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 ;;; The XMM registers XMM0 - XMM15.
29 (deftype xmmreg
() '(unsigned-byte 4))
31 ;;; Default word size for the chip: if the operand size /= :dword
32 ;;; we need to output #x66 (or REX) prefix
33 (def!constant
+default-operand-size
+ :dword
)
35 ;;; The default address size for the chip. It could be overwritten
36 ;;; to :dword with a #x67 prefix, but this is never needed by SBCL
37 ;;; and thus not supported by this assembler/disassembler.
38 (def!constant
+default-address-size
+ :qword
)
40 (eval-when (#-sb-xc
:compile-toplevel
:load-toplevel
:execute
)
42 (defun offset-next (value dstate
)
43 (declare (type integer value
)
44 (type sb
!disassem
:disassem-state dstate
))
45 (+ (sb!disassem
:dstate-next-addr dstate
) value
))
47 (defparameter *byte-reg-names
*
48 #(al cl dl bl spl bpl sil dil r8b r9b r10b r11b r12b r13b r14b r15b
))
49 (defparameter *high-byte-reg-names
*
51 (defparameter *word-reg-names
*
52 #(ax cx dx bx sp bp si di r8w r9w r10w r11w r12w r13w r14w r15w
))
53 (defparameter *dword-reg-names
*
54 #(eax ecx edx ebx esp ebp esi edi r8d r9d r10d r11d r12d r13d r14d r15d
))
55 (defparameter *qword-reg-names
*
56 #(rax rcx rdx rbx rsp rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15
))
58 ;;; The printers for registers, memory references and immediates need to
59 ;;; take into account the width bit in the instruction, whether a #x66
60 ;;; or a REX prefix was issued, and the contents of the REX prefix.
61 ;;; This is implemented using prefilters to put flags into the slot
62 ;;; INST-PROPERTIES of the DSTATE. These flags are the following
65 ;;; OPERAND-SIZE-8 The width bit was zero
66 ;;; OPERAND-SIZE-16 The "operand size override" prefix (#x66) was found
67 ;;; REX A REX prefix was found
68 ;;; REX-W A REX prefix with the "operand width" bit set was
70 ;;; REX-R A REX prefix with the "register" bit set was found
71 ;;; REX-X A REX prefix with the "index" bit set was found
72 ;;; REX-B A REX prefix with the "base" bit set was found
74 ;;; Return the operand size depending on the prefixes and width bit as
76 (defun inst-operand-size (dstate)
77 (declare (type sb
!disassem
:disassem-state dstate
))
78 (cond ((sb!disassem
:dstate-get-inst-prop dstate
'operand-size-8
)
80 ((sb!disassem
:dstate-get-inst-prop dstate
'rex-w
)
82 ((sb!disassem
:dstate-get-inst-prop dstate
'operand-size-16
)
85 +default-operand-size
+)))
87 ;;; The same as INST-OPERAND-SIZE, but for those instructions (e.g.
88 ;;; PUSH, JMP) that have a default operand size of :qword. It can only
89 ;;; be overwritten to :word.
90 (defun inst-operand-size-default-qword (dstate)
91 (declare (type sb
!disassem
:disassem-state dstate
))
92 (if (sb!disassem
:dstate-get-inst-prop dstate
'operand-size-16
)
96 ;;; Print to STREAM the name of the general-purpose register encoded by
97 ;;; VALUE and of size WIDTH. For robustness, the high byte registers
98 ;;; (AH, BH, CH, DH) are correctly detected, too, although the compiler
99 ;;; does not use them.
100 (defun print-reg-with-width (value width stream dstate
)
101 (declare (type full-reg value
)
103 (type sb
!disassem
:disassem-state dstate
))
104 (princ (if (and (eq width
:byte
)
106 (not (sb!disassem
:dstate-get-inst-prop dstate
'rex
)))
107 (aref *high-byte-reg-names
* (- value
4))
109 (:byte
*byte-reg-names
*)
110 (:word
*word-reg-names
*)
111 (:dword
*dword-reg-names
*)
112 (:qword
*qword-reg-names
*))
115 ;; XXX plus should do some source-var notes
118 (defun print-reg (value stream dstate
)
119 (declare (type full-reg value
)
121 (type sb
!disassem
:disassem-state dstate
))
122 (print-reg-with-width value
123 (inst-operand-size dstate
)
127 (defun print-reg-default-qword (value stream dstate
)
128 (declare (type full-reg value
)
130 (type sb
!disassem
:disassem-state dstate
))
131 (print-reg-with-width value
132 (inst-operand-size-default-qword dstate
)
136 (defun print-byte-reg (value stream dstate
)
137 (declare (type full-reg value
)
139 (type sb
!disassem
:disassem-state dstate
))
140 (print-reg-with-width value
:byte stream dstate
))
142 (defun print-addr-reg (value stream dstate
)
143 (declare (type full-reg value
)
145 (type sb
!disassem
:disassem-state dstate
))
146 (print-reg-with-width value
+default-address-size
+ stream dstate
))
148 ;;; Print a register or a memory reference of the given WIDTH.
149 ;;; If SIZED-P is true, add an explicit size indicator for memory
151 (defun print-reg/mem-with-width
(value width sized-p stream dstate
)
152 (declare (type (or list full-reg
) value
)
153 (type (member :byte
:word
:dword
:qword
) width
)
154 (type boolean sized-p
)
156 (type sb
!disassem
:disassem-state dstate
))
157 (if (typep value
'full-reg
)
158 (print-reg-with-width value width stream dstate
)
159 (print-mem-access value
(and sized-p width
) stream dstate
)))
161 ;;; Print a register or a memory reference. The width is determined by
162 ;;; calling INST-OPERAND-SIZE.
163 (defun print-reg/mem
(value stream dstate
)
164 (declare (type (or list full-reg
) value
)
166 (type sb
!disassem
:disassem-state dstate
))
167 (print-reg/mem-with-width
168 value
(inst-operand-size dstate
) nil stream dstate
))
170 ;; Same as print-reg/mem, but prints an explicit size indicator for
171 ;; memory references.
172 (defun print-sized-reg/mem
(value stream dstate
)
173 (declare (type (or list full-reg
) value
)
175 (type sb
!disassem
:disassem-state dstate
))
176 (print-reg/mem-with-width
177 value
(inst-operand-size dstate
) t stream dstate
))
179 ;;; Same as print-sized-reg/mem, but with a default operand size of
181 (defun print-sized-reg/mem-default-qword
(value stream dstate
)
182 (declare (type (or list full-reg
) value
)
184 (type sb
!disassem
:disassem-state dstate
))
185 (print-reg/mem-with-width
186 value
(inst-operand-size-default-qword dstate
) t stream dstate
))
188 (defun print-sized-byte-reg/mem
(value stream dstate
)
189 (declare (type (or list full-reg
) value
)
191 (type sb
!disassem
:disassem-state dstate
))
192 (print-reg/mem-with-width value
:byte t stream dstate
))
194 (defun print-sized-word-reg/mem
(value stream dstate
)
195 (declare (type (or list full-reg
) value
)
197 (type sb
!disassem
:disassem-state dstate
))
198 (print-reg/mem-with-width value
:word t stream dstate
))
200 (defun print-sized-dword-reg/mem
(value stream dstate
)
201 (declare (type (or list full-reg
) value
)
203 (type sb
!disassem
:disassem-state dstate
))
204 (print-reg/mem-with-width value
:dword t stream dstate
))
206 (defun print-label (value stream dstate
)
207 (declare (ignore dstate
))
208 (sb!disassem
:princ16 value stream
))
210 (defun print-xmmreg (value stream dstate
)
211 (declare (type xmmreg value
)
214 (format stream
"XMM~d" value
))
216 (defun print-xmmreg/mem
(value stream dstate
)
217 (declare (type (or list xmmreg
) value
)
219 (type sb
!disassem
:disassem-state dstate
))
220 (if (typep value
'xmmreg
)
221 (print-xmmreg value stream dstate
)
222 (print-mem-access value nil stream dstate
)))
224 ;; Same as print-xmmreg/mem, but prints an explicit size indicator for
225 ;; memory references.
226 (defun print-sized-xmmreg/mem
(value stream dstate
)
227 (declare (type (or list xmmreg
) value
)
229 (type sb
!disassem
:disassem-state dstate
))
230 (if (typep value
'xmmreg
)
231 (print-xmmreg value stream dstate
)
232 (print-mem-access value
(inst-operand-size dstate
) stream dstate
)))
234 ;;; This prefilter is used solely for its side effects, namely to put
235 ;;; the bits found in the REX prefix into the DSTATE for use by other
236 ;;; prefilters and by printers.
237 (defun prefilter-wrxb (value dstate
)
238 (declare (type (unsigned-byte 4) value
)
239 (type sb
!disassem
:disassem-state dstate
))
240 (sb!disassem
:dstate-put-inst-prop dstate
'rex
)
241 (when (plusp (logand value
#b1000
))
242 (sb!disassem
:dstate-put-inst-prop dstate
'rex-w
))
243 (when (plusp (logand value
#b0100
))
244 (sb!disassem
:dstate-put-inst-prop dstate
'rex-r
))
245 (when (plusp (logand value
#b0010
))
246 (sb!disassem
:dstate-put-inst-prop dstate
'rex-x
))
247 (when (plusp (logand value
#b0001
))
248 (sb!disassem
:dstate-put-inst-prop dstate
'rex-b
))
251 ;;; This prefilter is used solely for its side effect, namely to put
252 ;;; the property OPERAND-SIZE-8 into the DSTATE if VALUE is 0.
253 (defun prefilter-width (value dstate
)
254 (declare (type bit value
)
255 (type sb
!disassem
:disassem-state dstate
))
257 (sb!disassem
:dstate-put-inst-prop dstate
'operand-size-8
))
260 ;;; This prefilter is used solely for its side effect, namely to put
261 ;;; the property OPERAND-SIZE-16 into the DSTATE.
262 (defun prefilter-x66 (value dstate
)
263 (declare (type (eql #x66
) value
)
265 (type sb
!disassem
:disassem-state dstate
))
266 (sb!disassem
:dstate-put-inst-prop dstate
'operand-size-16
))
268 ;;; A register field that can be extended by REX.R.
269 (defun prefilter-reg-r (value dstate
)
270 (declare (type reg value
)
271 (type sb
!disassem
:disassem-state dstate
))
272 (if (sb!disassem
::dstate-get-inst-prop dstate
'rex-r
)
276 ;;; A register field that can be extended by REX.B.
277 (defun prefilter-reg-b (value dstate
)
278 (declare (type reg value
)
279 (type sb
!disassem
:disassem-state dstate
))
280 (if (sb!disassem
::dstate-get-inst-prop dstate
'rex-b
)
284 ;;; Returns either an integer, meaning a register, or a list of
285 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
286 ;;; may be missing or nil to indicate that it's not used or has the
287 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
288 ;;; of the mod and r/m field of the ModRM byte of the instruction.
289 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
290 ;;; REX.B bit from DSTATE is used to extend the sole register or the
291 ;;; BASE-REG to a full register, the REX.X bit does the same for the
293 (defun prefilter-reg/mem
(value dstate
)
294 (declare (type list value
)
295 (type sb
!disassem
:disassem-state dstate
))
296 (let ((mod (first value
))
297 (r/m
(second value
)))
298 (declare (type (unsigned-byte 2) mod
)
299 (type (unsigned-byte 3) r
/m
))
300 (let ((full-reg (if (sb!disassem
:dstate-get-inst-prop dstate
'rex-b
)
303 (declare (type full-reg full-reg
))
309 (let ((sib (sb!disassem
:read-suffix
8 dstate
)))
310 (declare (type (unsigned-byte 8) sib
))
311 (let ((base-reg (ldb (byte 3 0) sib
))
312 (index-reg (ldb (byte 3 3) sib
))
313 (index-scale (ldb (byte 2 6) sib
)))
314 (declare (type (unsigned-byte 3) base-reg index-reg
)
315 (type (unsigned-byte 2) index-scale
))
319 (if (= base-reg
#b101
)
320 (sb!disassem
:read-signed-suffix
32 dstate
)
323 (sb!disassem
:read-signed-suffix
8 dstate
))
325 (sb!disassem
:read-signed-suffix
32 dstate
)))))
326 (list (unless (and (= mod
#b00
) (= base-reg
#b101
))
327 (if (sb!disassem
:dstate-get-inst-prop dstate
'rex-b
)
331 (unless (= index-reg
#b100
)
332 (if (sb!disassem
:dstate-get-inst-prop dstate
'rex-x
)
335 (ash 1 index-scale
))))))
336 ((and (= mod
#b00
) (= r
/m
#b101
))
337 (list 'rip
(sb!disassem
:read-signed-suffix
32 dstate
)))
341 (list full-reg
(sb!disassem
:read-signed-suffix
8 dstate
)))
343 (list full-reg
(sb!disassem
:read-signed-suffix
32 dstate
)))))))
345 (defun read-address (value dstate
)
346 (declare (ignore value
)) ; always nil anyway
347 (sb!disassem
:read-suffix
(width-bits (inst-operand-size dstate
)) dstate
))
349 (defun width-bits (width)
358 ;;;; disassembler argument types
360 ;;; Used to capture the lower four bits of the REX prefix.
361 (sb!disassem
:define-arg-type wrxb
362 :prefilter
#'prefilter-wrxb
)
364 (sb!disassem
:define-arg-type width
365 :prefilter
#'prefilter-width
366 :printer
(lambda (value stream dstate
)
367 (declare (ignore value
))
368 (princ (schar (symbol-name (inst-operand-size dstate
)) 0)
371 ;;; Used to capture the effect of the #x66 operand size override prefix.
372 (sb!disassem
:define-arg-type x66
373 :prefilter
#'prefilter-x66
)
375 (sb!disassem
:define-arg-type displacement
377 :use-label
#'offset-next
378 :printer
(lambda (value stream dstate
)
379 (sb!disassem
:maybe-note-assembler-routine value nil dstate
)
380 (print-label value stream dstate
)))
382 (sb!disassem
:define-arg-type accum
383 :printer
(lambda (value stream dstate
)
384 (declare (ignore value
)
386 (type sb
!disassem
:disassem-state dstate
))
387 (print-reg 0 stream dstate
)))
389 (sb!disassem
:define-arg-type reg
390 :prefilter
#'prefilter-reg-r
391 :printer
#'print-reg
)
393 (sb!disassem
:define-arg-type reg-b
394 :prefilter
#'prefilter-reg-b
395 :printer
#'print-reg
)
397 (sb!disassem
:define-arg-type reg-b-default-qword
398 :prefilter
#'prefilter-reg-b
399 :printer
#'print-reg-default-qword
)
401 (sb!disassem
:define-arg-type imm-addr
402 :prefilter
#'read-address
403 :printer
#'print-label
)
405 ;;; Normally, immediate values for an operand size of :qword are of size
406 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
407 ;;; argument type definition following this one.
408 (sb!disassem
:define-arg-type signed-imm-data
409 :prefilter
(lambda (value dstate
)
410 (declare (ignore value
)) ; always nil anyway
411 (let ((width (width-bits (inst-operand-size dstate
))))
414 (sb!disassem
:read-signed-suffix width dstate
))))
416 ;;; Used by the variant of the MOV instruction with opcode B8 which can
417 ;;; move immediates of all sizes (i.e. including :qword) into a
419 (sb!disassem
:define-arg-type signed-imm-data-upto-qword
420 :prefilter
(lambda (value dstate
)
421 (declare (ignore value
)) ; always nil anyway
422 (sb!disassem
:read-signed-suffix
423 (width-bits (inst-operand-size dstate
))
426 ;;; Used by those instructions that have a default operand size of
427 ;;; :qword. Nevertheless the immediate is at most of size :dword.
428 ;;; The only instruction of this kind having a variant with an immediate
429 ;;; argument is PUSH.
430 (sb!disassem
:define-arg-type signed-imm-data-default-qword
431 :prefilter
(lambda (value dstate
)
432 (declare (ignore value
)) ; always nil anyway
433 (let ((width (width-bits
434 (inst-operand-size-default-qword dstate
))))
437 (sb!disassem
:read-signed-suffix width dstate
))))
439 (sb!disassem
:define-arg-type signed-imm-byte
440 :prefilter
(lambda (value dstate
)
441 (declare (ignore value
)) ; always nil anyway
442 (sb!disassem
:read-signed-suffix
8 dstate
)))
444 (sb!disassem
:define-arg-type imm-byte
445 :prefilter
(lambda (value dstate
)
446 (declare (ignore value
)) ; always nil anyway
447 (sb!disassem
:read-suffix
8 dstate
)))
449 ;;; needed for the ret imm16 instruction
450 (sb!disassem
:define-arg-type imm-word-16
451 :prefilter
(lambda (value dstate
)
452 (declare (ignore value
)) ; always nil anyway
453 (sb!disassem
:read-suffix
16 dstate
)))
455 (sb!disassem
:define-arg-type reg
/mem
456 :prefilter
#'prefilter-reg
/mem
457 :printer
#'print-reg
/mem
)
458 (sb!disassem
:define-arg-type sized-reg
/mem
459 ;; Same as reg/mem, but prints an explicit size indicator for
460 ;; memory references.
461 :prefilter
#'prefilter-reg
/mem
462 :printer
#'print-sized-reg
/mem
)
464 ;;; Arguments of type reg/mem with a fixed size.
465 (sb!disassem
:define-arg-type sized-byte-reg
/mem
466 :prefilter
#'prefilter-reg
/mem
467 :printer
#'print-sized-byte-reg
/mem
)
468 (sb!disassem
:define-arg-type sized-word-reg
/mem
469 :prefilter
#'prefilter-reg
/mem
470 :printer
#'print-sized-word-reg
/mem
)
471 (sb!disassem
:define-arg-type sized-dword-reg
/mem
472 :prefilter
#'prefilter-reg
/mem
473 :printer
#'print-sized-dword-reg
/mem
)
475 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
476 (sb!disassem
:define-arg-type sized-reg
/mem-default-qword
477 :prefilter
#'prefilter-reg
/mem
478 :printer
#'print-sized-reg
/mem-default-qword
)
481 (sb!disassem
:define-arg-type xmmreg
482 :prefilter
#'prefilter-reg-r
483 :printer
#'print-xmmreg
)
485 (sb!disassem
:define-arg-type xmmreg
/mem
486 :prefilter
#'prefilter-reg
/mem
487 :printer
#'print-xmmreg
/mem
)
489 (sb!disassem
:define-arg-type sized-xmmreg
/mem
490 :prefilter
#'prefilter-reg
/mem
491 :printer
#'print-sized-xmmreg
/mem
)
494 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
495 (defparameter *conditions
*
498 (:b .
2) (:nae .
2) (:c .
2)
499 (:nb .
3) (:ae .
3) (:nc .
3)
500 (:eq .
4) (:e .
4) (:z .
4)
507 (:np .
11) (:po .
11)
508 (:l .
12) (:nge .
12)
509 (:nl .
13) (:ge .
13)
510 (:le .
14) (:ng .
14)
511 (:nle .
15) (:g .
15)))
512 (defparameter *condition-name-vec
*
513 (let ((vec (make-array 16 :initial-element nil
)))
514 (dolist (cond *conditions
*)
515 (when (null (aref vec
(cdr cond
)))
516 (setf (aref vec
(cdr cond
)) (car cond
))))
520 ;;; Set assembler parameters. (In CMU CL, this was done with
521 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
522 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
523 (setf sb
!assem
:*assem-scheduler-p
* nil
))
525 (sb!disassem
:define-arg-type condition-code
526 :printer
*condition-name-vec
*)
528 (defun conditional-opcode (condition)
529 (cdr (assoc condition
*conditions
* :test
#'eq
)))
531 ;;;; disassembler instruction formats
533 (eval-when (:compile-toplevel
:execute
)
534 (defun swap-if (direction field1 separator field2
)
535 `(:if
(,direction
:constant
0)
536 (,field1
,separator
,field2
)
537 (,field2
,separator
,field1
))))
539 (sb!disassem
:define-instruction-format
(byte 8 :default-printer
'(:name
))
540 (op :field
(byte 8 0))
545 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
546 ;;; operand size of :word.
547 (sb!disassem
:define-instruction-format
(x66-byte 16
548 :default-printer
'(:name
))
549 (x66 :field
(byte 8 0) :value
#x66
)
550 (op :field
(byte 8 8)))
552 ;;; A one-byte instruction with a REX prefix, used to indicate an
553 ;;; operand size of :qword. REX.W must be 1, the other three bits are
555 (sb!disassem
:define-instruction-format
(rex-byte 16
556 :default-printer
'(:name
))
557 (rex :field
(byte 5 3) :value
#b01001
)
558 (op :field
(byte 8 8)))
560 (sb!disassem
:define-instruction-format
(simple 8)
561 (op :field
(byte 7 1))
562 (width :field
(byte 1 0) :type
'width
)
567 (sb!disassem
:define-instruction-format
(rex-simple 16)
568 (rex :field
(byte 4 4) :value
#b0100
)
569 (wrxb :field
(byte 4 0) :type
'wrxb
)
570 (op :field
(byte 7 9))
571 (width :field
(byte 1 8) :type
'width
)
576 ;;; Same as simple, but with direction bit
577 (sb!disassem
:define-instruction-format
(simple-dir 8 :include
'simple
)
578 (op :field
(byte 6 2))
579 (dir :field
(byte 1 1)))
581 ;;; Same as simple, but with the immediate value occurring by default,
582 ;;; and with an appropiate printer.
583 (sb!disassem
:define-instruction-format
(accum-imm 8
585 :default-printer
'(:name
586 :tab accum
", " imm
))
587 (imm :type
'signed-imm-data
))
589 (sb!disassem
:define-instruction-format
(rex-accum-imm 16
591 :default-printer
'(:name
592 :tab accum
", " imm
))
593 (imm :type
'signed-imm-data
))
595 (sb!disassem
:define-instruction-format
(reg-no-width 8
596 :default-printer
'(:name
:tab reg
))
597 (op :field
(byte 5 3))
598 (reg :field
(byte 3 0) :type
'reg-b
)
603 (sb!disassem
:define-instruction-format
(rex-reg-no-width 16
604 :default-printer
'(:name
:tab reg
))
605 (rex :field
(byte 4 4) :value
#b0100
)
606 (wrxb :field
(byte 4 0) :type
'wrxb
)
607 (op :field
(byte 5 11))
608 (reg :field
(byte 3 8) :type
'reg-b
)
613 ;;; Same as reg-no-width, but with a default operand size of :qword.
614 (sb!disassem
:define-instruction-format
(reg-no-width-default-qword 8
615 :include
'reg-no-width
616 :default-printer
'(:name
:tab reg
))
617 (reg :type
'reg-b-default-qword
))
619 ;;; Same as rex-reg-no-width, but with a default operand size of :qword.
620 (sb!disassem
:define-instruction-format
(rex-reg-no-width-default-qword 16
621 :include
'rex-reg-no-width
622 :default-printer
'(:name
:tab reg
))
623 (reg :type
'reg-b-default-qword
))
625 ;;; Adds a width field to reg-no-width. Note that we can't use
626 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
627 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
628 ;;; the one for IMM to be able to determine the correct size of IMM.
629 (sb!disassem
:define-instruction-format
(reg 8
630 :default-printer
'(:name
:tab reg
))
631 (op :field
(byte 4 4))
632 (width :field
(byte 1 3) :type
'width
)
633 (reg :field
(byte 3 0) :type
'reg-b
)
638 (sb!disassem
:define-instruction-format
(rex-reg 16
639 :default-printer
'(:name
:tab reg
))
640 (rex :field
(byte 4 4) :value
#b0100
)
641 (wrxb :field
(byte 4 0) :type
'wrxb
)
642 (width :field
(byte 1 11) :type
'width
)
643 (op :field
(byte 4 12))
644 (reg :field
(byte 3 8) :type
'reg-b
)
649 (sb!disassem
:define-instruction-format
(two-bytes 16
650 :default-printer
'(:name
))
651 (op :fields
(list (byte 8 0) (byte 8 8))))
653 (sb!disassem
:define-instruction-format
(reg-reg/mem
16
655 `(:name
:tab reg
", " reg
/mem
))
656 (op :field
(byte 7 1))
657 (width :field
(byte 1 0) :type
'width
)
658 (reg/mem
:fields
(list (byte 2 14) (byte 3 8))
660 (reg :field
(byte 3 11) :type
'reg
)
664 (sb!disassem
:define-instruction-format
(rex-reg-reg/mem
24
666 `(:name
:tab reg
", " reg
/mem
))
667 (rex :field
(byte 4 4) :value
#b0100
)
668 (wrxb :field
(byte 4 0) :type
'wrxb
)
669 (width :field
(byte 1 8) :type
'width
)
670 (op :field
(byte 7 9))
671 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
673 (reg :field
(byte 3 19) :type
'reg
)
677 ;;; same as reg-reg/mem, but with direction bit
678 (sb!disassem
:define-instruction-format
(reg-reg/mem-dir
16
679 :include
'reg-reg
/mem
683 ,(swap-if 'dir
'reg
/mem
", " 'reg
)))
684 (op :field
(byte 6 2))
685 (dir :field
(byte 1 1)))
687 (sb!disassem
:define-instruction-format
(rex-reg-reg/mem-dir
24
688 :include
'rex-reg-reg
/mem
692 ,(swap-if 'dir
'reg
/mem
", " 'reg
)))
693 (op :field
(byte 6 10))
694 (dir :field
(byte 1 9)))
696 (sb!disassem
:define-instruction-format
(x66-reg-reg/mem-dir
24
700 ,(swap-if 'dir
'reg
/mem
", " 'reg
)))
701 (x66 :field
(byte 8 0) :type
'x66
:value
#x66
)
702 (op :field
(byte 6 10))
703 (dir :field
(byte 1 9))
704 (width :field
(byte 1 8) :type
'width
)
705 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
707 (reg :field
(byte 3 19) :type
'reg
))
709 (sb!disassem
:define-instruction-format
(x66-rex-reg-reg/mem-dir
32
713 ,(swap-if 'dir
'reg
/mem
", " 'reg
)))
714 (x66 :field
(byte 8 0) :type
'x66
:value
#x66
)
715 (rex :field
(byte 4 12) :value
#b0100
)
716 (wrxb :field
(byte 4 8) :type
'wrxb
)
717 (op :field
(byte 6 18))
718 (dir :field
(byte 1 17))
719 (width :field
(byte 1 16) :type
'width
)
720 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
722 (reg :field
(byte 3 27) :type
'reg
))
724 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
725 (sb!disassem
:define-instruction-format
(reg/mem
16
726 :default-printer
'(:name
:tab reg
/mem
))
727 (op :fields
(list (byte 7 1) (byte 3 11)))
728 (width :field
(byte 1 0) :type
'width
)
729 (reg/mem
:fields
(list (byte 2 14) (byte 3 8))
730 :type
'sized-reg
/mem
)
734 (sb!disassem
:define-instruction-format
(rex-reg/mem
24
735 :default-printer
'(:name
:tab reg
/mem
))
736 (rex :field
(byte 4 4) :value
#b0100
)
737 (wrxb :field
(byte 4 0) :type
'wrxb
)
738 (op :fields
(list (byte 7 9) (byte 3 19)))
739 (width :field
(byte 1 8) :type
'width
)
740 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
741 :type
'sized-reg
/mem
)
745 ;;; Same as reg/mem, but without a width field and with a default
746 ;;; operand size of :qword.
747 (sb!disassem
:define-instruction-format
(reg/mem-default-qword
16
748 :default-printer
'(:name
:tab reg
/mem
))
749 (op :fields
(list (byte 8 0) (byte 3 11)))
750 (reg/mem
:fields
(list (byte 2 14) (byte 3 8))
751 :type
'sized-reg
/mem-default-qword
))
753 (sb!disassem
:define-instruction-format
(rex-reg/mem-default-qword
24
754 :default-printer
'(:name
:tab reg
/mem
))
755 (rex :field
(byte 4 4) :value
#b0100
)
756 (wrxb :field
(byte 4 0) :type
'wrxb
)
757 (op :fields
(list (byte 8 8) (byte 3 19)))
758 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
759 :type
'sized-reg
/mem-default-qword
))
761 ;;; Same as reg/mem, but with the immediate value occurring by default,
762 ;;; and with an appropiate printer.
763 (sb!disassem
:define-instruction-format
(reg/mem-imm
16
766 '(:name
:tab reg
/mem
", " imm
))
767 (reg/mem
:type
'sized-reg
/mem
)
768 (imm :type
'signed-imm-data
))
770 (sb!disassem
:define-instruction-format
(rex-reg/mem-imm
24
771 :include
'rex-reg
/mem
773 '(:name
:tab reg
/mem
", " imm
))
774 (reg/mem
:type
'sized-reg
/mem
)
775 (imm :type
'signed-imm-data
))
777 ;;; Same as reg/mem, but with using the accumulator in the default printer
778 (sb!disassem
:define-instruction-format
780 :include
'reg
/mem
:default-printer
'(:name
:tab accum
", " reg
/mem
))
781 (reg/mem
:type
'reg
/mem
) ; don't need a size
782 (accum :type
'accum
))
784 (sb!disassem
:define-instruction-format
(rex-accum-reg/mem
24
785 :include
'rex-reg
/mem
787 '(:name
:tab accum
", " reg
/mem
))
788 (reg/mem
:type
'reg
/mem
) ; don't need a size
789 (accum :type
'accum
))
791 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
792 (sb!disassem
:define-instruction-format
(ext-reg-reg/mem
24
794 `(:name
:tab reg
", " reg
/mem
))
795 (prefix :field
(byte 8 0) :value
#b00001111
)
796 (op :field
(byte 7 9))
797 (width :field
(byte 1 8) :type
'width
)
798 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
800 (reg :field
(byte 3 19) :type
'reg
)
804 (sb!disassem
:define-instruction-format
(ext-reg-reg/mem-no-width
24
806 `(:name
:tab reg
", " reg
/mem
))
807 (prefix :field
(byte 8 0) :value
#b00001111
)
808 (op :field
(byte 8 8))
809 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
811 (reg :field
(byte 3 19) :type
'reg
))
813 (sb!disassem
:define-instruction-format
(rex-ext-reg-reg/mem-no-width
32
815 `(:name
:tab reg
", " reg
/mem
))
816 (rex :field
(byte 4 4) :value
#b0100
)
817 (wrxb :field
(byte 4 0) :type
'wrxb
)
818 (prefix :field
(byte 8 8) :value
#b00001111
)
819 (op :field
(byte 8 16))
820 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
822 (reg :field
(byte 3 27) :type
'reg
))
824 ;;; reg-no-width with #x0f prefix
825 (sb!disassem
:define-instruction-format
(ext-reg-no-width 16
826 :default-printer
'(:name
:tab reg
))
827 (prefix :field
(byte 8 0) :value
#b00001111
)
828 (op :field
(byte 5 11))
829 (reg :field
(byte 3 8) :type
'reg-b
))
831 ;;; Same as reg/mem, but with a prefix of #b00001111
832 (sb!disassem
:define-instruction-format
(ext-reg/mem
24
833 :default-printer
'(:name
:tab reg
/mem
))
834 (prefix :field
(byte 8 0) :value
#b00001111
)
835 (op :fields
(list (byte 7 9) (byte 3 19)))
836 (width :field
(byte 1 8) :type
'width
)
837 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
838 :type
'sized-reg
/mem
)
842 (sb!disassem
:define-instruction-format
(ext-reg/mem-imm
24
843 :include
'ext-reg
/mem
845 '(:name
:tab reg
/mem
", " imm
))
846 (imm :type
'signed-imm-data
))
848 ;;;; XMM instructions
850 ;;; All XMM instructions use an extended opcode (#x0F as the first
851 ;;; opcode byte). Therefore in the following "EXT" in the name of the
852 ;;; instruction formats refers to the formats that have an additional
853 ;;; prefix (#x66, #xF2 or #xF3).
855 ;;; Instructions having an XMM register as the destination operand
856 ;;; and an XMM register or a memory location as the source operand.
857 ;;; The size of the operands is implicitly given by the instruction.
858 (sb!disassem
:define-instruction-format
(xmm-xmm/mem
24
860 '(:name
:tab reg
", " reg
/mem
))
861 (x0f :field
(byte 8 0) :value
#x0f
)
862 (op :field
(byte 8 8))
863 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
865 (reg :field
(byte 3 19) :type
'xmmreg
))
867 (sb!disassem
:define-instruction-format
(rex-xmm-xmm/mem
32
869 '(:name
:tab reg
", " reg
/mem
))
870 (x0f :field
(byte 8 0) :value
#x0f
)
871 (rex :field
(byte 4 12) :value
#b0100
)
872 (wrxb :field
(byte 4 8) :type
'wrxb
)
873 (op :field
(byte 8 16))
874 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
876 (reg :field
(byte 3 27) :type
'xmmreg
))
878 (sb!disassem
:define-instruction-format
(ext-xmm-xmm/mem
32
880 '(:name
:tab reg
", " reg
/mem
))
881 (prefix :field
(byte 8 0))
882 (x0f :field
(byte 8 8) :value
#x0f
)
883 (op :field
(byte 8 16))
884 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
886 (reg :field
(byte 3 27) :type
'xmmreg
))
888 (sb!disassem
:define-instruction-format
(ext-rex-xmm-xmm/mem
40
890 '(:name
:tab reg
", " reg
/mem
))
891 (prefix :field
(byte 8 0))
892 (rex :field
(byte 4 12) :value
#b0100
)
893 (wrxb :field
(byte 4 8) :type
'wrxb
)
894 (x0f :field
(byte 8 16) :value
#x0f
)
895 (op :field
(byte 8 24))
896 (reg/mem
:fields
(list (byte 2 38) (byte 3 32))
898 (reg :field
(byte 3 35) :type
'xmmreg
))
900 ;;; Same as xmm-xmm/mem etc., but with direction bit.
902 (sb!disassem
:define-instruction-format
(ext-xmm-xmm/mem-dir
32
903 :include
'ext-xmm-xmm
/mem
907 ,(swap-if 'dir
'reg
", " 'reg
/mem
)))
908 (op :field
(byte 7 17))
909 (dir :field
(byte 1 16)))
911 (sb!disassem
:define-instruction-format
(ext-rex-xmm-xmm/mem-dir
40
912 :include
'ext-rex-xmm-xmm
/mem
916 ,(swap-if 'dir
'reg
", " 'reg
/mem
)))
917 (op :field
(byte 7 25))
918 (dir :field
(byte 1 24)))
920 ;;; Instructions having an XMM register as one operand and a general-
921 ;;; -purpose register or a memory location as the other operand.
923 (sb!disassem
:define-instruction-format
(ext-xmm-reg/mem
32
925 '(:name
:tab reg
", " reg
/mem
))
926 (prefix :field
(byte 8 0))
927 (x0f :field
(byte 8 8) :value
#x0f
)
928 (op :field
(byte 8 16))
929 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
930 :type
'sized-reg
/mem
)
931 (reg :field
(byte 3 27) :type
'xmmreg
))
933 (sb!disassem
:define-instruction-format
(ext-rex-xmm-reg/mem
40
935 '(:name
:tab reg
", " reg
/mem
))
936 (prefix :field
(byte 8 0))
937 (rex :field
(byte 4 12) :value
#b0100
)
938 (wrxb :field
(byte 4 8) :type
'wrxb
)
939 (x0f :field
(byte 8 16) :value
#x0f
)
940 (op :field
(byte 8 24))
941 (reg/mem
:fields
(list (byte 2 38) (byte 3 32))
942 :type
'sized-reg
/mem
)
943 (reg :field
(byte 3 35) :type
'xmmreg
))
945 ;;; Instructions having a general-purpose register as one operand and an
946 ;;; XMM register or a memory location as the other operand.
948 (sb!disassem
:define-instruction-format
(ext-reg-xmm/mem
32
950 '(:name
:tab reg
", " reg
/mem
))
951 (prefix :field
(byte 8 0))
952 (x0f :field
(byte 8 8) :value
#x0f
)
953 (op :field
(byte 8 16))
954 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
955 :type
'sized-xmmreg
/mem
)
956 (reg :field
(byte 3 27) :type
'reg
))
958 (sb!disassem
:define-instruction-format
(ext-rex-reg-xmm/mem
40
960 '(:name
:tab reg
", " reg
/mem
))
961 (prefix :field
(byte 8 0))
962 (rex :field
(byte 4 12) :value
#b0100
)
963 (wrxb :field
(byte 4 8) :type
'wrxb
)
964 (x0f :field
(byte 8 16) :value
#x0f
)
965 (op :field
(byte 8 24))
966 (reg/mem
:fields
(list (byte 2 38) (byte 3 32))
967 :type
'sized-xmmreg
/mem
)
968 (reg :field
(byte 3 35) :type
'reg
))
970 (sb!disassem
:define-instruction-format
(string-op 8
972 :default-printer
'(:name width
)))
974 (sb!disassem
:define-instruction-format
(rex-string-op 16
976 :default-printer
'(:name width
)))
978 (sb!disassem
:define-instruction-format
(short-cond-jump 16)
979 (op :field
(byte 4 4))
980 (cc :field
(byte 4 0) :type
'condition-code
)
981 (label :field
(byte 8 8) :type
'displacement
))
983 (sb!disassem
:define-instruction-format
(short-jump 16
984 :default-printer
'(:name
:tab label
))
985 (const :field
(byte 4 4) :value
#b1110
)
986 (op :field
(byte 4 0))
987 (label :field
(byte 8 8) :type
'displacement
))
989 (sb!disassem
:define-instruction-format
(near-cond-jump 16)
990 (op :fields
(list (byte 8 0) (byte 4 12)) :value
'(#b00001111
#b1000
))
991 (cc :field
(byte 4 8) :type
'condition-code
)
992 ;; The disassembler currently doesn't let you have an instruction > 32 bits
993 ;; long, so we fake it by using a prefilter to read the offset.
994 (label :type
'displacement
995 :prefilter
(lambda (value dstate
)
996 (declare (ignore value
)) ; always nil anyway
997 (sb!disassem
:read-signed-suffix
32 dstate
))))
999 (sb!disassem
:define-instruction-format
(near-jump 8
1000 :default-printer
'(:name
:tab label
))
1001 (op :field
(byte 8 0))
1002 ;; The disassembler currently doesn't let you have an instruction > 32 bits
1003 ;; long, so we fake it by using a prefilter to read the address.
1004 (label :type
'displacement
1005 :prefilter
(lambda (value dstate
)
1006 (declare (ignore value
)) ; always nil anyway
1007 (sb!disassem
:read-signed-suffix
32 dstate
))))
1010 (sb!disassem
:define-instruction-format
(cond-set 24
1011 :default-printer
'('set cc
:tab reg
/mem
))
1012 (prefix :field
(byte 8 0) :value
#b00001111
)
1013 (op :field
(byte 4 12) :value
#b1001
)
1014 (cc :field
(byte 4 8) :type
'condition-code
)
1015 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
1016 :type
'sized-byte-reg
/mem
)
1017 (reg :field
(byte 3 19) :value
#b000
))
1019 (sb!disassem
:define-instruction-format
(cond-move 24
1021 '('cmov cc
:tab reg
", " reg
/mem
))
1022 (prefix :field
(byte 8 0) :value
#b00001111
)
1023 (op :field
(byte 4 12) :value
#b0100
)
1024 (cc :field
(byte 4 8) :type
'condition-code
)
1025 (reg/mem
:fields
(list (byte 2 22) (byte 3 16))
1027 (reg :field
(byte 3 19) :type
'reg
))
1029 (sb!disassem
:define-instruction-format
(rex-cond-move 32
1031 '('cmov cc
:tab reg
", " reg
/mem
))
1032 (rex :field
(byte 4 4) :value
#b0100
)
1033 (wrxb :field
(byte 4 0) :type
'wrxb
)
1034 (prefix :field
(byte 8 8) :value
#b00001111
)
1035 (op :field
(byte 4 20) :value
#b0100
)
1036 (cc :field
(byte 4 16) :type
'condition-code
)
1037 (reg/mem
:fields
(list (byte 2 30) (byte 3 24))
1039 (reg :field
(byte 3 27) :type
'reg
))
1041 (sb!disassem
:define-instruction-format
(enter-format 32
1042 :default-printer
'(:name
1044 (:unless
(:constant
0)
1046 (op :field
(byte 8 0))
1047 (disp :field
(byte 16 8))
1048 (level :field
(byte 8 24)))
1050 ;;; Single byte instruction with an immediate byte argument.
1051 (sb!disassem
:define-instruction-format
(byte-imm 16
1052 :default-printer
'(:name
:tab code
))
1053 (op :field
(byte 8 0))
1054 (code :field
(byte 8 8)))
1056 ;;; Two byte instruction with an immediate byte argument.
1058 (sb!disassem
:define-instruction-format
(word-imm 24
1059 :default-printer
'(:name
:tab code
))
1060 (op :field
(byte 16 0))
1061 (code :field
(byte 8 16)))
1064 ;;;; primitive emitters
1066 (define-bitfield-emitter emit-word
16
1069 (define-bitfield-emitter emit-dword
32
1072 ;;; Most uses of dwords are as displacements or as immediate values in
1073 ;;; 64-bit operations. In these cases they are sign-extended to 64 bits.
1074 ;;; EMIT-DWORD is unsuitable there because it accepts values of type
1075 ;;; (OR (SIGNED-BYTE 32) (UNSIGNED-BYTE 32)), so we provide a more
1076 ;;; restricted emitter here.
1077 (defun emit-signed-dword (segment value
)
1078 (declare (type segment segment
)
1079 (type (signed-byte 32) value
))
1080 (declare (inline emit-dword
))
1081 (emit-dword segment value
))
1083 (define-bitfield-emitter emit-qword
64
1086 (define-bitfield-emitter emit-byte-with-reg
8
1087 (byte 5 3) (byte 3 0))
1089 (define-bitfield-emitter emit-mod-reg-r
/m-byte
8
1090 (byte 2 6) (byte 3 3) (byte 3 0))
1092 (define-bitfield-emitter emit-sib-byte
8
1093 (byte 2 6) (byte 3 3) (byte 3 0))
1095 (define-bitfield-emitter emit-rex-byte
8
1096 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1102 (defun emit-absolute-fixup (segment fixup
&optional quad-p
)
1103 (note-fixup segment
(if quad-p
:absolute64
:absolute
) fixup
)
1104 (let ((offset (fixup-offset fixup
)))
1105 (if (label-p offset
)
1106 (emit-back-patch segment
1108 (lambda (segment posn
)
1109 (declare (ignore posn
))
1110 (let ((val (- (+ (component-header-length)
1111 (or (label-position offset
)
1113 other-pointer-lowtag
)))
1115 (emit-qword segment val
)
1116 (emit-signed-dword segment val
)))))
1118 (emit-qword segment
(or offset
0))
1119 (emit-signed-dword segment
(or offset
0))))))
1121 (defun emit-relative-fixup (segment fixup
)
1122 (note-fixup segment
:relative fixup
)
1123 (emit-signed-dword segment
(or (fixup-offset fixup
) 0)))
1126 ;;;; the effective-address (ea) structure
1128 (defun reg-tn-encoding (tn)
1129 (declare (type tn tn
))
1130 ;; ea only has space for three bits of register number: regs r8
1131 ;; and up are selected by a REX prefix byte which caller is responsible
1132 ;; for having emitted where necessary already
1133 (ecase (sb-name (sc-sb (tn-sc tn
)))
1135 (let ((offset (mod (tn-offset tn
) 16)))
1136 (logior (ash (logand offset
1) 2)
1139 (mod (tn-offset tn
) 8))))
1141 (defstruct (ea (:constructor make-ea
(size &key base index scale disp
))
1143 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1144 ;; can't actually emit it on its own: caller also needs to emit REX
1146 (size nil
:type
(member :byte
:word
:dword
:qword
))
1147 (base nil
:type
(or tn null
))
1148 (index nil
:type
(or tn null
))
1149 (scale 1 :type
(member 1 2 4 8))
1150 (disp 0 :type
(or (unsigned-byte 32) (signed-byte 32) fixup
)))
1151 (def!method print-object
((ea ea
) stream
)
1152 (cond ((or *print-escape
* *print-readably
*)
1153 (print-unreadable-object (ea stream
:type t
)
1155 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1159 (let ((scale (ea-scale ea
)))
1160 (if (= scale
1) nil scale
))
1163 (format stream
"~A PTR [" (symbol-name (ea-size ea
)))
1165 (write-string (sb!c
::location-print-name
(ea-base ea
)) stream
)
1167 (write-string "+" stream
)))
1169 (write-string (sb!c
::location-print-name
(ea-index ea
)) stream
))
1170 (unless (= (ea-scale ea
) 1)
1171 (format stream
"*~A" (ea-scale ea
)))
1172 (typecase (ea-disp ea
)
1175 (format stream
"~@D" (ea-disp ea
)))
1177 (format stream
"+~A" (ea-disp ea
))))
1178 (write-char #\
] stream
))))
1180 (defun emit-constant-tn-rip (segment constant-tn reg
)
1181 ;; AMD64 doesn't currently have a code object register to use as a
1182 ;; base register for constant access. Instead we use RIP-relative
1183 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1184 ;; is passed to the backpatch callback. In addition we need the offset
1185 ;; from the start of the function header to the slot in the CODE-HEADER
1186 ;; that stores the constant. Since we don't know where the code header
1187 ;; starts, instead count backwards from the function header.
1188 (let* ((2comp (component-info *component-being-compiled
*))
1189 (constants (ir2-component-constants 2comp
))
1190 (len (length constants
))
1191 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1192 ;; If there are an even amount of constants, there will be
1193 ;; an extra qword of padding before the function header, which
1194 ;; needs to be adjusted for. XXX: This will break if new slots
1195 ;; are added to the code header.
1196 (offset (* (- (+ len
(if (evenp len
)
1199 (tn-offset constant-tn
))
1201 ;; RIP-relative addressing
1202 (emit-mod-reg-r/m-byte segment
#b00 reg
#b101
)
1203 (emit-back-patch segment
1205 (lambda (segment posn
)
1206 ;; The addressing is relative to end of instruction,
1207 ;; i.e. the end of this dword. Hence the + 4.
1208 (emit-signed-dword segment
1209 (+ 4 (- (+ offset posn
)))))))
1212 (defun emit-label-rip (segment fixup reg
)
1213 (let ((label (fixup-offset fixup
)))
1214 ;; RIP-relative addressing
1215 (emit-mod-reg-r/m-byte segment
#b00 reg
#b101
)
1216 (emit-back-patch segment
1218 (lambda (segment posn
)
1219 (emit-signed-dword segment
(- (label-position label
)
1223 (defun emit-ea (segment thing reg
&optional allow-constants
)
1226 ;; this would be eleganter if we had a function that would create
1228 (ecase (sb-name (sc-sb (tn-sc thing
)))
1229 ((registers float-registers
)
1230 (emit-mod-reg-r/m-byte segment
#b11 reg
(reg-tn-encoding thing
)))
1232 ;; Convert stack tns into an index off RBP.
1233 (let ((disp (- (* (1+ (tn-offset thing
)) n-word-bytes
))))
1234 (cond ((<= -
128 disp
127)
1235 (emit-mod-reg-r/m-byte segment
#b01 reg
#b101
)
1236 (emit-byte segment disp
))
1238 (emit-mod-reg-r/m-byte segment
#b10 reg
#b101
)
1239 (emit-signed-dword segment disp
)))))
1241 (unless allow-constants
1244 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1245 (emit-constant-tn-rip segment thing reg
))))
1247 (let* ((base (ea-base thing
))
1248 (index (ea-index thing
))
1249 (scale (ea-scale thing
))
1250 (disp (ea-disp thing
))
1251 (mod (cond ((or (null base
)
1253 (not (= (reg-tn-encoding base
) #b101
))))
1255 ((and (fixnump disp
) (<= -
128 disp
127))
1259 (r/m
(cond (index #b100
)
1261 (t (reg-tn-encoding base
)))))
1262 (when (and (= mod
0) (= r
/m
#b101
))
1263 ;; this is rip-relative in amd64, so we'll use a sib instead
1264 (setf r
/m
#b100 scale
1))
1265 (emit-mod-reg-r/m-byte segment mod reg r
/m
)
1267 (let ((ss (1- (integer-length scale
)))
1268 (index (if (null index
)
1270 (let ((index (reg-tn-encoding index
)))
1272 (error "can't index off of ESP")
1274 (base (if (null base
)
1276 (reg-tn-encoding base
))))
1277 (emit-sib-byte segment ss index base
)))
1279 (emit-byte segment disp
))
1280 ((or (= mod
#b10
) (null base
))
1282 (emit-absolute-fixup segment disp
)
1283 (emit-signed-dword segment disp
))))))
1285 (typecase (fixup-offset thing
)
1287 (emit-label-rip segment thing reg
))
1289 (emit-mod-reg-r/m-byte segment
#b00 reg
#b100
)
1290 (emit-sib-byte segment
0 #b100
#b101
)
1291 (emit-absolute-fixup segment thing
))))))
1293 (defun byte-reg-p (thing)
1295 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
1296 (member (sc-name (tn-sc thing
)) *byte-sc-names
*)
1299 (defun byte-ea-p (thing)
1301 (ea (eq (ea-size thing
) :byte
))
1303 (and (member (sc-name (tn-sc thing
)) *byte-sc-names
*) t
))
1306 (defun word-reg-p (thing)
1308 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
1309 (member (sc-name (tn-sc thing
)) *word-sc-names
*)
1312 (defun word-ea-p (thing)
1314 (ea (eq (ea-size thing
) :word
))
1315 (tn (and (member (sc-name (tn-sc thing
)) *word-sc-names
*) t
))
1318 (defun dword-reg-p (thing)
1320 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
1321 (member (sc-name (tn-sc thing
)) *dword-sc-names
*)
1324 (defun dword-ea-p (thing)
1326 (ea (eq (ea-size thing
) :dword
))
1328 (and (member (sc-name (tn-sc thing
)) *dword-sc-names
*) t
))
1331 (defun qword-reg-p (thing)
1333 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)
1334 (member (sc-name (tn-sc thing
)) *qword-sc-names
*)
1337 (defun qword-ea-p (thing)
1339 (ea (eq (ea-size thing
) :qword
))
1341 (and (member (sc-name (tn-sc thing
)) *qword-sc-names
*) t
))
1344 ;;; Return true if THING is a general-purpose register TN.
1345 (defun register-p (thing)
1347 (eq (sb-name (sc-sb (tn-sc thing
))) 'registers
)))
1349 (defun accumulator-p (thing)
1350 (and (register-p thing
)
1351 (= (tn-offset thing
) 0)))
1353 ;;; Return true if THING is an XMM register TN.
1354 (defun xmm-register-p (thing)
1356 (eq (sb-name (sc-sb (tn-sc thing
))) 'float-registers
)))
1361 (def!constant
+operand-size-prefix-byte
+ #b01100110
)
1363 (defun maybe-emit-operand-size-prefix (segment size
)
1364 (unless (or (eq size
:byte
)
1365 (eq size
:qword
) ; REX prefix handles this
1366 (eq size
+default-operand-size
+))
1367 (emit-byte segment
+operand-size-prefix-byte
+)))
1369 ;;; A REX prefix must be emitted if at least one of the following
1370 ;;; conditions is true:
1371 ;; 1. The operand size is :QWORD and the default operand size of the
1372 ;; instruction is not :QWORD.
1373 ;;; 2. The instruction references an extended register.
1374 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1377 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1378 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1379 ;;; this should not happen, for example because the instruction's
1380 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1381 ;;; registers the encodings of which are extended with the REX.R, REX.X
1382 ;;; and REX.B bit, respectively. To determine whether one of the byte
1383 ;;; registers is used that can only be accessed using a REX prefix, we
1384 ;;; need only to test R and B, because X is only used for the index
1385 ;;; register of an effective address and therefore never byte-sized.
1386 ;;; For R we can avoid to calculate the size of the TN because it is
1387 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1388 ;;; B can be address-sized (if it is the base register of an effective
1389 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1390 ;;; registers) or of some different size (in the instructions that
1391 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1392 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1393 ;;; between general-purpose and floating point registers for this cause
1394 ;;; because only general-purpose registers can be byte-sized at all.
1395 (defun maybe-emit-rex-prefix (segment operand-size r x b
)
1396 (declare (type (member nil
:byte
:word
:dword
:qword
:do-not-set
)
1398 (type (or null tn
) r x b
))
1400 (if (and r
(> (tn-offset r
)
1401 ;; offset of r8 is 16, offset of xmm8 is 8
1402 (if (eq (sb-name (sc-sb (tn-sc r
)))
1409 ;; Assuming R is a TN describing a general-purpose
1410 ;; register, return true if it references register
1412 (<= 8 (tn-offset r
) 15)))
1413 (let ((rex-w (if (eq operand-size
:qword
) 1 0))
1417 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b
)))
1419 (eq operand-size
:byte
)
1422 (eq (operand-size b
) :byte
)
1424 (emit-rex-byte segment
#b0100 rex-w rex-r rex-x rex-b
)))))
1426 ;;; Emit a REX prefix if necessary. The operand size is determined from
1427 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1428 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1429 ;;; pass its index and base registers, if it is a register TN, we pass
1431 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1432 ;;; be treated specially here: If THING is a stack TN, neither it nor
1433 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1434 ;;; works correctly because stack references always use RBP as the base
1435 ;;; register and never use an index register so no extended registers
1436 ;;; need to be accessed. Fixups are assembled using an addressing mode
1437 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1438 ;;; not reference an extended register. The displacement-only addressing
1439 ;;; mode requires that REX.X is 0, which is ensured here.
1440 (defun maybe-emit-rex-for-ea (segment thing reg
&key operand-size
)
1441 (declare (type (or ea tn fixup
) thing
)
1442 (type (or null tn
) reg
)
1443 (type (member nil
:byte
:word
:dword
:qword
:do-not-set
)
1445 (let ((ea-p (ea-p thing
)))
1446 (maybe-emit-rex-prefix segment
1447 (or operand-size
(operand-size thing
))
1449 (and ea-p
(ea-index thing
))
1450 (cond (ea-p (ea-base thing
))
1452 (member (sb-name (sc-sb (tn-sc thing
)))
1453 '(float-registers registers
)))
1457 (defun operand-size (thing)
1460 ;; FIXME: might as well be COND instead of having to use #. readmacro
1461 ;; to hack up the code
1462 (case (sc-name (tn-sc thing
))
1471 ;; added by jrd: float-registers is a separate size (?)
1472 ;; The only place in the code where we are called with THING
1473 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1474 ;; checks whether THING is a byte register. Thus our result in
1475 ;; these cases could as well be :dword and :qword. I leave it as
1476 ;; :float and :double which is more likely to trigger an aver
1477 ;; instead of silently doing the wrong thing in case this
1478 ;; situation should change. Lutz Euler, 2005-10-23.
1481 (#.
*double-sc-names
*
1484 (error "can't tell the size of ~S ~S" thing
(sc-name (tn-sc thing
))))))
1488 ;; GNA. Guess who spelt "flavor" correctly first time round?
1489 ;; There's a strong argument in my mind to change all uses of
1490 ;; "flavor" to "kind": and similarly with some misguided uses of
1491 ;; "type" here and there. -- CSR, 2005-01-06.
1492 (case (fixup-flavor thing
)
1493 ((:foreign-dataref
) :qword
)))
1497 (defun matching-operand-size (dst src
)
1498 (let ((dst-size (operand-size dst
))
1499 (src-size (operand-size src
)))
1502 (if (eq dst-size src-size
)
1504 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1505 dst dst-size src src-size
))
1509 (error "can't tell the size of either ~S or ~S" dst src
)))))
1511 ;;; Except in a very few cases (MOV instructions A1, A3 and B8 - BF)
1512 ;;; we expect dword data bytes even when 64 bit work is being done.
1513 ;;; But A1 and A3 are currently unused and B8 - BF use EMIT-QWORD
1514 ;;; directly, so we emit all quad constants as dwords, additionally
1515 ;;; making sure that they survive the sign-extension to 64 bits
1517 (defun emit-sized-immediate (segment size value
)
1520 (emit-byte segment value
))
1522 (emit-word segment value
))
1524 (emit-dword segment value
))
1526 (emit-signed-dword segment value
))))
1528 ;;;; general data transfer
1530 ;;; This is the part of the MOV instruction emitter that does moving
1531 ;;; of an immediate value into a qword register. We go to some length
1532 ;;; to achieve the shortest possible encoding.
1533 (defun emit-immediate-move-to-qword-register (segment dst src
)
1534 (declare (type integer src
))
1535 (cond ((typep src
'(unsigned-byte 32))
1536 ;; We use the B8 - BF encoding with an operand size of 32 bits
1537 ;; here and let the implicit zero-extension fill the upper half
1538 ;; of the 64-bit destination register. Instruction size: five
1539 ;; or six bytes. (A REX prefix will be emitted only if the
1540 ;; destination is an extended register.)
1541 (maybe-emit-rex-prefix segment
:dword nil nil dst
)
1542 (emit-byte-with-reg segment
#b10111
(reg-tn-encoding dst
))
1543 (emit-dword segment src
))
1545 (maybe-emit-rex-prefix segment
:qword nil nil dst
)
1546 (cond ((typep src
'(signed-byte 32))
1547 ;; Use the C7 encoding that takes a 32-bit immediate and
1548 ;; sign-extends it to 64 bits. Instruction size: seven
1550 (emit-byte segment
#b11000111
)
1551 (emit-mod-reg-r/m-byte segment
#b11
#b000
1552 (reg-tn-encoding dst
))
1553 (emit-signed-dword segment src
))
1554 ((<= (- (expt 2 64) (expt 2 31))
1557 ;; This triggers on positive integers of 64 bits length
1558 ;; with the most significant 33 bits being 1. We use the
1559 ;; same encoding as in the previous clause.
1560 (emit-byte segment
#b11000111
)
1561 (emit-mod-reg-r/m-byte segment
#b11
#b000
1562 (reg-tn-encoding dst
))
1563 (emit-signed-dword segment
(- src
(expt 2 64))))
1565 ;; We need a full 64-bit immediate. Instruction size:
1567 (emit-byte-with-reg segment
#b10111
(reg-tn-encoding dst
))
1568 (emit-qword segment src
))))))
1570 (define-instruction mov
(segment dst src
)
1571 ;; immediate to register
1572 (:printer reg
((op #b1011
) (imm nil
:type
'signed-imm-data
))
1573 '(:name
:tab reg
", " imm
))
1574 (:printer rex-reg
((op #b1011
) (imm nil
:type
'signed-imm-data-upto-qword
))
1575 '(:name
:tab reg
", " imm
))
1576 ;; absolute mem to/from accumulator
1577 (:printer simple-dir
((op #b101000
) (imm nil
:type
'imm-addr
))
1578 `(:name
:tab
,(swap-if 'dir
'accum
", " '("[" imm
"]"))))
1579 ;; register to/from register/memory
1580 (:printer reg-reg
/mem-dir
((op #b100010
)))
1581 (:printer rex-reg-reg
/mem-dir
((op #b100010
)))
1582 (:printer x66-reg-reg
/mem-dir
((op #b100010
)))
1583 (:printer x66-rex-reg-reg
/mem-dir
((op #b100010
)))
1584 ;; immediate to register/memory
1585 (:printer reg
/mem-imm
((op '(#b1100011
#b000
))))
1586 (:printer rex-reg
/mem-imm
((op '(#b1100011
#b000
))))
1589 (let ((size (matching-operand-size dst src
)))
1590 (maybe-emit-operand-size-prefix segment size
)
1591 (cond ((register-p dst
)
1592 (cond ((integerp src
)
1593 (cond ((eq size
:qword
)
1594 (emit-immediate-move-to-qword-register segment
1597 (maybe-emit-rex-prefix segment size nil nil dst
)
1598 (emit-byte-with-reg segment
1602 (reg-tn-encoding dst
))
1603 (emit-sized-immediate segment size src
))))
1605 (maybe-emit-rex-for-ea segment src dst
)
1610 (emit-ea segment src
(reg-tn-encoding dst
) t
))))
1612 ;; C7 only deals with 32 bit immediates even if the
1613 ;; destination is a 64-bit location. The value is
1614 ;; sign-extended in this case.
1615 (maybe-emit-rex-for-ea segment dst nil
)
1616 (emit-byte segment
(if (eq size
:byte
) #b11000110
#b11000111
))
1617 (emit-ea segment dst
#b000
)
1618 (emit-sized-immediate segment size src
))
1620 (maybe-emit-rex-for-ea segment dst src
)
1621 (emit-byte segment
(if (eq size
:byte
) #b10001000
#b10001001
))
1622 (emit-ea segment dst
(reg-tn-encoding src
)))
1624 ;; Generally we can't MOV a fixupped value into an EA, since
1625 ;; MOV on non-registers can only take a 32-bit immediate arg.
1626 ;; Make an exception for :FOREIGN fixups (pretty much just
1627 ;; the runtime asm, since other foreign calls go through the
1628 ;; the linkage table) and for linkage table references, since
1629 ;; these should always end up in low memory.
1630 (aver (or (eq (fixup-flavor src
) :foreign
)
1631 (eq (fixup-flavor src
) :foreign-dataref
)
1632 (eq (ea-size dst
) :dword
)))
1633 (maybe-emit-rex-for-ea segment dst nil
)
1634 (emit-byte segment
#b11000111
)
1635 (emit-ea segment dst
#b000
)
1636 (emit-absolute-fixup segment src
))
1638 (error "bogus arguments to MOV: ~S ~S" dst src
))))))
1640 (defun emit-move-with-extension (segment dst src signed-p
)
1641 (aver (register-p dst
))
1642 (let ((dst-size (operand-size dst
))
1643 (src-size (operand-size src
))
1644 (opcode (if signed-p
#b10111110
#b10110110
)))
1647 (aver (eq src-size
:byte
))
1648 (maybe-emit-operand-size-prefix segment
:word
)
1649 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1650 (maybe-emit-rex-for-ea segment src dst
:operand-size
:word
)
1651 (emit-byte segment
#b00001111
)
1652 (emit-byte segment opcode
)
1653 (emit-ea segment src
(reg-tn-encoding dst
)))
1657 (maybe-emit-rex-for-ea segment src dst
:operand-size dst-size
)
1658 (emit-byte segment
#b00001111
)
1659 (emit-byte segment opcode
)
1660 (emit-ea segment src
(reg-tn-encoding dst
)))
1662 (maybe-emit-rex-for-ea segment src dst
:operand-size dst-size
)
1663 (emit-byte segment
#b00001111
)
1664 (emit-byte segment
(logior opcode
1))
1665 (emit-ea segment src
(reg-tn-encoding dst
)))
1667 (aver (eq dst-size
:qword
))
1668 ;; dst is in reg, src is in modrm
1669 (let ((ea-p (ea-p src
)))
1670 (maybe-emit-rex-prefix segment
(if signed-p
:qword
:dword
) dst
1671 (and ea-p
(ea-index src
))
1672 (cond (ea-p (ea-base src
))
1675 (emit-byte segment
#x63
) ;movsxd
1676 ;;(emit-byte segment opcode)
1677 (emit-ea segment src
(reg-tn-encoding dst
)))))))))
1679 (define-instruction movsx
(segment dst src
)
1680 (:printer ext-reg-reg
/mem-no-width
1681 ((op #b10111110
) (reg/mem nil
:type
'sized-byte-reg
/mem
)))
1682 (:printer rex-ext-reg-reg
/mem-no-width
1683 ((op #b10111110
) (reg/mem nil
:type
'sized-byte-reg
/mem
)))
1684 (:printer ext-reg-reg
/mem-no-width
1685 ((op #b10111111
) (reg/mem nil
:type
'sized-word-reg
/mem
)))
1686 (:printer rex-ext-reg-reg
/mem-no-width
1687 ((op #b10111111
) (reg/mem nil
:type
'sized-word-reg
/mem
)))
1688 (:emitter
(emit-move-with-extension segment dst src
:signed
)))
1690 (define-instruction movzx
(segment dst src
)
1691 (:printer ext-reg-reg
/mem-no-width
1692 ((op #b10110110
) (reg/mem nil
:type
'sized-byte-reg
/mem
)))
1693 (:printer rex-ext-reg-reg
/mem-no-width
1694 ((op #b10110110
) (reg/mem nil
:type
'sized-byte-reg
/mem
)))
1695 (:printer ext-reg-reg
/mem-no-width
1696 ((op #b10110111
) (reg/mem nil
:type
'sized-word-reg
/mem
)))
1697 (:printer rex-ext-reg-reg
/mem-no-width
1698 ((op #b10110111
) (reg/mem nil
:type
'sized-word-reg
/mem
)))
1699 (:emitter
(emit-move-with-extension segment dst src nil
)))
1701 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1702 ;;; sign-extends the dword source into the qword destination register.
1703 ;;; If the operand size is :dword the instruction zero-extends the dword
1704 ;;; source into the qword destination register, i.e. it does the same as
1705 ;;; a dword MOV into a register.
1706 (define-instruction movsxd
(segment dst src
)
1707 (:printer reg-reg
/mem
((op #b0110001
) (width 1)
1708 (reg/mem nil
:type
'sized-dword-reg
/mem
)))
1709 (:printer rex-reg-reg
/mem
((op #b0110001
) (width 1)
1710 (reg/mem nil
:type
'sized-dword-reg
/mem
)))
1711 (:emitter
(emit-move-with-extension segment dst src
:signed
)))
1713 ;;; this is not a real amd64 instruction, of course
1714 (define-instruction movzxd
(segment dst src
)
1715 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1716 (:emitter
(emit-move-with-extension segment dst src nil
)))
1718 (define-instruction push
(segment src
)
1720 (:printer reg-no-width-default-qword
((op #b01010
)))
1721 (:printer rex-reg-no-width-default-qword
((op #b01010
)))
1723 (:printer reg
/mem-default-qword
((op '(#b11111111
#b110
))))
1724 (:printer rex-reg
/mem-default-qword
((op '(#b11111111
#b110
))))
1726 (:printer byte
((op #b01101010
) (imm nil
:type
'signed-imm-byte
))
1728 (:printer byte
((op #b01101000
)
1729 (imm nil
:type
'signed-imm-data-default-qword
))
1731 ;; ### segment registers?
1734 (cond ((integerp src
)
1735 (cond ((<= -
128 src
127)
1736 (emit-byte segment
#b01101010
)
1737 (emit-byte segment src
))
1739 ;; A REX-prefix is not needed because the operand size
1740 ;; defaults to 64 bits. The size of the immediate is 32
1741 ;; bits and it is sign-extended.
1742 (emit-byte segment
#b01101000
)
1743 (emit-signed-dword segment src
))))
1745 (let ((size (operand-size src
)))
1746 (aver (or (eq size
:qword
) (eq size
:word
)))
1747 (maybe-emit-operand-size-prefix segment size
)
1748 (maybe-emit-rex-for-ea segment src nil
:operand-size
:do-not-set
)
1749 (cond ((register-p src
)
1750 (emit-byte-with-reg segment
#b01010
(reg-tn-encoding src
)))
1752 (emit-byte segment
#b11111111
)
1753 (emit-ea segment src
#b110 t
))))))))
1755 (define-instruction pop
(segment dst
)
1756 (:printer reg-no-width-default-qword
((op #b01011
)))
1757 (:printer rex-reg-no-width-default-qword
((op #b01011
)))
1758 (:printer reg
/mem-default-qword
((op '(#b10001111
#b000
))))
1759 (:printer rex-reg
/mem-default-qword
((op '(#b10001111
#b000
))))
1761 (let ((size (operand-size dst
)))
1762 (aver (or (eq size
:qword
) (eq size
:word
)))
1763 (maybe-emit-operand-size-prefix segment size
)
1764 (maybe-emit-rex-for-ea segment dst nil
:operand-size
:do-not-set
)
1765 (cond ((register-p dst
)
1766 (emit-byte-with-reg segment
#b01011
(reg-tn-encoding dst
)))
1768 (emit-byte segment
#b10001111
)
1769 (emit-ea segment dst
#b000
))))))
1771 (define-instruction xchg
(segment operand1 operand2
)
1772 ;; Register with accumulator.
1773 (:printer reg-no-width
((op #b10010
)) '(:name
:tab accum
", " reg
))
1774 ;; Register/Memory with Register.
1775 (:printer reg-reg
/mem
((op #b1000011
)))
1776 (:printer rex-reg-reg
/mem
((op #b1000011
)))
1778 (let ((size (matching-operand-size operand1 operand2
)))
1779 (maybe-emit-operand-size-prefix segment size
)
1780 (labels ((xchg-acc-with-something (acc something
)
1781 (if (and (not (eq size
:byte
)) (register-p something
))
1783 (maybe-emit-rex-for-ea segment acc something
)
1784 (emit-byte-with-reg segment
1786 (reg-tn-encoding something
)))
1787 (xchg-reg-with-something acc something
)))
1788 (xchg-reg-with-something (reg something
)
1789 (maybe-emit-rex-for-ea segment something reg
)
1790 (emit-byte segment
(if (eq size
:byte
) #b10000110
#b10000111
))
1791 (emit-ea segment something
(reg-tn-encoding reg
))))
1792 (cond ((accumulator-p operand1
)
1793 (xchg-acc-with-something operand1 operand2
))
1794 ((accumulator-p operand2
)
1795 (xchg-acc-with-something operand2 operand1
))
1796 ((register-p operand1
)
1797 (xchg-reg-with-something operand1 operand2
))
1798 ((register-p operand2
)
1799 (xchg-reg-with-something operand2 operand1
))
1801 (error "bogus args to XCHG: ~S ~S" operand1 operand2
)))))))
1803 (define-instruction lea
(segment dst src
)
1804 (:printer rex-reg-reg
/mem
((op #b1000110
)))
1805 (:printer reg-reg
/mem
((op #b1000110
) (width 1)))
1807 (aver (or (dword-reg-p dst
) (qword-reg-p dst
)))
1808 (maybe-emit-rex-for-ea segment src dst
1809 :operand-size
:qword
)
1810 (emit-byte segment
#b10001101
)
1811 (emit-ea segment src
(reg-tn-encoding dst
))))
1813 (define-instruction cmpxchg
(segment dst src
)
1814 ;; Register/Memory with Register.
1815 (:printer ext-reg-reg
/mem
((op #b1011000
)) '(:name
:tab reg
/mem
", " reg
))
1817 (aver (register-p src
))
1818 (let ((size (matching-operand-size src dst
)))
1819 (maybe-emit-operand-size-prefix segment size
)
1820 (maybe-emit-rex-for-ea segment dst src
)
1821 (emit-byte segment
#b00001111
)
1822 (emit-byte segment
(if (eq size
:byte
) #b10110000
#b10110001
))
1823 (emit-ea segment dst
(reg-tn-encoding src
)))))
1827 (define-instruction fs-segment-prefix
(segment)
1829 (emit-byte segment
#x64
)))
1831 ;;;; flag control instructions
1833 ;;; CLC -- Clear Carry Flag.
1834 (define-instruction clc
(segment)
1835 (:printer byte
((op #b11111000
)))
1837 (emit-byte segment
#b11111000
)))
1839 ;;; CLD -- Clear Direction Flag.
1840 (define-instruction cld
(segment)
1841 (:printer byte
((op #b11111100
)))
1843 (emit-byte segment
#b11111100
)))
1845 ;;; CLI -- Clear Iterrupt Enable Flag.
1846 (define-instruction cli
(segment)
1847 (:printer byte
((op #b11111010
)))
1849 (emit-byte segment
#b11111010
)))
1851 ;;; CMC -- Complement Carry Flag.
1852 (define-instruction cmc
(segment)
1853 (:printer byte
((op #b11110101
)))
1855 (emit-byte segment
#b11110101
)))
1857 ;;; LAHF -- Load AH into flags.
1858 (define-instruction lahf
(segment)
1859 (:printer byte
((op #b10011111
)))
1861 (emit-byte segment
#b10011111
)))
1863 ;;; POPF -- Pop flags.
1864 (define-instruction popf
(segment)
1865 (:printer byte
((op #b10011101
)))
1867 (emit-byte segment
#b10011101
)))
1869 ;;; PUSHF -- push flags.
1870 (define-instruction pushf
(segment)
1871 (:printer byte
((op #b10011100
)))
1873 (emit-byte segment
#b10011100
)))
1875 ;;; SAHF -- Store AH into flags.
1876 (define-instruction sahf
(segment)
1877 (:printer byte
((op #b10011110
)))
1879 (emit-byte segment
#b10011110
)))
1881 ;;; STC -- Set Carry Flag.
1882 (define-instruction stc
(segment)
1883 (:printer byte
((op #b11111001
)))
1885 (emit-byte segment
#b11111001
)))
1887 ;;; STD -- Set Direction Flag.
1888 (define-instruction std
(segment)
1889 (:printer byte
((op #b11111101
)))
1891 (emit-byte segment
#b11111101
)))
1893 ;;; STI -- Set Interrupt Enable Flag.
1894 (define-instruction sti
(segment)
1895 (:printer byte
((op #b11111011
)))
1897 (emit-byte segment
#b11111011
)))
1901 (defun emit-random-arith-inst (name segment dst src opcode
1902 &optional allow-constants
)
1903 (let ((size (matching-operand-size dst src
)))
1904 (maybe-emit-operand-size-prefix segment size
)
1907 (cond ((and (not (eq size
:byte
)) (<= -
128 src
127))
1908 (maybe-emit-rex-for-ea segment dst nil
)
1909 (emit-byte segment
#b10000011
)
1910 (emit-ea segment dst opcode allow-constants
)
1911 (emit-byte segment src
))
1912 ((accumulator-p dst
)
1913 (maybe-emit-rex-for-ea segment dst nil
)
1920 (emit-sized-immediate segment size src
))
1922 (maybe-emit-rex-for-ea segment dst nil
)
1923 (emit-byte segment
(if (eq size
:byte
) #b10000000
#b10000001
))
1924 (emit-ea segment dst opcode allow-constants
)
1925 (emit-sized-immediate segment size src
))))
1927 (maybe-emit-rex-for-ea segment dst src
)
1931 (if (eq size
:byte
) #b00000000
#b00000001
)))
1932 (emit-ea segment dst
(reg-tn-encoding src
) allow-constants
))
1934 (maybe-emit-rex-for-ea segment src dst
)
1938 (if (eq size
:byte
) #b00000010
#b00000011
)))
1939 (emit-ea segment src
(reg-tn-encoding dst
) allow-constants
))
1941 (error "bogus operands to ~A" name
)))))
1943 (eval-when (:compile-toplevel
:execute
)
1944 (defun arith-inst-printer-list (subop)
1945 `((accum-imm ((op ,(dpb subop
(byte 3 2) #b0000010
))))
1946 (rex-accum-imm ((op ,(dpb subop
(byte 3 2) #b0000010
))))
1947 (reg/mem-imm
((op (#b1000000
,subop
))))
1948 (rex-reg/mem-imm
((op (#b1000000
,subop
))))
1949 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1950 ;; therefore we force WIDTH to 1.
1951 (reg/mem-imm
((op (#b1000001
,subop
)) (width 1)
1952 (imm nil
:type signed-imm-byte
)))
1953 (rex-reg/mem-imm
((op (#b1000001
,subop
)) (width 1)
1954 (imm nil
:type signed-imm-byte
)))
1955 (reg-reg/mem-dir
((op ,(dpb subop
(byte 3 1) #b000000
))))
1956 (rex-reg-reg/mem-dir
((op ,(dpb subop
(byte 3 1) #b000000
))))))
1959 (define-instruction add
(segment dst src
)
1960 (:printer-list
(arith-inst-printer-list #b000
))
1961 (:emitter
(emit-random-arith-inst "ADD" segment dst src
#b000
)))
1963 (define-instruction adc
(segment dst src
)
1964 (:printer-list
(arith-inst-printer-list #b010
))
1965 (:emitter
(emit-random-arith-inst "ADC" segment dst src
#b010
)))
1967 (define-instruction sub
(segment dst src
)
1968 (:printer-list
(arith-inst-printer-list #b101
))
1969 (:emitter
(emit-random-arith-inst "SUB" segment dst src
#b101
)))
1971 (define-instruction sbb
(segment dst src
)
1972 (:printer-list
(arith-inst-printer-list #b011
))
1973 (:emitter
(emit-random-arith-inst "SBB" segment dst src
#b011
)))
1975 (define-instruction cmp
(segment dst src
)
1976 (:printer-list
(arith-inst-printer-list #b111
))
1977 (:emitter
(emit-random-arith-inst "CMP" segment dst src
#b111 t
)))
1979 ;;; The one-byte encodings for INC and DEC are used as REX prefixes
1980 ;;; in 64-bit mode so we always use the two-byte form.
1981 (define-instruction inc
(segment dst
)
1982 (:printer reg
/mem
((op '(#b1111111
#b000
))))
1983 (:printer rex-reg
/mem
((op '(#b1111111
#b000
))))
1985 (let ((size (operand-size dst
)))
1986 (maybe-emit-operand-size-prefix segment size
)
1987 (maybe-emit-rex-for-ea segment dst nil
)
1988 (emit-byte segment
(if (eq size
:byte
) #b11111110
#b11111111
))
1989 (emit-ea segment dst
#b000
))))
1991 (define-instruction dec
(segment dst
)
1992 (:printer reg
/mem
((op '(#b1111111
#b001
))))
1993 (:printer rex-reg
/mem
((op '(#b1111111
#b001
))))
1995 (let ((size (operand-size dst
)))
1996 (maybe-emit-operand-size-prefix segment size
)
1997 (maybe-emit-rex-for-ea segment dst nil
)
1998 (emit-byte segment
(if (eq size
:byte
) #b11111110
#b11111111
))
1999 (emit-ea segment dst
#b001
))))
2001 (define-instruction neg
(segment dst
)
2002 (:printer reg
/mem
((op '(#b1111011
#b011
))))
2003 (:printer rex-reg
/mem
((op '(#b1111011
#b011
))))
2005 (let ((size (operand-size dst
)))
2006 (maybe-emit-operand-size-prefix segment size
)
2007 (maybe-emit-rex-for-ea segment dst nil
)
2008 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2009 (emit-ea segment dst
#b011
))))
2011 (define-instruction mul
(segment dst src
)
2012 (:printer accum-reg
/mem
((op '(#b1111011
#b100
))))
2013 (:printer rex-accum-reg
/mem
((op '(#b1111011
#b100
))))
2015 (let ((size (matching-operand-size dst src
)))
2016 (aver (accumulator-p dst
))
2017 (maybe-emit-operand-size-prefix segment size
)
2018 (maybe-emit-rex-for-ea segment src nil
)
2019 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2020 (emit-ea segment src
#b100
))))
2022 (define-instruction imul
(segment dst
&optional src1 src2
)
2023 (:printer accum-reg
/mem
((op '(#b1111011
#b101
))))
2024 (:printer rex-accum-reg
/mem
((op '(#b1111011
#b101
))))
2025 (:printer ext-reg-reg
/mem-no-width
((op #b10101111
)))
2026 (:printer rex-ext-reg-reg
/mem-no-width
((op #b10101111
)))
2027 (:printer reg-reg
/mem
((op #b0110100
) (width 1)
2028 (imm nil
:type
'signed-imm-data
))
2029 '(:name
:tab reg
", " reg
/mem
", " imm
))
2030 (:printer rex-reg-reg
/mem
((op #b0110100
) (width 1)
2031 (imm nil
:type
'signed-imm-data
))
2032 '(:name
:tab reg
", " reg
/mem
", " imm
))
2033 (:printer reg-reg
/mem
((op #b0110101
) (width 1)
2034 (imm nil
:type
'signed-imm-byte
))
2035 '(:name
:tab reg
", " reg
/mem
", " imm
))
2036 (:printer rex-reg-reg
/mem
((op #b0110101
) (width 1)
2037 (imm nil
:type
'signed-imm-byte
))
2038 '(:name
:tab reg
", " reg
/mem
", " imm
))
2040 (flet ((r/m-with-immed-to-reg
(reg r
/m immed
)
2041 (let* ((size (matching-operand-size reg r
/m
))
2042 (sx (and (not (eq size
:byte
)) (<= -
128 immed
127))))
2043 (maybe-emit-operand-size-prefix segment size
)
2044 (maybe-emit-rex-for-ea segment r
/m reg
)
2045 (emit-byte segment
(if sx
#b01101011
#b01101001
))
2046 (emit-ea segment r
/m
(reg-tn-encoding reg
))
2048 (emit-byte segment immed
)
2049 (emit-sized-immediate segment size immed
)))))
2051 (r/m-with-immed-to-reg dst src1 src2
))
2054 (r/m-with-immed-to-reg dst dst src1
)
2055 (let ((size (matching-operand-size dst src1
)))
2056 (maybe-emit-operand-size-prefix segment size
)
2057 (maybe-emit-rex-for-ea segment src1 dst
)
2058 (emit-byte segment
#b00001111
)
2059 (emit-byte segment
#b10101111
)
2060 (emit-ea segment src1
(reg-tn-encoding dst
)))))
2062 (let ((size (operand-size dst
)))
2063 (maybe-emit-operand-size-prefix segment size
)
2064 (maybe-emit-rex-for-ea segment dst nil
)
2065 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2066 (emit-ea segment dst
#b101
)))))))
2068 (define-instruction div
(segment dst src
)
2069 (:printer accum-reg
/mem
((op '(#b1111011
#b110
))))
2070 (:printer rex-accum-reg
/mem
((op '(#b1111011
#b110
))))
2072 (let ((size (matching-operand-size dst src
)))
2073 (aver (accumulator-p dst
))
2074 (maybe-emit-operand-size-prefix segment size
)
2075 (maybe-emit-rex-for-ea segment src nil
)
2076 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2077 (emit-ea segment src
#b110
))))
2079 (define-instruction idiv
(segment dst src
)
2080 (:printer accum-reg
/mem
((op '(#b1111011
#b111
))))
2081 (:printer rex-accum-reg
/mem
((op '(#b1111011
#b111
))))
2083 (let ((size (matching-operand-size dst src
)))
2084 (aver (accumulator-p dst
))
2085 (maybe-emit-operand-size-prefix segment size
)
2086 (maybe-emit-rex-for-ea segment src nil
)
2087 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2088 (emit-ea segment src
#b111
))))
2090 (define-instruction bswap
(segment dst
)
2091 (:printer ext-reg-no-width
((op #b11001
)))
2093 (let ((size (operand-size dst
)))
2094 (maybe-emit-rex-prefix segment size nil nil dst
)
2095 (emit-byte segment
#x0f
)
2096 (emit-byte-with-reg segment
#b11001
(reg-tn-encoding dst
)))))
2098 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2099 (define-instruction cbw
(segment)
2100 (:printer x66-byte
((op #b10011000
)))
2102 (maybe-emit-operand-size-prefix segment
:word
)
2103 (emit-byte segment
#b10011000
)))
2105 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2106 (define-instruction cwde
(segment)
2107 (:printer byte
((op #b10011000
)))
2109 (maybe-emit-operand-size-prefix segment
:dword
)
2110 (emit-byte segment
#b10011000
)))
2112 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2113 (define-instruction cdqe
(segment)
2114 (:printer rex-byte
((op #b10011000
)))
2116 (maybe-emit-rex-prefix segment
:qword nil nil nil
)
2117 (emit-byte segment
#b10011000
)))
2119 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2120 (define-instruction cwd
(segment)
2121 (:printer x66-byte
((op #b10011001
)))
2123 (maybe-emit-operand-size-prefix segment
:word
)
2124 (emit-byte segment
#b10011001
)))
2126 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2127 (define-instruction cdq
(segment)
2128 (:printer byte
((op #b10011001
)))
2130 (maybe-emit-operand-size-prefix segment
:dword
)
2131 (emit-byte segment
#b10011001
)))
2133 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2134 (define-instruction cqo
(segment)
2135 (:printer rex-byte
((op #b10011001
)))
2137 (maybe-emit-rex-prefix segment
:qword nil nil nil
)
2138 (emit-byte segment
#b10011001
)))
2140 (define-instruction xadd
(segment dst src
)
2141 ;; Register/Memory with Register.
2142 (:printer ext-reg-reg
/mem
((op #b1100000
)) '(:name
:tab reg
/mem
", " reg
))
2144 (aver (register-p src
))
2145 (let ((size (matching-operand-size src dst
)))
2146 (maybe-emit-operand-size-prefix segment size
)
2147 (maybe-emit-rex-for-ea segment dst src
)
2148 (emit-byte segment
#b00001111
)
2149 (emit-byte segment
(if (eq size
:byte
) #b11000000
#b11000001
))
2150 (emit-ea segment dst
(reg-tn-encoding src
)))))
2155 (defun emit-shift-inst (segment dst amount opcode
)
2156 (let ((size (operand-size dst
)))
2157 (maybe-emit-operand-size-prefix segment size
)
2158 (multiple-value-bind (major-opcode immed
)
2160 (:cl
(values #b11010010 nil
))
2161 (1 (values #b11010000 nil
))
2162 (t (values #b11000000 t
)))
2163 (maybe-emit-rex-for-ea segment dst nil
)
2165 (if (eq size
:byte
) major-opcode
(logior major-opcode
1)))
2166 (emit-ea segment dst opcode
)
2168 (emit-byte segment amount
)))))
2170 (eval-when (:compile-toplevel
:execute
)
2171 (defun shift-inst-printer-list (subop)
2172 `((reg/mem
((op (#b1101000
,subop
)))
2173 (:name
:tab reg
/mem
", 1"))
2174 (rex-reg/mem
((op (#b1101000
,subop
)))
2175 (:name
:tab reg
/mem
", 1"))
2176 (reg/mem
((op (#b1101001
,subop
)))
2177 (:name
:tab reg
/mem
", " 'cl
))
2178 (rex-reg/mem
((op (#b1101001
,subop
)))
2179 (:name
:tab reg
/mem
", " 'cl
))
2180 (reg/mem-imm
((op (#b1100000
,subop
))
2181 (imm nil
:type imm-byte
)))
2182 (rex-reg/mem-imm
((op (#b1100000
,subop
))
2183 (imm nil
:type imm-byte
))))))
2185 (define-instruction rol
(segment dst amount
)
2187 (shift-inst-printer-list #b000
))
2189 (emit-shift-inst segment dst amount
#b000
)))
2191 (define-instruction ror
(segment dst amount
)
2193 (shift-inst-printer-list #b001
))
2195 (emit-shift-inst segment dst amount
#b001
)))
2197 (define-instruction rcl
(segment dst amount
)
2199 (shift-inst-printer-list #b010
))
2201 (emit-shift-inst segment dst amount
#b010
)))
2203 (define-instruction rcr
(segment dst amount
)
2205 (shift-inst-printer-list #b011
))
2207 (emit-shift-inst segment dst amount
#b011
)))
2209 (define-instruction shl
(segment dst amount
)
2211 (shift-inst-printer-list #b100
))
2213 (emit-shift-inst segment dst amount
#b100
)))
2215 (define-instruction shr
(segment dst amount
)
2217 (shift-inst-printer-list #b101
))
2219 (emit-shift-inst segment dst amount
#b101
)))
2221 (define-instruction sar
(segment dst amount
)
2223 (shift-inst-printer-list #b111
))
2225 (emit-shift-inst segment dst amount
#b111
)))
2227 (defun emit-double-shift (segment opcode dst src amt
)
2228 (let ((size (matching-operand-size dst src
)))
2229 (when (eq size
:byte
)
2230 (error "Double shifts can only be used with words."))
2231 (maybe-emit-operand-size-prefix segment size
)
2232 (maybe-emit-rex-for-ea segment dst src
)
2233 (emit-byte segment
#b00001111
)
2234 (emit-byte segment
(dpb opcode
(byte 1 3)
2235 (if (eq amt
:cl
) #b10100101
#b10100100
)))
2236 (emit-ea segment dst
(reg-tn-encoding src
))
2237 (unless (eq amt
:cl
)
2238 (emit-byte segment amt
))))
2240 (eval-when (:compile-toplevel
:execute
)
2241 (defun double-shift-inst-printer-list (op)
2243 (ext-reg-reg/mem-imm
((op ,(logior op
#b100
))
2244 (imm nil
:type signed-imm-byte
)))
2245 (ext-reg-reg/mem
((op ,(logior op
#b101
)))
2246 (:name
:tab reg
/mem
", " 'cl
)))))
2248 (define-instruction shld
(segment dst src amt
)
2249 (:declare
(type (or (member :cl
) (mod 32)) amt
))
2250 (:printer-list
(double-shift-inst-printer-list #b10100000
))
2252 (emit-double-shift segment
#b0 dst src amt
)))
2254 (define-instruction shrd
(segment dst src amt
)
2255 (:declare
(type (or (member :cl
) (mod 32)) amt
))
2256 (:printer-list
(double-shift-inst-printer-list #b10101000
))
2258 (emit-double-shift segment
#b1 dst src amt
)))
2260 (define-instruction and
(segment dst src
)
2262 (arith-inst-printer-list #b100
))
2264 (emit-random-arith-inst "AND" segment dst src
#b100
)))
2266 (define-instruction test
(segment this that
)
2267 (:printer accum-imm
((op #b1010100
)))
2268 (:printer rex-accum-imm
((op #b1010100
)))
2269 (:printer reg
/mem-imm
((op '(#b1111011
#b000
))))
2270 (:printer rex-reg
/mem-imm
((op '(#b1111011
#b000
))))
2271 (:printer reg-reg
/mem
((op #b1000010
)))
2272 (:printer rex-reg-reg
/mem
((op #b1000010
)))
2274 (let ((size (matching-operand-size this that
)))
2275 (maybe-emit-operand-size-prefix segment size
)
2276 (flet ((test-immed-and-something (immed something
)
2277 (cond ((accumulator-p something
)
2278 (maybe-emit-rex-for-ea segment something nil
)
2280 (if (eq size
:byte
) #b10101000
#b10101001
))
2281 (emit-sized-immediate segment size immed
))
2283 (maybe-emit-rex-for-ea segment something nil
)
2285 (if (eq size
:byte
) #b11110110
#b11110111
))
2286 (emit-ea segment something
#b000
)
2287 (emit-sized-immediate segment size immed
))))
2288 (test-reg-and-something (reg something
)
2289 (maybe-emit-rex-for-ea segment something reg
)
2290 (emit-byte segment
(if (eq size
:byte
) #b10000100
#b10000101
))
2291 (emit-ea segment something
(reg-tn-encoding reg
))))
2292 (cond ((integerp that
)
2293 (test-immed-and-something that this
))
2295 (test-immed-and-something this that
))
2297 (test-reg-and-something this that
))
2299 (test-reg-and-something that this
))
2301 (error "bogus operands for TEST: ~S and ~S" this that
)))))))
2303 (define-instruction or
(segment dst src
)
2305 (arith-inst-printer-list #b001
))
2307 (emit-random-arith-inst "OR" segment dst src
#b001
)))
2309 (define-instruction xor
(segment dst src
)
2311 (arith-inst-printer-list #b110
))
2313 (emit-random-arith-inst "XOR" segment dst src
#b110
)))
2315 (define-instruction not
(segment dst
)
2316 (:printer reg
/mem
((op '(#b1111011
#b010
))))
2317 (:printer rex-reg
/mem
((op '(#b1111011
#b010
))))
2319 (let ((size (operand-size dst
)))
2320 (maybe-emit-operand-size-prefix segment size
)
2321 (maybe-emit-rex-for-ea segment dst nil
)
2322 (emit-byte segment
(if (eq size
:byte
) #b11110110
#b11110111
))
2323 (emit-ea segment dst
#b010
))))
2325 ;;;; string manipulation
2327 (define-instruction cmps
(segment size
)
2328 (:printer string-op
((op #b1010011
)))
2329 (:printer rex-string-op
((op #b1010011
)))
2331 (maybe-emit-operand-size-prefix segment size
)
2332 (maybe-emit-rex-prefix segment size nil nil nil
)
2333 (emit-byte segment
(if (eq size
:byte
) #b10100110
#b10100111
))))
2335 (define-instruction ins
(segment acc
)
2336 (:printer string-op
((op #b0110110
)))
2337 (:printer rex-string-op
((op #b0110110
)))
2339 (let ((size (operand-size acc
)))
2340 (aver (accumulator-p acc
))
2341 (maybe-emit-operand-size-prefix segment size
)
2342 (maybe-emit-rex-prefix segment size nil nil nil
)
2343 (emit-byte segment
(if (eq size
:byte
) #b01101100
#b01101101
)))))
2345 (define-instruction lods
(segment acc
)
2346 (:printer string-op
((op #b1010110
)))
2347 (:printer rex-string-op
((op #b1010110
)))
2349 (let ((size (operand-size acc
)))
2350 (aver (accumulator-p acc
))
2351 (maybe-emit-operand-size-prefix segment size
)
2352 (maybe-emit-rex-prefix segment size nil nil nil
)
2353 (emit-byte segment
(if (eq size
:byte
) #b10101100
#b10101101
)))))
2355 (define-instruction movs
(segment size
)
2356 (:printer string-op
((op #b1010010
)))
2357 (:printer rex-string-op
((op #b1010010
)))
2359 (maybe-emit-operand-size-prefix segment size
)
2360 (maybe-emit-rex-prefix segment size nil nil nil
)
2361 (emit-byte segment
(if (eq size
:byte
) #b10100100
#b10100101
))))
2363 (define-instruction outs
(segment acc
)
2364 (:printer string-op
((op #b0110111
)))
2365 (:printer rex-string-op
((op #b0110111
)))
2367 (let ((size (operand-size acc
)))
2368 (aver (accumulator-p acc
))
2369 (maybe-emit-operand-size-prefix segment size
)
2370 (maybe-emit-rex-prefix segment size nil nil nil
)
2371 (emit-byte segment
(if (eq size
:byte
) #b01101110
#b01101111
)))))
2373 (define-instruction scas
(segment acc
)
2374 (:printer string-op
((op #b1010111
)))
2375 (:printer rex-string-op
((op #b1010111
)))
2377 (let ((size (operand-size acc
)))
2378 (aver (accumulator-p acc
))
2379 (maybe-emit-operand-size-prefix segment size
)
2380 (maybe-emit-rex-prefix segment size nil nil nil
)
2381 (emit-byte segment
(if (eq size
:byte
) #b10101110
#b10101111
)))))
2383 (define-instruction stos
(segment acc
)
2384 (:printer string-op
((op #b1010101
)))
2385 (:printer rex-string-op
((op #b1010101
)))
2387 (let ((size (operand-size acc
)))
2388 (aver (accumulator-p acc
))
2389 (maybe-emit-operand-size-prefix segment size
)
2390 (maybe-emit-rex-prefix segment size nil nil nil
)
2391 (emit-byte segment
(if (eq size
:byte
) #b10101010
#b10101011
)))))
2393 (define-instruction xlat
(segment)
2394 (:printer byte
((op #b11010111
)))
2396 (emit-byte segment
#b11010111
)))
2398 (define-instruction rep
(segment)
2400 (emit-byte segment
#b11110010
)))
2402 (define-instruction repe
(segment)
2403 (:printer byte
((op #b11110011
)))
2405 (emit-byte segment
#b11110011
)))
2407 (define-instruction repne
(segment)
2408 (:printer byte
((op #b11110010
)))
2410 (emit-byte segment
#b11110010
)))
2413 ;;;; bit manipulation
2415 (define-instruction bsf
(segment dst src
)
2416 (:printer ext-reg-reg
/mem-no-width
((op #b10111100
)))
2417 (:printer rex-ext-reg-reg
/mem-no-width
((op #b10111100
)))
2419 (let ((size (matching-operand-size dst src
)))
2420 (when (eq size
:byte
)
2421 (error "can't scan bytes: ~S" src
))
2422 (maybe-emit-operand-size-prefix segment size
)
2423 (maybe-emit-rex-for-ea segment src dst
)
2424 (emit-byte segment
#b00001111
)
2425 (emit-byte segment
#b10111100
)
2426 (emit-ea segment src
(reg-tn-encoding dst
)))))
2428 (define-instruction bsr
(segment dst src
)
2429 (:printer ext-reg-reg
/mem-no-width
((op #b10111101
)))
2430 (:printer rex-ext-reg-reg
/mem-no-width
((op #b10111101
)))
2432 (let ((size (matching-operand-size dst src
)))
2433 (when (eq size
:byte
)
2434 (error "can't scan bytes: ~S" src
))
2435 (maybe-emit-operand-size-prefix segment size
)
2436 (maybe-emit-rex-for-ea segment src dst
)
2437 (emit-byte segment
#b00001111
)
2438 (emit-byte segment
#b10111101
)
2439 (emit-ea segment src
(reg-tn-encoding dst
)))))
2441 (defun emit-bit-test-and-mumble (segment src index opcode
)
2442 (let ((size (operand-size src
)))
2443 (when (eq size
:byte
)
2444 (error "can't scan bytes: ~S" src
))
2445 (maybe-emit-operand-size-prefix segment size
)
2446 (cond ((integerp index
)
2447 (maybe-emit-rex-for-ea segment src nil
)
2448 (emit-byte segment
#b00001111
)
2449 (emit-byte segment
#b10111010
)
2450 (emit-ea segment src opcode
)
2451 (emit-byte segment index
))
2453 (maybe-emit-rex-for-ea segment src index
)
2454 (emit-byte segment
#b00001111
)
2455 (emit-byte segment
(dpb opcode
(byte 3 3) #b10000011
))
2456 (emit-ea segment src
(reg-tn-encoding index
))))))
2458 (eval-when (:compile-toplevel
:execute
)
2459 (defun bit-test-inst-printer-list (subop)
2460 `((ext-reg/mem-imm
((op (#b1011101
,subop
))
2461 (reg/mem nil
:type reg
/mem
)
2462 (imm nil
:type imm-byte
)
2464 (ext-reg-reg/mem
((op ,(dpb subop
(byte 3 2) #b1000001
))
2466 (:name
:tab reg
/mem
", " reg
)))))
2468 (define-instruction bt
(segment src index
)
2469 (:printer-list
(bit-test-inst-printer-list #b100
))
2471 (emit-bit-test-and-mumble segment src index
#b100
)))
2473 (define-instruction btc
(segment src index
)
2474 (:printer-list
(bit-test-inst-printer-list #b111
))
2476 (emit-bit-test-and-mumble segment src index
#b111
)))
2478 (define-instruction btr
(segment src index
)
2479 (:printer-list
(bit-test-inst-printer-list #b110
))
2481 (emit-bit-test-and-mumble segment src index
#b110
)))
2483 (define-instruction bts
(segment src index
)
2484 (:printer-list
(bit-test-inst-printer-list #b101
))
2486 (emit-bit-test-and-mumble segment src index
#b101
)))
2489 ;;;; control transfer
2491 (define-instruction call
(segment where
)
2492 (:printer near-jump
((op #b11101000
)))
2493 (:printer reg
/mem-default-qword
((op '(#b11111111
#b010
))))
2494 (:printer rex-reg
/mem-default-qword
((op '(#b11111111
#b010
))))
2498 (emit-byte segment
#b11101000
) ; 32 bit relative
2499 (emit-back-patch segment
2501 (lambda (segment posn
)
2502 (emit-signed-dword segment
2503 (- (label-position where
)
2506 (emit-byte segment
#b11101000
)
2507 (emit-relative-fixup segment where
))
2509 (maybe-emit-rex-for-ea segment where nil
:operand-size
:do-not-set
)
2510 (emit-byte segment
#b11111111
)
2511 (emit-ea segment where
#b010
)))))
2513 (defun emit-byte-displacement-backpatch (segment target
)
2514 (emit-back-patch segment
2516 (lambda (segment posn
)
2517 (let ((disp (- (label-position target
) (1+ posn
))))
2518 (aver (<= -
128 disp
127))
2519 (emit-byte segment disp
)))))
2521 (define-instruction jmp
(segment cond
&optional where
)
2522 ;; conditional jumps
2523 (:printer short-cond-jump
((op #b0111
)) '('j cc
:tab label
))
2524 (:printer near-cond-jump
() '('j cc
:tab label
))
2525 ;; unconditional jumps
2526 (:printer short-jump
((op #b1011
)))
2527 (:printer near-jump
((op #b11101001
)))
2528 (:printer reg
/mem-default-qword
((op '(#b11111111
#b100
))))
2529 (:printer rex-reg
/mem-default-qword
((op '(#b11111111
#b100
))))
2534 (lambda (segment posn delta-if-after
)
2535 (let ((disp (- (label-position where posn delta-if-after
)
2537 (when (<= -
128 disp
127)
2539 (dpb (conditional-opcode cond
)
2542 (emit-byte-displacement-backpatch segment where
)
2544 (lambda (segment posn
)
2545 (let ((disp (- (label-position where
) (+ posn
6))))
2546 (emit-byte segment
#b00001111
)
2548 (dpb (conditional-opcode cond
)
2551 (emit-signed-dword segment disp
)))))
2552 ((label-p (setq where cond
))
2555 (lambda (segment posn delta-if-after
)
2556 (let ((disp (- (label-position where posn delta-if-after
)
2558 (when (<= -
128 disp
127)
2559 (emit-byte segment
#b11101011
)
2560 (emit-byte-displacement-backpatch segment where
)
2562 (lambda (segment posn
)
2563 (let ((disp (- (label-position where
) (+ posn
5))))
2564 (emit-byte segment
#b11101001
)
2565 (emit-signed-dword segment disp
)))))
2567 (emit-byte segment
#b11101001
)
2568 (emit-relative-fixup segment where
))
2570 (unless (or (ea-p where
) (tn-p where
))
2571 (error "don't know what to do with ~A" where
))
2572 ;; near jump defaults to 64 bit
2573 ;; w-bit in rex prefix is unnecessary
2574 (maybe-emit-rex-for-ea segment where nil
:operand-size
:do-not-set
)
2575 (emit-byte segment
#b11111111
)
2576 (emit-ea segment where
#b100
)))))
2578 (define-instruction ret
(segment &optional stack-delta
)
2579 (:printer byte
((op #b11000011
)))
2580 (:printer byte
((op #b11000010
) (imm nil
:type
'imm-word-16
))
2584 (emit-byte segment
#b11000010
)
2585 (emit-word segment stack-delta
))
2587 (emit-byte segment
#b11000011
)))))
2589 (define-instruction jrcxz
(segment target
)
2590 (:printer short-jump
((op #b0011
)))
2592 (emit-byte segment
#b11100011
)
2593 (emit-byte-displacement-backpatch segment target
)))
2595 (define-instruction loop
(segment target
)
2596 (:printer short-jump
((op #b0010
)))
2598 (emit-byte segment
#b11100010
) ; pfw this was 11100011, or jecxz!!!!
2599 (emit-byte-displacement-backpatch segment target
)))
2601 (define-instruction loopz
(segment target
)
2602 (:printer short-jump
((op #b0001
)))
2604 (emit-byte segment
#b11100001
)
2605 (emit-byte-displacement-backpatch segment target
)))
2607 (define-instruction loopnz
(segment target
)
2608 (:printer short-jump
((op #b0000
)))
2610 (emit-byte segment
#b11100000
)
2611 (emit-byte-displacement-backpatch segment target
)))
2613 ;;;; conditional move
2614 (define-instruction cmov
(segment cond dst src
)
2615 (:printer cond-move
())
2616 (:printer rex-cond-move
())
2618 (aver (register-p dst
))
2619 (let ((size (matching-operand-size dst src
)))
2620 (aver (or (eq size
:word
) (eq size
:dword
) (eq size
:qword
)))
2621 (maybe-emit-operand-size-prefix segment size
))
2622 (maybe-emit-rex-for-ea segment src dst
)
2623 (emit-byte segment
#b00001111
)
2624 (emit-byte segment
(dpb (conditional-opcode cond
) (byte 4 0) #b01000000
))
2625 (emit-ea segment src
(reg-tn-encoding dst
))))
2627 ;;;; conditional byte set
2629 (define-instruction set
(segment dst cond
)
2630 (:printer cond-set
())
2632 (maybe-emit-rex-for-ea segment dst nil
)
2633 (emit-byte segment
#b00001111
)
2634 (emit-byte segment
(dpb (conditional-opcode cond
) (byte 4 0) #b10010000
))
2635 (emit-ea segment dst
#b000
)))
2639 (define-instruction enter
(segment disp
&optional
(level 0))
2640 (:declare
(type (unsigned-byte 16) disp
)
2641 (type (unsigned-byte 8) level
))
2642 (:printer enter-format
((op #b11001000
)))
2644 (emit-byte segment
#b11001000
)
2645 (emit-word segment disp
)
2646 (emit-byte segment level
)))
2648 (define-instruction leave
(segment)
2649 (:printer byte
((op #b11001001
)))
2651 (emit-byte segment
#b11001001
)))
2653 ;;;; interrupt instructions
2655 (defun snarf-error-junk (sap offset
&optional length-only
)
2656 (let* ((length (sb!sys
:sap-ref-8 sap offset
))
2657 (vector (make-array length
:element-type
'(unsigned-byte 8))))
2658 (declare (type sb
!sys
:system-area-pointer sap
)
2659 (type (unsigned-byte 8) length
)
2660 (type (simple-array (unsigned-byte 8) (*)) vector
))
2662 (values 0 (1+ length
) nil nil
))
2664 (sb!kernel
:copy-ub8-from-system-area sap
(1+ offset
)
2666 (collect ((sc-offsets)
2668 (lengths 1) ; the length byte
2670 (error-number (sb!c
:read-var-integer vector index
)))
2673 (when (>= index length
)
2675 (let ((old-index index
))
2676 (sc-offsets (sb!c
:read-var-integer vector index
))
2677 (lengths (- index old-index
))))
2678 (values error-number
2684 (defmacro break-cases
(breaknum &body cases
)
2685 (let ((bn-temp (gensym)))
2686 (collect ((clauses))
2687 (dolist (case cases
)
2688 (clauses `((= ,bn-temp
,(car case
)) ,@(cdr case
))))
2689 `(let ((,bn-temp
,breaknum
))
2690 (cond ,@(clauses))))))
2693 (defun break-control (chunk inst stream dstate
)
2694 (declare (ignore inst
))
2695 (flet ((nt (x) (if stream
(sb!disassem
:note x dstate
))))
2696 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2697 ;; map has it undefined; and it should be easier to look in the target
2698 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2699 ;; from first principles whether it's defined in some way that genesis
2701 (case #!-darwin
(byte-imm-code chunk dstate
)
2702 #!+darwin
(word-imm-code chunk dstate
)
2705 (sb!disassem
:handle-break-args
#'snarf-error-junk stream dstate
))
2708 (sb!disassem
:handle-break-args
#'snarf-error-junk stream dstate
))
2710 (nt "breakpoint trap"))
2711 (#.pending-interrupt-trap
2712 (nt "pending interrupt trap"))
2715 (#.fun-end-breakpoint-trap
2716 (nt "function end breakpoint trap"))
2717 (#.single-step-around-trap
2718 (nt "single-step trap (around)"))
2719 (#.single-step-before-trap
2720 (nt "single-step trap (before)")))))
2722 (define-instruction break
(segment code
)
2723 (:declare
(type (unsigned-byte 8) code
))
2724 #!-darwin
(:printer byte-imm
((op #b11001100
)) '(:name
:tab code
)
2725 :control
#'break-control
)
2726 #!+darwin
(:printer word-imm
((op #b0000101100001111
)) '(:name
:tab code
)
2727 :control
#'break-control
)
2729 #!-darwin
(emit-byte segment
#b11001100
)
2730 ;; On darwin, trap handling via SIGTRAP is unreliable, therefore we
2731 ;; throw a sigill with 0x0b0f instead and check for this in the
2732 ;; SIGILL handler and pass it on to the sigtrap handler if
2734 #!+darwin
(emit-word segment
#b0000101100001111
)
2735 (emit-byte segment code
)))
2737 (define-instruction int
(segment number
)
2738 (:declare
(type (unsigned-byte 8) number
))
2739 (:printer byte-imm
((op #b11001101
)))
2743 (emit-byte segment
#b11001100
))
2745 (emit-byte segment
#b11001101
)
2746 (emit-byte segment number
)))))
2748 (define-instruction iret
(segment)
2749 (:printer byte
((op #b11001111
)))
2751 (emit-byte segment
#b11001111
)))
2753 ;;;; processor control
2755 (define-instruction hlt
(segment)
2756 (:printer byte
((op #b11110100
)))
2758 (emit-byte segment
#b11110100
)))
2760 (define-instruction nop
(segment)
2761 (:printer byte
((op #b10010000
)))
2763 (emit-byte segment
#b10010000
)))
2765 (define-instruction wait
(segment)
2766 (:printer byte
((op #b10011011
)))
2768 (emit-byte segment
#b10011011
)))
2770 (define-instruction lock
(segment)
2771 (:printer byte
((op #b11110000
)))
2773 (emit-byte segment
#b11110000
)))
2775 ;;;; miscellaneous hackery
2777 (define-instruction byte
(segment byte
)
2779 (emit-byte segment byte
)))
2781 (define-instruction word
(segment word
)
2783 (emit-word segment word
)))
2785 (define-instruction dword
(segment dword
)
2787 (emit-dword segment dword
)))
2789 (defun emit-header-data (segment type
)
2790 (emit-back-patch segment
2792 (lambda (segment posn
)
2796 (component-header-length))
2800 (define-instruction simple-fun-header-word
(segment)
2802 (emit-header-data segment simple-fun-header-widetag
)))
2804 (define-instruction lra-header-word
(segment)
2806 (emit-header-data segment return-pc-header-widetag
)))
2808 ;;;; Instructions required to do floating point operations using SSE
2810 (defun emit-sse-inst (segment dst src prefix opcode
&key operand-size
)
2812 (emit-byte segment prefix
))
2814 (maybe-emit-rex-for-ea segment src dst
:operand-size operand-size
)
2815 (maybe-emit-rex-for-ea segment src dst
))
2816 (emit-byte segment
#x0f
)
2817 (emit-byte segment opcode
)
2818 (emit-ea segment src
(reg-tn-encoding dst
)))
2820 ;;; Emit an SSE instruction that has an XMM register as the destination
2821 ;;; operand and for which the size of the operands is implicitly given
2822 ;;; by the instruction.
2823 (defun emit-regular-sse-inst (segment dst src prefix opcode
)
2824 (aver (xmm-register-p dst
))
2825 (emit-sse-inst segment dst src prefix opcode
2826 :operand-size
:do-not-set
))
2828 ;;; Instructions having an XMM register as the destination operand
2829 ;;; and an XMM register or a memory location as the source operand.
2830 ;;; The operand size is implicitly given by the instruction.
2832 (macrolet ((define-regular-sse-inst (name prefix opcode
)
2833 `(define-instruction ,name
(segment dst src
)
2835 `((:printer ext-xmm-xmm
/mem
2836 ((prefix ,prefix
) (op ,opcode
)))
2837 (:printer ext-rex-xmm-xmm
/mem
2838 ((prefix ,prefix
) (op ,opcode
))))
2839 `((:printer xmm-xmm
/mem
((op ,opcode
)))
2840 (:printer rex-xmm-xmm
/mem
((op ,opcode
)))))
2842 (emit-regular-sse-inst segment dst src
,prefix
,opcode
)))))
2844 (define-regular-sse-inst andpd
#x66
#x54
)
2845 (define-regular-sse-inst andps nil
#x54
)
2846 (define-regular-sse-inst xorpd
#x66
#x57
)
2847 (define-regular-sse-inst xorps nil
#x57
)
2849 (define-regular-sse-inst comisd
#x66
#x2f
)
2850 (define-regular-sse-inst comiss nil
#x2f
)
2852 (define-regular-sse-inst addsd
#xf2
#x58
)
2853 (define-regular-sse-inst addss
#xf3
#x58
)
2854 (define-regular-sse-inst divsd
#xf2
#x5e
)
2855 (define-regular-sse-inst divss
#xf3
#x5e
)
2856 (define-regular-sse-inst mulsd
#xf2
#x59
)
2857 (define-regular-sse-inst mulss
#xf3
#x59
)
2858 (define-regular-sse-inst subsd
#xf2
#x5c
)
2859 (define-regular-sse-inst subss
#xf3
#x5c
)
2860 (define-regular-sse-inst sqrtsd
#xf2
#x51
)
2861 (define-regular-sse-inst sqrtss
#xf3
#x51
)
2863 (define-regular-sse-inst cvtsd2ss
#xf2
#x5a
)
2864 (define-regular-sse-inst cvtss2sd
#xf3
#x5a
)
2865 (define-regular-sse-inst cvtdq2pd
#xf3
#xe6
)
2866 (define-regular-sse-inst cvtdq2ps nil
#x5b
))
2869 (macrolet ((define-movsd/ss-sse-inst
(name prefix
)
2870 `(define-instruction ,name
(segment dst src
)
2871 (:printer ext-xmm-xmm
/mem-dir
((prefix ,prefix
)
2873 (:printer ext-rex-xmm-xmm
/mem-dir
((prefix ,prefix
)
2876 (cond ((xmm-register-p dst
)
2877 (emit-sse-inst segment dst src
,prefix
#x10
2878 :operand-size
:do-not-set
))
2880 (aver (xmm-register-p src
))
2881 (emit-sse-inst segment src dst
,prefix
#x11
2882 :operand-size
:do-not-set
)))))))
2883 (define-movsd/ss-sse-inst movsd
#xf2
)
2884 (define-movsd/ss-sse-inst movss
#xf3
))
2887 (define-instruction movq
(segment dst src
)
2888 (:printer ext-xmm-xmm
/mem
((prefix #xf3
) (op #x7e
)))
2889 (:printer ext-rex-xmm-xmm
/mem
((prefix #xf3
) (op #x7e
)))
2890 (:printer ext-xmm-xmm
/mem
((prefix #x66
) (op #xd6
))
2891 '(:name
:tab reg
/mem
", " reg
))
2892 (:printer ext-rex-xmm-xmm
/mem
((prefix #x66
) (op #xd6
))
2893 '(:name
:tab reg
/mem
", " reg
))
2895 (cond ((xmm-register-p dst
)
2896 (emit-sse-inst segment dst src
#xf3
#x7e
2897 :operand-size
:do-not-set
))
2899 (aver (xmm-register-p src
))
2900 (emit-sse-inst segment src dst
#x66
#xd6
2901 :operand-size
:do-not-set
)))))
2903 ;;; Instructions having an XMM register as the destination operand
2904 ;;; and a general-purpose register or a memory location as the source
2905 ;;; operand. The operand size is calculated from the source operand.
2907 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
2908 ;;; a memory location to the low order 32 or 64 bits of an XMM register
2909 ;;; with zero extension or vice versa.
2910 ;;; We do not support the MMX version of this instruction.
2911 (define-instruction movd
(segment dst src
)
2912 (:printer ext-xmm-reg
/mem
((prefix #x66
) (op #x6e
)))
2913 (:printer ext-rex-xmm-reg
/mem
((prefix #x66
) (op #x6e
)))
2914 (:printer ext-xmm-reg
/mem
((prefix #x66
) (op #x7e
))
2915 '(:name
:tab reg
/mem
", " reg
))
2916 (:printer ext-rex-xmm-reg
/mem
((prefix #x66
) (op #x7e
))
2917 '(:name
:tab reg
/mem
", " reg
))
2919 (cond ((xmm-register-p dst
)
2920 (emit-sse-inst segment dst src
#x66
#x6e
))
2922 (aver (xmm-register-p src
))
2923 (emit-sse-inst segment src dst
#x66
#x7e
)))))
2925 (macrolet ((define-integer-source-sse-inst (name prefix opcode
)
2926 `(define-instruction ,name
(segment dst src
)
2927 (:printer ext-xmm-reg
/mem
((prefix ,prefix
) (op ,opcode
)))
2928 (:printer ext-rex-xmm-reg
/mem
((prefix ,prefix
) (op ,opcode
)))
2930 (aver (xmm-register-p dst
))
2931 (let ((src-size (operand-size src
)))
2932 (aver (or (eq src-size
:qword
) (eq src-size
:dword
))))
2933 (emit-sse-inst segment dst src
,prefix
,opcode
)))))
2934 (define-integer-source-sse-inst cvtsi2sd
#xf2
#x2a
)
2935 (define-integer-source-sse-inst cvtsi2ss
#xf3
#x2a
))
2937 ;;; Instructions having a general-purpose register as the destination
2938 ;;; operand and an XMM register or a memory location as the source
2939 ;;; operand. The operand size is calculated from the destination
2942 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode
)
2943 `(define-instruction ,name
(segment dst src
)
2944 (:printer ext-reg-xmm
/mem
((prefix ,prefix
) (op ,opcode
)))
2945 (:printer ext-rex-reg-xmm
/mem
((prefix ,prefix
) (op ,opcode
)))
2947 (aver (register-p dst
))
2948 (let ((dst-size (operand-size dst
)))
2949 (aver (or (eq dst-size
:qword
) (eq dst-size
:dword
)))
2950 (emit-sse-inst segment dst src
,prefix
,opcode
2951 :operand-size dst-size
))))))
2952 (define-gpr-destination-sse-inst cvtsd2si
#xf2
#x2d
)
2953 (define-gpr-destination-sse-inst cvtss2si
#xf3
#x2d
)
2954 (define-gpr-destination-sse-inst cvttsd2si
#xf2
#x2c
)
2955 (define-gpr-destination-sse-inst cvttss2si
#xf3
#x2c
))
2957 ;;; Other SSE instructions
2959 (define-instruction ldmxcsr
(segment src
)
2961 (emit-byte segment
#x0f
)
2962 (emit-byte segment
#xae
)
2963 (emit-ea segment src
2)))
2965 (define-instruction stmxcsr
(segment dst
)
2967 (emit-byte segment
#x0f
)
2968 (emit-byte segment
#xae
)
2969 (emit-ea segment dst
3)))