1 ;;;; that part of the description of the x86-64 instruction set
2 ;;;; which can live on the cross-compilation host
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
14 ;;; FIXME: SB!DISASSEM: prefixes are used so widely in this file that
15 ;;; I wonder whether the separation of the disassembler from the
16 ;;; virtual machine is valid or adds value.
18 ;;; Note: In CMU CL, this used to be a call to SET-DISASSEM-PARAMS.
19 (setf sb!disassem:*disassem-inst-alignment-bytes* 1)
21 ;;; This type is used mostly in disassembly and represents legacy
22 ;;; registers only. R8-R15 are handled separately.
23 (deftype reg () '(unsigned-byte 3))
25 ;;; This includes legacy registers and R8-R15.
26 (deftype full-reg () '(unsigned-byte 4))
28 ;;; Default word size for the chip: if the operand size /= :dword
29 ;;; we need to output #x66 (or REX) prefix
30 (def!constant +default-operand-size+ :dword)
32 ;;; The default address size for the chip. It could be overwritten
33 ;;; to :dword with a #x67 prefix, but this is never needed by SBCL
34 ;;; and thus not supported by this assembler/disassembler.
35 (def!constant +default-address-size+ :qword)
37 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
39 (defun offset-next (value dstate)
40 (declare (type integer value)
41 (type sb!disassem:disassem-state dstate))
42 (+ (sb!disassem:dstate-next-addr dstate) value))
44 (defparameter *byte-reg-names*
45 #(al cl dl bl spl bpl sil dil r8b r9b r10b r11b r12b r13b r14b r15b))
46 (defparameter *high-byte-reg-names*
48 (defparameter *word-reg-names*
49 #(ax cx dx bx sp bp si di r8w r9w r10w r11w r12w r13w r14w r15w))
50 (defparameter *dword-reg-names*
51 #(eax ecx edx ebx esp ebp esi edi r8d r9d r10d r11d r12d r13d r14d r15d))
52 (defparameter *qword-reg-names*
53 #(rax rcx rdx rbx rsp rbp rsi rdi r8 r9 r10 r11 r12 r13 r14 r15))
55 ;;; The printers for registers, memory references and immediates need to
56 ;;; take into account the width bit in the instruction, whether a #x66
57 ;;; or a REX prefix was issued, and the contents of the REX prefix.
58 ;;; This is implemented using prefilters to put flags into the slot
59 ;;; INST-PROPERTIES of the DSTATE. These flags are the following
62 ;;; OPERAND-SIZE-8 The width bit was zero
63 ;;; OPERAND-SIZE-16 The "operand size override" prefix (#x66) was found
64 ;;; REX A REX prefix was found
65 ;;; REX-W A REX prefix with the "operand width" bit set was
67 ;;; REX-R A REX prefix with the "register" bit set was found
68 ;;; REX-X A REX prefix with the "index" bit set was found
69 ;;; REX-B A REX prefix with the "base" bit set was found
71 ;;; Return the operand size depending on the prefixes and width bit as
73 (defun inst-operand-size (dstate)
74 (declare (type sb!disassem:disassem-state dstate))
75 (cond ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-8)
77 ((sb!disassem:dstate-get-inst-prop dstate 'rex-w)
79 ((sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
82 +default-operand-size+)))
84 ;;; The same as INST-OPERAND-SIZE, but for those instructions (e.g.
85 ;;; PUSH, JMP) that have a default operand size of :qword. It can only
86 ;;; be overwritten to :word.
87 (defun inst-operand-size-default-qword (dstate)
88 (declare (type sb!disassem:disassem-state dstate))
89 (if (sb!disassem:dstate-get-inst-prop dstate 'operand-size-16)
93 ;;; Print to STREAM the name of the general purpose register encoded by
94 ;;; VALUE and of size WIDTH. For robustness, the high byte registers
95 ;;; (AH, BH, CH, DH) are correctly detected, too, although the compiler
96 ;;; does not use them.
97 (defun print-reg-with-width (value width stream dstate)
98 (declare (type full-reg value)
100 (type sb!disassem:disassem-state dstate))
101 (princ (if (and (eq width :byte)
103 (not (sb!disassem:dstate-get-inst-prop dstate 'rex)))
104 (aref *high-byte-reg-names* (- value 4))
106 (:byte *byte-reg-names*)
107 (:word *word-reg-names*)
108 (:dword *dword-reg-names*)
109 (:qword *qword-reg-names*))
112 ;; XXX plus should do some source-var notes
115 (defun print-reg (value stream dstate)
116 (declare (type full-reg value)
118 (type sb!disassem:disassem-state dstate))
119 (print-reg-with-width value
120 (inst-operand-size dstate)
124 (defun print-reg-default-qword (value stream dstate)
125 (declare (type full-reg value)
127 (type sb!disassem:disassem-state dstate))
128 (print-reg-with-width value
129 (inst-operand-size-default-qword dstate)
133 (defun print-byte-reg (value stream dstate)
134 (declare (type full-reg value)
136 (type sb!disassem:disassem-state dstate))
137 (print-reg-with-width value :byte stream dstate))
139 (defun print-addr-reg (value stream dstate)
140 (declare (type full-reg value)
142 (type sb!disassem:disassem-state dstate))
143 (print-reg-with-width value +default-address-size+ stream dstate))
145 ;;; Print a register or a memory reference of the given WIDTH.
146 ;;; If SIZED-P is true, add an explicit size indicator for memory
148 (defun print-reg/mem-with-width (value width sized-p stream dstate)
149 (declare (type (or list full-reg) value)
150 (type (member :byte :word :dword :qword) width)
151 (type boolean sized-p)
153 (type sb!disassem:disassem-state dstate))
154 (if (typep value 'full-reg)
155 (print-reg-with-width value width stream dstate)
156 (print-mem-access value (and sized-p width) stream dstate)))
158 ;;; Print a register or a memory reference. The width is determined by
159 ;;; calling INST-OPERAND-SIZE.
160 (defun print-reg/mem (value stream dstate)
161 (declare (type (or list full-reg) value)
163 (type sb!disassem:disassem-state dstate))
164 (print-reg/mem-with-width
165 value (inst-operand-size dstate) nil stream dstate))
167 ;; Same as print-reg/mem, but prints an explicit size indicator for
168 ;; memory references.
169 (defun print-sized-reg/mem (value stream dstate)
170 (declare (type (or list full-reg) value)
172 (type sb!disassem:disassem-state dstate))
173 (print-reg/mem-with-width
174 value (inst-operand-size dstate) t stream dstate))
176 ;;; Same as print-sized-reg/mem, but with a default operand size of
178 (defun print-sized-reg/mem-default-qword (value stream dstate)
179 (declare (type (or list full-reg) value)
181 (type sb!disassem:disassem-state dstate))
182 (print-reg/mem-with-width
183 value (inst-operand-size-default-qword dstate) t stream dstate))
185 (defun print-sized-byte-reg/mem (value stream dstate)
186 (declare (type (or list full-reg) value)
188 (type sb!disassem:disassem-state dstate))
189 (print-reg/mem-with-width value :byte t stream dstate))
191 (defun print-sized-word-reg/mem (value stream dstate)
192 (declare (type (or list full-reg) value)
194 (type sb!disassem:disassem-state dstate))
195 (print-reg/mem-with-width value :word t stream dstate))
197 (defun print-sized-dword-reg/mem (value stream dstate)
198 (declare (type (or list full-reg) value)
200 (type sb!disassem:disassem-state dstate))
201 (print-reg/mem-with-width value :dword t stream dstate))
203 (defun print-label (value stream dstate)
204 (declare (ignore dstate))
205 (sb!disassem:princ16 value stream))
207 ;;; This prefilter is used solely for its side effects, namely to put
208 ;;; the bits found in the REX prefix into the DSTATE for use by other
209 ;;; prefilters and by printers.
210 (defun prefilter-wrxb (value dstate)
211 (declare (type (unsigned-byte 4) value)
212 (type sb!disassem:disassem-state dstate))
213 (sb!disassem:dstate-put-inst-prop dstate 'rex)
214 (when (plusp (logand value #b1000))
215 (sb!disassem:dstate-put-inst-prop dstate 'rex-w))
216 (when (plusp (logand value #b0100))
217 (sb!disassem:dstate-put-inst-prop dstate 'rex-r))
218 (when (plusp (logand value #b0010))
219 (sb!disassem:dstate-put-inst-prop dstate 'rex-x))
220 (when (plusp (logand value #b0001))
221 (sb!disassem:dstate-put-inst-prop dstate 'rex-b))
224 ;;; This prefilter is used solely for its side effect, namely to put
225 ;;; the property OPERAND-SIZE-8 into the DSTATE if VALUE is 0.
226 (defun prefilter-width (value dstate)
227 (declare (type bit value)
228 (type sb!disassem:disassem-state dstate))
230 (sb!disassem:dstate-put-inst-prop dstate 'operand-size-8))
233 ;;; A register field that can be extended by REX.R.
234 (defun prefilter-reg-r (value dstate)
235 (declare (type reg value)
236 (type sb!disassem:disassem-state dstate))
237 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-r)
241 ;;; A register field that can be extended by REX.B.
242 (defun prefilter-reg-b (value dstate)
243 (declare (type reg value)
244 (type sb!disassem:disassem-state dstate))
245 (if (sb!disassem::dstate-get-inst-prop dstate 'rex-b)
249 ;;; Returns either an integer, meaning a register, or a list of
250 ;;; (BASE-REG OFFSET INDEX-REG INDEX-SCALE), where any component
251 ;;; may be missing or nil to indicate that it's not used or has the
252 ;;; obvious default value (e.g., 1 for the index-scale). VALUE is a list
253 ;;; of the mod and r/m field of the ModRM byte of the instruction.
254 ;;; Depending on VALUE a SIB byte and/or an offset may be read. The
255 ;;; REX.B bit from DSTATE is used to extend the sole register or the
256 ;;; BASE-REG to a full register, the REX.X bit does the same for the
258 (defun prefilter-reg/mem (value dstate)
259 (declare (type list value)
260 (type sb!disassem:disassem-state dstate))
261 (let ((mod (first value))
262 (r/m (second value)))
263 (declare (type (unsigned-byte 2) mod)
264 (type (unsigned-byte 3) r/m))
265 (let ((full-reg (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
268 (declare (type full-reg full-reg))
274 (let ((sib (sb!disassem:read-suffix 8 dstate)))
275 (declare (type (unsigned-byte 8) sib))
276 (let ((base-reg (ldb (byte 3 0) sib))
277 (index-reg (ldb (byte 3 3) sib))
278 (index-scale (ldb (byte 2 6) sib)))
279 (declare (type (unsigned-byte 3) base-reg index-reg)
280 (type (unsigned-byte 2) index-scale))
284 (if (= base-reg #b101)
285 (sb!disassem:read-signed-suffix 32 dstate)
288 (sb!disassem:read-signed-suffix 8 dstate))
290 (sb!disassem:read-signed-suffix 32 dstate)))))
291 (list (unless (and (= mod #b00) (= base-reg #b101))
292 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-b)
296 (unless (= index-reg #b100)
297 (if (sb!disassem:dstate-get-inst-prop dstate 'rex-x)
300 (ash 1 index-scale))))))
301 ((and (= mod #b00) (= r/m #b101))
302 (list 'rip (sb!disassem:read-signed-suffix 32 dstate)) )
306 (list full-reg (sb!disassem:read-signed-suffix 8 dstate)))
308 (list full-reg (sb!disassem:read-signed-suffix 32 dstate)))))))
310 (defun read-address (value dstate)
311 (declare (ignore value)) ; always nil anyway
312 (sb!disassem:read-suffix (width-bits (inst-operand-size dstate)) dstate))
314 (defun width-bits (width)
325 ;;;; disassembler argument types
327 ;;; Used to capture the lower four bits of the REX prefix.
328 (sb!disassem:define-arg-type wrxb
329 :prefilter #'prefilter-wrxb)
331 (sb!disassem:define-arg-type width
332 :prefilter #'prefilter-width
333 :printer (lambda (value stream dstate)
334 (declare (ignore value))
335 (princ (schar (symbol-name (inst-operand-size dstate)) 0)
338 (sb!disassem:define-arg-type displacement
340 :use-label #'offset-next
341 :printer (lambda (value stream dstate)
342 (sb!disassem:maybe-note-assembler-routine value nil dstate)
343 (print-label value stream dstate)))
345 (sb!disassem:define-arg-type accum
346 :printer (lambda (value stream dstate)
347 (declare (ignore value)
349 (type sb!disassem:disassem-state dstate))
350 (print-reg 0 stream dstate)))
352 (sb!disassem:define-arg-type reg
353 :prefilter #'prefilter-reg-r
354 :printer #'print-reg)
356 (sb!disassem:define-arg-type reg-b
357 :prefilter #'prefilter-reg-b
358 :printer #'print-reg)
360 (sb!disassem:define-arg-type reg-b-default-qword
361 :prefilter #'prefilter-reg-b
362 :printer #'print-reg-default-qword)
364 (sb!disassem:define-arg-type imm-addr
365 :prefilter #'read-address
366 :printer #'print-label)
368 ;;; Normally, immediate values for an operand size of :qword are of size
369 ;;; :dword and are sign-extended to 64 bits. For an exception, see the
370 ;;; argument type definition following this one.
371 (sb!disassem:define-arg-type signed-imm-data
372 :prefilter (lambda (value dstate)
373 (declare (ignore value)) ; always nil anyway
374 (let ((width (width-bits (inst-operand-size dstate))))
377 (sb!disassem:read-signed-suffix width dstate))))
379 ;;; Used by the variant of the MOV instruction with opcode B8 which can
380 ;;; move immediates of all sizes (i.e. including :qword) into a
382 (sb!disassem:define-arg-type signed-imm-data-upto-qword
383 :prefilter (lambda (value dstate)
384 (declare (ignore value)) ; always nil anyway
385 (sb!disassem:read-signed-suffix
386 (width-bits (inst-operand-size dstate))
389 ;;; Used by those instructions that have a default operand size of
390 ;;; :qword. Nevertheless the immediate is at most of size :dword.
391 ;;; The only instruction of this kind having a variant with an immediate
392 ;;; argument is PUSH.
393 (sb!disassem:define-arg-type signed-imm-data-default-qword
394 :prefilter (lambda (value dstate)
395 (declare (ignore value)) ; always nil anyway
396 (let ((width (width-bits
397 (inst-operand-size-default-qword dstate))))
400 (sb!disassem:read-signed-suffix width dstate))))
402 (sb!disassem:define-arg-type signed-imm-byte
403 :prefilter (lambda (value dstate)
404 (declare (ignore value)) ; always nil anyway
405 (sb!disassem:read-signed-suffix 8 dstate)))
407 (sb!disassem:define-arg-type imm-byte
408 :prefilter (lambda (value dstate)
409 (declare (ignore value)) ; always nil anyway
410 (sb!disassem:read-suffix 8 dstate)))
412 ;;; needed for the ret imm16 instruction
413 (sb!disassem:define-arg-type imm-word-16
414 :prefilter (lambda (value dstate)
415 (declare (ignore value)) ; always nil anyway
416 (sb!disassem:read-suffix 16 dstate)))
418 (sb!disassem:define-arg-type reg/mem
419 :prefilter #'prefilter-reg/mem
420 :printer #'print-reg/mem)
421 (sb!disassem:define-arg-type sized-reg/mem
422 ;; Same as reg/mem, but prints an explicit size indicator for
423 ;; memory references.
424 :prefilter #'prefilter-reg/mem
425 :printer #'print-sized-reg/mem)
427 ;;; Arguments of type reg/mem with a fixed size.
428 (sb!disassem:define-arg-type sized-byte-reg/mem
429 :prefilter #'prefilter-reg/mem
430 :printer #'print-sized-byte-reg/mem)
431 (sb!disassem:define-arg-type sized-word-reg/mem
432 :prefilter #'prefilter-reg/mem
433 :printer #'print-sized-word-reg/mem)
434 (sb!disassem:define-arg-type sized-dword-reg/mem
435 :prefilter #'prefilter-reg/mem
436 :printer #'print-sized-dword-reg/mem)
438 ;;; Same as sized-reg/mem, but with a default operand size of :qword.
439 (sb!disassem:define-arg-type sized-reg/mem-default-qword
440 :prefilter #'prefilter-reg/mem
441 :printer #'print-sized-reg/mem-default-qword)
444 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
445 (defun print-fp-reg (value stream dstate)
446 (declare (ignore dstate))
447 (format stream "FR~D" value))
448 (defun prefilter-fp-reg (value dstate)
450 (declare (ignore dstate))
453 (sb!disassem:define-arg-type fp-reg
454 :prefilter #'prefilter-fp-reg
455 :printer #'print-fp-reg)
457 (eval-when (:compile-toplevel :load-toplevel :execute)
458 (defparameter *conditions*
461 (:b . 2) (:nae . 2) (:c . 2)
462 (:nb . 3) (:ae . 3) (:nc . 3)
463 (:eq . 4) (:e . 4) (:z . 4)
470 (:np . 11) (:po . 11)
471 (:l . 12) (:nge . 12)
472 (:nl . 13) (:ge . 13)
473 (:le . 14) (:ng . 14)
474 (:nle . 15) (:g . 15)))
475 (defparameter *condition-name-vec*
476 (let ((vec (make-array 16 :initial-element nil)))
477 (dolist (cond *conditions*)
478 (when (null (aref vec (cdr cond)))
479 (setf (aref vec (cdr cond)) (car cond))))
483 ;;; Set assembler parameters. (In CMU CL, this was done with
484 ;;; a call to a macro DEF-ASSEMBLER-PARAMS.)
485 (eval-when (:compile-toplevel :load-toplevel :execute)
486 (setf sb!assem:*assem-scheduler-p* nil))
488 (sb!disassem:define-arg-type condition-code
489 :printer *condition-name-vec*)
491 (defun conditional-opcode (condition)
492 (cdr (assoc condition *conditions* :test #'eq)))
494 ;;;; disassembler instruction formats
496 (eval-when (:compile-toplevel :execute)
497 (defun swap-if (direction field1 separator field2)
498 `(:if (,direction :constant 0)
499 (,field1 ,separator ,field2)
500 (,field2 ,separator ,field1))))
502 (sb!disassem:define-instruction-format (byte 8 :default-printer '(:name))
503 (op :field (byte 8 0))
508 ;;; A one-byte instruction with a #x66 prefix, used to indicate an
509 ;;; operand size of :word.
510 (sb!disassem:define-instruction-format (x66-byte 16
511 :default-printer '(:name))
512 (x66 :field (byte 8 0) :value #x66)
513 (op :field (byte 8 8)))
515 ;;; A one-byte instruction with a REX prefix, used to indicate an
516 ;;; operand size of :qword. REX.W must be 1, the other three bits are
518 (sb!disassem:define-instruction-format (rex-byte 16
519 :default-printer '(:name))
520 (rex :field (byte 5 3) :value #b01001)
521 (op :field (byte 8 8)))
523 (sb!disassem:define-instruction-format (simple 8)
524 (op :field (byte 7 1))
525 (width :field (byte 1 0) :type 'width)
530 (sb!disassem:define-instruction-format (rex-simple 16)
531 (rex :field (byte 4 4) :value #b0100)
532 (wrxb :field (byte 4 0) :type 'wrxb)
533 (op :field (byte 7 9))
534 (width :field (byte 1 8) :type 'width)
539 ;;; Same as simple, but with direction bit
540 (sb!disassem:define-instruction-format (simple-dir 8 :include 'simple)
541 (op :field (byte 6 2))
542 (dir :field (byte 1 1)))
544 ;;; Same as simple, but with the immediate value occurring by default,
545 ;;; and with an appropiate printer.
546 (sb!disassem:define-instruction-format (accum-imm 8
548 :default-printer '(:name
549 :tab accum ", " imm))
550 (imm :type 'signed-imm-data))
552 (sb!disassem:define-instruction-format (rex-accum-imm 16
554 :default-printer '(:name
555 :tab accum ", " imm))
556 (imm :type 'signed-imm-data))
558 (sb!disassem:define-instruction-format (reg-no-width 8
559 :default-printer '(:name :tab reg))
560 (op :field (byte 5 3))
561 (reg :field (byte 3 0) :type 'reg-b)
566 (sb!disassem:define-instruction-format (rex-reg-no-width 16
567 :default-printer '(:name :tab reg))
568 (rex :field (byte 4 4) :value #b0100)
569 (wrxb :field (byte 4 0) :type 'wrxb)
570 (op :field (byte 5 11))
571 (reg :field (byte 3 8) :type 'reg-b)
576 ;;; Same as reg-no-width, but with a default operand size of :qword.
577 (sb!disassem:define-instruction-format (reg-no-width-default-qword 8
578 :include 'reg-no-width
579 :default-printer '(:name :tab reg))
580 (reg :type 'reg-b-default-qword))
582 ;;; Same as rex-reg-no-width, but with a default operand size of :qword.
583 (sb!disassem:define-instruction-format (rex-reg-no-width-default-qword 16
584 :include 'rex-reg-no-width
585 :default-printer '(:name :tab reg))
586 (reg :type 'reg-b-default-qword))
588 (sb!disassem:define-instruction-format (modrm-reg-no-width 24
589 :default-printer '(:name :tab reg))
590 (rex :field (byte 4 4) :value #b0100)
591 (wrxb :field (byte 4 0) :type 'wrxb)
592 (ff :field (byte 8 8) :value #b11111111)
593 (mod :field (byte 2 22))
594 (modrm-reg :field (byte 3 19))
595 (reg :field (byte 3 16) :type 'reg-b)
600 ;;; Adds a width field to reg-no-width. Note that we can't use
601 ;;; :INCLUDE 'REG-NO-WIDTH here to save typing because that would put
602 ;;; the WIDTH field last, but the prefilter for WIDTH must run before
603 ;;; the one for IMM to be able to determine the correct size of IMM.
604 (sb!disassem:define-instruction-format (reg 8
605 :default-printer '(:name :tab reg))
606 (op :field (byte 4 4))
607 (width :field (byte 1 3) :type 'width)
608 (reg :field (byte 3 0) :type 'reg-b)
613 (sb!disassem:define-instruction-format (rex-reg 16
614 :default-printer '(:name :tab reg))
615 (rex :field (byte 4 4) :value #b0100)
616 (wrxb :field (byte 4 0) :type 'wrxb)
617 (width :field (byte 1 11) :type 'width)
618 (op :field (byte 4 12))
619 (reg :field (byte 3 8) :type 'reg-b)
624 (sb!disassem:define-instruction-format (two-bytes 16
625 :default-printer '(:name))
626 (op :fields (list (byte 8 0) (byte 8 8))))
628 (sb!disassem:define-instruction-format (reg-reg/mem 16
630 `(:name :tab reg ", " reg/mem))
631 (op :field (byte 7 1))
632 (width :field (byte 1 0) :type 'width)
633 (reg/mem :fields (list (byte 2 14) (byte 3 8))
635 (reg :field (byte 3 11) :type 'reg)
639 (sb!disassem:define-instruction-format (rex-reg-reg/mem 24
641 `(:name :tab reg ", " reg/mem))
642 (rex :field (byte 4 4) :value #b0100)
643 (wrxb :field (byte 4 0) :type 'wrxb)
644 (width :field (byte 1 8) :type 'width)
645 (op :field (byte 7 9))
646 (reg/mem :fields (list (byte 2 22) (byte 3 16))
648 (reg :field (byte 3 19) :type 'reg)
652 ;;; same as reg-reg/mem, but with direction bit
653 (sb!disassem:define-instruction-format (reg-reg/mem-dir 16
654 :include 'reg-reg/mem
658 ,(swap-if 'dir 'reg/mem ", " 'reg)))
659 (op :field (byte 6 2))
660 (dir :field (byte 1 1)))
662 (sb!disassem:define-instruction-format (rex-reg-reg/mem-dir 24
663 :include 'rex-reg-reg/mem
667 ,(swap-if 'dir 'reg/mem ", " 'reg)))
668 (op :field (byte 6 10))
669 (dir :field (byte 1 9)))
671 ;;; Same as reg-reg/mem, but uses the reg field as a second op code.
672 (sb!disassem:define-instruction-format (reg/mem 16
673 :default-printer '(:name :tab reg/mem))
674 (op :fields (list (byte 7 1) (byte 3 11)))
675 (width :field (byte 1 0) :type 'width)
676 (reg/mem :fields (list (byte 2 14) (byte 3 8))
677 :type 'sized-reg/mem)
681 (sb!disassem:define-instruction-format (rex-reg/mem 24
682 :default-printer '(:name :tab reg/mem))
683 (rex :field (byte 4 4) :value #b0100)
684 (wrxb :field (byte 4 0) :type 'wrxb)
685 (op :fields (list (byte 7 9) (byte 3 19)))
686 (width :field (byte 1 8) :type 'width)
687 (reg/mem :fields (list (byte 2 22) (byte 3 16))
688 :type 'sized-reg/mem)
692 ;;; Same as reg/mem, but without a width field and with a default
693 ;;; operand size of :qword.
694 (sb!disassem:define-instruction-format (reg/mem-default-qword 16
695 :default-printer '(:name :tab reg/mem))
696 (op :fields (list (byte 8 0) (byte 3 11)))
697 (reg/mem :fields (list (byte 2 14) (byte 3 8))
698 :type 'sized-reg/mem-default-qword))
700 (sb!disassem:define-instruction-format (rex-reg/mem-default-qword 24
701 :default-printer '(:name :tab reg/mem))
702 (rex :field (byte 4 4) :value #b0100)
703 (wrxb :field (byte 4 0) :type 'wrxb)
704 (op :fields (list (byte 8 8) (byte 3 19)))
705 (reg/mem :fields (list (byte 2 22) (byte 3 16))
706 :type 'sized-reg/mem-default-qword))
708 ;;; Same as reg/mem, but with the immediate value occurring by default,
709 ;;; and with an appropiate printer.
710 (sb!disassem:define-instruction-format (reg/mem-imm 16
713 '(:name :tab reg/mem ", " imm))
714 (reg/mem :type 'sized-reg/mem)
715 (imm :type 'signed-imm-data))
717 (sb!disassem:define-instruction-format (rex-reg/mem-imm 24
718 :include 'rex-reg/mem
720 '(:name :tab reg/mem ", " imm))
721 (reg/mem :type 'sized-reg/mem)
722 (imm :type 'signed-imm-data))
724 ;;; Same as reg/mem, but with using the accumulator in the default printer
725 (sb!disassem:define-instruction-format
727 :include 'reg/mem :default-printer '(:name :tab accum ", " reg/mem))
728 (reg/mem :type 'reg/mem) ; don't need a size
729 (accum :type 'accum))
731 (sb!disassem:define-instruction-format (rex-accum-reg/mem 24
732 :include 'rex-reg/mem
734 '(:name :tab accum ", " reg/mem))
735 (reg/mem :type 'reg/mem) ; don't need a size
736 (accum :type 'accum))
738 ;;; Same as reg-reg/mem, but with a prefix of #b00001111
739 (sb!disassem:define-instruction-format (ext-reg-reg/mem 24
741 `(:name :tab reg ", " reg/mem))
742 (prefix :field (byte 8 0) :value #b00001111)
743 (op :field (byte 7 9))
744 (width :field (byte 1 8) :type 'width)
745 (reg/mem :fields (list (byte 2 22) (byte 3 16))
747 (reg :field (byte 3 19) :type 'reg)
751 (sb!disassem:define-instruction-format (ext-reg-reg/mem-no-width 24
753 `(:name :tab reg ", " reg/mem))
754 (prefix :field (byte 8 0) :value #b00001111)
755 (op :field (byte 8 8))
756 (reg/mem :fields (list (byte 2 22) (byte 3 16))
758 (reg :field (byte 3 19) :type 'reg))
760 (sb!disassem:define-instruction-format (rex-ext-reg-reg/mem-no-width 32
762 `(:name :tab reg ", " reg/mem))
763 (rex :field (byte 4 4) :value #b0100)
764 (wrxb :field (byte 4 0) :type 'wrxb)
765 (prefix :field (byte 8 8) :value #b00001111)
766 (op :field (byte 8 16))
767 (reg/mem :fields (list (byte 2 30) (byte 3 24))
769 (reg :field (byte 3 27) :type 'reg))
771 ;;; Same as reg-reg/mem, but with a prefix of #xf2 0f
772 (sb!disassem:define-instruction-format (xmm-ext-reg-reg/mem 32
774 `(:name :tab reg ", " reg/mem))
775 (prefix :field (byte 8 0) :value #xf2)
776 (prefix2 :field (byte 8 8) :value #x0f)
777 (op :field (byte 7 17))
778 (width :field (byte 1 16) :type 'width)
779 (reg/mem :fields (list (byte 2 30) (byte 3 24))
781 (reg :field (byte 3 27) :type 'reg)
785 ;;; reg-no-width with #x0f prefix
786 (sb!disassem:define-instruction-format (ext-reg-no-width 16
787 :default-printer '(:name :tab reg))
788 (prefix :field (byte 8 0) :value #b00001111)
789 (op :field (byte 5 11))
790 (reg :field (byte 3 8) :type 'reg-b))
792 ;;; Same as reg/mem, but with a prefix of #b00001111
793 (sb!disassem:define-instruction-format (ext-reg/mem 24
794 :default-printer '(:name :tab reg/mem))
795 (prefix :field (byte 8 0) :value #b00001111)
796 (op :fields (list (byte 7 9) (byte 3 19)))
797 (width :field (byte 1 8) :type 'width)
798 (reg/mem :fields (list (byte 2 22) (byte 3 16))
799 :type 'sized-reg/mem)
803 (sb!disassem:define-instruction-format (ext-reg/mem-imm 24
804 :include 'ext-reg/mem
806 '(:name :tab reg/mem ", " imm))
807 (imm :type 'signed-imm-data))
809 ;;;; This section was added by jrd, for fp instructions.
811 ;;; regular fp inst to/from registers/memory
812 (sb!disassem:define-instruction-format (floating-point 16
814 `(:name :tab reg/mem))
815 (prefix :field (byte 5 3) :value #b11011)
816 (op :fields (list (byte 3 0) (byte 3 11)))
817 (reg/mem :fields (list (byte 2 14) (byte 3 8)) :type 'reg/mem))
819 ;;; fp insn to/from fp reg
820 (sb!disassem:define-instruction-format (floating-point-fp 16
821 :default-printer `(:name :tab fp-reg))
822 (prefix :field (byte 5 3) :value #b11011)
823 (suffix :field (byte 2 14) :value #b11)
824 (op :fields (list (byte 3 0) (byte 3 11)))
825 (fp-reg :field (byte 3 8) :type 'fp-reg))
827 ;;; fp insn to/from fp reg, with the reversed source/destination flag.
828 (sb!disassem:define-instruction-format
829 (floating-point-fp-d 16
830 :default-printer `(:name :tab ,(swap-if 'd "ST0" ", " 'fp-reg)))
831 (prefix :field (byte 5 3) :value #b11011)
832 (suffix :field (byte 2 14) :value #b11)
833 (op :fields (list (byte 2 0) (byte 3 11)))
834 (d :field (byte 1 2))
835 (fp-reg :field (byte 3 8) :type 'fp-reg))
838 ;;; (added by (?) pfw)
839 ;;; fp no operand isns
840 (sb!disassem:define-instruction-format (floating-point-no 16
841 :default-printer '(:name))
842 (prefix :field (byte 8 0) :value #b11011001)
843 (suffix :field (byte 3 13) :value #b111)
844 (op :field (byte 5 8)))
846 (sb!disassem:define-instruction-format (floating-point-3 16
847 :default-printer '(:name))
848 (prefix :field (byte 5 3) :value #b11011)
849 (suffix :field (byte 2 14) :value #b11)
850 (op :fields (list (byte 3 0) (byte 6 8))))
852 (sb!disassem:define-instruction-format (floating-point-5 16
853 :default-printer '(:name))
854 (prefix :field (byte 8 0) :value #b11011011)
855 (suffix :field (byte 3 13) :value #b111)
856 (op :field (byte 5 8)))
858 (sb!disassem:define-instruction-format (floating-point-st 16
859 :default-printer '(:name))
860 (prefix :field (byte 8 0) :value #b11011111)
861 (suffix :field (byte 3 13) :value #b111)
862 (op :field (byte 5 8)))
864 (sb!disassem:define-instruction-format (string-op 8
866 :default-printer '(:name width)))
868 (sb!disassem:define-instruction-format (rex-string-op 16
870 :default-printer '(:name width)))
872 (sb!disassem:define-instruction-format (short-cond-jump 16)
873 (op :field (byte 4 4))
874 (cc :field (byte 4 0) :type 'condition-code)
875 (label :field (byte 8 8) :type 'displacement))
877 (sb!disassem:define-instruction-format (short-jump 16
878 :default-printer '(:name :tab label))
879 (const :field (byte 4 4) :value #b1110)
880 (op :field (byte 4 0))
881 (label :field (byte 8 8) :type 'displacement))
883 (sb!disassem:define-instruction-format (near-cond-jump 16)
884 (op :fields (list (byte 8 0) (byte 4 12)) :value '(#b00001111 #b1000))
885 (cc :field (byte 4 8) :type 'condition-code)
886 ;; The disassembler currently doesn't let you have an instruction > 32 bits
887 ;; long, so we fake it by using a prefilter to read the offset.
888 (label :type 'displacement
889 :prefilter (lambda (value dstate)
890 (declare (ignore value)) ; always nil anyway
891 (sb!disassem:read-signed-suffix 32 dstate))))
893 (sb!disassem:define-instruction-format (near-jump 8
894 :default-printer '(:name :tab label))
895 (op :field (byte 8 0))
896 ;; The disassembler currently doesn't let you have an instruction > 32 bits
897 ;; long, so we fake it by using a prefilter to read the address.
898 (label :type 'displacement
899 :prefilter (lambda (value dstate)
900 (declare (ignore value)) ; always nil anyway
901 (sb!disassem:read-signed-suffix 32 dstate))))
904 (sb!disassem:define-instruction-format (cond-set 24
905 :default-printer '('set cc :tab reg/mem))
906 (prefix :field (byte 8 0) :value #b00001111)
907 (op :field (byte 4 12) :value #b1001)
908 (cc :field (byte 4 8) :type 'condition-code)
909 (reg/mem :fields (list (byte 2 22) (byte 3 16))
910 :type 'sized-byte-reg/mem)
911 (reg :field (byte 3 19) :value #b000))
913 (sb!disassem:define-instruction-format (cond-move 24
915 '('cmov cc :tab reg ", " reg/mem))
916 (prefix :field (byte 8 0) :value #b00001111)
917 (op :field (byte 4 12) :value #b0100)
918 (cc :field (byte 4 8) :type 'condition-code)
919 (reg/mem :fields (list (byte 2 22) (byte 3 16))
921 (reg :field (byte 3 19) :type 'reg))
923 (sb!disassem:define-instruction-format (rex-cond-move 32
925 '('cmov cc :tab reg ", " reg/mem))
926 (rex :field (byte 4 4) :value #b0100)
927 (wrxb :field (byte 4 0) :type 'wrxb)
928 (prefix :field (byte 8 8) :value #b00001111)
929 (op :field (byte 4 20) :value #b0100)
930 (cc :field (byte 4 16) :type 'condition-code)
931 (reg/mem :fields (list (byte 2 30) (byte 3 24))
933 (reg :field (byte 3 27) :type 'reg))
935 (sb!disassem:define-instruction-format (enter-format 32
936 :default-printer '(:name
938 (:unless (:constant 0)
940 (op :field (byte 8 0))
941 (disp :field (byte 16 8))
942 (level :field (byte 8 24)))
944 ;;; Single byte instruction with an immediate byte argument.
945 (sb!disassem:define-instruction-format (byte-imm 16
946 :default-printer '(:name :tab code))
947 (op :field (byte 8 0))
948 (code :field (byte 8 8)))
950 ;;;; primitive emitters
952 (define-bitfield-emitter emit-word 16
955 (define-bitfield-emitter emit-dword 32
958 (define-bitfield-emitter emit-qword 64
961 (define-bitfield-emitter emit-byte-with-reg 8
962 (byte 5 3) (byte 3 0))
964 (define-bitfield-emitter emit-mod-reg-r/m-byte 8
965 (byte 2 6) (byte 3 3) (byte 3 0))
967 (define-bitfield-emitter emit-sib-byte 8
968 (byte 2 6) (byte 3 3) (byte 3 0))
970 (define-bitfield-emitter emit-rex-byte 8
971 (byte 4 4) (byte 1 3) (byte 1 2) (byte 1 1) (byte 1 0))
977 (defun emit-absolute-fixup (segment fixup &optional quad-p)
978 (note-fixup segment (if quad-p :absolute64 :absolute) fixup)
979 (let ((offset (fixup-offset fixup)))
981 (emit-back-patch segment
983 (lambda (segment posn)
984 (declare (ignore posn))
985 (let ((val (- (+ (component-header-length)
986 (or (label-position offset)
988 other-pointer-lowtag)))
990 (emit-qword segment val )
991 (emit-dword segment val )))))
993 (emit-qword segment (or offset 0))
994 (emit-dword segment (or offset 0))))))
996 (defun emit-relative-fixup (segment fixup)
997 (note-fixup segment :relative fixup)
998 (emit-dword segment (or (fixup-offset fixup) 0)))
1001 ;;;; the effective-address (ea) structure
1003 (defun reg-tn-encoding (tn)
1004 (declare (type tn tn))
1005 (aver (member (sb-name (sc-sb (tn-sc tn))) '(registers float-registers)))
1006 ;; ea only has space for three bits of register number: regs r8
1007 ;; and up are selected by a REX prefix byte which caller is responsible
1008 ;; for having emitted where necessary already
1009 (cond ((fp-reg-tn-p tn)
1010 (mod (tn-offset tn) 8))
1012 (let ((offset (mod (tn-offset tn) 16)))
1013 (logior (ash (logand offset 1) 2)
1014 (ash offset -1))))))
1016 (defstruct (ea (:constructor make-ea (size &key base index scale disp))
1018 ;; note that we can represent an EA with a QWORD size, but EMIT-EA
1019 ;; can't actually emit it on its own: caller also needs to emit REX
1021 (size nil :type (member :byte :word :dword :qword))
1022 (base nil :type (or tn null))
1023 (index nil :type (or tn null))
1024 (scale 1 :type (member 1 2 4 8))
1025 (disp 0 :type (or (unsigned-byte 32) (signed-byte 32) fixup)))
1026 (def!method print-object ((ea ea) stream)
1027 (cond ((or *print-escape* *print-readably*)
1028 (print-unreadable-object (ea stream :type t)
1030 "~S~@[ base=~S~]~@[ index=~S~]~@[ scale=~S~]~@[ disp=~S~]"
1034 (let ((scale (ea-scale ea)))
1035 (if (= scale 1) nil scale))
1038 (format stream "~A PTR [" (symbol-name (ea-size ea)))
1040 (write-string (sb!c::location-print-name (ea-base ea)) stream)
1042 (write-string "+" stream)))
1044 (write-string (sb!c::location-print-name (ea-index ea)) stream))
1045 (unless (= (ea-scale ea) 1)
1046 (format stream "*~A" (ea-scale ea)))
1047 (typecase (ea-disp ea)
1050 (format stream "~@D" (ea-disp ea)))
1052 (format stream "+~A" (ea-disp ea))))
1053 (write-char #\] stream))))
1055 (defun emit-constant-tn-rip (segment constant-tn reg)
1056 ;; AMD64 doesn't currently have a code object register to use as a
1057 ;; base register for constant access. Instead we use RIP-relative
1058 ;; addressing. The offset from the SIMPLE-FUN-HEADER to the instruction
1059 ;; is passed to the backpatch callback. In addition we need the offset
1060 ;; from the start of the function header to the slot in the CODE-HEADER
1061 ;; that stores the constant. Since we don't know where the code header
1062 ;; starts, instead count backwards from the function header.
1063 (let* ((2comp (component-info *component-being-compiled*))
1064 (constants (ir2-component-constants 2comp))
1065 (len (length constants))
1066 ;; Both CODE-HEADER and SIMPLE-FUN-HEADER are 16-byte aligned.
1067 ;; If there are an even amount of constants, there will be
1068 ;; an extra qword of padding before the function header, which
1069 ;; needs to be adjusted for. XXX: This will break if new slots
1070 ;; are added to the code header.
1071 (offset (* (- (+ len (if (evenp len)
1074 (tn-offset constant-tn))
1076 ;; RIP-relative addressing
1077 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1078 (emit-back-patch segment
1080 (lambda (segment posn)
1081 ;; The addressing is relative to end of instruction,
1082 ;; i.e. the end of this dword. Hence the + 4.
1083 (emit-dword segment (+ 4 (- (+ offset posn)))))))
1086 (defun emit-label-rip (segment fixup reg)
1087 (let ((label (fixup-offset fixup)))
1088 ;; RIP-relative addressing
1089 (emit-mod-reg-r/m-byte segment #b00 reg #b101)
1090 (emit-back-patch segment
1092 (lambda (segment posn)
1093 (emit-dword segment (- (label-position label)
1097 (defun emit-ea (segment thing reg &optional allow-constants)
1100 ;; this would be eleganter if we had a function that would create
1102 (ecase (sb-name (sc-sb (tn-sc thing)))
1103 ((registers float-registers)
1104 (emit-mod-reg-r/m-byte segment #b11 reg (reg-tn-encoding thing)))
1106 ;; Convert stack tns into an index off RBP.
1107 (let ((disp (- (* (1+ (tn-offset thing)) n-word-bytes))))
1108 (cond ((< -128 disp 127)
1109 (emit-mod-reg-r/m-byte segment #b01 reg #b101)
1110 (emit-byte segment disp))
1112 (emit-mod-reg-r/m-byte segment #b10 reg #b101)
1113 (emit-dword segment disp)))))
1115 (unless allow-constants
1118 "Constant TNs can only be directly used in MOV, PUSH, and CMP."))
1119 (emit-constant-tn-rip segment thing reg))))
1121 (let* ((base (ea-base thing))
1122 (index (ea-index thing))
1123 (scale (ea-scale thing))
1124 (disp (ea-disp thing))
1125 (mod (cond ((or (null base)
1127 (not (= (reg-tn-encoding base) #b101))))
1129 ((and (fixnump disp) (<= -128 disp 127))
1133 (r/m (cond (index #b100)
1135 (t (reg-tn-encoding base)))))
1136 (when (and (= mod 0) (= r/m #b101))
1137 ;; this is rip-relative in amd64, so we'll use a sib instead
1138 (setf r/m #b100 scale 1))
1139 (emit-mod-reg-r/m-byte segment mod reg r/m)
1141 (let ((ss (1- (integer-length scale)))
1142 (index (if (null index)
1144 (let ((index (reg-tn-encoding index)))
1146 (error "can't index off of ESP")
1148 (base (if (null base)
1150 (reg-tn-encoding base))))
1151 (emit-sib-byte segment ss index base)))
1153 (emit-byte segment disp))
1154 ((or (= mod #b10) (null base))
1156 (emit-absolute-fixup segment disp)
1157 (emit-dword segment disp))))))
1159 (typecase (fixup-offset thing)
1161 (emit-label-rip segment thing reg))
1163 (emit-mod-reg-r/m-byte segment #b00 reg #b100)
1164 (emit-sib-byte segment 0 #b100 #b101)
1165 (emit-absolute-fixup segment thing))))))
1167 (defun fp-reg-tn-p (thing)
1169 (eq (sb-name (sc-sb (tn-sc thing))) 'float-registers)))
1171 ;;; like the above, but for fp-instructions--jrd
1172 (defun emit-fp-op (segment thing op)
1173 (if (fp-reg-tn-p thing)
1174 (emit-byte segment (dpb op (byte 3 3) (dpb (tn-offset thing)
1177 (emit-ea segment thing op)))
1179 (defun byte-reg-p (thing)
1181 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1182 (member (sc-name (tn-sc thing)) *byte-sc-names*)
1185 (defun byte-ea-p (thing)
1187 (ea (eq (ea-size thing) :byte))
1189 (and (member (sc-name (tn-sc thing)) *byte-sc-names*) t))
1192 (defun word-reg-p (thing)
1194 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1195 (member (sc-name (tn-sc thing)) *word-sc-names*)
1198 (defun word-ea-p (thing)
1200 (ea (eq (ea-size thing) :word))
1201 (tn (and (member (sc-name (tn-sc thing)) *word-sc-names*) t))
1204 (defun dword-reg-p (thing)
1206 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1207 (member (sc-name (tn-sc thing)) *dword-sc-names*)
1210 (defun dword-ea-p (thing)
1212 (ea (eq (ea-size thing) :dword))
1214 (and (member (sc-name (tn-sc thing)) *dword-sc-names*) t))
1217 (defun qword-reg-p (thing)
1219 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)
1220 (member (sc-name (tn-sc thing)) *qword-sc-names*)
1223 (defun qword-ea-p (thing)
1225 (ea (eq (ea-size thing) :qword))
1227 (and (member (sc-name (tn-sc thing)) *qword-sc-names*) t))
1230 (defun register-p (thing)
1232 (eq (sb-name (sc-sb (tn-sc thing))) 'registers)))
1234 (defun accumulator-p (thing)
1235 (and (register-p thing)
1236 (= (tn-offset thing) 0)))
1241 (def!constant +operand-size-prefix-byte+ #b01100110)
1243 (defun maybe-emit-operand-size-prefix (segment size)
1244 (unless (or (eq size :byte)
1245 (eq size :qword) ; REX prefix handles this
1246 (eq size +default-operand-size+))
1247 (emit-byte segment +operand-size-prefix-byte+)))
1249 ;;; A REX prefix must be emitted if at least one of the following
1250 ;;; conditions is true:
1251 ;; 1. The operand size is :QWORD and the default operand size of the
1252 ;; instruction is not :QWORD.
1253 ;;; 2. The instruction references an extended register.
1254 ;;; 3. The instruction references one of the byte registers SIL, DIL,
1257 ;;; Emit a REX prefix if necessary. OPERAND-SIZE is used to determine
1258 ;;; whether to set REX.W. Callers pass it explicitly as :DO-NOT-SET if
1259 ;;; this should not happen, for example because the instruction's
1260 ;;; default operand size is qword. R, X and B are NIL or TNs specifying
1261 ;;; registers the encodings of which are extended with the REX.R, REX.X
1262 ;;; and REX.B bit, respectively. To determine whether one of the byte
1263 ;;; registers is used that can only be accessed using a REX prefix, we
1264 ;;; need only to test R and B, because X is only used for the index
1265 ;;; register of an effective address and therefore never byte-sized.
1266 ;;; For R we can avoid to calculate the size of the TN because it is
1267 ;;; always OPERAND-SIZE. The size of B must be calculated here because
1268 ;;; B can be address-sized (if it is the base register of an effective
1269 ;;; address), of OPERAND-SIZE (if the instruction operates on two
1270 ;;; registers) or of some different size (in the instructions that
1271 ;;; combine arguments of different sizes: MOVZX, MOVSX, MOVSXD).
1272 ;;; We don't distinguish between general purpose and floating point
1273 ;;; registers for this cause because only general purpose registers can
1274 ;;; be byte-sized at all.
1275 (defun maybe-emit-rex-prefix (segment operand-size r x b)
1276 (declare (type (member nil :byte :word :dword :qword :float :double
1279 (type (or null tn) r x b))
1281 (if (and r (> (tn-offset r)
1282 ;; offset of r8 is 16, offset of xmm8 is 8
1289 ;; Assuming R is a TN describing a general purpose
1290 ;; register, return true if it references register
1292 (<= 8 (tn-offset r) 15)))
1293 (let ((rex-w (if (eq operand-size :qword) 1 0))
1297 (when (or (not (zerop (logior rex-w rex-r rex-x rex-b)))
1299 (eq operand-size :byte)
1302 (eq (operand-size b) :byte)
1304 (emit-rex-byte segment #b0100 rex-w rex-r rex-x rex-b)))))
1306 ;;; Emit a REX prefix if necessary. The operand size is determined from
1307 ;;; THING or can be overwritten by OPERAND-SIZE. This and REG are always
1308 ;;; passed to MAYBE-EMIT-REX-PREFIX. Additionally, if THING is an EA we
1309 ;;; pass its index and base registers, if it is a register TN, we pass
1311 ;;; In contrast to EMIT-EA above, neither stack TNs nor fixups need to
1312 ;;; be treated specially here: If THING is a stack TN, neither it nor
1313 ;;; any of its components are passed to MAYBE-EMIT-REX-PREFIX which
1314 ;;; works correctly because stack references always use RBP as the base
1315 ;;; register and never use an index register so no extended registers
1316 ;;; need to be accessed. Fixups are assembled using an addressing mode
1317 ;;; of displacement-only or RIP-plus-displacement (see EMIT-EA), so may
1318 ;;; not reference an extended register. The displacement-only addressing
1319 ;;; mode requires that REX.X is 0, which is ensured here.
1320 (defun maybe-emit-rex-for-ea (segment thing reg &key operand-size)
1321 (declare (type (or ea tn fixup) thing)
1322 (type (or null tn) reg)
1323 (type (member nil :byte :word :dword :qword :float :double
1326 (let ((ea-p (ea-p thing)))
1327 (maybe-emit-rex-prefix segment
1328 (or operand-size (operand-size thing))
1330 (and ea-p (ea-index thing))
1331 (cond (ea-p (ea-base thing))
1333 (member (sb-name (sc-sb (tn-sc thing)))
1334 '(float-registers registers)))
1338 (defun operand-size (thing)
1341 ;; FIXME: might as well be COND instead of having to use #. readmacro
1342 ;; to hack up the code
1343 (case (sc-name (tn-sc thing))
1352 ;; added by jrd: float-registers is a separate size (?)
1355 (#.*double-sc-names*
1358 (error "can't tell the size of ~S ~S" thing (sc-name (tn-sc thing))))))
1362 ;; GNA. Guess who spelt "flavor" correctly first time round?
1363 ;; There's a strong argument in my mind to change all uses of
1364 ;; "flavor" to "kind": and similarly with some misguided uses of
1365 ;; "type" here and there. -- CSR, 2005-01-06.
1366 (case (fixup-flavor thing)
1367 ((:foreign-dataref) :qword)))
1371 (defun matching-operand-size (dst src)
1372 (let ((dst-size (operand-size dst))
1373 (src-size (operand-size src)))
1376 (if (eq dst-size src-size)
1378 (error "size mismatch: ~S is a ~S and ~S is a ~S."
1379 dst dst-size src src-size))
1383 (error "can't tell the size of either ~S or ~S" dst src)))))
1385 (defun emit-sized-immediate (segment size value &optional quad-p)
1388 (emit-byte segment value))
1390 (emit-word segment value))
1392 ;; except in a very few cases (MOV instructions A1,A3,B8) we expect
1393 ;; dword data bytes even when 64 bit work is being done. So, mostly
1394 ;; we treat quad constants as dwords.
1395 (if (and quad-p (eq size :qword))
1396 (emit-qword segment value)
1397 (emit-dword segment value)))))
1399 ;;;; general data transfer
1401 (define-instruction mov (segment dst src)
1402 ;; immediate to register
1403 (:printer reg ((op #b1011) (imm nil :type 'signed-imm-data))
1404 '(:name :tab reg ", " imm))
1405 (:printer rex-reg ((op #b1011) (imm nil :type 'signed-imm-data-upto-qword))
1406 '(:name :tab reg ", " imm))
1407 ;; absolute mem to/from accumulator
1408 (:printer simple-dir ((op #b101000) (imm nil :type 'imm-addr))
1409 `(:name :tab ,(swap-if 'dir 'accum ", " '("[" imm "]"))))
1410 ;; register to/from register/memory
1411 (:printer reg-reg/mem-dir ((op #b100010)))
1412 (:printer rex-reg-reg/mem-dir ((op #b100010)))
1413 ;; immediate to register/memory
1414 (:printer reg/mem-imm ((op '(#b1100011 #b000))))
1415 (:printer rex-reg/mem-imm ((op '(#b1100011 #b000))))
1418 (let ((size (matching-operand-size dst src)))
1419 (maybe-emit-operand-size-prefix segment size)
1420 (cond ((register-p dst)
1421 (cond ((integerp src)
1422 (maybe-emit-rex-prefix segment size nil nil dst)
1423 (cond ((and (eq size :qword)
1424 (typep src '(signed-byte 31)))
1425 ;; When loading small immediates to a qword register
1426 ;; using B8 wastes 3 bytes compared to C7.
1427 (emit-byte segment #b11000111)
1428 (emit-mod-reg-r/m-byte segment #b11
1430 (reg-tn-encoding dst))
1431 (emit-sized-immediate segment :dword src nil))
1433 (emit-byte-with-reg segment
1437 (reg-tn-encoding dst))
1438 (emit-sized-immediate segment size src
1439 (eq size :qword)))))
1441 (maybe-emit-rex-for-ea segment src dst)
1446 (emit-ea segment src (reg-tn-encoding dst) t))))
1448 ;; C7 only deals with 32 bit immediates even if register is
1449 ;; 64 bit: only b8-bf use 64 bit immediates
1450 (maybe-emit-rex-for-ea segment dst nil)
1451 (cond ((typep src '(or (signed-byte 32) (unsigned-byte 32)))
1453 (if (eq size :byte) #b11000110 #b11000111))
1454 (emit-ea segment dst #b000)
1455 (emit-sized-immediate segment
1456 (case size (:qword :dword) (t size))
1461 (maybe-emit-rex-for-ea segment dst src)
1462 (emit-byte segment (if (eq size :byte) #b10001000 #b10001001))
1463 (emit-ea segment dst (reg-tn-encoding src)))
1465 ;; Generally we can't MOV a fixupped value into an EA, since
1466 ;; MOV on non-registers can only take a 32-bit immediate arg.
1467 ;; Make an exception for :FOREIGN fixups (pretty much just
1468 ;; the runtime asm, since other foreign calls go through the
1469 ;; the linkage table) and for linkage table references, since
1470 ;; these should always end up in low memory.
1471 (aver (or (eq (fixup-flavor src) :foreign)
1472 (eq (fixup-flavor src) :foreign-dataref)
1473 (eq (ea-size dst) :dword)))
1474 (maybe-emit-rex-for-ea segment dst nil)
1475 (emit-byte segment #b11000111)
1476 (emit-ea segment dst #b000)
1477 (emit-absolute-fixup segment src))
1479 (error "bogus arguments to MOV: ~S ~S" dst src))))))
1481 (defun emit-move-with-extension (segment dst src signed-p)
1482 (aver (register-p dst))
1483 (let ((dst-size (operand-size dst))
1484 (src-size (operand-size src))
1485 (opcode (if signed-p #b10111110 #b10110110)))
1488 (aver (eq src-size :byte))
1489 (maybe-emit-operand-size-prefix segment :word)
1490 ;; REX prefix is needed if SRC is SIL, DIL, SPL or BPL.
1491 (maybe-emit-rex-for-ea segment src dst :operand-size :word)
1492 (emit-byte segment #b00001111)
1493 (emit-byte segment opcode)
1494 (emit-ea segment src (reg-tn-encoding dst)))
1498 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1499 (emit-byte segment #b00001111)
1500 (emit-byte segment opcode)
1501 (emit-ea segment src (reg-tn-encoding dst)))
1503 (maybe-emit-rex-for-ea segment src dst :operand-size dst-size)
1504 (emit-byte segment #b00001111)
1505 (emit-byte segment (logior opcode 1))
1506 (emit-ea segment src (reg-tn-encoding dst)))
1508 (aver (eq dst-size :qword))
1509 ;; dst is in reg, src is in modrm
1510 (let ((ea-p (ea-p src)))
1511 (maybe-emit-rex-prefix segment (if signed-p :qword :dword) dst
1512 (and ea-p (ea-index src))
1513 (cond (ea-p (ea-base src))
1516 (emit-byte segment #x63) ;movsxd
1517 ;;(emit-byte segment opcode)
1518 (emit-ea segment src (reg-tn-encoding dst)))))))))
1520 (define-instruction movsx (segment dst src)
1521 (:printer ext-reg-reg/mem-no-width
1522 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1523 (:printer rex-ext-reg-reg/mem-no-width
1524 ((op #b10111110) (reg/mem nil :type 'sized-byte-reg/mem)))
1525 (:printer ext-reg-reg/mem-no-width
1526 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1527 (:printer rex-ext-reg-reg/mem-no-width
1528 ((op #b10111111) (reg/mem nil :type 'sized-word-reg/mem)))
1529 (:emitter (emit-move-with-extension segment dst src :signed)))
1531 (define-instruction movzx (segment dst src)
1532 (:printer ext-reg-reg/mem-no-width
1533 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1534 (:printer rex-ext-reg-reg/mem-no-width
1535 ((op #b10110110) (reg/mem nil :type 'sized-byte-reg/mem)))
1536 (:printer ext-reg-reg/mem-no-width
1537 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1538 (:printer rex-ext-reg-reg/mem-no-width
1539 ((op #b10110111) (reg/mem nil :type 'sized-word-reg/mem)))
1540 (:emitter (emit-move-with-extension segment dst src nil)))
1542 ;;; The regular use of MOVSXD is with an operand size of :qword. This
1543 ;;; sign-extends the dword source into the qword destination register.
1544 ;;; If the operand size is :dword the instruction zero-extends the dword
1545 ;;; source into the qword destination register, i.e. it does the same as
1546 ;;; a dword MOV into a register.
1547 (define-instruction movsxd (segment dst src)
1548 (:printer reg-reg/mem ((op #b0110001) (width 1)
1549 (reg/mem nil :type 'sized-dword-reg/mem)))
1550 (:printer rex-reg-reg/mem ((op #b0110001) (width 1)
1551 (reg/mem nil :type 'sized-dword-reg/mem)))
1552 (:emitter (emit-move-with-extension segment dst src :signed)))
1554 ;;; this is not a real amd64 instruction, of course
1555 (define-instruction movzxd (segment dst src)
1556 ; (:printer reg-reg/mem ((op #x63) (reg nil :type 'reg)))
1557 (:emitter (emit-move-with-extension segment dst src nil)))
1559 (define-instruction push (segment src)
1561 (:printer reg-no-width-default-qword ((op #b01010)))
1562 (:printer rex-reg-no-width-default-qword ((op #b01010)))
1564 (:printer reg/mem-default-qword ((op '(#b11111111 #b110))))
1565 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b110))))
1567 (:printer byte ((op #b01101010) (imm nil :type 'signed-imm-byte))
1569 (:printer byte ((op #b01101000)
1570 (imm nil :type 'signed-imm-data-default-qword))
1572 ;; ### segment registers?
1575 (cond ((integerp src)
1576 (cond ((<= -128 src 127)
1577 (emit-byte segment #b01101010)
1578 (emit-byte segment src))
1580 ;; A REX-prefix is not needed because the operand size
1581 ;; defaults to 64 bits. The size of the immediate is 32
1582 ;; bits and it is sign-extended.
1583 (emit-byte segment #b01101000)
1584 (emit-dword segment src))))
1586 (let ((size (operand-size src)))
1587 (aver (not (eq size :byte)))
1588 (maybe-emit-operand-size-prefix segment size)
1589 (maybe-emit-rex-for-ea segment src nil :operand-size :do-not-set)
1590 (cond ((register-p src)
1591 (emit-byte-with-reg segment #b01010 (reg-tn-encoding src)))
1593 (emit-byte segment #b11111111)
1594 (emit-ea segment src #b110 t))))))))
1596 (define-instruction pop (segment dst)
1597 (:printer reg-no-width-default-qword ((op #b01011)))
1598 (:printer rex-reg-no-width-default-qword ((op #b01011)))
1599 (:printer reg/mem-default-qword ((op '(#b10001111 #b000))))
1600 (:printer rex-reg/mem-default-qword ((op '(#b10001111 #b000))))
1602 (let ((size (operand-size dst)))
1603 (aver (not (eq size :byte)))
1604 (maybe-emit-operand-size-prefix segment size)
1605 (maybe-emit-rex-for-ea segment dst nil :operand-size :do-not-set)
1606 (cond ((register-p dst)
1607 (emit-byte-with-reg segment #b01011 (reg-tn-encoding dst)))
1609 (emit-byte segment #b10001111)
1610 (emit-ea segment dst #b000))))))
1612 (define-instruction xchg (segment operand1 operand2)
1613 ;; Register with accumulator.
1614 (:printer reg-no-width ((op #b10010)) '(:name :tab accum ", " reg))
1615 ;; Register/Memory with Register.
1616 (:printer reg-reg/mem ((op #b1000011)))
1617 (:printer rex-reg-reg/mem ((op #b1000011)))
1619 (let ((size (matching-operand-size operand1 operand2)))
1620 (maybe-emit-operand-size-prefix segment size)
1621 (labels ((xchg-acc-with-something (acc something)
1622 (if (and (not (eq size :byte)) (register-p something))
1624 (maybe-emit-rex-for-ea segment acc something)
1625 (emit-byte-with-reg segment
1627 (reg-tn-encoding something)))
1628 (xchg-reg-with-something acc something)))
1629 (xchg-reg-with-something (reg something)
1630 (maybe-emit-rex-for-ea segment something reg)
1631 (emit-byte segment (if (eq size :byte) #b10000110 #b10000111))
1632 (emit-ea segment something (reg-tn-encoding reg))))
1633 (cond ((accumulator-p operand1)
1634 (xchg-acc-with-something operand1 operand2))
1635 ((accumulator-p operand2)
1636 (xchg-acc-with-something operand2 operand1))
1637 ((register-p operand1)
1638 (xchg-reg-with-something operand1 operand2))
1639 ((register-p operand2)
1640 (xchg-reg-with-something operand2 operand1))
1642 (error "bogus args to XCHG: ~S ~S" operand1 operand2)))))))
1644 (define-instruction lea (segment dst src)
1645 (:printer rex-reg-reg/mem ((op #b1000110)))
1646 (:printer reg-reg/mem ((op #b1000110) (width 1)))
1648 (aver (or (dword-reg-p dst) (qword-reg-p dst)))
1649 (maybe-emit-rex-for-ea segment src dst
1650 :operand-size :qword)
1651 (emit-byte segment #b10001101)
1652 (emit-ea segment src (reg-tn-encoding dst))))
1654 (define-instruction cmpxchg (segment dst src)
1655 ;; Register/Memory with Register.
1656 (:printer ext-reg-reg/mem ((op #b1011000)) '(:name :tab reg/mem ", " reg))
1658 (aver (register-p src))
1659 (let ((size (matching-operand-size src dst)))
1660 (maybe-emit-operand-size-prefix segment size)
1661 (maybe-emit-rex-for-ea segment dst src)
1662 (emit-byte segment #b00001111)
1663 (emit-byte segment (if (eq size :byte) #b10110000 #b10110001))
1664 (emit-ea segment dst (reg-tn-encoding src)))))
1668 (define-instruction fs-segment-prefix (segment)
1670 (emit-byte segment #x64)))
1672 ;;;; flag control instructions
1674 ;;; CLC -- Clear Carry Flag.
1675 (define-instruction clc (segment)
1676 (:printer byte ((op #b11111000)))
1678 (emit-byte segment #b11111000)))
1680 ;;; CLD -- Clear Direction Flag.
1681 (define-instruction cld (segment)
1682 (:printer byte ((op #b11111100)))
1684 (emit-byte segment #b11111100)))
1686 ;;; CLI -- Clear Iterrupt Enable Flag.
1687 (define-instruction cli (segment)
1688 (:printer byte ((op #b11111010)))
1690 (emit-byte segment #b11111010)))
1692 ;;; CMC -- Complement Carry Flag.
1693 (define-instruction cmc (segment)
1694 (:printer byte ((op #b11110101)))
1696 (emit-byte segment #b11110101)))
1698 ;;; LAHF -- Load AH into flags.
1699 (define-instruction lahf (segment)
1700 (:printer byte ((op #b10011111)))
1702 (emit-byte segment #b10011111)))
1704 ;;; POPF -- Pop flags.
1705 (define-instruction popf (segment)
1706 (:printer byte ((op #b10011101)))
1708 (emit-byte segment #b10011101)))
1710 ;;; PUSHF -- push flags.
1711 (define-instruction pushf (segment)
1712 (:printer byte ((op #b10011100)))
1714 (emit-byte segment #b10011100)))
1716 ;;; SAHF -- Store AH into flags.
1717 (define-instruction sahf (segment)
1718 (:printer byte ((op #b10011110)))
1720 (emit-byte segment #b10011110)))
1722 ;;; STC -- Set Carry Flag.
1723 (define-instruction stc (segment)
1724 (:printer byte ((op #b11111001)))
1726 (emit-byte segment #b11111001)))
1728 ;;; STD -- Set Direction Flag.
1729 (define-instruction std (segment)
1730 (:printer byte ((op #b11111101)))
1732 (emit-byte segment #b11111101)))
1734 ;;; STI -- Set Interrupt Enable Flag.
1735 (define-instruction sti (segment)
1736 (:printer byte ((op #b11111011)))
1738 (emit-byte segment #b11111011)))
1742 (defun emit-random-arith-inst (name segment dst src opcode
1743 &optional allow-constants)
1744 (let ((size (matching-operand-size dst src)))
1745 (maybe-emit-operand-size-prefix segment size)
1748 (cond ((and (not (eq size :byte)) (<= -128 src 127))
1749 (maybe-emit-rex-for-ea segment dst nil)
1750 (emit-byte segment #b10000011)
1751 (emit-ea segment dst opcode allow-constants)
1752 (emit-byte segment src))
1753 ((accumulator-p dst)
1754 (maybe-emit-rex-for-ea segment dst nil)
1761 (emit-sized-immediate segment size src))
1763 (maybe-emit-rex-for-ea segment dst nil)
1764 (emit-byte segment (if (eq size :byte) #b10000000 #b10000001))
1765 (emit-ea segment dst opcode allow-constants)
1766 (emit-sized-immediate segment size src))))
1768 (maybe-emit-rex-for-ea segment dst src)
1772 (if (eq size :byte) #b00000000 #b00000001)))
1773 (emit-ea segment dst (reg-tn-encoding src) allow-constants))
1775 (maybe-emit-rex-for-ea segment src dst)
1779 (if (eq size :byte) #b00000010 #b00000011)))
1780 (emit-ea segment src (reg-tn-encoding dst) allow-constants))
1782 (error "bogus operands to ~A" name)))))
1784 (eval-when (:compile-toplevel :execute)
1785 (defun arith-inst-printer-list (subop)
1786 `((accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1787 (rex-accum-imm ((op ,(dpb subop (byte 3 2) #b0000010))))
1788 (reg/mem-imm ((op (#b1000000 ,subop))))
1789 (rex-reg/mem-imm ((op (#b1000000 ,subop))))
1790 ;; The redundant encoding #x82 is invalid in 64-bit mode,
1791 ;; therefore we force WIDTH to 1.
1792 (reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1793 (imm nil :type signed-imm-byte)))
1794 (rex-reg/mem-imm ((op (#b1000001 ,subop)) (width 1)
1795 (imm nil :type signed-imm-byte)))
1796 (reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))
1797 (rex-reg-reg/mem-dir ((op ,(dpb subop (byte 3 1) #b000000))))))
1800 (define-instruction add (segment dst src)
1801 (:printer-list (arith-inst-printer-list #b000))
1802 (:emitter (emit-random-arith-inst "ADD" segment dst src #b000)))
1804 (define-instruction adc (segment dst src)
1805 (:printer-list (arith-inst-printer-list #b010))
1806 (:emitter (emit-random-arith-inst "ADC" segment dst src #b010)))
1808 (define-instruction sub (segment dst src)
1809 (:printer-list (arith-inst-printer-list #b101))
1810 (:emitter (emit-random-arith-inst "SUB" segment dst src #b101)))
1812 (define-instruction sbb (segment dst src)
1813 (:printer-list (arith-inst-printer-list #b011))
1814 (:emitter (emit-random-arith-inst "SBB" segment dst src #b011)))
1816 (define-instruction cmp (segment dst src)
1817 (:printer-list (arith-inst-printer-list #b111))
1818 (:emitter (emit-random-arith-inst "CMP" segment dst src #b111 t)))
1820 (define-instruction inc (segment dst)
1822 (:printer modrm-reg-no-width ((modrm-reg #b000)))
1824 ;; (:printer rex-reg/mem ((op '(#b11111111 #b001))))
1825 (:printer reg/mem ((op '(#b1111111 #b000))))
1827 (let ((size (operand-size dst)))
1828 (maybe-emit-operand-size-prefix segment size)
1829 (cond #+nil ; these opcodes become REX prefixes in x86-64
1830 ((and (not (eq size :byte)) (register-p dst))
1831 (emit-byte-with-reg segment #b01000 (reg-tn-encoding dst)))
1833 (maybe-emit-rex-for-ea segment dst nil)
1834 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1835 (emit-ea segment dst #b000))))))
1837 (define-instruction dec (segment dst)
1839 (:printer modrm-reg-no-width ((modrm-reg #b001)))
1841 (:printer reg/mem ((op '(#b1111111 #b001))))
1843 (let ((size (operand-size dst)))
1844 (maybe-emit-operand-size-prefix segment size)
1846 ((and (not (eq size :byte)) (register-p dst))
1847 (emit-byte-with-reg segment #b01001 (reg-tn-encoding dst)))
1849 (maybe-emit-rex-for-ea segment dst nil)
1850 (emit-byte segment (if (eq size :byte) #b11111110 #b11111111))
1851 (emit-ea segment dst #b001))))))
1853 (define-instruction neg (segment dst)
1854 (:printer reg/mem ((op '(#b1111011 #b011))))
1855 (:printer rex-reg/mem ((op '(#b1111011 #b011))))
1857 (let ((size (operand-size dst)))
1858 (maybe-emit-operand-size-prefix segment size)
1859 (maybe-emit-rex-for-ea segment dst nil)
1860 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1861 (emit-ea segment dst #b011))))
1863 (define-instruction mul (segment dst src)
1864 (:printer accum-reg/mem ((op '(#b1111011 #b100))))
1865 (:printer rex-accum-reg/mem ((op '(#b1111011 #b100))))
1867 (let ((size (matching-operand-size dst src)))
1868 (aver (accumulator-p dst))
1869 (maybe-emit-operand-size-prefix segment size)
1870 (maybe-emit-rex-for-ea segment src nil)
1871 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1872 (emit-ea segment src #b100))))
1874 (define-instruction imul (segment dst &optional src1 src2)
1875 (:printer accum-reg/mem ((op '(#b1111011 #b101))))
1876 (:printer rex-accum-reg/mem ((op '(#b1111011 #b101))))
1877 (:printer ext-reg-reg/mem-no-width ((op #b10101111)))
1878 (:printer rex-ext-reg-reg/mem-no-width ((op #b10101111)))
1879 (:printer reg-reg/mem ((op #b0110100) (width 1)
1880 (imm nil :type 'signed-imm-data))
1881 '(:name :tab reg ", " reg/mem ", " imm))
1882 (:printer rex-reg-reg/mem ((op #b0110100) (width 1)
1883 (imm nil :type 'signed-imm-data))
1884 '(:name :tab reg ", " reg/mem ", " imm))
1885 (:printer reg-reg/mem ((op #b0110101) (width 1)
1886 (imm nil :type 'signed-imm-byte))
1887 '(:name :tab reg ", " reg/mem ", " imm))
1888 (:printer rex-reg-reg/mem ((op #b0110101) (width 1)
1889 (imm nil :type 'signed-imm-byte))
1890 '(:name :tab reg ", " reg/mem ", " imm))
1892 (flet ((r/m-with-immed-to-reg (reg r/m immed)
1893 (let* ((size (matching-operand-size reg r/m))
1894 (sx (and (not (eq size :byte)) (<= -128 immed 127))))
1895 (maybe-emit-operand-size-prefix segment size)
1896 (maybe-emit-rex-for-ea segment r/m reg)
1897 (emit-byte segment (if sx #b01101011 #b01101001))
1898 (emit-ea segment r/m (reg-tn-encoding reg))
1900 (emit-byte segment immed)
1901 (emit-sized-immediate segment size immed)))))
1903 (r/m-with-immed-to-reg dst src1 src2))
1906 (r/m-with-immed-to-reg dst dst src1)
1907 (let ((size (matching-operand-size dst src1)))
1908 (maybe-emit-operand-size-prefix segment size)
1909 (maybe-emit-rex-for-ea segment src1 dst)
1910 (emit-byte segment #b00001111)
1911 (emit-byte segment #b10101111)
1912 (emit-ea segment src1 (reg-tn-encoding dst)))))
1914 (let ((size (operand-size dst)))
1915 (maybe-emit-operand-size-prefix segment size)
1916 (maybe-emit-rex-for-ea segment dst nil)
1917 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1918 (emit-ea segment dst #b101)))))))
1920 (define-instruction div (segment dst src)
1921 (:printer accum-reg/mem ((op '(#b1111011 #b110))))
1922 (:printer rex-accum-reg/mem ((op '(#b1111011 #b110))))
1924 (let ((size (matching-operand-size dst src)))
1925 (aver (accumulator-p dst))
1926 (maybe-emit-operand-size-prefix segment size)
1927 (maybe-emit-rex-for-ea segment src nil)
1928 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1929 (emit-ea segment src #b110))))
1931 (define-instruction idiv (segment dst src)
1932 (:printer accum-reg/mem ((op '(#b1111011 #b111))))
1933 (:printer rex-accum-reg/mem ((op '(#b1111011 #b111))))
1935 (let ((size (matching-operand-size dst src)))
1936 (aver (accumulator-p dst))
1937 (maybe-emit-operand-size-prefix segment size)
1938 (maybe-emit-rex-for-ea segment src nil)
1939 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
1940 (emit-ea segment src #b111))))
1942 (define-instruction bswap (segment dst)
1943 (:printer ext-reg-no-width ((op #b11001)))
1945 (let ((size (operand-size dst)))
1946 (maybe-emit-rex-prefix segment size nil nil dst)
1947 (emit-byte segment #x0f)
1948 (emit-byte-with-reg segment #b11001 (reg-tn-encoding dst)))))
1950 ;;; CBW -- Convert Byte to Word. AX <- sign_xtnd(AL)
1951 (define-instruction cbw (segment)
1952 (:printer x66-byte ((op #b10011000)))
1954 (maybe-emit-operand-size-prefix segment :word)
1955 (emit-byte segment #b10011000)))
1957 ;;; CWDE -- Convert Word To Double Word Extended. EAX <- sign_xtnd(AX)
1958 (define-instruction cwde (segment)
1959 (:printer byte ((op #b10011000)))
1961 (maybe-emit-operand-size-prefix segment :dword)
1962 (emit-byte segment #b10011000)))
1964 ;;; CDQE -- Convert Word To Double Word Extended. RAX <- sign_xtnd(EAX)
1965 (define-instruction cdqe (segment)
1966 (:printer rex-byte ((op #b10011000)))
1968 (maybe-emit-rex-prefix segment :qword nil nil nil)
1969 (emit-byte segment #b10011000)))
1971 ;;; CWD -- Convert Word to Double Word. DX:AX <- sign_xtnd(AX)
1972 (define-instruction cwd (segment)
1973 (:printer x66-byte ((op #b10011001)))
1975 (maybe-emit-operand-size-prefix segment :word)
1976 (emit-byte segment #b10011001)))
1978 ;;; CDQ -- Convert Double Word to Quad Word. EDX:EAX <- sign_xtnd(EAX)
1979 (define-instruction cdq (segment)
1980 (:printer byte ((op #b10011001)))
1982 (maybe-emit-operand-size-prefix segment :dword)
1983 (emit-byte segment #b10011001)))
1985 ;;; CQO -- Convert Quad Word to Octaword. RDX:RAX <- sign_xtnd(RAX)
1986 (define-instruction cqo (segment)
1987 (:printer rex-byte ((op #b10011001)))
1989 (maybe-emit-rex-prefix segment :qword nil nil nil)
1990 (emit-byte segment #b10011001)))
1992 (define-instruction xadd (segment dst src)
1993 ;; Register/Memory with Register.
1994 (:printer ext-reg-reg/mem ((op #b1100000)) '(:name :tab reg/mem ", " reg))
1996 (aver (register-p src))
1997 (let ((size (matching-operand-size src dst)))
1998 (maybe-emit-operand-size-prefix segment size)
1999 (maybe-emit-rex-for-ea segment dst src)
2000 (emit-byte segment #b00001111)
2001 (emit-byte segment (if (eq size :byte) #b11000000 #b11000001))
2002 (emit-ea segment dst (reg-tn-encoding src)))))
2007 (defun emit-shift-inst (segment dst amount opcode)
2008 (let ((size (operand-size dst)))
2009 (maybe-emit-operand-size-prefix segment size)
2010 (multiple-value-bind (major-opcode immed)
2012 (:cl (values #b11010010 nil))
2013 (1 (values #b11010000 nil))
2014 (t (values #b11000000 t)))
2015 (maybe-emit-rex-for-ea segment dst nil)
2017 (if (eq size :byte) major-opcode (logior major-opcode 1)))
2018 (emit-ea segment dst opcode)
2020 (emit-byte segment amount)))))
2022 (eval-when (:compile-toplevel :execute)
2023 (defun shift-inst-printer-list (subop)
2024 `((reg/mem ((op (#b1101000 ,subop)))
2025 (:name :tab reg/mem ", 1"))
2026 (rex-reg/mem ((op (#b1101000 ,subop)))
2027 (:name :tab reg/mem ", 1"))
2028 (reg/mem ((op (#b1101001 ,subop)))
2029 (:name :tab reg/mem ", " 'cl))
2030 (rex-reg/mem ((op (#b1101001 ,subop)))
2031 (:name :tab reg/mem ", " 'cl))
2032 (reg/mem-imm ((op (#b1100000 ,subop))
2033 (imm nil :type imm-byte)))
2034 (rex-reg/mem-imm ((op (#b1100000 ,subop))
2035 (imm nil :type imm-byte))))))
2037 (define-instruction rol (segment dst amount)
2039 (shift-inst-printer-list #b000))
2041 (emit-shift-inst segment dst amount #b000)))
2043 (define-instruction ror (segment dst amount)
2045 (shift-inst-printer-list #b001))
2047 (emit-shift-inst segment dst amount #b001)))
2049 (define-instruction rcl (segment dst amount)
2051 (shift-inst-printer-list #b010))
2053 (emit-shift-inst segment dst amount #b010)))
2055 (define-instruction rcr (segment dst amount)
2057 (shift-inst-printer-list #b011))
2059 (emit-shift-inst segment dst amount #b011)))
2061 (define-instruction shl (segment dst amount)
2063 (shift-inst-printer-list #b100))
2065 (emit-shift-inst segment dst amount #b100)))
2067 (define-instruction shr (segment dst amount)
2069 (shift-inst-printer-list #b101))
2071 (emit-shift-inst segment dst amount #b101)))
2073 (define-instruction sar (segment dst amount)
2075 (shift-inst-printer-list #b111))
2077 (emit-shift-inst segment dst amount #b111)))
2079 (defun emit-double-shift (segment opcode dst src amt)
2080 (let ((size (matching-operand-size dst src)))
2081 (when (eq size :byte)
2082 (error "Double shifts can only be used with words."))
2083 (maybe-emit-operand-size-prefix segment size)
2084 (maybe-emit-rex-for-ea segment dst src)
2085 (emit-byte segment #b00001111)
2086 (emit-byte segment (dpb opcode (byte 1 3)
2087 (if (eq amt :cl) #b10100101 #b10100100)))
2088 (emit-ea segment dst (reg-tn-encoding src))
2089 (unless (eq amt :cl)
2090 (emit-byte segment amt))))
2092 (eval-when (:compile-toplevel :execute)
2093 (defun double-shift-inst-printer-list (op)
2095 (ext-reg-reg/mem-imm ((op ,(logior op #b100))
2096 (imm nil :type signed-imm-byte)))
2097 (ext-reg-reg/mem ((op ,(logior op #b101)))
2098 (:name :tab reg/mem ", " 'cl)))))
2100 (define-instruction shld (segment dst src amt)
2101 (:declare (type (or (member :cl) (mod 32)) amt))
2102 (:printer-list (double-shift-inst-printer-list #b10100000))
2104 (emit-double-shift segment #b0 dst src amt)))
2106 (define-instruction shrd (segment dst src amt)
2107 (:declare (type (or (member :cl) (mod 32)) amt))
2108 (:printer-list (double-shift-inst-printer-list #b10101000))
2110 (emit-double-shift segment #b1 dst src amt)))
2112 (define-instruction and (segment dst src)
2114 (arith-inst-printer-list #b100))
2116 (emit-random-arith-inst "AND" segment dst src #b100)))
2118 (define-instruction test (segment this that)
2119 (:printer accum-imm ((op #b1010100)))
2120 (:printer rex-accum-imm ((op #b1010100)))
2121 (:printer reg/mem-imm ((op '(#b1111011 #b000))))
2122 (:printer rex-reg/mem-imm ((op '(#b1111011 #b000))))
2123 (:printer reg-reg/mem ((op #b1000010)))
2124 (:printer rex-reg-reg/mem ((op #b1000010)))
2126 (let ((size (matching-operand-size this that)))
2127 (maybe-emit-operand-size-prefix segment size)
2128 (flet ((test-immed-and-something (immed something)
2129 (cond ((accumulator-p something)
2130 (maybe-emit-rex-for-ea segment something nil)
2132 (if (eq size :byte) #b10101000 #b10101001))
2133 (emit-sized-immediate segment size immed))
2135 (maybe-emit-rex-for-ea segment something nil)
2137 (if (eq size :byte) #b11110110 #b11110111))
2138 (emit-ea segment something #b000)
2139 (emit-sized-immediate segment size immed))))
2140 (test-reg-and-something (reg something)
2141 (maybe-emit-rex-for-ea segment something reg)
2142 (emit-byte segment (if (eq size :byte) #b10000100 #b10000101))
2143 (emit-ea segment something (reg-tn-encoding reg))))
2144 (cond ((integerp that)
2145 (test-immed-and-something that this))
2147 (test-immed-and-something this that))
2149 (test-reg-and-something this that))
2151 (test-reg-and-something that this))
2153 (error "bogus operands for TEST: ~S and ~S" this that)))))))
2155 (define-instruction or (segment dst src)
2157 (arith-inst-printer-list #b001))
2159 (emit-random-arith-inst "OR" segment dst src #b001)))
2161 (define-instruction xor (segment dst src)
2163 (arith-inst-printer-list #b110))
2165 (emit-random-arith-inst "XOR" segment dst src #b110)))
2167 (define-instruction not (segment dst)
2168 (:printer reg/mem ((op '(#b1111011 #b010))))
2169 (:printer rex-reg/mem ((op '(#b1111011 #b010))))
2171 (let ((size (operand-size dst)))
2172 (maybe-emit-operand-size-prefix segment size)
2173 (maybe-emit-rex-for-ea segment dst nil)
2174 (emit-byte segment (if (eq size :byte) #b11110110 #b11110111))
2175 (emit-ea segment dst #b010))))
2177 ;;;; string manipulation
2179 (define-instruction cmps (segment size)
2180 (:printer string-op ((op #b1010011)))
2181 (:printer rex-string-op ((op #b1010011)))
2183 (maybe-emit-operand-size-prefix segment size)
2184 (maybe-emit-rex-prefix segment size nil nil nil)
2185 (emit-byte segment (if (eq size :byte) #b10100110 #b10100111))))
2187 (define-instruction ins (segment acc)
2188 (:printer string-op ((op #b0110110)))
2189 (:printer rex-string-op ((op #b0110110)))
2191 (let ((size (operand-size acc)))
2192 (aver (accumulator-p acc))
2193 (maybe-emit-operand-size-prefix segment size)
2194 (maybe-emit-rex-prefix segment size nil nil nil)
2195 (emit-byte segment (if (eq size :byte) #b01101100 #b01101101)))))
2197 (define-instruction lods (segment acc)
2198 (:printer string-op ((op #b1010110)))
2199 (:printer rex-string-op ((op #b1010110)))
2201 (let ((size (operand-size acc)))
2202 (aver (accumulator-p acc))
2203 (maybe-emit-operand-size-prefix segment size)
2204 (maybe-emit-rex-prefix segment size nil nil nil)
2205 (emit-byte segment (if (eq size :byte) #b10101100 #b10101101)))))
2207 (define-instruction movs (segment size)
2208 (:printer string-op ((op #b1010010)))
2209 (:printer rex-string-op ((op #b1010010)))
2211 (maybe-emit-operand-size-prefix segment size)
2212 (maybe-emit-rex-prefix segment size nil nil nil)
2213 (emit-byte segment (if (eq size :byte) #b10100100 #b10100101))))
2215 (define-instruction outs (segment acc)
2216 (:printer string-op ((op #b0110111)))
2217 (:printer rex-string-op ((op #b0110111)))
2219 (let ((size (operand-size acc)))
2220 (aver (accumulator-p acc))
2221 (maybe-emit-operand-size-prefix segment size)
2222 (maybe-emit-rex-prefix segment size nil nil nil)
2223 (emit-byte segment (if (eq size :byte) #b01101110 #b01101111)))))
2225 (define-instruction scas (segment acc)
2226 (:printer string-op ((op #b1010111)))
2227 (:printer rex-string-op ((op #b1010111)))
2229 (let ((size (operand-size acc)))
2230 (aver (accumulator-p acc))
2231 (maybe-emit-operand-size-prefix segment size)
2232 (maybe-emit-rex-prefix segment size nil nil nil)
2233 (emit-byte segment (if (eq size :byte) #b10101110 #b10101111)))))
2235 (define-instruction stos (segment acc)
2236 (:printer string-op ((op #b1010101)))
2237 (:printer rex-string-op ((op #b1010101)))
2239 (let ((size (operand-size acc)))
2240 (aver (accumulator-p acc))
2241 (maybe-emit-operand-size-prefix segment size)
2242 (maybe-emit-rex-prefix segment size nil nil nil)
2243 (emit-byte segment (if (eq size :byte) #b10101010 #b10101011)))))
2245 (define-instruction xlat (segment)
2246 (:printer byte ((op #b11010111)))
2248 (emit-byte segment #b11010111)))
2250 (define-instruction rep (segment)
2252 (emit-byte segment #b11110010)))
2254 (define-instruction repe (segment)
2255 (:printer byte ((op #b11110011)))
2257 (emit-byte segment #b11110011)))
2259 (define-instruction repne (segment)
2260 (:printer byte ((op #b11110010)))
2262 (emit-byte segment #b11110010)))
2265 ;;;; bit manipulation
2267 (define-instruction bsf (segment dst src)
2268 (:printer ext-reg-reg/mem-no-width ((op #b10111100)))
2269 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111100)))
2271 (let ((size (matching-operand-size dst src)))
2272 (when (eq size :byte)
2273 (error "can't scan bytes: ~S" src))
2274 (maybe-emit-operand-size-prefix segment size)
2275 (maybe-emit-rex-for-ea segment src dst)
2276 (emit-byte segment #b00001111)
2277 (emit-byte segment #b10111100)
2278 (emit-ea segment src (reg-tn-encoding dst)))))
2280 (define-instruction bsr (segment dst src)
2281 (:printer ext-reg-reg/mem-no-width ((op #b10111101)))
2282 (:printer rex-ext-reg-reg/mem-no-width ((op #b10111101)))
2284 (let ((size (matching-operand-size dst src)))
2285 (when (eq size :byte)
2286 (error "can't scan bytes: ~S" src))
2287 (maybe-emit-operand-size-prefix segment size)
2288 (maybe-emit-rex-for-ea segment src dst)
2289 (emit-byte segment #b00001111)
2290 (emit-byte segment #b10111101)
2291 (emit-ea segment src (reg-tn-encoding dst)))))
2293 (defun emit-bit-test-and-mumble (segment src index opcode)
2294 (let ((size (operand-size src)))
2295 (when (eq size :byte)
2296 (error "can't scan bytes: ~S" src))
2297 (maybe-emit-operand-size-prefix segment size)
2298 (cond ((integerp index)
2299 (maybe-emit-rex-for-ea segment src nil)
2300 (emit-byte segment #b00001111)
2301 (emit-byte segment #b10111010)
2302 (emit-ea segment src opcode)
2303 (emit-byte segment index))
2305 (maybe-emit-rex-for-ea segment src index)
2306 (emit-byte segment #b00001111)
2307 (emit-byte segment (dpb opcode (byte 3 3) #b10000011))
2308 (emit-ea segment src (reg-tn-encoding index))))))
2310 (eval-when (:compile-toplevel :execute)
2311 (defun bit-test-inst-printer-list (subop)
2312 `((ext-reg/mem-imm ((op (#b1011101 ,subop))
2313 (reg/mem nil :type reg/mem)
2314 (imm nil :type imm-byte)
2316 (ext-reg-reg/mem ((op ,(dpb subop (byte 3 2) #b1000001))
2318 (:name :tab reg/mem ", " reg)))))
2320 (define-instruction bt (segment src index)
2321 (:printer-list (bit-test-inst-printer-list #b100))
2323 (emit-bit-test-and-mumble segment src index #b100)))
2325 (define-instruction btc (segment src index)
2326 (:printer-list (bit-test-inst-printer-list #b111))
2328 (emit-bit-test-and-mumble segment src index #b111)))
2330 (define-instruction btr (segment src index)
2331 (:printer-list (bit-test-inst-printer-list #b110))
2333 (emit-bit-test-and-mumble segment src index #b110)))
2335 (define-instruction bts (segment src index)
2336 (:printer-list (bit-test-inst-printer-list #b101))
2338 (emit-bit-test-and-mumble segment src index #b101)))
2341 ;;;; control transfer
2343 (define-instruction call (segment where)
2344 (:printer near-jump ((op #b11101000)))
2345 (:printer reg/mem-default-qword ((op '(#b11111111 #b010))))
2346 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b010))))
2350 (emit-byte segment #b11101000) ; 32 bit relative
2351 (emit-back-patch segment
2353 (lambda (segment posn)
2355 (- (label-position where)
2358 (emit-byte segment #b11101000)
2359 (emit-relative-fixup segment where))
2361 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2362 (emit-byte segment #b11111111)
2363 (emit-ea segment where #b010)))))
2365 (defun emit-byte-displacement-backpatch (segment target)
2366 (emit-back-patch segment
2368 (lambda (segment posn)
2369 (let ((disp (- (label-position target) (1+ posn))))
2370 (aver (<= -128 disp 127))
2371 (emit-byte segment disp)))))
2373 (define-instruction jmp (segment cond &optional where)
2374 ;; conditional jumps
2375 (:printer short-cond-jump ((op #b0111)) '('j cc :tab label))
2376 (:printer near-cond-jump () '('j cc :tab label))
2377 ;; unconditional jumps
2378 (:printer short-jump ((op #b1011)))
2379 (:printer near-jump ((op #b11101001)) )
2380 (:printer reg/mem-default-qword ((op '(#b11111111 #b100))))
2381 (:printer rex-reg/mem-default-qword ((op '(#b11111111 #b100))))
2386 (lambda (segment posn delta-if-after)
2387 (let ((disp (- (label-position where posn delta-if-after)
2389 (when (<= -128 disp 127)
2391 (dpb (conditional-opcode cond)
2394 (emit-byte-displacement-backpatch segment where)
2396 (lambda (segment posn)
2397 (let ((disp (- (label-position where) (+ posn 6))))
2398 (emit-byte segment #b00001111)
2400 (dpb (conditional-opcode cond)
2403 (emit-dword segment disp)))))
2404 ((label-p (setq where cond))
2407 (lambda (segment posn delta-if-after)
2408 (let ((disp (- (label-position where posn delta-if-after)
2410 (when (<= -128 disp 127)
2411 (emit-byte segment #b11101011)
2412 (emit-byte-displacement-backpatch segment where)
2414 (lambda (segment posn)
2415 (let ((disp (- (label-position where) (+ posn 5))))
2416 (emit-byte segment #b11101001)
2417 (emit-dword segment disp)))))
2419 (emit-byte segment #b11101001)
2420 (emit-relative-fixup segment where))
2422 (unless (or (ea-p where) (tn-p where))
2423 (error "don't know what to do with ~A" where))
2424 ;; near jump defaults to 64 bit
2425 ;; w-bit in rex prefix is unnecessary
2426 (maybe-emit-rex-for-ea segment where nil :operand-size :do-not-set)
2427 (emit-byte segment #b11111111)
2428 (emit-ea segment where #b100)))))
2430 (define-instruction jmp-short (segment label)
2432 (emit-byte segment #b11101011)
2433 (emit-byte-displacement-backpatch segment label)))
2435 (define-instruction ret (segment &optional stack-delta)
2436 (:printer byte ((op #b11000011)))
2437 (:printer byte ((op #b11000010) (imm nil :type 'imm-word-16))
2441 (emit-byte segment #b11000010)
2442 (emit-word segment stack-delta))
2444 (emit-byte segment #b11000011)))))
2446 (define-instruction jecxz (segment target)
2447 (:printer short-jump ((op #b0011)))
2449 (emit-byte segment #b11100011)
2450 (emit-byte-displacement-backpatch segment target)))
2452 (define-instruction loop (segment target)
2453 (:printer short-jump ((op #b0010)))
2455 (emit-byte segment #b11100010) ; pfw this was 11100011, or jecxz!!!!
2456 (emit-byte-displacement-backpatch segment target)))
2458 (define-instruction loopz (segment target)
2459 (:printer short-jump ((op #b0001)))
2461 (emit-byte segment #b11100001)
2462 (emit-byte-displacement-backpatch segment target)))
2464 (define-instruction loopnz (segment target)
2465 (:printer short-jump ((op #b0000)))
2467 (emit-byte segment #b11100000)
2468 (emit-byte-displacement-backpatch segment target)))
2470 ;;;; conditional move
2471 (define-instruction cmov (segment cond dst src)
2472 (:printer cond-move ())
2473 (:printer rex-cond-move ())
2475 (aver (register-p dst))
2476 (let ((size (matching-operand-size dst src)))
2477 (aver (or (eq size :word) (eq size :dword) (eq size :qword) ))
2478 (maybe-emit-operand-size-prefix segment size))
2479 (maybe-emit-rex-for-ea segment src dst)
2480 (emit-byte segment #b00001111)
2481 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b01000000))
2482 (emit-ea segment src (reg-tn-encoding dst))))
2484 ;;;; conditional byte set
2486 (define-instruction set (segment dst cond)
2487 (:printer cond-set ())
2489 (maybe-emit-rex-for-ea segment dst nil)
2490 (emit-byte segment #b00001111)
2491 (emit-byte segment (dpb (conditional-opcode cond) (byte 4 0) #b10010000))
2492 (emit-ea segment dst #b000)))
2496 (define-instruction enter (segment disp &optional (level 0))
2497 (:declare (type (unsigned-byte 16) disp)
2498 (type (unsigned-byte 8) level))
2499 (:printer enter-format ((op #b11001000)))
2501 (emit-byte segment #b11001000)
2502 (emit-word segment disp)
2503 (emit-byte segment level)))
2505 (define-instruction leave (segment)
2506 (:printer byte ((op #b11001001)))
2508 (emit-byte segment #b11001001)))
2510 ;;;; interrupt instructions
2512 (defun snarf-error-junk (sap offset &optional length-only)
2513 (let* ((length (sb!sys:sap-ref-8 sap offset))
2514 (vector (make-array length :element-type '(unsigned-byte 8))))
2515 (declare (type sb!sys:system-area-pointer sap)
2516 (type (unsigned-byte 8) length)
2517 (type (simple-array (unsigned-byte 8) (*)) vector))
2519 (values 0 (1+ length) nil nil))
2521 (sb!kernel:copy-ub8-from-system-area sap (1+ offset)
2523 (collect ((sc-offsets)
2525 (lengths 1) ; the length byte
2527 (error-number (sb!c:read-var-integer vector index)))
2530 (when (>= index length)
2532 (let ((old-index index))
2533 (sc-offsets (sb!c:read-var-integer vector index))
2534 (lengths (- index old-index))))
2535 (values error-number
2541 (defmacro break-cases (breaknum &body cases)
2542 (let ((bn-temp (gensym)))
2543 (collect ((clauses))
2544 (dolist (case cases)
2545 (clauses `((= ,bn-temp ,(car case)) ,@(cdr case))))
2546 `(let ((,bn-temp ,breaknum))
2547 (cond ,@(clauses))))))
2550 (defun break-control (chunk inst stream dstate)
2551 (declare (ignore inst))
2552 (flet ((nt (x) (if stream (sb!disassem:note x dstate))))
2553 ;; FIXME: Make sure that BYTE-IMM-CODE is defined. The genesis
2554 ;; map has it undefined; and it should be easier to look in the target
2555 ;; Lisp (with (DESCRIBE 'BYTE-IMM-CODE)) than to definitively deduce
2556 ;; from first principles whether it's defined in some way that genesis
2558 (case (byte-imm-code chunk dstate)
2561 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2564 (sb!disassem:handle-break-args #'snarf-error-junk stream dstate))
2566 (nt "breakpoint trap"))
2567 (#.pending-interrupt-trap
2568 (nt "pending interrupt trap"))
2571 (#.fun-end-breakpoint-trap
2572 (nt "function end breakpoint trap")))))
2574 (define-instruction break (segment code)
2575 (:declare (type (unsigned-byte 8) code))
2576 (:printer byte-imm ((op #b11001100)) '(:name :tab code)
2577 :control #'break-control)
2579 (emit-byte segment #b11001100)
2580 (emit-byte segment code)))
2582 (define-instruction int (segment number)
2583 (:declare (type (unsigned-byte 8) number))
2584 (:printer byte-imm ((op #b11001101)))
2588 (emit-byte segment #b11001100))
2590 (emit-byte segment #b11001101)
2591 (emit-byte segment number)))))
2593 (define-instruction into (segment)
2594 (:printer byte ((op #b11001110)))
2596 (emit-byte segment #b11001110)))
2598 (define-instruction bound (segment reg bounds)
2600 (let ((size (matching-operand-size reg bounds)))
2601 (when (eq size :byte)
2602 (error "can't bounds-test bytes: ~S" reg))
2603 (maybe-emit-operand-size-prefix segment size)
2604 (maybe-emit-rex-for-ea segment bounds reg)
2605 (emit-byte segment #b01100010)
2606 (emit-ea segment bounds (reg-tn-encoding reg)))))
2608 (define-instruction iret (segment)
2609 (:printer byte ((op #b11001111)))
2611 (emit-byte segment #b11001111)))
2613 ;;;; processor control
2615 (define-instruction hlt (segment)
2616 (:printer byte ((op #b11110100)))
2618 (emit-byte segment #b11110100)))
2620 (define-instruction nop (segment)
2621 (:printer byte ((op #b10010000)))
2623 (emit-byte segment #b10010000)))
2625 (define-instruction wait (segment)
2626 (:printer byte ((op #b10011011)))
2628 (emit-byte segment #b10011011)))
2630 (define-instruction lock (segment)
2631 (:printer byte ((op #b11110000)))
2633 (emit-byte segment #b11110000)))
2635 ;;;; miscellaneous hackery
2637 (define-instruction byte (segment byte)
2639 (emit-byte segment byte)))
2641 (define-instruction word (segment word)
2643 (emit-word segment word)))
2645 (define-instruction dword (segment dword)
2647 (emit-dword segment dword)))
2649 (defun emit-header-data (segment type)
2650 (emit-back-patch segment
2652 (lambda (segment posn)
2656 (component-header-length))
2660 (define-instruction simple-fun-header-word (segment)
2662 (emit-header-data segment simple-fun-header-widetag)))
2664 (define-instruction lra-header-word (segment)
2666 (emit-header-data segment return-pc-header-widetag)))
2668 ;;;; fp instructions
2670 ;;;; Note: We treat the single-precision and double-precision variants
2671 ;;;; as separate instructions.
2673 ;;; Load single to st(0).
2674 (define-instruction fld (segment source)
2675 (:printer floating-point ((op '(#b001 #b000))))
2677 (and (not (fp-reg-tn-p source))
2678 (maybe-emit-rex-for-ea segment source nil))
2679 (emit-byte segment #b11011001)
2680 (emit-fp-op segment source #b000)))
2682 ;;; Load double to st(0).
2683 (define-instruction fldd (segment source)
2684 (:printer floating-point ((op '(#b101 #b000))))
2685 (:printer floating-point-fp ((op '(#b001 #b000))))
2687 (if (fp-reg-tn-p source)
2688 (emit-byte segment #b11011001)
2690 (maybe-emit-rex-for-ea segment source nil)
2691 (emit-byte segment #b11011101)))
2692 (emit-fp-op segment source #b000)))
2694 ;;; Load long to st(0).
2695 (define-instruction fldl (segment source)
2696 (:printer floating-point ((op '(#b011 #b101))))
2698 (and (not (fp-reg-tn-p source))
2699 (maybe-emit-rex-for-ea segment source nil))
2700 (emit-byte segment #b11011011)
2701 (emit-fp-op segment source #b101)))
2703 ;;; Store single from st(0).
2704 (define-instruction fst (segment dest)
2705 (:printer floating-point ((op '(#b001 #b010))))
2707 (cond ((fp-reg-tn-p dest)
2708 (emit-byte segment #b11011101)
2709 (emit-fp-op segment dest #b010))
2711 (maybe-emit-rex-for-ea segment dest nil)
2712 (emit-byte segment #b11011001)
2713 (emit-fp-op segment dest #b010)))))
2715 ;;; Store double from st(0).
2716 (define-instruction fstd (segment dest)
2717 (:printer floating-point ((op '(#b101 #b010))))
2718 (:printer floating-point-fp ((op '(#b101 #b010))))
2720 (cond ((fp-reg-tn-p dest)
2721 (emit-byte segment #b11011101)
2722 (emit-fp-op segment dest #b010))
2724 (maybe-emit-rex-for-ea segment dest nil)
2725 (emit-byte segment #b11011101)
2726 (emit-fp-op segment dest #b010)))))
2728 ;;; Arithmetic ops are all done with at least one operand at top of
2729 ;;; stack. The other operand is is another register or a 32/64 bit
2732 ;;; dtc: I've tried to follow the Intel ASM386 conventions, but note
2733 ;;; that these conflict with the Gdb conventions for binops. To reduce
2734 ;;; the confusion I've added comments showing the mathamatical
2735 ;;; operation and the two syntaxes. By the ASM386 convention the
2736 ;;; instruction syntax is:
2739 ;;; or Fop Destination, Source
2741 ;;; If only one operand is given then it is the source and the
2742 ;;; destination is ST(0). There are reversed forms of the fsub and
2743 ;;; fdiv instructions inducated by an 'R' suffix.
2745 ;;; The mathematical operation for the non-reverse form is always:
2746 ;;; destination = destination op source
2748 ;;; For the reversed form it is:
2749 ;;; destination = source op destination
2751 ;;; The instructions below only accept one operand at present which is
2752 ;;; usually the source. I've hack in extra instructions to implement
2753 ;;; the fops with a ST(i) destination, these have a -sti suffix and
2754 ;;; the operand is the destination with the source being ST(0).
2757 ;;; st(0) = st(0) + memory or st(i).
2758 (define-instruction fadd (segment source)
2759 (:printer floating-point ((op '(#b000 #b000))))
2761 (and (not (fp-reg-tn-p source))
2762 (maybe-emit-rex-for-ea segment source nil))
2763 (emit-byte segment #b11011000)
2764 (emit-fp-op segment source #b000)))
2767 ;;; st(0) = st(0) + memory or st(i).
2768 (define-instruction faddd (segment source)
2769 (:printer floating-point ((op '(#b100 #b000))))
2770 (:printer floating-point-fp ((op '(#b000 #b000))))
2772 (and (not (fp-reg-tn-p source))
2773 (maybe-emit-rex-for-ea segment source nil))
2774 (if (fp-reg-tn-p source)
2775 (emit-byte segment #b11011000)
2776 (emit-byte segment #b11011100))
2777 (emit-fp-op segment source #b000)))
2779 ;;; Add double destination st(i):
2780 ;;; st(i) = st(0) + st(i).
2781 (define-instruction fadd-sti (segment destination)
2782 (:printer floating-point-fp ((op '(#b100 #b000))))
2784 (aver (fp-reg-tn-p destination))
2785 (emit-byte segment #b11011100)
2786 (emit-fp-op segment destination #b000)))
2788 (define-instruction faddp-sti (segment destination)
2789 (:printer floating-point-fp ((op '(#b110 #b000))))
2791 (aver (fp-reg-tn-p destination))
2792 (emit-byte segment #b11011110)
2793 (emit-fp-op segment destination #b000)))
2795 ;;; Subtract single:
2796 ;;; st(0) = st(0) - memory or st(i).
2797 (define-instruction fsub (segment source)
2798 (:printer floating-point ((op '(#b000 #b100))))
2800 (and (not (fp-reg-tn-p source))
2801 (maybe-emit-rex-for-ea segment source nil))
2802 (emit-byte segment #b11011000)
2803 (emit-fp-op segment source #b100)))
2805 ;;; Subtract single, reverse:
2806 ;;; st(0) = memory or st(i) - st(0).
2807 (define-instruction fsubr (segment source)
2808 (:printer floating-point ((op '(#b000 #b101))))
2810 (and (not (fp-reg-tn-p source))
2811 (maybe-emit-rex-for-ea segment source nil))
2812 (emit-byte segment #b11011000)
2813 (emit-fp-op segment source #b101)))
2815 ;;; Subtract double:
2816 ;;; st(0) = st(0) - memory or st(i).
2817 (define-instruction fsubd (segment source)
2818 (:printer floating-point ((op '(#b100 #b100))))
2819 (:printer floating-point-fp ((op '(#b000 #b100))))
2821 (if (fp-reg-tn-p source)
2822 (emit-byte segment #b11011000)
2824 (and (not (fp-reg-tn-p source))
2825 (maybe-emit-rex-for-ea segment source nil))
2826 (emit-byte segment #b11011100)))
2827 (emit-fp-op segment source #b100)))
2829 ;;; Subtract double, reverse:
2830 ;;; st(0) = memory or st(i) - st(0).
2831 (define-instruction fsubrd (segment source)
2832 (:printer floating-point ((op '(#b100 #b101))))
2833 (:printer floating-point-fp ((op '(#b000 #b101))))
2835 (if (fp-reg-tn-p source)
2836 (emit-byte segment #b11011000)
2838 (and (not (fp-reg-tn-p source))
2839 (maybe-emit-rex-for-ea segment source nil))
2840 (emit-byte segment #b11011100)))
2841 (emit-fp-op segment source #b101)))
2843 ;;; Subtract double, destination st(i):
2844 ;;; st(i) = st(i) - st(0).
2846 ;;; ASM386 syntax: FSUB ST(i), ST
2847 ;;; Gdb syntax: fsubr %st,%st(i)
2848 (define-instruction fsub-sti (segment destination)
2849 (:printer floating-point-fp ((op '(#b100 #b101))))
2851 (aver (fp-reg-tn-p destination))
2852 (emit-byte segment #b11011100)
2853 (emit-fp-op segment destination #b101)))
2855 (define-instruction fsubp-sti (segment destination)
2856 (:printer floating-point-fp ((op '(#b110 #b101))))
2858 (aver (fp-reg-tn-p destination))
2859 (emit-byte segment #b11011110)
2860 (emit-fp-op segment destination #b101)))
2862 ;;; Subtract double, reverse, destination st(i):
2863 ;;; st(i) = st(0) - st(i).
2865 ;;; ASM386 syntax: FSUBR ST(i), ST
2866 ;;; Gdb syntax: fsub %st,%st(i)
2867 (define-instruction fsubr-sti (segment destination)
2868 (:printer floating-point-fp ((op '(#b100 #b100))))
2870 (aver (fp-reg-tn-p destination))
2871 (emit-byte segment #b11011100)
2872 (emit-fp-op segment destination #b100)))
2874 (define-instruction fsubrp-sti (segment destination)
2875 (:printer floating-point-fp ((op '(#b110 #b100))))
2877 (aver (fp-reg-tn-p destination))
2878 (emit-byte segment #b11011110)
2879 (emit-fp-op segment destination #b100)))
2881 ;;; Multiply single:
2882 ;;; st(0) = st(0) * memory or st(i).
2883 (define-instruction fmul (segment source)
2884 (:printer floating-point ((op '(#b000 #b001))))
2886 (and (not (fp-reg-tn-p source))
2887 (maybe-emit-rex-for-ea segment source nil))
2888 (emit-byte segment #b11011000)
2889 (emit-fp-op segment source #b001)))
2891 ;;; Multiply double:
2892 ;;; st(0) = st(0) * memory or st(i).
2893 (define-instruction fmuld (segment source)
2894 (:printer floating-point ((op '(#b100 #b001))))
2895 (:printer floating-point-fp ((op '(#b000 #b001))))
2897 (if (fp-reg-tn-p source)
2898 (emit-byte segment #b11011000)
2900 (and (not (fp-reg-tn-p source))
2901 (maybe-emit-rex-for-ea segment source nil))
2902 (emit-byte segment #b11011100)))
2903 (emit-fp-op segment source #b001)))
2905 ;;; Multiply double, destination st(i):
2906 ;;; st(i) = st(i) * st(0).
2907 (define-instruction fmul-sti (segment destination)
2908 (:printer floating-point-fp ((op '(#b100 #b001))))
2910 (aver (fp-reg-tn-p destination))
2911 (emit-byte segment #b11011100)
2912 (emit-fp-op segment destination #b001)))
2915 ;;; st(0) = st(0) / memory or st(i).
2916 (define-instruction fdiv (segment source)
2917 (:printer floating-point ((op '(#b000 #b110))))
2919 (and (not (fp-reg-tn-p source))
2920 (maybe-emit-rex-for-ea segment source nil))
2921 (emit-byte segment #b11011000)
2922 (emit-fp-op segment source #b110)))
2924 ;;; Divide single, reverse:
2925 ;;; st(0) = memory or st(i) / st(0).
2926 (define-instruction fdivr (segment source)
2927 (:printer floating-point ((op '(#b000 #b111))))
2929 (and (not (fp-reg-tn-p source))
2930 (maybe-emit-rex-for-ea segment source nil))
2931 (emit-byte segment #b11011000)
2932 (emit-fp-op segment source #b111)))
2935 ;;; st(0) = st(0) / memory or st(i).
2936 (define-instruction fdivd (segment source)
2937 (:printer floating-point ((op '(#b100 #b110))))
2938 (:printer floating-point-fp ((op '(#b000 #b110))))
2940 (if (fp-reg-tn-p source)
2941 (emit-byte segment #b11011000)
2943 (and (not (fp-reg-tn-p source))
2944 (maybe-emit-rex-for-ea segment source nil))
2945 (emit-byte segment #b11011100)))
2946 (emit-fp-op segment source #b110)))
2948 ;;; Divide double, reverse:
2949 ;;; st(0) = memory or st(i) / st(0).
2950 (define-instruction fdivrd (segment source)
2951 (:printer floating-point ((op '(#b100 #b111))))
2952 (:printer floating-point-fp ((op '(#b000 #b111))))
2954 (if (fp-reg-tn-p source)
2955 (emit-byte segment #b11011000)
2957 (and (not (fp-reg-tn-p source))
2958 (maybe-emit-rex-for-ea segment source nil))
2959 (emit-byte segment #b11011100)))
2960 (emit-fp-op segment source #b111)))
2962 ;;; Divide double, destination st(i):
2963 ;;; st(i) = st(i) / st(0).
2965 ;;; ASM386 syntax: FDIV ST(i), ST
2966 ;;; Gdb syntax: fdivr %st,%st(i)
2967 (define-instruction fdiv-sti (segment destination)
2968 (:printer floating-point-fp ((op '(#b100 #b111))))
2970 (aver (fp-reg-tn-p destination))
2971 (emit-byte segment #b11011100)
2972 (emit-fp-op segment destination #b111)))
2974 ;;; Divide double, reverse, destination st(i):
2975 ;;; st(i) = st(0) / st(i).
2977 ;;; ASM386 syntax: FDIVR ST(i), ST
2978 ;;; Gdb syntax: fdiv %st,%st(i)
2979 (define-instruction fdivr-sti (segment destination)
2980 (:printer floating-point-fp ((op '(#b100 #b110))))
2982 (aver (fp-reg-tn-p destination))
2983 (emit-byte segment #b11011100)
2984 (emit-fp-op segment destination #b110)))
2986 ;;; Exchange fr0 with fr(n). (There is no double precision variant.)
2987 (define-instruction fxch (segment source)
2988 (:printer floating-point-fp ((op '(#b001 #b001))))
2990 (unless (and (tn-p source)
2991 (eq (sb-name (sc-sb (tn-sc source))) 'float-registers))
2993 (emit-byte segment #b11011001)
2994 (emit-fp-op segment source #b001)))
2996 ;;; Push 32-bit integer to st0.
2997 (define-instruction fild (segment source)
2998 (:printer floating-point ((op '(#b011 #b000))))
3000 (and (not (fp-reg-tn-p source))
3001 (maybe-emit-rex-for-ea segment source nil))
3002 (emit-byte segment #b11011011)
3003 (emit-fp-op segment source #b000)))
3005 ;;; Push 64-bit integer to st0.
3006 (define-instruction fildl (segment source)
3007 (:printer floating-point ((op '(#b111 #b101))))
3009 (and (not (fp-reg-tn-p source))
3010 (maybe-emit-rex-for-ea segment source nil))
3011 (emit-byte segment #b11011111)
3012 (emit-fp-op segment source #b101)))
3014 ;;; Store 32-bit integer.
3015 (define-instruction fist (segment dest)
3016 (:printer floating-point ((op '(#b011 #b010))))
3018 (and (not (fp-reg-tn-p dest))
3019 (maybe-emit-rex-for-ea segment dest nil))
3020 (emit-byte segment #b11011011)
3021 (emit-fp-op segment dest #b010)))
3023 ;;; Store and pop 32-bit integer.
3024 (define-instruction fistp (segment dest)
3025 (:printer floating-point ((op '(#b011 #b011))))
3027 (and (not (fp-reg-tn-p dest))
3028 (maybe-emit-rex-for-ea segment dest nil))
3029 (emit-byte segment #b11011011)
3030 (emit-fp-op segment dest #b011)))
3032 ;;; Store and pop 64-bit integer.
3033 (define-instruction fistpl (segment dest)
3034 (:printer floating-point ((op '(#b111 #b111))))
3036 (and (not (fp-reg-tn-p dest))
3037 (maybe-emit-rex-for-ea segment dest nil))
3038 (emit-byte segment #b11011111)
3039 (emit-fp-op segment dest #b111)))
3041 ;;; Store single from st(0) and pop.
3042 (define-instruction fstp (segment dest)
3043 (:printer floating-point ((op '(#b001 #b011))))
3045 (cond ((fp-reg-tn-p dest)
3046 (emit-byte segment #b11011101)
3047 (emit-fp-op segment dest #b011))
3049 (maybe-emit-rex-for-ea segment dest nil)
3050 (emit-byte segment #b11011001)
3051 (emit-fp-op segment dest #b011)))))
3053 ;;; Store double from st(0) and pop.
3054 (define-instruction fstpd (segment dest)
3055 (:printer floating-point ((op '(#b101 #b011))))
3056 (:printer floating-point-fp ((op '(#b101 #b011))))
3058 (cond ((fp-reg-tn-p dest)
3059 (emit-byte segment #b11011101)
3060 (emit-fp-op segment dest #b011))
3062 (maybe-emit-rex-for-ea segment dest nil)
3063 (emit-byte segment #b11011101)
3064 (emit-fp-op segment dest #b011)))))
3066 ;;; Store long from st(0) and pop.
3067 (define-instruction fstpl (segment dest)
3068 (:printer floating-point ((op '(#b011 #b111))))
3070 (and (not (fp-reg-tn-p dest))
3071 (maybe-emit-rex-for-ea segment dest nil))
3072 (emit-byte segment #b11011011)
3073 (emit-fp-op segment dest #b111)))
3075 ;;; Decrement stack-top pointer.
3076 (define-instruction fdecstp (segment)
3077 (:printer floating-point-no ((op #b10110)))
3079 (emit-byte segment #b11011001)
3080 (emit-byte segment #b11110110)))
3082 ;;; Increment stack-top pointer.
3083 (define-instruction fincstp (segment)
3084 (:printer floating-point-no ((op #b10111)))
3086 (emit-byte segment #b11011001)
3087 (emit-byte segment #b11110111)))
3089 ;;; Free fp register.
3090 (define-instruction ffree (segment dest)
3091 (:printer floating-point-fp ((op '(#b101 #b000))))
3093 (and (not (fp-reg-tn-p dest))
3094 (maybe-emit-rex-for-ea segment dest nil))
3095 (emit-byte segment #b11011101)
3096 (emit-fp-op segment dest #b000)))
3098 (define-instruction fabs (segment)
3099 (:printer floating-point-no ((op #b00001)))
3101 (emit-byte segment #b11011001)
3102 (emit-byte segment #b11100001)))
3104 (define-instruction fchs (segment)
3105 (:printer floating-point-no ((op #b00000)))
3107 (emit-byte segment #b11011001)
3108 (emit-byte segment #b11100000)))
3110 (define-instruction frndint(segment)
3111 (:printer floating-point-no ((op #b11100)))
3113 (emit-byte segment #b11011001)
3114 (emit-byte segment #b11111100)))
3117 (define-instruction fninit(segment)
3118 (:printer floating-point-5 ((op #b00011)))
3120 (emit-byte segment #b11011011)
3121 (emit-byte segment #b11100011)))
3123 ;;; Store Status Word to AX.
3124 (define-instruction fnstsw(segment)
3125 (:printer floating-point-st ((op #b00000)))
3127 (emit-byte segment #b11011111)
3128 (emit-byte segment #b11100000)))
3130 ;;; Load Control Word.
3132 ;;; src must be a memory location
3133 (define-instruction fldcw(segment src)
3134 (:printer floating-point ((op '(#b001 #b101))))
3136 (and (not (fp-reg-tn-p src))
3137 (maybe-emit-rex-for-ea segment src nil))
3138 (emit-byte segment #b11011001)
3139 (emit-fp-op segment src #b101)))
3141 ;;; Store Control Word.
3142 (define-instruction fnstcw(segment dst)
3143 (:printer floating-point ((op '(#b001 #b111))))
3145 (and (not (fp-reg-tn-p dst))
3146 (maybe-emit-rex-for-ea segment dst nil))
3147 (emit-byte segment #b11011001)
3148 (emit-fp-op segment dst #b111)))
3150 ;;; Store FP Environment.
3151 (define-instruction fstenv(segment dst)
3152 (:printer floating-point ((op '(#b001 #b110))))
3154 (and (not (fp-reg-tn-p dst))
3155 (maybe-emit-rex-for-ea segment dst nil))
3156 (emit-byte segment #b11011001)
3157 (emit-fp-op segment dst #b110)))
3159 ;;; Restore FP Environment.
3160 (define-instruction fldenv(segment src)
3161 (:printer floating-point ((op '(#b001 #b100))))
3163 (and (not (fp-reg-tn-p src))
3164 (maybe-emit-rex-for-ea segment src nil))
3165 (emit-byte segment #b11011001)
3166 (emit-fp-op segment src #b100)))
3169 (define-instruction fsave(segment dst)
3170 (:printer floating-point ((op '(#b101 #b110))))
3172 (and (not (fp-reg-tn-p dst))
3173 (maybe-emit-rex-for-ea segment dst nil))
3174 (emit-byte segment #b11011101)
3175 (emit-fp-op segment dst #b110)))
3177 ;;; Restore FP State.
3178 (define-instruction frstor(segment src)
3179 (:printer floating-point ((op '(#b101 #b100))))
3181 (and (not (fp-reg-tn-p src))
3182 (maybe-emit-rex-for-ea segment src nil))
3183 (emit-byte segment #b11011101)
3184 (emit-fp-op segment src #b100)))
3186 ;;; Clear exceptions.
3187 (define-instruction fnclex(segment)
3188 (:printer floating-point-5 ((op #b00010)))
3190 (emit-byte segment #b11011011)
3191 (emit-byte segment #b11100010)))
3194 (define-instruction fcom (segment src)
3195 (:printer floating-point ((op '(#b000 #b010))))
3197 (and (not (fp-reg-tn-p src))
3198 (maybe-emit-rex-for-ea segment src nil))
3199 (emit-byte segment #b11011000)
3200 (emit-fp-op segment src #b010)))
3202 (define-instruction fcomd (segment src)
3203 (:printer floating-point ((op '(#b100 #b010))))
3204 (:printer floating-point-fp ((op '(#b000 #b010))))
3206 (if (fp-reg-tn-p src)
3207 (emit-byte segment #b11011000)
3209 (maybe-emit-rex-for-ea segment src nil)
3210 (emit-byte segment #b11011100)))
3211 (emit-fp-op segment src #b010)))
3213 ;;; Compare ST1 to ST0, popping the stack twice.
3214 (define-instruction fcompp (segment)
3215 (:printer floating-point-3 ((op '(#b110 #b011001))))
3217 (emit-byte segment #b11011110)
3218 (emit-byte segment #b11011001)))
3220 ;;; unordered comparison
3221 (define-instruction fucom (segment src)
3222 (:printer floating-point-fp ((op '(#b101 #b100))))
3224 (aver (fp-reg-tn-p src))
3225 (emit-byte segment #b11011101)
3226 (emit-fp-op segment src #b100)))
3228 (define-instruction ftst (segment)
3229 (:printer floating-point-no ((op #b00100)))
3231 (emit-byte segment #b11011001)
3232 (emit-byte segment #b11100100)))
3236 (define-instruction fsqrt(segment)
3237 (:printer floating-point-no ((op #b11010)))
3239 (emit-byte segment #b11011001)
3240 (emit-byte segment #b11111010)))
3242 (define-instruction fscale(segment)
3243 (:printer floating-point-no ((op #b11101)))
3245 (emit-byte segment #b11011001)
3246 (emit-byte segment #b11111101)))
3248 (define-instruction fxtract(segment)
3249 (:printer floating-point-no ((op #b10100)))
3251 (emit-byte segment #b11011001)
3252 (emit-byte segment #b11110100)))
3254 (define-instruction fsin(segment)
3255 (:printer floating-point-no ((op #b11110)))
3257 (emit-byte segment #b11011001)
3258 (emit-byte segment #b11111110)))
3260 (define-instruction fcos(segment)
3261 (:printer floating-point-no ((op #b11111)))
3263 (emit-byte segment #b11011001)
3264 (emit-byte segment #b11111111)))
3266 (define-instruction fprem1(segment)
3267 (:printer floating-point-no ((op #b10101)))
3269 (emit-byte segment #b11011001)
3270 (emit-byte segment #b11110101)))
3272 (define-instruction fprem(segment)
3273 (:printer floating-point-no ((op #b11000)))
3275 (emit-byte segment #b11011001)
3276 (emit-byte segment #b11111000)))
3278 (define-instruction fxam (segment)
3279 (:printer floating-point-no ((op #b00101)))
3281 (emit-byte segment #b11011001)
3282 (emit-byte segment #b11100101)))
3284 ;;; These do push/pop to stack and need special handling
3285 ;;; in any VOPs that use them. See the book.
3287 ;;; st0 <- st1*log2(st0)
3288 (define-instruction fyl2x(segment) ; pops stack
3289 (:printer floating-point-no ((op #b10001)))
3291 (emit-byte segment #b11011001)
3292 (emit-byte segment #b11110001)))
3294 (define-instruction fyl2xp1(segment)
3295 (:printer floating-point-no ((op #b11001)))
3297 (emit-byte segment #b11011001)
3298 (emit-byte segment #b11111001)))
3300 (define-instruction f2xm1(segment)
3301 (:printer floating-point-no ((op #b10000)))
3303 (emit-byte segment #b11011001)
3304 (emit-byte segment #b11110000)))
3306 (define-instruction fptan(segment) ; st(0) <- 1; st(1) <- tan
3307 (:printer floating-point-no ((op #b10010)))
3309 (emit-byte segment #b11011001)
3310 (emit-byte segment #b11110010)))
3312 (define-instruction fpatan(segment) ; POPS STACK
3313 (:printer floating-point-no ((op #b10011)))
3315 (emit-byte segment #b11011001)
3316 (emit-byte segment #b11110011)))
3318 ;;;; loading constants
3320 (define-instruction fldz(segment)
3321 (:printer floating-point-no ((op #b01110)))
3323 (emit-byte segment #b11011001)
3324 (emit-byte segment #b11101110)))
3326 (define-instruction fld1(segment)
3327 (:printer floating-point-no ((op #b01000)))
3329 (emit-byte segment #b11011001)
3330 (emit-byte segment #b11101000)))
3332 (define-instruction fldpi(segment)
3333 (:printer floating-point-no ((op #b01011)))
3335 (emit-byte segment #b11011001)
3336 (emit-byte segment #b11101011)))
3338 (define-instruction fldl2t(segment)
3339 (:printer floating-point-no ((op #b01001)))
3341 (emit-byte segment #b11011001)
3342 (emit-byte segment #b11101001)))
3344 (define-instruction fldl2e(segment)
3345 (:printer floating-point-no ((op #b01010)))
3347 (emit-byte segment #b11011001)
3348 (emit-byte segment #b11101010)))
3350 (define-instruction fldlg2(segment)
3351 (:printer floating-point-no ((op #b01100)))
3353 (emit-byte segment #b11011001)
3354 (emit-byte segment #b11101100)))
3356 (define-instruction fldln2(segment)
3357 (:printer floating-point-no ((op #b01101)))
3359 (emit-byte segment #b11011001)
3360 (emit-byte segment #b11101101)))
3362 ;; new xmm insns required by sse float
3363 ;; movsd andpd comisd comiss
3365 (define-instruction movsd (segment dst src)
3366 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3368 (cond ((typep src 'tn)
3369 (emit-byte segment #xf2)
3370 (maybe-emit-rex-for-ea segment dst src)
3371 (emit-byte segment #x0f)
3372 (emit-byte segment #x11)
3373 (emit-ea segment dst (reg-tn-encoding src)))
3375 (emit-byte segment #xf2)
3376 (maybe-emit-rex-for-ea segment src dst)
3377 (emit-byte segment #x0f)
3378 (emit-byte segment #x10)
3379 (emit-ea segment src (reg-tn-encoding dst))))))
3381 (define-instruction movss (segment dst src)
3382 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3385 (emit-byte segment #xf3)
3386 (maybe-emit-rex-for-ea segment dst src)
3387 (emit-byte segment #x0f)
3388 (emit-byte segment #x11)
3389 (emit-ea segment dst (reg-tn-encoding src)))
3391 (emit-byte segment #xf3)
3392 (maybe-emit-rex-for-ea segment src dst)
3393 (emit-byte segment #x0f)
3394 (emit-byte segment #x10)
3395 (emit-ea segment src (reg-tn-encoding dst))))))
3397 (define-instruction andpd (segment dst src)
3398 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3400 (emit-byte segment #x66)
3401 (maybe-emit-rex-for-ea segment src dst)
3402 (emit-byte segment #x0f)
3403 (emit-byte segment #x54)
3404 (emit-ea segment src (reg-tn-encoding dst))))
3406 (define-instruction andps (segment dst src)
3408 (maybe-emit-rex-for-ea segment src dst)
3409 (emit-byte segment #x0f)
3410 (emit-byte segment #x54)
3411 (emit-ea segment src (reg-tn-encoding dst))))
3413 (define-instruction comisd (segment dst src)
3414 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3416 (emit-byte segment #x66)
3417 (maybe-emit-rex-for-ea segment src dst)
3418 (emit-byte segment #x0f)
3419 (emit-byte segment #x2f)
3420 (emit-ea segment src (reg-tn-encoding dst))))
3422 (define-instruction comiss (segment dst src)
3423 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3425 (maybe-emit-rex-for-ea segment src dst)
3426 (emit-byte segment #x0f)
3427 (emit-byte segment #x2f)
3428 (emit-ea segment src (reg-tn-encoding dst))))
3430 ;; movd movq xorp xord
3432 ;; we only do the xmm version of movd
3433 (define-instruction movd (segment dst src)
3434 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3436 (cond ((fp-reg-tn-p dst)
3437 (emit-byte segment #x66)
3438 (maybe-emit-rex-for-ea segment src dst)
3439 (emit-byte segment #x0f)
3440 (emit-byte segment #x6e)
3441 (emit-ea segment src (reg-tn-encoding dst)))
3443 (aver (fp-reg-tn-p src))
3444 (emit-byte segment #x66)
3445 (maybe-emit-rex-for-ea segment dst src)
3446 (emit-byte segment #x0f)
3447 (emit-byte segment #x7e)
3448 (emit-ea segment dst (reg-tn-encoding src))))))
3450 (define-instruction movq (segment dst src)
3451 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3453 (cond ((fp-reg-tn-p dst)
3454 (emit-byte segment #xf3)
3455 (maybe-emit-rex-for-ea segment src dst)
3456 (emit-byte segment #x0f)
3457 (emit-byte segment #x7e)
3458 (emit-ea segment src (reg-tn-encoding dst)))
3460 (aver (fp-reg-tn-p src))
3461 (emit-byte segment #x66)
3462 (maybe-emit-rex-for-ea segment dst src)
3463 (emit-byte segment #x0f)
3464 (emit-byte segment #xd6)
3465 (emit-ea segment dst (reg-tn-encoding src))))))
3467 (define-instruction xorpd (segment dst src)
3468 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3470 (emit-byte segment #x66)
3471 (maybe-emit-rex-for-ea segment src dst)
3472 (emit-byte segment #x0f)
3473 (emit-byte segment #x57)
3474 (emit-ea segment src (reg-tn-encoding dst))))
3476 (define-instruction xorps (segment dst src)
3477 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3479 (maybe-emit-rex-for-ea segment src dst)
3480 (emit-byte segment #x0f)
3481 (emit-byte segment #x57)
3482 (emit-ea segment src (reg-tn-encoding dst))))
3484 (define-instruction cvtsd2si (segment dst src)
3485 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3487 (emit-byte segment #xf2)
3488 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3489 (emit-byte segment #x0f)
3490 (emit-byte segment #x2d)
3491 (emit-ea segment src (reg-tn-encoding dst))))
3493 (define-instruction cvtsd2ss (segment dst src)
3494 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3496 (emit-byte segment #xf2)
3497 (maybe-emit-rex-for-ea segment src dst)
3498 (emit-byte segment #x0f)
3499 (emit-byte segment #x5a)
3500 (emit-ea segment src (reg-tn-encoding dst))))
3502 (define-instruction cvtss2si (segment dst src)
3503 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3505 (emit-byte segment #xf3)
3506 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3507 (emit-byte segment #x0f)
3508 (emit-byte segment #x2d)
3509 (emit-ea segment src (reg-tn-encoding dst))))
3511 (define-instruction cvtss2sd (segment dst src)
3512 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3514 (emit-byte segment #xf3)
3515 (maybe-emit-rex-for-ea segment src dst)
3516 (emit-byte segment #x0f)
3517 (emit-byte segment #x5a)
3518 (emit-ea segment src (reg-tn-encoding dst))))
3520 (define-instruction cvtsi2ss (segment dst src)
3521 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3523 (emit-byte segment #xf3)
3524 (maybe-emit-rex-for-ea segment src dst)
3525 (emit-byte segment #x0f)
3526 (emit-byte segment #x2a)
3527 (emit-ea segment src (reg-tn-encoding dst))))
3529 (define-instruction cvtsi2sd (segment dst src)
3530 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3532 (emit-byte segment #xf2)
3533 (maybe-emit-rex-for-ea segment src dst)
3534 (emit-byte segment #x0f)
3535 (emit-byte segment #x2a)
3536 (emit-ea segment src (reg-tn-encoding dst))))
3538 (define-instruction cvtdq2pd (segment dst src)
3539 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3541 (emit-byte segment #xf3)
3542 (maybe-emit-rex-for-ea segment src dst)
3543 (emit-byte segment #x0f)
3544 (emit-byte segment #xe6)
3545 (emit-ea segment src (reg-tn-encoding dst))))
3547 (define-instruction cvtdq2ps (segment dst src)
3548 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3550 (maybe-emit-rex-for-ea segment src dst)
3551 (emit-byte segment #x0f)
3552 (emit-byte segment #x5b)
3553 (emit-ea segment src (reg-tn-encoding dst))))
3555 ;; CVTTSD2SI CVTTSS2SI
3557 (define-instruction cvttsd2si (segment dst src)
3558 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3560 (emit-byte segment #xf2)
3561 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3562 (emit-byte segment #x0f)
3563 (emit-byte segment #x2c)
3564 (emit-ea segment src (reg-tn-encoding dst))))
3566 (define-instruction cvttss2si (segment dst src)
3567 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3569 (emit-byte segment #xf3)
3570 (maybe-emit-rex-for-ea segment src dst :operand-size :qword)
3571 (emit-byte segment #x0f)
3572 (emit-byte segment #x2c)
3573 (emit-ea segment src (reg-tn-encoding dst))))
3575 (define-instruction addsd (segment dst src)
3576 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3578 (emit-byte segment #xf2)
3579 (maybe-emit-rex-for-ea segment src dst)
3580 (emit-byte segment #x0f)
3581 (emit-byte segment #x58)
3582 (emit-ea segment src (reg-tn-encoding dst))))
3584 (define-instruction addss (segment dst src)
3585 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3587 (emit-byte segment #xf3)
3588 (maybe-emit-rex-for-ea segment src dst)
3589 (emit-byte segment #x0f)
3590 (emit-byte segment #x58)
3591 (emit-ea segment src (reg-tn-encoding dst))))
3593 (define-instruction divsd (segment dst src)
3594 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3596 (emit-byte segment #xf2)
3597 (maybe-emit-rex-for-ea segment src dst)
3598 (emit-byte segment #x0f)
3599 (emit-byte segment #x5e)
3600 (emit-ea segment src (reg-tn-encoding dst))))
3602 (define-instruction divss (segment dst src)
3603 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3605 (emit-byte segment #xf3)
3606 (maybe-emit-rex-for-ea segment src dst)
3607 (emit-byte segment #x0f)
3608 (emit-byte segment #x5e)
3609 (emit-ea segment src (reg-tn-encoding dst))))
3611 (define-instruction mulsd (segment dst src)
3612 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3614 (emit-byte segment #xf2)
3615 (maybe-emit-rex-for-ea segment src dst)
3616 (emit-byte segment #x0f)
3617 (emit-byte segment #x59)
3618 (emit-ea segment src (reg-tn-encoding dst))))
3620 (define-instruction mulss (segment dst src)
3621 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3623 (emit-byte segment #xf3)
3624 (maybe-emit-rex-for-ea segment src dst)
3625 (emit-byte segment #x0f)
3626 (emit-byte segment #x59)
3627 (emit-ea segment src (reg-tn-encoding dst))))
3629 (define-instruction subsd (segment dst src)
3630 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3632 (emit-byte segment #xf2)
3633 (maybe-emit-rex-for-ea segment src dst)
3634 (emit-byte segment #x0f)
3635 (emit-byte segment #x5c)
3636 (emit-ea segment src (reg-tn-encoding dst))))
3638 (define-instruction subss (segment dst src)
3639 ; (:printer reg-reg/mem ((op #x10) (width 1))) ;wrong
3641 (emit-byte segment #xf3)
3642 (maybe-emit-rex-for-ea segment src dst)
3643 (emit-byte segment #x0f)
3644 (emit-byte segment #x5c)
3645 (emit-ea segment src (reg-tn-encoding dst))))
3647 (define-instruction ldmxcsr (segment src)
3649 (emit-byte segment #x0f)
3650 (emit-byte segment #xae)
3651 (emit-ea segment src 2)))
3653 (define-instruction stmxcsr (segment dst)
3655 (emit-byte segment #x0f)
3656 (emit-byte segment #xae)
3657 (emit-ea segment dst 3)))