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 ;;; Most uses of dwords are as displacements or as immediate values in
1106 ;;; 64-bit operations. In these cases they are sign-extended to 64 bits.
1107 ;;; EMIT-DWORD is unsuitable there because it accepts values of type
1108 ;;; (OR (SIGNED-BYTE 32) (UNSIGNED-BYTE 32)), so we provide a more
1109 ;;; restricted emitter here.
1110 (defun emit-signed-dword (segment value)
1111 (declare (type segment segment)
1112 (type (signed-byte 32) value))
1113 (declare (inline emit-dword))
1114 (emit-dword segment value))
1116 (define-bitfield-emitter emit-qword 64
1119 (define-bitfield-emitter emit-byte-with-reg 8
1120 (byte 5 3) (byte 3 0))
1122 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
1123 (byte 2 6) (byte 3 3) (byte 3 0))
1125 (define-bitfield-emitter emit-sib-byte 8
1126 (byte 2 6) (byte 3 3) (byte 3 0))
1128 (define-bitfield-emitter emit-rex-byte 8
1129 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
1135 (defun emit-absolute-fixup (segment fixup &optional quad-p)
1136 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
1137 (let ((offset (fixup-offset fixup)))
1138 (if (label-p offset)
1139 (emit-back-patch segment
1141 (lambda (segment posn)
1142 (declare (ignore posn))
1143 (let ((val (- (+ (component-header-length)
1144 (or (label-position offset)
1146 other-pointer-lowtag)))
1148 (emit-qword segment val)
1149 (emit-signed-dword segment val)))))
1151 (emit-qword segment (or offset 0))
1152 (emit-signed-dword segment (or offset 0))))))
1154 (defun emit-relative-fixup (segment fixup)
1155 (note-fixup segment :relative fixup)
1156 (emit-signed-dword segment (or (fixup-offset fixup) 0)))
1159 ;;;; the effective-address (ea) structure
1161 (defun reg-tn-encoding (tn)
1162 (declare (type tn tn))
1163 ;; ea only has space for three bits of register number: regs r8
1164 ;; and up are selected by a REX prefix byte which caller is responsible
1165 ;; for having emitted where necessary already
1166 (ecase (sb-name (sc-sb (tn-sc tn)))
1168 (let ((offset (mod (tn-offset tn) 16)))
1169 (logior (ash (logand offset 1) 2)
1172 (mod (tn-offset tn) 8))))
1174 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1176 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1177 ;; can't actually emit it on its own: caller also needs to emit REX
1179 (size nil :type (member :byte :word :dword :qword))
1180 (base nil :type (or tn null))
1181 (index nil :type (or tn null))
1182 (scale 1 :type (member 1 2 4 8))
1183 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1184 (def!method print-object ((ea ea) stream)
1185 (cond ((or *print-escape* *print-readably*)
1186 (print-unreadable-object (ea stream :type t)
1188 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1192 (let ((scale (ea-scale ea)))
1193 (if (= scale 1) nil scale))
1196 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1198 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1200 (write-string "+" stream)))
1202 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1203 (unless (= (ea-scale ea) 1)
1204 (format stream "*~A" (ea-scale ea)))
1205 (typecase (ea-disp ea)
1208 (format stream "~@D" (ea-disp ea)))
1210 (format stream "+~A" (ea-disp ea))))
1211 (write-char #\] stream))))
1213 (defun emit-constant-tn-rip (segment constant-tn reg)
1214 ;; AMD64 doesn't currently have a code object register to use as a
1215 ;; base register for constant access. Instead we use RIP-relative
1216 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1217 ;; is passed to the backpatch callback. In addition we need the offset
1218 ;; from the start of the function header to the slot in the CODE-HEADER
1219 ;; that stores the constant. Since we don't know where the code header
1220 ;; starts, instead count backwards from the function header.
1221 (let* ((2comp (component-info *component-being-compiled*))
1222 (constants (ir2-component-constants 2comp))
1223 (len (length constants))
1224 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1225 ;; If there are an even amount of constants, there will be
1226 ;; an extra qword of padding before the function header, which
1227 ;; needs to be adjusted for. XXX: This will break if new slots
1228 ;; are added to the code header.
1229 (offset (* (- (+ len (if (evenp len)
1232 (tn-offset constant-tn))
1234 ;; RIP-relative addressing
1235 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1236 (emit-back-patch segment
1238 (lambda (segment posn)
1239 ;; The addressing is relative to end of instruction,
1240 ;; i.e. the end of this dword. Hence the + 4.
1241 (emit-signed-dword segment
1242 (+ 4 (- (+ offset posn)))))))
1245 (defun emit-label-rip (segment fixup reg)
1246 (let ((label (fixup-offset fixup)))
1247 ;; RIP-relative addressing
1248 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1249 (emit-back-patch segment
1251 (lambda (segment posn)
1252 (emit-signed-dword segment (- (label-position label)
1256 (defun emit-ea (segment thing reg &optional allow-constants)
1259 ;; this would be eleganter if we had a function that would create
1261 (ecase (sb-name (sc-sb (tn-sc thing)))
1262 ((registers float-registers)
1263 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1265 ;; Convert stack tns into an index off RBP.
1266 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
1267 (cond ((< -128 disp 127)
1268 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1269 (emit-byte segment disp))
1271 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1272 (emit-signed-dword segment disp)))))
1274 (unless allow-constants
1277 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1278 (emit-constant-tn-rip segment thing reg))))
1280 (let* ((base (ea-base thing))
1281 (index (ea-index thing))
1282 (scale (ea-scale thing))
1283 (disp (ea-disp thing))
1284 (mod (cond ((or (null base)
1286 (not (= (reg-tn-encoding base) #b101))))
1288 ((and (fixnump disp) (<= -128 disp 127))
1292 (r/m (cond (index #b100)
1294 (t (reg-tn-encoding base)))))
1295 (when (and (= mod 0) (= r/m #b101))
1296 ;; this is rip-relative in amd64, so we'll use a sib instead
1297 (setf r/m #b100 scale 1))
1298 (emit-mod-reg-r/m-byte segment mod reg r/m)
1300 (let ((ss (1- (integer-length scale)))
1301 (index (if (null index)
1303 (let ((index (reg-tn-encoding index)))
1305 (error "can't index off of ESP")
1307 (base (if (null base)
1309 (reg-tn-encoding base))))
1310 (emit-sib-byte segment ss index base)))
1312 (emit-byte segment disp))
1313 ((or (= mod #b10) (null base))
1315 (emit-absolute-fixup segment disp)
1316 (emit-signed-dword segment disp))))))
1318 (typecase (fixup-offset thing)
1320 (emit-label-rip segment thing reg))
1322 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1323 (emit-sib-byte segment 0 #b100 #b101)
1324 (emit-absolute-fixup segment thing))))))
1326 ;;; like the above, but for fp-instructions--jrd
1327 (defun emit-fp-op (segment thing op)
1328 (if (fp-reg-tn-p thing)
1329 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
1332 (emit-ea segment thing op)))
1334 (defun byte-reg-p (thing)
1336 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1337 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1340 (defun byte-ea-p (thing)
1342 (ea (eq (ea-size thing) :byte))
1344 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1347 (defun word-reg-p (thing)
1349 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1350 (member (sc-name (tn-sc thing)) *word-sc-names*)
1353 (defun word-ea-p (thing)
1355 (ea (eq (ea-size thing) :word))
1356 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1359 (defun dword-reg-p (thing)
1361 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1362 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1365 (defun dword-ea-p (thing)
1367 (ea (eq (ea-size thing) :dword))
1369 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1372 (defun qword-reg-p (thing)
1374 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1375 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1378 (defun qword-ea-p (thing)
1380 (ea (eq (ea-size thing) :qword))
1382 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1385 ;;; Return true if THING is a general-purpose register TN.
1386 (defun register-p (thing)
1388 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1390 (defun accumulator-p (thing)
1391 (and (register-p thing)
1392 (= (tn-offset thing) 0)))
1394 ;;; Return true if THING is an XMM register TN.
1395 (defun xmm-register-p (thing)
1397 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1402 (def!constant +operand-size-prefix-byte+ #b01100110)
1404 (defun maybe-emit-operand-size-prefix (segment size)
1405 (unless (or (eq size :byte)
1406 (eq size :qword) ; REX prefix handles this
1407 (eq size +default-operand-size+))
1408 (emit-byte segment +operand-size-prefix-byte+)))
1410 ;;; A REX prefix must be emitted if at least one of the following
1411 ;;; conditions is true:
1412 ;; 1. The operand size is :QWORD and the default operand size of the
1413 ;; instruction is not :QWORD.
1414 ;;; 2. The instruction references an extended register.
1415 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1418 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1419 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1420 ;;; this should not happen, for example because the instruction's
1421 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1422 ;;; registers the encodings of which are extended with the REX.R, REX.X
1423 ;;; and REX.B bit, respectively. To determine whether one of the byte
1424 ;;; registers is used that can only be accessed using a REX prefix, we
1425 ;;; need only to test R and B, because X is only used for the index
1426 ;;; register of an effective address and therefore never byte-sized.
1427 ;;; For R we can avoid to calculate the size of the TN because it is
1428 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1429 ;;; B can be address-sized (if it is the base register of an effective
1430 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1431 ;;; registers) or of some different size (in the instructions that
1432 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD and
1433 ;;; several SSE instructions, e.g. CVTSD2SI). We don't distinguish
1434 ;;; between general-purpose and floating point registers for this cause
1435 ;;; because only general-purpose registers can be byte-sized at all.
1436 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1437 (declare (type (member nil :byte :word :dword :qword :do-not-set)
1439 (type (or null tn) r x b))
1441 (if (and r (> (tn-offset r)
1442 ;; offset of r8 is 16, offset of xmm8 is 8
1443 (if (eq (sb-name (sc-sb (tn-sc r)))
1450 ;; Assuming R is a TN describing a general-purpose
1451 ;; register, return true if it references register
1453 (<= 8 (tn-offset r) 15)))
1454 (let ((rex-w (if (eq operand-size :qword) 1 0))
1458 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1460 (eq operand-size :byte)
1463 (eq (operand-size b) :byte)
1465 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1467 ;;; Emit a REX prefix if necessary. The operand size is determined from
1468 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1469 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1470 ;;; pass its index and base registers, if it is a register TN, we pass
1472 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1473 ;;; be treated specially here: If THING is a stack TN, neither it nor
1474 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1475 ;;; works correctly because stack references always use RBP as the base
1476 ;;; register and never use an index register so no extended registers
1477 ;;; need to be accessed. Fixups are assembled using an addressing mode
1478 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1479 ;;; not reference an extended register. The displacement-only addressing
1480 ;;; mode requires that REX.X is 0, which is ensured here.
1481 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1482 (declare (type (or ea tn fixup) thing)
1483 (type (or null tn) reg)
1484 (type (member nil :byte :word :dword :qword :do-not-set)
1486 (let ((ea-p (ea-p thing)))
1487 (maybe-emit-rex-prefix segment
1488 (or operand-size (operand-size thing))
1490 (and ea-p (ea-index thing))
1491 (cond (ea-p (ea-base thing))
1493 (member (sb-name (sc-sb (tn-sc thing)))
1494 '(float-registers registers)))
1498 (defun operand-size (thing)
1501 ;; FIXME: might as well be COND instead of having to use #. readmacro
1502 ;; to hack up the code
1503 (case (sc-name (tn-sc thing))
1512 ;; added by jrd: float-registers is a separate size (?)
1513 ;; The only place in the code where we are called with THING
1514 ;; being a float-register is in MAYBE-EMIT-REX-PREFIX when it
1515 ;; checks whether THING is a byte register. Thus our result in
1516 ;; these cases could as well be :dword and :qword. I leave it as
1517 ;; :float and :double which is more likely to trigger an aver
1518 ;; instead of silently doing the wrong thing in case this
1519 ;; situation should change. Lutz Euler, 2005-10-23.
1522 (#.*double-sc-names*
1525 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1529 ;; GNA. Guess who spelt "flavor" correctly first time round?
1530 ;; There's a strong argument in my mind to change all uses of
1531 ;; "flavor" to "kind": and similarly with some misguided uses of
1532 ;; "type" here and there. -- CSR, 2005-01-06.
1533 (case (fixup-flavor thing)
1534 ((:foreign-dataref) :qword)))
1538 (defun matching-operand-size (dst src)
1539 (let ((dst-size (operand-size dst))
1540 (src-size (operand-size src)))
1543 (if (eq dst-size src-size)
1545 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1546 dst dst-size src src-size))
1550 (error "can't tell the size of either ~S or ~S" dst src)))))
1552 ;;; Except in a very few cases (MOV instructions A1, A3 and B8 - BF)
1553 ;;; we expect dword data bytes even when 64 bit work is being done.
1554 ;;; But A1 and A3 are currently unused and B8 - BF use EMIT-QWORD
1555 ;;; directly, so we emit all quad constants as dwords, additionally
1556 ;;; making sure that they survive the sign-extension to 64 bits
1558 (defun emit-sized-immediate (segment size value)
1561 (emit-byte segment value))
1563 (emit-word segment value))
1565 (emit-dword segment value))
1567 (emit-signed-dword segment value))))
1569 ;;;; general data transfer
1571 ;;; This is the part of the MOV instruction emitter that does moving
1572 ;;; of an immediate value into a qword register. We go to some length
1573 ;;; to achieve the shortest possible encoding.
1574 (defun emit-immediate-move-to-qword-register (segment dst src)
1575 (declare (type integer src))
1576 (cond ((typep src '(unsigned-byte 32))
1577 ;; We use the B8 - BF encoding with an operand size of 32 bits
1578 ;; here and let the implicit zero-extension fill the upper half
1579 ;; of the 64-bit destination register. Instruction size: five
1580 ;; or six bytes. (A REX prefix will be emitted only if the
1581 ;; destination is an extended register.)
1582 (maybe-emit-rex-prefix segment :dword nil nil dst)
1583 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1584 (emit-dword segment src))
1586 (maybe-emit-rex-prefix segment :qword nil nil dst)
1587 (cond ((typep src '(signed-byte 32))
1588 ;; Use the C7 encoding that takes a 32-bit immediate and
1589 ;; sign-extends it to 64 bits. Instruction size: seven
1591 (emit-byte segment #b11000111)
1592 (emit-mod-reg-r/m-byte segment #b11 #b000
1593 (reg-tn-encoding dst))
1594 (emit-signed-dword segment src))
1595 ((typep src `(integer ,(- (expt 2 64) (expt 2 31))
1597 ;; This triggers on positive integers of 64 bits length
1598 ;; with the most significant 33 bits being 1. We use the
1599 ;; same encoding as in the previous clause.
1600 (emit-byte segment #b11000111)
1601 (emit-mod-reg-r/m-byte segment #b11 #b000
1602 (reg-tn-encoding dst))
1603 (emit-signed-dword segment (- src (expt 2 64))))
1605 ;; We need a full 64-bit immediate. Instruction size:
1607 (emit-byte-with-reg segment #b10111 (reg-tn-encoding dst))
1608 (emit-qword segment src))))))
1610 (define-instruction mov (segment dst src)
1611 ;; immediate to register
1612 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1613 '(:name :tab reg ", " imm))
1614 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1615 '(:name :tab reg ", " imm))
1616 ;; absolute mem to/from accumulator
1617 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1618 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1619 ;; register to/from register/memory
1620 (:printer reg-reg/mem-dir ((op #b100010)))
1621 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1622 ;; immediate to register/memory
1623 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1624 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1627 (let ((size (matching-operand-size dst src)))
1628 (maybe-emit-operand-size-prefix segment size)
1629 (cond ((register-p dst)
1630 (cond ((integerp src)
1631 (cond ((eq size :qword)
1632 (emit-immediate-move-to-qword-register segment
1635 (maybe-emit-rex-prefix segment size nil nil dst)
1636 (emit-byte-with-reg segment
1640 (reg-tn-encoding dst))
1641 (emit-sized-immediate segment size src))))
1643 (maybe-emit-rex-for-ea segment src dst)
1648 (emit-ea segment src (reg-tn-encoding dst) t))))
1650 ;; C7 only deals with 32 bit immediates even if the
1651 ;; destination is a 64-bit location. The value is
1652 ;; sign-extended in this case.
1653 (maybe-emit-rex-for-ea segment dst nil)
1654 (emit-byte segment (if (eq size :byte) #b11000110 #b11000111))
1655 (emit-ea segment dst #b000)
1656 (emit-sized-immediate segment size src))
1658 (maybe-emit-rex-for-ea segment dst src)
1659 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1660 (emit-ea segment dst (reg-tn-encoding src)))
1662 ;; Generally we can't MOV a fixupped value into an EA, since
1663 ;; MOV on non-registers can only take a 32-bit immediate arg.
1664 ;; Make an exception for :FOREIGN fixups (pretty much just
1665 ;; the runtime asm, since other foreign calls go through the
1666 ;; the linkage table) and for linkage table references, since
1667 ;; these should always end up in low memory.
1668 (aver (or (eq (fixup-flavor src) :foreign)
1669 (eq (fixup-flavor src) :foreign-dataref)
1670 (eq (ea-size dst) :dword)))
1671 (maybe-emit-rex-for-ea segment dst nil)
1672 (emit-byte segment #b11000111)
1673 (emit-ea segment dst #b000)
1674 (emit-absolute-fixup segment src))
1676 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1678 (defun emit-move-with-extension (segment dst src signed-p)
1679 (aver (register-p dst))
1680 (let ((dst-size (operand-size dst))
1681 (src-size (operand-size src))
1682 (opcode (if signed-p #b10111110 #b10110110)))
1685 (aver (eq src-size :byte))
1686 (maybe-emit-operand-size-prefix segment :word)
1687 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1688 (maybe-emit-rex-for-ea segment src dst :operand-size :word)
1689 (emit-byte segment #b00001111)
1690 (emit-byte segment opcode)
1691 (emit-ea segment src (reg-tn-encoding dst)))
1695 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1696 (emit-byte segment #b00001111)
1697 (emit-byte segment opcode)
1698 (emit-ea segment src (reg-tn-encoding dst)))
1700 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1701 (emit-byte segment #b00001111)
1702 (emit-byte segment (logior opcode 1))
1703 (emit-ea segment src (reg-tn-encoding dst)))
1705 (aver (eq dst-size :qword))
1706 ;; dst is in reg, src is in modrm
1707 (let ((ea-p (ea-p src)))
1708 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1709 (and ea-p (ea-index src))
1710 (cond (ea-p (ea-base src))
1713 (emit-byte segment #x63) ;movsxd
1714 ;;(emit-byte segment opcode)
1715 (emit-ea segment src (reg-tn-encoding dst)))))))))
1717 (define-instruction movsx (segment dst src)
1718 (:printer ext-reg-reg/mem-no-width
1719 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1720 (:printer rex-ext-reg-reg/mem-no-width
1721 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1722 (:printer ext-reg-reg/mem-no-width
1723 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1724 (:printer rex-ext-reg-reg/mem-no-width
1725 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1726 (:emitter (emit-move-with-extension segment dst src :signed)))
1728 (define-instruction movzx (segment dst src)
1729 (:printer ext-reg-reg/mem-no-width
1730 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1731 (:printer rex-ext-reg-reg/mem-no-width
1732 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1733 (:printer ext-reg-reg/mem-no-width
1734 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1735 (:printer rex-ext-reg-reg/mem-no-width
1736 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1737 (:emitter (emit-move-with-extension segment dst src nil)))
1739 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1740 ;;; sign-extends the dword source into the qword destination register.
1741 ;;; If the operand size is :dword the instruction zero-extends the dword
1742 ;;; source into the qword destination register, i.e. it does the same as
1743 ;;; a dword MOV into a register.
1744 (define-instruction movsxd (segment dst src)
1745 (:printer reg-reg/mem ((op #b0110001) (width 1)
1746 (reg/mem nil :type 'sized-dword-reg/mem)))
1747 (:printer rex-reg-reg/mem ((op #b0110001) (width 1)
1748 (reg/mem nil :type 'sized-dword-reg/mem)))
1749 (:emitter (emit-move-with-extension segment dst src :signed)))
1751 ;;; this is not a real amd64 instruction, of course
1752 (define-instruction movzxd (segment dst src)
1753 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1754 (:emitter (emit-move-with-extension segment dst src nil)))
1756 (define-instruction push (segment src)
1758 (:printer reg-no-width-default-qword ((op #b01010)))
1759 (:printer rex-reg-no-width-default-qword ((op #b01010)))
1761 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1762 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b110))))
1764 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1766 (:printer byte ((op #b01101000)
1767 (imm nil :type 'signed-imm-data-default-qword))
1769 ;; ### segment registers?
1772 (cond ((integerp src)
1773 (cond ((<= -128 src 127)
1774 (emit-byte segment #b01101010)
1775 (emit-byte segment src))
1777 ;; A REX-prefix is not needed because the operand size
1778 ;; defaults to 64 bits. The size of the immediate is 32
1779 ;; bits and it is sign-extended.
1780 (emit-byte segment #b01101000)
1781 (emit-signed-dword segment src))))
1783 (let ((size (operand-size src)))
1784 (aver (or (eq size :qword) (eq size :word)))
1785 (maybe-emit-operand-size-prefix segment size)
1786 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1787 (cond ((register-p src)
1788 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1790 (emit-byte segment #b11111111)
1791 (emit-ea segment src #b110 t))))))))
1793 (define-instruction pop (segment dst)
1794 (:printer reg-no-width-default-qword ((op #b01011)))
1795 (:printer rex-reg-no-width-default-qword ((op #b01011)))
1796 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1797 (:printer rex-reg/mem-default-qword ((op '(#b10001111 #b000))))
1799 (let ((size (operand-size dst)))
1800 (aver (or (eq size :qword) (eq size :word)))
1801 (maybe-emit-operand-size-prefix segment size)
1802 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1803 (cond ((register-p dst)
1804 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1806 (emit-byte segment #b10001111)
1807 (emit-ea segment dst #b000))))))
1809 (define-instruction xchg (segment operand1 operand2)
1810 ;; Register with accumulator.
1811 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1812 ;; Register/Memory with Register.
1813 (:printer reg-reg/mem ((op #b1000011)))
1814 (:printer rex-reg-reg/mem ((op #b1000011)))
1816 (let ((size (matching-operand-size operand1 operand2)))
1817 (maybe-emit-operand-size-prefix segment size)
1818 (labels ((xchg-acc-with-something (acc something)
1819 (if (and (not (eq size :byte)) (register-p something))
1821 (maybe-emit-rex-for-ea segment acc something)
1822 (emit-byte-with-reg segment
1824 (reg-tn-encoding something)))
1825 (xchg-reg-with-something acc something)))
1826 (xchg-reg-with-something (reg something)
1827 (maybe-emit-rex-for-ea segment something reg)
1828 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1829 (emit-ea segment something (reg-tn-encoding reg))))
1830 (cond ((accumulator-p operand1)
1831 (xchg-acc-with-something operand1 operand2))
1832 ((accumulator-p operand2)
1833 (xchg-acc-with-something operand2 operand1))
1834 ((register-p operand1)
1835 (xchg-reg-with-something operand1 operand2))
1836 ((register-p operand2)
1837 (xchg-reg-with-something operand2 operand1))
1839 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1841 (define-instruction lea (segment dst src)
1842 (:printer rex-reg-reg/mem ((op #b1000110)))
1843 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1845 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1846 (maybe-emit-rex-for-ea segment src dst
1847 :operand-size :qword)
1848 (emit-byte segment #b10001101)
1849 (emit-ea segment src (reg-tn-encoding dst))))
1851 (define-instruction cmpxchg (segment dst src)
1852 ;; Register/Memory with Register.
1853 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1855 (aver (register-p src))
1856 (let ((size (matching-operand-size src dst)))
1857 (maybe-emit-operand-size-prefix segment size)
1858 (maybe-emit-rex-for-ea segment dst src)
1859 (emit-byte segment #b00001111)
1860 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1861 (emit-ea segment dst (reg-tn-encoding src)))))
1865 (define-instruction fs-segment-prefix (segment)
1867 (emit-byte segment #x64)))
1869 ;;;; flag control instructions
1871 ;;; CLC -- Clear Carry Flag.
1872 (define-instruction clc (segment)
1873 (:printer byte ((op #b11111000)))
1875 (emit-byte segment #b11111000)))
1877 ;;; CLD -- Clear Direction Flag.
1878 (define-instruction cld (segment)
1879 (:printer byte ((op #b11111100)))
1881 (emit-byte segment #b11111100)))
1883 ;;; CLI -- Clear Iterrupt Enable Flag.
1884 (define-instruction cli (segment)
1885 (:printer byte ((op #b11111010)))
1887 (emit-byte segment #b11111010)))
1889 ;;; CMC -- Complement Carry Flag.
1890 (define-instruction cmc (segment)
1891 (:printer byte ((op #b11110101)))
1893 (emit-byte segment #b11110101)))
1895 ;;; LAHF -- Load AH into flags.
1896 (define-instruction lahf (segment)
1897 (:printer byte ((op #b10011111)))
1899 (emit-byte segment #b10011111)))
1901 ;;; POPF -- Pop flags.
1902 (define-instruction popf (segment)
1903 (:printer byte ((op #b10011101)))
1905 (emit-byte segment #b10011101)))
1907 ;;; PUSHF -- push flags.
1908 (define-instruction pushf (segment)
1909 (:printer byte ((op #b10011100)))
1911 (emit-byte segment #b10011100)))
1913 ;;; SAHF -- Store AH into flags.
1914 (define-instruction sahf (segment)
1915 (:printer byte ((op #b10011110)))
1917 (emit-byte segment #b10011110)))
1919 ;;; STC -- Set Carry Flag.
1920 (define-instruction stc (segment)
1921 (:printer byte ((op #b11111001)))
1923 (emit-byte segment #b11111001)))
1925 ;;; STD -- Set Direction Flag.
1926 (define-instruction std (segment)
1927 (:printer byte ((op #b11111101)))
1929 (emit-byte segment #b11111101)))
1931 ;;; STI -- Set Interrupt Enable Flag.
1932 (define-instruction sti (segment)
1933 (:printer byte ((op #b11111011)))
1935 (emit-byte segment #b11111011)))
1939 (defun emit-random-arith-inst (name segment dst src opcode
1940 &optional allow-constants)
1941 (let ((size (matching-operand-size dst src)))
1942 (maybe-emit-operand-size-prefix segment size)
1945 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1946 (maybe-emit-rex-for-ea segment dst nil)
1947 (emit-byte segment #b10000011)
1948 (emit-ea segment dst opcode allow-constants)
1949 (emit-byte segment src))
1950 ((accumulator-p dst)
1951 (maybe-emit-rex-for-ea segment dst nil)
1958 (emit-sized-immediate segment size src))
1960 (maybe-emit-rex-for-ea segment dst nil)
1961 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1962 (emit-ea segment dst opcode allow-constants)
1963 (emit-sized-immediate segment size src))))
1965 (maybe-emit-rex-for-ea segment dst src)
1969 (if (eq size :byte) #b00000000 #b00000001)))
1970 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1972 (maybe-emit-rex-for-ea segment src dst)
1976 (if (eq size :byte) #b00000010 #b00000011)))
1977 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1979 (error "bogus operands to ~A" name)))))
1981 (eval-when (:compile-toplevel :execute)
1982 (defun arith-inst-printer-list (subop)
1983 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1984 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1985 (reg/mem-imm ((op (#b1000000 ,subop))))
1986 (rex-reg/mem-imm ((op (#b1000000 ,subop))))
1987 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1988 ;; therefore we force WIDTH to 1.
1989 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1990 (imm nil :type signed-imm-byte)))
1991 (rex-reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1992 (imm nil :type signed-imm-byte)))
1993 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
1994 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1997 (define-instruction add (segment dst src)
1998 (:printer-list (arith-inst-printer-list #b000))
1999 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
2001 (define-instruction adc (segment dst src)
2002 (:printer-list (arith-inst-printer-list #b010))
2003 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
2005 (define-instruction sub (segment dst src)
2006 (:printer-list (arith-inst-printer-list #b101))
2007 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
2009 (define-instruction sbb (segment dst src)
2010 (:printer-list (arith-inst-printer-list #b011))
2011 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
2013 (define-instruction cmp (segment dst src)
2014 (:printer-list (arith-inst-printer-list #b111))
2015 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
2017 (define-instruction inc (segment dst)
2019 (:printer modrm-reg-no-width ((modrm-reg #b000)))
2021 ;; (:printer rex-reg/mem ((op '(#b11111111 #b001))))
2022 (:printer reg/mem ((op '(#b1111111 #b000))))
2024 (let ((size (operand-size dst)))
2025 (maybe-emit-operand-size-prefix segment size)
2026 (cond #+nil ; these opcodes become REX prefixes in x86-64
2027 ((and (not (eq size :byte)) (register-p dst))
2028 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
2030 (maybe-emit-rex-for-ea segment dst nil)
2031 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2032 (emit-ea segment dst #b000))))))
2034 (define-instruction dec (segment dst)
2036 (:printer modrm-reg-no-width ((modrm-reg #b001)))
2038 (:printer reg/mem ((op '(#b1111111 #b001))))
2040 (let ((size (operand-size dst)))
2041 (maybe-emit-operand-size-prefix segment size)
2043 ((and (not (eq size :byte)) (register-p dst))
2044 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
2046 (maybe-emit-rex-for-ea segment dst nil)
2047 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
2048 (emit-ea segment dst #b001))))))
2050 (define-instruction neg (segment dst)
2051 (:printer reg/mem ((op '(#b1111011 #b011))))
2052 (:printer rex-reg/mem ((op '(#b1111011 #b011))))
2054 (let ((size (operand-size dst)))
2055 (maybe-emit-operand-size-prefix segment size)
2056 (maybe-emit-rex-for-ea segment dst nil)
2057 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2058 (emit-ea segment dst #b011))))
2060 (define-instruction mul (segment dst src)
2061 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
2062 (:printer rex-accum-reg/mem ((op '(#b1111011 #b100))))
2064 (let ((size (matching-operand-size dst src)))
2065 (aver (accumulator-p dst))
2066 (maybe-emit-operand-size-prefix segment size)
2067 (maybe-emit-rex-for-ea segment src nil)
2068 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2069 (emit-ea segment src #b100))))
2071 (define-instruction imul (segment dst &optional src1 src2)
2072 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
2073 (:printer rex-accum-reg/mem ((op '(#b1111011 #b101))))
2074 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
2075 (:printer rex-ext-reg-reg/mem-no-width ((op #b10101111)))
2076 (:printer reg-reg/mem ((op #b0110100) (width 1)
2077 (imm nil :type 'signed-imm-data))
2078 '(:name :tab reg ", " reg/mem ", " imm))
2079 (:printer rex-reg-reg/mem ((op #b0110100) (width 1)
2080 (imm nil :type 'signed-imm-data))
2081 '(:name :tab reg ", " reg/mem ", " imm))
2082 (:printer reg-reg/mem ((op #b0110101) (width 1)
2083 (imm nil :type 'signed-imm-byte))
2084 '(:name :tab reg ", " reg/mem ", " imm))
2085 (:printer rex-reg-reg/mem ((op #b0110101) (width 1)
2086 (imm nil :type 'signed-imm-byte))
2087 '(:name :tab reg ", " reg/mem ", " imm))
2089 (flet ((r/m-with-immed-to-reg (reg r/m immed)
2090 (let* ((size (matching-operand-size reg r/m))
2091 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
2092 (maybe-emit-operand-size-prefix segment size)
2093 (maybe-emit-rex-for-ea segment r/m reg)
2094 (emit-byte segment (if sx #b01101011 #b01101001))
2095 (emit-ea segment r/m (reg-tn-encoding reg))
2097 (emit-byte segment immed)
2098 (emit-sized-immediate segment size immed)))))
2100 (r/m-with-immed-to-reg dst src1 src2))
2103 (r/m-with-immed-to-reg dst dst src1)
2104 (let ((size (matching-operand-size dst src1)))
2105 (maybe-emit-operand-size-prefix segment size)
2106 (maybe-emit-rex-for-ea segment src1 dst)
2107 (emit-byte segment #b00001111)
2108 (emit-byte segment #b10101111)
2109 (emit-ea segment src1 (reg-tn-encoding dst)))))
2111 (let ((size (operand-size dst)))
2112 (maybe-emit-operand-size-prefix segment size)
2113 (maybe-emit-rex-for-ea segment dst nil)
2114 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2115 (emit-ea segment dst #b101)))))))
2117 (define-instruction div (segment dst src)
2118 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
2119 (:printer rex-accum-reg/mem ((op '(#b1111011 #b110))))
2121 (let ((size (matching-operand-size dst src)))
2122 (aver (accumulator-p dst))
2123 (maybe-emit-operand-size-prefix segment size)
2124 (maybe-emit-rex-for-ea segment src nil)
2125 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2126 (emit-ea segment src #b110))))
2128 (define-instruction idiv (segment dst src)
2129 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
2130 (:printer rex-accum-reg/mem ((op '(#b1111011 #b111))))
2132 (let ((size (matching-operand-size dst src)))
2133 (aver (accumulator-p dst))
2134 (maybe-emit-operand-size-prefix segment size)
2135 (maybe-emit-rex-for-ea segment src nil)
2136 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2137 (emit-ea segment src #b111))))
2139 (define-instruction bswap (segment dst)
2140 (:printer ext-reg-no-width ((op #b11001)))
2142 (let ((size (operand-size dst)))
2143 (maybe-emit-rex-prefix segment size nil nil dst)
2144 (emit-byte segment #x0f)
2145 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
2147 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
2148 (define-instruction cbw (segment)
2149 (:printer x66-byte ((op #b10011000)))
2151 (maybe-emit-operand-size-prefix segment :word)
2152 (emit-byte segment #b10011000)))
2154 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
2155 (define-instruction cwde (segment)
2156 (:printer byte ((op #b10011000)))
2158 (maybe-emit-operand-size-prefix segment :dword)
2159 (emit-byte segment #b10011000)))
2161 ;;; CDQE -- Convert Double Word To Quad Word Extended. RAX <- sign_xtnd(EAX)
2162 (define-instruction cdqe (segment)
2163 (:printer rex-byte ((op #b10011000)))
2165 (maybe-emit-rex-prefix segment :qword nil nil nil)
2166 (emit-byte segment #b10011000)))
2168 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
2169 (define-instruction cwd (segment)
2170 (:printer x66-byte ((op #b10011001)))
2172 (maybe-emit-operand-size-prefix segment :word)
2173 (emit-byte segment #b10011001)))
2175 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
2176 (define-instruction cdq (segment)
2177 (:printer byte ((op #b10011001)))
2179 (maybe-emit-operand-size-prefix segment :dword)
2180 (emit-byte segment #b10011001)))
2182 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
2183 (define-instruction cqo (segment)
2184 (:printer rex-byte ((op #b10011001)))
2186 (maybe-emit-rex-prefix segment :qword nil nil nil)
2187 (emit-byte segment #b10011001)))
2189 (define-instruction xadd (segment dst src)
2190 ;; Register/Memory with Register.
2191 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
2193 (aver (register-p src))
2194 (let ((size (matching-operand-size src dst)))
2195 (maybe-emit-operand-size-prefix segment size)
2196 (maybe-emit-rex-for-ea segment dst src)
2197 (emit-byte segment #b00001111)
2198 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2199 (emit-ea segment dst (reg-tn-encoding src)))))
2204 (defun emit-shift-inst (segment dst amount opcode)
2205 (let ((size (operand-size dst)))
2206 (maybe-emit-operand-size-prefix segment size)
2207 (multiple-value-bind (major-opcode immed)
2209 (:cl (values #b11010010 nil))
2210 (1 (values #b11010000 nil))
2211 (t (values #b11000000 t)))
2212 (maybe-emit-rex-for-ea segment dst nil)
2214 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2215 (emit-ea segment dst opcode)
2217 (emit-byte segment amount)))))
2219 (eval-when (:compile-toplevel :execute)
2220 (defun shift-inst-printer-list (subop)
2221 `((reg/mem ((op (#b1101000 ,subop)))
2222 (:name :tab reg/mem ", 1"))
2223 (rex-reg/mem ((op (#b1101000 ,subop)))
2224 (:name :tab reg/mem ", 1"))
2225 (reg/mem ((op (#b1101001 ,subop)))
2226 (:name :tab reg/mem ", " 'cl))
2227 (rex-reg/mem ((op (#b1101001 ,subop)))
2228 (:name :tab reg/mem ", " 'cl))
2229 (reg/mem-imm ((op (#b1100000 ,subop))
2230 (imm nil :type imm-byte)))
2231 (rex-reg/mem-imm ((op (#b1100000 ,subop))
2232 (imm nil :type imm-byte))))))
2234 (define-instruction rol (segment dst amount)
2236 (shift-inst-printer-list #b000))
2238 (emit-shift-inst segment dst amount #b000)))
2240 (define-instruction ror (segment dst amount)
2242 (shift-inst-printer-list #b001))
2244 (emit-shift-inst segment dst amount #b001)))
2246 (define-instruction rcl (segment dst amount)
2248 (shift-inst-printer-list #b010))
2250 (emit-shift-inst segment dst amount #b010)))
2252 (define-instruction rcr (segment dst amount)
2254 (shift-inst-printer-list #b011))
2256 (emit-shift-inst segment dst amount #b011)))
2258 (define-instruction shl (segment dst amount)
2260 (shift-inst-printer-list #b100))
2262 (emit-shift-inst segment dst amount #b100)))
2264 (define-instruction shr (segment dst amount)
2266 (shift-inst-printer-list #b101))
2268 (emit-shift-inst segment dst amount #b101)))
2270 (define-instruction sar (segment dst amount)
2272 (shift-inst-printer-list #b111))
2274 (emit-shift-inst segment dst amount #b111)))
2276 (defun emit-double-shift (segment opcode dst src amt)
2277 (let ((size (matching-operand-size dst src)))
2278 (when (eq size :byte)
2279 (error "Double shifts can only be used with words."))
2280 (maybe-emit-operand-size-prefix segment size)
2281 (maybe-emit-rex-for-ea segment dst src)
2282 (emit-byte segment #b00001111)
2283 (emit-byte segment (dpb opcode (byte 1 3)
2284 (if (eq amt :cl) #b10100101 #b10100100)))
2285 (emit-ea segment dst (reg-tn-encoding src))
2286 (unless (eq amt :cl)
2287 (emit-byte segment amt))))
2289 (eval-when (:compile-toplevel :execute)
2290 (defun double-shift-inst-printer-list (op)
2292 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
2293 (imm nil :type signed-imm-byte)))
2294 (ext-reg-reg/mem ((op ,(logior op #b101)))
2295 (:name :tab reg/mem ", " 'cl)))))
2297 (define-instruction shld (segment dst src amt)
2298 (:declare (type (or (member :cl) (mod 32)) amt))
2299 (:printer-list (double-shift-inst-printer-list #b10100000))
2301 (emit-double-shift segment #b0 dst src amt)))
2303 (define-instruction shrd (segment dst src amt)
2304 (:declare (type (or (member :cl) (mod 32)) amt))
2305 (:printer-list (double-shift-inst-printer-list #b10101000))
2307 (emit-double-shift segment #b1 dst src amt)))
2309 (define-instruction and (segment dst src)
2311 (arith-inst-printer-list #b100))
2313 (emit-random-arith-inst "AND" segment dst src #b100)))
2315 (define-instruction test (segment this that)
2316 (:printer accum-imm ((op #b1010100)))
2317 (:printer rex-accum-imm ((op #b1010100)))
2318 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2319 (:printer rex-reg/mem-imm ((op '(#b1111011 #b000))))
2320 (:printer reg-reg/mem ((op #b1000010)))
2321 (:printer rex-reg-reg/mem ((op #b1000010)))
2323 (let ((size (matching-operand-size this that)))
2324 (maybe-emit-operand-size-prefix segment size)
2325 (flet ((test-immed-and-something (immed something)
2326 (cond ((accumulator-p something)
2327 (maybe-emit-rex-for-ea segment something nil)
2329 (if (eq size :byte) #b10101000 #b10101001))
2330 (emit-sized-immediate segment size immed))
2332 (maybe-emit-rex-for-ea segment something nil)
2334 (if (eq size :byte) #b11110110 #b11110111))
2335 (emit-ea segment something #b000)
2336 (emit-sized-immediate segment size immed))))
2337 (test-reg-and-something (reg something)
2338 (maybe-emit-rex-for-ea segment something reg)
2339 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2340 (emit-ea segment something (reg-tn-encoding reg))))
2341 (cond ((integerp that)
2342 (test-immed-and-something that this))
2344 (test-immed-and-something this that))
2346 (test-reg-and-something this that))
2348 (test-reg-and-something that this))
2350 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2352 (define-instruction or (segment dst src)
2354 (arith-inst-printer-list #b001))
2356 (emit-random-arith-inst "OR" segment dst src #b001)))
2358 (define-instruction xor (segment dst src)
2360 (arith-inst-printer-list #b110))
2362 (emit-random-arith-inst "XOR" segment dst src #b110)))
2364 (define-instruction not (segment dst)
2365 (:printer reg/mem ((op '(#b1111011 #b010))))
2366 (:printer rex-reg/mem ((op '(#b1111011 #b010))))
2368 (let ((size (operand-size dst)))
2369 (maybe-emit-operand-size-prefix segment size)
2370 (maybe-emit-rex-for-ea segment dst nil)
2371 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2372 (emit-ea segment dst #b010))))
2374 ;;;; string manipulation
2376 (define-instruction cmps (segment size)
2377 (:printer string-op ((op #b1010011)))
2378 (:printer rex-string-op ((op #b1010011)))
2380 (maybe-emit-operand-size-prefix segment size)
2381 (maybe-emit-rex-prefix segment size nil nil nil)
2382 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2384 (define-instruction ins (segment acc)
2385 (:printer string-op ((op #b0110110)))
2386 (:printer rex-string-op ((op #b0110110)))
2388 (let ((size (operand-size acc)))
2389 (aver (accumulator-p acc))
2390 (maybe-emit-operand-size-prefix segment size)
2391 (maybe-emit-rex-prefix segment size nil nil nil)
2392 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2394 (define-instruction lods (segment acc)
2395 (:printer string-op ((op #b1010110)))
2396 (:printer rex-string-op ((op #b1010110)))
2398 (let ((size (operand-size acc)))
2399 (aver (accumulator-p acc))
2400 (maybe-emit-operand-size-prefix segment size)
2401 (maybe-emit-rex-prefix segment size nil nil nil)
2402 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2404 (define-instruction movs (segment size)
2405 (:printer string-op ((op #b1010010)))
2406 (:printer rex-string-op ((op #b1010010)))
2408 (maybe-emit-operand-size-prefix segment size)
2409 (maybe-emit-rex-prefix segment size nil nil nil)
2410 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2412 (define-instruction outs (segment acc)
2413 (:printer string-op ((op #b0110111)))
2414 (:printer rex-string-op ((op #b0110111)))
2416 (let ((size (operand-size acc)))
2417 (aver (accumulator-p acc))
2418 (maybe-emit-operand-size-prefix segment size)
2419 (maybe-emit-rex-prefix segment size nil nil nil)
2420 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2422 (define-instruction scas (segment acc)
2423 (:printer string-op ((op #b1010111)))
2424 (:printer rex-string-op ((op #b1010111)))
2426 (let ((size (operand-size acc)))
2427 (aver (accumulator-p acc))
2428 (maybe-emit-operand-size-prefix segment size)
2429 (maybe-emit-rex-prefix segment size nil nil nil)
2430 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2432 (define-instruction stos (segment acc)
2433 (:printer string-op ((op #b1010101)))
2434 (:printer rex-string-op ((op #b1010101)))
2436 (let ((size (operand-size acc)))
2437 (aver (accumulator-p acc))
2438 (maybe-emit-operand-size-prefix segment size)
2439 (maybe-emit-rex-prefix segment size nil nil nil)
2440 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2442 (define-instruction xlat (segment)
2443 (:printer byte ((op #b11010111)))
2445 (emit-byte segment #b11010111)))
2447 (define-instruction rep (segment)
2449 (emit-byte segment #b11110010)))
2451 (define-instruction repe (segment)
2452 (:printer byte ((op #b11110011)))
2454 (emit-byte segment #b11110011)))
2456 (define-instruction repne (segment)
2457 (:printer byte ((op #b11110010)))
2459 (emit-byte segment #b11110010)))
2462 ;;;; bit manipulation
2464 (define-instruction bsf (segment dst src)
2465 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2466 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111100)))
2468 (let ((size (matching-operand-size dst src)))
2469 (when (eq size :byte)
2470 (error "can't scan bytes: ~S" src))
2471 (maybe-emit-operand-size-prefix segment size)
2472 (maybe-emit-rex-for-ea segment src dst)
2473 (emit-byte segment #b00001111)
2474 (emit-byte segment #b10111100)
2475 (emit-ea segment src (reg-tn-encoding dst)))))
2477 (define-instruction bsr (segment dst src)
2478 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2479 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111101)))
2481 (let ((size (matching-operand-size dst src)))
2482 (when (eq size :byte)
2483 (error "can't scan bytes: ~S" src))
2484 (maybe-emit-operand-size-prefix segment size)
2485 (maybe-emit-rex-for-ea segment src dst)
2486 (emit-byte segment #b00001111)
2487 (emit-byte segment #b10111101)
2488 (emit-ea segment src (reg-tn-encoding dst)))))
2490 (defun emit-bit-test-and-mumble (segment src index opcode)
2491 (let ((size (operand-size src)))
2492 (when (eq size :byte)
2493 (error "can't scan bytes: ~S" src))
2494 (maybe-emit-operand-size-prefix segment size)
2495 (cond ((integerp index)
2496 (maybe-emit-rex-for-ea segment src nil)
2497 (emit-byte segment #b00001111)
2498 (emit-byte segment #b10111010)
2499 (emit-ea segment src opcode)
2500 (emit-byte segment index))
2502 (maybe-emit-rex-for-ea segment src index)
2503 (emit-byte segment #b00001111)
2504 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2505 (emit-ea segment src (reg-tn-encoding index))))))
2507 (eval-when (:compile-toplevel :execute)
2508 (defun bit-test-inst-printer-list (subop)
2509 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2510 (reg/mem nil :type reg/mem)
2511 (imm nil :type imm-byte)
2513 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2515 (:name :tab reg/mem ", " reg)))))
2517 (define-instruction bt (segment src index)
2518 (:printer-list (bit-test-inst-printer-list #b100))
2520 (emit-bit-test-and-mumble segment src index #b100)))
2522 (define-instruction btc (segment src index)
2523 (:printer-list (bit-test-inst-printer-list #b111))
2525 (emit-bit-test-and-mumble segment src index #b111)))
2527 (define-instruction btr (segment src index)
2528 (:printer-list (bit-test-inst-printer-list #b110))
2530 (emit-bit-test-and-mumble segment src index #b110)))
2532 (define-instruction bts (segment src index)
2533 (:printer-list (bit-test-inst-printer-list #b101))
2535 (emit-bit-test-and-mumble segment src index #b101)))
2538 ;;;; control transfer
2540 (define-instruction call (segment where)
2541 (:printer near-jump ((op #b11101000)))
2542 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2543 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b010))))
2547 (emit-byte segment #b11101000) ; 32 bit relative
2548 (emit-back-patch segment
2550 (lambda (segment posn)
2551 (emit-signed-dword segment
2552 (- (label-position where)
2555 (emit-byte segment #b11101000)
2556 (emit-relative-fixup segment where))
2558 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2559 (emit-byte segment #b11111111)
2560 (emit-ea segment where #b010)))))
2562 (defun emit-byte-displacement-backpatch (segment target)
2563 (emit-back-patch segment
2565 (lambda (segment posn)
2566 (let ((disp (- (label-position target) (1+ posn))))
2567 (aver (<= -128 disp 127))
2568 (emit-byte segment disp)))))
2570 (define-instruction jmp (segment cond &optional where)
2571 ;; conditional jumps
2572 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2573 (:printer near-cond-jump () '('j cc :tab label))
2574 ;; unconditional jumps
2575 (:printer short-jump ((op #b1011)))
2576 (:printer near-jump ((op #b11101001)))
2577 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2578 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b100))))
2583 (lambda (segment posn delta-if-after)
2584 (let ((disp (- (label-position where posn delta-if-after)
2586 (when (<= -128 disp 127)
2588 (dpb (conditional-opcode cond)
2591 (emit-byte-displacement-backpatch segment where)
2593 (lambda (segment posn)
2594 (let ((disp (- (label-position where) (+ posn 6))))
2595 (emit-byte segment #b00001111)
2597 (dpb (conditional-opcode cond)
2600 (emit-signed-dword segment disp)))))
2601 ((label-p (setq where cond))
2604 (lambda (segment posn delta-if-after)
2605 (let ((disp (- (label-position where posn delta-if-after)
2607 (when (<= -128 disp 127)
2608 (emit-byte segment #b11101011)
2609 (emit-byte-displacement-backpatch segment where)
2611 (lambda (segment posn)
2612 (let ((disp (- (label-position where) (+ posn 5))))
2613 (emit-byte segment #b11101001)
2614 (emit-signed-dword segment disp)))))
2616 (emit-byte segment #b11101001)
2617 (emit-relative-fixup segment where))
2619 (unless (or (ea-p where) (tn-p where))
2620 (error "don't know what to do with ~A" where))
2621 ;; near jump defaults to 64 bit
2622 ;; w-bit in rex prefix is unnecessary
2623 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2624 (emit-byte segment #b11111111)
2625 (emit-ea segment where #b100)))))
2627 (define-instruction jmp-short (segment label)
2629 (emit-byte segment #b11101011)
2630 (emit-byte-displacement-backpatch segment label)))
2632 (define-instruction ret (segment &optional stack-delta)
2633 (:printer byte ((op #b11000011)))
2634 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2638 (emit-byte segment #b11000010)
2639 (emit-word segment stack-delta))
2641 (emit-byte segment #b11000011)))))
2643 (define-instruction jecxz (segment target)
2644 (:printer short-jump ((op #b0011)))
2646 (emit-byte segment #b11100011)
2647 (emit-byte-displacement-backpatch segment target)))
2649 (define-instruction loop (segment target)
2650 (:printer short-jump ((op #b0010)))
2652 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2653 (emit-byte-displacement-backpatch segment target)))
2655 (define-instruction loopz (segment target)
2656 (:printer short-jump ((op #b0001)))
2658 (emit-byte segment #b11100001)
2659 (emit-byte-displacement-backpatch segment target)))
2661 (define-instruction loopnz (segment target)
2662 (:printer short-jump ((op #b0000)))
2664 (emit-byte segment #b11100000)
2665 (emit-byte-displacement-backpatch segment target)))
2667 ;;;; conditional move
2668 (define-instruction cmov (segment cond dst src)
2669 (:printer cond-move ())
2670 (:printer rex-cond-move ())
2672 (aver (register-p dst))
2673 (let ((size (matching-operand-size dst src)))
2674 (aver (or (eq size :word) (eq size :dword) (eq size :qword)))
2675 (maybe-emit-operand-size-prefix segment size))
2676 (maybe-emit-rex-for-ea segment src dst)
2677 (emit-byte segment #b00001111)
2678 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2679 (emit-ea segment src (reg-tn-encoding dst))))
2681 ;;;; conditional byte set
2683 (define-instruction set (segment dst cond)
2684 (:printer cond-set ())
2686 (maybe-emit-rex-for-ea segment dst nil)
2687 (emit-byte segment #b00001111)
2688 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2689 (emit-ea segment dst #b000)))
2693 (define-instruction enter (segment disp &optional (level 0))
2694 (:declare (type (unsigned-byte 16) disp)
2695 (type (unsigned-byte 8) level))
2696 (:printer enter-format ((op #b11001000)))
2698 (emit-byte segment #b11001000)
2699 (emit-word segment disp)
2700 (emit-byte segment level)))
2702 (define-instruction leave (segment)
2703 (:printer byte ((op #b11001001)))
2705 (emit-byte segment #b11001001)))
2707 ;;;; interrupt instructions
2709 (defun snarf-error-junk (sap offset &optional length-only)
2710 (let* ((length (sb!sys:sap-ref-8 sap offset))
2711 (vector (make-array length :element-type '(unsigned-byte 8))))
2712 (declare (type sb!sys:system-area-pointer sap)
2713 (type (unsigned-byte 8) length)
2714 (type (simple-array (unsigned-byte 8) (*)) vector))
2716 (values 0 (1+ length) nil nil))
2718 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2720 (collect ((sc-offsets)
2722 (lengths 1) ; the length byte
2724 (error-number (sb!c:read-var-integer vector index)))
2727 (when (>= index length)
2729 (let ((old-index index))
2730 (sc-offsets (sb!c:read-var-integer vector index))
2731 (lengths (- index old-index))))
2732 (values error-number
2738 (defmacro break-cases (breaknum &body cases)
2739 (let ((bn-temp (gensym)))
2740 (collect ((clauses))
2741 (dolist (case cases)
2742 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2743 `(let ((,bn-temp ,breaknum))
2744 (cond ,@(clauses))))))
2747 (defun break-control (chunk inst stream dstate)
2748 (declare (ignore inst))
2749 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2750 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2751 ;; map has it undefined; and it should be easier to look in the target
2752 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2753 ;; from first principles whether it's defined in some way that genesis
2755 (case (byte-imm-code chunk dstate)
2758 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2761 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2763 (nt "breakpoint trap"))
2764 (#.pending-interrupt-trap
2765 (nt "pending interrupt trap"))
2768 (#.fun-end-breakpoint-trap
2769 (nt "function end breakpoint trap")))))
2771 (define-instruction break (segment code)
2772 (:declare (type (unsigned-byte 8) code))
2773 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2774 :control #'break-control)
2776 (emit-byte segment #b11001100)
2777 (emit-byte segment code)))
2779 (define-instruction int (segment number)
2780 (:declare (type (unsigned-byte 8) number))
2781 (:printer byte-imm ((op #b11001101)))
2785 (emit-byte segment #b11001100))
2787 (emit-byte segment #b11001101)
2788 (emit-byte segment number)))))
2790 (define-instruction iret (segment)
2791 (:printer byte ((op #b11001111)))
2793 (emit-byte segment #b11001111)))
2795 ;;;; processor control
2797 (define-instruction hlt (segment)
2798 (:printer byte ((op #b11110100)))
2800 (emit-byte segment #b11110100)))
2802 (define-instruction nop (segment)
2803 (:printer byte ((op #b10010000)))
2805 (emit-byte segment #b10010000)))
2807 (define-instruction wait (segment)
2808 (:printer byte ((op #b10011011)))
2810 (emit-byte segment #b10011011)))
2812 (define-instruction lock (segment)
2813 (:printer byte ((op #b11110000)))
2815 (emit-byte segment #b11110000)))
2817 ;;;; miscellaneous hackery
2819 (define-instruction byte (segment byte)
2821 (emit-byte segment byte)))
2823 (define-instruction word (segment word)
2825 (emit-word segment word)))
2827 (define-instruction dword (segment dword)
2829 (emit-dword segment dword)))
2831 (defun emit-header-data (segment type)
2832 (emit-back-patch segment
2834 (lambda (segment posn)
2838 (component-header-length))
2842 (define-instruction simple-fun-header-word (segment)
2844 (emit-header-data segment simple-fun-header-widetag)))
2846 (define-instruction lra-header-word (segment)
2848 (emit-header-data segment return-pc-header-widetag)))
2850 ;;;; fp instructions
2852 ;;;; Note: We treat the single-precision and double-precision variants
2853 ;;;; as separate instructions.
2855 ;;; Load single to st(0).
2856 (define-instruction fld (segment source)
2857 (:printer floating-point ((op '(#b001 #b000))))
2859 (and (not (fp-reg-tn-p source))
2860 (maybe-emit-rex-for-ea segment source nil))
2861 (emit-byte segment #b11011001)
2862 (emit-fp-op segment source #b000)))
2864 ;;; Load double to st(0).
2865 (define-instruction fldd (segment source)
2866 (:printer floating-point ((op '(#b101 #b000))))
2867 (:printer floating-point-fp ((op '(#b001 #b000))))
2869 (if (fp-reg-tn-p source)
2870 (emit-byte segment #b11011001)
2872 (maybe-emit-rex-for-ea segment source nil)
2873 (emit-byte segment #b11011101)))
2874 (emit-fp-op segment source #b000)))
2876 ;;; Load long to st(0).
2877 (define-instruction fldl (segment source)
2878 (:printer floating-point ((op '(#b011 #b101))))
2880 (and (not (fp-reg-tn-p source))
2881 (maybe-emit-rex-for-ea segment source nil))
2882 (emit-byte segment #b11011011)
2883 (emit-fp-op segment source #b101)))
2885 ;;; Store single from st(0).
2886 (define-instruction fst (segment dest)
2887 (:printer floating-point ((op '(#b001 #b010))))
2889 (cond ((fp-reg-tn-p dest)
2890 (emit-byte segment #b11011101)
2891 (emit-fp-op segment dest #b010))
2893 (maybe-emit-rex-for-ea segment dest nil)
2894 (emit-byte segment #b11011001)
2895 (emit-fp-op segment dest #b010)))))
2897 ;;; Store double from st(0).
2898 (define-instruction fstd (segment dest)
2899 (:printer floating-point ((op '(#b101 #b010))))
2900 (:printer floating-point-fp ((op '(#b101 #b010))))
2902 (cond ((fp-reg-tn-p dest)
2903 (emit-byte segment #b11011101)
2904 (emit-fp-op segment dest #b010))
2906 (maybe-emit-rex-for-ea segment dest nil)
2907 (emit-byte segment #b11011101)
2908 (emit-fp-op segment dest #b010)))))
2910 ;;; Arithmetic ops are all done with at least one operand at top of
2911 ;;; stack. The other operand is is another register or a 32/64 bit
2914 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2915 ;;; that these conflict with the Gdb conventions for binops. To reduce
2916 ;;; the confusion I've added comments showing the mathamatical
2917 ;;; operation and the two syntaxes. By the ASM386 convention the
2918 ;;; instruction syntax is:
2921 ;;; or Fop Destination, Source
2923 ;;; If only one operand is given then it is the source and the
2924 ;;; destination is ST(0). There are reversed forms of the fsub and
2925 ;;; fdiv instructions inducated by an 'R' suffix.
2927 ;;; The mathematical operation for the non-reverse form is always:
2928 ;;; destination = destination op source
2930 ;;; For the reversed form it is:
2931 ;;; destination = source op destination
2933 ;;; The instructions below only accept one operand at present which is
2934 ;;; usually the source. I've hack in extra instructions to implement
2935 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2936 ;;; the operand is the destination with the source being ST(0).
2939 ;;; st(0) = st(0) + memory or st(i).
2940 (define-instruction fadd (segment source)
2941 (:printer floating-point ((op '(#b000 #b000))))
2943 (and (not (fp-reg-tn-p source))
2944 (maybe-emit-rex-for-ea segment source nil))
2945 (emit-byte segment #b11011000)
2946 (emit-fp-op segment source #b000)))
2949 ;;; st(0) = st(0) + memory or st(i).
2950 (define-instruction faddd (segment source)
2951 (:printer floating-point ((op '(#b100 #b000))))
2952 (:printer floating-point-fp ((op '(#b000 #b000))))
2954 (and (not (fp-reg-tn-p source))
2955 (maybe-emit-rex-for-ea segment source nil))
2956 (if (fp-reg-tn-p source)
2957 (emit-byte segment #b11011000)
2958 (emit-byte segment #b11011100))
2959 (emit-fp-op segment source #b000)))
2961 ;;; Add double destination st(i):
2962 ;;; st(i) = st(0) + st(i).
2963 (define-instruction fadd-sti (segment destination)
2964 (:printer floating-point-fp ((op '(#b100 #b000))))
2966 (aver (fp-reg-tn-p destination))
2967 (emit-byte segment #b11011100)
2968 (emit-fp-op segment destination #b000)))
2970 (define-instruction faddp-sti (segment destination)
2971 (:printer floating-point-fp ((op '(#b110 #b000))))
2973 (aver (fp-reg-tn-p destination))
2974 (emit-byte segment #b11011110)
2975 (emit-fp-op segment destination #b000)))
2977 ;;; Subtract single:
2978 ;;; st(0) = st(0) - memory or st(i).
2979 (define-instruction fsub (segment source)
2980 (:printer floating-point ((op '(#b000 #b100))))
2982 (and (not (fp-reg-tn-p source))
2983 (maybe-emit-rex-for-ea segment source nil))
2984 (emit-byte segment #b11011000)
2985 (emit-fp-op segment source #b100)))
2987 ;;; Subtract single, reverse:
2988 ;;; st(0) = memory or st(i) - st(0).
2989 (define-instruction fsubr (segment source)
2990 (:printer floating-point ((op '(#b000 #b101))))
2992 (and (not (fp-reg-tn-p source))
2993 (maybe-emit-rex-for-ea segment source nil))
2994 (emit-byte segment #b11011000)
2995 (emit-fp-op segment source #b101)))
2997 ;;; Subtract double:
2998 ;;; st(0) = st(0) - memory or st(i).
2999 (define-instruction fsubd (segment source)
3000 (:printer floating-point ((op '(#b100 #b100))))
3001 (:printer floating-point-fp ((op '(#b000 #b100))))
3003 (if (fp-reg-tn-p source)
3004 (emit-byte segment #b11011000)
3006 (and (not (fp-reg-tn-p source))
3007 (maybe-emit-rex-for-ea segment source nil))
3008 (emit-byte segment #b11011100)))
3009 (emit-fp-op segment source #b100)))
3011 ;;; Subtract double, reverse:
3012 ;;; st(0) = memory or st(i) - st(0).
3013 (define-instruction fsubrd (segment source)
3014 (:printer floating-point ((op '(#b100 #b101))))
3015 (:printer floating-point-fp ((op '(#b000 #b101))))
3017 (if (fp-reg-tn-p source)
3018 (emit-byte segment #b11011000)
3020 (and (not (fp-reg-tn-p source))
3021 (maybe-emit-rex-for-ea segment source nil))
3022 (emit-byte segment #b11011100)))
3023 (emit-fp-op segment source #b101)))
3025 ;;; Subtract double, destination st(i):
3026 ;;; st(i) = st(i) - st(0).
3028 ;;; ASM386 syntax: FSUB ST(i), ST
3029 ;;; Gdb syntax: fsubr %st,%st(i)
3030 (define-instruction fsub-sti (segment destination)
3031 (:printer floating-point-fp ((op '(#b100 #b101))))
3033 (aver (fp-reg-tn-p destination))
3034 (emit-byte segment #b11011100)
3035 (emit-fp-op segment destination #b101)))
3037 (define-instruction fsubp-sti (segment destination)
3038 (:printer floating-point-fp ((op '(#b110 #b101))))
3040 (aver (fp-reg-tn-p destination))
3041 (emit-byte segment #b11011110)
3042 (emit-fp-op segment destination #b101)))
3044 ;;; Subtract double, reverse, destination st(i):
3045 ;;; st(i) = st(0) - st(i).
3047 ;;; ASM386 syntax: FSUBR ST(i), ST
3048 ;;; Gdb syntax: fsub %st,%st(i)
3049 (define-instruction fsubr-sti (segment destination)
3050 (:printer floating-point-fp ((op '(#b100 #b100))))
3052 (aver (fp-reg-tn-p destination))
3053 (emit-byte segment #b11011100)
3054 (emit-fp-op segment destination #b100)))
3056 (define-instruction fsubrp-sti (segment destination)
3057 (:printer floating-point-fp ((op '(#b110 #b100))))
3059 (aver (fp-reg-tn-p destination))
3060 (emit-byte segment #b11011110)
3061 (emit-fp-op segment destination #b100)))
3063 ;;; Multiply single:
3064 ;;; st(0) = st(0) * memory or st(i).
3065 (define-instruction fmul (segment source)
3066 (:printer floating-point ((op '(#b000 #b001))))
3068 (and (not (fp-reg-tn-p source))
3069 (maybe-emit-rex-for-ea segment source nil))
3070 (emit-byte segment #b11011000)
3071 (emit-fp-op segment source #b001)))
3073 ;;; Multiply double:
3074 ;;; st(0) = st(0) * memory or st(i).
3075 (define-instruction fmuld (segment source)
3076 (:printer floating-point ((op '(#b100 #b001))))
3077 (:printer floating-point-fp ((op '(#b000 #b001))))
3079 (if (fp-reg-tn-p source)
3080 (emit-byte segment #b11011000)
3082 (and (not (fp-reg-tn-p source))
3083 (maybe-emit-rex-for-ea segment source nil))
3084 (emit-byte segment #b11011100)))
3085 (emit-fp-op segment source #b001)))
3087 ;;; Multiply double, destination st(i):
3088 ;;; st(i) = st(i) * st(0).
3089 (define-instruction fmul-sti (segment destination)
3090 (:printer floating-point-fp ((op '(#b100 #b001))))
3092 (aver (fp-reg-tn-p destination))
3093 (emit-byte segment #b11011100)
3094 (emit-fp-op segment destination #b001)))
3097 ;;; st(0) = st(0) / memory or st(i).
3098 (define-instruction fdiv (segment source)
3099 (:printer floating-point ((op '(#b000 #b110))))
3101 (and (not (fp-reg-tn-p source))
3102 (maybe-emit-rex-for-ea segment source nil))
3103 (emit-byte segment #b11011000)
3104 (emit-fp-op segment source #b110)))
3106 ;;; Divide single, reverse:
3107 ;;; st(0) = memory or st(i) / st(0).
3108 (define-instruction fdivr (segment source)
3109 (:printer floating-point ((op '(#b000 #b111))))
3111 (and (not (fp-reg-tn-p source))
3112 (maybe-emit-rex-for-ea segment source nil))
3113 (emit-byte segment #b11011000)
3114 (emit-fp-op segment source #b111)))
3117 ;;; st(0) = st(0) / memory or st(i).
3118 (define-instruction fdivd (segment source)
3119 (:printer floating-point ((op '(#b100 #b110))))
3120 (:printer floating-point-fp ((op '(#b000 #b110))))
3122 (if (fp-reg-tn-p source)
3123 (emit-byte segment #b11011000)
3125 (and (not (fp-reg-tn-p source))
3126 (maybe-emit-rex-for-ea segment source nil))
3127 (emit-byte segment #b11011100)))
3128 (emit-fp-op segment source #b110)))
3130 ;;; Divide double, reverse:
3131 ;;; st(0) = memory or st(i) / st(0).
3132 (define-instruction fdivrd (segment source)
3133 (:printer floating-point ((op '(#b100 #b111))))
3134 (:printer floating-point-fp ((op '(#b000 #b111))))
3136 (if (fp-reg-tn-p source)
3137 (emit-byte segment #b11011000)
3139 (and (not (fp-reg-tn-p source))
3140 (maybe-emit-rex-for-ea segment source nil))
3141 (emit-byte segment #b11011100)))
3142 (emit-fp-op segment source #b111)))
3144 ;;; Divide double, destination st(i):
3145 ;;; st(i) = st(i) / st(0).
3147 ;;; ASM386 syntax: FDIV ST(i), ST
3148 ;;; Gdb syntax: fdivr %st,%st(i)
3149 (define-instruction fdiv-sti (segment destination)
3150 (:printer floating-point-fp ((op '(#b100 #b111))))
3152 (aver (fp-reg-tn-p destination))
3153 (emit-byte segment #b11011100)
3154 (emit-fp-op segment destination #b111)))
3156 ;;; Divide double, reverse, destination st(i):
3157 ;;; st(i) = st(0) / st(i).
3159 ;;; ASM386 syntax: FDIVR ST(i), ST
3160 ;;; Gdb syntax: fdiv %st,%st(i)
3161 (define-instruction fdivr-sti (segment destination)
3162 (:printer floating-point-fp ((op '(#b100 #b110))))
3164 (aver (fp-reg-tn-p destination))
3165 (emit-byte segment #b11011100)
3166 (emit-fp-op segment destination #b110)))
3168 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
3169 (define-instruction fxch (segment source)
3170 (:printer floating-point-fp ((op '(#b001 #b001))))
3172 (unless (and (tn-p source)
3173 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
3175 (emit-byte segment #b11011001)
3176 (emit-fp-op segment source #b001)))
3178 ;;; Push 32-bit integer to st0.
3179 (define-instruction fild (segment source)
3180 (:printer floating-point ((op '(#b011 #b000))))
3182 (and (not (fp-reg-tn-p source))
3183 (maybe-emit-rex-for-ea segment source nil))
3184 (emit-byte segment #b11011011)
3185 (emit-fp-op segment source #b000)))
3187 ;;; Push 64-bit integer to st0.
3188 (define-instruction fildl (segment source)
3189 (:printer floating-point ((op '(#b111 #b101))))
3191 (and (not (fp-reg-tn-p source))
3192 (maybe-emit-rex-for-ea segment source nil))
3193 (emit-byte segment #b11011111)
3194 (emit-fp-op segment source #b101)))
3196 ;;; Store 32-bit integer.
3197 (define-instruction fist (segment dest)
3198 (:printer floating-point ((op '(#b011 #b010))))
3200 (and (not (fp-reg-tn-p dest))
3201 (maybe-emit-rex-for-ea segment dest nil))
3202 (emit-byte segment #b11011011)
3203 (emit-fp-op segment dest #b010)))
3205 ;;; Store and pop 32-bit integer.
3206 (define-instruction fistp (segment dest)
3207 (:printer floating-point ((op '(#b011 #b011))))
3209 (and (not (fp-reg-tn-p dest))
3210 (maybe-emit-rex-for-ea segment dest nil))
3211 (emit-byte segment #b11011011)
3212 (emit-fp-op segment dest #b011)))
3214 ;;; Store and pop 64-bit integer.
3215 (define-instruction fistpl (segment dest)
3216 (:printer floating-point ((op '(#b111 #b111))))
3218 (and (not (fp-reg-tn-p dest))
3219 (maybe-emit-rex-for-ea segment dest nil))
3220 (emit-byte segment #b11011111)
3221 (emit-fp-op segment dest #b111)))
3223 ;;; Store single from st(0) and pop.
3224 (define-instruction fstp (segment dest)
3225 (:printer floating-point ((op '(#b001 #b011))))
3227 (cond ((fp-reg-tn-p dest)
3228 (emit-byte segment #b11011101)
3229 (emit-fp-op segment dest #b011))
3231 (maybe-emit-rex-for-ea segment dest nil)
3232 (emit-byte segment #b11011001)
3233 (emit-fp-op segment dest #b011)))))
3235 ;;; Store double from st(0) and pop.
3236 (define-instruction fstpd (segment dest)
3237 (:printer floating-point ((op '(#b101 #b011))))
3238 (:printer floating-point-fp ((op '(#b101 #b011))))
3240 (cond ((fp-reg-tn-p dest)
3241 (emit-byte segment #b11011101)
3242 (emit-fp-op segment dest #b011))
3244 (maybe-emit-rex-for-ea segment dest nil)
3245 (emit-byte segment #b11011101)
3246 (emit-fp-op segment dest #b011)))))
3248 ;;; Store long from st(0) and pop.
3249 (define-instruction fstpl (segment dest)
3250 (:printer floating-point ((op '(#b011 #b111))))
3252 (and (not (fp-reg-tn-p dest))
3253 (maybe-emit-rex-for-ea segment dest nil))
3254 (emit-byte segment #b11011011)
3255 (emit-fp-op segment dest #b111)))
3257 ;;; Decrement stack-top pointer.
3258 (define-instruction fdecstp (segment)
3259 (:printer floating-point-no ((op #b10110)))
3261 (emit-byte segment #b11011001)
3262 (emit-byte segment #b11110110)))
3264 ;;; Increment stack-top pointer.
3265 (define-instruction fincstp (segment)
3266 (:printer floating-point-no ((op #b10111)))
3268 (emit-byte segment #b11011001)
3269 (emit-byte segment #b11110111)))
3271 ;;; Free fp register.
3272 (define-instruction ffree (segment dest)
3273 (:printer floating-point-fp ((op '(#b101 #b000))))
3275 (and (not (fp-reg-tn-p dest))
3276 (maybe-emit-rex-for-ea segment dest nil))
3277 (emit-byte segment #b11011101)
3278 (emit-fp-op segment dest #b000)))
3280 (define-instruction fabs (segment)
3281 (:printer floating-point-no ((op #b00001)))
3283 (emit-byte segment #b11011001)
3284 (emit-byte segment #b11100001)))
3286 (define-instruction fchs (segment)
3287 (:printer floating-point-no ((op #b00000)))
3289 (emit-byte segment #b11011001)
3290 (emit-byte segment #b11100000)))
3292 (define-instruction frndint(segment)
3293 (:printer floating-point-no ((op #b11100)))
3295 (emit-byte segment #b11011001)
3296 (emit-byte segment #b11111100)))
3299 (define-instruction fninit(segment)
3300 (:printer floating-point-5 ((op #b00011)))
3302 (emit-byte segment #b11011011)
3303 (emit-byte segment #b11100011)))
3305 ;;; Store Status Word to AX.
3306 (define-instruction fnstsw(segment)
3307 (:printer floating-point-st ((op #b00000)))
3309 (emit-byte segment #b11011111)
3310 (emit-byte segment #b11100000)))
3312 ;;; Load Control Word.
3314 ;;; src must be a memory location
3315 (define-instruction fldcw(segment src)
3316 (:printer floating-point ((op '(#b001 #b101))))
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 #b101)))
3323 ;;; Store Control Word.
3324 (define-instruction fnstcw(segment dst)
3325 (:printer floating-point ((op '(#b001 #b111))))
3327 (and (not (fp-reg-tn-p dst))
3328 (maybe-emit-rex-for-ea segment dst nil))
3329 (emit-byte segment #b11011001)
3330 (emit-fp-op segment dst #b111)))
3332 ;;; Store FP Environment.
3333 (define-instruction fstenv(segment dst)
3334 (:printer floating-point ((op '(#b001 #b110))))
3336 (and (not (fp-reg-tn-p dst))
3337 (maybe-emit-rex-for-ea segment dst nil))
3338 (emit-byte segment #b11011001)
3339 (emit-fp-op segment dst #b110)))
3341 ;;; Restore FP Environment.
3342 (define-instruction fldenv(segment src)
3343 (:printer floating-point ((op '(#b001 #b100))))
3345 (and (not (fp-reg-tn-p src))
3346 (maybe-emit-rex-for-ea segment src nil))
3347 (emit-byte segment #b11011001)
3348 (emit-fp-op segment src #b100)))
3351 (define-instruction fsave(segment dst)
3352 (:printer floating-point ((op '(#b101 #b110))))
3354 (and (not (fp-reg-tn-p dst))
3355 (maybe-emit-rex-for-ea segment dst nil))
3356 (emit-byte segment #b11011101)
3357 (emit-fp-op segment dst #b110)))
3359 ;;; Restore FP State.
3360 (define-instruction frstor(segment src)
3361 (:printer floating-point ((op '(#b101 #b100))))
3363 (and (not (fp-reg-tn-p src))
3364 (maybe-emit-rex-for-ea segment src nil))
3365 (emit-byte segment #b11011101)
3366 (emit-fp-op segment src #b100)))
3368 ;;; Clear exceptions.
3369 (define-instruction fnclex(segment)
3370 (:printer floating-point-5 ((op #b00010)))
3372 (emit-byte segment #b11011011)
3373 (emit-byte segment #b11100010)))
3376 (define-instruction fcom (segment src)
3377 (:printer floating-point ((op '(#b000 #b010))))
3379 (and (not (fp-reg-tn-p src))
3380 (maybe-emit-rex-for-ea segment src nil))
3381 (emit-byte segment #b11011000)
3382 (emit-fp-op segment src #b010)))
3384 (define-instruction fcomd (segment src)
3385 (:printer floating-point ((op '(#b100 #b010))))
3386 (:printer floating-point-fp ((op '(#b000 #b010))))
3388 (if (fp-reg-tn-p src)
3389 (emit-byte segment #b11011000)
3391 (maybe-emit-rex-for-ea segment src nil)
3392 (emit-byte segment #b11011100)))
3393 (emit-fp-op segment src #b010)))
3395 ;;; Compare ST1 to ST0, popping the stack twice.
3396 (define-instruction fcompp (segment)
3397 (:printer floating-point-3 ((op '(#b110 #b011001))))
3399 (emit-byte segment #b11011110)
3400 (emit-byte segment #b11011001)))
3402 ;;; unordered comparison
3403 (define-instruction fucom (segment src)
3404 (:printer floating-point-fp ((op '(#b101 #b100))))
3406 (aver (fp-reg-tn-p src))
3407 (emit-byte segment #b11011101)
3408 (emit-fp-op segment src #b100)))
3410 (define-instruction ftst (segment)
3411 (:printer floating-point-no ((op #b00100)))
3413 (emit-byte segment #b11011001)
3414 (emit-byte segment #b11100100)))
3418 (define-instruction fsqrt(segment)
3419 (:printer floating-point-no ((op #b11010)))
3421 (emit-byte segment #b11011001)
3422 (emit-byte segment #b11111010)))
3424 (define-instruction fscale(segment)
3425 (:printer floating-point-no ((op #b11101)))
3427 (emit-byte segment #b11011001)
3428 (emit-byte segment #b11111101)))
3430 (define-instruction fxtract(segment)
3431 (:printer floating-point-no ((op #b10100)))
3433 (emit-byte segment #b11011001)
3434 (emit-byte segment #b11110100)))
3436 (define-instruction fsin(segment)
3437 (:printer floating-point-no ((op #b11110)))
3439 (emit-byte segment #b11011001)
3440 (emit-byte segment #b11111110)))
3442 (define-instruction fcos(segment)
3443 (:printer floating-point-no ((op #b11111)))
3445 (emit-byte segment #b11011001)
3446 (emit-byte segment #b11111111)))
3448 (define-instruction fprem1(segment)
3449 (:printer floating-point-no ((op #b10101)))
3451 (emit-byte segment #b11011001)
3452 (emit-byte segment #b11110101)))
3454 (define-instruction fprem(segment)
3455 (:printer floating-point-no ((op #b11000)))
3457 (emit-byte segment #b11011001)
3458 (emit-byte segment #b11111000)))
3460 (define-instruction fxam (segment)
3461 (:printer floating-point-no ((op #b00101)))
3463 (emit-byte segment #b11011001)
3464 (emit-byte segment #b11100101)))
3466 ;;; These do push/pop to stack and need special handling
3467 ;;; in any VOPs that use them. See the book.
3469 ;;; st0 <- st1*log2(st0)
3470 (define-instruction fyl2x(segment) ; pops stack
3471 (:printer floating-point-no ((op #b10001)))
3473 (emit-byte segment #b11011001)
3474 (emit-byte segment #b11110001)))
3476 (define-instruction fyl2xp1(segment)
3477 (:printer floating-point-no ((op #b11001)))
3479 (emit-byte segment #b11011001)
3480 (emit-byte segment #b11111001)))
3482 (define-instruction f2xm1(segment)
3483 (:printer floating-point-no ((op #b10000)))
3485 (emit-byte segment #b11011001)
3486 (emit-byte segment #b11110000)))
3488 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
3489 (:printer floating-point-no ((op #b10010)))
3491 (emit-byte segment #b11011001)
3492 (emit-byte segment #b11110010)))
3494 (define-instruction fpatan(segment) ; POPS STACK
3495 (:printer floating-point-no ((op #b10011)))
3497 (emit-byte segment #b11011001)
3498 (emit-byte segment #b11110011)))
3500 ;;;; loading constants
3502 (define-instruction fldz(segment)
3503 (:printer floating-point-no ((op #b01110)))
3505 (emit-byte segment #b11011001)
3506 (emit-byte segment #b11101110)))
3508 (define-instruction fld1(segment)
3509 (:printer floating-point-no ((op #b01000)))
3511 (emit-byte segment #b11011001)
3512 (emit-byte segment #b11101000)))
3514 (define-instruction fldpi(segment)
3515 (:printer floating-point-no ((op #b01011)))
3517 (emit-byte segment #b11011001)
3518 (emit-byte segment #b11101011)))
3520 (define-instruction fldl2t(segment)
3521 (:printer floating-point-no ((op #b01001)))
3523 (emit-byte segment #b11011001)
3524 (emit-byte segment #b11101001)))
3526 (define-instruction fldl2e(segment)
3527 (:printer floating-point-no ((op #b01010)))
3529 (emit-byte segment #b11011001)
3530 (emit-byte segment #b11101010)))
3532 (define-instruction fldlg2(segment)
3533 (:printer floating-point-no ((op #b01100)))
3535 (emit-byte segment #b11011001)
3536 (emit-byte segment #b11101100)))
3538 (define-instruction fldln2(segment)
3539 (:printer floating-point-no ((op #b01101)))
3541 (emit-byte segment #b11011001)
3542 (emit-byte segment #b11101101)))
3544 ;;;; Instructions required to do floating point operations using SSE
3546 (defun emit-sse-inst (segment dst src prefix opcode &key operand-size)
3548 (emit-byte segment prefix))
3550 (maybe-emit-rex-for-ea segment src dst :operand-size operand-size)
3551 (maybe-emit-rex-for-ea segment src dst))
3552 (emit-byte segment #x0f)
3553 (emit-byte segment opcode)
3554 (emit-ea segment src (reg-tn-encoding dst)))
3556 ;;; Emit an SSE instruction that has an XMM register as the destination
3557 ;;; operand and for which the size of the operands is implicitly given
3558 ;;; by the instruction.
3559 (defun emit-regular-sse-inst (segment dst src prefix opcode)
3560 (aver (xmm-register-p dst))
3561 (emit-sse-inst segment dst src prefix opcode
3562 :operand-size :do-not-set))
3564 ;;; Instructions having an XMM register as the destination operand
3565 ;;; and an XMM register or a memory location as the source operand.
3566 ;;; The operand size is implicitly given by the instruction.
3568 (macrolet ((define-regular-sse-inst (name prefix opcode)
3569 `(define-instruction ,name (segment dst src)
3571 `((:printer ext-xmm-xmm/mem
3572 ((prefix ,prefix) (op ,opcode)))
3573 (:printer ext-rex-xmm-xmm/mem
3574 ((prefix ,prefix) (op ,opcode))))
3575 `((:printer xmm-xmm/mem ((op ,opcode)))
3576 (:printer rex-xmm-xmm/mem ((op ,opcode)))))
3578 (emit-regular-sse-inst segment dst src ,prefix ,opcode)))))
3580 (define-regular-sse-inst andpd #x66 #x54)
3581 (define-regular-sse-inst andps nil #x54)
3582 (define-regular-sse-inst xorpd #x66 #x57)
3583 (define-regular-sse-inst xorps nil #x57)
3585 (define-regular-sse-inst comisd #x66 #x2f)
3586 (define-regular-sse-inst comiss nil #x2f)
3588 (define-regular-sse-inst addsd #xf2 #x58)
3589 (define-regular-sse-inst addss #xf3 #x58)
3590 (define-regular-sse-inst divsd #xf2 #x5e)
3591 (define-regular-sse-inst divss #xf3 #x5e)
3592 (define-regular-sse-inst mulsd #xf2 #x59)
3593 (define-regular-sse-inst mulss #xf3 #x59)
3594 (define-regular-sse-inst subsd #xf2 #x5c)
3595 (define-regular-sse-inst subss #xf3 #x5c)
3596 (define-regular-sse-inst sqrtsd #xf2 #x51)
3597 (define-regular-sse-inst sqrtss #xf3 #x51)
3599 (define-regular-sse-inst cvtsd2ss #xf2 #x5a)
3600 (define-regular-sse-inst cvtss2sd #xf3 #x5a)
3601 (define-regular-sse-inst cvtdq2pd #xf3 #xe6)
3602 (define-regular-sse-inst cvtdq2ps nil #x5b))
3605 (macrolet ((define-movsd/ss-sse-inst (name prefix)
3606 `(define-instruction ,name (segment dst src)
3607 (:printer ext-xmm-xmm/mem-dir ((prefix ,prefix)
3609 (:printer ext-rex-xmm-xmm/mem-dir ((prefix ,prefix)
3612 (cond ((xmm-register-p dst)
3613 (emit-sse-inst segment dst src ,prefix #x10
3614 :operand-size :do-not-set))
3616 (aver (xmm-register-p src))
3617 (emit-sse-inst segment src dst ,prefix #x11
3618 :operand-size :do-not-set)))))))
3619 (define-movsd/ss-sse-inst movsd #xf2)
3620 (define-movsd/ss-sse-inst movss #xf3))
3623 (define-instruction movq (segment dst src)
3624 (:printer ext-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3625 (:printer ext-rex-xmm-xmm/mem ((prefix #xf3) (op #x7e)))
3626 (:printer ext-xmm-xmm/mem ((prefix #x66) (op #xd6))
3627 '(:name :tab reg/mem ", " reg))
3628 (:printer ext-rex-xmm-xmm/mem ((prefix #x66) (op #xd6))
3629 '(:name :tab reg/mem ", " reg))
3631 (cond ((xmm-register-p dst)
3632 (emit-sse-inst segment dst src #xf3 #x7e
3633 :operand-size :do-not-set))
3635 (aver (xmm-register-p src))
3636 (emit-sse-inst segment src dst #x66 #xd6
3637 :operand-size :do-not-set)))))
3639 ;;; Instructions having an XMM register as the destination operand
3640 ;;; and a general-purpose register or a memory location as the source
3641 ;;; operand. The operand size is calculated from the source operand.
3643 ;;; MOVD - Move a 32- or 64-bit value from a general-purpose register or
3644 ;;; a memory location to the low order 32 or 64 bits of an XMM register
3645 ;;; with zero extension or vice versa.
3646 ;;; We do not support the MMX version of this instruction.
3647 (define-instruction movd (segment dst src)
3648 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x6e)))
3649 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x6e)))
3650 (:printer ext-xmm-reg/mem ((prefix #x66) (op #x7e))
3651 '(:name :tab reg/mem ", " reg))
3652 (:printer ext-rex-xmm-reg/mem ((prefix #x66) (op #x7e))
3653 '(:name :tab reg/mem ", " reg))
3655 (cond ((xmm-register-p dst)
3656 (emit-sse-inst segment dst src #x66 #x6e))
3658 (aver (xmm-register-p src))
3659 (emit-sse-inst segment src dst #x66 #x7e)))))
3661 (macrolet ((define-integer-source-sse-inst (name prefix opcode)
3662 `(define-instruction ,name (segment dst src)
3663 (:printer ext-xmm-reg/mem ((prefix ,prefix) (op ,opcode)))
3664 (:printer ext-rex-xmm-reg/mem ((prefix ,prefix) (op ,opcode)))
3666 (aver (xmm-register-p dst))
3667 (let ((src-size (operand-size src)))
3668 (aver (or (eq src-size :qword) (eq src-size :dword))))
3669 (emit-sse-inst segment dst src ,prefix ,opcode)))))
3670 (define-integer-source-sse-inst cvtsi2sd #xf2 #x2a)
3671 (define-integer-source-sse-inst cvtsi2ss #xf3 #x2a))
3673 ;;; Instructions having a general-purpose register as the destination
3674 ;;; operand and an XMM register or a memory location as the source
3675 ;;; operand. The operand size is calculated from the destination
3678 (macrolet ((define-gpr-destination-sse-inst (name prefix opcode)
3679 `(define-instruction ,name (segment dst src)
3680 (:printer ext-reg-xmm/mem ((prefix ,prefix) (op ,opcode)))
3681 (:printer ext-rex-reg-xmm/mem ((prefix ,prefix) (op ,opcode)))
3683 (aver (register-p dst))
3684 (let ((dst-size (operand-size dst)))
3685 (aver (or (eq dst-size :qword) (eq dst-size :dword)))
3686 (emit-sse-inst segment dst src ,prefix ,opcode
3687 :operand-size dst-size))))))
3688 (define-gpr-destination-sse-inst cvtsd2si #xf2 #x2d)
3689 (define-gpr-destination-sse-inst cvtss2si #xf3 #x2d)
3690 (define-gpr-destination-sse-inst cvttsd2si #xf2 #x2c)
3691 (define-gpr-destination-sse-inst cvttss2si #xf3 #x2c))
3693 ;;; Other SSE instructions
3695 (define-instruction ldmxcsr (segment src)
3697 (emit-byte segment #x0f)
3698 (emit-byte segment #xae)
3699 (emit-ea segment src 2)))
3701 (define-instruction stmxcsr (segment dst)
3703 (emit-byte segment #x0f)
3704 (emit-byte segment #xae)
3705 (emit-ea segment dst 3)))