1 ;;;; that part of the description of the x86-64 instruction set
2 ;;;; 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 ;;; This type is used mostly in disassembly and represents legacy
22 ;;; registers only. R8-R15 are handled separately.
23 (deftype reg () '(unsigned-byte 3))
25 ;;; This includes legacy registers and R8-R15.
26 (deftype full-reg () '(unsigned-byte 4))
28 ;;; Default word size for the chip: if the operand size /= :dword
29 ;;; we need to output #x66 (or REX) prefix
30 (def!constant +default-operand-size+ :dword)
32 ;;; The default address size for the chip. It could be overwritten
33 ;;; to :dword with a #x67 prefix, but this is never needed by SBCL
34 ;;; and thus not supported by this assembler/disassembler.
35 (def!constant +default-address-size+ :qword)
37 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
39 (defun offset-next (value dstate)
40 (declare (type integer value)
41 (type sb!disassem:disassem-state dstate))
42 (+ (sb!disassem:dstate-next-addr dstate) value))
44 (defparameter *byte-reg-names*
45 #(al cl dl bl spl bpl sil dil r8b r9b r10b r11b r12b r13b r14b r15b))
46 (defparameter *high-byte-reg-names*
48 (defparameter *word-reg-names*
49 #(ax cx dx bx sp bp si di r8w r9w r10w r11w r12w r13w r14w r15w))
50 (defparameter *dword-reg-names*
51 #(eax ecx edx ebx esp ebp esi edi r8d r9d r10d r11d r12d r13d r14d r15d))
52 (defparameter *qword-reg-names*
53 #(rax rcx rdx rbx rsp rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15))
55 ;;; The printers for registers, memory references and immediates need to
56 ;;; take into account the width bit in the instruction, whether a #x66
57 ;;; or a REX prefix was issued, and the contents of the REX prefix.
58 ;;; This is implemented using prefilters to put flags into the slot
59 ;;; INST-PROPERTIES of the DSTATE. These flags are the following
62 ;;; OPERAND-SIZE-8 The width bit was zero
63 ;;; OPERAND-SIZE-16 The "operand size override" prefix (#x66) was found
64 ;;; REX A REX prefix was found
65 ;;; REX-W A REX prefix with the "operand width" bit set was
67 ;;; REX-R A REX prefix with the "register" bit set was found
68 ;;; REX-X A REX prefix with the "index" bit set was found
69 ;;; REX-B A REX prefix with the "base" bit set was found
71 ;;; Return the operand size depending on the prefixes and width bit as
73 (defun inst-operand-size (dstate)
74 (declare (type sb!disassem:disassem-state dstate))
75 (cond ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-8)
77 ((sb!disassem:dstate-get-inst-prop dstate 'rex-w)
79 ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
82 +default-operand-size+)))
84 ;;; The same as INST-OPERAND-SIZE, but for those instructions (e.g.
85 ;;; PUSH, JMP) that have a default operand size of :qword. It can only
86 ;;; be overwritten to :word.
87 (defun inst-operand-size-default-qword (dstate)
88 (declare (type sb!disassem:disassem-state dstate))
89 (if (sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
93 ;;; Print to STREAM the name of the general purpose register encoded by
94 ;;; VALUE and of size WIDTH. For robustness, the high byte registers
95 ;;; (AH, BH, CH, DH) are correctly detected, too, although the compiler
96 ;;; does not use them.
97 (defun print-reg-with-width (value width stream dstate)
98 (declare (type full-reg value)
100 (type sb!disassem:disassem-state dstate))
101 (princ (if (and (eq width :byte)
103 (not (sb!disassem:dstate-get-inst-prop dstate 'rex)))
104 (aref *high-byte-reg-names* (- value 4))
106 (:byte *byte-reg-names*)
107 (:word *word-reg-names*)
108 (:dword *dword-reg-names*)
109 (:qword *qword-reg-names*))
112 ;; XXX plus should do some source-var notes
115 (defun print-reg (value stream dstate)
116 (declare (type full-reg value)
118 (type sb!disassem:disassem-state dstate))
119 (print-reg-with-width value
120 (inst-operand-size dstate)
124 (defun print-reg-default-qword (value stream dstate)
125 (declare (type full-reg value)
127 (type sb!disassem:disassem-state dstate))
128 (print-reg-with-width value
129 (inst-operand-size-default-qword dstate)
133 (defun print-byte-reg (value stream dstate)
134 (declare (type full-reg value)
136 (type sb!disassem:disassem-state dstate))
137 (print-reg-with-width value :byte stream dstate))
139 (defun print-addr-reg (value stream dstate)
140 (declare (type full-reg value)
142 (type sb!disassem:disassem-state dstate))
143 (print-reg-with-width value +default-address-size+ stream dstate))
145 ;;; Print a register or a memory reference of the given WIDTH.
146 ;;; If SIZED-P is true, add an explicit size indicator for memory
148 (defun print-reg/mem-with-width (value width sized-p stream dstate)
149 (declare (type (or list full-reg) value)
150 (type (member :byte :word :dword :qword) width)
151 (type boolean sized-p)
153 (type sb!disassem:disassem-state dstate))
154 (if (typep value 'full-reg)
155 (print-reg-with-width value width stream dstate)
156 (print-mem-access value (and sized-p width) stream dstate)))
158 ;;; Print a register or a memory reference. The width is determined by
159 ;;; calling INST-OPERAND-SIZE.
160 (defun print-reg/mem (value stream dstate)
161 (declare (type (or list full-reg) value)
163 (type sb!disassem:disassem-state dstate))
164 (print-reg/mem-with-width
165 value (inst-operand-size dstate) nil stream dstate))
167 ;; Same as print-reg/mem, but prints an explicit size indicator for
168 ;; memory references.
169 (defun print-sized-reg/mem (value stream dstate)
170 (declare (type (or list full-reg) value)
172 (type sb!disassem:disassem-state dstate))
173 (print-reg/mem-with-width
174 value (inst-operand-size dstate) t stream dstate))
176 ;;; Same as print-sized-reg/mem, but with a default operand size of
178 (defun print-sized-reg/mem-default-qword (value stream dstate)
179 (declare (type (or list full-reg) value)
181 (type sb!disassem:disassem-state dstate))
182 (print-reg/mem-with-width
183 value (inst-operand-size-default-qword dstate) t stream dstate))
185 (defun print-sized-byte-reg/mem (value stream dstate)
186 (declare (type (or list full-reg) value)
188 (type sb!disassem:disassem-state dstate))
189 (print-reg/mem-with-width value :byte t stream dstate))
191 (defun print-sized-word-reg/mem (value stream dstate)
192 (declare (type (or list full-reg) value)
194 (type sb!disassem:disassem-state dstate))
195 (print-reg/mem-with-width value :word t stream dstate))
197 (defun print-sized-dword-reg/mem (value stream dstate)
198 (declare (type (or list full-reg) value)
200 (type sb!disassem:disassem-state dstate))
201 (print-reg/mem-with-width value :dword t stream dstate))
203 (defun print-label (value stream dstate)
204 (declare (ignore dstate))
205 (sb!disassem:princ16 value stream))
207 ;;; This prefilter is used solely for its side effects, namely to put
208 ;;; the bits found in the REX prefix into the DSTATE for use by other
209 ;;; prefilters and by printers.
210 (defun prefilter-wrxb (value dstate)
211 (declare (type (unsigned-byte 4) value)
212 (type sb!disassem:disassem-state dstate))
213 (sb!disassem:dstate-put-inst-prop dstate 'rex)
214 (when (plusp (logand value #b1000))
215 (sb!disassem:dstate-put-inst-prop dstate 'rex-w))
216 (when (plusp (logand value #b0100))
217 (sb!disassem:dstate-put-inst-prop dstate 'rex-r))
218 (when (plusp (logand value #b0010))
219 (sb!disassem:dstate-put-inst-prop dstate 'rex-x))
220 (when (plusp (logand value #b0001))
221 (sb!disassem:dstate-put-inst-prop dstate 'rex-b))
224 ;;; This prefilter is used solely for its side effect, namely to put
225 ;;; the property OPERAND-SIZE-8 into the DSTATE if VALUE is 0.
226 (defun prefilter-width (value dstate)
227 (declare (type bit value)
228 (type sb!disassem:disassem-state dstate))
230 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-8))
233 ;;; A register field that can be extended by REX.R.
234 (defun prefilter-reg-r (value dstate)
235 (declare (type reg value)
236 (type sb!disassem:disassem-state dstate))
237 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-r)
241 ;;; A register field that can be extended by REX.B.
242 (defun prefilter-reg-b (value dstate)
243 (declare (type reg value)
244 (type sb!disassem:disassem-state dstate))
245 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-b)
249 ;;; Returns either an integer, meaning a register, or a list of
250 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
251 ;;; may be missing or nil to indicate that it's not used or has the
252 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
253 ;;; of the mod and r/m field of the ModRM byte of the instruction.
254 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
255 ;;; REX.B bit from DSTATE is used to extend the sole register or the
256 ;;; BASE-REG to a full register, the REX.X bit does the same for the
258 (defun prefilter-reg/mem (value dstate)
259 (declare (type list value)
260 (type sb!disassem:disassem-state dstate))
261 (let ((mod (first value))
262 (r/m (second value)))
263 (declare (type (unsigned-byte 2) mod)
264 (type (unsigned-byte 3) r/m))
265 (let ((full-reg (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
268 (declare (type full-reg full-reg))
274 (let ((sib (sb!disassem:read-suffix 8 dstate)))
275 (declare (type (unsigned-byte 8) sib))
276 (let ((base-reg (ldb (byte 3 0) sib))
277 (index-reg (ldb (byte 3 3) sib))
278 (index-scale (ldb (byte 2 6) sib)))
279 (declare (type (unsigned-byte 3) base-reg index-reg)
280 (type (unsigned-byte 2) index-scale))
284 (if (= base-reg #b101)
285 (sb!disassem:read-signed-suffix 32 dstate)
288 (sb!disassem:read-signed-suffix 8 dstate))
290 (sb!disassem:read-signed-suffix 32 dstate)))))
291 (list (unless (and (= mod #b00) (= base-reg #b101))
292 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
296 (unless (= index-reg #b100)
297 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-x)
300 (ash 1 index-scale))))))
301 ((and (= mod #b00) (= r/m #b101))
302 (list 'rip (sb!disassem:read-signed-suffix 32 dstate)) )
306 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
308 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
310 (defun read-address (value dstate)
311 (declare (ignore value)) ; always nil anyway
312 (sb!disassem:read-suffix (width-bits (inst-operand-size dstate)) dstate))
314 (defun width-bits (width)
325 ;;;; disassembler argument types
327 ;;; Used to capture the lower four bits of the REX prefix.
328 (sb!disassem:define-arg-type wrxb
329 :prefilter #'prefilter-wrxb)
331 (sb!disassem:define-arg-type width
332 :prefilter #'prefilter-width
333 :printer (lambda (value stream dstate)
334 (declare (ignore value))
335 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
338 (sb!disassem:define-arg-type displacement
340 :use-label #'offset-next
341 :printer (lambda (value stream dstate)
342 (sb!disassem:maybe-note-assembler-routine value nil dstate)
343 (print-label value stream dstate)))
345 (sb!disassem:define-arg-type accum
346 :printer (lambda (value stream dstate)
347 (declare (ignore value)
349 (type sb!disassem:disassem-state dstate))
350 (print-reg 0 stream dstate)))
352 (sb!disassem:define-arg-type reg
353 :prefilter #'prefilter-reg-r
354 :printer #'print-reg)
356 (sb!disassem:define-arg-type reg-b
357 :prefilter #'prefilter-reg-b
358 :printer #'print-reg)
360 (sb!disassem:define-arg-type reg-b-default-qword
361 :prefilter #'prefilter-reg-b
362 :printer #'print-reg-default-qword)
364 (sb!disassem:define-arg-type imm-addr
365 :prefilter #'read-address
366 :printer #'print-label)
368 ;;; Normally, immediate values for an operand size of :qword are of size
369 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
370 ;;; argument type definition following this one.
371 (sb!disassem:define-arg-type signed-imm-data
372 :prefilter (lambda (value dstate)
373 (declare (ignore value)) ; always nil anyway
374 (let ((width (width-bits (inst-operand-size dstate))))
377 (sb!disassem:read-signed-suffix width dstate))))
379 ;;; Used by the variant of the MOV instruction with opcode B8 which can
380 ;;; move immediates of all sizes (i.e. including :qword) into a
382 (sb!disassem:define-arg-type signed-imm-data-upto-qword
383 :prefilter (lambda (value dstate)
384 (declare (ignore value)) ; always nil anyway
385 (sb!disassem:read-signed-suffix
386 (width-bits (inst-operand-size dstate))
389 ;;; Used by those instructions that have a default operand size of
390 ;;; :qword. Nevertheless the immediate is at most of size :dword.
391 ;;; The only instruction of this kind having a variant with an immediate
392 ;;; argument is PUSH.
393 (sb!disassem:define-arg-type signed-imm-data-default-qword
394 :prefilter (lambda (value dstate)
395 (declare (ignore value)) ; always nil anyway
396 (let ((width (width-bits
397 (inst-operand-size-default-qword dstate))))
400 (sb!disassem:read-signed-suffix width dstate))))
402 (sb!disassem:define-arg-type signed-imm-byte
403 :prefilter (lambda (value dstate)
404 (declare (ignore value)) ; always nil anyway
405 (sb!disassem:read-signed-suffix 8 dstate)))
407 (sb!disassem:define-arg-type imm-byte
408 :prefilter (lambda (value dstate)
409 (declare (ignore value)) ; always nil anyway
410 (sb!disassem:read-suffix 8 dstate)))
412 ;;; needed for the ret imm16 instruction
413 (sb!disassem:define-arg-type imm-word-16
414 :prefilter (lambda (value dstate)
415 (declare (ignore value)) ; always nil anyway
416 (sb!disassem:read-suffix 16 dstate)))
418 (sb!disassem:define-arg-type reg/mem
419 :prefilter #'prefilter-reg/mem
420 :printer #'print-reg/mem)
421 (sb!disassem:define-arg-type sized-reg/mem
422 ;; Same as reg/mem, but prints an explicit size indicator for
423 ;; memory references.
424 :prefilter #'prefilter-reg/mem
425 :printer #'print-sized-reg/mem)
427 ;;; Arguments of type reg/mem with a fixed size.
428 (sb!disassem:define-arg-type sized-byte-reg/mem
429 :prefilter #'prefilter-reg/mem
430 :printer #'print-sized-byte-reg/mem)
431 (sb!disassem:define-arg-type sized-word-reg/mem
432 :prefilter #'prefilter-reg/mem
433 :printer #'print-sized-word-reg/mem)
434 (sb!disassem:define-arg-type sized-dword-reg/mem
435 :prefilter #'prefilter-reg/mem
436 :printer #'print-sized-dword-reg/mem)
438 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
439 (sb!disassem:define-arg-type sized-reg/mem-default-qword
440 :prefilter #'prefilter-reg/mem
441 :printer #'print-sized-reg/mem-default-qword)
444 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
445 (defun print-fp-reg (value stream dstate)
446 (declare (ignore dstate))
447 (format stream "FR~D" value))
448 (defun prefilter-fp-reg (value dstate)
450 (declare (ignore dstate))
453 (sb!disassem:define-arg-type fp-reg
454 :prefilter #'prefilter-fp-reg
455 :printer #'print-fp-reg)
457 (eval-when (:compile-toplevel :load-toplevel :execute)
458 (defparameter *conditions*
461 (:b . 2) (:nae . 2) (:c . 2)
462 (:nb . 3) (:ae . 3) (:nc . 3)
463 (:eq . 4) (:e . 4) (:z . 4)
470 (:np . 11) (:po . 11)
471 (:l . 12) (:nge . 12)
472 (:nl . 13) (:ge . 13)
473 (:le . 14) (:ng . 14)
474 (:nle . 15) (:g . 15)))
475 (defparameter *condition-name-vec*
476 (let ((vec (make-array 16 :initial-element nil)))
477 (dolist (cond *conditions*)
478 (when (null (aref vec (cdr cond)))
479 (setf (aref vec (cdr cond)) (car cond))))
483 ;;; Set assembler parameters. (In CMU CL, this was done with
484 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
485 (eval-when (:compile-toplevel :load-toplevel :execute)
486 (setf sb!assem:*assem-scheduler-p* nil))
488 (sb!disassem:define-arg-type condition-code
489 :printer *condition-name-vec*)
491 (defun conditional-opcode (condition)
492 (cdr (assoc condition *conditions* :test #'eq)))
494 ;;;; disassembler instruction formats
496 (eval-when (:compile-toplevel :execute)
497 (defun swap-if (direction field1 separator field2)
498 `(:if (,direction :constant 0)
499 (,field1 ,separator ,field2)
500 (,field2 ,separator ,field1))))
502 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
503 (op :field (byte 8 0))
508 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
509 ;;; operand size of :word.
510 (sb!disassem:define-instruction-format (x66-byte 16
511 :default-printer '(:name))
512 (x66 :field (byte 8 0) :value #x66)
513 (op :field (byte 8 8)))
515 ;;; A one-byte instruction with a REX prefix, used to indicate an
516 ;;; operand size of :qword. REX.W must be 1, the other three bits are
518 (sb!disassem:define-instruction-format (rex-byte 16
519 :default-printer '(:name))
520 (rex :field (byte 5 3) :value #b01001)
521 (op :field (byte 8 8)))
523 (sb!disassem:define-instruction-format (simple 8)
524 (op :field (byte 7 1))
525 (width :field (byte 1 0) :type 'width)
530 (sb!disassem:define-instruction-format (rex-simple 16)
531 (rex :field (byte 4 4) :value #b0100)
532 (wrxb :field (byte 4 0) :type 'wrxb)
533 (op :field (byte 7 9))
534 (width :field (byte 1 8) :type 'width)
539 ;;; Same as simple, but with direction bit
540 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
541 (op :field (byte 6 2))
542 (dir :field (byte 1 1)))
544 ;;; Same as simple, but with the immediate value occurring by default,
545 ;;; and with an appropiate printer.
546 (sb!disassem:define-instruction-format (accum-imm 8
548 :default-printer '(:name
549 :tab accum ", " imm))
550 (imm :type 'signed-imm-data))
552 (sb!disassem:define-instruction-format (rex-accum-imm 16
554 :default-printer '(:name
555 :tab accum ", " imm))
556 (imm :type 'signed-imm-data))
558 (sb!disassem:define-instruction-format (reg-no-width 8
559 :default-printer '(:name :tab reg))
560 (op :field (byte 5 3))
561 (reg :field (byte 3 0) :type 'reg-b)
566 (sb!disassem:define-instruction-format (rex-reg-no-width 16
567 :default-printer '(:name :tab reg))
568 (rex :field (byte 4 4) :value #b0100)
569 (wrxb :field (byte 4 0) :type 'wrxb)
570 (op :field (byte 5 11))
571 (reg :field (byte 3 8) :type 'reg-b)
576 ;;; Same as reg-no-width, but with a default operand size of :qword.
577 (sb!disassem:define-instruction-format (reg-no-width-default-qword 8
578 :include 'reg-no-width
579 :default-printer '(:name :tab reg))
580 (reg :type 'reg-b-default-qword))
582 ;;; Same as rex-reg-no-width, but with a default operand size of :qword.
583 (sb!disassem:define-instruction-format (rex-reg-no-width-default-qword 16
584 :include 'rex-reg-no-width
585 :default-printer '(:name :tab reg))
586 (reg :type 'reg-b-default-qword))
588 (sb!disassem:define-instruction-format (modrm-reg-no-width 24
589 :default-printer '(:name :tab reg))
590 (rex :field (byte 4 4) :value #b0100)
591 (wrxb :field (byte 4 0) :type 'wrxb)
592 (ff :field (byte 8 8) :value #b11111111)
593 (mod :field (byte 2 22))
594 (modrm-reg :field (byte 3 19))
595 (reg :field (byte 3 16) :type 'reg-b)
600 ;;; Adds a width field to reg-no-width. Note that we can't use
601 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
602 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
603 ;;; the one for IMM to be able to determine the correct size of IMM.
604 (sb!disassem:define-instruction-format (reg 8
605 :default-printer '(:name :tab reg))
606 (op :field (byte 4 4))
607 (width :field (byte 1 3) :type 'width)
608 (reg :field (byte 3 0) :type 'reg-b)
613 (sb!disassem:define-instruction-format (rex-reg 16
614 :default-printer '(:name :tab reg))
615 (rex :field (byte 4 4) :value #b0100)
616 (wrxb :field (byte 4 0) :type 'wrxb)
617 (width :field (byte 1 11) :type 'width)
618 (op :field (byte 4 12))
619 (reg :field (byte 3 8) :type 'reg-b)
624 (sb!disassem:define-instruction-format (two-bytes 16
625 :default-printer '(:name))
626 (op :fields (list (byte 8 0) (byte 8 8))))
628 (sb!disassem:define-instruction-format (reg-reg/mem 16
630 `(:name :tab reg ", " reg/mem))
631 (op :field (byte 7 1))
632 (width :field (byte 1 0) :type 'width)
633 (reg/mem :fields (list (byte 2 14) (byte 3 8))
635 (reg :field (byte 3 11) :type 'reg)
639 (sb!disassem:define-instruction-format (rex-reg-reg/mem 24
641 `(:name :tab reg ", " reg/mem))
642 (rex :field (byte 4 4) :value #b0100)
643 (wrxb :field (byte 4 0) :type 'wrxb)
644 (width :field (byte 1 8) :type 'width)
645 (op :field (byte 7 9))
646 (reg/mem :fields (list (byte 2 22) (byte 3 16))
648 (reg :field (byte 3 19) :type 'reg)
652 ;;; same as reg-reg/mem, but with direction bit
653 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
654 :include 'reg-reg/mem
658 ,(swap-if 'dir 'reg/mem ", " 'reg)))
659 (op :field (byte 6 2))
660 (dir :field (byte 1 1)))
662 (sb!disassem:define-instruction-format (rex-reg-reg/mem-dir 24
663 :include 'rex-reg-reg/mem
667 ,(swap-if 'dir 'reg/mem ", " 'reg)))
668 (op :field (byte 6 10))
669 (dir :field (byte 1 9)))
671 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
672 (sb!disassem:define-instruction-format (reg/mem 16
673 :default-printer '(:name :tab reg/mem))
674 (op :fields (list (byte 7 1) (byte 3 11)))
675 (width :field (byte 1 0) :type 'width)
676 (reg/mem :fields (list (byte 2 14) (byte 3 8))
677 :type 'sized-reg/mem)
681 (sb!disassem:define-instruction-format (rex-reg/mem 24
682 :default-printer '(:name :tab reg/mem))
683 (rex :field (byte 4 4) :value #b0100)
684 (wrxb :field (byte 4 0) :type 'wrxb)
685 (op :fields (list (byte 7 9) (byte 3 19)))
686 (width :field (byte 1 8) :type 'width)
687 (reg/mem :fields (list (byte 2 22) (byte 3 16))
688 :type 'sized-reg/mem)
692 ;;; Same as reg/mem, but without a width field and with a default
693 ;;; operand size of :qword.
694 (sb!disassem:define-instruction-format (reg/mem-default-qword 16
695 :default-printer '(:name :tab reg/mem))
696 (op :fields (list (byte 8 0) (byte 3 11)))
697 (reg/mem :fields (list (byte 2 14) (byte 3 8))
698 :type 'sized-reg/mem-default-qword))
700 (sb!disassem:define-instruction-format (rex-reg/mem-default-qword 24
701 :default-printer '(:name :tab reg/mem))
702 (rex :field (byte 4 4) :value #b0100)
703 (wrxb :field (byte 4 0) :type 'wrxb)
704 (op :fields (list (byte 8 8) (byte 3 19)))
705 (reg/mem :fields (list (byte 2 22) (byte 3 16))
706 :type 'sized-reg/mem-default-qword))
708 ;;; Same as reg/mem, but with the immediate value occurring by default,
709 ;;; and with an appropiate printer.
710 (sb!disassem:define-instruction-format (reg/mem-imm 16
713 '(:name :tab reg/mem ", " imm))
714 (reg/mem :type 'sized-reg/mem)
715 (imm :type 'signed-imm-data))
717 (sb!disassem:define-instruction-format (rex-reg/mem-imm 24
718 :include 'rex-reg/mem
720 '(:name :tab reg/mem ", " imm))
721 (reg/mem :type 'sized-reg/mem)
722 (imm :type 'signed-imm-data))
724 ;;; Same as reg/mem, but with using the accumulator in the default printer
725 (sb!disassem:define-instruction-format
727 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
728 (reg/mem :type 'reg/mem) ; don't need a size
729 (accum :type 'accum))
731 (sb!disassem:define-instruction-format (rex-accum-reg/mem 24
732 :include 'rex-reg/mem
734 '(:name :tab accum ", " reg/mem))
735 (reg/mem :type 'reg/mem) ; don't need a size
736 (accum :type 'accum))
738 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
739 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
741 `(:name :tab reg ", " reg/mem))
742 (prefix :field (byte 8 0) :value #b00001111)
743 (op :field (byte 7 9))
744 (width :field (byte 1 8) :type 'width)
745 (reg/mem :fields (list (byte 2 22) (byte 3 16))
747 (reg :field (byte 3 19) :type 'reg)
751 (sb!disassem:define-instruction-format (ext-reg-reg/mem-no-width 24
753 `(:name :tab reg ", " reg/mem))
754 (prefix :field (byte 8 0) :value #b00001111)
755 (op :field (byte 8 8))
756 (reg/mem :fields (list (byte 2 22) (byte 3 16))
758 (reg :field (byte 3 19) :type 'reg))
760 (sb!disassem:define-instruction-format (rex-ext-reg-reg/mem-no-width 32
762 `(:name :tab reg ", " reg/mem))
763 (rex :field (byte 4 4) :value #b0100)
764 (wrxb :field (byte 4 0) :type 'wrxb)
765 (prefix :field (byte 8 8) :value #b00001111)
766 (op :field (byte 8 16))
767 (reg/mem :fields (list (byte 2 30) (byte 3 24))
769 (reg :field (byte 3 27) :type 'reg))
771 ;;; Same as reg-reg/mem, but with a prefix of #xf2 0f
772 (sb!disassem:define-instruction-format (xmm-ext-reg-reg/mem 32
774 `(:name :tab reg ", " reg/mem))
775 (prefix :field (byte 8 0) :value #xf2)
776 (prefix2 :field (byte 8 8) :value #x0f)
777 (op :field (byte 7 17))
778 (width :field (byte 1 16) :type 'width)
779 (reg/mem :fields (list (byte 2 30) (byte 3 24))
781 (reg :field (byte 3 27) :type 'reg)
785 ;;; reg-no-width with #x0f prefix
786 (sb!disassem:define-instruction-format (ext-reg-no-width 16
787 :default-printer '(:name :tab reg))
788 (prefix :field (byte 8 0) :value #b00001111)
789 (op :field (byte 5 11))
790 (reg :field (byte 3 8) :type 'reg-b))
792 ;;; Same as reg/mem, but with a prefix of #b00001111
793 (sb!disassem:define-instruction-format (ext-reg/mem 24
794 :default-printer '(:name :tab reg/mem))
795 (prefix :field (byte 8 0) :value #b00001111)
796 (op :fields (list (byte 7 9) (byte 3 19)))
797 (width :field (byte 1 8) :type 'width)
798 (reg/mem :fields (list (byte 2 22) (byte 3 16))
799 :type 'sized-reg/mem)
803 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
804 :include 'ext-reg/mem
806 '(:name :tab reg/mem ", " imm))
807 (imm :type 'signed-imm-data))
809 ;;;; This section was added by jrd, for fp instructions.
811 ;;; regular fp inst to/from registers/memory
812 (sb!disassem:define-instruction-format (floating-point 16
814 `(:name :tab reg/mem))
815 (prefix :field (byte 5 3) :value #b11011)
816 (op :fields (list (byte 3 0) (byte 3 11)))
817 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
819 ;;; fp insn to/from fp reg
820 (sb!disassem:define-instruction-format (floating-point-fp 16
821 :default-printer `(:name :tab fp-reg))
822 (prefix :field (byte 5 3) :value #b11011)
823 (suffix :field (byte 2 14) :value #b11)
824 (op :fields (list (byte 3 0) (byte 3 11)))
825 (fp-reg :field (byte 3 8) :type 'fp-reg))
827 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
828 (sb!disassem:define-instruction-format
829 (floating-point-fp-d 16
830 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
831 (prefix :field (byte 5 3) :value #b11011)
832 (suffix :field (byte 2 14) :value #b11)
833 (op :fields (list (byte 2 0) (byte 3 11)))
834 (d :field (byte 1 2))
835 (fp-reg :field (byte 3 8) :type 'fp-reg))
838 ;;; (added by (?) pfw)
839 ;;; fp no operand isns
840 (sb!disassem:define-instruction-format (floating-point-no 16
841 :default-printer '(:name))
842 (prefix :field (byte 8 0) :value #b11011001)
843 (suffix :field (byte 3 13) :value #b111)
844 (op :field (byte 5 8)))
846 (sb!disassem:define-instruction-format (floating-point-3 16
847 :default-printer '(:name))
848 (prefix :field (byte 5 3) :value #b11011)
849 (suffix :field (byte 2 14) :value #b11)
850 (op :fields (list (byte 3 0) (byte 6 8))))
852 (sb!disassem:define-instruction-format (floating-point-5 16
853 :default-printer '(:name))
854 (prefix :field (byte 8 0) :value #b11011011)
855 (suffix :field (byte 3 13) :value #b111)
856 (op :field (byte 5 8)))
858 (sb!disassem:define-instruction-format (floating-point-st 16
859 :default-printer '(:name))
860 (prefix :field (byte 8 0) :value #b11011111)
861 (suffix :field (byte 3 13) :value #b111)
862 (op :field (byte 5 8)))
864 (sb!disassem:define-instruction-format (string-op 8
866 :default-printer '(:name width)))
868 (sb!disassem:define-instruction-format (rex-string-op 16
870 :default-printer '(:name width)))
872 (sb!disassem:define-instruction-format (short-cond-jump 16)
873 (op :field (byte 4 4))
874 (cc :field (byte 4 0) :type 'condition-code)
875 (label :field (byte 8 8) :type 'displacement))
877 (sb!disassem:define-instruction-format (short-jump 16
878 :default-printer '(:name :tab label))
879 (const :field (byte 4 4) :value #b1110)
880 (op :field (byte 4 0))
881 (label :field (byte 8 8) :type 'displacement))
883 (sb!disassem:define-instruction-format (near-cond-jump 16)
884 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
885 (cc :field (byte 4 8) :type 'condition-code)
886 ;; The disassembler currently doesn't let you have an instruction > 32 bits
887 ;; long, so we fake it by using a prefilter to read the offset.
888 (label :type 'displacement
889 :prefilter (lambda (value dstate)
890 (declare (ignore value)) ; always nil anyway
891 (sb!disassem:read-signed-suffix 32 dstate))))
893 (sb!disassem:define-instruction-format (near-jump 8
894 :default-printer '(:name :tab label))
895 (op :field (byte 8 0))
896 ;; The disassembler currently doesn't let you have an instruction > 32 bits
897 ;; long, so we fake it by using a prefilter to read the address.
898 (label :type 'displacement
899 :prefilter (lambda (value dstate)
900 (declare (ignore value)) ; always nil anyway
901 (sb!disassem:read-signed-suffix 32 dstate))))
904 (sb!disassem:define-instruction-format (cond-set 24
905 :default-printer '('set cc :tab reg/mem))
906 (prefix :field (byte 8 0) :value #b00001111)
907 (op :field (byte 4 12) :value #b1001)
908 (cc :field (byte 4 8) :type 'condition-code)
909 (reg/mem :fields (list (byte 2 22) (byte 3 16))
910 :type 'sized-byte-reg/mem)
911 (reg :field (byte 3 19) :value #b000))
913 (sb!disassem:define-instruction-format (cond-move 24
915 '('cmov cc :tab reg ", " reg/mem))
916 (prefix :field (byte 8 0) :value #b00001111)
917 (op :field (byte 4 12) :value #b0100)
918 (cc :field (byte 4 8) :type 'condition-code)
919 (reg/mem :fields (list (byte 2 22) (byte 3 16))
921 (reg :field (byte 3 19) :type 'reg))
923 (sb!disassem:define-instruction-format (rex-cond-move 32
925 '('cmov cc :tab reg ", " reg/mem))
926 (rex :field (byte 4 4) :value #b0100)
927 (wrxb :field (byte 4 0) :type 'wrxb)
928 (prefix :field (byte 8 8) :value #b00001111)
929 (op :field (byte 4 20) :value #b0100)
930 (cc :field (byte 4 16) :type 'condition-code)
931 (reg/mem :fields (list (byte 2 30) (byte 3 24))
933 (reg :field (byte 3 27) :type 'reg))
935 (sb!disassem:define-instruction-format (enter-format 32
936 :default-printer '(:name
938 (:unless (:constant 0)
940 (op :field (byte 8 0))
941 (disp :field (byte 16 8))
942 (level :field (byte 8 24)))
944 ;;; Single byte instruction with an immediate byte argument.
945 (sb!disassem:define-instruction-format (byte-imm 16
946 :default-printer '(:name :tab code))
947 (op :field (byte 8 0))
948 (code :field (byte 8 8)))
950 ;;;; primitive emitters
952 (define-bitfield-emitter emit-word 16
955 (define-bitfield-emitter emit-dword 32
958 (define-bitfield-emitter emit-qword 64
961 (define-bitfield-emitter emit-byte-with-reg 8
962 (byte 5 3) (byte 3 0))
964 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
965 (byte 2 6) (byte 3 3) (byte 3 0))
967 (define-bitfield-emitter emit-sib-byte 8
968 (byte 2 6) (byte 3 3) (byte 3 0))
970 (define-bitfield-emitter emit-rex-byte 8
971 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
977 (defun emit-absolute-fixup (segment fixup &optional quad-p)
978 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
979 (let ((offset (fixup-offset fixup)))
981 (emit-back-patch segment
983 (lambda (segment posn)
984 (declare (ignore posn))
985 (let ((val (- (+ (component-header-length)
986 (or (label-position offset)
988 other-pointer-lowtag)))
990 (emit-qword segment val )
991 (emit-dword segment val )))))
993 (emit-qword segment (or offset 0))
994 (emit-dword segment (or offset 0))))))
996 (defun emit-relative-fixup (segment fixup)
997 (note-fixup segment :relative fixup)
998 (emit-dword segment (or (fixup-offset fixup) 0)))
1001 ;;;; the effective-address (ea) structure
1003 (defun reg-tn-encoding (tn)
1004 (declare (type tn tn))
1005 (aver (member (sb-name (sc-sb (tn-sc tn))) '(registers float-registers)))
1006 ;; ea only has space for three bits of register number: regs r8
1007 ;; and up are selected by a REX prefix byte which caller is responsible
1008 ;; for having emitted where necessary already
1009 (cond ((fp-reg-tn-p tn)
1010 (mod (tn-offset tn) 8))
1012 (let ((offset (mod (tn-offset tn) 16)))
1013 (logior (ash (logand offset 1) 2)
1014 (ash offset -1))))))
1016 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1018 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1019 ;; can't actually emit it on its own: caller also needs to emit REX
1021 (size nil :type (member :byte :word :dword :qword))
1022 (base nil :type (or tn null))
1023 (index nil :type (or tn null))
1024 (scale 1 :type (member 1 2 4 8))
1025 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1026 (def!method print-object ((ea ea) stream)
1027 (cond ((or *print-escape* *print-readably*)
1028 (print-unreadable-object (ea stream :type t)
1030 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1034 (let ((scale (ea-scale ea)))
1035 (if (= scale 1) nil scale))
1038 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1040 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1042 (write-string "+" stream)))
1044 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1045 (unless (= (ea-scale ea) 1)
1046 (format stream "*~A" (ea-scale ea)))
1047 (typecase (ea-disp ea)
1050 (format stream "~@D" (ea-disp ea)))
1052 (format stream "+~A" (ea-disp ea))))
1053 (write-char #\] stream))))
1055 (defun emit-constant-tn-rip (segment constant-tn reg)
1056 ;; AMD64 doesn't currently have a code object register to use as a
1057 ;; base register for constant access. Instead we use RIP-relative
1058 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1059 ;; is passed to the backpatch callback. In addition we need the offset
1060 ;; from the start of the function header to the slot in the CODE-HEADER
1061 ;; that stores the constant. Since we don't know where the code header
1062 ;; starts, instead count backwards from the function header.
1063 (let* ((2comp (component-info *component-being-compiled*))
1064 (constants (ir2-component-constants 2comp))
1065 (len (length constants))
1066 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1067 ;; If there are an even amount of constants, there will be
1068 ;; an extra qword of padding before the function header, which
1069 ;; needs to be adjusted for. XXX: This will break if new slots
1070 ;; are added to the code header.
1071 (offset (* (- (+ len (if (evenp len)
1074 (tn-offset constant-tn))
1076 ;; RIP-relative addressing
1077 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1078 (emit-back-patch segment
1080 (lambda (segment posn)
1081 ;; The addressing is relative to end of instruction,
1082 ;; i.e. the end of this dword. Hence the + 4.
1083 (emit-dword segment (+ 4 (- (+ offset posn)))))))
1086 (defun emit-label-rip (segment fixup reg)
1087 (let ((label (fixup-offset fixup)))
1088 ;; RIP-relative addressing
1089 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1090 (emit-back-patch segment
1092 (lambda (segment posn)
1093 (emit-dword segment (- (label-position label)
1097 (defun emit-ea (segment thing reg &optional allow-constants)
1100 ;; this would be eleganter if we had a function that would create
1102 (ecase (sb-name (sc-sb (tn-sc thing)))
1103 ((registers float-registers)
1104 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1106 ;; Convert stack tns into an index off RBP.
1107 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
1108 (cond ((< -128 disp 127)
1109 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1110 (emit-byte segment disp))
1112 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1113 (emit-dword segment disp)))))
1115 (unless allow-constants
1118 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1119 (emit-constant-tn-rip segment thing reg))))
1121 (let* ((base (ea-base thing))
1122 (index (ea-index thing))
1123 (scale (ea-scale thing))
1124 (disp (ea-disp thing))
1125 (mod (cond ((or (null base)
1127 (not (= (reg-tn-encoding base) #b101))))
1129 ((and (fixnump disp) (<= -128 disp 127))
1133 (r/m (cond (index #b100)
1135 (t (reg-tn-encoding base)))))
1136 (when (and (= mod 0) (= r/m #b101))
1137 ;; this is rip-relative in amd64, so we'll use a sib instead
1138 (setf r/m #b100 scale 1))
1139 (emit-mod-reg-r/m-byte segment mod reg r/m)
1141 (let ((ss (1- (integer-length scale)))
1142 (index (if (null index)
1144 (let ((index (reg-tn-encoding index)))
1146 (error "can't index off of ESP")
1148 (base (if (null base)
1150 (reg-tn-encoding base))))
1151 (emit-sib-byte segment ss index base)))
1153 (emit-byte segment disp))
1154 ((or (= mod #b10) (null base))
1156 (emit-absolute-fixup segment disp)
1157 (emit-dword segment disp))))))
1159 (typecase (fixup-offset thing)
1161 (emit-label-rip segment thing reg))
1163 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1164 (emit-sib-byte segment 0 #b100 #b101)
1165 (emit-absolute-fixup segment thing))))))
1167 (defun fp-reg-tn-p (thing)
1169 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1171 ;;; like the above, but for fp-instructions--jrd
1172 (defun emit-fp-op (segment thing op)
1173 (if (fp-reg-tn-p thing)
1174 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
1177 (emit-ea segment thing op)))
1179 (defun byte-reg-p (thing)
1181 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1182 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1185 (defun byte-ea-p (thing)
1187 (ea (eq (ea-size thing) :byte))
1189 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1192 (defun word-reg-p (thing)
1194 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1195 (member (sc-name (tn-sc thing)) *word-sc-names*)
1198 (defun word-ea-p (thing)
1200 (ea (eq (ea-size thing) :word))
1201 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1204 (defun dword-reg-p (thing)
1206 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1207 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1210 (defun dword-ea-p (thing)
1212 (ea (eq (ea-size thing) :dword))
1214 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1217 (defun qword-reg-p (thing)
1219 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1220 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1223 (defun qword-ea-p (thing)
1225 (ea (eq (ea-size thing) :qword))
1227 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1230 (defun register-p (thing)
1232 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1234 (defun accumulator-p (thing)
1235 (and (register-p thing)
1236 (= (tn-offset thing) 0)))
1241 (def!constant +operand-size-prefix-byte+ #b01100110)
1243 (defun maybe-emit-operand-size-prefix (segment size)
1244 (unless (or (eq size :byte)
1245 (eq size :qword) ; REX prefix handles this
1246 (eq size +default-operand-size+))
1247 (emit-byte segment +operand-size-prefix-byte+)))
1249 ;;; A REX prefix must be emitted if at least one of the following
1250 ;;; conditions is true:
1251 ;; 1. The operand size is :QWORD and the default operand size of the
1252 ;; instruction is not :QWORD.
1253 ;;; 2. The instruction references an extended register.
1254 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1257 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1258 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1259 ;;; this should not happen, for example because the instruction's
1260 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1261 ;;; registers the encodings of which are extended with the REX.R, REX.X
1262 ;;; and REX.B bit, respectively. To determine whether one of the byte
1263 ;;; registers is used that can only be accessed using a REX prefix, we
1264 ;;; need only to test R and B, because X is only used for the index
1265 ;;; register of an effective address and therefore never byte-sized.
1266 ;;; For R we can avoid to calculate the size of the TN because it is
1267 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1268 ;;; B can be address-sized (if it is the base register of an effective
1269 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1270 ;;; registers) or of some different size (in the instructions that
1271 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD).
1272 ;;; We don't distinguish between general purpose and floating point
1273 ;;; registers for this cause because only general purpose registers can
1274 ;;; be byte-sized at all.
1275 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1276 (declare (type (member nil :byte :word :dword :qword :float :double
1279 (type (or null tn) r x b))
1281 (if (and r (> (tn-offset r)
1282 ;; offset of r8 is 16, offset of xmm8 is 8
1289 ;; Assuming R is a TN describing a general purpose
1290 ;; register, return true if it references register
1292 (<= 8 (tn-offset r) 15)))
1293 (let ((rex-w (if (eq operand-size :qword) 1 0))
1297 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1299 (eq operand-size :byte)
1302 (eq (operand-size b) :byte)
1304 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1306 ;;; Emit a REX prefix if necessary. The operand size is determined from
1307 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1308 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1309 ;;; pass its index and base registers, if it is a register TN, we pass
1311 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1312 ;;; be treated specially here: If THING is a stack TN, neither it nor
1313 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1314 ;;; works correctly because stack references always use RBP as the base
1315 ;;; register and never use an index register so no extended registers
1316 ;;; need to be accessed. Fixups are assembled using an addressing mode
1317 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1318 ;;; not reference an extended register. The displacement-only addressing
1319 ;;; mode requires that REX.X is 0, which is ensured here.
1320 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1321 (declare (type (or ea tn fixup) thing)
1322 (type (or null tn) reg)
1323 (type (member nil :byte :word :dword :qword :float :double
1326 (let ((ea-p (ea-p thing)))
1327 (maybe-emit-rex-prefix segment
1328 (or operand-size (operand-size thing))
1330 (and ea-p (ea-index thing))
1331 (cond (ea-p (ea-base thing))
1333 (member (sb-name (sc-sb (tn-sc thing)))
1334 '(float-registers registers)))
1338 (defun operand-size (thing)
1341 ;; FIXME: might as well be COND instead of having to use #. readmacro
1342 ;; to hack up the code
1343 (case (sc-name (tn-sc thing))
1352 ;; added by jrd: float-registers is a separate size (?)
1355 (#.*double-sc-names*
1358 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1362 ;; GNA. Guess who spelt "flavor" correctly first time round?
1363 ;; There's a strong argument in my mind to change all uses of
1364 ;; "flavor" to "kind": and similarly with some misguided uses of
1365 ;; "type" here and there. -- CSR, 2005-01-06.
1366 (case (fixup-flavor thing)
1367 ((:foreign-dataref) :qword)))
1371 (defun matching-operand-size (dst src)
1372 (let ((dst-size (operand-size dst))
1373 (src-size (operand-size src)))
1376 (if (eq dst-size src-size)
1378 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1379 dst dst-size src src-size))
1383 (error "can't tell the size of either ~S or ~S" dst src)))))
1385 (defun emit-sized-immediate (segment size value &optional quad-p)
1388 (emit-byte segment value))
1390 (emit-word segment value))
1392 ;; except in a very few cases (MOV instructions A1,A3,B8) we expect
1393 ;; dword data bytes even when 64 bit work is being done. So, mostly
1394 ;; we treat quad constants as dwords.
1395 (if (and quad-p (eq size :qword))
1396 (emit-qword segment value)
1397 (emit-dword segment value)))))
1399 ;;;; general data transfer
1401 (define-instruction mov (segment dst src)
1402 ;; immediate to register
1403 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1404 '(:name :tab reg ", " imm))
1405 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1406 '(:name :tab reg ", " imm))
1407 ;; absolute mem to/from accumulator
1408 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1409 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1410 ;; register to/from register/memory
1411 (:printer reg-reg/mem-dir ((op #b100010)))
1412 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1413 ;; immediate to register/memory
1414 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1415 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1418 (let ((size (matching-operand-size dst src)))
1419 (maybe-emit-operand-size-prefix segment size)
1420 (cond ((register-p dst)
1421 (cond ((integerp src)
1422 (maybe-emit-rex-prefix segment size nil nil dst)
1423 (emit-byte-with-reg segment
1427 (reg-tn-encoding dst))
1428 (emit-sized-immediate segment size src (eq size :qword)))
1430 (maybe-emit-rex-for-ea segment src dst)
1435 (emit-ea segment src (reg-tn-encoding dst) t))))
1437 ;; C7 only deals with 32 bit immediates even if register is
1438 ;; 64 bit: only b8-bf use 64 bit immediates
1439 (maybe-emit-rex-for-ea segment dst nil)
1440 (cond ((typep src '(or (signed-byte 32) (unsigned-byte 32)))
1442 (if (eq size :byte) #b11000110 #b11000111))
1443 (emit-ea segment dst #b000)
1444 (emit-sized-immediate segment
1445 (case size (:qword :dword) (t size))
1450 (maybe-emit-rex-for-ea segment dst src)
1451 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1452 (emit-ea segment dst (reg-tn-encoding src)))
1454 ;; Generally we can't MOV a fixupped value into an EA, since
1455 ;; MOV on non-registers can only take a 32-bit immediate arg.
1456 ;; Make an exception for :FOREIGN fixups (pretty much just
1457 ;; the runtime asm, since other foreign calls go through the
1458 ;; the linkage table) and for linkage table references, since
1459 ;; these should always end up in low memory.
1460 (aver (or (eq (fixup-flavor src) :foreign)
1461 (eq (fixup-flavor src) :foreign-dataref)
1462 (eq (ea-size dst) :dword)))
1463 (maybe-emit-rex-for-ea segment dst nil)
1464 (emit-byte segment #b11000111)
1465 (emit-ea segment dst #b000)
1466 (emit-absolute-fixup segment src))
1468 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1470 (defun emit-move-with-extension (segment dst src signed-p)
1471 (aver (register-p dst))
1472 (let ((dst-size (operand-size dst))
1473 (src-size (operand-size src))
1474 (opcode (if signed-p #b10111110 #b10110110)))
1477 (aver (eq src-size :byte))
1478 (maybe-emit-operand-size-prefix segment :word)
1479 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1480 (maybe-emit-rex-for-ea segment src dst :operand-size :word)
1481 (emit-byte segment #b00001111)
1482 (emit-byte segment opcode)
1483 (emit-ea segment src (reg-tn-encoding dst)))
1487 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1488 (emit-byte segment #b00001111)
1489 (emit-byte segment opcode)
1490 (emit-ea segment src (reg-tn-encoding dst)))
1492 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1493 (emit-byte segment #b00001111)
1494 (emit-byte segment (logior opcode 1))
1495 (emit-ea segment src (reg-tn-encoding dst)))
1497 (aver (eq dst-size :qword))
1498 ;; dst is in reg, src is in modrm
1499 (let ((ea-p (ea-p src)))
1500 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1501 (and ea-p (ea-index src))
1502 (cond (ea-p (ea-base src))
1505 (emit-byte segment #x63) ;movsxd
1506 ;;(emit-byte segment opcode)
1507 (emit-ea segment src (reg-tn-encoding dst)))))))))
1509 (define-instruction movsx (segment dst src)
1510 (:printer ext-reg-reg/mem-no-width
1511 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1512 (:printer rex-ext-reg-reg/mem-no-width
1513 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1514 (:printer ext-reg-reg/mem-no-width
1515 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1516 (:printer rex-ext-reg-reg/mem-no-width
1517 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1518 (:emitter (emit-move-with-extension segment dst src :signed)))
1520 (define-instruction movzx (segment dst src)
1521 (:printer ext-reg-reg/mem-no-width
1522 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1523 (:printer rex-ext-reg-reg/mem-no-width
1524 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1525 (:printer ext-reg-reg/mem-no-width
1526 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1527 (:printer rex-ext-reg-reg/mem-no-width
1528 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1529 (:emitter (emit-move-with-extension segment dst src nil)))
1531 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1532 ;;; sign-extends the dword source into the qword destination register.
1533 ;;; If the operand size is :dword the instruction zero-extends the dword
1534 ;;; source into the qword destination register, i.e. it does the same as
1535 ;;; a dword MOV into a register.
1536 (define-instruction movsxd (segment dst src)
1537 (:printer reg-reg/mem ((op #b0110001) (width 1)
1538 (reg/mem nil :type 'sized-dword-reg/mem)))
1539 (:printer rex-reg-reg/mem ((op #b0110001) (width 1)
1540 (reg/mem nil :type 'sized-dword-reg/mem)))
1541 (:emitter (emit-move-with-extension segment dst src :signed)))
1543 ;;; this is not a real amd64 instruction, of course
1544 (define-instruction movzxd (segment dst src)
1545 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1546 (:emitter (emit-move-with-extension segment dst src nil)))
1548 (define-instruction push (segment src)
1550 (:printer reg-no-width-default-qword ((op #b01010)))
1551 (:printer rex-reg-no-width-default-qword ((op #b01010)))
1553 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1554 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b110))))
1556 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1558 (:printer byte ((op #b01101000)
1559 (imm nil :type 'signed-imm-data-default-qword))
1561 ;; ### segment registers?
1564 (cond ((integerp src)
1565 (cond ((<= -128 src 127)
1566 (emit-byte segment #b01101010)
1567 (emit-byte segment src))
1569 ;; A REX-prefix is not needed because the operand size
1570 ;; defaults to 64 bits. The size of the immediate is 32
1571 ;; bits and it is sign-extended.
1572 (emit-byte segment #b01101000)
1573 (emit-dword segment src))))
1575 (let ((size (operand-size src)))
1576 (aver (not (eq size :byte)))
1577 (maybe-emit-operand-size-prefix segment size)
1578 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1579 (cond ((register-p src)
1580 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1582 (emit-byte segment #b11111111)
1583 (emit-ea segment src #b110 t))))))))
1585 (define-instruction pop (segment dst)
1586 (:printer reg-no-width-default-qword ((op #b01011)))
1587 (:printer rex-reg-no-width-default-qword ((op #b01011)))
1588 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1589 (:printer rex-reg/mem-default-qword ((op '(#b10001111 #b000))))
1591 (let ((size (operand-size dst)))
1592 (aver (not (eq size :byte)))
1593 (maybe-emit-operand-size-prefix segment size)
1594 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1595 (cond ((register-p dst)
1596 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1598 (emit-byte segment #b10001111)
1599 (emit-ea segment dst #b000))))))
1601 (define-instruction xchg (segment operand1 operand2)
1602 ;; Register with accumulator.
1603 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1604 ;; Register/Memory with Register.
1605 (:printer reg-reg/mem ((op #b1000011)))
1606 (:printer rex-reg-reg/mem ((op #b1000011)))
1608 (let ((size (matching-operand-size operand1 operand2)))
1609 (maybe-emit-operand-size-prefix segment size)
1610 (labels ((xchg-acc-with-something (acc something)
1611 (if (and (not (eq size :byte)) (register-p something))
1613 (maybe-emit-rex-for-ea segment acc something)
1614 (emit-byte-with-reg segment
1616 (reg-tn-encoding something)))
1617 (xchg-reg-with-something acc something)))
1618 (xchg-reg-with-something (reg something)
1619 (maybe-emit-rex-for-ea segment something reg)
1620 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1621 (emit-ea segment something (reg-tn-encoding reg))))
1622 (cond ((accumulator-p operand1)
1623 (xchg-acc-with-something operand1 operand2))
1624 ((accumulator-p operand2)
1625 (xchg-acc-with-something operand2 operand1))
1626 ((register-p operand1)
1627 (xchg-reg-with-something operand1 operand2))
1628 ((register-p operand2)
1629 (xchg-reg-with-something operand2 operand1))
1631 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1633 (define-instruction lea (segment dst src)
1634 (:printer rex-reg-reg/mem ((op #b1000110)))
1635 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1637 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1638 (maybe-emit-rex-for-ea segment src dst
1639 :operand-size :qword)
1640 (emit-byte segment #b10001101)
1641 (emit-ea segment src (reg-tn-encoding dst))))
1643 (define-instruction cmpxchg (segment dst src)
1644 ;; Register/Memory with Register.
1645 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1647 (aver (register-p src))
1648 (let ((size (matching-operand-size src dst)))
1649 (maybe-emit-operand-size-prefix segment size)
1650 (maybe-emit-rex-for-ea segment dst src)
1651 (emit-byte segment #b00001111)
1652 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1653 (emit-ea segment dst (reg-tn-encoding src)))))
1657 (define-instruction fs-segment-prefix (segment)
1659 (emit-byte segment #x64)))
1661 ;;;; flag control instructions
1663 ;;; CLC -- Clear Carry Flag.
1664 (define-instruction clc (segment)
1665 (:printer byte ((op #b11111000)))
1667 (emit-byte segment #b11111000)))
1669 ;;; CLD -- Clear Direction Flag.
1670 (define-instruction cld (segment)
1671 (:printer byte ((op #b11111100)))
1673 (emit-byte segment #b11111100)))
1675 ;;; CLI -- Clear Iterrupt Enable Flag.
1676 (define-instruction cli (segment)
1677 (:printer byte ((op #b11111010)))
1679 (emit-byte segment #b11111010)))
1681 ;;; CMC -- Complement Carry Flag.
1682 (define-instruction cmc (segment)
1683 (:printer byte ((op #b11110101)))
1685 (emit-byte segment #b11110101)))
1687 ;;; LAHF -- Load AH into flags.
1688 (define-instruction lahf (segment)
1689 (:printer byte ((op #b10011111)))
1691 (emit-byte segment #b10011111)))
1693 ;;; POPF -- Pop flags.
1694 (define-instruction popf (segment)
1695 (:printer byte ((op #b10011101)))
1697 (emit-byte segment #b10011101)))
1699 ;;; PUSHF -- push flags.
1700 (define-instruction pushf (segment)
1701 (:printer byte ((op #b10011100)))
1703 (emit-byte segment #b10011100)))
1705 ;;; SAHF -- Store AH into flags.
1706 (define-instruction sahf (segment)
1707 (:printer byte ((op #b10011110)))
1709 (emit-byte segment #b10011110)))
1711 ;;; STC -- Set Carry Flag.
1712 (define-instruction stc (segment)
1713 (:printer byte ((op #b11111001)))
1715 (emit-byte segment #b11111001)))
1717 ;;; STD -- Set Direction Flag.
1718 (define-instruction std (segment)
1719 (:printer byte ((op #b11111101)))
1721 (emit-byte segment #b11111101)))
1723 ;;; STI -- Set Interrupt Enable Flag.
1724 (define-instruction sti (segment)
1725 (:printer byte ((op #b11111011)))
1727 (emit-byte segment #b11111011)))
1731 (defun emit-random-arith-inst (name segment dst src opcode
1732 &optional allow-constants)
1733 (let ((size (matching-operand-size dst src)))
1734 (maybe-emit-operand-size-prefix segment size)
1737 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1738 (maybe-emit-rex-for-ea segment dst nil)
1739 (emit-byte segment #b10000011)
1740 (emit-ea segment dst opcode allow-constants)
1741 (emit-byte segment src))
1742 ((accumulator-p dst)
1743 (maybe-emit-rex-for-ea segment dst nil)
1750 (emit-sized-immediate segment size src))
1752 (maybe-emit-rex-for-ea segment dst nil)
1753 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1754 (emit-ea segment dst opcode allow-constants)
1755 (emit-sized-immediate segment size src))))
1757 (maybe-emit-rex-for-ea segment dst src)
1761 (if (eq size :byte) #b00000000 #b00000001)))
1762 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1764 (maybe-emit-rex-for-ea segment src dst)
1768 (if (eq size :byte) #b00000010 #b00000011)))
1769 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1771 (error "bogus operands to ~A" name)))))
1773 (eval-when (:compile-toplevel :execute)
1774 (defun arith-inst-printer-list (subop)
1775 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1776 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1777 (reg/mem-imm ((op (#b1000000 ,subop))))
1778 (rex-reg/mem-imm ((op (#b1000000 ,subop))))
1779 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1780 ;; therefore we force WIDTH to 1.
1781 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1782 (imm nil :type signed-imm-byte)))
1783 (rex-reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1784 (imm nil :type signed-imm-byte)))
1785 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
1786 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1789 (define-instruction add (segment dst src)
1790 (:printer-list (arith-inst-printer-list #b000))
1791 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1793 (define-instruction adc (segment dst src)
1794 (:printer-list (arith-inst-printer-list #b010))
1795 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1797 (define-instruction sub (segment dst src)
1798 (:printer-list (arith-inst-printer-list #b101))
1799 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1801 (define-instruction sbb (segment dst src)
1802 (:printer-list (arith-inst-printer-list #b011))
1803 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1805 (define-instruction cmp (segment dst src)
1806 (:printer-list (arith-inst-printer-list #b111))
1807 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1809 (define-instruction inc (segment dst)
1811 (:printer modrm-reg-no-width ((modrm-reg #b000)))
1813 ;; (:printer rex-reg/mem ((op '(#b11111111 #b001))))
1814 (:printer reg/mem ((op '(#b1111111 #b000))))
1816 (let ((size (operand-size dst)))
1817 (maybe-emit-operand-size-prefix segment size)
1818 (cond #+nil ; these opcodes become REX prefixes in x86-64
1819 ((and (not (eq size :byte)) (register-p dst))
1820 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1822 (maybe-emit-rex-for-ea segment dst nil)
1823 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1824 (emit-ea segment dst #b000))))))
1826 (define-instruction dec (segment dst)
1828 (:printer modrm-reg-no-width ((modrm-reg #b001)))
1830 (:printer reg/mem ((op '(#b1111111 #b001))))
1832 (let ((size (operand-size dst)))
1833 (maybe-emit-operand-size-prefix segment size)
1835 ((and (not (eq size :byte)) (register-p dst))
1836 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1838 (maybe-emit-rex-for-ea segment dst nil)
1839 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1840 (emit-ea segment dst #b001))))))
1842 (define-instruction neg (segment dst)
1843 (:printer reg/mem ((op '(#b1111011 #b011))))
1844 (:printer rex-reg/mem ((op '(#b1111011 #b011))))
1846 (let ((size (operand-size dst)))
1847 (maybe-emit-operand-size-prefix segment size)
1848 (maybe-emit-rex-for-ea segment dst nil)
1849 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1850 (emit-ea segment dst #b011))))
1852 (define-instruction mul (segment dst src)
1853 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1854 (:printer rex-accum-reg/mem ((op '(#b1111011 #b100))))
1856 (let ((size (matching-operand-size dst src)))
1857 (aver (accumulator-p dst))
1858 (maybe-emit-operand-size-prefix segment size)
1859 (maybe-emit-rex-for-ea segment src nil)
1860 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1861 (emit-ea segment src #b100))))
1863 (define-instruction imul (segment dst &optional src1 src2)
1864 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1865 (:printer rex-accum-reg/mem ((op '(#b1111011 #b101))))
1866 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
1867 (:printer rex-ext-reg-reg/mem-no-width ((op #b10101111)))
1868 (:printer reg-reg/mem ((op #b0110100) (width 1)
1869 (imm nil :type 'signed-imm-data))
1870 '(:name :tab reg ", " reg/mem ", " imm))
1871 (:printer rex-reg-reg/mem ((op #b0110100) (width 1)
1872 (imm nil :type 'signed-imm-data))
1873 '(:name :tab reg ", " reg/mem ", " imm))
1874 (:printer reg-reg/mem ((op #b0110101) (width 1)
1875 (imm nil :type 'signed-imm-byte))
1876 '(:name :tab reg ", " reg/mem ", " imm))
1877 (:printer rex-reg-reg/mem ((op #b0110101) (width 1)
1878 (imm nil :type 'signed-imm-byte))
1879 '(:name :tab reg ", " reg/mem ", " imm))
1881 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1882 (let* ((size (matching-operand-size reg r/m))
1883 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1884 (maybe-emit-operand-size-prefix segment size)
1885 (maybe-emit-rex-for-ea segment r/m reg)
1886 (emit-byte segment (if sx #b01101011 #b01101001))
1887 (emit-ea segment r/m (reg-tn-encoding reg))
1889 (emit-byte segment immed)
1890 (emit-sized-immediate segment size immed)))))
1892 (r/m-with-immed-to-reg dst src1 src2))
1895 (r/m-with-immed-to-reg dst dst src1)
1896 (let ((size (matching-operand-size dst src1)))
1897 (maybe-emit-operand-size-prefix segment size)
1898 (maybe-emit-rex-for-ea segment src1 dst)
1899 (emit-byte segment #b00001111)
1900 (emit-byte segment #b10101111)
1901 (emit-ea segment src1 (reg-tn-encoding dst)))))
1903 (let ((size (operand-size dst)))
1904 (maybe-emit-operand-size-prefix segment size)
1905 (maybe-emit-rex-for-ea segment dst nil)
1906 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1907 (emit-ea segment dst #b101)))))))
1909 (define-instruction div (segment dst src)
1910 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1911 (:printer rex-accum-reg/mem ((op '(#b1111011 #b110))))
1913 (let ((size (matching-operand-size dst src)))
1914 (aver (accumulator-p dst))
1915 (maybe-emit-operand-size-prefix segment size)
1916 (maybe-emit-rex-for-ea segment src nil)
1917 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1918 (emit-ea segment src #b110))))
1920 (define-instruction idiv (segment dst src)
1921 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1922 (:printer rex-accum-reg/mem ((op '(#b1111011 #b111))))
1924 (let ((size (matching-operand-size dst src)))
1925 (aver (accumulator-p dst))
1926 (maybe-emit-operand-size-prefix segment size)
1927 (maybe-emit-rex-for-ea segment src nil)
1928 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1929 (emit-ea segment src #b111))))
1931 (define-instruction bswap (segment dst)
1932 (:printer ext-reg-no-width ((op #b11001)))
1934 (let ((size (operand-size dst)))
1935 (maybe-emit-rex-prefix segment size nil nil dst)
1936 (emit-byte segment #x0f)
1937 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
1939 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1940 (define-instruction cbw (segment)
1941 (:printer x66-byte ((op #b10011000)))
1943 (maybe-emit-operand-size-prefix segment :word)
1944 (emit-byte segment #b10011000)))
1946 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
1947 (define-instruction cwde (segment)
1948 (:printer byte ((op #b10011000)))
1950 (maybe-emit-operand-size-prefix segment :dword)
1951 (emit-byte segment #b10011000)))
1953 ;;; CDQE -- Convert Word To Double Word Extended. RAX <- sign_xtnd(EAX)
1954 (define-instruction cdqe (segment)
1955 (:printer rex-byte ((op #b10011000)))
1957 (maybe-emit-rex-prefix segment :qword nil nil nil)
1958 (emit-byte segment #b10011000)))
1960 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1961 (define-instruction cwd (segment)
1962 (:printer x66-byte ((op #b10011001)))
1964 (maybe-emit-operand-size-prefix segment :word)
1965 (emit-byte segment #b10011001)))
1967 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1968 (define-instruction cdq (segment)
1969 (:printer byte ((op #b10011001)))
1971 (maybe-emit-operand-size-prefix segment :dword)
1972 (emit-byte segment #b10011001)))
1974 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
1975 (define-instruction cqo (segment)
1976 (:printer rex-byte ((op #b10011001)))
1978 (maybe-emit-rex-prefix segment :qword nil nil nil)
1979 (emit-byte segment #b10011001)))
1981 (define-instruction xadd (segment dst src)
1982 ;; Register/Memory with Register.
1983 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1985 (aver (register-p src))
1986 (let ((size (matching-operand-size src dst)))
1987 (maybe-emit-operand-size-prefix segment size)
1988 (maybe-emit-rex-for-ea segment dst src)
1989 (emit-byte segment #b00001111)
1990 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
1991 (emit-ea segment dst (reg-tn-encoding src)))))
1996 (defun emit-shift-inst (segment dst amount opcode)
1997 (let ((size (operand-size dst)))
1998 (maybe-emit-operand-size-prefix segment size)
1999 (multiple-value-bind (major-opcode immed)
2001 (:cl (values #b11010010 nil))
2002 (1 (values #b11010000 nil))
2003 (t (values #b11000000 t)))
2004 (maybe-emit-rex-for-ea segment dst nil)
2006 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2007 (emit-ea segment dst opcode)
2009 (emit-byte segment amount)))))
2011 (eval-when (:compile-toplevel :execute)
2012 (defun shift-inst-printer-list (subop)
2013 `((reg/mem ((op (#b1101000 ,subop)))
2014 (:name :tab reg/mem ", 1"))
2015 (rex-reg/mem ((op (#b1101000 ,subop)))
2016 (:name :tab reg/mem ", 1"))
2017 (reg/mem ((op (#b1101001 ,subop)))
2018 (:name :tab reg/mem ", " 'cl))
2019 (rex-reg/mem ((op (#b1101001 ,subop)))
2020 (:name :tab reg/mem ", " 'cl))
2021 (reg/mem-imm ((op (#b1100000 ,subop))
2022 (imm nil :type imm-byte)))
2023 (rex-reg/mem-imm ((op (#b1100000 ,subop))
2024 (imm nil :type imm-byte))))))
2026 (define-instruction rol (segment dst amount)
2028 (shift-inst-printer-list #b000))
2030 (emit-shift-inst segment dst amount #b000)))
2032 (define-instruction ror (segment dst amount)
2034 (shift-inst-printer-list #b001))
2036 (emit-shift-inst segment dst amount #b001)))
2038 (define-instruction rcl (segment dst amount)
2040 (shift-inst-printer-list #b010))
2042 (emit-shift-inst segment dst amount #b010)))
2044 (define-instruction rcr (segment dst amount)
2046 (shift-inst-printer-list #b011))
2048 (emit-shift-inst segment dst amount #b011)))
2050 (define-instruction shl (segment dst amount)
2052 (shift-inst-printer-list #b100))
2054 (emit-shift-inst segment dst amount #b100)))
2056 (define-instruction shr (segment dst amount)
2058 (shift-inst-printer-list #b101))
2060 (emit-shift-inst segment dst amount #b101)))
2062 (define-instruction sar (segment dst amount)
2064 (shift-inst-printer-list #b111))
2066 (emit-shift-inst segment dst amount #b111)))
2068 (defun emit-double-shift (segment opcode dst src amt)
2069 (let ((size (matching-operand-size dst src)))
2070 (when (eq size :byte)
2071 (error "Double shifts can only be used with words."))
2072 (maybe-emit-operand-size-prefix segment size)
2073 (maybe-emit-rex-for-ea segment dst src)
2074 (emit-byte segment #b00001111)
2075 (emit-byte segment (dpb opcode (byte 1 3)
2076 (if (eq amt :cl) #b10100101 #b10100100)))
2077 (emit-ea segment dst (reg-tn-encoding src))
2078 (unless (eq amt :cl)
2079 (emit-byte segment amt))))
2081 (eval-when (:compile-toplevel :execute)
2082 (defun double-shift-inst-printer-list (op)
2084 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
2085 (imm nil :type signed-imm-byte)))
2086 (ext-reg-reg/mem ((op ,(logior op #b101)))
2087 (:name :tab reg/mem ", " 'cl)))))
2089 (define-instruction shld (segment dst src amt)
2090 (:declare (type (or (member :cl) (mod 32)) amt))
2091 (:printer-list (double-shift-inst-printer-list #b10100000))
2093 (emit-double-shift segment #b0 dst src amt)))
2095 (define-instruction shrd (segment dst src amt)
2096 (:declare (type (or (member :cl) (mod 32)) amt))
2097 (:printer-list (double-shift-inst-printer-list #b10101000))
2099 (emit-double-shift segment #b1 dst src amt)))
2101 (define-instruction and (segment dst src)
2103 (arith-inst-printer-list #b100))
2105 (emit-random-arith-inst "AND" segment dst src #b100)))
2107 (define-instruction test (segment this that)
2108 (:printer accum-imm ((op #b1010100)))
2109 (:printer rex-accum-imm ((op #b1010100)))
2110 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2111 (:printer rex-reg/mem-imm ((op '(#b1111011 #b000))))
2112 (:printer reg-reg/mem ((op #b1000010)))
2113 (:printer rex-reg-reg/mem ((op #b1000010)))
2115 (let ((size (matching-operand-size this that)))
2116 (maybe-emit-operand-size-prefix segment size)
2117 (flet ((test-immed-and-something (immed something)
2118 (cond ((accumulator-p something)
2119 (maybe-emit-rex-for-ea segment something nil)
2121 (if (eq size :byte) #b10101000 #b10101001))
2122 (emit-sized-immediate segment size immed))
2124 (maybe-emit-rex-for-ea segment something nil)
2126 (if (eq size :byte) #b11110110 #b11110111))
2127 (emit-ea segment something #b000)
2128 (emit-sized-immediate segment size immed))))
2129 (test-reg-and-something (reg something)
2130 (maybe-emit-rex-for-ea segment something reg)
2131 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2132 (emit-ea segment something (reg-tn-encoding reg))))
2133 (cond ((integerp that)
2134 (test-immed-and-something that this))
2136 (test-immed-and-something this that))
2138 (test-reg-and-something this that))
2140 (test-reg-and-something that this))
2142 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2144 (define-instruction or (segment dst src)
2146 (arith-inst-printer-list #b001))
2148 (emit-random-arith-inst "OR" segment dst src #b001)))
2150 (define-instruction xor (segment dst src)
2152 (arith-inst-printer-list #b110))
2154 (emit-random-arith-inst "XOR" segment dst src #b110)))
2156 (define-instruction not (segment dst)
2157 (:printer reg/mem ((op '(#b1111011 #b010))))
2158 (:printer rex-reg/mem ((op '(#b1111011 #b010))))
2160 (let ((size (operand-size dst)))
2161 (maybe-emit-operand-size-prefix segment size)
2162 (maybe-emit-rex-for-ea segment dst nil)
2163 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2164 (emit-ea segment dst #b010))))
2166 ;;;; string manipulation
2168 (define-instruction cmps (segment size)
2169 (:printer string-op ((op #b1010011)))
2170 (:printer rex-string-op ((op #b1010011)))
2172 (maybe-emit-operand-size-prefix segment size)
2173 (maybe-emit-rex-prefix segment size nil nil nil)
2174 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2176 (define-instruction ins (segment acc)
2177 (:printer string-op ((op #b0110110)))
2178 (:printer rex-string-op ((op #b0110110)))
2180 (let ((size (operand-size acc)))
2181 (aver (accumulator-p acc))
2182 (maybe-emit-operand-size-prefix segment size)
2183 (maybe-emit-rex-prefix segment size nil nil nil)
2184 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2186 (define-instruction lods (segment acc)
2187 (:printer string-op ((op #b1010110)))
2188 (:printer rex-string-op ((op #b1010110)))
2190 (let ((size (operand-size acc)))
2191 (aver (accumulator-p acc))
2192 (maybe-emit-operand-size-prefix segment size)
2193 (maybe-emit-rex-prefix segment size nil nil nil)
2194 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2196 (define-instruction movs (segment size)
2197 (:printer string-op ((op #b1010010)))
2198 (:printer rex-string-op ((op #b1010010)))
2200 (maybe-emit-operand-size-prefix segment size)
2201 (maybe-emit-rex-prefix segment size nil nil nil)
2202 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2204 (define-instruction outs (segment acc)
2205 (:printer string-op ((op #b0110111)))
2206 (:printer rex-string-op ((op #b0110111)))
2208 (let ((size (operand-size acc)))
2209 (aver (accumulator-p acc))
2210 (maybe-emit-operand-size-prefix segment size)
2211 (maybe-emit-rex-prefix segment size nil nil nil)
2212 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2214 (define-instruction scas (segment acc)
2215 (:printer string-op ((op #b1010111)))
2216 (:printer rex-string-op ((op #b1010111)))
2218 (let ((size (operand-size acc)))
2219 (aver (accumulator-p acc))
2220 (maybe-emit-operand-size-prefix segment size)
2221 (maybe-emit-rex-prefix segment size nil nil nil)
2222 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2224 (define-instruction stos (segment acc)
2225 (:printer string-op ((op #b1010101)))
2226 (:printer rex-string-op ((op #b1010101)))
2228 (let ((size (operand-size acc)))
2229 (aver (accumulator-p acc))
2230 (maybe-emit-operand-size-prefix segment size)
2231 (maybe-emit-rex-prefix segment size nil nil nil)
2232 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2234 (define-instruction xlat (segment)
2235 (:printer byte ((op #b11010111)))
2237 (emit-byte segment #b11010111)))
2239 (define-instruction rep (segment)
2241 (emit-byte segment #b11110010)))
2243 (define-instruction repe (segment)
2244 (:printer byte ((op #b11110011)))
2246 (emit-byte segment #b11110011)))
2248 (define-instruction repne (segment)
2249 (:printer byte ((op #b11110010)))
2251 (emit-byte segment #b11110010)))
2254 ;;;; bit manipulation
2256 (define-instruction bsf (segment dst src)
2257 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2258 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111100)))
2260 (let ((size (matching-operand-size dst src)))
2261 (when (eq size :byte)
2262 (error "can't scan bytes: ~S" src))
2263 (maybe-emit-operand-size-prefix segment size)
2264 (maybe-emit-rex-for-ea segment src dst)
2265 (emit-byte segment #b00001111)
2266 (emit-byte segment #b10111100)
2267 (emit-ea segment src (reg-tn-encoding dst)))))
2269 (define-instruction bsr (segment dst src)
2270 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2271 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111101)))
2273 (let ((size (matching-operand-size dst src)))
2274 (when (eq size :byte)
2275 (error "can't scan bytes: ~S" src))
2276 (maybe-emit-operand-size-prefix segment size)
2277 (maybe-emit-rex-for-ea segment src dst)
2278 (emit-byte segment #b00001111)
2279 (emit-byte segment #b10111101)
2280 (emit-ea segment src (reg-tn-encoding dst)))))
2282 (defun emit-bit-test-and-mumble (segment src index opcode)
2283 (let ((size (operand-size src)))
2284 (when (eq size :byte)
2285 (error "can't scan bytes: ~S" src))
2286 (maybe-emit-operand-size-prefix segment size)
2287 (cond ((integerp index)
2288 (maybe-emit-rex-for-ea segment src nil)
2289 (emit-byte segment #b00001111)
2290 (emit-byte segment #b10111010)
2291 (emit-ea segment src opcode)
2292 (emit-byte segment index))
2294 (maybe-emit-rex-for-ea segment src index)
2295 (emit-byte segment #b00001111)
2296 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2297 (emit-ea segment src (reg-tn-encoding index))))))
2299 (eval-when (:compile-toplevel :execute)
2300 (defun bit-test-inst-printer-list (subop)
2301 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2302 (reg/mem nil :type reg/mem)
2303 (imm nil :type imm-byte)
2305 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2307 (:name :tab reg/mem ", " reg)))))
2309 (define-instruction bt (segment src index)
2310 (:printer-list (bit-test-inst-printer-list #b100))
2312 (emit-bit-test-and-mumble segment src index #b100)))
2314 (define-instruction btc (segment src index)
2315 (:printer-list (bit-test-inst-printer-list #b111))
2317 (emit-bit-test-and-mumble segment src index #b111)))
2319 (define-instruction btr (segment src index)
2320 (:printer-list (bit-test-inst-printer-list #b110))
2322 (emit-bit-test-and-mumble segment src index #b110)))
2324 (define-instruction bts (segment src index)
2325 (:printer-list (bit-test-inst-printer-list #b101))
2327 (emit-bit-test-and-mumble segment src index #b101)))
2330 ;;;; control transfer
2332 (define-instruction call (segment where)
2333 (:printer near-jump ((op #b11101000)))
2334 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2335 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b010))))
2339 (emit-byte segment #b11101000) ; 32 bit relative
2340 (emit-back-patch segment
2342 (lambda (segment posn)
2344 (- (label-position where)
2347 (emit-byte segment #b11101000)
2348 (emit-relative-fixup segment where))
2350 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2351 (emit-byte segment #b11111111)
2352 (emit-ea segment where #b010)))))
2354 (defun emit-byte-displacement-backpatch (segment target)
2355 (emit-back-patch segment
2357 (lambda (segment posn)
2358 (let ((disp (- (label-position target) (1+ posn))))
2359 (aver (<= -128 disp 127))
2360 (emit-byte segment disp)))))
2362 (define-instruction jmp (segment cond &optional where)
2363 ;; conditional jumps
2364 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2365 (:printer near-cond-jump () '('j cc :tab label))
2366 ;; unconditional jumps
2367 (:printer short-jump ((op #b1011)))
2368 (:printer near-jump ((op #b11101001)) )
2369 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2370 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b100))))
2375 (lambda (segment posn delta-if-after)
2376 (let ((disp (- (label-position where posn delta-if-after)
2378 (when (<= -128 disp 127)
2380 (dpb (conditional-opcode cond)
2383 (emit-byte-displacement-backpatch segment where)
2385 (lambda (segment posn)
2386 (let ((disp (- (label-position where) (+ posn 6))))
2387 (emit-byte segment #b00001111)
2389 (dpb (conditional-opcode cond)
2392 (emit-dword segment disp)))))
2393 ((label-p (setq where cond))
2396 (lambda (segment posn delta-if-after)
2397 (let ((disp (- (label-position where posn delta-if-after)
2399 (when (<= -128 disp 127)
2400 (emit-byte segment #b11101011)
2401 (emit-byte-displacement-backpatch segment where)
2403 (lambda (segment posn)
2404 (let ((disp (- (label-position where) (+ posn 5))))
2405 (emit-byte segment #b11101001)
2406 (emit-dword segment disp)))))
2408 (emit-byte segment #b11101001)
2409 (emit-relative-fixup segment where))
2411 (unless (or (ea-p where) (tn-p where))
2412 (error "don't know what to do with ~A" where))
2413 ;; near jump defaults to 64 bit
2414 ;; w-bit in rex prefix is unnecessary
2415 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2416 (emit-byte segment #b11111111)
2417 (emit-ea segment where #b100)))))
2419 (define-instruction jmp-short (segment label)
2421 (emit-byte segment #b11101011)
2422 (emit-byte-displacement-backpatch segment label)))
2424 (define-instruction ret (segment &optional stack-delta)
2425 (:printer byte ((op #b11000011)))
2426 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2430 (emit-byte segment #b11000010)
2431 (emit-word segment stack-delta))
2433 (emit-byte segment #b11000011)))))
2435 (define-instruction jecxz (segment target)
2436 (:printer short-jump ((op #b0011)))
2438 (emit-byte segment #b11100011)
2439 (emit-byte-displacement-backpatch segment target)))
2441 (define-instruction loop (segment target)
2442 (:printer short-jump ((op #b0010)))
2444 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2445 (emit-byte-displacement-backpatch segment target)))
2447 (define-instruction loopz (segment target)
2448 (:printer short-jump ((op #b0001)))
2450 (emit-byte segment #b11100001)
2451 (emit-byte-displacement-backpatch segment target)))
2453 (define-instruction loopnz (segment target)
2454 (:printer short-jump ((op #b0000)))
2456 (emit-byte segment #b11100000)
2457 (emit-byte-displacement-backpatch segment target)))
2459 ;;;; conditional move
2460 (define-instruction cmov (segment cond dst src)
2461 (:printer cond-move ())
2462 (:printer rex-cond-move ())
2464 (aver (register-p dst))
2465 (let ((size (matching-operand-size dst src)))
2466 (aver (or (eq size :word) (eq size :dword) (eq size :qword) ))
2467 (maybe-emit-operand-size-prefix segment size))
2468 (maybe-emit-rex-for-ea segment src dst)
2469 (emit-byte segment #b00001111)
2470 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2471 (emit-ea segment src (reg-tn-encoding dst))))
2473 ;;;; conditional byte set
2475 (define-instruction set (segment dst cond)
2476 (:printer cond-set ())
2478 (maybe-emit-rex-for-ea segment dst nil)
2479 (emit-byte segment #b00001111)
2480 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2481 (emit-ea segment dst #b000)))
2485 (define-instruction enter (segment disp &optional (level 0))
2486 (:declare (type (unsigned-byte 16) disp)
2487 (type (unsigned-byte 8) level))
2488 (:printer enter-format ((op #b11001000)))
2490 (emit-byte segment #b11001000)
2491 (emit-word segment disp)
2492 (emit-byte segment level)))
2494 (define-instruction leave (segment)
2495 (:printer byte ((op #b11001001)))
2497 (emit-byte segment #b11001001)))
2499 ;;;; interrupt instructions
2501 (defun snarf-error-junk (sap offset &optional length-only)
2502 (let* ((length (sb!sys:sap-ref-8 sap offset))
2503 (vector (make-array length :element-type '(unsigned-byte 8))))
2504 (declare (type sb!sys:system-area-pointer sap)
2505 (type (unsigned-byte 8) length)
2506 (type (simple-array (unsigned-byte 8) (*)) vector))
2508 (values 0 (1+ length) nil nil))
2510 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2512 (collect ((sc-offsets)
2514 (lengths 1) ; the length byte
2516 (error-number (sb!c:read-var-integer vector index)))
2519 (when (>= index length)
2521 (let ((old-index index))
2522 (sc-offsets (sb!c:read-var-integer vector index))
2523 (lengths (- index old-index))))
2524 (values error-number
2530 (defmacro break-cases (breaknum &body cases)
2531 (let ((bn-temp (gensym)))
2532 (collect ((clauses))
2533 (dolist (case cases)
2534 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2535 `(let ((,bn-temp ,breaknum))
2536 (cond ,@(clauses))))))
2539 (defun break-control (chunk inst stream dstate)
2540 (declare (ignore inst))
2541 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2542 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2543 ;; map has it undefined; and it should be easier to look in the target
2544 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2545 ;; from first principles whether it's defined in some way that genesis
2547 (case (byte-imm-code chunk dstate)
2550 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2553 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2555 (nt "breakpoint trap"))
2556 (#.pending-interrupt-trap
2557 (nt "pending interrupt trap"))
2560 (#.fun-end-breakpoint-trap
2561 (nt "function end breakpoint trap")))))
2563 (define-instruction break (segment code)
2564 (:declare (type (unsigned-byte 8) code))
2565 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2566 :control #'break-control)
2568 (emit-byte segment #b11001100)
2569 (emit-byte segment code)))
2571 (define-instruction int (segment number)
2572 (:declare (type (unsigned-byte 8) number))
2573 (:printer byte-imm ((op #b11001101)))
2577 (emit-byte segment #b11001100))
2579 (emit-byte segment #b11001101)
2580 (emit-byte segment number)))))
2582 (define-instruction into (segment)
2583 (:printer byte ((op #b11001110)))
2585 (emit-byte segment #b11001110)))
2587 (define-instruction bound (segment reg bounds)
2589 (let ((size (matching-operand-size reg bounds)))
2590 (when (eq size :byte)
2591 (error "can't bounds-test bytes: ~S" reg))
2592 (maybe-emit-operand-size-prefix segment size)
2593 (maybe-emit-rex-for-ea segment bounds reg)
2594 (emit-byte segment #b01100010)
2595 (emit-ea segment bounds (reg-tn-encoding reg)))))
2597 (define-instruction iret (segment)
2598 (:printer byte ((op #b11001111)))
2600 (emit-byte segment #b11001111)))
2602 ;;;; processor control
2604 (define-instruction hlt (segment)
2605 (:printer byte ((op #b11110100)))
2607 (emit-byte segment #b11110100)))
2609 (define-instruction nop (segment)
2610 (:printer byte ((op #b10010000)))
2612 (emit-byte segment #b10010000)))
2614 (define-instruction wait (segment)
2615 (:printer byte ((op #b10011011)))
2617 (emit-byte segment #b10011011)))
2619 (define-instruction lock (segment)
2620 (:printer byte ((op #b11110000)))
2622 (emit-byte segment #b11110000)))
2624 ;;;; miscellaneous hackery
2626 (define-instruction byte (segment byte)
2628 (emit-byte segment byte)))
2630 (define-instruction word (segment word)
2632 (emit-word segment word)))
2634 (define-instruction dword (segment dword)
2636 (emit-dword segment dword)))
2638 (defun emit-header-data (segment type)
2639 (emit-back-patch segment
2641 (lambda (segment posn)
2645 (component-header-length))
2649 (define-instruction simple-fun-header-word (segment)
2651 (emit-header-data segment simple-fun-header-widetag)))
2653 (define-instruction lra-header-word (segment)
2655 (emit-header-data segment return-pc-header-widetag)))
2657 ;;;; fp instructions
2659 ;;;; Note: We treat the single-precision and double-precision variants
2660 ;;;; as separate instructions.
2662 ;;; Load single to st(0).
2663 (define-instruction fld (segment source)
2664 (:printer floating-point ((op '(#b001 #b000))))
2666 (and (not (fp-reg-tn-p source))
2667 (maybe-emit-rex-for-ea segment source nil))
2668 (emit-byte segment #b11011001)
2669 (emit-fp-op segment source #b000)))
2671 ;;; Load double to st(0).
2672 (define-instruction fldd (segment source)
2673 (:printer floating-point ((op '(#b101 #b000))))
2674 (:printer floating-point-fp ((op '(#b001 #b000))))
2676 (if (fp-reg-tn-p source)
2677 (emit-byte segment #b11011001)
2679 (maybe-emit-rex-for-ea segment source nil)
2680 (emit-byte segment #b11011101)))
2681 (emit-fp-op segment source #b000)))
2683 ;;; Load long to st(0).
2684 (define-instruction fldl (segment source)
2685 (:printer floating-point ((op '(#b011 #b101))))
2687 (and (not (fp-reg-tn-p source))
2688 (maybe-emit-rex-for-ea segment source nil))
2689 (emit-byte segment #b11011011)
2690 (emit-fp-op segment source #b101)))
2692 ;;; Store single from st(0).
2693 (define-instruction fst (segment dest)
2694 (:printer floating-point ((op '(#b001 #b010))))
2696 (cond ((fp-reg-tn-p dest)
2697 (emit-byte segment #b11011101)
2698 (emit-fp-op segment dest #b010))
2700 (maybe-emit-rex-for-ea segment dest nil)
2701 (emit-byte segment #b11011001)
2702 (emit-fp-op segment dest #b010)))))
2704 ;;; Store double from st(0).
2705 (define-instruction fstd (segment dest)
2706 (:printer floating-point ((op '(#b101 #b010))))
2707 (:printer floating-point-fp ((op '(#b101 #b010))))
2709 (cond ((fp-reg-tn-p dest)
2710 (emit-byte segment #b11011101)
2711 (emit-fp-op segment dest #b010))
2713 (maybe-emit-rex-for-ea segment dest nil)
2714 (emit-byte segment #b11011101)
2715 (emit-fp-op segment dest #b010)))))
2717 ;;; Arithmetic ops are all done with at least one operand at top of
2718 ;;; stack. The other operand is is another register or a 32/64 bit
2721 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2722 ;;; that these conflict with the Gdb conventions for binops. To reduce
2723 ;;; the confusion I've added comments showing the mathamatical
2724 ;;; operation and the two syntaxes. By the ASM386 convention the
2725 ;;; instruction syntax is:
2728 ;;; or Fop Destination, Source
2730 ;;; If only one operand is given then it is the source and the
2731 ;;; destination is ST(0). There are reversed forms of the fsub and
2732 ;;; fdiv instructions inducated by an 'R' suffix.
2734 ;;; The mathematical operation for the non-reverse form is always:
2735 ;;; destination = destination op source
2737 ;;; For the reversed form it is:
2738 ;;; destination = source op destination
2740 ;;; The instructions below only accept one operand at present which is
2741 ;;; usually the source. I've hack in extra instructions to implement
2742 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2743 ;;; the operand is the destination with the source being ST(0).
2746 ;;; st(0) = st(0) + memory or st(i).
2747 (define-instruction fadd (segment source)
2748 (:printer floating-point ((op '(#b000 #b000))))
2750 (and (not (fp-reg-tn-p source))
2751 (maybe-emit-rex-for-ea segment source nil))
2752 (emit-byte segment #b11011000)
2753 (emit-fp-op segment source #b000)))
2756 ;;; st(0) = st(0) + memory or st(i).
2757 (define-instruction faddd (segment source)
2758 (:printer floating-point ((op '(#b100 #b000))))
2759 (:printer floating-point-fp ((op '(#b000 #b000))))
2761 (and (not (fp-reg-tn-p source))
2762 (maybe-emit-rex-for-ea segment source nil))
2763 (if (fp-reg-tn-p source)
2764 (emit-byte segment #b11011000)
2765 (emit-byte segment #b11011100))
2766 (emit-fp-op segment source #b000)))
2768 ;;; Add double destination st(i):
2769 ;;; st(i) = st(0) + st(i).
2770 (define-instruction fadd-sti (segment destination)
2771 (:printer floating-point-fp ((op '(#b100 #b000))))
2773 (aver (fp-reg-tn-p destination))
2774 (emit-byte segment #b11011100)
2775 (emit-fp-op segment destination #b000)))
2777 (define-instruction faddp-sti (segment destination)
2778 (:printer floating-point-fp ((op '(#b110 #b000))))
2780 (aver (fp-reg-tn-p destination))
2781 (emit-byte segment #b11011110)
2782 (emit-fp-op segment destination #b000)))
2784 ;;; Subtract single:
2785 ;;; st(0) = st(0) - memory or st(i).
2786 (define-instruction fsub (segment source)
2787 (:printer floating-point ((op '(#b000 #b100))))
2789 (and (not (fp-reg-tn-p source))
2790 (maybe-emit-rex-for-ea segment source nil))
2791 (emit-byte segment #b11011000)
2792 (emit-fp-op segment source #b100)))
2794 ;;; Subtract single, reverse:
2795 ;;; st(0) = memory or st(i) - st(0).
2796 (define-instruction fsubr (segment source)
2797 (:printer floating-point ((op '(#b000 #b101))))
2799 (and (not (fp-reg-tn-p source))
2800 (maybe-emit-rex-for-ea segment source nil))
2801 (emit-byte segment #b11011000)
2802 (emit-fp-op segment source #b101)))
2804 ;;; Subtract double:
2805 ;;; st(0) = st(0) - memory or st(i).
2806 (define-instruction fsubd (segment source)
2807 (:printer floating-point ((op '(#b100 #b100))))
2808 (:printer floating-point-fp ((op '(#b000 #b100))))
2810 (if (fp-reg-tn-p source)
2811 (emit-byte segment #b11011000)
2813 (and (not (fp-reg-tn-p source))
2814 (maybe-emit-rex-for-ea segment source nil))
2815 (emit-byte segment #b11011100)))
2816 (emit-fp-op segment source #b100)))
2818 ;;; Subtract double, reverse:
2819 ;;; st(0) = memory or st(i) - st(0).
2820 (define-instruction fsubrd (segment source)
2821 (:printer floating-point ((op '(#b100 #b101))))
2822 (:printer floating-point-fp ((op '(#b000 #b101))))
2824 (if (fp-reg-tn-p source)
2825 (emit-byte segment #b11011000)
2827 (and (not (fp-reg-tn-p source))
2828 (maybe-emit-rex-for-ea segment source nil))
2829 (emit-byte segment #b11011100)))
2830 (emit-fp-op segment source #b101)))
2832 ;;; Subtract double, destination st(i):
2833 ;;; st(i) = st(i) - st(0).
2835 ;;; ASM386 syntax: FSUB ST(i), ST
2836 ;;; Gdb syntax: fsubr %st,%st(i)
2837 (define-instruction fsub-sti (segment destination)
2838 (:printer floating-point-fp ((op '(#b100 #b101))))
2840 (aver (fp-reg-tn-p destination))
2841 (emit-byte segment #b11011100)
2842 (emit-fp-op segment destination #b101)))
2844 (define-instruction fsubp-sti (segment destination)
2845 (:printer floating-point-fp ((op '(#b110 #b101))))
2847 (aver (fp-reg-tn-p destination))
2848 (emit-byte segment #b11011110)
2849 (emit-fp-op segment destination #b101)))
2851 ;;; Subtract double, reverse, destination st(i):
2852 ;;; st(i) = st(0) - st(i).
2854 ;;; ASM386 syntax: FSUBR ST(i), ST
2855 ;;; Gdb syntax: fsub %st,%st(i)
2856 (define-instruction fsubr-sti (segment destination)
2857 (:printer floating-point-fp ((op '(#b100 #b100))))
2859 (aver (fp-reg-tn-p destination))
2860 (emit-byte segment #b11011100)
2861 (emit-fp-op segment destination #b100)))
2863 (define-instruction fsubrp-sti (segment destination)
2864 (:printer floating-point-fp ((op '(#b110 #b100))))
2866 (aver (fp-reg-tn-p destination))
2867 (emit-byte segment #b11011110)
2868 (emit-fp-op segment destination #b100)))
2870 ;;; Multiply single:
2871 ;;; st(0) = st(0) * memory or st(i).
2872 (define-instruction fmul (segment source)
2873 (:printer floating-point ((op '(#b000 #b001))))
2875 (and (not (fp-reg-tn-p source))
2876 (maybe-emit-rex-for-ea segment source nil))
2877 (emit-byte segment #b11011000)
2878 (emit-fp-op segment source #b001)))
2880 ;;; Multiply double:
2881 ;;; st(0) = st(0) * memory or st(i).
2882 (define-instruction fmuld (segment source)
2883 (:printer floating-point ((op '(#b100 #b001))))
2884 (:printer floating-point-fp ((op '(#b000 #b001))))
2886 (if (fp-reg-tn-p source)
2887 (emit-byte segment #b11011000)
2889 (and (not (fp-reg-tn-p source))
2890 (maybe-emit-rex-for-ea segment source nil))
2891 (emit-byte segment #b11011100)))
2892 (emit-fp-op segment source #b001)))
2894 ;;; Multiply double, destination st(i):
2895 ;;; st(i) = st(i) * st(0).
2896 (define-instruction fmul-sti (segment destination)
2897 (:printer floating-point-fp ((op '(#b100 #b001))))
2899 (aver (fp-reg-tn-p destination))
2900 (emit-byte segment #b11011100)
2901 (emit-fp-op segment destination #b001)))
2904 ;;; st(0) = st(0) / memory or st(i).
2905 (define-instruction fdiv (segment source)
2906 (:printer floating-point ((op '(#b000 #b110))))
2908 (and (not (fp-reg-tn-p source))
2909 (maybe-emit-rex-for-ea segment source nil))
2910 (emit-byte segment #b11011000)
2911 (emit-fp-op segment source #b110)))
2913 ;;; Divide single, reverse:
2914 ;;; st(0) = memory or st(i) / st(0).
2915 (define-instruction fdivr (segment source)
2916 (:printer floating-point ((op '(#b000 #b111))))
2918 (and (not (fp-reg-tn-p source))
2919 (maybe-emit-rex-for-ea segment source nil))
2920 (emit-byte segment #b11011000)
2921 (emit-fp-op segment source #b111)))
2924 ;;; st(0) = st(0) / memory or st(i).
2925 (define-instruction fdivd (segment source)
2926 (:printer floating-point ((op '(#b100 #b110))))
2927 (:printer floating-point-fp ((op '(#b000 #b110))))
2929 (if (fp-reg-tn-p source)
2930 (emit-byte segment #b11011000)
2932 (and (not (fp-reg-tn-p source))
2933 (maybe-emit-rex-for-ea segment source nil))
2934 (emit-byte segment #b11011100)))
2935 (emit-fp-op segment source #b110)))
2937 ;;; Divide double, reverse:
2938 ;;; st(0) = memory or st(i) / st(0).
2939 (define-instruction fdivrd (segment source)
2940 (:printer floating-point ((op '(#b100 #b111))))
2941 (:printer floating-point-fp ((op '(#b000 #b111))))
2943 (if (fp-reg-tn-p source)
2944 (emit-byte segment #b11011000)
2946 (and (not (fp-reg-tn-p source))
2947 (maybe-emit-rex-for-ea segment source nil))
2948 (emit-byte segment #b11011100)))
2949 (emit-fp-op segment source #b111)))
2951 ;;; Divide double, destination st(i):
2952 ;;; st(i) = st(i) / st(0).
2954 ;;; ASM386 syntax: FDIV ST(i), ST
2955 ;;; Gdb syntax: fdivr %st,%st(i)
2956 (define-instruction fdiv-sti (segment destination)
2957 (:printer floating-point-fp ((op '(#b100 #b111))))
2959 (aver (fp-reg-tn-p destination))
2960 (emit-byte segment #b11011100)
2961 (emit-fp-op segment destination #b111)))
2963 ;;; Divide double, reverse, destination st(i):
2964 ;;; st(i) = st(0) / st(i).
2966 ;;; ASM386 syntax: FDIVR ST(i), ST
2967 ;;; Gdb syntax: fdiv %st,%st(i)
2968 (define-instruction fdivr-sti (segment destination)
2969 (:printer floating-point-fp ((op '(#b100 #b110))))
2971 (aver (fp-reg-tn-p destination))
2972 (emit-byte segment #b11011100)
2973 (emit-fp-op segment destination #b110)))
2975 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2976 (define-instruction fxch (segment source)
2977 (:printer floating-point-fp ((op '(#b001 #b001))))
2979 (unless (and (tn-p source)
2980 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2982 (emit-byte segment #b11011001)
2983 (emit-fp-op segment source #b001)))
2985 ;;; Push 32-bit integer to st0.
2986 (define-instruction fild (segment source)
2987 (:printer floating-point ((op '(#b011 #b000))))
2989 (and (not (fp-reg-tn-p source))
2990 (maybe-emit-rex-for-ea segment source nil))
2991 (emit-byte segment #b11011011)
2992 (emit-fp-op segment source #b000)))
2994 ;;; Push 64-bit integer to st0.
2995 (define-instruction fildl (segment source)
2996 (:printer floating-point ((op '(#b111 #b101))))
2998 (and (not (fp-reg-tn-p source))
2999 (maybe-emit-rex-for-ea segment source nil))
3000 (emit-byte segment #b11011111)
3001 (emit-fp-op segment source #b101)))
3003 ;;; Store 32-bit integer.
3004 (define-instruction fist (segment dest)
3005 (:printer floating-point ((op '(#b011 #b010))))
3007 (and (not (fp-reg-tn-p dest))
3008 (maybe-emit-rex-for-ea segment dest nil))
3009 (emit-byte segment #b11011011)
3010 (emit-fp-op segment dest #b010)))
3012 ;;; Store and pop 32-bit integer.
3013 (define-instruction fistp (segment dest)
3014 (:printer floating-point ((op '(#b011 #b011))))
3016 (and (not (fp-reg-tn-p dest))
3017 (maybe-emit-rex-for-ea segment dest nil))
3018 (emit-byte segment #b11011011)
3019 (emit-fp-op segment dest #b011)))
3021 ;;; Store and pop 64-bit integer.
3022 (define-instruction fistpl (segment dest)
3023 (:printer floating-point ((op '(#b111 #b111))))
3025 (and (not (fp-reg-tn-p dest))
3026 (maybe-emit-rex-for-ea segment dest nil))
3027 (emit-byte segment #b11011111)
3028 (emit-fp-op segment dest #b111)))
3030 ;;; Store single from st(0) and pop.
3031 (define-instruction fstp (segment dest)
3032 (:printer floating-point ((op '(#b001 #b011))))
3034 (cond ((fp-reg-tn-p dest)
3035 (emit-byte segment #b11011101)
3036 (emit-fp-op segment dest #b011))
3038 (maybe-emit-rex-for-ea segment dest nil)
3039 (emit-byte segment #b11011001)
3040 (emit-fp-op segment dest #b011)))))
3042 ;;; Store double from st(0) and pop.
3043 (define-instruction fstpd (segment dest)
3044 (:printer floating-point ((op '(#b101 #b011))))
3045 (:printer floating-point-fp ((op '(#b101 #b011))))
3047 (cond ((fp-reg-tn-p dest)
3048 (emit-byte segment #b11011101)
3049 (emit-fp-op segment dest #b011))
3051 (maybe-emit-rex-for-ea segment dest nil)
3052 (emit-byte segment #b11011101)
3053 (emit-fp-op segment dest #b011)))))
3055 ;;; Store long from st(0) and pop.
3056 (define-instruction fstpl (segment dest)
3057 (:printer floating-point ((op '(#b011 #b111))))
3059 (and (not (fp-reg-tn-p dest))
3060 (maybe-emit-rex-for-ea segment dest nil))
3061 (emit-byte segment #b11011011)
3062 (emit-fp-op segment dest #b111)))
3064 ;;; Decrement stack-top pointer.
3065 (define-instruction fdecstp (segment)
3066 (:printer floating-point-no ((op #b10110)))
3068 (emit-byte segment #b11011001)
3069 (emit-byte segment #b11110110)))
3071 ;;; Increment stack-top pointer.
3072 (define-instruction fincstp (segment)
3073 (:printer floating-point-no ((op #b10111)))
3075 (emit-byte segment #b11011001)
3076 (emit-byte segment #b11110111)))
3078 ;;; Free fp register.
3079 (define-instruction ffree (segment dest)
3080 (:printer floating-point-fp ((op '(#b101 #b000))))
3082 (and (not (fp-reg-tn-p dest))
3083 (maybe-emit-rex-for-ea segment dest nil))
3084 (emit-byte segment #b11011101)
3085 (emit-fp-op segment dest #b000)))
3087 (define-instruction fabs (segment)
3088 (:printer floating-point-no ((op #b00001)))
3090 (emit-byte segment #b11011001)
3091 (emit-byte segment #b11100001)))
3093 (define-instruction fchs (segment)
3094 (:printer floating-point-no ((op #b00000)))
3096 (emit-byte segment #b11011001)
3097 (emit-byte segment #b11100000)))
3099 (define-instruction frndint(segment)
3100 (:printer floating-point-no ((op #b11100)))
3102 (emit-byte segment #b11011001)
3103 (emit-byte segment #b11111100)))
3106 (define-instruction fninit(segment)
3107 (:printer floating-point-5 ((op #b00011)))
3109 (emit-byte segment #b11011011)
3110 (emit-byte segment #b11100011)))
3112 ;;; Store Status Word to AX.
3113 (define-instruction fnstsw(segment)
3114 (:printer floating-point-st ((op #b00000)))
3116 (emit-byte segment #b11011111)
3117 (emit-byte segment #b11100000)))
3119 ;;; Load Control Word.
3121 ;;; src must be a memory location
3122 (define-instruction fldcw(segment src)
3123 (:printer floating-point ((op '(#b001 #b101))))
3125 (and (not (fp-reg-tn-p src))
3126 (maybe-emit-rex-for-ea segment src nil))
3127 (emit-byte segment #b11011001)
3128 (emit-fp-op segment src #b101)))
3130 ;;; Store Control Word.
3131 (define-instruction fnstcw(segment dst)
3132 (:printer floating-point ((op '(#b001 #b111))))
3134 (and (not (fp-reg-tn-p dst))
3135 (maybe-emit-rex-for-ea segment dst nil))
3136 (emit-byte segment #b11011001)
3137 (emit-fp-op segment dst #b111)))
3139 ;;; Store FP Environment.
3140 (define-instruction fstenv(segment dst)
3141 (:printer floating-point ((op '(#b001 #b110))))
3143 (and (not (fp-reg-tn-p dst))
3144 (maybe-emit-rex-for-ea segment dst nil))
3145 (emit-byte segment #b11011001)
3146 (emit-fp-op segment dst #b110)))
3148 ;;; Restore FP Environment.
3149 (define-instruction fldenv(segment src)
3150 (:printer floating-point ((op '(#b001 #b100))))
3152 (and (not (fp-reg-tn-p src))
3153 (maybe-emit-rex-for-ea segment src nil))
3154 (emit-byte segment #b11011001)
3155 (emit-fp-op segment src #b100)))
3158 (define-instruction fsave(segment dst)
3159 (:printer floating-point ((op '(#b101 #b110))))
3161 (and (not (fp-reg-tn-p dst))
3162 (maybe-emit-rex-for-ea segment dst nil))
3163 (emit-byte segment #b11011101)
3164 (emit-fp-op segment dst #b110)))
3166 ;;; Restore FP State.
3167 (define-instruction frstor(segment src)
3168 (:printer floating-point ((op '(#b101 #b100))))
3170 (and (not (fp-reg-tn-p src))
3171 (maybe-emit-rex-for-ea segment src nil))
3172 (emit-byte segment #b11011101)
3173 (emit-fp-op segment src #b100)))
3175 ;;; Clear exceptions.
3176 (define-instruction fnclex(segment)
3177 (:printer floating-point-5 ((op #b00010)))
3179 (emit-byte segment #b11011011)
3180 (emit-byte segment #b11100010)))
3183 (define-instruction fcom (segment src)
3184 (:printer floating-point ((op '(#b000 #b010))))
3186 (and (not (fp-reg-tn-p src))
3187 (maybe-emit-rex-for-ea segment src nil))
3188 (emit-byte segment #b11011000)
3189 (emit-fp-op segment src #b010)))
3191 (define-instruction fcomd (segment src)
3192 (:printer floating-point ((op '(#b100 #b010))))
3193 (:printer floating-point-fp ((op '(#b000 #b010))))
3195 (if (fp-reg-tn-p src)
3196 (emit-byte segment #b11011000)
3198 (maybe-emit-rex-for-ea segment src nil)
3199 (emit-byte segment #b11011100)))
3200 (emit-fp-op segment src #b010)))
3202 ;;; Compare ST1 to ST0, popping the stack twice.
3203 (define-instruction fcompp (segment)
3204 (:printer floating-point-3 ((op '(#b110 #b011001))))
3206 (emit-byte segment #b11011110)
3207 (emit-byte segment #b11011001)))
3209 ;;; unordered comparison
3210 (define-instruction fucom (segment src)
3211 (:printer floating-point-fp ((op '(#b101 #b100))))
3213 (aver (fp-reg-tn-p src))
3214 (emit-byte segment #b11011101)
3215 (emit-fp-op segment src #b100)))
3217 (define-instruction ftst (segment)
3218 (:printer floating-point-no ((op #b00100)))
3220 (emit-byte segment #b11011001)
3221 (emit-byte segment #b11100100)))
3225 (define-instruction fsqrt(segment)
3226 (:printer floating-point-no ((op #b11010)))
3228 (emit-byte segment #b11011001)
3229 (emit-byte segment #b11111010)))
3231 (define-instruction fscale(segment)
3232 (:printer floating-point-no ((op #b11101)))
3234 (emit-byte segment #b11011001)
3235 (emit-byte segment #b11111101)))
3237 (define-instruction fxtract(segment)
3238 (:printer floating-point-no ((op #b10100)))
3240 (emit-byte segment #b11011001)
3241 (emit-byte segment #b11110100)))
3243 (define-instruction fsin(segment)
3244 (:printer floating-point-no ((op #b11110)))
3246 (emit-byte segment #b11011001)
3247 (emit-byte segment #b11111110)))
3249 (define-instruction fcos(segment)
3250 (:printer floating-point-no ((op #b11111)))
3252 (emit-byte segment #b11011001)
3253 (emit-byte segment #b11111111)))
3255 (define-instruction fprem1(segment)
3256 (:printer floating-point-no ((op #b10101)))
3258 (emit-byte segment #b11011001)
3259 (emit-byte segment #b11110101)))
3261 (define-instruction fprem(segment)
3262 (:printer floating-point-no ((op #b11000)))
3264 (emit-byte segment #b11011001)
3265 (emit-byte segment #b11111000)))
3267 (define-instruction fxam (segment)
3268 (:printer floating-point-no ((op #b00101)))
3270 (emit-byte segment #b11011001)
3271 (emit-byte segment #b11100101)))
3273 ;;; These do push/pop to stack and need special handling
3274 ;;; in any VOPs that use them. See the book.
3276 ;;; st0 <- st1*log2(st0)
3277 (define-instruction fyl2x(segment) ; pops stack
3278 (:printer floating-point-no ((op #b10001)))
3280 (emit-byte segment #b11011001)
3281 (emit-byte segment #b11110001)))
3283 (define-instruction fyl2xp1(segment)
3284 (:printer floating-point-no ((op #b11001)))
3286 (emit-byte segment #b11011001)
3287 (emit-byte segment #b11111001)))
3289 (define-instruction f2xm1(segment)
3290 (:printer floating-point-no ((op #b10000)))
3292 (emit-byte segment #b11011001)
3293 (emit-byte segment #b11110000)))
3295 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
3296 (:printer floating-point-no ((op #b10010)))
3298 (emit-byte segment #b11011001)
3299 (emit-byte segment #b11110010)))
3301 (define-instruction fpatan(segment) ; POPS STACK
3302 (:printer floating-point-no ((op #b10011)))
3304 (emit-byte segment #b11011001)
3305 (emit-byte segment #b11110011)))
3307 ;;;; loading constants
3309 (define-instruction fldz(segment)
3310 (:printer floating-point-no ((op #b01110)))
3312 (emit-byte segment #b11011001)
3313 (emit-byte segment #b11101110)))
3315 (define-instruction fld1(segment)
3316 (:printer floating-point-no ((op #b01000)))
3318 (emit-byte segment #b11011001)
3319 (emit-byte segment #b11101000)))
3321 (define-instruction fldpi(segment)
3322 (:printer floating-point-no ((op #b01011)))
3324 (emit-byte segment #b11011001)
3325 (emit-byte segment #b11101011)))
3327 (define-instruction fldl2t(segment)
3328 (:printer floating-point-no ((op #b01001)))
3330 (emit-byte segment #b11011001)
3331 (emit-byte segment #b11101001)))
3333 (define-instruction fldl2e(segment)
3334 (:printer floating-point-no ((op #b01010)))
3336 (emit-byte segment #b11011001)
3337 (emit-byte segment #b11101010)))
3339 (define-instruction fldlg2(segment)
3340 (:printer floating-point-no ((op #b01100)))
3342 (emit-byte segment #b11011001)
3343 (emit-byte segment #b11101100)))
3345 (define-instruction fldln2(segment)
3346 (:printer floating-point-no ((op #b01101)))
3348 (emit-byte segment #b11011001)
3349 (emit-byte segment #b11101101)))
3351 ;; new xmm insns required by sse float
3352 ;; movsd andpd comisd comiss
3354 (define-instruction movsd (segment dst src)
3355 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3357 (cond ((typep src 'tn)
3358 (emit-byte segment #xf2)
3359 (maybe-emit-rex-for-ea segment dst src)
3360 (emit-byte segment #x0f)
3361 (emit-byte segment #x11)
3362 (emit-ea segment dst (reg-tn-encoding src)))
3364 (emit-byte segment #xf2)
3365 (maybe-emit-rex-for-ea segment src dst)
3366 (emit-byte segment #x0f)
3367 (emit-byte segment #x10)
3368 (emit-ea segment src (reg-tn-encoding dst))))))
3370 (define-instruction movss (segment dst src)
3371 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3374 (emit-byte segment #xf3)
3375 (maybe-emit-rex-for-ea segment dst src)
3376 (emit-byte segment #x0f)
3377 (emit-byte segment #x11)
3378 (emit-ea segment dst (reg-tn-encoding src)))
3380 (emit-byte segment #xf3)
3381 (maybe-emit-rex-for-ea segment src dst)
3382 (emit-byte segment #x0f)
3383 (emit-byte segment #x10)
3384 (emit-ea segment src (reg-tn-encoding dst))))))
3386 (define-instruction andpd (segment dst src)
3387 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3389 (emit-byte segment #x66)
3390 (maybe-emit-rex-for-ea segment src dst)
3391 (emit-byte segment #x0f)
3392 (emit-byte segment #x54)
3393 (emit-ea segment src (reg-tn-encoding dst))))
3395 (define-instruction andps (segment dst src)
3397 (maybe-emit-rex-for-ea segment src dst)
3398 (emit-byte segment #x0f)
3399 (emit-byte segment #x54)
3400 (emit-ea segment src (reg-tn-encoding dst))))
3402 (define-instruction comisd (segment dst src)
3403 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3405 (emit-byte segment #x66)
3406 (maybe-emit-rex-for-ea segment src dst)
3407 (emit-byte segment #x0f)
3408 (emit-byte segment #x2f)
3409 (emit-ea segment src (reg-tn-encoding dst))))
3411 (define-instruction comiss (segment dst src)
3412 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3414 (maybe-emit-rex-for-ea segment src dst)
3415 (emit-byte segment #x0f)
3416 (emit-byte segment #x2f)
3417 (emit-ea segment src (reg-tn-encoding dst))))
3419 ;; movd movq xorp xord
3421 ;; we only do the xmm version of movd
3422 (define-instruction movd (segment dst src)
3423 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3425 (cond ((fp-reg-tn-p dst)
3426 (emit-byte segment #x66)
3427 (maybe-emit-rex-for-ea segment src dst)
3428 (emit-byte segment #x0f)
3429 (emit-byte segment #x6e)
3430 (emit-ea segment src (reg-tn-encoding dst)))
3432 (aver (fp-reg-tn-p src))
3433 (emit-byte segment #x66)
3434 (maybe-emit-rex-for-ea segment dst src)
3435 (emit-byte segment #x0f)
3436 (emit-byte segment #x7e)
3437 (emit-ea segment dst (reg-tn-encoding src))))))
3439 (define-instruction movq (segment dst src)
3440 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3442 (cond ((fp-reg-tn-p dst)
3443 (emit-byte segment #xf3)
3444 (maybe-emit-rex-for-ea segment src dst)
3445 (emit-byte segment #x0f)
3446 (emit-byte segment #x7e)
3447 (emit-ea segment src (reg-tn-encoding dst)))
3449 (aver (fp-reg-tn-p src))
3450 (emit-byte segment #x66)
3451 (maybe-emit-rex-for-ea segment dst src)
3452 (emit-byte segment #x0f)
3453 (emit-byte segment #xd6)
3454 (emit-ea segment dst (reg-tn-encoding src))))))
3456 (define-instruction xorpd (segment dst src)
3457 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3459 (emit-byte segment #x66)
3460 (maybe-emit-rex-for-ea segment src dst)
3461 (emit-byte segment #x0f)
3462 (emit-byte segment #x57)
3463 (emit-ea segment src (reg-tn-encoding dst))))
3465 (define-instruction xorps (segment dst src)
3466 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3468 (maybe-emit-rex-for-ea segment src dst)
3469 (emit-byte segment #x0f)
3470 (emit-byte segment #x57)
3471 (emit-ea segment src (reg-tn-encoding dst))))
3473 (define-instruction cvtsd2si (segment dst src)
3474 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3476 (emit-byte segment #xf2)
3477 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3478 (emit-byte segment #x0f)
3479 (emit-byte segment #x2d)
3480 (emit-ea segment src (reg-tn-encoding dst))))
3482 (define-instruction cvtsd2ss (segment dst src)
3483 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3485 (emit-byte segment #xf2)
3486 (maybe-emit-rex-for-ea segment src dst)
3487 (emit-byte segment #x0f)
3488 (emit-byte segment #x5a)
3489 (emit-ea segment src (reg-tn-encoding dst))))
3491 (define-instruction cvtss2si (segment dst src)
3492 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3494 (emit-byte segment #xf3)
3495 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3496 (emit-byte segment #x0f)
3497 (emit-byte segment #x2d)
3498 (emit-ea segment src (reg-tn-encoding dst))))
3500 (define-instruction cvtss2sd (segment dst src)
3501 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3503 (emit-byte segment #xf3)
3504 (maybe-emit-rex-for-ea segment src dst)
3505 (emit-byte segment #x0f)
3506 (emit-byte segment #x5a)
3507 (emit-ea segment src (reg-tn-encoding dst))))
3509 (define-instruction cvtsi2ss (segment dst src)
3510 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3512 (emit-byte segment #xf3)
3513 (maybe-emit-rex-for-ea segment src dst)
3514 (emit-byte segment #x0f)
3515 (emit-byte segment #x2a)
3516 (emit-ea segment src (reg-tn-encoding dst))))
3518 (define-instruction cvtsi2sd (segment dst src)
3519 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3521 (emit-byte segment #xf2)
3522 (maybe-emit-rex-for-ea segment src dst)
3523 (emit-byte segment #x0f)
3524 (emit-byte segment #x2a)
3525 (emit-ea segment src (reg-tn-encoding dst))))
3527 (define-instruction cvtdq2pd (segment dst src)
3528 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3530 (emit-byte segment #xf3)
3531 (maybe-emit-rex-for-ea segment src dst)
3532 (emit-byte segment #x0f)
3533 (emit-byte segment #xe6)
3534 (emit-ea segment src (reg-tn-encoding dst))))
3536 (define-instruction cvtdq2ps (segment dst src)
3537 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3539 (maybe-emit-rex-for-ea segment src dst)
3540 (emit-byte segment #x0f)
3541 (emit-byte segment #x5b)
3542 (emit-ea segment src (reg-tn-encoding dst))))
3544 ;; CVTTSD2SI CVTTSS2SI
3546 (define-instruction cvttsd2si (segment dst src)
3547 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3549 (emit-byte segment #xf2)
3550 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3551 (emit-byte segment #x0f)
3552 (emit-byte segment #x2c)
3553 (emit-ea segment src (reg-tn-encoding dst))))
3555 (define-instruction cvttss2si (segment dst src)
3556 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3558 (emit-byte segment #xf3)
3559 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3560 (emit-byte segment #x0f)
3561 (emit-byte segment #x2c)
3562 (emit-ea segment src (reg-tn-encoding dst))))
3564 (define-instruction addsd (segment dst src)
3565 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3567 (emit-byte segment #xf2)
3568 (maybe-emit-rex-for-ea segment src dst)
3569 (emit-byte segment #x0f)
3570 (emit-byte segment #x58)
3571 (emit-ea segment src (reg-tn-encoding dst))))
3573 (define-instruction addss (segment dst src)
3574 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3576 (emit-byte segment #xf3)
3577 (maybe-emit-rex-for-ea segment src dst)
3578 (emit-byte segment #x0f)
3579 (emit-byte segment #x58)
3580 (emit-ea segment src (reg-tn-encoding dst))))
3582 (define-instruction divsd (segment dst src)
3583 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3585 (emit-byte segment #xf2)
3586 (maybe-emit-rex-for-ea segment src dst)
3587 (emit-byte segment #x0f)
3588 (emit-byte segment #x5e)
3589 (emit-ea segment src (reg-tn-encoding dst))))
3591 (define-instruction divss (segment dst src)
3592 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3594 (emit-byte segment #xf3)
3595 (maybe-emit-rex-for-ea segment src dst)
3596 (emit-byte segment #x0f)
3597 (emit-byte segment #x5e)
3598 (emit-ea segment src (reg-tn-encoding dst))))
3600 (define-instruction mulsd (segment dst src)
3601 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3603 (emit-byte segment #xf2)
3604 (maybe-emit-rex-for-ea segment src dst)
3605 (emit-byte segment #x0f)
3606 (emit-byte segment #x59)
3607 (emit-ea segment src (reg-tn-encoding dst))))
3609 (define-instruction mulss (segment dst src)
3610 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3612 (emit-byte segment #xf3)
3613 (maybe-emit-rex-for-ea segment src dst)
3614 (emit-byte segment #x0f)
3615 (emit-byte segment #x59)
3616 (emit-ea segment src (reg-tn-encoding dst))))
3618 (define-instruction subsd (segment dst src)
3619 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3621 (emit-byte segment #xf2)
3622 (maybe-emit-rex-for-ea segment src dst)
3623 (emit-byte segment #x0f)
3624 (emit-byte segment #x5c)
3625 (emit-ea segment src (reg-tn-encoding dst))))
3627 (define-instruction subss (segment dst src)
3628 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3630 (emit-byte segment #xf3)
3631 (maybe-emit-rex-for-ea segment src dst)
3632 (emit-byte segment #x0f)
3633 (emit-byte segment #x5c)
3634 (emit-ea segment src (reg-tn-encoding dst))))
3636 (define-instruction ldmxcsr (segment src)
3638 (emit-byte segment #x0f)
3639 (emit-byte segment #xae)
3640 (emit-ea segment src 2)))
3642 (define-instruction stmxcsr (segment dst)
3644 (emit-byte segment #x0f)
3645 (emit-byte segment #xae)
3646 (emit-ea segment dst 3)))