using a prefilter to read the offset.
558 (label :type 'displacement
559 :prefilter #'(lambda (value dstate)
560 (declare (ignore value)) ; always nil anyway
561 (sb!disassem:read-signed-suffix 32 dstate))))
563 (sb!disassem:define-instruction-format (near-jump 8
564 :default-printer '(:name :tab label))
565 (op :field (byte 8 0))
566 ;; The disassembler currently doesn't let you have an instruction > 32 bits
567 ;; long, so we fake it by using a prefilter to read the address.
568 (label :type 'displacement
569 :prefilter #'(lambda (value dstate)
570 (declare (ignore value)) ; always nil anyway
571 (sb!disassem:read-signed-suffix 32 dstate))))
574 (sb!disassem:define-instruction-format (cond-set 24
575 :default-printer '('set cc :tab reg/mem))
576 (prefix :field (byte 8 0) :value #b00001111)
577 (op :field (byte 4 12) :value #b1001)
578 (cc :field (byte 4 8) :type 'condition-code)
579 (reg/mem :fields (list (byte 2 22) (byte 3 16))
581 (reg :field (byte 3 19) :value #b000))
583 (sb!disassem:define-instruction-format (enter-format 32
584 :default-printer '(:name
586 (:unless (:constant 0)
588 (op :field (byte 8 0))
589 (disp :field (byte 16 8))
590 (level :field (byte 8 24)))
592 ;;; Single byte instruction with an immediate byte argument.
593 (sb!disassem:define-instruction-format (byte-imm 16
594 :default-printer '(:name :tab code))
595 (op :field (byte 8 0))
596 (code :field (byte 8 8)))
598 ;;;; primitive emitters
600 (define-bitfield-emitter emit-word 16
603 (define-bitfield-emitter emit-dword 32
606 (define-bitfield-emitter emit-byte-with-reg 8
607 (byte 5 3) (byte 3 0))
609 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
610 (byte 2 6) (byte 3 3) (byte 3 0))
612 (define-bitfield-emitter emit-sib-byte 8
613 (byte 2 6) (byte 3 3) (byte 3 0))
617 (defun emit-absolute-fixup (segment fixup)
618 (note-fixup segment :absolute fixup)
619 (let ((offset (fixup-offset fixup)))
621 (emit-back-patch segment
622 4 ; FIXME: sb!vm:word-bytes
623 #'(lambda (segment posn)
624 (declare (ignore posn))
626 (- (+ (component-header-length)
627 (or (label-position offset)
629 other-pointer-type))))
630 (emit-dword segment (or offset 0)))))
632 (defun emit-relative-fixup (segment fixup)
633 (note-fixup segment :relative fixup)
634 (emit-dword segment (or (fixup-offset fixup) 0)))
636 ;;;; the effective-address (ea) structure
638 (defun reg-tn-encoding (tn)
639 (declare (type tn tn))
640 (aver (eq (sb-name (sc-sb (tn-sc tn))) 'registers))
641 (let ((offset (tn-offset tn)))
642 (logior (ash (logand offset 1) 2)
645 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
647 (size nil :type (member :byte :word :dword))
648 (base nil :type (or tn null))
649 (index nil :type (or tn null))
650 (scale 1 :type (member 1 2 4 8))
651 (disp 0 :type (or (signed-byte 32) fixup)))
652 (def!method print-object ((ea ea) stream)
653 (cond ((or *print-escape* *print-readably*)
654 (print-unreadable-object (ea stream :type t)
656 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
660 (let ((scale (ea-scale ea)))
661 (if (= scale 1) nil scale))
664 (format stream "~A PTR [" (symbol-name (ea-size ea)))
666 (write-string (sb!c::location-print-name (ea-base ea)) stream)
668 (write-string "+" stream)))
670 (write-string (sb!c::location-print-name (ea-index ea)) stream))
671 (unless (= (ea-scale ea) 1)
672 (format stream "*~A" (ea-scale ea)))
673 (typecase (ea-disp ea)
676 (format stream "~@D" (ea-disp ea)))
678 (format stream "+~A" (ea-disp ea))))
679 (write-char #\] stream))))
681 (defun emit-ea (segment thing reg &optional allow-constants)
684 (ecase (sb-name (sc-sb (tn-sc thing)))
686 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
688 ;; Convert stack tns into an index off of EBP.
689 (let ((disp (- (* (1+ (tn-offset thing)) word-bytes))))
690 (cond ((< -128 disp 127)
691 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
692 (emit-byte segment disp))
694 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
695 (emit-dword segment disp)))))
697 (unless allow-constants
699 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
700 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
701 (emit-absolute-fixup segment
704 (- (* (tn-offset thing) word-bytes)
705 other-pointer-type))))))
707 (let* ((base (ea-base thing))
708 (index (ea-index thing))
709 (scale (ea-scale thing))
710 (disp (ea-disp thing))
711 (mod (cond ((or (null base)
713 (not (= (reg-tn-encoding base) #b101))))
715 ((and (fixnump disp) (<= -128 disp 127))
719 (r/m (cond (index #b100)
721 (t (reg-tn-encoding base)))))
722 (emit-mod-reg-r/m-byte segment mod reg r/m)
724 (let ((ss (1- (integer-length scale)))
725 (index (if (null index)
727 (let ((index (reg-tn-encoding index)))
729 (error "can't index off of ESP")
731 (base (if (null base)
733 (reg-tn-encoding base))))
734 (emit-sib-byte segment ss index base)))
736 (emit-byte segment disp))
737 ((or (= mod #b10) (null base))
739 (emit-absolute-fixup segment disp)
740 (emit-dword segment disp))))))
742 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
743 (emit-absolute-fixup segment thing))))
745 (defun fp-reg-tn-p (thing)
747 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
749 ;;; like the above, but for fp-instructions--jrd
750 (defun emit-fp-op (segment thing op)
751 (if (fp-reg-tn-p thing)
752 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
755 (emit-ea segment thing op)))
757 (defun byte-reg-p (thing)
759 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
760 (member (sc-name (tn-sc thing)) *byte-sc-names*)
763 (defun byte-ea-p (thing)
765 (ea (eq (ea-size thing) :byte))
767 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
770 (defun word-reg-p (thing)
772 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
773 (member (sc-name (tn-sc thing)) *word-sc-names*)
776 (defun word-ea-p (thing)
778 (ea (eq (ea-size thing) :word))
779 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
782 (defun dword-reg-p (thing)
784 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
785 (member (sc-name (tn-sc thing)) *dword-sc-names*)
788 (defun dword-ea-p (thing)
790 (ea (eq (ea-size thing) :dword))
792 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
795 (defun register-p (thing)
797 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
799 (defun accumulator-p (thing)
800 (and (register-p thing)
801 (= (tn-offset thing) 0)))
805 (defconstant +operand-size-prefix-byte+ #b01100110)
807 (defconstant +default-operand-size+ :dword)
809 (defun maybe-emit-operand-size-prefix (segment size)
810 (unless (or (eq size :byte) (eq size +default-operand-size+))
811 (emit-byte segment +operand-size-prefix-byte+)))
813 (defun operand-size (thing)
816 ;; FIXME: might as well be COND instead of having to use #. readmacro
817 ;; to hack up the code
818 (case (sc-name (tn-sc thing))
825 ;; added by jrd: float-registers is a separate size (?)
831 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
837 (defun matching-operand-size (dst src)
838 (let ((dst-size (operand-size dst))
839 (src-size (operand-size src)))
842 (if (eq dst-size src-size)
844 (error "size mismatch: ~S is a ~S and ~S is a ~S."
845 dst dst-size src src-size))
849 (error "can't tell the size of either ~S or ~S" dst src)))))
851 (defun emit-sized-immediate (segment size value)
854 (emit-byte segment value))
856 (emit-word segment value))
858 (emit-dword segment value))))
860 ;;;; general data transfer
862 (define-instruction mov (segment dst src)
863 ;; immediate to register
864 (:printer reg ((op #b1011) (imm nil :type 'imm-data))
865 '(:name :tab reg ", " imm))
866 ;; absolute mem to/from accumulator
867 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
868 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
869 ;; register to/from register/memory
870 (:printer reg-reg/mem-dir ((op #b100010)))
871 ;; immediate to register/memory
872 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
875 (let ((size (matching-operand-size dst src)))
876 (maybe-emit-operand-size-prefix segment size)
877 (cond ((register-p dst)
878 (cond ((integerp src)
879 (emit-byte-with-reg segment
883 (reg-tn-encoding dst))
884 (emit-sized-immediate segment size src))
885 ((and (fixup-p src) (accumulator-p dst))
890 (emit-absolute-fixup segment src))
896 (emit-ea segment src (reg-tn-encoding dst) t))))
897 ((and (fixup-p dst) (accumulator-p src))
898 (emit-byte segment (if (eq size :byte) #b10100010 #b10100011))
899 (emit-absolute-fixup segment dst))
901 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
902 (emit-ea segment dst #b000)
903 (emit-sized-immediate segment size src))
905 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
906 (emit-ea segment dst (reg-tn-encoding src)))
908 (aver (eq size :dword))
909 (emit-byte segment #b11000111)
910 (emit-ea segment dst #b000)
911 (emit-absolute-fixup segment src))
913 (error "bogus arguments to MOV: ~S ~S" dst src))))))
915 (defun emit-move-with-extension (segment dst src opcode)
916 (aver (register-p dst))
917 (let ((dst-size (operand-size dst))
918 (src-size (operand-size src)))
921 (aver (eq src-size :byte))
922 (maybe-emit-operand-size-prefix segment :word)
923 (emit-byte segment #b00001111)
924 (emit-byte segment opcode)
925 (emit-ea segment src (reg-tn-encoding dst)))
929 (maybe-emit-operand-size-prefix segment :dword)
930 (emit-byte segment #b00001111)
931 (emit-byte segment opcode)
932 (emit-ea segment src (reg-tn-encoding dst)))
934 (emit-byte segment #b00001111)
935 (emit-byte segment (logior opcode 1))
936 (emit-ea segment src (reg-tn-encoding dst))))))))
938 (define-instruction movsx (segment dst src)
939 (:printer ext-reg-reg/mem ((op #b1011111) (reg nil :type 'word-reg)))
940 (:emitter (emit-move-with-extension segment dst src #b10111110)))
942 (define-instruction movzx (segment dst src)
943 (:printer ext-reg-reg/mem ((op #b1011011) (reg nil :type 'word-reg)))
944 (:emitter (emit-move-with-extension segment dst src #b10110110)))
946 (define-instruction push (segment src)
948 (:printer reg-no-width ((op #b01010)))
950 (:printer reg/mem ((op '(#b1111111 #b110)) (width 1)))
952 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
954 (:printer byte ((op #b01101000) (imm nil :type 'imm-word))
956 ;; ### segment registers?
959 (cond ((integerp src)
960 (cond ((<= -128 src 127)
961 (emit-byte segment #b01101010)
962 (emit-byte segment src))
964 (emit-byte segment #b01101000)
965 (emit-dword segment src))))
967 ;; Interpret the fixup as an immediate dword to push.
968 (emit-byte segment #b01101000)
969 (emit-absolute-fixup segment src))
971 (let ((size (operand-size src)))
972 (aver (not (eq size :byte)))
973 (maybe-emit-operand-size-prefix segment size)
974 (cond ((register-p src)
975 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
977 (emit-byte segment #b11111111)
978 (emit-ea segment src #b110 t))))))))
980 (define-instruction pusha (segment)
981 (:printer byte ((op #b01100000)))
983 (emit-byte segment #b01100000)))
985 (define-instruction pop (segment dst)
986 (:printer reg-no-width ((op #b01011)))
987 (:printer reg/mem ((op '(#b1000111 #b000)) (width 1)))
989 (let ((size (operand-size dst)))
990 (aver (not (eq size :byte)))
991 (maybe-emit-operand-size-prefix segment size)
992 (cond ((register-p dst)
993 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
995 (emit-byte segment #b10001111)
996 (emit-ea segment dst #b000))))))
998 (define-instruction popa (segment)
999 (:printer byte ((op #b01100001)))
1001 (emit-byte segment #b01100001)))
1003 (define-instruction xchg (segment operand1 operand2)
1004 ;; Register with accumulator.
1005 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1006 ;; Register/Memory with Register.
1007 (:printer reg-reg/mem ((op #b1000011)))
1009 (let ((size (matching-operand-size operand1 operand2)))
1010 (maybe-emit-operand-size-prefix segment size)
1011 (labels ((xchg-acc-with-something (acc something)
1012 (if (and (not (eq size :byte)) (register-p something))
1013 (emit-byte-with-reg segment
1015 (reg-tn-encoding something))
1016 (xchg-reg-with-something acc something)))
1017 (xchg-reg-with-something (reg something)
1018 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1019 (emit-ea segment something (reg-tn-encoding reg))))
1020 (cond ((accumulator-p operand1)
1021 (xchg-acc-with-something operand1 operand2))
1022 ((accumulator-p operand2)
1023 (xchg-acc-with-something operand2 operand1))
1024 ((register-p operand1)
1025 (xchg-reg-with-something operand1 operand2))
1026 ((register-p operand2)
1027 (xchg-reg-with-something operand2 operand1))
1029 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1031 (define-instruction lea (segment dst src)
1032 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1034 (aver (dword-reg-p dst))
1035 (emit-byte segment #b10001101)
1036 (emit-ea segment src (reg-tn-encoding dst))))
1038 (define-instruction cmpxchg (segment dst src)
1039 ;; Register/Memory with Register.
1040 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1042 (aver (register-p src))
1043 (let ((size (matching-operand-size src dst)))
1044 (maybe-emit-operand-size-prefix segment size)
1045 (emit-byte segment #b00001111)
1046 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1047 (emit-ea segment dst (reg-tn-encoding src)))))
1050 ;;;; flag control instructions
1052 ;;; CLC -- Clear Carry Flag.
1053 (define-instruction clc (segment)
1054 (:printer byte ((op #b11111000)))
1056 (emit-byte segment #b11111000)))
1058 ;;; CLD -- Clear Direction Flag.
1059 (define-instruction cld (segment)
1060 (:printer byte ((op #b11111100)))
1062 (emit-byte segment #b11111100)))
1064 ;;; CLI -- Clear Iterrupt Enable Flag.
1065 (define-instruction cli (segment)
1066 (:printer byte ((op #b11111010)))
1068 (emit-byte segment #b11111010)))
1070 ;;; CMC -- Complement Carry Flag.
1071 (define-instruction cmc (segment)
1072 (:printer byte ((op #b11110101)))
1074 (emit-byte segment #b11110101)))
1076 ;;; LAHF -- Load AH into flags.
1077 (define-instruction lahf (segment)
1078 (:printer byte ((op #b10011111)))
1080 (emit-byte segment #b10011111)))
1082 ;;; POPF -- Pop flags.
1083 (define-instruction popf (segment)
1084 (:printer byte ((op #b10011101)))
1086 (emit-byte segment #b10011101)))
1088 ;;; PUSHF -- push flags.
1089 (define-instruction pushf (segment)
1090 (:printer byte ((op #b10011100)))
1092 (emit-byte segment #b10011100)))
1094 ;;; SAHF -- Store AH into flags.
1095 (define-instruction sahf (segment)
1096 (:printer byte ((op #b10011110)))
1098 (emit-byte segment #b10011110)))
1100 ;;; STC -- Set Carry Flag.
1101 (define-instruction stc (segment)
1102 (:printer byte ((op #b11111001)))
1104 (emit-byte segment #b11111001)))
1106 ;;; STD -- Set Direction Flag.
1107 (define-instruction std (segment)
1108 (:printer byte ((op #b11111101)))
1110 (emit-byte segment #b11111101)))
1112 ;;; STI -- Set Interrupt Enable Flag.
1113 (define-instruction sti (segment)
1114 (:printer byte ((op #b11111011)))
1116 (emit-byte segment #b11111011)))
1120 (defun emit-random-arith-inst (name segment dst src opcode
1121 &optional allow-constants)
1122 (let ((size (matching-operand-size dst src)))
1123 (maybe-emit-operand-size-prefix segment size)
1126 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1127 (emit-byte segment #b10000011)
1128 (emit-ea segment dst opcode)
1129 (emit-byte segment src))
1130 ((accumulator-p dst)
1137 (emit-sized-immediate segment size src))
1139 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1140 (emit-ea segment dst opcode)
1141 (emit-sized-immediate segment size src))))
1146 (if (eq size :byte) #b00000000 #b00000001)))
1147 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1152 (if (eq size :byte) #b00000010 #b00000011)))
1153 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1155 (error "bogus operands to ~A" name)))))
1157 (eval-when (:compile-toplevel :execute)
1158 (defun arith-inst-printer-list (subop)
1159 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1160 (reg/mem-imm ((op (#b1000000 ,subop))))
1161 (reg/mem-imm ((op (#b1000001 ,subop))
1162 (imm nil :type signed-imm-byte)))
1163 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1166 (define-instruction add (segment dst src)
1167 (:printer-list (arith-inst-printer-list #b000))
1168 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1170 (define-instruction adc (segment dst src)
1171 (:printer-list (arith-inst-printer-list #b010))
1172 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1174 (define-instruction sub (segment dst src)
1175 (:printer-list (arith-inst-printer-list #b101))
1176 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1178 (define-instruction sbb (segment dst src)
1179 (:printer-list (arith-inst-printer-list #b011))
1180 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1182 (define-instruction cmp (segment dst src)
1183 (:printer-list (arith-inst-printer-list #b111))
1184 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1186 (define-instruction inc (segment dst)
1188 (:printer reg-no-width ((op #b01000)))
1190 (:printer reg/mem ((op '(#b1111111 #b000))))
1192 (let ((size (operand-size dst)))
1193 (maybe-emit-operand-size-prefix segment size)
1194 (cond ((and (not (eq size :byte)) (register-p dst))
1195 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1197 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1198 (emit-ea segment dst #b000))))))
1200 (define-instruction dec (segment dst)
1202 (:printer reg-no-width ((op #b01001)))
1204 (:printer reg/mem ((op '(#b1111111 #b001))))
1206 (let ((size (operand-size dst)))
1207 (maybe-emit-operand-size-prefix segment size)
1208 (cond ((and (not (eq size :byte)) (register-p dst))
1209 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1211 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1212 (emit-ea segment dst #b001))))))
1214 (define-instruction neg (segment dst)
1215 (:printer reg/mem ((op '(#b1111011 #b011))))
1217 (let ((size (operand-size dst)))
1218 (maybe-emit-operand-size-prefix segment size)
1219 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1220 (emit-ea segment dst #b011))))
1222 (define-instruction aaa (segment)
1223 (:printer byte ((op #b00110111)))
1225 (emit-byte segment #b00110111)))
1227 (define-instruction aas (segment)
1228 (:printer byte ((op #b00111111)))
1230 (emit-byte segment #b00111111)))
1232 (define-instruction daa (segment)
1233 (:printer byte ((op #b00100111)))
1235 (emit-byte segment #b00100111)))
1237 (define-instruction das (segment)
1238 (:printer byte ((op #b00101111)))
1240 (emit-byte segment #b00101111)))
1242 (define-instruction mul (segment dst src)
1243 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1245 (let ((size (matching-operand-size dst src)))
1246 (aver (accumulator-p dst))
1247 (maybe-emit-operand-size-prefix segment size)
1248 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1249 (emit-ea segment src #b100))))
1251 (define-instruction imul (segment dst &optional src1 src2)
1252 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1253 (:printer ext-reg-reg/mem ((op #b1010111)))
1254 (:printer reg-reg/mem ((op #b0110100) (width 1) (imm nil :type 'imm-word))
1255 '(:name :tab reg ", " reg/mem ", " imm))
1256 (:printer reg-reg/mem ((op #b0110101) (width 1)
1257 (imm nil :type 'signed-imm-byte))
1258 '(:name :tab reg ", " reg/mem ", " imm))
1260 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1261 (let* ((size (matching-operand-size reg r/m))
1262 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1263 (maybe-emit-operand-size-prefix segment size)
1264 (emit-byte segment (if sx #b01101011 #b01101001))
1265 (emit-ea segment r/m (reg-tn-encoding reg))
1267 (emit-byte segment immed)
1268 (emit-sized-immediate segment size immed)))))
1270 (r/m-with-immed-to-reg dst src1 src2))
1273 (r/m-with-immed-to-reg dst dst src1)
1274 (let ((size (matching-operand-size dst src1)))
1275 (maybe-emit-operand-size-prefix segment size)
1276 (emit-byte segment #b00001111)
1277 (emit-byte segment #b10101111)
1278 (emit-ea segment src1 (reg-tn-encoding dst)))))
1280 (let ((size (operand-size dst)))
1281 (maybe-emit-operand-size-prefix segment size)
1282 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1283 (emit-ea segment dst #b101)))))))
1285 (define-instruction div (segment dst src)
1286 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1288 (let ((size (matching-operand-size dst src)))
1289 (aver (accumulator-p dst))
1290 (maybe-emit-operand-size-prefix segment size)
1291 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1292 (emit-ea segment src #b110))))
1294 (define-instruction idiv (segment dst src)
1295 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1297 (let ((size (matching-operand-size dst src)))
1298 (aver (accumulator-p dst))
1299 (maybe-emit-operand-size-prefix segment size)
1300 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1301 (emit-ea segment src #b111))))
1303 (define-instruction aad (segment)
1304 (:printer two-bytes ((op '(#b11010101 #b00001010))))
1306 (emit-byte segment #b11010101)
1307 (emit-byte segment #b00001010)))
1309 (define-instruction aam (segment)
1310 (:printer two-bytes ((op '(#b11010100 #b00001010))))
1312 (emit-byte segment #b11010100)
1313 (emit-byte segment #b00001010)))
1315 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1316 (define-instruction cbw (segment)
1318 (maybe-emit-operand-size-prefix segment :word)
1319 (emit-byte segment #b10011000)))
1321 ;;; CWDE -- Convert Word To Double Word Extened. EAX <- sign_xtnd(AX)
1322 (define-instruction cwde (segment)
1324 (maybe-emit-operand-size-prefix segment :dword)
1325 (emit-byte segment #b10011000)))
1327 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1328 (define-instruction cwd (segment)
1330 (maybe-emit-operand-size-prefix segment :word)
1331 (emit-byte segment #b10011001)))
1333 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1334 (define-instruction cdq (segment)
1335 (:printer byte ((op #b10011001)))
1337 (maybe-emit-operand-size-prefix segment :dword)
1338 (emit-byte segment #b10011001)))
1340 (define-instruction xadd (segment dst src)
1341 ;; Register/Memory with Register.
1342 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1344 (aver (register-p src))
1345 (let ((size (matching-operand-size src dst)))
1346 (maybe-emit-operand-size-prefix segment size)
1347 (emit-byte segment #b00001111)
1348 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1349 (emit-ea segment dst (reg-tn-encoding src)))))
1354 (defun emit-shift-inst (segment dst amount opcode)
1355 (let ((size (operand-size dst)))
1356 (maybe-emit-operand-size-prefix segment size)
1357 (multiple-value-bind (major-opcode immed)
1359 (:cl (values #b11010010 nil))
1360 (1 (values #b11010000 nil))
1361 (t (values #b11000000 t)))
1363 (if (eq size :byte) major-opcode (logior major-opcode 1)))
1364 (emit-ea segment dst opcode)
1366 (emit-byte segment amount)))))
1368 (eval-when (:compile-toplevel :execute)
1369 (defun shift-inst-printer-list (subop)
1370 `((reg/mem ((op (#b1101000 ,subop)))
1371 (:name :tab reg/mem ", 1"))
1372 (reg/mem ((op (#b1101001 ,subop)))
1373 (:name :tab reg/mem ", " 'cl))
1374 (reg/mem-imm ((op (#b1100000 ,subop))
1375 (imm nil :type signed-imm-byte))))))
1377 (define-instruction rol (segment dst amount)
1379 (shift-inst-printer-list #b000))
1381 (emit-shift-inst segment dst amount #b000)))
1383 (define-instruction ror (segment dst amount)
1385 (shift-inst-printer-list #b001))
1387 (emit-shift-inst segment dst amount #b001)))
1389 (define-instruction rcl (segment dst amount)
1391 (shift-inst-printer-list #b010))
1393 (emit-shift-inst segment dst amount #b010)))
1395 (define-instruction rcr (segment dst amount)
1397 (shift-inst-printer-list #b011))
1399 (emit-shift-inst segment dst amount #b011)))
1401 (define-instruction shl (segment dst amount)
1403 (shift-inst-printer-list #b100))
1405 (emit-shift-inst segment dst amount #b100)))
1407 (define-instruction shr (segment dst amount)
1409 (shift-inst-printer-list #b101))
1411 (emit-shift-inst segment dst amount #b101)))
1413 (define-instruction sar (segment dst amount)
1415 (shift-inst-printer-list #b111))
1417 (emit-shift-inst segment dst amount #b111)))
1419 (defun emit-double-shift (segment opcode dst src amt)
1420 (let ((size (matching-operand-size dst src)))
1421 (when (eq size :byte)
1422 (error "Double shifts can only be used with words."))
1423 (maybe-emit-operand-size-prefix segment size)
1424 (emit-byte segment #b00001111)
1425 (emit-byte segment (dpb opcode (byte 1 3)
1426 (if (eq amt :cl) #b10100101 #b10100100)))
1428 (emit-ea segment dst src)
1429 (emit-ea segment dst (reg-tn-encoding src)) ; pw tries this
1430 (unless (eq amt :cl)
1431 (emit-byte segment amt))))
1433 (eval-when (:compile-toplevel :execute)
1434 (defun double-shift-inst-printer-list (op)
1436 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
1437 (imm nil :type signed-imm-byte)))
1438 (ext-reg-reg/mem ((op ,(logior op #b101)))
1439 (:name :tab reg/mem ", " 'cl)))))
1441 (define-instruction shld (segment dst src amt)
1442 (:declare (type (or (member :cl) (mod 32)) amt))
1443 (:printer-list (double-shift-inst-printer-list #b10100000))
1445 (emit-double-shift segment #b0 dst src amt)))
1447 (define-instruction shrd (segment dst src amt)
1448 (:declare (type (or (member :cl) (mod 32)) amt))
1449 (:printer-list (double-shift-inst-printer-list #b10101000))
1451 (emit-double-shift segment #b1 dst src amt)))
1453 (define-instruction and (segment dst src)
1455 (arith-inst-printer-list #b100))
1457 (emit-random-arith-inst "AND" segment dst src #b100)))
1459 (define-instruction test (segment this that)
1460 (:printer accum-imm ((op #b1010100)))
1461 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
1462 (:printer reg-reg/mem ((op #b1000010)))
1464 (let ((size (matching-operand-size this that)))
1465 (maybe-emit-operand-size-prefix segment size)
1466 (flet ((test-immed-and-something (immed something)
1467 (cond ((accumulator-p something)
1469 (if (eq size :byte) #b10101000 #b10101001))
1470 (emit-sized-immediate segment size immed))
1473 (if (eq size :byte) #b11110110 #b11110111))
1474 (emit-ea segment something #b000)
1475 (emit-sized-immediate segment size immed))))
1476 (test-reg-and-something (reg something)
1477 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
1478 (emit-ea segment something (reg-tn-encoding reg))))
1479 (cond ((integerp that)
1480 (test-immed-and-something that this))
1482 (test-immed-and-something this that))
1484 (test-reg-and-something this that))
1486 (test-reg-and-something that this))
1488 (error "bogus operands for TEST: ~S and ~S" this that)))))))
1490 (define-instruction or (segment dst src)
1492 (arith-inst-printer-list #b001))
1494 (emit-random-arith-inst "OR" segment dst src #b001)))
1496 (define-instruction xor (segment dst src)
1498 (arith-inst-printer-list #b110))
1500 (emit-random-arith-inst "XOR" segment dst src #b110)))
1502 (define-instruction not (segment dst)
1503 (:printer reg/mem ((op '(#b1111011 #b010))))
1505 (let ((size (operand-size dst)))
1506 (maybe-emit-operand-size-prefix segment size)
1507 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1508 (emit-ea segment dst #b010))))
1510 ;;;; string manipulation
1512 (define-instruction cmps (segment size)
1513 (:printer string-op ((op #b1010011)))
1515 (maybe-emit-operand-size-prefix segment size)
1516 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
1518 (define-instruction ins (segment acc)
1519 (:printer string-op ((op #b0110110)))
1521 (let ((size (operand-size acc)))
1522 (aver (accumulator-p acc))
1523 (maybe-emit-operand-size-prefix segment size)
1524 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
1526 (define-instruction lods (segment acc)
1527 (:printer string-op ((op #b1010110)))
1529 (let ((size (operand-size acc)))
1530 (aver (accumulator-p acc))
1531 (maybe-emit-operand-size-prefix segment size)
1532 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
1534 (define-instruction movs (segment size)
1535 (:printer string-op ((op #b1010010)))
1537 (maybe-emit-operand-size-prefix segment size)
1538 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
1540 (define-instruction outs (segment acc)
1541 (:printer string-op ((op #b0110111)))
1543 (let ((size (operand-size acc)))
1544 (aver (accumulator-p acc))
1545 (maybe-emit-operand-size-prefix segment size)
1546 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
1548 (define-instruction scas (segment acc)
1549 (:printer string-op ((op #b1010111)))
1551 (let ((size (operand-size acc)))
1552 (aver (accumulator-p acc))
1553 (maybe-emit-operand-size-prefix segment size)
1554 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
1556 (define-instruction stos (segment acc)
1557 (:printer string-op ((op #b1010101)))
1559 (let ((size (operand-size acc)))
1560 (aver (accumulator-p acc))
1561 (maybe-emit-operand-size-prefix segment size)
1562 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
1564 (define-instruction xlat (segment)
1565 (:printer byte ((op #b11010111)))
1567 (emit-byte segment #b11010111)))
1569 (define-instruction rep (segment)
1571 (emit-byte segment #b11110010)))
1573 (define-instruction repe (segment)
1574 (:printer byte ((op #b11110011)))
1576 (emit-byte segment #b11110011)))
1578 (define-instruction repne (segment)
1579 (:printer byte ((op #b11110010)))
1581 (emit-byte segment #b11110010)))
1584 ;;;; bit manipulation
1586 (define-instruction bsf (segment dst src)
1588 (let ((size (matching-operand-size dst src)))
1589 (when (eq size :byte)
1590 (error "can't scan bytes: ~S" src))
1591 (maybe-emit-operand-size-prefix segment size)
1592 (emit-byte segment #b00001111)
1593 (emit-byte segment #b10111100)
1594 (emit-ea segment src (reg-tn-encoding dst)))))
1596 (define-instruction bsr (segment dst src)
1598 (let ((size (matching-operand-size dst src)))
1599 (when (eq size :byte)
1600 (error "can't scan bytes: ~S" src))
1601 (maybe-emit-operand-size-prefix segment size)
1602 (emit-byte segment #b00001111)
1603 (emit-byte segment #b10111101)
1604 (emit-ea segment src (reg-tn-encoding dst)))))
1606 (defun emit-bit-test-and-mumble (segment src index opcode)
1607 (let ((size (operand-size src)))
1608 (when (eq size :byte)
1609 (error "can't scan bytes: ~S" src))
1610 (maybe-emit-operand-size-prefix segment size)
1611 (emit-byte segment #b00001111)
1612 (cond ((integerp index)
1613 (emit-byte segment #b10111010)
1614 (emit-ea segment src opcode)
1615 (emit-byte segment index))
1617 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
1618 (emit-ea segment src (reg-tn-encoding index))))))
1620 (define-instruction bt (segment src index)
1622 (emit-bit-test-and-mumble segment src index #b100)))
1624 (define-instruction btc (segment src index)
1626 (emit-bit-test-and-mumble segment src index #b111)))
1628 (define-instruction btr (segment src index)
1630 (emit-bit-test-and-mumble segment src index #b110)))
1632 (define-instruction bts (segment src index)
1634 (emit-bit-test-and-mumble segment src index #b101)))
1637 ;;;; control transfer
1639 (define-instruction call (segment where)
1640 (:printer near-jump ((op #b11101000)))
1641 (:printer reg/mem ((op '(#b1111111 #b010)) (width 1)))
1645 (emit-byte segment #b11101000)
1646 (emit-back-patch segment
1648 #'(lambda (segment posn)
1650 (- (label-position where)
1653 (emit-byte segment #b11101000)
1654 (emit-relative-fixup segment where))
1656 (emit-byte segment #b11111111)
1657 (emit-ea segment where #b010)))))
1659 (defun emit-byte-displacement-backpatch (segment target)
1660 (emit-back-patch segment
1662 #'(lambda (segment posn)
1663 (let ((disp (- (label-position target) (1+ posn))))
1664 (aver (<= -128 disp 127))
1665 (emit-byte segment disp)))))
1667 (define-instruction jmp (segment cond &optional where)
1668 ;; conditional jumps
1669 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
1670 (:printer near-cond-jump () '('j cc :tab label))
1671 ;; unconditional jumps
1672 (:printer short-jump ((op #b1011)))
1673 (:printer near-jump ((op #b11101001)) )
1674 (:printer reg/mem ((op '(#b1111111 #b100)) (width 1)))
1679 #'(lambda (segment posn delta-if-after)
1680 (let ((disp (- (label-position where posn delta-if-after)
1682 (when (<= -128 disp 127)
1684 (dpb (conditional-opcode cond)
1687 (emit-byte-displacement-backpatch segment where)
1689 #'(lambda (segment posn)
1690 (let ((disp (- (label-position where) (+ posn 6))))
1691 (emit-byte segment #b00001111)
1693 (dpb (conditional-opcode cond)
1696 (emit-dword segment disp)))))
1697 ((label-p (setq where cond))
1700 #'(lambda (segment posn delta-if-after)
1701 (let ((disp (- (label-position where posn delta-if-after)
1703 (when (<= -128 disp 127)
1704 (emit-byte segment #b11101011)
1705 (emit-byte-displacement-backpatch segment where)
1707 #'(lambda (segment posn)
1708 (let ((disp (- (label-position where) (+ posn 5))))
1709 (emit-byte segment #b11101001)
1710 (emit-dword segment disp))
1713 (emit-byte segment #b11101001)
1714 (emit-relative-fixup segment where))
1716 (unless (or (ea-p where) (tn-p where))
1717 (error "don't know what to do with ~A" where))
1718 (emit-byte segment #b11111111)
1719 (emit-ea segment where #b100)))))
1721 (define-instruction jmp-short (segment label)
1723 (emit-byte segment #b11101011)
1724 (emit-byte-displacement-backpatch segment label)))
1726 (define-instruction ret (segment &optional stack-delta)
1727 (:printer byte ((op #b11000011)))
1728 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
1732 (emit-byte segment #b11000010)
1733 (emit-word segment stack-delta))
1735 (emit-byte segment #b11000011)))))
1737 (define-instruction jecxz (segment target)
1738 (:printer short-jump ((op #b0011)))
1740 (emit-byte segment #b11100011)
1741 (emit-byte-displacement-backpatch segment target)))
1743 (define-instruction loop (segment target)
1744 (:printer short-jump ((op #b0010)))
1746 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
1747 (emit-byte-displacement-backpatch segment target)))
1749 (define-instruction loopz (segment target)
1750 (:printer short-jump ((op #b0001)))
1752 (emit-byte segment #b11100001)
1753 (emit-byte-displacement-backpatch segment target)))
1755 (define-instruction loopnz (segment target)
1756 (:printer short-jump ((op #b0000)))
1758 (emit-byte segment #b11100000)
1759 (emit-byte-displacement-backpatch segment target)))
1761 ;;;; conditional byte set
1763 (define-instruction set (segment dst cond)
1764 (:printer cond-set ())
1766 (emit-byte segment #b00001111)
1767 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
1768 (emit-ea segment dst #b000)))
1772 (define-instruction enter (segment disp &optional (level 0))
1773 (:declare (type (unsigned-byte 16) disp)
1774 (type (unsigned-byte 8) level))
1775 (:printer enter-format ((op #b11001000)))
1777 (emit-byte segment #b11001000)
1778 (emit-word segment disp)
1779 (emit-byte segment level)))
1781 (define-instruction leave (segment)
1782 (:printer byte ((op #b11001001)))
1784 (emit-byte segment #b11001001)))
1786 ;;;; interrupt instructions
1788 (defun snarf-error-junk (sap offset &optional length-only)
1789 (let* ((length (sb!sys:sap-ref-8 sap offset))
1790 (vector (make-array length :element-type '(unsigned-byte 8))))
1791 (declare (type sb!sys:system-area-pointer sap)
1792 (type (unsigned-byte 8) length)
1793 (type (simple-array (unsigned-byte 8) (*)) vector))
1795 (values 0 (1+ length) nil nil))
1797 (sb!kernel:copy-from-system-area sap (* byte-bits (1+ offset))
1800 (* length byte-bits))
1801 (collect ((sc-offsets)
1803 (lengths 1) ; the length byte
1805 (error-number (sb!c::read-var-integer vector index)))
1808 (when (>= index length)
1810 (let ((old-index index))
1811 (sc-offsets (sb!c::read-var-integer vector index))
1812 (lengths (- index old-index))))
1813 (values error-number
1819 (defmacro break-cases (breaknum &body cases)
1820 (let ((bn-temp (gensym)))
1821 (collect ((clauses))
1822 (dolist (case cases)
1823 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
1824 `(let ((,bn-temp ,breaknum))
1825 (cond ,@(clauses))))))
1828 (defun break-control (chunk inst stream dstate)
1829 (declare (ignore inst))
1830 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
1831 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
1832 ;; map has it undefined; and it should be easier to look in the target
1833 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
1834 ;; from first principles whether it's defined in some way that genesis
1836 (case (byte-imm-code chunk dstate)
1839 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1840 (#.sb!vm:cerror-trap
1842 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
1843 (#.sb!vm:breakpoint-trap
1844 (nt "breakpoint trap"))
1845 (#.sb!vm:pending-interrupt-trap
1846 (nt "pending interrupt trap"))
1849 (#.sb!vm:function-end-breakpoint-trap
1850 (nt "function end breakpoint trap")))))
1852 (define-instruction break (segment code)
1853 (:declare (type (unsigned-byte 8) code))
1854 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
1855 :control #'break-control)
1857 (emit-byte segment #b11001100)
1858 (emit-byte segment code)))
1860 (define-instruction int (segment number)
1861 (:declare (type (unsigned-byte 8) number))
1862 (:printer byte-imm ((op #b11001101)))
1866 (emit-byte segment #b11001100))
1868 (emit-byte segment #b11001101)
1869 (emit-byte segment number)))))
1871 (define-instruction into (segment)
1872 (:printer byte ((op #b11001110)))
1874 (emit-byte segment #b11001110)))
1876 (define-instruction bound (segment reg bounds)
1878 (let ((size (matching-operand-size reg bounds)))
1879 (when (eq size :byte)
1880 (error "can't bounds-test bytes: ~S" reg))
1881 (maybe-emit-operand-size-prefix segment size)
1882 (emit-byte segment #b01100010)
1883 (emit-ea segment bounds (reg-tn-encoding reg)))))
1885 (define-instruction iret (segment)
1886 (:printer byte ((op #b11001111)))
1888 (emit-byte segment #b11001111)))
1890 ;;;; processor control
1892 (define-instruction hlt (segment)
1893 (:printer byte ((op #b11110100)))
1895 (emit-byte segment #b11110100)))
1897 (define-instruction nop (segment)
1898 (:printer byte ((op #b10010000)))
1900 (emit-byte segment #b10010000)))
1902 (define-instruction wait (segment)
1903 (:printer byte ((op #b10011011)))
1905 (emit-byte segment #b10011011)))
1907 (define-instruction lock (segment)
1908 (:printer byte ((op #b11110000)))
1910 (emit-byte segment #b11110000)))
1912 ;;;; miscellaneous hackery
1914 (define-instruction byte (segment byte)
1916 (emit-byte segment byte)))
1918 (define-instruction word (segment word)
1920 (emit-word segment word)))
1922 (define-instruction dword (segment dword)
1924 (emit-dword segment dword)))
1926 (defun emit-header-data (segment type)
1927 (emit-back-patch segment
1929 (lambda (segment posn)
1933 (component-header-length))
1937 (define-instruction function-header-word (segment)
1939 (emit-header-data segment function-header-type)))
1941 (define-instruction lra-header-word (segment)
1943 (emit-header-data segment return-pc-header-type)))
1945 ;;;; fp instructions
1947 ;;;; FIXME: This section said "added by jrd", which should end up in CREDITS.
1949 ;;;; Note: We treat the single-precision and double-precision variants
1950 ;;;; as separate instructions.
1952 ;;; Load single to st(0).
1953 (define-instruction fld (segment source)
1954 (:printer floating-point ((op '(#b001 #b000))))
1956 (emit-byte segment #b11011001)
1957 (emit-fp-op segment source #b000)))
1959 ;;; Load double to st(0).
1960 (define-instruction fldd (segment source)
1961 (:printer floating-point ((op '(#b101 #b000))))
1962 (:printer floating-point-fp ((op '(#b001 #b000))))
1964 (if (fp-reg-tn-p source)
1965 (emit-byte segment #b11011001)
1966 (emit-byte segment #b11011101))
1967 (emit-fp-op segment source #b000)))
1969 ;;; Load long to st(0).
1970 (define-instruction fldl (segment source)
1971 (:printer floating-point ((op '(#b011 #b101))))
1973 (emit-byte segment #b11011011)
1974 (emit-fp-op segment source #b101)))
1976 ;;; Store single from st(0).
1977 (define-instruction fst (segment dest)
1978 (:printer floating-point ((op '(#b001 #b010))))
1980 (cond ((fp-reg-tn-p dest)
1981 (emit-byte segment #b11011101)
1982 (emit-fp-op segment dest #b010))
1984 (emit-byte segment #b11011001)
1985 (emit-fp-op segment dest #b010)))))
1987 ;;; Store double from st(0).
1988 (define-instruction fstd (segment dest)
1989 (:printer floating-point ((op '(#b101 #b010))))
1990 (:printer floating-point-fp ((op '(#b101 #b010))))
1992 (cond ((fp-reg-tn-p dest)
1993 (emit-byte segment #b11011101)
1994 (emit-fp-op segment dest #b010))
1996 (emit-byte segment #b11011101)
1997 (emit-fp-op segment dest #b010)))))
1999 ;;; Arithmetic ops are all done with at least one operand at top of
2000 ;;; stack. The other operand is is another register or a 32/64 bit
2003 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2004 ;;; that these conflict with the Gdb conventions for binops. To reduce
2005 ;;; the confusion I've added comments showing the mathamatical
2006 ;;; operation and the two syntaxes. By the ASM386 convention the
2007 ;;; instruction syntax is:
2010 ;;; or Fop Destination, Source
2012 ;;; If only one operand is given then it is the source and the
2013 ;;; destination is ST(0). There are reversed forms of the fsub and
2014 ;;; fdiv instructions inducated by an 'R' suffix.
2016 ;;; The mathematical operation for the non-reverse form is always:
2017 ;;; destination = destination op source
2019 ;;; For the reversed form it is:
2020 ;;; destination = source op destination
2022 ;;; The instructions below only accept one operand at present which is
2023 ;;; usually the source. I've hack in extra instructions to implement
2024 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2025 ;;; the operand is the destination with the source being ST(0).
2028 ;;; st(0) = st(0) + memory or st(i).
2029 (define-instruction fadd (segment source)
2030 (:printer floating-point ((op '(#b000 #b000))))
2032 (emit-byte segment #b11011000)
2033 (emit-fp-op segment source #b000)))
2036 ;;; st(0) = st(0) + memory or st(i).
2037 (define-instruction faddd (segment source)
2038 (:printer floating-point ((op '(#b100 #b000))))
2039 (:printer floating-point-fp ((op '(#b000 #b000))))
2041 (if (fp-reg-tn-p source)
2042 (emit-byte segment #b11011000)
2043 (emit-byte segment #b11011100))
2044 (emit-fp-op segment source #b000)))
2046 ;;; Add double destination st(i):
2047 ;;; st(i) = st(0) + st(i).
2048 (define-instruction fadd-sti (segment destination)
2049 (:printer floating-point-fp ((op '(#b100 #b000))))
2051 (aver (fp-reg-tn-p destination))
2052 (emit-byte segment #b11011100)
2053 (emit-fp-op segment destination #b000)))
2055 (define-instruction faddp-sti (segment destination)
2056 (:printer floating-point-fp ((op '(#b110 #b000))))
2058 (aver (fp-reg-tn-p destination))
2059 (emit-byte segment #b11011110)
2060 (emit-fp-op segment destination #b000)))
2062 ;;; Subtract single:
2063 ;;; st(0) = st(0) - memory or st(i).
2064 (define-instruction fsub (segment source)
2065 (:printer floating-point ((op '(#b000 #b100))))
2067 (emit-byte segment #b11011000)
2068 (emit-fp-op segment source #b100)))
2070 ;;; Subtract single, reverse:
2071 ;;; st(0) = memory or st(i) - st(0).
2072 (define-instruction fsubr (segment source)
2073 (:printer floating-point ((op '(#b000 #b101))))
2075 (emit-byte segment #b11011000)
2076 (emit-fp-op segment source #b101)))
2078 ;;; Subtract double:
2079 ;;; st(0) = st(0) - memory or st(i).
2080 (define-instruction fsubd (segment source)
2081 (:printer floating-point ((op '(#b100 #b100))))
2082 (:printer floating-point-fp ((op '(#b000 #b100))))
2084 (if (fp-reg-tn-p source)
2085 (emit-byte segment #b11011000)
2086 (emit-byte segment #b11011100))
2087 (emit-fp-op segment source #b100)))
2089 ;;; Subtract double, reverse:
2090 ;;; st(0) = memory or st(i) - st(0).
2091 (define-instruction fsubrd (segment source)
2092 (:printer floating-point ((op '(#b100 #b101))))
2093 (:printer floating-point-fp ((op '(#b000 #b101))))
2095 (if (fp-reg-tn-p source)
2096 (emit-byte segment #b11011000)
2097 (emit-byte segment #b11011100))
2098 (emit-fp-op segment source #b101)))
2100 ;;; Subtract double, destination st(i):
2101 ;;; st(i) = st(i) - st(0).
2103 ;;; ASM386 syntax: FSUB ST(i), ST
2104 ;;; Gdb syntax: fsubr %st,%st(i)
2105 (define-instruction fsub-sti (segment destination)
2106 (:printer floating-point-fp ((op '(#b100 #b101))))
2108 (aver (fp-reg-tn-p destination))
2109 (emit-byte segment #b11011100)
2110 (emit-fp-op segment destination #b101)))
2112 (define-instruction fsubp-sti (segment destination)
2113 (:printer floating-point-fp ((op '(#b110 #b101))))
2115 (aver (fp-reg-tn-p destination))
2116 (emit-byte segment #b11011110)
2117 (emit-fp-op segment destination #b101)))
2119 ;;; Subtract double, reverse, destination st(i):
2120 ;;; st(i) = st(0) - st(i).
2122 ;;; ASM386 syntax: FSUBR ST(i), ST
2123 ;;; Gdb syntax: fsub %st,%st(i)
2124 (define-instruction fsubr-sti (segment destination)
2125 (:printer floating-point-fp ((op '(#b100 #b100))))
2127 (aver (fp-reg-tn-p destination))
2128 (emit-byte segment #b11011100)
2129 (emit-fp-op segment destination #b100)))
2131 (define-instruction fsubrp-sti (segment destination)
2132 (:printer floating-point-fp ((op '(#b110 #b100))))
2134 (aver (fp-reg-tn-p destination))
2135 (emit-byte segment #b11011110)
2136 (emit-fp-op segment destination #b100)))
2138 ;;; Multiply single:
2139 ;;; st(0) = st(0) * memory or st(i).
2140 (define-instruction fmul (segment source)
2141 (:printer floating-point ((op '(#b000 #b001))))
2143 (emit-byte segment #b11011000)
2144 (emit-fp-op segment source #b001)))
2146 ;;; Multiply double:
2147 ;;; st(0) = st(0) * memory or st(i).
2148 (define-instruction fmuld (segment source)
2149 (:printer floating-point ((op '(#b100 #b001))))
2150 (:printer floating-point-fp ((op '(#b000 #b001))))
2152 (if (fp-reg-tn-p source)
2153 (emit-byte segment #b11011000)
2154 (emit-byte segment #b11011100))
2155 (emit-fp-op segment source #b001)))
2157 ;;; Multiply double, destination st(i):
2158 ;;; st(i) = st(i) * st(0).
2159 (define-instruction fmul-sti (segment destination)
2160 (:printer floating-point-fp ((op '(#b100 #b001))))
2162 (aver (fp-reg-tn-p destination))
2163 (emit-byte segment #b11011100)
2164 (emit-fp-op segment destination #b001)))
2167 ;;; st(0) = st(0) / memory or st(i).
2168 (define-instruction fdiv (segment source)
2169 (:printer floating-point ((op '(#b000 #b110))))
2171 (emit-byte segment #b11011000)
2172 (emit-fp-op segment source #b110)))
2174 ;;; Divide single, reverse:
2175 ;;; st(0) = memory or st(i) / st(0).
2176 (define-instruction fdivr (segment source)
2177 (:printer floating-point ((op '(#b000 #b111))))
2179 (emit-byte segment #b11011000)
2180 (emit-fp-op segment source #b111)))
2183 ;;; st(0) = st(0) / memory or st(i).
2184 (define-instruction fdivd (segment source)
2185 (:printer floating-point ((op '(#b100 #b110))))
2186 (:printer floating-point-fp ((op '(#b000 #b110))))
2188 (if (fp-reg-tn-p source)
2189 (emit-byte segment #b11011000)
2190 (emit-byte segment #b11011100))
2191 (emit-fp-op segment source #b110)))
2193 ;;; Divide double, reverse:
2194 ;;; st(0) = memory or st(i) / st(0).
2195 (define-instruction fdivrd (segment source)
2196 (:printer floating-point ((op '(#b100 #b111))))
2197 (:printer floating-point-fp ((op '(#b000 #b111))))
2199 (if (fp-reg-tn-p source)
2200 (emit-byte segment #b11011000)
2201 (emit-byte segment #b11011100))
2202 (emit-fp-op segment source #b111)))
2204 ;;; Divide double, destination st(i):
2205 ;;; st(i) = st(i) / st(0).
2207 ;;; ASM386 syntax: FDIV ST(i), ST
2208 ;;; Gdb syntax: fdivr %st,%st(i)
2209 (define-instruction fdiv-sti (segment destination)
2210 (:printer floating-point-fp ((op '(#b100 #b111))))
2212 (aver (fp-reg-tn-p destination))
2213 (emit-byte segment #b11011100)
2214 (emit-fp-op segment destination #b111)))
2216 ;;; Divide double, reverse, destination st(i):
2217 ;;; st(i) = st(0) / st(i).
2219 ;;; ASM386 syntax: FDIVR ST(i), ST
2220 ;;; Gdb syntax: fdiv %st,%st(i)
2221 (define-instruction fdivr-sti (segment destination)
2222 (:printer floating-point-fp ((op '(#b100 #b110))))
2224 (aver (fp-reg-tn-p destination))
2225 (emit-byte segment #b11011100)
2226 (emit-fp-op segment destination #b110)))
2228 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2229 (define-instruction fxch (segment source)
2230 (:printer floating-point-fp ((op '(#b001 #b001))))
2232 (unless (and (tn-p source)
2233 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2235 (emit-byte segment #b11011001)
2236 (emit-fp-op segment source #b001)))
2238 ;;; Push 32-bit integer to st0.
2239 (define-instruction fild (segment source)
2240 (:printer floating-point ((op '(#b011 #b000))))
2242 (emit-byte segment #b11011011)
2243 (emit-fp-op segment source #b000)))
2245 ;;; Push 64-bit integer to st0.
2246 (define-instruction fildl (segment source)
2247 (:printer floating-point ((op '(#b111 #b101))))
2249 (emit-byte segment #b11011111)
2250 (emit-fp-op segment source #b101)))
2252 ;;; Store 32-bit integer.
2253 (define-instruction fist (segment dest)
2254 (:printer floating-point ((op '(#b011 #b010))))
2256 (emit-byte segment #b11011011)
2257 (emit-fp-op segment dest #b010)))
2259 ;;; Store and pop 32-bit integer.
2260 (define-instruction fistp (segment dest)
2261 (:printer floating-point ((op '(#b011 #b011))))
2263 (emit-byte segment #b11011011)
2264 (emit-fp-op segment dest #b011)))
2266 ;;; Store and pop 64-bit integer.
2267 (define-instruction fistpl (segment dest)
2268 (:printer floating-point ((op '(#b111 #b111))))
2270 (emit-byte segment #b11011111)
2271 (emit-fp-op segment dest #b111)))
2273 ;;; Store single from st(0) and pop.
2274 (define-instruction fstp (segment dest)
2275 (:printer floating-point ((op '(#b001 #b011))))
2277 (cond ((fp-reg-tn-p dest)
2278 (emit-byte segment #b11011101)
2279 (emit-fp-op segment dest #b011))
2281 (emit-byte segment #b11011001)
2282 (emit-fp-op segment dest #b011)))))
2284 ;;; Store double from st(0) and pop.
2285 (define-instruction fstpd (segment dest)
2286 (:printer floating-point ((op '(#b101 #b011))))
2287 (:printer floating-point-fp ((op '(#b101 #b011))))
2289 (cond ((fp-reg-tn-p dest)
2290 (emit-byte segment #b11011101)
2291 (emit-fp-op segment dest #b011))
2293 (emit-byte segment #b11011101)
2294 (emit-fp-op segment dest #b011)))))
2296 ;;; Store long from st(0) and pop.
2297 (define-instruction fstpl (segment dest)
2298 (:printer floating-point ((op '(#b011 #b111))))
2300 (emit-byte segment #b11011011)
2301 (emit-fp-op segment dest #b111)))
2303 ;;; Decrement stack-top pointer.
2304 (define-instruction fdecstp (segment)
2305 (:printer floating-point-no ((op #b10110)))
2307 (emit-byte segment #b11011001)
2308 (emit-byte segment #b11110110)))
2310 ;;; Increment stack-top pointer.
2311 (define-instruction fincstp (segment)
2312 (:printer floating-point-no ((op #b10111)))
2314 (emit-byte segment #b11011001)
2315 (emit-byte segment #b11110111)))
2317 ;;; Free fp register.
2318 (define-instruction ffree (segment dest)
2319 (:printer floating-point-fp ((op '(#b101 #b000))))
2321 (emit-byte segment #b11011101)
2322 (emit-fp-op segment dest #b000)))
2324 (define-instruction fabs (segment)
2325 (:printer floating-point-no ((op #b00001)))
2327 (emit-byte segment #b11011001)
2328 (emit-byte segment #b11100001)))
2330 (define-instruction fchs (segment)
2331 (:printer floating-point-no ((op #b00000)))
2333 (emit-byte segment #b11011001)
2334 (emit-byte segment #b11100000)))
2336 (define-instruction frndint(segment)
2337 (:printer floating-point-no ((op #b11100)))
2339 (emit-byte segment #b11011001)
2340 (emit-byte segment #b11111100)))
2343 (define-instruction fninit(segment)
2344 (:printer floating-point-5 ((op #b00011)))
2346 (emit-byte segment #b11011011)
2347 (emit-byte segment #b11100011)))
2349 ;;; Store Status Word to AX.
2350 (define-instruction fnstsw(segment)
2351 (:printer floating-point-st ((op #b00000)))
2353 (emit-byte segment #b11011111)
2354 (emit-byte segment #b11100000)))
2356 ;;; Load Control Word.
2358 ;;; src must be a memory location
2359 (define-instruction fldcw(segment src)
2360 (:printer floating-point ((op '(#b001 #b101))))
2362 (emit-byte segment #b11011001)
2363 (emit-fp-op segment src #b101)))
2365 ;;; Store Control Word.
2366 (define-instruction fnstcw(segment dst)
2367 (:printer floating-point ((op '(#b001 #b111))))
2369 (emit-byte segment #b11011001)
2370 (emit-fp-op segment dst #b111)))
2372 ;;; Store FP Environment.
2373 (define-instruction fstenv(segment dst)
2374 (:printer floating-point ((op '(#b001 #b110))))
2376 (emit-byte segment #b11011001)
2377 (emit-fp-op segment dst #b110)))
2379 ;;; Restore FP Environment.
2380 (define-instruction fldenv(segment src)
2381 (:printer floating-point ((op '(#b001 #b100))))
2383 (emit-byte segment #b11011001)
2384 (emit-fp-op segment src #b100)))
2387 (define-instruction fsave(segment dst)
2388 (:printer floating-point ((op '(#b101 #b110))))
2390 (emit-byte segment #b11011101)
2391 (emit-fp-op segment dst #b110)))
2393 ;;; Restore FP State.
2394 (define-instruction frstor(segment src)
2395 (:printer floating-point ((op '(#b101 #b100))))
2397 (emit-byte segment #b11011101)
2398 (emit-fp-op segment src #b100)))
2400 ;;; Clear exceptions.
2401 (define-instruction fnclex(segment)
2402 (:printer floating-point-5 ((op #b00010)))
2404 (emit-byte segment #b11011011)
2405 (emit-byte segment #b11100010)))
2408 (define-instruction fcom (segment src)
2409 (:printer floating-point ((op '(#b000 #b010))))
2411 (emit-byte segment #b11011000)
2412 (emit-fp-op segment src #b010)))
2414 (define-instruction fcomd (segment src)
2415 (:printer floating-point ((op '(#b100 #b010))))
2416 (:printer floating-point-fp ((op '(#b000 #b010))))
2418 (if (fp-reg-tn-p src)
2419 (emit-byte segment #b11011000)
2420 (emit-byte segment #b11011100))
2421 (emit-fp-op segment src #b010)))
2423 ;;; Compare ST1 to ST0, popping the stack twice.
2424 (define-instruction fcompp (segment)
2425 (:printer floating-point-3 ((op '(#b110 #b011001))))
2427 (emit-byte segment #b11011110)
2428 (emit-byte segment #b11011001)))
2430 ;;; unordered comparison
2431 (define-instruction fucom (segment src)
2432 ;; XX Printer conflicts with frstor
2433 ;; (:printer floating-point ((op '(#b101 #b100))))
2435 (aver (fp-reg-tn-p src))
2436 (emit-byte segment #b11011101)
2437 (emit-fp-op segment src #b100)))
2439 (define-instruction ftst (segment)
2440 (:printer floating-point-no ((op #b00100)))
2442 (emit-byte segment #b11011001)
2443 (emit-byte segment #b11100100)))
2447 (define-instruction fsqrt(segment)
2448 (:printer floating-point-no ((op #b11010)))
2450 (emit-byte segment #b11011001)
2451 (emit-byte segment #b11111010)))
2453 (define-instruction fscale(segment)
2454 (:printer floating-point-no ((op #b11101)))
2456 (emit-byte segment #b11011001)
2457 (emit-byte segment #b11111101)))
2459 (define-instruction fxtract(segment)
2460 (:printer floating-point-no ((op #b10100)))
2462 (emit-byte segment #b11011001)
2463 (emit-byte segment #b11110100)))
2465 (define-instruction fsin(segment)
2466 (:printer floating-point-no ((op #b11110)))
2468 (emit-byte segment #b11011001)
2469 (emit-byte segment #b11111110)))
2471 (define-instruction fcos(segment)
2472 (:printer floating-point-no ((op #b11111)))
2474 (emit-byte segment #b11011001)
2475 (emit-byte segment #b11111111)))
2477 (define-instruction fprem1(segment)
2478 (:printer floating-point-no ((op #b10101)))
2480 (emit-byte segment #b11011001)
2481 (emit-byte segment #b11110101)))
2483 (define-instruction fprem(segment)
2484 (:printer floating-point-no ((op #b11000)))
2486 (emit-byte segment #b11011001)
2487 (emit-byte segment #b11111000)))
2489 (define-instruction fxam (segment)
2490 (:printer floating-point-no ((op #b00101)))
2492 (emit-byte segment #b11011001)
2493 (emit-byte segment #b11100101)))
2495 ;;; These do push/pop to stack and need special handling
2496 ;;; in any VOPs that use them. See the book.
2498 ;;; st0 <- st1*log2(st0)
2499 (define-instruction fyl2x(segment) ; pops stack
2500 (:printer floating-point-no ((op #b10001)))
2502 (emit-byte segment #b11011001)
2503 (emit-byte segment #b11110001)))
2505 (define-instruction fyl2xp1(segment)
2506 (:printer floating-point-no ((op #b11001)))
2508 (emit-byte segment #b11011001)
2509 (emit-byte segment #b11111001)))
2511 (define-instruction f2xm1(segment)
2512 (:printer floating-point-no ((op #b10000)))
2514 (emit-byte segment #b11011001)
2515 (emit-byte segment #b11110000)))
2517 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
2518 (:printer floating-point-no ((op #b10010)))
2520 (emit-byte segment #b11011001)
2521 (emit-byte segment #b11110010)))
2523 (define-instruction fpatan(segment) ; POPS STACK
2524 (:printer floating-point-no ((op #b10011)))
2526 (emit-byte segment #b11011001)
2527 (emit-byte segment #b11110011)))
2529 ;;;; loading constants
2531 (define-instruction fldz(segment)
2532 (:printer floating-point-no ((op #b01110)))
2534 (emit-byte segment #b11011001)
2535 (emit-byte segment #b11101110)))
2537 (define-instruction fld1(segment)
2538 (:printer floating-point-no ((op #b01000)))
2540 (emit-byte segment #b11011001)
2541 (emit-byte segment #b11101000)))
2543 (define-instruction fldpi(segment)
2544 (:printer floating-point-no ((op #b01011)))
2546 (emit-byte segment #b11011001)
2547 (emit-byte segment #b11101011)))
2549 (define-instruction fldl2t(segment)
2550 (:printer floating-point-no ((op #b01001)))
2552 (emit-byte segment #b11011001)
2553 (emit-byte segment #b11101001)))
2555 (define-instruction fldl2e(segment)
2556 (:printer floating-point-no ((op #b01010)))
2558 (emit-byte segment #b11011001)
2559 (emit-byte segment #b11101010)))
2561 (define-instruction fldlg2(segment)
2562 (:printer floating-point-no ((op #b01100)))
2564 (emit-byte segment #b11011001)
2565 (emit-byte segment #b11101100)))
2567 (define-instruction fldln2(segment)
2568 (:printer floating-point-no ((op #b01101)))
2570 (emit-byte segment #b11011001)
2571 (emit-byte segment #b11101101)))