1 ! Copyright (C) 2005, 2008 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
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 ;
126 M: x86 %not drop NOT ;
129 :: overflow-template ( label dst src1 src2 insn -- )
133 M: x86 %fixnum-add ( label dst src1 src2 -- )
134 [ ADD ] overflow-template ;
136 M: x86 %fixnum-sub ( label dst src1 src2 -- )
137 [ SUB ] overflow-template ;
139 M: x86 %fixnum-mul ( label dst src1 src2 -- )
140 [ swap IMUL2 ] overflow-template ;
142 : bignum@ ( reg n -- op )
143 cells bignum tag-number - [+] ; inline
145 M:: x86 %integer>bignum ( dst src temp -- )
146 #! on entry, inreg is a signed 32-bit quantity
147 #! exits with tagged ptr to bignum in outreg
148 #! 1 cell header, 1 cell length, 1 cell sign, + digits
149 #! length is the # of digits + sign
152 ! Load cached zero value
153 dst 0 >bignum %load-reference
155 ! Is it zero? Then just go to the end and return this zero
158 dst 4 cells bignum temp %allot
160 dst 1 bignum@ 2 tag-fixnum MOV
162 dst 3 bignum@ src MOV
165 temp cell-bits 1 - SAR
168 dst 2 bignum@ temp MOV
169 ! Make negative value positive
175 dst 3 bignum@ temp MOV
179 M:: x86 %bignum>integer ( dst src temp -- )
183 temp src 1 bignum@ MOV
184 ! if the length is 1, its just the sign and nothing else,
187 temp 1 tag-fixnum CMP
190 dst src 3 bignum@ MOV
192 temp src 2 bignum@ MOV
193 ! convert it into -1 or 1
202 M: x86 %add-float nip ADDSD ;
203 M: x86 %sub-float nip SUBSD ;
204 M: x86 %mul-float nip MULSD ;
205 M: x86 %div-float nip DIVSD ;
207 M: x86 %integer>float CVTSI2SD ;
208 M: x86 %float>integer CVTTSD2SI ;
210 GENERIC: copy-register* ( dst src rep -- )
212 M: int-rep copy-register* drop MOV ;
213 M: tagged-rep copy-register* drop MOV ;
214 M: single-float-rep copy-register* drop MOVSS ;
215 M: double-float-rep copy-register* drop MOVSD ;
217 : copy-register ( dst src rep -- )
218 2over eq? [ 3drop ] [ copy-register* ] if ;
220 M: x86 %copy ( dst src rep -- ) copy-register ;
222 M: x86 %unbox-float ( dst src -- )
223 float-offset [+] MOVSD ;
225 M:: x86 %unbox-any-c-ptr ( dst src temp -- )
227 { "is-byte-array" "end" "start" } [ define-label ] each
230 ! We come back here with displaced aliens
231 "start" resolve-label
233 temp \ f tag-number CMP
235 ! Is the object an alien?
236 temp header-offset [+] alien type-number tag-fixnum CMP
237 "is-byte-array" get JNE
238 ! If so, load the offset and add it to the address
239 dst temp alien-offset [+] ADD
240 ! Now recurse on the underlying alien
241 temp temp underlying-alien-offset [+] MOV
243 "is-byte-array" resolve-label
244 ! Add byte array address to address being computed
246 ! Add an offset to start of byte array's data
247 dst byte-array-offset ADD
251 M:: x86 %box-float ( dst src temp -- )
252 dst 16 float temp %allot
253 dst float-offset [+] src MOVSD ;
255 : alien@ ( reg n -- op ) cells alien tag-number - [+] ;
257 M:: x86 %box-alien ( dst src temp -- )
260 dst \ f tag-number MOV
263 dst 4 cells alien temp %allot
264 dst 1 alien@ \ f tag-number MOV
265 dst 2 alien@ \ f tag-number MOV
266 ! Store src in alien-offset slot
271 ! The 'small-reg' mess is pretty crappy, but its only used on x86-32.
272 ! On x86-64, all registers have 8-bit versions. However, a similar
273 ! problem arises for shifts, where the shift count must be in CL, and
274 ! so one day I will fix this properly by adding precoloring to the
275 ! register allocator.
277 HOOK: has-small-reg? cpu ( reg size -- ? )
279 CONSTANT: have-byte-regs { EAX ECX EDX EBX }
281 M: x86.32 has-small-reg?
283 { 8 [ have-byte-regs memq? ] }
288 M: x86.64 has-small-reg? 2drop t ;
290 : small-reg-that-isn't ( exclude -- reg' )
291 [ have-byte-regs ] dip
292 [ native-version-of ] map
293 '[ _ memq? not ] find nip ;
295 : with-save/restore ( reg quot -- )
296 [ drop PUSH ] [ call ] [ drop POP ] 2tri ; inline
298 :: with-small-register ( dst exclude size quot: ( new-dst -- ) -- )
299 ! If the destination register overlaps a small register with
300 ! 'size' bits, we call the quot with that. Otherwise, we find a
301 ! small register that is not in exclude, and call quot, saving and
302 ! restoring the small register.
303 dst size has-small-reg? [ dst quot call ] [
304 exclude small-reg-that-isn't
305 [ quot call ] with-save/restore
308 : ?MOV ( dst src -- )
309 2dup = [ 2drop ] [ MOV ] if ; inline
311 M:: x86 %string-nth ( dst src index temp -- )
312 ! We request a small-reg of size 8 since those of size 16 are
315 dst { src index temp } 8 [| new-dst |
316 ! Load the least significant 7 bits into new-dst.
317 ! 8th bit indicates whether we have to load from
318 ! the aux vector or not.
319 temp src index [+] LEA
320 new-dst 8-bit-version-of temp string-offset [+] MOV
321 new-dst new-dst 8-bit-version-of MOVZX
322 ! Do we have to look at the aux vector?
325 ! Yes, this is a non-ASCII character. Load aux vector
326 temp src string-aux-offset [+] MOV
332 new-dst 16-bit-version-of new-dst byte-array-offset [+] MOV
333 new-dst new-dst 16-bit-version-of MOVZX
339 ] with-small-register ;
341 M:: x86 %set-string-nth-fast ( ch str index temp -- )
342 ch { index str temp } 8 [| new-ch |
344 temp str index [+] LEA
345 temp string-offset [+] new-ch 8-bit-version-of MOV
346 ] with-small-register ;
348 :: %alien-integer-getter ( dst src size quot -- )
349 dst { src } size [| new-dst |
350 new-dst dup size n-bit-version-of dup src [] MOV
353 ] with-small-register ; inline
355 : %alien-unsigned-getter ( dst src size -- )
356 [ MOVZX ] %alien-integer-getter ; inline
358 M: x86 %alien-unsigned-1 8 %alien-unsigned-getter ;
359 M: x86 %alien-unsigned-2 16 %alien-unsigned-getter ;
360 M: x86 %alien-unsigned-4 32 [ 2drop ] %alien-integer-getter ;
362 : %alien-signed-getter ( dst src size -- )
363 [ MOVSX ] %alien-integer-getter ; inline
365 M: x86 %alien-signed-1 8 %alien-signed-getter ;
366 M: x86 %alien-signed-2 16 %alien-signed-getter ;
367 M: x86 %alien-signed-4 32 %alien-signed-getter ;
369 M: x86 %alien-cell [] MOV ;
370 M: x86 %alien-float dupd [] MOVSS dup CVTSS2SD ;
371 M: x86 %alien-double [] MOVSD ;
373 :: %alien-integer-setter ( ptr value size -- )
374 value { ptr } size [| new-value |
376 ptr [] new-value size n-bit-version-of MOV
377 ] with-small-register ; inline
379 M: x86 %set-alien-integer-1 8 %alien-integer-setter ;
380 M: x86 %set-alien-integer-2 16 %alien-integer-setter ;
381 M: x86 %set-alien-integer-4 32 %alien-integer-setter ;
382 M: x86 %set-alien-cell [ [] ] dip MOV ;
383 M: x86 %set-alien-float dup dup CVTSD2SS [ [] ] dip MOVSS ;
384 M: x86 %set-alien-double [ [] ] dip MOVSD ;
386 : shift-count? ( reg -- ? ) { ECX RCX } memq? ;
388 :: emit-shift ( dst src1 src2 quot -- )
397 ECX native-version-of [
399 drop dst CL quot call
404 M: x86 %shl [ SHL ] emit-shift ;
405 M: x86 %shr [ SHR ] emit-shift ;
406 M: x86 %sar [ SAR ] emit-shift ;
408 : load-zone-ptr ( reg -- )
409 #! Load pointer to start of zone array
410 0 MOV "nursery" f rc-absolute-cell rel-dlsym ;
412 : load-allot-ptr ( nursery-ptr allot-ptr -- )
413 [ drop load-zone-ptr ] [ swap cell [+] MOV ] 2bi ;
415 : inc-allot-ptr ( nursery-ptr n -- )
416 [ cell [+] ] dip 8 align ADD ;
418 : store-header ( temp class -- )
419 [ [] ] [ type-number tag-fixnum ] bi* MOV ;
421 : store-tagged ( dst tag -- )
424 M:: x86 %allot ( dst size class nursery-ptr -- )
425 nursery-ptr dst load-allot-ptr
426 dst class store-header
427 dst class store-tagged
428 nursery-ptr size inc-allot-ptr ;
430 M:: x86 %write-barrier ( src card# table -- )
431 #! Mark the card pointed to by vreg.
435 table "cards_offset" f %alien-global
437 table card# [+] card-mark <byte> MOV
440 card# deck-bits card-bits - SHR
441 table "decks_offset" f %alien-global
443 table card# [+] card-mark <byte> MOV ;
445 M:: x86 %check-nursery ( label temp1 temp2 -- )
447 temp2 temp1 cell [+] MOV
449 temp1 temp1 3 cells [+] MOV
453 M: x86 %save-gc-root ( gc-root register -- ) [ gc-root@ ] dip MOV ;
455 M: x86 %load-gc-root ( gc-root register -- ) swap gc-root@ MOV ;
457 M:: x86 %call-gc ( gc-root-count -- )
458 ! Pass pointer to start of GC roots as first parameter
459 param-reg-1 gc-root-base param@ LEA
460 ! Pass number of roots as second parameter
461 param-reg-2 gc-root-count MOV
463 %prepare-alien-invoke
464 "inline_gc" f %alien-invoke ;
467 [ 0 MOV ] 2dip rc-absolute-cell rel-dlsym ;
469 M: x86 %epilogue ( n -- ) cell - incr-stack-reg ;
471 :: %boolean ( dst temp word -- )
472 dst \ f tag-number MOV
473 temp 0 MOV \ t rc-absolute-cell rel-immediate
474 dst temp word execute ; inline
476 M: x86 %compare ( dst temp cc src1 src2 -- )
478 { cc< [ \ CMOVL %boolean ] }
479 { cc<= [ \ CMOVLE %boolean ] }
480 { cc> [ \ CMOVG %boolean ] }
481 { cc>= [ \ CMOVGE %boolean ] }
482 { cc= [ \ CMOVE %boolean ] }
483 { cc/= [ \ CMOVNE %boolean ] }
486 M: x86 %compare-imm ( dst temp cc src1 src2 -- )
489 M: x86 %compare-float ( dst temp cc src1 src2 -- )
491 { cc< [ \ CMOVB %boolean ] }
492 { cc<= [ \ CMOVBE %boolean ] }
493 { cc> [ \ CMOVA %boolean ] }
494 { cc>= [ \ CMOVAE %boolean ] }
495 { cc= [ \ CMOVE %boolean ] }
496 { cc/= [ \ CMOVNE %boolean ] }
499 M: x86 %compare-branch ( label cc src1 src2 -- )
509 M: x86 %compare-imm-branch ( label src1 src2 cc -- )
512 M: x86 %compare-float-branch ( label cc src1 src2 -- )
522 M: x86 %spill ( src n rep -- ) [ spill@ swap ] dip copy-register ;
523 M: x86 %reload ( dst n rep -- ) [ spill@ ] dip copy-register ;
525 M: x86 %loop-entry 16 code-alignment [ NOP ] times ;
527 M: x86 %prepare-alien-invoke
528 #! Save Factor stack pointers in case the C code calls a
529 #! callback which does a GC, which must reliably trace
531 temp-reg "stack_chain" f %alien-global
532 temp-reg temp-reg [] MOV
533 temp-reg [] stack-reg MOV
535 temp-reg 2 cells [+] ds-reg MOV
536 temp-reg 3 cells [+] rs-reg MOV ;
538 M: x86 value-struct? drop t ;
540 M: x86 small-enough? ( n -- ? )
541 HEX: -80000000 HEX: 7fffffff between? ;
543 : next-stack@ ( n -- operand )
544 #! nth parameter from the next stack frame. Used to box
545 #! input values to callbacks; the callback has its own
546 #! stack frame set up, and we want to read the frame
547 #! set up by the caller.
548 stack-frame get total-size>> + stack@ ;