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 ;;; A register field that can be extended by REX.R.
261 (defun prefilter-reg-r (value dstate)
262 (declare (type reg value)
263 (type sb!disassem:disassem-state dstate))
264 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-r)
268 ;;; A register field that can be extended by REX.B.
269 (defun prefilter-reg-b (value dstate)
270 (declare (type reg value)
271 (type sb!disassem:disassem-state dstate))
272 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-b)
276 ;;; Returns either an integer, meaning a register, or a list of
277 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
278 ;;; may be missing or nil to indicate that it's not used or has the
279 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
280 ;;; of the mod and r/m field of the ModRM byte of the instruction.
281 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
282 ;;; REX.B bit from DSTATE is used to extend the sole register or the
283 ;;; BASE-REG to a full register, the REX.X bit does the same for the
285 (defun prefilter-reg/mem (value dstate)
286 (declare (type list value)
287 (type sb!disassem:disassem-state dstate))
288 (let ((mod (first value))
289 (r/m (second value)))
290 (declare (type (unsigned-byte 2) mod)
291 (type (unsigned-byte 3) r/m))
292 (let ((full-reg (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
295 (declare (type full-reg full-reg))
301 (let ((sib (sb!disassem:read-suffix 8 dstate)))
302 (declare (type (unsigned-byte 8) sib))
303 (let ((base-reg (ldb (byte 3 0) sib))
304 (index-reg (ldb (byte 3 3) sib))
305 (index-scale (ldb (byte 2 6) sib)))
306 (declare (type (unsigned-byte 3) base-reg index-reg)
307 (type (unsigned-byte 2) index-scale))
311 (if (= base-reg #b101)
312 (sb!disassem:read-signed-suffix 32 dstate)
315 (sb!disassem:read-signed-suffix 8 dstate))
317 (sb!disassem:read-signed-suffix 32 dstate)))))
318 (list (unless (and (= mod #b00) (= base-reg #b101))
319 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
323 (unless (= index-reg #b100)
324 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-x)
327 (ash 1 index-scale))))))
328 ((and (= mod #b00) (= r/m #b101))
329 (list 'rip (sb!disassem:read-signed-suffix 32 dstate)) )
333 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
335 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
337 (defun read-address (value dstate)
338 (declare (ignore value)) ; always nil anyway
339 (sb!disassem:read-suffix (width-bits (inst-operand-size dstate)) dstate))
341 (defun width-bits (width)
350 ;;;; disassembler argument types
352 ;;; Used to capture the lower four bits of the REX prefix.
353 (sb!disassem:define-arg-type wrxb
354 :prefilter #'prefilter-wrxb)
356 (sb!disassem:define-arg-type width
357 :prefilter #'prefilter-width
358 :printer (lambda (value stream dstate)
359 (declare (ignore value))
360 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
363 (sb!disassem:define-arg-type displacement
365 :use-label #'offset-next
366 :printer (lambda (value stream dstate)
367 (sb!disassem:maybe-note-assembler-routine value nil dstate)
368 (print-label value stream dstate)))
370 (sb!disassem:define-arg-type accum
371 :printer (lambda (value stream dstate)
372 (declare (ignore value)
374 (type sb!disassem:disassem-state dstate))
375 (print-reg 0 stream dstate)))
377 (sb!disassem:define-arg-type reg
378 :prefilter #'prefilter-reg-r
379 :printer #'print-reg)
381 (sb!disassem:define-arg-type reg-b
382 :prefilter #'prefilter-reg-b
383 :printer #'print-reg)
385 (sb!disassem:define-arg-type reg-b-default-qword
386 :prefilter #'prefilter-reg-b
387 :printer #'print-reg-default-qword)
389 (sb!disassem:define-arg-type imm-addr
390 :prefilter #'read-address
391 :printer #'print-label)
393 ;;; Normally, immediate values for an operand size of :qword are of size
394 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
395 ;;; argument type definition following this one.
396 (sb!disassem:define-arg-type signed-imm-data
397 :prefilter (lambda (value dstate)
398 (declare (ignore value)) ; always nil anyway
399 (let ((width (width-bits (inst-operand-size dstate))))
402 (sb!disassem:read-signed-suffix width dstate))))
404 ;;; Used by the variant of the MOV instruction with opcode B8 which can
405 ;;; move immediates of all sizes (i.e. including :qword) into a
407 (sb!disassem:define-arg-type signed-imm-data-upto-qword
408 :prefilter (lambda (value dstate)
409 (declare (ignore value)) ; always nil anyway
410 (sb!disassem:read-signed-suffix
411 (width-bits (inst-operand-size dstate))
414 ;;; Used by those instructions that have a default operand size of
415 ;;; :qword. Nevertheless the immediate is at most of size :dword.
416 ;;; The only instruction of this kind having a variant with an immediate
417 ;;; argument is PUSH.
418 (sb!disassem:define-arg-type signed-imm-data-default-qword
419 :prefilter (lambda (value dstate)
420 (declare (ignore value)) ; always nil anyway
421 (let ((width (width-bits
422 (inst-operand-size-default-qword dstate))))
425 (sb!disassem:read-signed-suffix width dstate))))
427 (sb!disassem:define-arg-type signed-imm-byte
428 :prefilter (lambda (value dstate)
429 (declare (ignore value)) ; always nil anyway
430 (sb!disassem:read-signed-suffix 8 dstate)))
432 (sb!disassem:define-arg-type imm-byte
433 :prefilter (lambda (value dstate)
434 (declare (ignore value)) ; always nil anyway
435 (sb!disassem:read-suffix 8 dstate)))
437 ;;; needed for the ret imm16 instruction
438 (sb!disassem:define-arg-type imm-word-16
439 :prefilter (lambda (value dstate)
440 (declare (ignore value)) ; always nil anyway
441 (sb!disassem:read-suffix 16 dstate)))
443 (sb!disassem:define-arg-type reg/mem
444 :prefilter #'prefilter-reg/mem
445 :printer #'print-reg/mem)
446 (sb!disassem:define-arg-type sized-reg/mem
447 ;; Same as reg/mem, but prints an explicit size indicator for
448 ;; memory references.
449 :prefilter #'prefilter-reg/mem
450 :printer #'print-sized-reg/mem)
452 ;;; Arguments of type reg/mem with a fixed size.
453 (sb!disassem:define-arg-type sized-byte-reg/mem
454 :prefilter #'prefilter-reg/mem
455 :printer #'print-sized-byte-reg/mem)
456 (sb!disassem:define-arg-type sized-word-reg/mem
457 :prefilter #'prefilter-reg/mem
458 :printer #'print-sized-word-reg/mem)
459 (sb!disassem:define-arg-type sized-dword-reg/mem
460 :prefilter #'prefilter-reg/mem
461 :printer #'print-sized-dword-reg/mem)
463 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
464 (sb!disassem:define-arg-type sized-reg/mem-default-qword
465 :prefilter #'prefilter-reg/mem
466 :printer #'print-sized-reg/mem-default-qword)
469 (sb!disassem:define-arg-type xmmreg
470 :prefilter #'prefilter-reg-r
471 :printer #'print-xmmreg)
473 (sb!disassem:define-arg-type xmmreg/mem
474 :prefilter #'prefilter-reg/mem
475 :printer #'print-xmmreg/mem)
477 (sb!disassem:define-arg-type sized-xmmreg/mem
478 :prefilter #'prefilter-reg/mem
479 :printer #'print-sized-xmmreg/mem)
483 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
484 (defun print-fp-reg (value stream dstate)
485 (declare (ignore dstate))
486 (format stream "FR~D" value))
487 (defun prefilter-fp-reg (value dstate)
489 (declare (ignore dstate))
492 (sb!disassem:define-arg-type fp-reg
493 :prefilter #'prefilter-fp-reg
494 :printer #'print-fp-reg)
496 (eval-when (:compile-toplevel :load-toplevel :execute)
497 (defparameter *conditions*
500 (:b . 2) (:nae . 2) (:c . 2)
501 (:nb . 3) (:ae . 3) (:nc . 3)
502 (:eq . 4) (:e . 4) (:z . 4)
509 (:np . 11) (:po . 11)
510 (:l . 12) (:nge . 12)
511 (:nl . 13) (:ge . 13)
512 (:le . 14) (:ng . 14)
513 (:nle . 15) (:g . 15)))
514 (defparameter *condition-name-vec*
515 (let ((vec (make-array 16 :initial-element nil)))
516 (dolist (cond *conditions*)
517 (when (null (aref vec (cdr cond)))
518 (setf (aref vec (cdr cond)) (car cond))))
522 ;;; Set assembler parameters. (In CMU CL, this was done with
523 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
524 (eval-when (:compile-toplevel :load-toplevel :execute)
525 (setf sb!assem:*assem-scheduler-p* nil))
527 (sb!disassem:define-arg-type condition-code
528 :printer *condition-name-vec*)
530 (defun conditional-opcode (condition)
531 (cdr (assoc condition *conditions* :test #'eq)))
533 ;;;; disassembler instruction formats
535 (eval-when (:compile-toplevel :execute)
536 (defun swap-if (direction field1 separator field2)
537 `(:if (,direction :constant 0)
538 (,field1 ,separator ,field2)
539 (,field2 ,separator ,field1))))
541 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
542 (op :field (byte 8 0))
547 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
548 ;;; operand size of :word.
549 (sb!disassem:define-instruction-format (x66-byte 16
550 :default-printer '(:name))
551 (x66 :field (byte 8 0) :value #x66)
552 (op :field (byte 8 8)))
554 ;;; A one-byte instruction with a REX prefix, used to indicate an
555 ;;; operand size of :qword. REX.W must be 1, the other three bits are
557 (sb!disassem:define-instruction-format (rex-byte 16
558 :default-printer '(:name))
559 (rex :field (byte 5 3) :value #b01001)
560 (op :field (byte 8 8)))
562 (sb!disassem:define-instruction-format (simple 8)
563 (op :field (byte 7 1))
564 (width :field (byte 1 0) :type 'width)
569 (sb!disassem:define-instruction-format (rex-simple 16)
570 (rex :field (byte 4 4) :value #b0100)
571 (wrxb :field (byte 4 0) :type 'wrxb)
572 (op :field (byte 7 9))
573 (width :field (byte 1 8) :type 'width)
578 ;;; Same as simple, but with direction bit
579 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
580 (op :field (byte 6 2))
581 (dir :field (byte 1 1)))
583 ;;; Same as simple, but with the immediate value occurring by default,
584 ;;; and with an appropiate printer.
585 (sb!disassem:define-instruction-format (accum-imm 8
587 :default-printer '(:name
588 :tab accum ", " imm))
589 (imm :type 'signed-imm-data))
591 (sb!disassem:define-instruction-format (rex-accum-imm 16
593 :default-printer '(:name
594 :tab accum ", " imm))
595 (imm :type 'signed-imm-data))
597 (sb!disassem:define-instruction-format (reg-no-width 8
598 :default-printer '(:name :tab reg))
599 (op :field (byte 5 3))
600 (reg :field (byte 3 0) :type 'reg-b)
605 (sb!disassem:define-instruction-format (rex-reg-no-width 16
606 :default-printer '(:name :tab reg))
607 (rex :field (byte 4 4) :value #b0100)
608 (wrxb :field (byte 4 0) :type 'wrxb)
609 (op :field (byte 5 11))
610 (reg :field (byte 3 8) :type 'reg-b)
615 ;;; Same as reg-no-width, but with a default operand size of :qword.
616 (sb!disassem:define-instruction-format (reg-no-width-default-qword 8
617 :include 'reg-no-width
618 :default-printer '(:name :tab reg))
619 (reg :type 'reg-b-default-qword))
621 ;;; Same as rex-reg-no-width, but with a default operand size of :qword.
622 (sb!disassem:define-instruction-format (rex-reg-no-width-default-qword 16
623 :include 'rex-reg-no-width
624 :default-printer '(:name :tab reg))
625 (reg :type 'reg-b-default-qword))
627 (sb!disassem:define-instruction-format (modrm-reg-no-width 24
628 :default-printer '(:name :tab reg))
629 (rex :field (byte 4 4) :value #b0100)
630 (wrxb :field (byte 4 0) :type 'wrxb)
631 (ff :field (byte 8 8) :value #b11111111)
632 (mod :field (byte 2 22))
633 (modrm-reg :field (byte 3 19))
634 (reg :field (byte 3 16) :type 'reg-b)
639 ;;; Adds a width field to reg-no-width. Note that we can't use
640 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
641 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
642 ;;; the one for IMM to be able to determine the correct size of IMM.
643 (sb!disassem:define-instruction-format (reg 8
644 :default-printer '(:name :tab reg))
645 (op :field (byte 4 4))
646 (width :field (byte 1 3) :type 'width)
647 (reg :field (byte 3 0) :type 'reg-b)
652 (sb!disassem:define-instruction-format (rex-reg 16
653 :default-printer '(:name :tab reg))
654 (rex :field (byte 4 4) :value #b0100)
655 (wrxb :field (byte 4 0) :type 'wrxb)
656 (width :field (byte 1 11) :type 'width)
657 (op :field (byte 4 12))
658 (reg :field (byte 3 8) :type 'reg-b)
663 (sb!disassem:define-instruction-format (two-bytes 16
664 :default-printer '(:name))
665 (op :fields (list (byte 8 0) (byte 8 8))))
667 (sb!disassem:define-instruction-format (reg-reg/mem 16
669 `(:name :tab reg ", " reg/mem))
670 (op :field (byte 7 1))
671 (width :field (byte 1 0) :type 'width)
672 (reg/mem :fields (list (byte 2 14) (byte 3 8))
674 (reg :field (byte 3 11) :type 'reg)
678 (sb!disassem:define-instruction-format (rex-reg-reg/mem 24
680 `(:name :tab reg ", " reg/mem))
681 (rex :field (byte 4 4) :value #b0100)
682 (wrxb :field (byte 4 0) :type 'wrxb)
683 (width :field (byte 1 8) :type 'width)
684 (op :field (byte 7 9))
685 (reg/mem :fields (list (byte 2 22) (byte 3 16))
687 (reg :field (byte 3 19) :type 'reg)
691 ;;; same as reg-reg/mem, but with direction bit
692 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
693 :include 'reg-reg/mem
697 ,(swap-if 'dir 'reg/mem ", " 'reg)))
698 (op :field (byte 6 2))
699 (dir :field (byte 1 1)))
701 (sb!disassem:define-instruction-format (rex-reg-reg/mem-dir 24
702 :include 'rex-reg-reg/mem
706 ,(swap-if 'dir 'reg/mem ", " 'reg)))
707 (op :field (byte 6 10))
708 (dir :field (byte 1 9)))
710 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
711 (sb!disassem:define-instruction-format (reg/mem 16
712 :default-printer '(:name :tab reg/mem))
713 (op :fields (list (byte 7 1) (byte 3 11)))
714 (width :field (byte 1 0) :type 'width)
715 (reg/mem :fields (list (byte 2 14) (byte 3 8))
716 :type 'sized-reg/mem)
720 (sb!disassem:define-instruction-format (rex-reg/mem 24
721 :default-printer '(:name :tab reg/mem))
722 (rex :field (byte 4 4) :value #b0100)
723 (wrxb :field (byte 4 0) :type 'wrxb)
724 (op :fields (list (byte 7 9) (byte 3 19)))
725 (width :field (byte 1 8) :type 'width)
726 (reg/mem :fields (list (byte 2 22) (byte 3 16))
727 :type 'sized-reg/mem)
731 ;;; Same as reg/mem, but without a width field and with a default
732 ;;; operand size of :qword.
733 (sb!disassem:define-instruction-format (reg/mem-default-qword 16
734 :default-printer '(:name :tab reg/mem))
735 (op :fields (list (byte 8 0) (byte 3 11)))
736 (reg/mem :fields (list (byte 2 14) (byte 3 8))
737 :type 'sized-reg/mem-default-qword))
739 (sb!disassem:define-instruction-format (rex-reg/mem-default-qword 24
740 :default-printer '(:name :tab reg/mem))
741 (rex :field (byte 4 4) :value #b0100)
742 (wrxb :field (byte 4 0) :type 'wrxb)
743 (op :fields (list (byte 8 8) (byte 3 19)))
744 (reg/mem :fields (list (byte 2 22) (byte 3 16))
745 :type 'sized-reg/mem-default-qword))
747 ;;; Same as reg/mem, but with the immediate value occurring by default,
748 ;;; and with an appropiate printer.
749 (sb!disassem:define-instruction-format (reg/mem-imm 16
752 '(:name :tab reg/mem ", " imm))
753 (reg/mem :type 'sized-reg/mem)
754 (imm :type 'signed-imm-data))
756 (sb!disassem:define-instruction-format (rex-reg/mem-imm 24
757 :include 'rex-reg/mem
759 '(:name :tab reg/mem ", " imm))
760 (reg/mem :type 'sized-reg/mem)
761 (imm :type 'signed-imm-data))
763 ;;; Same as reg/mem, but with using the accumulator in the default printer
764 (sb!disassem:define-instruction-format
766 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
767 (reg/mem :type 'reg/mem) ; don't need a size
768 (accum :type 'accum))
770 (sb!disassem:define-instruction-format (rex-accum-reg/mem 24
771 :include 'rex-reg/mem
773 '(:name :tab accum ", " reg/mem))
774 (reg/mem :type 'reg/mem) ; don't need a size
775 (accum :type 'accum))
777 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
778 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
780 `(:name :tab reg ", " reg/mem))
781 (prefix :field (byte 8 0) :value #b00001111)
782 (op :field (byte 7 9))
783 (width :field (byte 1 8) :type 'width)
784 (reg/mem :fields (list (byte 2 22) (byte 3 16))
786 (reg :field (byte 3 19) :type 'reg)
790 (sb!disassem:define-instruction-format (ext-reg-reg/mem-no-width 24
792 `(:name :tab reg ", " reg/mem))
793 (prefix :field (byte 8 0) :value #b00001111)
794 (op :field (byte 8 8))
795 (reg/mem :fields (list (byte 2 22) (byte 3 16))
797 (reg :field (byte 3 19) :type 'reg))
799 (sb!disassem:define-instruction-format (rex-ext-reg-reg/mem-no-width 32
801 `(:name :tab reg ", " reg/mem))
802 (rex :field (byte 4 4) :value #b0100)
803 (wrxb :field (byte 4 0) :type 'wrxb)
804 (prefix :field (byte 8 8) :value #b00001111)
805 (op :field (byte 8 16))
806 (reg/mem :fields (list (byte 2 30) (byte 3 24))
808 (reg :field (byte 3 27) :type 'reg))
810 ;;; reg-no-width with #x0f prefix
811 (sb!disassem:define-instruction-format (ext-reg-no-width 16
812 :default-printer '(:name :tab reg))
813 (prefix :field (byte 8 0) :value #b00001111)
814 (op :field (byte 5 11))
815 (reg :field (byte 3 8) :type 'reg-b))
817 ;;; Same as reg/mem, but with a prefix of #b00001111
818 (sb!disassem:define-instruction-format (ext-reg/mem 24
819 :default-printer '(:name :tab reg/mem))
820 (prefix :field (byte 8 0) :value #b00001111)
821 (op :fields (list (byte 7 9) (byte 3 19)))
822 (width :field (byte 1 8) :type 'width)
823 (reg/mem :fields (list (byte 2 22) (byte 3 16))
824 :type 'sized-reg/mem)
828 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
829 :include 'ext-reg/mem
831 '(:name :tab reg/mem ", " imm))
832 (imm :type 'signed-imm-data))
834 ;;;; XMM instructions
836 ;;; All XMM instructions use an extended opcode (#x0F as the first
837 ;;; opcode byte). Therefore in the following "EXT" in the name of the
838 ;;; instruction formats refers to the formats that have an additional
839 ;;; prefix (#x66, #xF2 or #xF3).
841 ;;; Instructions having an XMM register as the destination operand
842 ;;; and an XMM register or a memory location as the source operand.
843 ;;; The size of the operands is implicitly given by the instruction.
844 (sb!disassem:define-instruction-format (xmm-xmm/mem 24
846 '(:name :tab reg ", " reg/mem))
847 (x0f :field (byte 8 0) :value #x0f)
848 (op :field (byte 8 8))
849 (reg/mem :fields (list (byte 2 22) (byte 3 16))
851 (reg :field (byte 3 19) :type 'xmmreg))
853 (sb!disassem:define-instruction-format (rex-xmm-xmm/mem 32
855 '(:name :tab reg ", " reg/mem))
856 (x0f :field (byte 8 0) :value #x0f)
857 (rex :field (byte 4 12) :value #b0100)
858 (wrxb :field (byte 4 8) :type 'wrxb)
859 (op :field (byte 8 16))
860 (reg/mem :fields (list (byte 2 30) (byte 3 24))
862 (reg :field (byte 3 27) :type 'xmmreg))
864 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem 32
866 '(:name :tab reg ", " reg/mem))
867 (prefix :field (byte 8 0))
868 (x0f :field (byte 8 8) :value #x0f)
869 (op :field (byte 8 16))
870 (reg/mem :fields (list (byte 2 30) (byte 3 24))
872 (reg :field (byte 3 27) :type 'xmmreg))
874 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem 40
876 '(:name :tab reg ", " reg/mem))
877 (prefix :field (byte 8 0))
878 (rex :field (byte 4 12) :value #b0100)
879 (wrxb :field (byte 4 8) :type 'wrxb)
880 (x0f :field (byte 8 16) :value #x0f)
881 (op :field (byte 8 24))
882 (reg/mem :fields (list (byte 2 38) (byte 3 32))
884 (reg :field (byte 3 35) :type 'xmmreg))
886 ;;; Same as xmm-xmm/mem etc., but with direction bit.
888 (sb!disassem:define-instruction-format (ext-xmm-xmm/mem-dir 32
889 :include 'ext-xmm-xmm/mem
893 ,(swap-if 'dir 'reg ", " 'reg/mem)))
894 (op :field (byte 7 17))
895 (dir :field (byte 1 16)))
897 (sb!disassem:define-instruction-format (ext-rex-xmm-xmm/mem-dir 40
898 :include 'ext-rex-xmm-xmm/mem
902 ,(swap-if 'dir 'reg ", " 'reg/mem)))
903 (op :field (byte 7 25))
904 (dir :field (byte 1 24)))
906 ;;; Instructions having an XMM register as one operand and a general-
907 ;;; -purpose register or a memory location as the other operand.
909 (sb!disassem:define-instruction-format (ext-xmm-reg/mem 32
911 '(:name :tab reg ", " reg/mem))
912 (prefix :field (byte 8 0))
913 (x0f :field (byte 8 8) :value #x0f)
914 (op :field (byte 8 16))
915 (reg/mem :fields (list (byte 2 30) (byte 3 24))
916 :type 'sized-reg/mem)
917 (reg :field (byte 3 27) :type 'xmmreg))
919 (sb!disassem:define-instruction-format (ext-rex-xmm-reg/mem 40
921 '(:name :tab reg ", " reg/mem))
922 (prefix :field (byte 8 0))
923 (rex :field (byte 4 12) :value #b0100)
924 (wrxb :field (byte 4 8) :type 'wrxb)
925 (x0f :field (byte 8 16) :value #x0f)
926 (op :field (byte 8 24))
927 (reg/mem :fields (list (byte 2 38) (byte 3 32))
928 :type 'sized-reg/mem)
929 (reg :field (byte 3 35) :type 'xmmreg))
931 ;;; Instructions having a general-purpose register as one operand and an
932 ;;; XMM register or a memory location as the other operand.
934 (sb!disassem:define-instruction-format (ext-reg-xmm/mem 32
936 '(:name :tab reg ", " reg/mem))
937 (prefix :field (byte 8 0))
938 (x0f :field (byte 8 8) :value #x0f)
939 (op :field (byte 8 16))
940 (reg/mem :fields (list (byte 2 30) (byte 3 24))
941 :type 'sized-xmmreg/mem)
942 (reg :field (byte 3 27) :type 'reg))
944 (sb!disassem:define-instruction-format (ext-rex-reg-xmm/mem 40
946 '(:name :tab reg ", " reg/mem))
947 (prefix :field (byte 8 0))
948 (rex :field (byte 4 12) :value #b0100)
949 (wrxb :field (byte 4 8) :type 'wrxb)
950 (x0f :field (byte 8 16) :value #x0f)
951 (op :field (byte 8 24))
952 (reg/mem :fields (list (byte 2 38) (byte 3 32))
953 :type 'sized-xmmreg/mem)
954 (reg :field (byte 3 35) :type 'reg))
956 ;;;; This section was added by jrd, for fp instructions.
958 ;;; regular fp inst to/from registers/memory
959 (sb!disassem:define-instruction-format (floating-point 16
961 `(:name :tab reg/mem))
962 (prefix :field (byte 5 3) :value #b11011)
963 (op :fields (list (byte 3 0) (byte 3 11)))
964 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
966 ;;; fp insn to/from fp reg
967 (sb!disassem:define-instruction-format (floating-point-fp 16
968 :default-printer `(:name :tab fp-reg))
969 (prefix :field (byte 5 3) :value #b11011)
970 (suffix :field (byte 2 14) :value #b11)
971 (op :fields (list (byte 3 0) (byte 3 11)))
972 (fp-reg :field (byte 3 8) :type 'fp-reg))
974 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
975 (sb!disassem:define-instruction-format
976 (floating-point-fp-d 16
977 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
978 (prefix :field (byte 5 3) :value #b11011)
979 (suffix :field (byte 2 14) :value #b11)
980 (op :fields (list (byte 2 0) (byte 3 11)))
981 (d :field (byte 1 2))
982 (fp-reg :field (byte 3 8) :type 'fp-reg))
985 ;;; (added by (?) pfw)
986 ;;; fp no operand isns
987 (sb!disassem:define-instruction-format (floating-point-no 16
988 :default-printer '(:name))
989 (prefix :field (byte 8 0) :value #b11011001)
990 (suffix :field (byte 3 13) :value #b111)
991 (op :field (byte 5 8)))
993 (sb!disassem:define-instruction-format (floating-point-3 16
994 :default-printer '(:name))
995 (prefix :field (byte 5 3) :value #b11011)
996 (suffix :field (byte 2 14) :value #b11)
997 (op :fields (list (byte 3 0) (byte 6 8))))
999 (sb!disassem:define-instruction-format (floating-point-5 16
1000 :default-printer '(:name))
1001 (prefix :field (byte 8 0) :value #b11011011)
1002 (suffix :field (byte 3 13) :value #b111)
1003 (op :field (byte 5 8)))
1005 (sb!disassem:define-instruction-format (floating-point-st 16
1006 :default-printer '(:name))
1007 (prefix :field (byte 8 0) :value #b11011111)
1008 (suffix :field (byte 3 13) :value #b111)
1009 (op :field (byte 5 8)))
1011 (sb!disassem:define-instruction-format (string-op 8
1013 :default-printer '(:name width)))
1015 (sb!disassem:define-instruction-format (rex-string-op 16
1016 :include 'rex-simple
1017 :default-printer '(:name width)))
1019 (sb!disassem:define-instruction-format (short-cond-jump 16)
1020 (op :field (byte 4 4))
1021 (cc :field (byte 4 0) :type 'condition-code)
1022 (label :field (byte 8 8) :type 'displacement))
1024 (sb!disassem:define-instruction-format (short-jump 16
1025 :default-printer '(:name :tab label))
1026 (const :field (byte 4 4) :value #b1110)
1027 (op :field (byte 4 0))
1028 (label :field (byte 8 8) :type 'displacement))
1030 (sb!disassem:define-instruction-format (near-cond-jump 16)
1031 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
1032 (cc :field (byte 4 8) :type 'condition-code)
1033 ;; The disassembler currently doesn't let you have an instruction > 32 bits
1034 ;; long, so we fake it by using a prefilter to read the offset.
1035 (label :type 'displacement
1036 :prefilter (lambda (value dstate)
1037 (declare (ignore value)) ; always nil anyway
1038 (sb!disassem:read-signed-suffix 32 dstate))))
1040 (sb!disassem:define-instruction-format (near-jump 8
1041 :default-printer '(:name :tab label))
1042 (op :field (byte 8 0))
1043 ;; The disassembler currently doesn't let you have an instruction > 32 bits
1044 ;; long, so we fake it by using a prefilter to read the address.
1045 (label :type 'displacement
1046 :prefilter (lambda (value dstate)
1047 (declare (ignore value)) ; always nil anyway
1048 (sb!disassem:read-signed-suffix 32 dstate))))
1051 (sb!disassem:define-instruction-format (cond-set 24
1052 :default-printer '('set cc :tab reg/mem))
1053 (prefix :field (byte 8 0) :value #b00001111)
1054 (op :field (byte 4 12) :value #b1001)
1055 (cc :field (byte 4 8) :type 'condition-code)
1056 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1057 :type 'sized-byte-reg/mem)
1058 (reg :field (byte 3 19) :value #b000))
1060 (sb!disassem:define-instruction-format (cond-move 24
1062 '('cmov cc :tab reg ", " reg/mem))
1063 (prefix :field (byte 8 0) :value #b00001111)
1064 (op :field (byte 4 12) :value #b0100)
1065 (cc :field (byte 4 8) :type 'condition-code)
1066 (reg/mem :fields (list (byte 2 22) (byte 3 16))
1068 (reg :field (byte 3 19) :type 'reg))
1070 (sb!disassem:define-instruction-format (rex-cond-move 32
1072 '('cmov cc :tab reg ", " reg/mem))
1073 (rex :field (byte 4 4) :value #b0100)
1074 (wrxb :field (byte 4 0) :type 'wrxb)
1075 (prefix :field (byte 8 8) :value #b00001111)
1076 (op :field (byte 4 20) :value #b0100)
1077 (cc :field (byte 4 16) :type 'condition-code)
1078 (reg/mem :fields (list (byte 2 30) (byte 3 24))
1080 (reg :field (byte 3 27) :type 'reg))
1082 (sb!disassem:define-instruction-format (enter-format 32
1083 :default-printer '(:name
1085 (:unless (:constant 0)
1087 (op :field (byte 8 0))
1088 (disp :field (byte 16 8))
1089 (level :field (byte 8 24)))
1091 ;;; Single byte instruction with an immediate byte argument.
1092 (sb!disassem:define-instruction-format (byte-imm 16
1093 :default-printer '(:name :tab code))
1094 (op :field (byte 8 0))
1095 (code :field (byte 8 8)))
1097 ;;;; primitive emitters
1099 (define-bitfield-emitter emit-word 16
1102 (define-bitfield-emitter emit-dword 32
1105 (define-bitfield-emitter emit-qword 64
1108 (define-bitfield-emitter emit-byte-with-reg 8
1109 (byte 5 3) (byte 3 0))
1111 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
1112 (byte 2 6) (byte 3 3) (byte 3 0))
1114 (define-bitfield-emitter emit-sib-byte 8
1115 (byte 2 6) (byte 3 3) (byte 3 0))
1117 (define-bitfield-emitter emit-rex-byte 8
1118 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1124 (defun emit-absolute-fixup (segment fixup &optional quad-p)
1125 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
1126 (let ((offset (fixup-offset fixup)))
1127 (if (label-p offset)
1128 (emit-back-patch segment
1130 (lambda (segment posn)
1131 (declare (ignore posn))
1132 (let ((val (- (+ (component-header-length)
1133 (or (label-position offset)
1135 other-pointer-lowtag)))
1137 (emit-qword segment val )
1138 (emit-dword segment val )))))
1140 (emit-qword segment (or offset 0))
1141 (emit-dword segment (or offset 0))))))
1143 (defun emit-relative-fixup (segment fixup)
1144 (note-fixup segment :relative fixup)
1145 (emit-dword segment (or (fixup-offset fixup) 0)))
1148 ;;;; the effective-address (ea) structure
1150 (defun reg-tn-encoding (tn)
1151 (declare (type tn tn))
1152 ;; ea only has space for three bits of register number: regs r8
1153 ;; and up are selected by a REX prefix byte which caller is responsible
1154 ;; for having emitted where necessary already
1155 (ecase (sb-name (sc-sb (tn-sc tn)))
1157 (let ((offset (mod (tn-offset tn) 16)))
1158 (logior (ash (logand offset 1) 2)
1161 (mod (tn-offset tn) 8))))
1163 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1165 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1166 ;; can't actually emit it on its own: caller also needs to emit REX
1168 (size nil :type (member :byte :word :dword :qword))
1169 (base nil :type (or tn null))
1170 (index nil :type (or tn null))
1171 (scale 1 :type (member 1 2 4 8))
1172 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1173 (def!method print-object ((ea ea) stream)
1174 (cond ((or *print-escape* *print-readably*)
1175 (print-unreadable-object (ea stream :type t)
1177 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1181 (let ((scale (ea-scale ea)))
1182 (if (= scale 1) nil scale))
1185 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1187 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1189 (write-string "+" stream)))
1191 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1192 (unless (= (ea-scale ea) 1)
1193 (format stream "*~A" (ea-scale ea)))
1194 (typecase (ea-disp ea)
1197 (format stream "~@D" (ea-disp ea)))
1199 (format stream "+~A" (ea-disp ea))))
1200 (write-char #\] stream))))
1202 (defun emit-constant-tn-rip (segment constant-tn reg)
1203 ;; AMD64 doesn't currently have a code object register to use as a
1204 ;; base register for constant access. Instead we use RIP-relative
1205 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1206 ;; is passed to the backpatch callback. In addition we need the offset
1207 ;; from the start of the function header to the slot in the CODE-HEADER
1208 ;; that stores the constant. Since we don't know where the code header
1209 ;; starts, instead count backwards from the function header.
1210 (let* ((2comp (component-info *component-being-compiled*))
1211 (constants (ir2-component-constants 2comp))
1212 (len (length constants))
1213 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1214 ;; If there are an even amount of constants, there will be
1215 ;; an extra qword of padding before the function header, which
1216 ;; needs to be adjusted for. XXX: This will break if new slots
1217 ;; are added to the code header.
1218 (offset (* (- (+ len (if (evenp len)
1221 (tn-offset constant-tn))
1223 ;; RIP-relative addressing
1224 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1225 (emit-back-patch segment
1227 (lambda (segment posn)
1228 ;; The addressing is relative to end of instruction,
1229 ;; i.e. the end of this dword. Hence the + 4.
1230 (emit-dword segment (+ 4 (- (+ offset posn)))))))
1233 (defun emit-label-rip (segment fixup reg)
1234 (let ((label (fixup-offset fixup)))
1235 ;; RIP-relative addressing
1236 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1237 (emit-back-patch segment
1239 (lambda (segment posn)
1240 (emit-dword segment (- (label-position label)
1244 (defun emit-ea (segment thing reg &optional allow-constants)
1247 ;; this would be eleganter if we had a function that would create
1249 (ecase (sb-name (sc-sb (tn-sc thing)))
1250 ((registers float-registers)
1251 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1253 ;; Convert stack tns into an index off RBP.
1254 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
1255 (cond ((< -128 disp 127)
1256 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1257 (emit-byte segment disp))
1259 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1260 (emit-dword segment disp)))))
1262 (unless allow-constants
1265 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1266 (emit-constant-tn-rip segment thing reg))))
1268 (let* ((base (ea-base thing))
1269 (index (ea-index thing))
1270 (scale (ea-scale thing))
1271 (disp (ea-disp thing))
1272 (mod (cond ((or (null base)
1274 (not (= (reg-tn-encoding base) #b101))))
1276 ((and (fixnump disp) (<= -128 disp 127))
1280 (r/m (cond (index #b100)
1282 (t (reg-tn-encoding base)))))
1283 (when (and (= mod 0) (= r/m #b101))
1284 ;; this is rip-relative in amd64, so we'll use a sib instead
1285 (setf r/m #b100 scale 1))
1286 (emit-mod-reg-r/m-byte segment mod reg r/m)
1288 (let ((ss (1- (integer-length scale)))
1289 (index (if (null index)
1291 (let ((index (reg-tn-encoding index)))
1293 (error "can't index off of ESP")
1295 (base (if (null base)
1297 (reg-tn-encoding base))))
1298 (emit-sib-byte segment ss index base)))
1300 (emit-byte segment disp))
1301 ((or (= mod #b10) (null base))
1303 (emit-absolute-fixup segment disp)
1304 (emit-dword segment disp))))))
1306 (typecase (fixup-offset thing)
1308 (emit-label-rip segment thing reg))
1310 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1311 (emit-sib-byte segment 0 #b100 #b101)
1312 (emit-absolute-fixup segment thing))))))
1314 ;;; like the above, but for fp-instructions--jrd
1315 (defun emit-fp-op (segment thing op)
1316 (if (fp-reg-tn-p thing)
1317 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
1320 (emit-ea segment thing op)))
1322 (defun byte-reg-p (thing)
1324 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1325 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1328 (defun byte-ea-p (thing)
1330 (ea (eq (ea-size thing) :byte))
1332 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1335 (defun word-reg-p (thing)
1337 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1338 (member (sc-name (tn-sc thing)) *word-sc-names*)
1341 (defun word-ea-p (thing)
1343 (ea (eq (ea-size thing) :word))
1344 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1347 (defun dword-reg-p (thing)
1349 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1350 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1353 (defun dword-ea-p (thing)
1355 (ea (eq (ea-size thing) :dword))
1357 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1360 (defun qword-reg-p (thing)
1362 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1363 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1366 (defun qword-ea-p (thing)
1368 (ea (eq (ea-size thing) :qword))
1370 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1373 ;;; Return true if THING is a general-purpose register TN.
1374 (defun register-p (thing)
1376 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1378 (defun accumulator-p (thing)
1379 (and (register-p thing)
1380 (= (tn-offset thing) 0)))
1382 ;;; Return true if THING is an XMM register TN.
1383 (defun xmm-register-p (thing)
1385 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1390 (def!constant +operand-size-prefix-byte+ #b01100110)
1392 (defun maybe-emit-operand-size-prefix (segment size)
1393 (unless (or (eq size :byte)
1394 (eq size :qword) ; REX prefix handles this
1395 (eq size +default-operand-size+))
1396 (emit-byte segment +operand-size-prefix-byte+)))
1398 ;;; A REX prefix must be emitted if at least one of the following
1399 ;;; conditions is true:
1400 ;; 1. The operand size is :QWORD and the default operand size of the
1401 ;; instruction is not :QWORD.
1402 ;;; 2. The instruction references an extended register.
1403 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1406 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1407 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1408 ;;; this should not happen, for example because the instruction's
1409 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1410 ;;; registers the encodings of which are extended with the REX.R, REX.X
1411 ;;; and REX.B bit, respectively. To determine whether one of the byte
1412 ;;; registers is used that can only be accessed using a REX prefix, we
1413 ;;; need only to test R and B, because X is only used for the index
1414 ;;; register of an effective address and therefore never byte-sized.
1415 ;;; For R we can avoid to calculate the size of the TN because it is
1416 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1417 ;;; B can be address-sized (if it is the base register of an effective
1418 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1419 ;;; registers) or of some different size (in the instructions that
1420 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1421 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1422 ;;; between general-purpose and floating point registers for this cause
1423 ;;; because only general-purpose registers can be byte-sized at all.
1424 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1425 (declare (type (member nil :byte :word :dword :qword :do-not-set)
1427 (type (or null tn) r x b))
1429 (if (and r (> (tn-offset r)
1430 ;; offset of r8 is 16, offset of xmm8 is 8
1431 (if (eq (sb-name (sc-sb (tn-sc r)))
1438 ;; Assuming R is a TN describing a general-purpose
1439 ;; register, return true if it references register
1441 (<= 8 (tn-offset r) 15)))
1442 (let ((rex-w (if (eq operand-size :qword) 1 0))
1446 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1448 (eq operand-size :byte)
1451 (eq (operand-size b) :byte)
1453 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1455 ;;; Emit a REX prefix if necessary. The operand size is determined from
1456 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1457 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1458 ;;; pass its index and base registers, if it is a register TN, we pass
1460 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1461 ;;; be treated specially here: If THING is a stack TN, neither it nor
1462 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1463 ;;; works correctly because stack references always use RBP as the base
1464 ;;; register and never use an index register so no extended registers
1465 ;;; need to be accessed. Fixups are assembled using an addressing mode
1466 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1467 ;;; not reference an extended register. The displacement-only addressing
1468 ;;; mode requires that REX.X is 0, which is ensured here.
1469 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1470 (declare (type (or ea tn fixup) thing)
1471 (type (or null tn) reg)
1472 (type (member nil :byte :word :dword :qword :do-not-set)
1474 (let ((ea-p (ea-p thing)))
1475 (maybe-emit-rex-prefix segment
1476 (or operand-size (operand-size thing))
1478 (and ea-p (ea-index thing))
1479 (cond (ea-p (ea-base thing))
1481 (member (sb-name (sc-sb (tn-sc thing)))
1482 '(float-registers registers)))
1486 (defun operand-size (thing)
1489 ;; FIXME: might as well be COND instead of having to use #. readmacro
1490 ;; to hack up the code
1491 (case (sc-name (tn-sc thing))
1500 ;; added by jrd: float-registers is a separate size (?)
1501 ;; The only place in the code where we are called with THING
1502 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1503 ;; checks whether THING is a byte register. Thus our result in
1504 ;; these cases could as well be :dword and :qword. I leave it as
1505 ;; :float and :double which is more likely to trigger an aver
1506 ;; instead of silently doing the wrong thing in case this
1507 ;; situation should change. Lutz Euler, 2005-10-23.
1510 (#.*double-sc-names*
1513 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1517 ;; GNA. Guess who spelt "flavor" correctly first time round?
1518 ;; There's a strong argument in my mind to change all uses of
1519 ;; "flavor" to "kind": and similarly with some misguided uses of
1520 ;; "type" here and there. -- CSR, 2005-01-06.
1521 (case (fixup-flavor thing)
1522 ((:foreign-dataref) :qword)))
1526 (defun matching-operand-size (dst src)
1527 (let ((dst-size (operand-size dst))
1528 (src-size (operand-size src)))
1531 (if (eq dst-size src-size)
1533 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1534 dst dst-size src src-size))
1538 (error "can't tell the size of either ~S or ~S" dst src)))))
1540 (defun emit-sized-immediate (segment size value &optional quad-p)
1543 (emit-byte segment value))
1545 (emit-word segment value))
1547 ;; except in a very few cases (MOV instructions A1,A3,B8) we expect
1548 ;; dword data bytes even when 64 bit work is being done. So, mostly
1549 ;; we treat quad constants as dwords.
1550 (if (and quad-p (eq size :qword))
1551 (emit-qword segment value)
1552 (emit-dword segment value)))))
1554 ;;;; general data transfer
1556 (define-instruction mov (segment dst src)
1557 ;; immediate to register
1558 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1559 '(:name :tab reg ", " imm))
1560 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1561 '(:name :tab reg ", " imm))
1562 ;; absolute mem to/from accumulator
1563 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1564 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1565 ;; register to/from register/memory
1566 (:printer reg-reg/mem-dir ((op #b100010)))
1567 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1568 ;; immediate to register/memory
1569 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1570 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1573 (let ((size (matching-operand-size dst src)))
1574 (maybe-emit-operand-size-prefix segment size)
1575 (cond ((register-p dst)
1576 (cond ((integerp src)
1577 (maybe-emit-rex-prefix segment size nil nil dst)
1578 (cond ((and (eq size :qword)
1579 (typep src '(signed-byte 32)))
1580 ;; When loading small immediates to a qword register
1581 ;; using B8 wastes 3 bytes compared to C7.
1582 (emit-byte segment #b11000111)
1583 (emit-mod-reg-r/m-byte segment #b11
1585 (reg-tn-encoding dst))
1586 (emit-sized-immediate segment :dword src nil))
1588 (emit-byte-with-reg segment
1592 (reg-tn-encoding dst))
1593 (emit-sized-immediate segment size src
1594 (eq size :qword)))))
1596 (maybe-emit-rex-for-ea segment src dst)
1601 (emit-ea segment src (reg-tn-encoding dst) t))))
1603 ;; C7 only deals with 32 bit immediates even if register is
1604 ;; 64 bit: only b8-bf use 64 bit immediates
1605 (maybe-emit-rex-for-ea segment dst nil)
1606 (cond ((typep src '(or (signed-byte 32) (unsigned-byte 32)))
1608 (if (eq size :byte) #b11000110 #b11000111))
1609 (emit-ea segment dst #b000)
1610 (emit-sized-immediate segment
1611 (case size (:qword :dword) (t size))
1616 (maybe-emit-rex-for-ea segment dst src)
1617 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1618 (emit-ea segment dst (reg-tn-encoding src)))
1620 ;; Generally we can't MOV a fixupped value into an EA, since
1621 ;; MOV on non-registers can only take a 32-bit immediate arg.
1622 ;; Make an exception for :FOREIGN fixups (pretty much just
1623 ;; the runtime asm, since other foreign calls go through the
1624 ;; the linkage table) and for linkage table references, since
1625 ;; these should always end up in low memory.
1626 (aver (or (eq (fixup-flavor src) :foreign)
1627 (eq (fixup-flavor src) :foreign-dataref)
1628 (eq (ea-size dst) :dword)))
1629 (maybe-emit-rex-for-ea segment dst nil)
1630 (emit-byte segment #b11000111)
1631 (emit-ea segment dst #b000)
1632 (emit-absolute-fixup segment src))
1634 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1636 (defun emit-move-with-extension (segment dst src signed-p)
1637 (aver (register-p dst))
1638 (let ((dst-size (operand-size dst))
1639 (src-size (operand-size src))
1640 (opcode (if signed-p #b10111110 #b10110110)))
1643 (aver (eq src-size :byte))
1644 (maybe-emit-operand-size-prefix segment :word)
1645 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1646 (maybe-emit-rex-for-ea segment src dst :operand-size :word)
1647 (emit-byte segment #b00001111)
1648 (emit-byte segment opcode)
1649 (emit-ea segment src (reg-tn-encoding dst)))
1653 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1654 (emit-byte segment #b00001111)
1655 (emit-byte segment opcode)
1656 (emit-ea segment src (reg-tn-encoding dst)))
1658 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1659 (emit-byte segment #b00001111)
1660 (emit-byte segment (logior opcode 1))
1661 (emit-ea segment src (reg-tn-encoding dst)))
1663 (aver (eq dst-size :qword))
1664 ;; dst is in reg, src is in modrm
1665 (let ((ea-p (ea-p src)))
1666 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1667 (and ea-p (ea-index src))
1668 (cond (ea-p (ea-base src))
1671 (emit-byte segment #x63) ;movsxd
1672 ;;(emit-byte segment opcode)
1673 (emit-ea segment src (reg-tn-encoding dst)))))))))
1675 (define-instruction movsx (segment dst src)
1676 (:printer ext-reg-reg/mem-no-width
1677 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1678 (:printer rex-ext-reg-reg/mem-no-width
1679 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1680 (:printer ext-reg-reg/mem-no-width
1681 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1682 (:printer rex-ext-reg-reg/mem-no-width
1683 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1684 (:emitter (emit-move-with-extension segment dst src :signed)))
1686 (define-instruction movzx (segment dst src)
1687 (:printer ext-reg-reg/mem-no-width
1688 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1689 (:printer rex-ext-reg-reg/mem-no-width
1690 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1691 (:printer ext-reg-reg/mem-no-width
1692 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1693 (:printer rex-ext-reg-reg/mem-no-width
1694 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1695 (:emitter (emit-move-with-extension segment dst src nil)))
1697 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1698 ;;; sign-extends the dword source into the qword destination register.
1699 ;;; If the operand size is :dword the instruction zero-extends the dword
1700 ;;; source into the qword destination register, i.e. it does the same as
1701 ;;; a dword MOV into a register.
1702 (define-instruction movsxd (segment dst src)
1703 (:printer reg-reg/mem ((op #b0110001) (width 1)
1704 (reg/mem nil :type 'sized-dword-reg/mem)))
1705 (:printer rex-reg-reg/mem ((op #b0110001) (width 1)
1706 (reg/mem nil :type 'sized-dword-reg/mem)))
1707 (:emitter (emit-move-with-extension segment dst src :signed)))
1709 ;;; this is not a real amd64 instruction, of course
1710 (define-instruction movzxd (segment dst src)
1711 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1712 (:emitter (emit-move-with-extension segment dst src nil)))
1714 (define-instruction push (segment src)
1716 (:printer reg-no-width-default-qword ((op #b01010)))
1717 (:printer rex-reg-no-width-default-qword ((op #b01010)))
1719 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1720 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b110))))
1722 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1724 (:printer byte ((op #b01101000)
1725 (imm nil :type 'signed-imm-data-default-qword))
1727 ;; ### segment registers?
1730 (cond ((integerp src)
1731 (cond ((<= -128 src 127)
1732 (emit-byte segment #b01101010)
1733 (emit-byte segment src))
1735 ;; A REX-prefix is not needed because the operand size
1736 ;; defaults to 64 bits. The size of the immediate is 32
1737 ;; bits and it is sign-extended.
1738 (emit-byte segment #b01101000)
1739 (emit-dword segment src))))
1741 (let ((size (operand-size src)))
1742 (aver (not (eq size :byte)))
1743 (maybe-emit-operand-size-prefix segment size)
1744 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1745 (cond ((register-p src)
1746 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1748 (emit-byte segment #b11111111)
1749 (emit-ea segment src #b110 t))))))))
1751 (define-instruction pop (segment dst)
1752 (:printer reg-no-width-default-qword ((op #b01011)))
1753 (:printer rex-reg-no-width-default-qword ((op #b01011)))
1754 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1755 (:printer rex-reg/mem-default-qword ((op '(#b10001111 #b000))))
1757 (let ((size (operand-size dst)))
1758 (aver (not (eq size :byte)))
1759 (maybe-emit-operand-size-prefix segment size)
1760 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1761 (cond ((register-p dst)
1762 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1764 (emit-byte segment #b10001111)
1765 (emit-ea segment dst #b000))))))
1767 (define-instruction xchg (segment operand1 operand2)
1768 ;; Register with accumulator.
1769 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1770 ;; Register/Memory with Register.
1771 (:printer reg-reg/mem ((op #b1000011)))
1772 (:printer rex-reg-reg/mem ((op #b1000011)))
1774 (let ((size (matching-operand-size operand1 operand2)))
1775 (maybe-emit-operand-size-prefix segment size)
1776 (labels ((xchg-acc-with-something (acc something)
1777 (if (and (not (eq size :byte)) (register-p something))
1779 (maybe-emit-rex-for-ea segment acc something)
1780 (emit-byte-with-reg segment
1782 (reg-tn-encoding something)))
1783 (xchg-reg-with-something acc something)))
1784 (xchg-reg-with-something (reg something)
1785 (maybe-emit-rex-for-ea segment something reg)
1786 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1787 (emit-ea segment something (reg-tn-encoding reg))))
1788 (cond ((accumulator-p operand1)
1789 (xchg-acc-with-something operand1 operand2))
1790 ((accumulator-p operand2)
1791 (xchg-acc-with-something operand2 operand1))
1792 ((register-p operand1)
1793 (xchg-reg-with-something operand1 operand2))
1794 ((register-p operand2)
1795 (xchg-reg-with-something operand2 operand1))
1797 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1799 (define-instruction lea (segment dst src)
1800 (:printer rex-reg-reg/mem ((op #b1000110)))
1801 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1803 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1804 (maybe-emit-rex-for-ea segment src dst
1805 :operand-size :qword)
1806 (emit-byte segment #b10001101)
1807 (emit-ea segment src (reg-tn-encoding dst))))
1809 (define-instruction cmpxchg (segment dst src)
1810 ;; Register/Memory with Register.
1811 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1813 (aver (register-p src))
1814 (let ((size (matching-operand-size src dst)))
1815 (maybe-emit-operand-size-prefix segment size)
1816 (maybe-emit-rex-for-ea segment dst src)
1817 (emit-byte segment #b00001111)
1818 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1819 (emit-ea segment dst (reg-tn-encoding src)))))
1823 (define-instruction fs-segment-prefix (segment)
1825 (emit-byte segment #x64)))
1827 ;;;; flag control instructions
1829 ;;; CLC -- Clear Carry Flag.
1830 (define-instruction clc (segment)
1831 (:printer byte ((op #b11111000)))
1833 (emit-byte segment #b11111000)))
1835 ;;; CLD -- Clear Direction Flag.
1836 (define-instruction cld (segment)
1837 (:printer byte ((op #b11111100)))
1839 (emit-byte segment #b11111100)))
1841 ;;; CLI -- Clear Iterrupt Enable Flag.
1842 (define-instruction cli (segment)
1843 (:printer byte ((op #b11111010)))
1845 (emit-byte segment #b11111010)))
1847 ;;; CMC -- Complement Carry Flag.
1848 (define-instruction cmc (segment)
1849 (:printer byte ((op #b11110101)))
1851 (emit-byte segment #b11110101)))
1853 ;;; LAHF -- Load AH into flags.
1854 (define-instruction lahf (segment)
1855 (:printer byte ((op #b10011111)))
1857 (emit-byte segment #b10011111)))
1859 ;;; POPF -- Pop flags.
1860 (define-instruction popf (segment)
1861 (:printer byte ((op #b10011101)))
1863 (emit-byte segment #b10011101)))
1865 ;;; PUSHF -- push flags.
1866 (define-instruction pushf (segment)
1867 (:printer byte ((op #b10011100)))
1869 (emit-byte segment #b10011100)))
1871 ;;; SAHF -- Store AH into flags.
1872 (define-instruction sahf (segment)
1873 (:printer byte ((op #b10011110)))
1875 (emit-byte segment #b10011110)))
1877 ;;; STC -- Set Carry Flag.
1878 (define-instruction stc (segment)
1879 (:printer byte ((op #b11111001)))
1881 (emit-byte segment #b11111001)))
1883 ;;; STD -- Set Direction Flag.
1884 (define-instruction std (segment)
1885 (:printer byte ((op #b11111101)))
1887 (emit-byte segment #b11111101)))
1889 ;;; STI -- Set Interrupt Enable Flag.
1890 (define-instruction sti (segment)
1891 (:printer byte ((op #b11111011)))
1893 (emit-byte segment #b11111011)))
1897 (defun emit-random-arith-inst (name segment dst src opcode
1898 &optional allow-constants)
1899 (let ((size (matching-operand-size dst src)))
1900 (maybe-emit-operand-size-prefix segment size)
1903 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1904 (maybe-emit-rex-for-ea segment dst nil)
1905 (emit-byte segment #b10000011)
1906 (emit-ea segment dst opcode allow-constants)
1907 (emit-byte segment src))
1908 ((accumulator-p dst)
1909 (maybe-emit-rex-for-ea segment dst nil)
1916 (emit-sized-immediate segment size src))
1918 (maybe-emit-rex-for-ea segment dst nil)
1919 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1920 (emit-ea segment dst opcode allow-constants)
1921 (emit-sized-immediate segment size src))))
1923 (maybe-emit-rex-for-ea segment dst src)
1927 (if (eq size :byte) #b00000000 #b00000001)))
1928 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1930 (maybe-emit-rex-for-ea segment src dst)
1934 (if (eq size :byte) #b00000010 #b00000011)))
1935 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1937 (error "bogus operands to ~A" name)))))
1939 (eval-when (:compile-toplevel :execute)
1940 (defun arith-inst-printer-list (subop)
1941 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1942 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1943 (reg/mem-imm ((op (#b1000000 ,subop))))
1944 (rex-reg/mem-imm ((op (#b1000000 ,subop))))
1945 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1946 ;; therefore we force WIDTH to 1.
1947 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1948 (imm nil :type signed-imm-byte)))
1949 (rex-reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1950 (imm nil :type signed-imm-byte)))
1951 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
1952 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1955 (define-instruction add (segment dst src)
1956 (:printer-list (arith-inst-printer-list #b000))
1957 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1959 (define-instruction adc (segment dst src)
1960 (:printer-list (arith-inst-printer-list #b010))
1961 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1963 (define-instruction sub (segment dst src)
1964 (:printer-list (arith-inst-printer-list #b101))
1965 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1967 (define-instruction sbb (segment dst src)
1968 (:printer-list (arith-inst-printer-list #b011))
1969 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1971 (define-instruction cmp (segment dst src)
1972 (:printer-list (arith-inst-printer-list #b111))
1973 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1975 (define-instruction inc (segment dst)
1977 (:printer modrm-reg-no-width ((modrm-reg #b000)))
1979 ;; (:printer rex-reg/mem ((op '(#b11111111 #b001))))
1980 (:printer reg/mem ((op '(#b1111111 #b000))))
1982 (let ((size (operand-size dst)))
1983 (maybe-emit-operand-size-prefix segment size)
1984 (cond #+nil ; these opcodes become REX prefixes in x86-64
1985 ((and (not (eq size :byte)) (register-p dst))
1986 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1988 (maybe-emit-rex-for-ea segment dst nil)
1989 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1990 (emit-ea segment dst #b000))))))
1992 (define-instruction dec (segment dst)
1994 (:printer modrm-reg-no-width ((modrm-reg #b001)))
1996 (:printer reg/mem ((op '(#b1111111 #b001))))
1998 (let ((size (operand-size dst)))
1999 (maybe-emit-operand-size-prefix segment size)
2001 ((and (not (eq size :byte)) (register-p dst))
2002 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
2004 (maybe-emit-rex-for-ea segment dst nil)
2005 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2006 (emit-ea segment dst #b001))))))
2008 (define-instruction neg (segment dst)
2009 (:printer reg/mem ((op '(#b1111011 #b011))))
2010 (:printer rex-reg/mem ((op '(#b1111011 #b011))))
2012 (let ((size (operand-size dst)))
2013 (maybe-emit-operand-size-prefix segment size)
2014 (maybe-emit-rex-for-ea segment dst nil)
2015 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2016 (emit-ea segment dst #b011))))
2018 (define-instruction mul (segment dst src)
2019 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
2020 (:printer rex-accum-reg/mem ((op '(#b1111011 #b100))))
2022 (let ((size (matching-operand-size dst src)))
2023 (aver (accumulator-p dst))
2024 (maybe-emit-operand-size-prefix segment size)
2025 (maybe-emit-rex-for-ea segment src nil)
2026 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2027 (emit-ea segment src #b100))))
2029 (define-instruction imul (segment dst &optional src1 src2)
2030 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
2031 (:printer rex-accum-reg/mem ((op '(#b1111011 #b101))))
2032 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
2033 (:printer rex-ext-reg-reg/mem-no-width ((op #b10101111)))
2034 (:printer reg-reg/mem ((op #b0110100) (width 1)
2035 (imm nil :type 'signed-imm-data))
2036 '(:name :tab reg ", " reg/mem ", " imm))
2037 (:printer rex-reg-reg/mem ((op #b0110100) (width 1)
2038 (imm nil :type 'signed-imm-data))
2039 '(:name :tab reg ", " reg/mem ", " imm))
2040 (:printer reg-reg/mem ((op #b0110101) (width 1)
2041 (imm nil :type 'signed-imm-byte))
2042 '(:name :tab reg ", " reg/mem ", " imm))
2043 (:printer rex-reg-reg/mem ((op #b0110101) (width 1)
2044 (imm nil :type 'signed-imm-byte))
2045 '(:name :tab reg ", " reg/mem ", " imm))
2047 (flet ((r/m-with-immed-to-reg (reg r/m immed)
2048 (let* ((size (matching-operand-size reg r/m))
2049 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
2050 (maybe-emit-operand-size-prefix segment size)
2051 (maybe-emit-rex-for-ea segment r/m reg)
2052 (emit-byte segment (if sx #b01101011 #b01101001))
2053 (emit-ea segment r/m (reg-tn-encoding reg))
2055 (emit-byte segment immed)
2056 (emit-sized-immediate segment size immed)))))
2058 (r/m-with-immed-to-reg dst src1 src2))
2061 (r/m-with-immed-to-reg dst dst src1)
2062 (let ((size (matching-operand-size dst src1)))
2063 (maybe-emit-operand-size-prefix segment size)
2064 (maybe-emit-rex-for-ea segment src1 dst)
2065 (emit-byte segment #b00001111)
2066 (emit-byte segment #b10101111)
2067 (emit-ea segment src1 (reg-tn-encoding dst)))))
2069 (let ((size (operand-size dst)))
2070 (maybe-emit-operand-size-prefix segment size)
2071 (maybe-emit-rex-for-ea segment dst nil)
2072 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2073 (emit-ea segment dst #b101)))))))
2075 (define-instruction div (segment dst src)
2076 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
2077 (:printer rex-accum-reg/mem ((op '(#b1111011 #b110))))
2079 (let ((size (matching-operand-size dst src)))
2080 (aver (accumulator-p dst))
2081 (maybe-emit-operand-size-prefix segment size)
2082 (maybe-emit-rex-for-ea segment src nil)
2083 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2084 (emit-ea segment src #b110))))
2086 (define-instruction idiv (segment dst src)
2087 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
2088 (:printer rex-accum-reg/mem ((op '(#b1111011 #b111))))
2090 (let ((size (matching-operand-size dst src)))
2091 (aver (accumulator-p dst))
2092 (maybe-emit-operand-size-prefix segment size)
2093 (maybe-emit-rex-for-ea segment src nil)
2094 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2095 (emit-ea segment src #b111))))
2097 (define-instruction bswap (segment dst)
2098 (:printer ext-reg-no-width ((op #b11001)))
2100 (let ((size (operand-size dst)))
2101 (maybe-emit-rex-prefix segment size nil nil dst)
2102 (emit-byte segment #x0f)
2103 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
2105 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2106 (define-instruction cbw (segment)
2107 (:printer x66-byte ((op #b10011000)))
2109 (maybe-emit-operand-size-prefix segment :word)
2110 (emit-byte segment #b10011000)))
2112 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2113 (define-instruction cwde (segment)
2114 (:printer byte ((op #b10011000)))
2116 (maybe-emit-operand-size-prefix segment :dword)
2117 (emit-byte segment #b10011000)))
2119 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2120 (define-instruction cdqe (segment)
2121 (:printer rex-byte ((op #b10011000)))
2123 (maybe-emit-rex-prefix segment :qword nil nil nil)
2124 (emit-byte segment #b10011000)))
2126 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2127 (define-instruction cwd (segment)
2128 (:printer x66-byte ((op #b10011001)))
2130 (maybe-emit-operand-size-prefix segment :word)
2131 (emit-byte segment #b10011001)))
2133 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2134 (define-instruction cdq (segment)
2135 (:printer byte ((op #b10011001)))
2137 (maybe-emit-operand-size-prefix segment :dword)
2138 (emit-byte segment #b10011001)))
2140 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2141 (define-instruction cqo (segment)
2142 (:printer rex-byte ((op #b10011001)))
2144 (maybe-emit-rex-prefix segment :qword nil nil nil)
2145 (emit-byte segment #b10011001)))
2147 (define-instruction xadd (segment dst src)
2148 ;; Register/Memory with Register.
2149 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
2151 (aver (register-p src))
2152 (let ((size (matching-operand-size src dst)))
2153 (maybe-emit-operand-size-prefix segment size)
2154 (maybe-emit-rex-for-ea segment dst src)
2155 (emit-byte segment #b00001111)
2156 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2157 (emit-ea segment dst (reg-tn-encoding src)))))
2162 (defun emit-shift-inst (segment dst amount opcode)
2163 (let ((size (operand-size dst)))
2164 (maybe-emit-operand-size-prefix segment size)
2165 (multiple-value-bind (major-opcode immed)
2167 (:cl (values #b11010010 nil))
2168 (1 (values #b11010000 nil))
2169 (t (values #b11000000 t)))
2170 (maybe-emit-rex-for-ea segment dst nil)
2172 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2173 (emit-ea segment dst opcode)
2175 (emit-byte segment amount)))))
2177 (eval-when (:compile-toplevel :execute)
2178 (defun shift-inst-printer-list (subop)
2179 `((reg/mem ((op (#b1101000 ,subop)))
2180 (:name :tab reg/mem ", 1"))
2181 (rex-reg/mem ((op (#b1101000 ,subop)))
2182 (:name :tab reg/mem ", 1"))
2183 (reg/mem ((op (#b1101001 ,subop)))
2184 (:name :tab reg/mem ", " 'cl))
2185 (rex-reg/mem ((op (#b1101001 ,subop)))
2186 (:name :tab reg/mem ", " 'cl))
2187 (reg/mem-imm ((op (#b1100000 ,subop))
2188 (imm nil :type imm-byte)))
2189 (rex-reg/mem-imm ((op (#b1100000 ,subop))
2190 (imm nil :type imm-byte))))))
2192 (define-instruction rol (segment dst amount)
2194 (shift-inst-printer-list #b000))
2196 (emit-shift-inst segment dst amount #b000)))
2198 (define-instruction ror (segment dst amount)
2200 (shift-inst-printer-list #b001))
2202 (emit-shift-inst segment dst amount #b001)))
2204 (define-instruction rcl (segment dst amount)
2206 (shift-inst-printer-list #b010))
2208 (emit-shift-inst segment dst amount #b010)))
2210 (define-instruction rcr (segment dst amount)
2212 (shift-inst-printer-list #b011))
2214 (emit-shift-inst segment dst amount #b011)))
2216 (define-instruction shl (segment dst amount)
2218 (shift-inst-printer-list #b100))
2220 (emit-shift-inst segment dst amount #b100)))
2222 (define-instruction shr (segment dst amount)
2224 (shift-inst-printer-list #b101))
2226 (emit-shift-inst segment dst amount #b101)))
2228 (define-instruction sar (segment dst amount)
2230 (shift-inst-printer-list #b111))
2232 (emit-shift-inst segment dst amount #b111)))
2234 (defun emit-double-shift (segment opcode dst src amt)
2235 (let ((size (matching-operand-size dst src)))
2236 (when (eq size :byte)
2237 (error "Double shifts can only be used with words."))
2238 (maybe-emit-operand-size-prefix segment size)
2239 (maybe-emit-rex-for-ea segment dst src)
2240 (emit-byte segment #b00001111)
2241 (emit-byte segment (dpb opcode (byte 1 3)
2242 (if (eq amt :cl) #b10100101 #b10100100)))
2243 (emit-ea segment dst (reg-tn-encoding src))
2244 (unless (eq amt :cl)
2245 (emit-byte segment amt))))
2247 (eval-when (:compile-toplevel :execute)
2248 (defun double-shift-inst-printer-list (op)
2250 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
2251 (imm nil :type signed-imm-byte)))
2252 (ext-reg-reg/mem ((op ,(logior op #b101)))
2253 (:name :tab reg/mem ", " 'cl)))))
2255 (define-instruction shld (segment dst src amt)
2256 (:declare (type (or (member :cl) (mod 32)) amt))
2257 (:printer-list (double-shift-inst-printer-list #b10100000))
2259 (emit-double-shift segment #b0 dst src amt)))
2261 (define-instruction shrd (segment dst src amt)
2262 (:declare (type (or (member :cl) (mod 32)) amt))
2263 (:printer-list (double-shift-inst-printer-list #b10101000))
2265 (emit-double-shift segment #b1 dst src amt)))
2267 (define-instruction and (segment dst src)
2269 (arith-inst-printer-list #b100))
2271 (emit-random-arith-inst "AND" segment dst src #b100)))
2273 (define-instruction test (segment this that)
2274 (:printer accum-imm ((op #b1010100)))
2275 (:printer rex-accum-imm ((op #b1010100)))
2276 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2277 (:printer rex-reg/mem-imm ((op '(#b1111011 #b000))))
2278 (:printer reg-reg/mem ((op #b1000010)))
2279 (:printer rex-reg-reg/mem ((op #b1000010)))
2281 (let ((size (matching-operand-size this that)))
2282 (maybe-emit-operand-size-prefix segment size)
2283 (flet ((test-immed-and-something (immed something)
2284 (cond ((accumulator-p something)
2285 (maybe-emit-rex-for-ea segment something nil)
2287 (if (eq size :byte) #b10101000 #b10101001))
2288 (emit-sized-immediate segment size immed))
2290 (maybe-emit-rex-for-ea segment something nil)
2292 (if (eq size :byte) #b11110110 #b11110111))
2293 (emit-ea segment something #b000)
2294 (emit-sized-immediate segment size immed))))
2295 (test-reg-and-something (reg something)
2296 (maybe-emit-rex-for-ea segment something reg)
2297 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2298 (emit-ea segment something (reg-tn-encoding reg))))
2299 (cond ((integerp that)
2300 (test-immed-and-something that this))
2302 (test-immed-and-something this that))
2304 (test-reg-and-something this that))
2306 (test-reg-and-something that this))
2308 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2310 (define-instruction or (segment dst src)
2312 (arith-inst-printer-list #b001))
2314 (emit-random-arith-inst "OR" segment dst src #b001)))
2316 (define-instruction xor (segment dst src)
2318 (arith-inst-printer-list #b110))
2320 (emit-random-arith-inst "XOR" segment dst src #b110)))
2322 (define-instruction not (segment dst)
2323 (:printer reg/mem ((op '(#b1111011 #b010))))
2324 (:printer rex-reg/mem ((op '(#b1111011 #b010))))
2326 (let ((size (operand-size dst)))
2327 (maybe-emit-operand-size-prefix segment size)
2328 (maybe-emit-rex-for-ea segment dst nil)
2329 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2330 (emit-ea segment dst #b010))))
2332 ;;;; string manipulation
2334 (define-instruction cmps (segment size)
2335 (:printer string-op ((op #b1010011)))
2336 (:printer rex-string-op ((op #b1010011)))
2338 (maybe-emit-operand-size-prefix segment size)
2339 (maybe-emit-rex-prefix segment size nil nil nil)
2340 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2342 (define-instruction ins (segment acc)
2343 (:printer string-op ((op #b0110110)))
2344 (:printer rex-string-op ((op #b0110110)))
2346 (let ((size (operand-size acc)))
2347 (aver (accumulator-p acc))
2348 (maybe-emit-operand-size-prefix segment size)
2349 (maybe-emit-rex-prefix segment size nil nil nil)
2350 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2352 (define-instruction lods (segment acc)
2353 (:printer string-op ((op #b1010110)))
2354 (:printer rex-string-op ((op #b1010110)))
2356 (let ((size (operand-size acc)))
2357 (aver (accumulator-p acc))
2358 (maybe-emit-operand-size-prefix segment size)
2359 (maybe-emit-rex-prefix segment size nil nil nil)
2360 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2362 (define-instruction movs (segment size)
2363 (:printer string-op ((op #b1010010)))
2364 (:printer rex-string-op ((op #b1010010)))
2366 (maybe-emit-operand-size-prefix segment size)
2367 (maybe-emit-rex-prefix segment size nil nil nil)
2368 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2370 (define-instruction outs (segment acc)
2371 (:printer string-op ((op #b0110111)))
2372 (:printer rex-string-op ((op #b0110111)))
2374 (let ((size (operand-size acc)))
2375 (aver (accumulator-p acc))
2376 (maybe-emit-operand-size-prefix segment size)
2377 (maybe-emit-rex-prefix segment size nil nil nil)
2378 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2380 (define-instruction scas (segment acc)
2381 (:printer string-op ((op #b1010111)))
2382 (:printer rex-string-op ((op #b1010111)))
2384 (let ((size (operand-size acc)))
2385 (aver (accumulator-p acc))
2386 (maybe-emit-operand-size-prefix segment size)
2387 (maybe-emit-rex-prefix segment size nil nil nil)
2388 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2390 (define-instruction stos (segment acc)
2391 (:printer string-op ((op #b1010101)))
2392 (:printer rex-string-op ((op #b1010101)))
2394 (let ((size (operand-size acc)))
2395 (aver (accumulator-p acc))
2396 (maybe-emit-operand-size-prefix segment size)
2397 (maybe-emit-rex-prefix segment size nil nil nil)
2398 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2400 (define-instruction xlat (segment)
2401 (:printer byte ((op #b11010111)))
2403 (emit-byte segment #b11010111)))
2405 (define-instruction rep (segment)
2407 (emit-byte segment #b11110010)))
2409 (define-instruction repe (segment)
2410 (:printer byte ((op #b11110011)))
2412 (emit-byte segment #b11110011)))
2414 (define-instruction repne (segment)
2415 (:printer byte ((op #b11110010)))
2417 (emit-byte segment #b11110010)))
2420 ;;;; bit manipulation
2422 (define-instruction bsf (segment dst src)
2423 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2424 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111100)))
2426 (let ((size (matching-operand-size dst src)))
2427 (when (eq size :byte)
2428 (error "can't scan bytes: ~S" src))
2429 (maybe-emit-operand-size-prefix segment size)
2430 (maybe-emit-rex-for-ea segment src dst)
2431 (emit-byte segment #b00001111)
2432 (emit-byte segment #b10111100)
2433 (emit-ea segment src (reg-tn-encoding dst)))))
2435 (define-instruction bsr (segment dst src)
2436 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2437 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111101)))
2439 (let ((size (matching-operand-size dst src)))
2440 (when (eq size :byte)
2441 (error "can't scan bytes: ~S" src))
2442 (maybe-emit-operand-size-prefix segment size)
2443 (maybe-emit-rex-for-ea segment src dst)
2444 (emit-byte segment #b00001111)
2445 (emit-byte segment #b10111101)
2446 (emit-ea segment src (reg-tn-encoding dst)))))
2448 (defun emit-bit-test-and-mumble (segment src index opcode)
2449 (let ((size (operand-size src)))
2450 (when (eq size :byte)
2451 (error "can't scan bytes: ~S" src))
2452 (maybe-emit-operand-size-prefix segment size)
2453 (cond ((integerp index)
2454 (maybe-emit-rex-for-ea segment src nil)
2455 (emit-byte segment #b00001111)
2456 (emit-byte segment #b10111010)
2457 (emit-ea segment src opcode)
2458 (emit-byte segment index))
2460 (maybe-emit-rex-for-ea segment src index)
2461 (emit-byte segment #b00001111)
2462 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2463 (emit-ea segment src (reg-tn-encoding index))))))
2465 (eval-when (:compile-toplevel :execute)
2466 (defun bit-test-inst-printer-list (subop)
2467 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2468 (reg/mem nil :type reg/mem)
2469 (imm nil :type imm-byte)
2471 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2473 (:name :tab reg/mem ", " reg)))))
2475 (define-instruction bt (segment src index)
2476 (:printer-list (bit-test-inst-printer-list #b100))
2478 (emit-bit-test-and-mumble segment src index #b100)))
2480 (define-instruction btc (segment src index)
2481 (:printer-list (bit-test-inst-printer-list #b111))
2483 (emit-bit-test-and-mumble segment src index #b111)))
2485 (define-instruction btr (segment src index)
2486 (:printer-list (bit-test-inst-printer-list #b110))
2488 (emit-bit-test-and-mumble segment src index #b110)))
2490 (define-instruction bts (segment src index)
2491 (:printer-list (bit-test-inst-printer-list #b101))
2493 (emit-bit-test-and-mumble segment src index #b101)))
2496 ;;;; control transfer
2498 (define-instruction call (segment where)
2499 (:printer near-jump ((op #b11101000)))
2500 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2501 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b010))))
2505 (emit-byte segment #b11101000) ; 32 bit relative
2506 (emit-back-patch segment
2508 (lambda (segment posn)
2510 (- (label-position where)
2513 (emit-byte segment #b11101000)
2514 (emit-relative-fixup segment where))
2516 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2517 (emit-byte segment #b11111111)
2518 (emit-ea segment where #b010)))))
2520 (defun emit-byte-displacement-backpatch (segment target)
2521 (emit-back-patch segment
2523 (lambda (segment posn)
2524 (let ((disp (- (label-position target) (1+ posn))))
2525 (aver (<= -128 disp 127))
2526 (emit-byte segment disp)))))
2528 (define-instruction jmp (segment cond &optional where)
2529 ;; conditional jumps
2530 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2531 (:printer near-cond-jump () '('j cc :tab label))
2532 ;; unconditional jumps
2533 (:printer short-jump ((op #b1011)))
2534 (:printer near-jump ((op #b11101001)) )
2535 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2536 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b100))))
2541 (lambda (segment posn delta-if-after)
2542 (let ((disp (- (label-position where posn delta-if-after)
2544 (when (<= -128 disp 127)
2546 (dpb (conditional-opcode cond)
2549 (emit-byte-displacement-backpatch segment where)
2551 (lambda (segment posn)
2552 (let ((disp (- (label-position where) (+ posn 6))))
2553 (emit-byte segment #b00001111)
2555 (dpb (conditional-opcode cond)
2558 (emit-dword segment disp)))))
2559 ((label-p (setq where cond))
2562 (lambda (segment posn delta-if-after)
2563 (let ((disp (- (label-position where posn delta-if-after)
2565 (when (<= -128 disp 127)
2566 (emit-byte segment #b11101011)
2567 (emit-byte-displacement-backpatch segment where)
2569 (lambda (segment posn)
2570 (let ((disp (- (label-position where) (+ posn 5))))
2571 (emit-byte segment #b11101001)
2572 (emit-dword segment disp)))))
2574 (emit-byte segment #b11101001)
2575 (emit-relative-fixup segment where))
2577 (unless (or (ea-p where) (tn-p where))
2578 (error "don't know what to do with ~A" where))
2579 ;; near jump defaults to 64 bit
2580 ;; w-bit in rex prefix is unnecessary
2581 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2582 (emit-byte segment #b11111111)
2583 (emit-ea segment where #b100)))))
2585 (define-instruction jmp-short (segment label)
2587 (emit-byte segment #b11101011)
2588 (emit-byte-displacement-backpatch segment label)))
2590 (define-instruction ret (segment &optional stack-delta)
2591 (:printer byte ((op #b11000011)))
2592 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2596 (emit-byte segment #b11000010)
2597 (emit-word segment stack-delta))
2599 (emit-byte segment #b11000011)))))
2601 (define-instruction jecxz (segment target)
2602 (:printer short-jump ((op #b0011)))
2604 (emit-byte segment #b11100011)
2605 (emit-byte-displacement-backpatch segment target)))
2607 (define-instruction loop (segment target)
2608 (:printer short-jump ((op #b0010)))
2610 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2611 (emit-byte-displacement-backpatch segment target)))
2613 (define-instruction loopz (segment target)
2614 (:printer short-jump ((op #b0001)))
2616 (emit-byte segment #b11100001)
2617 (emit-byte-displacement-backpatch segment target)))
2619 (define-instruction loopnz (segment target)
2620 (:printer short-jump ((op #b0000)))
2622 (emit-byte segment #b11100000)
2623 (emit-byte-displacement-backpatch segment target)))
2625 ;;;; conditional move
2626 (define-instruction cmov (segment cond dst src)
2627 (:printer cond-move ())
2628 (:printer rex-cond-move ())
2630 (aver (register-p dst))
2631 (let ((size (matching-operand-size dst src)))
2632 (aver (or (eq size :word) (eq size :dword) (eq size :qword) ))
2633 (maybe-emit-operand-size-prefix segment size))
2634 (maybe-emit-rex-for-ea segment src dst)
2635 (emit-byte segment #b00001111)
2636 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2637 (emit-ea segment src (reg-tn-encoding dst))))
2639 ;;;; conditional byte set
2641 (define-instruction set (segment dst cond)
2642 (:printer cond-set ())
2644 (maybe-emit-rex-for-ea segment dst nil)
2645 (emit-byte segment #b00001111)
2646 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2647 (emit-ea segment dst #b000)))
2651 (define-instruction enter (segment disp &optional (level 0))
2652 (:declare (type (unsigned-byte 16) disp)
2653 (type (unsigned-byte 8) level))
2654 (:printer enter-format ((op #b11001000)))
2656 (emit-byte segment #b11001000)
2657 (emit-word segment disp)
2658 (emit-byte segment level)))
2660 (define-instruction leave (segment)
2661 (:printer byte ((op #b11001001)))
2663 (emit-byte segment #b11001001)))
2665 ;;;; interrupt instructions
2667 (defun snarf-error-junk (sap offset &optional length-only)
2668 (let* ((length (sb!sys:sap-ref-8 sap offset))
2669 (vector (make-array length :element-type '(unsigned-byte 8))))
2670 (declare (type sb!sys:system-area-pointer sap)
2671 (type (unsigned-byte 8) length)
2672 (type (simple-array (unsigned-byte 8) (*)) vector))
2674 (values 0 (1+ length) nil nil))
2676 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2678 (collect ((sc-offsets)
2680 (lengths 1) ; the length byte
2682 (error-number (sb!c:read-var-integer vector index)))
2685 (when (>= index length)
2687 (let ((old-index index))
2688 (sc-offsets (sb!c:read-var-integer vector index))
2689 (lengths (- index old-index))))
2690 (values error-number
2696 (defmacro break-cases (breaknum &body cases)
2697 (let ((bn-temp (gensym)))
2698 (collect ((clauses))
2699 (dolist (case cases)
2700 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2701 `(let ((,bn-temp ,breaknum))
2702 (cond ,@(clauses))))))
2705 (defun break-control (chunk inst stream dstate)
2706 (declare (ignore inst))
2707 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2708 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2709 ;; map has it undefined; and it should be easier to look in the target
2710 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2711 ;; from first principles whether it's defined in some way that genesis
2713 (case (byte-imm-code chunk dstate)
2716 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2719 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2721 (nt "breakpoint trap"))
2722 (#.pending-interrupt-trap
2723 (nt "pending interrupt trap"))
2726 (#.fun-end-breakpoint-trap
2727 (nt "function end breakpoint trap")))))
2729 (define-instruction break (segment code)
2730 (:declare (type (unsigned-byte 8) code))
2731 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2732 :control #'break-control)
2734 (emit-byte segment #b11001100)
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 into (segment)
2749 (:printer byte ((op #b11001110)))
2751 (emit-byte segment #b11001110)))
2753 (define-instruction bound (segment reg bounds)
2755 (let ((size (matching-operand-size reg bounds)))
2756 (when (eq size :byte)
2757 (error "can't bounds-test bytes: ~S" reg))
2758 (maybe-emit-operand-size-prefix segment size)
2759 (maybe-emit-rex-for-ea segment bounds reg)
2760 (emit-byte segment #b01100010)
2761 (emit-ea segment bounds (reg-tn-encoding reg)))))
2763 (define-instruction iret (segment)
2764 (:printer byte ((op #b11001111)))
2766 (emit-byte segment #b11001111)))
2768 ;;;; processor control
2770 (define-instruction hlt (segment)
2771 (:printer byte ((op #b11110100)))
2773 (emit-byte segment #b11110100)))
2775 (define-instruction nop (segment)
2776 (:printer byte ((op #b10010000)))
2778 (emit-byte segment #b10010000)))
2780 (define-instruction wait (segment)
2781 (:printer byte ((op #b10011011)))
2783 (emit-byte segment #b10011011)))
2785 (define-instruction lock (segment)
2786 (:printer byte ((op #b11110000)))
2788 (emit-byte segment #b11110000)))
2790 ;;;; miscellaneous hackery
2792 (define-instruction byte (segment byte)
2794 (emit-byte segment byte)))
2796 (define-instruction word (segment word)
2798 (emit-word segment word)))
2800 (define-instruction dword (segment dword)
2802 (emit-dword segment dword)))
2804 (defun emit-header-data (segment type)
2805 (emit-back-patch segment
2807 (lambda (segment posn)
2811 (component-header-length))
2815 (define-instruction simple-fun-header-word (segment)
2817 (emit-header-data segment simple-fun-header-widetag)))
2819 (define-instruction lra-header-word (segment)
2821 (emit-header-data segment return-pc-header-widetag)))
2823 ;;;; fp instructions
2825 ;;;; Note: We treat the single-precision and double-precision variants
2826 ;;;; as separate instructions.
2828 ;;; Load single to st(0).
2829 (define-instruction fld (segment source)
2830 (:printer floating-point ((op '(#b001 #b000))))
2832 (and (not (fp-reg-tn-p source))
2833 (maybe-emit-rex-for-ea segment source nil))
2834 (emit-byte segment #b11011001)
2835 (emit-fp-op segment source #b000)))
2837 ;;; Load double to st(0).
2838 (define-instruction fldd (segment source)
2839 (:printer floating-point ((op '(#b101 #b000))))
2840 (:printer floating-point-fp ((op '(#b001 #b000))))
2842 (if (fp-reg-tn-p source)
2843 (emit-byte segment #b11011001)
2845 (maybe-emit-rex-for-ea segment source nil)
2846 (emit-byte segment #b11011101)))
2847 (emit-fp-op segment source #b000)))
2849 ;;; Load long to st(0).
2850 (define-instruction fldl (segment source)
2851 (:printer floating-point ((op '(#b011 #b101))))
2853 (and (not (fp-reg-tn-p source))
2854 (maybe-emit-rex-for-ea segment source nil))
2855 (emit-byte segment #b11011011)
2856 (emit-fp-op segment source #b101)))
2858 ;;; Store single from st(0).
2859 (define-instruction fst (segment dest)
2860 (:printer floating-point ((op '(#b001 #b010))))
2862 (cond ((fp-reg-tn-p dest)
2863 (emit-byte segment #b11011101)
2864 (emit-fp-op segment dest #b010))
2866 (maybe-emit-rex-for-ea segment dest nil)
2867 (emit-byte segment #b11011001)
2868 (emit-fp-op segment dest #b010)))))
2870 ;;; Store double from st(0).
2871 (define-instruction fstd (segment dest)
2872 (:printer floating-point ((op '(#b101 #b010))))
2873 (:printer floating-point-fp ((op '(#b101 #b010))))
2875 (cond ((fp-reg-tn-p dest)
2876 (emit-byte segment #b11011101)
2877 (emit-fp-op segment dest #b010))
2879 (maybe-emit-rex-for-ea segment dest nil)
2880 (emit-byte segment #b11011101)
2881 (emit-fp-op segment dest #b010)))))
2883 ;;; Arithmetic ops are all done with at least one operand at top of
2884 ;;; stack. The other operand is is another register or a 32/64 bit
2887 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2888 ;;; that these conflict with the Gdb conventions for binops. To reduce
2889 ;;; the confusion I've added comments showing the mathamatical
2890 ;;; operation and the two syntaxes. By the ASM386 convention the
2891 ;;; instruction syntax is:
2894 ;;; or Fop Destination, Source
2896 ;;; If only one operand is given then it is the source and the
2897 ;;; destination is ST(0). There are reversed forms of the fsub and
2898 ;;; fdiv instructions inducated by an 'R' suffix.
2900 ;;; The mathematical operation for the non-reverse form is always:
2901 ;;; destination = destination op source
2903 ;;; For the reversed form it is:
2904 ;;; destination = source op destination
2906 ;;; The instructions below only accept one operand at present which is
2907 ;;; usually the source. I've hack in extra instructions to implement
2908 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2909 ;;; the operand is the destination with the source being ST(0).
2912 ;;; st(0) = st(0) + memory or st(i).
2913 (define-instruction fadd (segment source)
2914 (:printer floating-point ((op '(#b000 #b000))))
2916 (and (not (fp-reg-tn-p source))
2917 (maybe-emit-rex-for-ea segment source nil))
2918 (emit-byte segment #b11011000)
2919 (emit-fp-op segment source #b000)))
2922 ;;; st(0) = st(0) + memory or st(i).
2923 (define-instruction faddd (segment source)
2924 (:printer floating-point ((op '(#b100 #b000))))
2925 (:printer floating-point-fp ((op '(#b000 #b000))))
2927 (and (not (fp-reg-tn-p source))
2928 (maybe-emit-rex-for-ea segment source nil))
2929 (if (fp-reg-tn-p source)
2930 (emit-byte segment #b11011000)
2931 (emit-byte segment #b11011100))
2932 (emit-fp-op segment source #b000)))
2934 ;;; Add double destination st(i):
2935 ;;; st(i) = st(0) + st(i).
2936 (define-instruction fadd-sti (segment destination)
2937 (:printer floating-point-fp ((op '(#b100 #b000))))
2939 (aver (fp-reg-tn-p destination))
2940 (emit-byte segment #b11011100)
2941 (emit-fp-op segment destination #b000)))
2943 (define-instruction faddp-sti (segment destination)
2944 (:printer floating-point-fp ((op '(#b110 #b000))))
2946 (aver (fp-reg-tn-p destination))
2947 (emit-byte segment #b11011110)
2948 (emit-fp-op segment destination #b000)))
2950 ;;; Subtract single:
2951 ;;; st(0) = st(0) - memory or st(i).
2952 (define-instruction fsub (segment source)
2953 (:printer floating-point ((op '(#b000 #b100))))
2955 (and (not (fp-reg-tn-p source))
2956 (maybe-emit-rex-for-ea segment source nil))
2957 (emit-byte segment #b11011000)
2958 (emit-fp-op segment source #b100)))
2960 ;;; Subtract single, reverse:
2961 ;;; st(0) = memory or st(i) - st(0).
2962 (define-instruction fsubr (segment source)
2963 (:printer floating-point ((op '(#b000 #b101))))
2965 (and (not (fp-reg-tn-p source))
2966 (maybe-emit-rex-for-ea segment source nil))
2967 (emit-byte segment #b11011000)
2968 (emit-fp-op segment source #b101)))
2970 ;;; Subtract double:
2971 ;;; st(0) = st(0) - memory or st(i).
2972 (define-instruction fsubd (segment source)
2973 (:printer floating-point ((op '(#b100 #b100))))
2974 (:printer floating-point-fp ((op '(#b000 #b100))))
2976 (if (fp-reg-tn-p source)
2977 (emit-byte segment #b11011000)
2979 (and (not (fp-reg-tn-p source))
2980 (maybe-emit-rex-for-ea segment source nil))
2981 (emit-byte segment #b11011100)))
2982 (emit-fp-op segment source #b100)))
2984 ;;; Subtract double, reverse:
2985 ;;; st(0) = memory or st(i) - st(0).
2986 (define-instruction fsubrd (segment source)
2987 (:printer floating-point ((op '(#b100 #b101))))
2988 (:printer floating-point-fp ((op '(#b000 #b101))))
2990 (if (fp-reg-tn-p source)
2991 (emit-byte segment #b11011000)
2993 (and (not (fp-reg-tn-p source))
2994 (maybe-emit-rex-for-ea segment source nil))
2995 (emit-byte segment #b11011100)))
2996 (emit-fp-op segment source #b101)))
2998 ;;; Subtract double, destination st(i):
2999 ;;; st(i) = st(i) - st(0).
3001 ;;; ASM386 syntax: FSUB ST(i), ST
3002 ;;; Gdb syntax: fsubr %st,%st(i)
3003 (define-instruction fsub-sti (segment destination)
3004 (:printer floating-point-fp ((op '(#b100 #b101))))
3006 (aver (fp-reg-tn-p destination))
3007 (emit-byte segment #b11011100)
3008 (emit-fp-op segment destination #b101)))
3010 (define-instruction fsubp-sti (segment destination)
3011 (:printer floating-point-fp ((op '(#b110 #b101))))
3013 (aver (fp-reg-tn-p destination))
3014 (emit-byte segment #b11011110)
3015 (emit-fp-op segment destination #b101)))
3017 ;;; Subtract double, reverse, destination st(i):
3018 ;;; st(i) = st(0) - st(i).
3020 ;;; ASM386 syntax: FSUBR ST(i), ST
3021 ;;; Gdb syntax: fsub %st,%st(i)
3022 (define-instruction fsubr-sti (segment destination)
3023 (:printer floating-point-fp ((op '(#b100 #b100))))
3025 (aver (fp-reg-tn-p destination))
3026 (emit-byte segment #b11011100)
3027 (emit-fp-op segment destination #b100)))
3029 (define-instruction fsubrp-sti (segment destination)
3030 (:printer floating-point-fp ((op '(#b110 #b100))))
3032 (aver (fp-reg-tn-p destination))
3033 (emit-byte segment #b11011110)
3034 (emit-fp-op segment destination #b100)))
3036 ;;; Multiply single:
3037 ;;; st(0) = st(0) * memory or st(i).
3038 (define-instruction fmul (segment source)
3039 (:printer floating-point ((op '(#b000 #b001))))
3041 (and (not (fp-reg-tn-p source))
3042 (maybe-emit-rex-for-ea segment source nil))
3043 (emit-byte segment #b11011000)
3044 (emit-fp-op segment source #b001)))
3046 ;;; Multiply double:
3047 ;;; st(0) = st(0) * memory or st(i).
3048 (define-instruction fmuld (segment source)
3049 (:printer floating-point ((op '(#b100 #b001))))
3050 (:printer floating-point-fp ((op '(#b000 #b001))))
3052 (if (fp-reg-tn-p source)
3053 (emit-byte segment #b11011000)
3055 (and (not (fp-reg-tn-p source))
3056 (maybe-emit-rex-for-ea segment source nil))
3057 (emit-byte segment #b11011100)))
3058 (emit-fp-op segment source #b001)))
3060 ;;; Multiply double, destination st(i):
3061 ;;; st(i) = st(i) * st(0).
3062 (define-instruction fmul-sti (segment destination)
3063 (:printer floating-point-fp ((op '(#b100 #b001))))
3065 (aver (fp-reg-tn-p destination))
3066 (emit-byte segment #b11011100)
3067 (emit-fp-op segment destination #b001)))
3070 ;;; st(0) = st(0) / memory or st(i).
3071 (define-instruction fdiv (segment source)
3072 (:printer floating-point ((op '(#b000 #b110))))
3074 (and (not (fp-reg-tn-p source))
3075 (maybe-emit-rex-for-ea segment source nil))
3076 (emit-byte segment #b11011000)
3077 (emit-fp-op segment source #b110)))
3079 ;;; Divide single, reverse:
3080 ;;; st(0) = memory or st(i) / st(0).
3081 (define-instruction fdivr (segment source)
3082 (:printer floating-point ((op '(#b000 #b111))))
3084 (and (not (fp-reg-tn-p source))
3085 (maybe-emit-rex-for-ea segment source nil))
3086 (emit-byte segment #b11011000)
3087 (emit-fp-op segment source #b111)))
3090 ;;; st(0) = st(0) / memory or st(i).
3091 (define-instruction fdivd (segment source)
3092 (:printer floating-point ((op '(#b100 #b110))))
3093 (:printer floating-point-fp ((op '(#b000 #b110))))
3095 (if (fp-reg-tn-p source)
3096 (emit-byte segment #b11011000)
3098 (and (not (fp-reg-tn-p source))
3099 (maybe-emit-rex-for-ea segment source nil))
3100 (emit-byte segment #b11011100)))
3101 (emit-fp-op segment source #b110)))
3103 ;;; Divide double, reverse:
3104 ;;; st(0) = memory or st(i) / st(0).
3105 (define-instruction fdivrd (segment source)
3106 (:printer floating-point ((op '(#b100 #b111))))
3107 (:printer floating-point-fp ((op '(#b000 #b111))))
3109 (if (fp-reg-tn-p source)
3110 (emit-byte segment #b11011000)
3112 (and (not (fp-reg-tn-p source))
3113 (maybe-emit-rex-for-ea segment source nil))
3114 (emit-byte segment #b11011100)))
3115 (emit-fp-op segment source #b111)))
3117 ;;; Divide double, destination st(i):
3118 ;;; st(i) = st(i) / st(0).
3120 ;;; ASM386 syntax: FDIV ST(i), ST
3121 ;;; Gdb syntax: fdivr %st,%st(i)
3122 (define-instruction fdiv-sti (segment destination)
3123 (:printer floating-point-fp ((op '(#b100 #b111))))
3125 (aver (fp-reg-tn-p destination))
3126 (emit-byte segment #b11011100)
3127 (emit-fp-op segment destination #b111)))
3129 ;;; Divide double, reverse, destination st(i):
3130 ;;; st(i) = st(0) / st(i).
3132 ;;; ASM386 syntax: FDIVR ST(i), ST
3133 ;;; Gdb syntax: fdiv %st,%st(i)
3134 (define-instruction fdivr-sti (segment destination)
3135 (:printer floating-point-fp ((op '(#b100 #b110))))
3137 (aver (fp-reg-tn-p destination))
3138 (emit-byte segment #b11011100)
3139 (emit-fp-op segment destination #b110)))
3141 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
3142 (define-instruction fxch (segment source)
3143 (:printer floating-point-fp ((op '(#b001 #b001))))
3145 (unless (and (tn-p source)
3146 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
3148 (emit-byte segment #b11011001)
3149 (emit-fp-op segment source #b001)))
3151 ;;; Push 32-bit integer to st0.
3152 (define-instruction fild (segment source)
3153 (:printer floating-point ((op '(#b011 #b000))))
3155 (and (not (fp-reg-tn-p source))
3156 (maybe-emit-rex-for-ea segment source nil))
3157 (emit-byte segment #b11011011)
3158 (emit-fp-op segment source #b000)))
3160 ;;; Push 64-bit integer to st0.
3161 (define-instruction fildl (segment source)
3162 (:printer floating-point ((op '(#b111 #b101))))
3164 (and (not (fp-reg-tn-p source))
3165 (maybe-emit-rex-for-ea segment source nil))
3166 (emit-byte segment #b11011111)
3167 (emit-fp-op segment source #b101)))
3169 ;;; Store 32-bit integer.
3170 (define-instruction fist (segment dest)
3171 (:printer floating-point ((op '(#b011 #b010))))
3173 (and (not (fp-reg-tn-p dest))
3174 (maybe-emit-rex-for-ea segment dest nil))
3175 (emit-byte segment #b11011011)
3176 (emit-fp-op segment dest #b010)))
3178 ;;; Store and pop 32-bit integer.
3179 (define-instruction fistp (segment dest)
3180 (:printer floating-point ((op '(#b011 #b011))))
3182 (and (not (fp-reg-tn-p dest))
3183 (maybe-emit-rex-for-ea segment dest nil))
3184 (emit-byte segment #b11011011)
3185 (emit-fp-op segment dest #b011)))
3187 ;;; Store and pop 64-bit integer.
3188 (define-instruction fistpl (segment dest)
3189 (:printer floating-point ((op '(#b111 #b111))))
3191 (and (not (fp-reg-tn-p dest))
3192 (maybe-emit-rex-for-ea segment dest nil))
3193 (emit-byte segment #b11011111)
3194 (emit-fp-op segment dest #b111)))
3196 ;;; Store single from st(0) and pop.
3197 (define-instruction fstp (segment dest)
3198 (:printer floating-point ((op '(#b001 #b011))))
3200 (cond ((fp-reg-tn-p dest)
3201 (emit-byte segment #b11011101)
3202 (emit-fp-op segment dest #b011))
3204 (maybe-emit-rex-for-ea segment dest nil)
3205 (emit-byte segment #b11011001)
3206 (emit-fp-op segment dest #b011)))))
3208 ;;; Store double from st(0) and pop.
3209 (define-instruction fstpd (segment dest)
3210 (:printer floating-point ((op '(#b101 #b011))))
3211 (:printer floating-point-fp ((op '(#b101 #b011))))
3213 (cond ((fp-reg-tn-p dest)
3214 (emit-byte segment #b11011101)
3215 (emit-fp-op segment dest #b011))
3217 (maybe-emit-rex-for-ea segment dest nil)
3218 (emit-byte segment #b11011101)
3219 (emit-fp-op segment dest #b011)))))
3221 ;;; Store long from st(0) and pop.
3222 (define-instruction fstpl (segment dest)
3223 (:printer floating-point ((op '(#b011 #b111))))
3225 (and (not (fp-reg-tn-p dest))
3226 (maybe-emit-rex-for-ea segment dest nil))
3227 (emit-byte segment #b11011011)
3228 (emit-fp-op segment dest #b111)))
3230 ;;; Decrement stack-top pointer.
3231 (define-instruction fdecstp (segment)
3232 (:printer floating-point-no ((op #b10110)))
3234 (emit-byte segment #b11011001)
3235 (emit-byte segment #b11110110)))
3237 ;;; Increment stack-top pointer.
3238 (define-instruction fincstp (segment)
3239 (:printer floating-point-no ((op #b10111)))
3241 (emit-byte segment #b11011001)
3242 (emit-byte segment #b11110111)))
3244 ;;; Free fp register.
3245 (define-instruction ffree (segment dest)
3246 (:printer floating-point-fp ((op '(#b101 #b000))))
3248 (and (not (fp-reg-tn-p dest))
3249 (maybe-emit-rex-for-ea segment dest nil))
3250 (emit-byte segment #b11011101)
3251 (emit-fp-op segment dest #b000)))
3253 (define-instruction fabs (segment)
3254 (:printer floating-point-no ((op #b00001)))
3256 (emit-byte segment #b11011001)
3257 (emit-byte segment #b11100001)))
3259 (define-instruction fchs (segment)
3260 (:printer floating-point-no ((op #b00000)))
3262 (emit-byte segment #b11011001)
3263 (emit-byte segment #b11100000)))
3265 (define-instruction frndint(segment)
3266 (:printer floating-point-no ((op #b11100)))
3268 (emit-byte segment #b11011001)
3269 (emit-byte segment #b11111100)))
3272 (define-instruction fninit(segment)
3273 (:printer floating-point-5 ((op #b00011)))
3275 (emit-byte segment #b11011011)
3276 (emit-byte segment #b11100011)))
3278 ;;; Store Status Word to AX.
3279 (define-instruction fnstsw(segment)
3280 (:printer floating-point-st ((op #b00000)))
3282 (emit-byte segment #b11011111)
3283 (emit-byte segment #b11100000)))
3285 ;;; Load Control Word.
3287 ;;; src must be a memory location
3288 (define-instruction fldcw(segment src)
3289 (:printer floating-point ((op '(#b001 #b101))))
3291 (and (not (fp-reg-tn-p src))
3292 (maybe-emit-rex-for-ea segment src nil))
3293 (emit-byte segment #b11011001)
3294 (emit-fp-op segment src #b101)))
3296 ;;; Store Control Word.
3297 (define-instruction fnstcw(segment dst)
3298 (:printer floating-point ((op '(#b001 #b111))))
3300 (and (not (fp-reg-tn-p dst))
3301 (maybe-emit-rex-for-ea segment dst nil))
3302 (emit-byte segment #b11011001)
3303 (emit-fp-op segment dst #b111)))
3305 ;;; Store FP Environment.
3306 (define-instruction fstenv(segment dst)
3307 (:printer floating-point ((op '(#b001 #b110))))
3309 (and (not (fp-reg-tn-p dst))
3310 (maybe-emit-rex-for-ea segment dst nil))
3311 (emit-byte segment #b11011001)
3312 (emit-fp-op segment dst #b110)))
3314 ;;; Restore FP Environment.
3315 (define-instruction fldenv(segment src)
3316 (:printer floating-point ((op '(#b001 #b100))))
3318 (and (not (fp-reg-tn-p src))
3319 (maybe-emit-rex-for-ea segment src nil))
3320 (emit-byte segment #b11011001)
3321 (emit-fp-op segment src #b100)))
3324 (define-instruction fsave(segment dst)
3325 (:printer floating-point ((op '(#b101 #b110))))
3327 (and (not (fp-reg-tn-p dst))
3328 (maybe-emit-rex-for-ea segment dst nil))
3329 (emit-byte segment #b11011101)
3330 (emit-fp-op segment dst #b110)))
3332 ;;; Restore FP State.
3333 (define-instruction frstor(segment src)
3334 (:printer floating-point ((op '(#b101 #b100))))
3336 (and (not (fp-reg-tn-p src))
3337 (maybe-emit-rex-for-ea segment src nil))
3338 (emit-byte segment #b11011101)
3339 (emit-fp-op segment src #b100)))
3341 ;;; Clear exceptions.
3342 (define-instruction fnclex(segment)
3343 (:printer floating-point-5 ((op #b00010)))
3345 (emit-byte segment #b11011011)
3346 (emit-byte segment #b11100010)))
3349 (define-instruction fcom (segment src)
3350 (:printer floating-point ((op '(#b000 #b010))))
3352 (and (not (fp-reg-tn-p src))
3353 (maybe-emit-rex-for-ea segment src nil))
3354 (emit-byte segment #b11011000)
3355 (emit-fp-op segment src #b010)))
3357 (define-instruction fcomd (segment src)
3358 (:printer floating-point ((op '(#b100 #b010))))
3359 (:printer floating-point-fp ((op '(#b000 #b010))))
3361 (if (fp-reg-tn-p src)
3362 (emit-byte segment #b11011000)
3364 (maybe-emit-rex-for-ea segment src nil)
3365 (emit-byte segment #b11011100)))
3366 (emit-fp-op segment src #b010)))
3368 ;;; Compare ST1 to ST0, popping the stack twice.
3369 (define-instruction fcompp (segment)
3370 (:printer floating-point-3 ((op '(#b110 #b011001))))
3372 (emit-byte segment #b11011110)
3373 (emit-byte segment #b11011001)))
3375 ;;; unordered comparison
3376 (define-instruction fucom (segment src)
3377 (:printer floating-point-fp ((op '(#b101 #b100))))
3379 (aver (fp-reg-tn-p src))
3380 (emit-byte segment #b11011101)
3381 (emit-fp-op segment src #b100)))
3383 (define-instruction ftst (segment)
3384 (:printer floating-point-no ((op #b00100)))
3386 (emit-byte segment #b11011001)
3387 (emit-byte segment #b11100100)))
3391 (define-instruction fsqrt(segment)
3392 (:printer floating-point-no ((op #b11010)))
3394 (emit-byte segment #b11011001)
3395 (emit-byte segment #b11111010)))
3397 (define-instruction fscale(segment)
3398 (:printer floating-point-no ((op #b11101)))
3400 (emit-byte segment #b11011001)
3401 (emit-byte segment #b11111101)))
3403 (define-instruction fxtract(segment)
3404 (:printer floating-point-no ((op #b10100)))
3406 (emit-byte segment #b11011001)
3407 (emit-byte segment #b11110100)))
3409 (define-instruction fsin(segment)
3410 (:printer floating-point-no ((op #b11110)))
3412 (emit-byte segment #b11011001)
3413 (emit-byte segment #b11111110)))
3415 (define-instruction fcos(segment)
3416 (:printer floating-point-no ((op #b11111)))
3418 (emit-byte segment #b11011001)
3419 (emit-byte segment #b11111111)))
3421 (define-instruction fprem1(segment)
3422 (:printer floating-point-no ((op #b10101)))
3424 (emit-byte segment #b11011001)
3425 (emit-byte segment #b11110101)))
3427 (define-instruction fprem(segment)
3428 (:printer floating-point-no ((op #b11000)))
3430 (emit-byte segment #b11011001)
3431 (emit-byte segment #b11111000)))
3433 (define-instruction fxam (segment)
3434 (:printer floating-point-no ((op #b00101)))
3436 (emit-byte segment #b11011001)
3437 (emit-byte segment #b11100101)))
3439 ;;; These do push/pop to stack and need special handling
3440 ;;; in any VOPs that use them. See the book.
3442 ;;; st0 <- st1*log2(st0)
3443 (define-instruction fyl2x(segment) ; pops stack
3444 (:printer floating-point-no ((op #b10001)))
3446 (emit-byte segment #b11011001)
3447 (emit-byte segment #b11110001)))
3449 (define-instruction fyl2xp1(segment)
3450 (:printer floating-point-no ((op #b11001)))
3452 (emit-byte segment #b11011001)
3453 (emit-byte segment #b11111001)))
3455 (define-instruction f2xm1(segment)
3456 (:printer floating-point-no ((op #b10000)))
3458 (emit-byte segment #b11011001)
3459 (emit-byte segment #b11110000)))
3461 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
3462 (:printer floating-point-no ((op #b10010)))
3464 (emit-byte segment #b11011001)
3465 (emit-byte segment #b11110010)))
3467 (define-instruction fpatan(segment) ; POPS STACK
3468 (:printer floating-point-no ((op #b10011)))
3470 (emit-byte segment #b11011001)
3471 (emit-byte segment #b11110011)))
3473 ;;;; loading constants
3475 (define-instruction fldz(segment)
3476 (:printer floating-point-no ((op #b01110)))
3478 (emit-byte segment #b11011001)
3479 (emit-byte segment #b11101110)))
3481 (define-instruction fld1(segment)
3482 (:printer floating-point-no ((op #b01000)))
3484 (emit-byte segment #b11011001)
3485 (emit-byte segment #b11101000)))
3487 (define-instruction fldpi(segment)
3488 (:printer floating-point-no ((op #b01011)))
3490 (emit-byte segment #b11011001)
3491 (emit-byte segment #b11101011)))
3493 (define-instruction fldl2t(segment)
3494 (:printer floating-point-no ((op #b01001)))
3496 (emit-byte segment #b11011001)
3497 (emit-byte segment #b11101001)))
3499 (define-instruction fldl2e(segment)
3500 (:printer floating-point-no ((op #b01010)))
3502 (emit-byte segment #b11011001)
3503 (emit-byte segment #b11101010)))
3505 (define-instruction fldlg2(segment)
3506 (:printer floating-point-no ((op #b01100)))
3508 (emit-byte segment #b11011001)
3509 (emit-byte segment #b11101100)))
3511 (define-instruction fldln2(segment)
3512 (:printer floating-point-no ((op #b01101)))
3514 (emit-byte segment #b11011001)
3515 (emit-byte segment #b11101101)))
3517 ;;;; Instructions required to do floating point operations using SSE
3519 (defun emit-sse-inst (segment dst src prefix opcode &key operand-size)
3521 (emit-byte segment prefix))
3523 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
3524 (maybe-emit-rex-for-ea segment src dst))
3525 (emit-byte segment #x0f)
3526 (emit-byte segment opcode)
3527 (emit-ea segment src (reg-tn-encoding dst)))
3529 ;;; Emit an SSE instruction that has an XMM register as the destination
3530 ;;; operand and for which the size of the operands is implicitly given
3531 ;;; by the instruction.
3532 (defun emit-regular-sse-inst (segment dst src prefix opcode)
3533 (aver (xmm-register-p dst))
3534 (emit-sse-inst segment dst src prefix opcode
3535 :operand-size :do-not-set))
3537 ;;; Instructions having an XMM register as the destination operand
3538 ;;; and an XMM register or a memory location as the source operand.
3539 ;;; The operand size is implicitly given by the instruction.
3541 (macrolet ((define-regular-sse-inst (name prefix opcode)
3542 `(define-instruction ,name (segment dst src)
3544 `((:printer ext-xmm-xmm/mem
3545 ((prefix ,prefix) (op ,opcode)))
3546 (:printer ext-rex-xmm-xmm/mem
3547 ((prefix ,prefix) (op ,opcode))))
3548 `((:printer xmm-xmm/mem ((op ,opcode)))
3549 (:printer rex-xmm-xmm/mem ((op ,opcode)))))
3551 (emit-regular-sse-inst segment dst src ,prefix ,opcode)))))
3553 (define-regular-sse-inst andpd #x66 #x54)
3554 (define-regular-sse-inst andps nil #x54)
3555 (define-regular-sse-inst xorpd #x66 #x57)
3556 (define-regular-sse-inst xorps nil #x57)
3558 (define-regular-sse-inst comisd #x66 #x2f)
3559 (define-regular-sse-inst comiss nil #x2f)
3561 (define-regular-sse-inst addsd #xf2 #x58)
3562 (define-regular-sse-inst addss #xf3 #x58)
3563 (define-regular-sse-inst divsd #xf2 #x5e)
3564 (define-regular-sse-inst divss #xf3 #x5e)
3565 (define-regular-sse-inst mulsd #xf2 #x59)
3566 (define-regular-sse-inst mulss #xf3 #x59)
3567 (define-regular-sse-inst subsd #xf2 #x5c)
3568 (define-regular-sse-inst subss #xf3 #x5c)
3569 (define-regular-sse-inst sqrtsd #xf2 #x51)
3570 (define-regular-sse-inst sqrtss #xf3 #x51)
3572 (define-regular-sse-inst cvtsd2ss #xf2 #x5a)
3573 (define-regular-sse-inst cvtss2sd #xf3 #x5a)
3574 (define-regular-sse-inst cvtdq2pd #xf3 #xe6)
3575 (define-regular-sse-inst cvtdq2ps nil #x5b))
3578 (macrolet ((define-movsd/ss-sse-inst (name prefix)
3579 `(define-instruction ,name (segment dst src)
3580 (:printer ext-xmm-xmm/mem-dir ((prefix ,prefix)
3582 (:printer ext-rex-xmm-xmm/mem-dir ((prefix ,prefix)
3585 (cond ((xmm-register-p dst)
3586 (emit-sse-inst segment dst src ,prefix #x10
3587 :operand-size :do-not-set))
3589 (aver (xmm-register-p src))
3590 (emit-sse-inst segment src dst ,prefix #x11
3591 :operand-size :do-not-set)))))))
3592 (define-movsd/ss-sse-inst movsd #xf2)
3593 (define-movsd/ss-sse-inst movss #xf3))
3596 (define-instruction movq (segment dst src)
3597 (:printer ext-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3598 (:printer ext-rex-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3599 (:printer ext-xmm-xmm/mem ((prefix #x66) (op #xd6))
3600 '(:name :tab reg/mem ", " reg))
3601 (:printer ext-rex-xmm-xmm/mem ((prefix #x66) (op #xd6))
3602 '(:name :tab reg/mem ", " reg))
3604 (cond ((xmm-register-p dst)
3605 (emit-sse-inst segment dst src #xf3 #x7e
3606 :operand-size :do-not-set))
3608 (aver (xmm-register-p src))
3609 (emit-sse-inst segment src dst #x66 #xd6
3610 :operand-size :do-not-set)))))
3612 ;;; Instructions having an XMM register as the destination operand
3613 ;;; and a general-purpose register or a memory location as the source
3614 ;;; operand. The operand size is calculated from the source operand.
3616 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
3617 ;;; a memory location to the low order 32 or 64 bits of an XMM register
3618 ;;; with zero extension or vice versa.
3619 ;;; We do not support the MMX version of this instruction.
3620 (define-instruction movd (segment dst src)
3621 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x6e)))
3622 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x6e)))
3623 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x7e))
3624 '(:name :tab reg/mem ", " reg))
3625 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x7e))
3626 '(:name :tab reg/mem ", " reg))
3628 (cond ((xmm-register-p dst)
3629 (emit-sse-inst segment dst src #x66 #x6e))
3631 (aver (xmm-register-p src))
3632 (emit-sse-inst segment src dst #x66 #x7e)))))
3634 (macrolet ((define-integer-source-sse-inst (name prefix opcode)
3635 `(define-instruction ,name (segment dst src)
3636 (:printer ext-xmm-reg/mem ((prefix ,prefix) (op ,opcode)))
3637 (:printer ext-rex-xmm-reg/mem ((prefix ,prefix) (op ,opcode)))
3639 (aver (xmm-register-p dst))
3640 (let ((src-size (operand-size src)))
3641 (aver (or (eq src-size :qword) (eq src-size :dword))))
3642 (emit-sse-inst segment dst src ,prefix ,opcode)))))
3643 (define-integer-source-sse-inst cvtsi2sd #xf2 #x2a)
3644 (define-integer-source-sse-inst cvtsi2ss #xf3 #x2a))
3646 ;;; Instructions having a general-purpose register as the destination
3647 ;;; operand and an XMM register or a memory location as the source
3648 ;;; operand. The operand size is calculated from the destination
3651 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode)
3652 `(define-instruction ,name (segment dst src)
3653 (:printer ext-reg-xmm/mem ((prefix ,prefix) (op ,opcode)))
3654 (:printer ext-rex-reg-xmm/mem ((prefix ,prefix) (op ,opcode)))
3656 (aver (register-p dst))
3657 (let ((dst-size (operand-size dst)))
3658 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3659 (emit-sse-inst segment dst src ,prefix ,opcode
3660 :operand-size dst-size))))))
3661 (define-gpr-destination-sse-inst cvtsd2si #xf2 #x2d)
3662 (define-gpr-destination-sse-inst cvtss2si #xf3 #x2d)
3663 (define-gpr-destination-sse-inst cvttsd2si #xf2 #x2c)
3664 (define-gpr-destination-sse-inst cvttss2si #xf3 #x2c))
3666 ;;; Other SSE instructions
3668 (define-instruction ldmxcsr (segment src)
3670 (emit-byte segment #x0f)
3671 (emit-byte segment #xae)
3672 (emit-ea segment src 2)))
3674 (define-instruction stmxcsr (segment dst)
3676 (emit-byte segment #x0f)
3677 (emit-byte segment #xae)
3678 (emit-ea segment dst 3)))