1 ! Copyright (C) 2007, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: bootstrap.image.private kernel kernel.private namespaces
4 system cpu.x86.assembler cpu.x86.assembler.operands layouts
5 vocabs parser compiler.constants sequences math math.private
6 generic.single.private threads.private ;
11 : stack-frame-size ( -- n ) 8 bootstrap-cells ;
12 : shift-arg ( -- reg ) ECX ;
13 : div-arg ( -- reg ) EAX ;
14 : mod-arg ( -- reg ) EDX ;
15 : temp0 ( -- reg ) EAX ;
16 : temp1 ( -- reg ) ECX ;
17 : temp2 ( -- reg ) EBX ;
18 : temp3 ( -- reg ) EDX ;
19 : pic-tail-reg ( -- reg ) EDX ;
20 : stack-reg ( -- reg ) ESP ;
21 : frame-reg ( -- reg ) EBP ;
22 : vm-reg ( -- reg ) EBX ;
23 : ctx-reg ( -- reg ) EBP ;
24 : nv-regs ( -- seq ) { ESI EDI EBX } ;
25 : nv-reg ( -- reg ) ESI ;
26 : ds-reg ( -- reg ) ESI ;
27 : rs-reg ( -- reg ) EDI ;
28 : fixnum>slot@ ( -- ) temp0 2 SAR ;
29 : rex-length ( -- n ) 0 ;
31 : jit-call ( name -- )
32 0 CALL rc-relative jit-dlsym ;
35 ! save stack frame size
38 0 PUSH rc-absolute-cell rt-this jit-rel
40 ESP stack-frame-size 3 bootstrap-cells - SUB
41 ] jit-prolog jit-define
44 pic-tail-reg 0 MOV rc-absolute-cell rt-here jit-rel
45 0 JMP rc-relative rt-entry-point-pic-tail jit-rel
46 ] jit-word-jump jit-define
49 vm-reg 0 MOV 0 rc-absolute-cell jit-vm ;
51 : jit-load-context ( -- )
52 ! VM pointer must be in vm-reg already
53 ctx-reg vm-reg vm-context-offset [+] MOV ;
55 : jit-save-context ( -- )
58 ctx-reg context-callstack-top-offset [+] ECX MOV
59 ctx-reg context-datastack-offset [+] ds-reg MOV
60 ctx-reg context-retainstack-offset [+] rs-reg MOV ;
62 : jit-restore-context ( -- )
63 ds-reg ctx-reg context-datastack-offset [+] MOV
64 rs-reg ctx-reg context-retainstack-offset [+] MOV ;
66 : jit-scrub-return ( n -- )
70 ! ctx-reg is preserved across the call because it is non-volatile
76 0 CALL rc-relative rt-dlsym jit-rel
78 ] jit-primitive jit-define
80 : jit-jump-quot ( -- )
81 EAX quot-entry-point-offset [+] JMP ;
83 : jit-call-quot ( -- )
84 EAX quot-entry-point-offset [+] CALL ;
91 "begin_callback" jit-call
103 "end_callback" jit-call
104 ] \ c-to-factor define-sub-primitive
108 ds-reg bootstrap-cell SUB
112 \ (call) define-combinator-primitive
115 ! Load ds and rs registers
120 ! Windows-specific setup
121 ctx-reg jit-update-seh
123 ! Clear x87 stack, but preserve rounding mode and exception flags
131 EAX ESP stack-frame-size [+] MOV
132 EDX ESP stack-frame-size 4 + [+] MOV
134 ! Unwind stack frames
139 ] \ unwind-native-frames define-sub-primitive
142 ! Load callstack object
144 ds-reg bootstrap-cell SUB
145 ! Get ctx->callstack_bottom
148 temp0 ctx-reg context-callstack-bottom-offset [+] MOV
149 ! Get top of callstack object -- 'src' for memcpy
150 temp1 temp3 callstack-top-offset [+] LEA
151 ! Get callstack length, in bytes --- 'len' for memcpy
152 temp2 temp3 callstack-length-offset [+] MOV
153 temp2 tag-bits get SHR
154 ! Compute new stack pointer -- 'dst' for memcpy
156 ! Install new stack pointer
162 "factor_memcpy" jit-call
164 ! Return with new callstack
166 ] \ set-callstack define-sub-primitive
177 "lazy_jit_compile" jit-call
181 \ lazy-jit-compile define-combinator-primitive
184 temp1 HEX: ffffffff CMP rc-absolute-cell rt-literal jit-rel
185 ] pic-check-tuple jit-define
187 ! Inline cache miss entry points
188 : jit-load-return-address ( -- )
189 pic-tail-reg ESP stack-frame-size bootstrap-cell - [+] MOV ;
191 ! These are always in tail position with an existing stack
192 ! frame, and the stack. The frame setup takes this into account.
193 : jit-inline-cache-miss ( -- )
197 ESP [] pic-tail-reg MOV
198 "inline_cache_miss" jit-call
199 jit-restore-context ;
201 [ jit-load-return-address jit-inline-cache-miss ]
204 \ inline-cache-miss define-combinator-primitive
206 [ jit-inline-cache-miss ]
209 \ inline-cache-miss-tail define-combinator-primitive
211 ! Overflowing fixnum arithmetic
212 : jit-overflow ( insn func -- )
219 [ [ EBX EDX ] dip call( dst src -- ) ] dip
231 [ [ ADD ] "overflow_fixnum_add" jit-overflow ] \ fixnum+ define-sub-primitive
233 [ [ SUB ] "overflow_fixnum_subtract" jit-overflow ] \ fixnum- define-sub-primitive
252 "overflow_fixnum_multiply" jit-call
255 ] \ fixnum* define-sub-primitive
258 : jit-switch-context ( reg -- )
261 ! Save ds, rs registers
265 ! Make the new context the current one
267 vm-reg vm-context-offset [+] ctx-reg MOV
269 ! Load new stack pointer
270 ESP ctx-reg context-callstack-top-offset [+] MOV
272 ! Windows-specific setup
273 ctx-reg jit-update-tib
275 ! Load new ds, rs registers
276 jit-restore-context ;
278 : jit-set-context ( -- )
279 ! Load context and parameter from datastack
281 EAX EAX alien-offset [+] MOV
282 EDX ds-reg -4 [+] MOV
285 ! Make the new context active
286 EAX jit-switch-context
288 ! Windows-specific setup
289 ctx-reg jit-update-seh
291 ! Twiddle stack for return
294 ! Store parameter to datastack
298 [ jit-set-context ] \ (set-context) define-sub-primitive
300 : jit-start-context ( -- )
301 ! Create the new context in return-reg
304 "new_context" jit-call
306 ! Save pointer to quotation and parameter
310 ! Make the new context active
311 EAX jit-switch-context
318 ! Windows-specific setup
321 ! Push a fake return address
324 ! Jump to initial quotation
328 [ jit-start-context ] \ (start-context) define-sub-primitive
330 : jit-delete-current-context ( -- )
334 ESP 4 [+] ctx-reg MOV
335 "delete_context" jit-call ;
338 jit-delete-current-context
340 ] \ (set-context-and-delete) define-sub-primitive
343 jit-delete-current-context
345 ] \ (start-context-and-delete) define-sub-primitive