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 ) EDX ;
17 : temp2 ( -- reg ) ECX ;
18 : temp3 ( -- reg ) EBX ;
19 : stack-reg ( -- reg ) ESP ;
20 : frame-reg ( -- reg ) EBP ;
21 : vm-reg ( -- reg ) ECX ;
22 : ctx-reg ( -- reg ) EBP ;
23 : nv-regs ( -- seq ) { ESI EDI EBX } ;
24 : nv-reg ( -- reg ) EBX ;
25 : ds-reg ( -- reg ) ESI ;
26 : rs-reg ( -- reg ) EDI ;
27 : fixnum>slot@ ( -- ) temp0 2 SAR ;
28 : rex-length ( -- n ) 0 ;
30 : jit-call ( name -- )
31 0 CALL rc-relative jit-dlsym ;
34 ! save stack frame size
37 0 PUSH rc-absolute-cell rt-this jit-rel
39 ESP stack-frame-size 3 bootstrap-cells - SUB
40 ] jit-prolog jit-define
43 temp3 0 MOV rc-absolute-cell rt-here jit-rel
44 0 JMP rc-relative rt-entry-point-pic-tail jit-rel
45 ] jit-word-jump jit-define
48 vm-reg 0 MOV 0 rc-absolute-cell jit-vm ;
50 : jit-load-context ( -- )
51 ! VM pointer must be in vm-reg already
52 ctx-reg vm-reg vm-context-offset [+] MOV ;
54 : jit-save-context ( -- )
57 ctx-reg context-callstack-top-offset [+] EDX MOV
58 ctx-reg context-datastack-offset [+] ds-reg MOV
59 ctx-reg context-retainstack-offset [+] rs-reg MOV ;
61 : jit-restore-context ( -- )
62 ds-reg ctx-reg context-datastack-offset [+] MOV
63 rs-reg ctx-reg context-retainstack-offset [+] MOV ;
66 ! ctx-reg is preserved across the call because it is non-volatile
72 0 CALL rc-relative rt-dlsym jit-rel
74 ] jit-primitive jit-define
76 : jit-jump-quot ( -- )
77 EAX quot-entry-point-offset [+] JMP ;
79 : jit-call-quot ( -- )
80 EAX quot-entry-point-offset [+] CALL ;
87 "begin_callback" jit-call
99 "end_callback" jit-call
100 ] \ c-to-factor define-sub-primitive
104 ds-reg bootstrap-cell SUB
108 \ (call) define-combinator-primitive
111 ! Clear x87 stack, but preserve rounding mode and exception flags
119 EAX ESP stack-frame-size [+] MOV
120 EDX ESP stack-frame-size 4 + [+] MOV
122 ! Unwind stack frames
125 ! Load ds and rs registers
131 ] \ unwind-native-frames define-sub-primitive
134 ! Load callstack object
136 ds-reg bootstrap-cell SUB
137 ! Get ctx->callstack_bottom
140 EAX ctx-reg context-callstack-bottom-offset [+] MOV
141 ! Get top of callstack object -- 'src' for memcpy
142 EBP EBX callstack-top-offset [+] LEA
143 ! Get callstack length, in bytes --- 'len' for memcpy
144 EDX EBX callstack-length-offset [+] MOV
146 ! Compute new stack pointer -- 'dst' for memcpy
148 ! Install new stack pointer
154 "factor_memcpy" jit-call
156 ! Return with new callstack
158 ] \ set-callstack define-sub-primitive
169 "lazy_jit_compile" jit-call
173 \ lazy-jit-compile define-combinator-primitive
175 ! Inline cache miss entry points
176 : jit-load-return-address ( -- )
177 EBX ESP stack-frame-size bootstrap-cell - [+] MOV ;
179 ! These are always in tail position with an existing stack
180 ! frame, and the stack. The frame setup takes this into account.
181 : jit-inline-cache-miss ( -- )
186 "inline_cache_miss" jit-call
187 jit-restore-context ;
189 [ jit-load-return-address jit-inline-cache-miss ]
192 \ inline-cache-miss define-combinator-primitive
194 [ jit-inline-cache-miss ]
197 \ inline-cache-miss-tail define-combinator-primitive
199 ! Overflowing fixnum arithmetic
200 : jit-overflow ( insn func -- )
207 [ [ EBX EDX ] dip call( dst src -- ) ] dip
218 [ [ ADD ] "overflow_fixnum_add" jit-overflow ] \ fixnum+ define-sub-primitive
220 [ [ SUB ] "overflow_fixnum_subtract" jit-overflow ] \ fixnum- define-sub-primitive
238 "overflow_fixnum_multiply" jit-call
241 ] \ fixnum* define-sub-primitive
244 : jit-switch-context ( reg -- )
245 ! Save ds, rs registers
249 ! Make the new context the current one
251 vm-reg vm-context-offset [+] ctx-reg MOV
253 ! Load new stack pointer
254 ESP ctx-reg context-callstack-top-offset [+] MOV
256 ! Load new ds, rs registers
257 jit-restore-context ;
259 : jit-set-context ( -- )
260 ! Load context and parameter from datastack
262 EAX EAX alien-offset [+] MOV
263 EBX ds-reg -4 [+] MOV
266 ! Make the new context active
267 EAX jit-switch-context
269 ! Twiddle stack for return
272 ! Store parameter to datastack
276 [ jit-set-context ] \ (set-context) define-sub-primitive
278 : jit-start-context ( -- )
279 ! Create the new context in return-reg
282 "new_context" jit-call
284 ! Save pointer to quotation and parameter
288 ! Make the new context active
289 EAX jit-switch-context
296 ! Jump to initial quotation
300 [ jit-start-context ] \ (start-context) define-sub-primitive
302 : jit-delete-current-context ( -- )
306 ESP 4 [+] ctx-reg MOV
307 "delete_context" jit-call ;
310 jit-delete-current-context
312 ] \ (set-context-and-delete) define-sub-primitive
315 jit-delete-current-context
317 ] \ (start-context-and-delete) define-sub-primitive
319 << "vocab:cpu/x86/bootstrap.factor" parse-file suffix! >>