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 ;
206 M: x86 %sqrt SQRTSD ;
208 M: x86 %integer>float CVTSI2SD ;
209 M: x86 %float>integer CVTTSD2SI ;
211 GENERIC: copy-register* ( dst src rep -- )
213 M: int-rep copy-register* drop MOV ;
214 M: tagged-rep copy-register* drop MOV ;
215 M: single-float-rep copy-register* drop MOVSS ;
216 M: double-float-rep copy-register* drop MOVSD ;
218 : copy-register ( dst src rep -- )
219 2over eq? [ 3drop ] [ copy-register* ] if ;
221 M: x86 %copy ( dst src rep -- ) copy-register ;
223 M: x86 %unbox-float ( dst src -- )
224 float-offset [+] MOVSD ;
226 M:: x86 %unbox-any-c-ptr ( dst src temp -- )
228 { "is-byte-array" "end" "start" } [ define-label ] each
231 ! We come back here with displaced aliens
232 "start" resolve-label
234 temp \ f tag-number CMP
236 ! Is the object an alien?
237 temp header-offset [+] alien type-number tag-fixnum CMP
238 "is-byte-array" get JNE
239 ! If so, load the offset and add it to the address
240 dst temp alien-offset [+] ADD
241 ! Now recurse on the underlying alien
242 temp temp underlying-alien-offset [+] MOV
244 "is-byte-array" resolve-label
245 ! Add byte array address to address being computed
247 ! Add an offset to start of byte array's data
248 dst byte-array-offset ADD
252 M:: x86 %box-float ( dst src temp -- )
253 dst 16 float temp %allot
254 dst float-offset [+] src MOVSD ;
256 : alien@ ( reg n -- op ) cells alien tag-number - [+] ;
258 :: %allot-alien ( dst base displacement temp -- )
259 dst 4 cells alien temp %allot
260 dst 1 alien@ base MOV ! alien
261 dst 2 alien@ \ f tag-number MOV ! expired
262 dst 3 alien@ displacement MOV ! displacement
265 M:: x86 %box-alien ( dst src temp -- )
268 dst \ f tag-number MOV
271 dst \ f tag-number src temp %allot-alien
275 M:: x86 %box-displaced-alien ( dst displacement base temp -- )
279 ! If displacement is zero, return the base
283 ! If base is already a displaced alien, unpack it
284 base \ f tag-number CMP
286 base header-offset [+] alien type-number tag-fixnum CMP
288 ! displacement += base.displacement
289 displacement base 3 alien@ ADD
291 base base 1 alien@ MOV
293 dst base displacement temp %allot-alien
297 ! The 'small-reg' mess is pretty crappy, but its only used on x86-32.
298 ! On x86-64, all registers have 8-bit versions. However, a similar
299 ! problem arises for shifts, where the shift count must be in CL, and
300 ! so one day I will fix this properly by adding precoloring to the
301 ! register allocator.
303 HOOK: has-small-reg? cpu ( reg size -- ? )
305 CONSTANT: have-byte-regs { EAX ECX EDX EBX }
307 M: x86.32 has-small-reg?
309 { 8 [ have-byte-regs memq? ] }
314 M: x86.64 has-small-reg? 2drop t ;
316 : small-reg-that-isn't ( exclude -- reg' )
317 [ have-byte-regs ] dip
318 [ native-version-of ] map
319 '[ _ memq? not ] find nip ;
321 : with-save/restore ( reg quot -- )
322 [ drop PUSH ] [ call ] [ drop POP ] 2tri ; inline
324 :: with-small-register ( dst exclude size quot: ( new-dst -- ) -- )
325 ! If the destination register overlaps a small register with
326 ! 'size' bits, we call the quot with that. Otherwise, we find a
327 ! small register that is not in exclude, and call quot, saving and
328 ! restoring the small register.
329 dst size has-small-reg? [ dst quot call ] [
330 exclude small-reg-that-isn't
331 [ quot call ] with-save/restore
334 : ?MOV ( dst src -- )
335 2dup = [ 2drop ] [ MOV ] if ; inline
337 M:: x86 %string-nth ( dst src index temp -- )
338 ! We request a small-reg of size 8 since those of size 16 are
341 dst { src index temp } 8 [| new-dst |
342 ! Load the least significant 7 bits into new-dst.
343 ! 8th bit indicates whether we have to load from
344 ! the aux vector or not.
345 temp src index [+] LEA
346 new-dst 8-bit-version-of temp string-offset [+] MOV
347 new-dst new-dst 8-bit-version-of MOVZX
348 ! Do we have to look at the aux vector?
351 ! Yes, this is a non-ASCII character. Load aux vector
352 temp src string-aux-offset [+] MOV
358 new-dst 16-bit-version-of new-dst byte-array-offset [+] MOV
359 new-dst new-dst 16-bit-version-of MOVZX
365 ] with-small-register ;
367 M:: x86 %set-string-nth-fast ( ch str index temp -- )
368 ch { index str temp } 8 [| new-ch |
370 temp str index [+] LEA
371 temp string-offset [+] new-ch 8-bit-version-of MOV
372 ] with-small-register ;
374 :: %alien-integer-getter ( dst src size quot -- )
375 dst { src } size [| new-dst |
376 new-dst dup size n-bit-version-of dup src [] MOV
379 ] with-small-register ; inline
381 : %alien-unsigned-getter ( dst src size -- )
382 [ MOVZX ] %alien-integer-getter ; inline
384 M: x86 %alien-unsigned-1 8 %alien-unsigned-getter ;
385 M: x86 %alien-unsigned-2 16 %alien-unsigned-getter ;
386 M: x86 %alien-unsigned-4 32 [ 2drop ] %alien-integer-getter ;
388 : %alien-signed-getter ( dst src size -- )
389 [ MOVSX ] %alien-integer-getter ; inline
391 M: x86 %alien-signed-1 8 %alien-signed-getter ;
392 M: x86 %alien-signed-2 16 %alien-signed-getter ;
393 M: x86 %alien-signed-4 32 %alien-signed-getter ;
395 M: x86 %alien-cell [] MOV ;
396 M: x86 %alien-float dupd [] MOVSS dup CVTSS2SD ;
397 M: x86 %alien-double [] MOVSD ;
399 :: %alien-integer-setter ( ptr value size -- )
400 value { ptr } size [| new-value |
402 ptr [] new-value size n-bit-version-of MOV
403 ] with-small-register ; inline
405 M: x86 %set-alien-integer-1 8 %alien-integer-setter ;
406 M: x86 %set-alien-integer-2 16 %alien-integer-setter ;
407 M: x86 %set-alien-integer-4 32 %alien-integer-setter ;
408 M: x86 %set-alien-cell [ [] ] dip MOV ;
409 M: x86 %set-alien-float dup dup CVTSD2SS [ [] ] dip MOVSS ;
410 M: x86 %set-alien-double [ [] ] dip MOVSD ;
412 : shift-count? ( reg -- ? ) { ECX RCX } memq? ;
414 :: emit-shift ( dst src1 src2 quot -- )
423 ECX native-version-of [
425 drop dst CL quot call
430 M: x86 %shl [ SHL ] emit-shift ;
431 M: x86 %shr [ SHR ] emit-shift ;
432 M: x86 %sar [ SAR ] emit-shift ;
434 : load-zone-ptr ( reg -- )
435 #! Load pointer to start of zone array
436 0 MOV "nursery" f rc-absolute-cell rel-dlsym ;
438 : load-allot-ptr ( nursery-ptr allot-ptr -- )
439 [ drop load-zone-ptr ] [ swap cell [+] MOV ] 2bi ;
441 : inc-allot-ptr ( nursery-ptr n -- )
442 [ cell [+] ] dip 8 align ADD ;
444 : store-header ( temp class -- )
445 [ [] ] [ type-number tag-fixnum ] bi* MOV ;
447 : store-tagged ( dst tag -- )
450 M:: x86 %allot ( dst size class nursery-ptr -- )
451 nursery-ptr dst load-allot-ptr
452 dst class store-header
453 dst class store-tagged
454 nursery-ptr size inc-allot-ptr ;
456 M:: x86 %write-barrier ( src card# table -- )
457 #! Mark the card pointed to by vreg.
461 table "cards_offset" f %alien-global
463 table card# [+] card-mark <byte> MOV
466 card# deck-bits card-bits - SHR
467 table "decks_offset" f %alien-global
469 table card# [+] card-mark <byte> MOV ;
471 M:: x86 %check-nursery ( label temp1 temp2 -- )
473 temp2 temp1 cell [+] MOV
475 temp1 temp1 3 cells [+] MOV
479 M: x86 %save-gc-root ( gc-root register -- ) [ gc-root@ ] dip MOV ;
481 M: x86 %load-gc-root ( gc-root register -- ) swap gc-root@ MOV ;
483 M:: x86 %call-gc ( gc-root-count -- )
484 ! Pass pointer to start of GC roots as first parameter
485 param-reg-1 gc-root-base param@ LEA
486 ! Pass number of roots as second parameter
487 param-reg-2 gc-root-count MOV
489 %prepare-alien-invoke
490 "inline_gc" f %alien-invoke ;
493 [ 0 MOV ] 2dip rc-absolute-cell rel-dlsym ;
495 M: x86 %epilogue ( n -- ) cell - incr-stack-reg ;
497 :: %boolean ( dst temp word -- )
498 dst \ f tag-number MOV
499 temp 0 MOV \ t rc-absolute-cell rel-immediate
500 dst temp word execute ; inline
502 M: x86 %compare ( dst temp cc src1 src2 -- )
504 { cc< [ \ CMOVL %boolean ] }
505 { cc<= [ \ CMOVLE %boolean ] }
506 { cc> [ \ CMOVG %boolean ] }
507 { cc>= [ \ CMOVGE %boolean ] }
508 { cc= [ \ CMOVE %boolean ] }
509 { cc/= [ \ CMOVNE %boolean ] }
512 M: x86 %compare-imm ( dst temp cc src1 src2 -- )
515 M: x86 %compare-float ( dst temp cc src1 src2 -- )
517 { cc< [ \ CMOVB %boolean ] }
518 { cc<= [ \ CMOVBE %boolean ] }
519 { cc> [ \ CMOVA %boolean ] }
520 { cc>= [ \ CMOVAE %boolean ] }
521 { cc= [ \ CMOVE %boolean ] }
522 { cc/= [ \ CMOVNE %boolean ] }
525 M: x86 %compare-branch ( label cc src1 src2 -- )
535 M: x86 %compare-imm-branch ( label src1 src2 cc -- )
538 M: x86 %compare-float-branch ( label cc src1 src2 -- )
548 M: x86 %spill ( src n rep -- ) [ spill@ swap ] dip copy-register ;
549 M: x86 %reload ( dst n rep -- ) [ spill@ ] dip copy-register ;
551 M: x86 %loop-entry 16 code-alignment [ NOP ] times ;
553 M: x86 %prepare-alien-invoke
554 #! Save Factor stack pointers in case the C code calls a
555 #! callback which does a GC, which must reliably trace
557 temp-reg "stack_chain" f %alien-global
558 temp-reg temp-reg [] MOV
559 temp-reg [] stack-reg MOV
561 temp-reg 2 cells [+] ds-reg MOV
562 temp-reg 3 cells [+] rs-reg MOV ;
564 M: x86 value-struct? drop t ;
566 M: x86 small-enough? ( n -- ? )
567 HEX: -80000000 HEX: 7fffffff between? ;
569 : next-stack@ ( n -- operand )
570 #! nth parameter from the next stack frame. Used to box
571 #! input values to callbacks; the callback has its own
572 #! stack frame set up, and we want to read the frame
573 #! set up by the caller.
574 stack-frame get total-size>> + stack@ ;