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 ;
70 0 CALL rc-relative rt-dlsym jit-rel
71 ! restore ds, rs registers
73 ] jit-primitive jit-define
75 : jit-jump-quot ( -- )
76 EAX quot-entry-point-offset [+] JMP ;
78 : jit-call-quot ( -- )
79 EAX quot-entry-point-offset [+] CALL ;
84 "begin_callback" jit-call
86 ! load quotation - EBP is ctx-reg so it will get clobbered
94 ! save C callstack pointer
95 ctx-reg context-callstack-save-offset [+] ESP MOV
97 ! load Factor callstack pointer
98 ESP ctx-reg context-callstack-bottom-offset [+] MOV
106 ! load C callstack pointer
107 ESP ctx-reg context-callstack-save-offset [+] MOV
110 "end_callback" jit-call
111 ] \ c-to-factor define-sub-primitive
115 ds-reg bootstrap-cell SUB
119 \ (call) define-combinator-primitive
122 ! Clear x87 stack, but preserve rounding mode and exception flags
130 EAX ESP stack-frame-size [+] MOV
131 EDX ESP stack-frame-size 4 + [+] MOV
133 ! Unwind stack frames
136 ! Load ds and rs registers
142 ] \ unwind-native-frames define-sub-primitive
145 ! Load callstack object
147 ds-reg bootstrap-cell SUB
148 ! Get ctx->callstack_bottom
151 EAX ctx-reg context-callstack-bottom-offset [+] MOV
152 ! Get top of callstack object -- 'src' for memcpy
153 EBP EBX callstack-top-offset [+] LEA
154 ! Get callstack length, in bytes --- 'len' for memcpy
155 EDX EBX callstack-length-offset [+] MOV
157 ! Compute new stack pointer -- 'dst' for memcpy
159 ! Install new stack pointer
165 "factor_memcpy" jit-call
167 ! Return with new callstack
169 ] \ set-callstack define-sub-primitive
180 "lazy_jit_compile" jit-call
184 \ lazy-jit-compile define-combinator-primitive
186 ! Inline cache miss entry points
187 : jit-load-return-address ( -- )
188 EBX ESP stack-frame-size bootstrap-cell - [+] MOV ;
190 ! These are always in tail position with an existing stack
191 ! frame, and the stack. The frame setup takes this into account.
192 : jit-inline-cache-miss ( -- )
197 "inline_cache_miss" jit-call
198 jit-restore-context ;
200 [ jit-load-return-address jit-inline-cache-miss ]
203 \ inline-cache-miss define-combinator-primitive
205 [ jit-inline-cache-miss ]
208 \ inline-cache-miss-tail define-combinator-primitive
210 ! Overflowing fixnum arithmetic
211 : jit-overflow ( insn func -- )
218 [ [ EBX EDX ] dip call( dst src -- ) ] dip
229 [ [ ADD ] "overflow_fixnum_add" jit-overflow ] \ fixnum+ define-sub-primitive
231 [ [ SUB ] "overflow_fixnum_subtract" jit-overflow ] \ fixnum- define-sub-primitive
249 "overflow_fixnum_multiply" jit-call
252 ] \ fixnum* define-sub-primitive
255 : jit-switch-context ( reg -- )
256 ! Save ds, rs registers
260 ! Make the new context the current one
262 vm-reg vm-context-offset [+] ctx-reg MOV
264 ! Load new stack pointer
265 ESP ctx-reg context-callstack-top-offset [+] MOV
267 ! Load new ds, rs registers
268 jit-restore-context ;
270 : jit-set-context ( -- )
271 ! Load context and parameter from datastack
273 EAX EAX alien-offset [+] MOV
274 EBX ds-reg -4 [+] MOV
277 ! Make the new context active
278 EAX jit-switch-context
280 ! Twiddle stack for return
283 ! Store parameter to datastack
287 [ jit-set-context ] \ (set-context) define-sub-primitive
289 : jit-start-context ( -- )
290 ! Create the new context in return-reg
293 "new_context" jit-call
295 ! Save pointer to quotation and parameter
299 ! Make the new context active
300 EAX jit-switch-context
307 ! Jump to initial quotation
311 [ jit-start-context ] \ (start-context) define-sub-primitive
313 : jit-delete-current-context ( -- )
317 ESP 4 [+] ctx-reg MOV
318 "delete_context" jit-call ;
321 jit-delete-current-context
323 ] \ (set-context-and-delete) define-sub-primitive
326 jit-delete-current-context
328 ] \ (start-context-and-delete) define-sub-primitive
330 << "vocab:cpu/x86/bootstrap.factor" parse-file suffix! >>