1 ! Copyright (C) 2005, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors assocs alien alien.c-types arrays strings
4 cpu.x86.assembler cpu.x86.assembler.private cpu.x86.assembler.operands
5 cpu.architecture kernel kernel.private math memory namespaces make
6 sequences words system layouts combinators math.order fry locals
7 compiler.constants byte-arrays
9 compiler.cfg.instructions
10 compiler.cfg.intrinsics
11 compiler.cfg.comparisons
12 compiler.cfg.stack-frame
14 compiler.codegen.fixup ;
17 << enable-fixnum-log2 >>
19 ! Add some methods to the assembler to be more useful to the backend
20 M: label JMP 0 JMP rc-relative label-fixup ;
21 M: label JUMPcc [ 0 ] dip JUMPcc rc-relative label-fixup ;
23 M: x86 two-operand? t ;
25 HOOK: stack-reg cpu ( -- reg )
27 HOOK: reserved-area-size cpu ( -- n )
29 : stack@ ( n -- op ) stack-reg swap [+] ;
31 : param@ ( n -- op ) reserved-area-size + stack@ ;
33 : spill@ ( n -- op ) spill-offset param@ ;
35 : gc-root@ ( n -- op ) gc-root-offset param@ ;
37 : decr-stack-reg ( n -- )
38 dup 0 = [ drop ] [ stack-reg swap SUB ] if ;
40 : incr-stack-reg ( n -- )
41 dup 0 = [ drop ] [ stack-reg swap ADD ] if ;
43 : align-stack ( n -- n' )
44 os macosx? cpu x86.64? or [ 16 align ] when ;
46 M: x86 stack-frame-size ( stack-frame -- i )
47 (stack-frame-size) 3 cells reserved-area-size + + align-stack ;
49 ! Must be a volatile register not used for parameter passing, for safe
50 ! use in calls in and out of C
51 HOOK: temp-reg cpu ( -- reg )
53 ! Fastcall calling convention
54 HOOK: param-reg-1 cpu ( -- reg )
55 HOOK: param-reg-2 cpu ( -- reg )
57 HOOK: pic-tail-reg cpu ( -- reg )
59 M: x86 %load-immediate dup 0 = [ drop dup XOR ] [ MOV ] if ;
61 M: x86 %load-reference swap 0 MOV rc-absolute-cell rel-immediate ;
63 HOOK: ds-reg cpu ( -- reg )
64 HOOK: rs-reg cpu ( -- reg )
66 : reg-stack ( n reg -- op ) swap cells neg [+] ;
68 GENERIC: loc>operand ( loc -- operand )
70 M: ds-loc loc>operand n>> ds-reg reg-stack ;
71 M: rs-loc loc>operand n>> rs-reg reg-stack ;
73 M: x86 %peek loc>operand MOV ;
74 M: x86 %replace loc>operand swap MOV ;
75 : (%inc) ( n reg -- ) swap cells dup 0 > [ ADD ] [ neg SUB ] if ; inline
76 M: x86 %inc-d ( n -- ) ds-reg (%inc) ;
77 M: x86 %inc-r ( n -- ) rs-reg (%inc) ;
79 M: x86 %call ( word -- ) 0 CALL rc-relative rel-word-pic ;
81 : xt-tail-pic-offset ( -- n )
82 #! See the comment in vm/cpu-x86.hpp
85 M: x86 %jump ( word -- )
86 pic-tail-reg 0 MOV xt-tail-pic-offset rc-absolute-cell rel-here
87 0 JMP rc-relative rel-word-pic-tail ;
89 M: x86 %jump-label ( label -- ) 0 JMP rc-relative label-fixup ;
91 M: x86 %return ( -- ) 0 RET ;
93 : code-alignment ( align -- n )
94 [ building get length dup ] dip align swap - ;
99 :: (%slot) ( obj slot tag temp -- op )
100 temp slot obj [+] LEA
101 temp tag neg [+] ; inline
103 :: (%slot-imm) ( obj slot tag -- op )
104 obj slot cells tag - [+] ; inline
106 M: x86 %slot ( dst obj slot tag temp -- ) (%slot) MOV ;
107 M: x86 %slot-imm ( dst obj slot tag -- ) (%slot-imm) MOV ;
108 M: x86 %set-slot ( src obj slot tag temp -- ) (%slot) swap MOV ;
109 M: x86 %set-slot-imm ( src obj slot tag -- ) (%slot-imm) swap MOV ;
111 M: x86 %add 2over eq? [ nip ADD ] [ [+] LEA ] if ;
112 M: x86 %add-imm 2over eq? [ nip ADD ] [ [+] LEA ] if ;
113 M: x86 %sub nip SUB ;
114 M: x86 %sub-imm 2over eq? [ nip SUB ] [ neg [+] LEA ] if ;
115 M: x86 %mul nip swap IMUL2 ;
116 M: x86 %mul-imm IMUL3 ;
117 M: x86 %and nip AND ;
118 M: x86 %and-imm nip AND ;
120 M: x86 %or-imm nip OR ;
121 M: x86 %xor nip XOR ;
122 M: x86 %xor-imm nip XOR ;
123 M: x86 %shl-imm nip SHL ;
124 M: x86 %shr-imm nip SHR ;
125 M: x86 %sar-imm nip SAR ;
127 M: x86 %min nip [ CMP ] [ CMOVG ] 2bi ;
128 M: x86 %max nip [ CMP ] [ CMOVL ] 2bi ;
130 M: x86 %not drop NOT ;
133 GENERIC: copy-register* ( dst src rep -- )
135 M: int-rep copy-register* drop MOV ;
136 M: tagged-rep copy-register* drop MOV ;
137 M: float-rep copy-register* drop MOVSS ;
138 M: double-rep copy-register* drop MOVSD ;
139 M: float-4-rep copy-register* drop MOVUPS ;
140 M: double-2-rep copy-register* drop MOVUPD ;
141 M: vector-rep copy-register* drop MOVDQU ;
143 : copy-register ( dst src rep -- )
144 2over eq? [ 3drop ] [ copy-register* ] if ;
146 M: x86 %copy ( dst src rep -- ) copy-register ;
148 :: overflow-template ( label dst src1 src2 insn -- )
152 M: x86 %fixnum-add ( label dst src1 src2 -- )
153 [ ADD ] overflow-template ;
155 M: x86 %fixnum-sub ( label dst src1 src2 -- )
156 [ SUB ] overflow-template ;
158 M: x86 %fixnum-mul ( label dst src1 src2 -- )
159 [ swap IMUL2 ] overflow-template ;
161 : bignum@ ( reg n -- op )
162 cells bignum tag-number - [+] ; inline
164 M:: x86 %integer>bignum ( dst src temp -- )
165 #! on entry, inreg is a signed 32-bit quantity
166 #! exits with tagged ptr to bignum in outreg
167 #! 1 cell header, 1 cell length, 1 cell sign, + digits
168 #! length is the # of digits + sign
171 ! Load cached zero value
172 dst 0 >bignum %load-reference
174 ! Is it zero? Then just go to the end and return this zero
177 dst 4 cells bignum temp %allot
179 dst 1 bignum@ 2 tag-fixnum MOV
181 dst 3 bignum@ src MOV
184 temp cell-bits 1 - SAR
187 dst 2 bignum@ temp MOV
188 ! Make negative value positive
194 dst 3 bignum@ temp MOV
198 M:: x86 %bignum>integer ( dst src temp -- )
202 temp src 1 bignum@ MOV
203 ! if the length is 1, its just the sign and nothing else,
206 temp 1 tag-fixnum CMP
209 dst src 3 bignum@ MOV
211 temp src 2 bignum@ MOV
212 ! convert it into -1 or 1
221 M: x86 %add-float nip ADDSD ;
222 M: x86 %sub-float nip SUBSD ;
223 M: x86 %mul-float nip MULSD ;
224 M: x86 %div-float nip DIVSD ;
225 M: x86 %min-float nip MINSD ;
226 M: x86 %max-float nip MAXSD ;
227 M: x86 %sqrt SQRTSD ;
229 M: x86 %single>double-float CVTSS2SD ;
230 M: x86 %double>single-float CVTSD2SS ;
232 M: x86 %integer>float CVTSI2SD ;
233 M: x86 %float>integer CVTTSD2SI ;
235 M: x86 %unbox-float ( dst src -- )
236 float-offset [+] MOVSD ;
238 M:: x86 %box-float ( dst src temp -- )
239 dst 16 float temp %allot
240 dst float-offset [+] src MOVSD ;
242 M:: x86 %box-vector ( dst src rep temp -- )
243 dst rep rep-size 2 cells + byte-array temp %allot
244 16 tag-fixnum dst 1 byte-array tag-number %set-slot-imm
245 dst byte-array-offset [+]
246 src rep copy-register ;
248 M:: x86 %unbox-vector ( dst src rep -- )
249 dst src byte-array-offset [+]
252 M: x86 %broadcast-vector ( dst src rep -- )
254 { float-4-rep [ [ MOVSS ] [ drop dup 0 SHUFPS ] 2bi ] }
255 { double-2-rep [ [ MOVSD ] [ drop dup UNPCKLPD ] 2bi ] }
258 M:: x86 %gather-vector-4 ( dst src1 src2 src3 src4 rep -- )
271 M:: x86 %gather-vector-2 ( dst src1 src2 rep -- )
282 M: x86 %add-vector ( dst src1 src2 rep -- )
284 { float-4-rep [ ADDPS ] }
285 { double-2-rep [ ADDPD ] }
286 { char-16-rep [ PADDB ] }
287 { uchar-16-rep [ PADDB ] }
288 { short-8-rep [ PADDW ] }
289 { ushort-8-rep [ PADDW ] }
290 { int-4-rep [ PADDD ] }
291 { uint-4-rep [ PADDD ] }
294 M: x86 %sub-vector ( dst src1 src2 rep -- )
296 { float-4-rep [ SUBPS ] }
297 { double-2-rep [ SUBPD ] }
298 { char-16-rep [ PSUBB ] }
299 { uchar-16-rep [ PSUBB ] }
300 { short-8-rep [ PSUBW ] }
301 { ushort-8-rep [ PSUBW ] }
302 { int-4-rep [ PSUBD ] }
303 { uint-4-rep [ PSUBD ] }
306 M: x86 %mul-vector ( dst src1 src2 rep -- )
308 { float-4-rep [ MULPS ] }
309 { double-2-rep [ MULPD ] }
310 { int-4-rep [ PMULLW ] }
313 M: x86 %div-vector ( dst src1 src2 rep -- )
315 { float-4-rep [ DIVPS ] }
316 { double-2-rep [ DIVPD ] }
319 M: x86 %min-vector ( dst src1 src2 rep -- )
321 { float-4-rep [ MINPS ] }
322 { double-2-rep [ MINPD ] }
325 M: x86 %max-vector ( dst src1 src2 rep -- )
327 { float-4-rep [ MAXPS ] }
328 { double-2-rep [ MAXPD ] }
331 M: x86 %sqrt-vector ( dst src rep -- )
333 { float-4-rep [ SQRTPS ] }
334 { double-2-rep [ SQRTPD ] }
337 M: x86 %horizontal-add-vector ( dst src rep -- )
339 { float-4-rep [ [ MOVAPS ] [ HADDPS ] [ HADDPS ] 2tri ] }
340 { double-2-rep [ [ MOVAPD ] [ HADDPD ] 2bi ] }
343 M: x86 %unbox-alien ( dst src -- )
344 alien-offset [+] MOV ;
346 M:: x86 %unbox-any-c-ptr ( dst src temp -- )
348 { "is-byte-array" "end" "start" } [ define-label ] each
351 ! We come back here with displaced aliens
352 "start" resolve-label
354 temp \ f tag-number CMP
356 ! Is the object an alien?
357 temp header-offset [+] alien type-number tag-fixnum CMP
358 "is-byte-array" get JNE
359 ! If so, load the offset and add it to the address
360 dst temp alien-offset [+] ADD
361 ! Now recurse on the underlying alien
362 temp temp underlying-alien-offset [+] MOV
364 "is-byte-array" resolve-label
365 ! Add byte array address to address being computed
367 ! Add an offset to start of byte array's data
368 dst byte-array-offset ADD
372 : alien@ ( reg n -- op ) cells alien tag-number - [+] ;
374 :: %allot-alien ( dst displacement base temp -- )
375 dst 4 cells alien temp %allot
376 dst 1 alien@ base MOV ! alien
377 dst 2 alien@ \ f tag-number MOV ! expired
378 dst 3 alien@ displacement MOV ! displacement
381 M:: x86 %box-alien ( dst src temp -- )
384 dst \ f tag-number MOV
387 dst src \ f tag-number temp %allot-alien
391 M:: x86 %box-displaced-alien ( dst displacement base displacement' base' base-class -- )
395 ! If displacement is zero, return the base
399 ! Quickly use displacement' before its needed for real, as allot temporary
400 dst 4 cells alien displacement' %allot
401 ! If base is already a displaced alien, unpack it
403 displacement' displacement MOV
404 base \ f tag-number CMP
406 base header-offset [+] alien type-number tag-fixnum CMP
408 ! displacement += base.displacement
409 displacement' base 3 alien@ ADD
411 base' base 1 alien@ MOV
413 dst 1 alien@ base' MOV ! alien
414 dst 2 alien@ \ f tag-number MOV ! expired
415 dst 3 alien@ displacement' MOV ! displacement
419 ! The 'small-reg' mess is pretty crappy, but its only used on x86-32.
420 ! On x86-64, all registers have 8-bit versions. However, a similar
421 ! problem arises for shifts, where the shift count must be in CL, and
422 ! so one day I will fix this properly by adding precoloring to the
423 ! register allocator.
425 HOOK: has-small-reg? cpu ( reg size -- ? )
427 CONSTANT: have-byte-regs { EAX ECX EDX EBX }
429 M: x86.32 has-small-reg?
431 { 8 [ have-byte-regs memq? ] }
436 M: x86.64 has-small-reg? 2drop t ;
438 : small-reg-that-isn't ( exclude -- reg' )
439 [ have-byte-regs ] dip
440 [ native-version-of ] map
441 '[ _ memq? not ] find nip ;
443 : with-save/restore ( reg quot -- )
444 [ drop PUSH ] [ call ] [ drop POP ] 2tri ; inline
446 :: with-small-register ( dst exclude size quot: ( new-dst -- ) -- )
447 ! If the destination register overlaps a small register with
448 ! 'size' bits, we call the quot with that. Otherwise, we find a
449 ! small register that is not in exclude, and call quot, saving and
450 ! restoring the small register.
451 dst size has-small-reg? [ dst quot call ] [
452 exclude small-reg-that-isn't
453 [ quot call ] with-save/restore
456 : ?MOV ( dst src -- )
457 2dup = [ 2drop ] [ MOV ] if ; inline
459 M:: x86 %string-nth ( dst src index temp -- )
460 ! We request a small-reg of size 8 since those of size 16 are
463 dst { src index temp } 8 [| new-dst |
464 ! Load the least significant 7 bits into new-dst.
465 ! 8th bit indicates whether we have to load from
466 ! the aux vector or not.
467 temp src index [+] LEA
468 new-dst 8-bit-version-of temp string-offset [+] MOV
469 new-dst new-dst 8-bit-version-of MOVZX
470 ! Do we have to look at the aux vector?
473 ! Yes, this is a non-ASCII character. Load aux vector
474 temp src string-aux-offset [+] MOV
480 new-dst 16-bit-version-of new-dst byte-array-offset [+] MOV
481 new-dst new-dst 16-bit-version-of MOVZX
487 ] with-small-register ;
489 M:: x86 %set-string-nth-fast ( ch str index temp -- )
490 ch { index str temp } 8 [| new-ch |
492 temp str index [+] LEA
493 temp string-offset [+] new-ch 8-bit-version-of MOV
494 ] with-small-register ;
496 :: %alien-integer-getter ( dst src size quot -- )
497 dst { src } size [| new-dst |
498 new-dst dup size n-bit-version-of dup src [] MOV
501 ] with-small-register ; inline
503 : %alien-unsigned-getter ( dst src size -- )
504 [ MOVZX ] %alien-integer-getter ; inline
506 M: x86 %alien-unsigned-1 8 %alien-unsigned-getter ;
507 M: x86 %alien-unsigned-2 16 %alien-unsigned-getter ;
508 M: x86 %alien-unsigned-4 32 [ 2drop ] %alien-integer-getter ;
510 : %alien-signed-getter ( dst src size -- )
511 [ MOVSX ] %alien-integer-getter ; inline
513 M: x86 %alien-signed-1 8 %alien-signed-getter ;
514 M: x86 %alien-signed-2 16 %alien-signed-getter ;
515 M: x86 %alien-signed-4 32 %alien-signed-getter ;
517 M: x86 %alien-cell [] MOV ;
518 M: x86 %alien-float [] MOVSS ;
519 M: x86 %alien-double [] MOVSD ;
520 M: x86 %alien-vector [ [] ] dip copy-register ;
522 :: %alien-integer-setter ( ptr value size -- )
523 value { ptr } size [| new-value |
525 ptr [] new-value size n-bit-version-of MOV
526 ] with-small-register ; inline
528 M: x86 %set-alien-integer-1 8 %alien-integer-setter ;
529 M: x86 %set-alien-integer-2 16 %alien-integer-setter ;
530 M: x86 %set-alien-integer-4 32 %alien-integer-setter ;
531 M: x86 %set-alien-cell [ [] ] dip MOV ;
532 M: x86 %set-alien-float [ [] ] dip MOVSS ;
533 M: x86 %set-alien-double [ [] ] dip MOVSD ;
534 M: x86 %set-alien-vector [ [] ] 2dip copy-register ;
536 : shift-count? ( reg -- ? ) { ECX RCX } memq? ;
538 :: emit-shift ( dst src1 src2 quot -- )
547 ECX native-version-of [
549 drop dst CL quot call
554 M: x86 %shl [ SHL ] emit-shift ;
555 M: x86 %shr [ SHR ] emit-shift ;
556 M: x86 %sar [ SAR ] emit-shift ;
558 : load-zone-ptr ( reg -- )
559 #! Load pointer to start of zone array
560 0 MOV "nursery" f rc-absolute-cell rel-dlsym ;
562 : load-allot-ptr ( nursery-ptr allot-ptr -- )
563 [ drop load-zone-ptr ] [ swap cell [+] MOV ] 2bi ;
565 : inc-allot-ptr ( nursery-ptr n -- )
566 [ cell [+] ] dip 8 align ADD ;
568 : store-header ( temp class -- )
569 [ [] ] [ type-number tag-fixnum ] bi* MOV ;
571 : store-tagged ( dst tag -- )
574 M:: x86 %allot ( dst size class nursery-ptr -- )
575 nursery-ptr dst load-allot-ptr
576 dst class store-header
577 dst class store-tagged
578 nursery-ptr size inc-allot-ptr ;
580 M:: x86 %write-barrier ( src card# table -- )
581 #! Mark the card pointed to by vreg.
585 table "cards_offset" f %alien-global
587 table card# [+] card-mark <byte> MOV
590 card# deck-bits card-bits - SHR
591 table "decks_offset" f %alien-global
593 table card# [+] card-mark <byte> MOV ;
595 M:: x86 %check-nursery ( label temp1 temp2 -- )
597 temp2 temp1 cell [+] MOV
599 temp1 temp1 3 cells [+] MOV
603 M: x86 %save-gc-root ( gc-root register -- ) [ gc-root@ ] dip MOV ;
605 M: x86 %load-gc-root ( gc-root register -- ) swap gc-root@ MOV ;
607 M:: x86 %call-gc ( gc-root-count -- )
608 ! Pass pointer to start of GC roots as first parameter
609 param-reg-1 gc-root-base param@ LEA
610 ! Pass number of roots as second parameter
611 param-reg-2 gc-root-count MOV
613 "inline_gc" f %alien-invoke ;
616 [ 0 MOV ] 2dip rc-absolute-cell rel-dlsym ;
618 M: x86 %epilogue ( n -- ) cell - incr-stack-reg ;
620 :: %boolean ( dst temp word -- )
621 dst \ f tag-number MOV
622 temp 0 MOV \ t rc-absolute-cell rel-immediate
623 dst temp word execute ; inline
625 M:: x86 %compare ( dst src1 src2 cc temp -- )
628 { cc< [ dst temp \ CMOVL %boolean ] }
629 { cc<= [ dst temp \ CMOVLE %boolean ] }
630 { cc> [ dst temp \ CMOVG %boolean ] }
631 { cc>= [ dst temp \ CMOVGE %boolean ] }
632 { cc= [ dst temp \ CMOVE %boolean ] }
633 { cc/= [ dst temp \ CMOVNE %boolean ] }
636 M: x86 %compare-imm ( dst src1 src2 cc temp -- )
639 : %cmov-float= ( dst src -- )
641 "no-move" define-label
643 "no-move" get [ JNE ] [ JP ] bi
645 "no-move" resolve-label
648 : %cmov-float/= ( dst src -- )
650 "no-move" define-label
657 "no-move" resolve-label
660 :: (%compare-float) ( dst src1 src2 cc temp compare -- )
662 { cc< [ src2 src1 \ compare execute( a b -- ) dst temp \ CMOVA %boolean ] }
663 { cc<= [ src2 src1 \ compare execute( a b -- ) dst temp \ CMOVAE %boolean ] }
664 { cc> [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVA %boolean ] }
665 { cc>= [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVAE %boolean ] }
666 { cc= [ src1 src2 \ compare execute( a b -- ) dst temp \ %cmov-float= %boolean ] }
667 { cc<> [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVNE %boolean ] }
668 { cc<>= [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVNP %boolean ] }
669 { cc/< [ src2 src1 \ compare execute( a b -- ) dst temp \ CMOVBE %boolean ] }
670 { cc/<= [ src2 src1 \ compare execute( a b -- ) dst temp \ CMOVB %boolean ] }
671 { cc/> [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVBE %boolean ] }
672 { cc/>= [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVB %boolean ] }
673 { cc/= [ src1 src2 \ compare execute( a b -- ) dst temp \ %cmov-float/= %boolean ] }
674 { cc/<> [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVE %boolean ] }
675 { cc/<>= [ src1 src2 \ compare execute( a b -- ) dst temp \ CMOVP %boolean ] }
678 M: x86 %compare-float-ordered ( dst src1 src2 cc temp -- )
679 \ COMISD (%compare-float) ;
681 M: x86 %compare-float-unordered ( dst src1 src2 cc temp -- )
682 \ UCOMISD (%compare-float) ;
684 M:: x86 %compare-branch ( label src1 src2 cc -- )
688 { cc<= [ label JLE ] }
690 { cc>= [ label JGE ] }
692 { cc/= [ label JNE ] }
695 M: x86 %compare-imm-branch ( label src1 src2 cc -- )
698 : %jump-float= ( label -- )
700 "no-jump" define-label
703 "no-jump" resolve-label
706 : %jump-float/= ( label -- )
709 :: (%compare-float-branch) ( label src1 src2 cc compare -- )
711 { cc< [ src2 src1 \ compare execute( a b -- ) label JA ] }
712 { cc<= [ src2 src1 \ compare execute( a b -- ) label JAE ] }
713 { cc> [ src1 src2 \ compare execute( a b -- ) label JA ] }
714 { cc>= [ src1 src2 \ compare execute( a b -- ) label JAE ] }
715 { cc= [ src1 src2 \ compare execute( a b -- ) label %jump-float= ] }
716 { cc<> [ src1 src2 \ compare execute( a b -- ) label JNE ] }
717 { cc<>= [ src1 src2 \ compare execute( a b -- ) label JNP ] }
718 { cc/< [ src2 src1 \ compare execute( a b -- ) label JBE ] }
719 { cc/<= [ src2 src1 \ compare execute( a b -- ) label JB ] }
720 { cc/> [ src1 src2 \ compare execute( a b -- ) label JBE ] }
721 { cc/>= [ src1 src2 \ compare execute( a b -- ) label JB ] }
722 { cc/= [ src1 src2 \ compare execute( a b -- ) label %jump-float/= ] }
723 { cc/<> [ src1 src2 \ compare execute( a b -- ) label JE ] }
724 { cc/<>= [ src1 src2 \ compare execute( a b -- ) label JP ] }
727 M: x86 %compare-float-ordered-branch ( label src1 src2 cc -- )
728 \ COMISD (%compare-float-branch) ;
730 M: x86 %compare-float-unordered-branch ( label src1 src2 cc -- )
731 \ UCOMISD (%compare-float-branch) ;
733 M:: x86 %spill ( src rep n -- )
734 n spill@ src rep copy-register ;
736 M:: x86 %reload ( dst rep n -- )
737 dst n spill@ rep copy-register ;
739 M: x86 %loop-entry 16 code-alignment [ NOP ] times ;
741 M:: x86 %save-context ( temp1 temp2 callback-allowed? -- )
742 #! Save Factor stack pointers in case the C code calls a
743 #! callback which does a GC, which must reliably trace
745 temp1 "stack_chain" f %alien-global
747 temp2 stack-reg cell neg [+] LEA
750 temp1 2 cells [+] ds-reg MOV
751 temp1 3 cells [+] rs-reg MOV
754 M: x86 value-struct? drop t ;
756 M: x86 small-enough? ( n -- ? )
757 HEX: -80000000 HEX: 7fffffff between? ;
759 : next-stack@ ( n -- operand )
760 #! nth parameter from the next stack frame. Used to box
761 #! input values to callbacks; the callback has its own
762 #! stack frame set up, and we want to read the frame
763 #! set up by the caller.
764 stack-frame get total-size>> + stack@ ;
767 enable-float-intrinsics