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 layouts vocabs parser compiler.constants math
5 math.private cpu.x86.assembler cpu.x86.assembler.operands
6 sequences generic.single.private threads.private ;
11 : shift-arg ( -- reg ) RCX ;
12 : div-arg ( -- reg ) RAX ;
13 : mod-arg ( -- reg ) RDX ;
14 : temp0 ( -- reg ) RAX ;
15 : temp1 ( -- reg ) RCX ;
16 : temp2 ( -- reg ) RDX ;
17 : temp3 ( -- reg ) RBX ;
18 : pic-tail-reg ( -- reg ) RBX ;
19 : return-reg ( -- reg ) RAX ;
20 : nv-reg ( -- reg ) RBX ;
21 : stack-reg ( -- reg ) RSP ;
22 : frame-reg ( -- reg ) RBP ;
23 : ctx-reg ( -- reg ) R12 ;
24 : vm-reg ( -- reg ) R13 ;
25 : ds-reg ( -- reg ) R14 ;
26 : rs-reg ( -- reg ) R15 ;
27 : fixnum>slot@ ( -- ) temp0 1 SAR ;
28 : rex-length ( -- n ) 1 ;
30 : jit-call ( name -- )
31 RAX 0 MOV rc-absolute-cell jit-dlsym
36 RAX 0 MOV rc-absolute-cell rt-this jit-rel
37 ! save stack frame size
42 RSP stack-frame-size 3 bootstrap-cells - SUB
43 ] jit-prolog jit-define
46 pic-tail-reg 5 [RIP+] LEA
47 0 JMP rc-relative rt-entry-point-pic-tail jit-rel
48 ] jit-word-jump jit-define
50 : jit-load-context ( -- )
51 ctx-reg vm-reg vm-context-offset [+] MOV ;
53 : jit-save-context ( -- )
56 ctx-reg context-callstack-top-offset [+] R11 MOV
57 ctx-reg context-datastack-offset [+] ds-reg MOV
58 ctx-reg context-retainstack-offset [+] rs-reg MOV ;
60 : jit-restore-context ( -- )
61 ds-reg ctx-reg context-datastack-offset [+] MOV
62 rs-reg ctx-reg context-retainstack-offset [+] MOV ;
64 : jit-scrub-return ( n -- )
68 ! ctx-reg is preserved across the call because it is non-volatile
73 RAX 0 MOV rc-absolute-cell rt-dlsym jit-rel
76 ] jit-primitive jit-define
78 : jit-jump-quot ( -- ) arg1 quot-entry-point-offset [+] JMP ;
80 : jit-call-quot ( -- ) arg1 quot-entry-point-offset [+] CALL ;
85 "begin_callback" jit-call
97 "end_callback" jit-call
98 ] \ c-to-factor define-sub-primitive
102 ds-reg bootstrap-cell SUB
106 \ (call) define-combinator-primitive
109 ! Clear x87 stack, but preserve rounding mode and exception flags
115 ! Unwind stack frames
119 ! Load VM pointer into vm-reg, since we're entering from
121 vm-reg 0 MOV 0 rc-absolute-cell jit-vm
123 ! Load ds and rs registers
129 ] \ unwind-native-frames define-sub-primitive
132 ! Load callstack object
134 ds-reg bootstrap-cell SUB
135 ! Get ctx->callstack_bottom
137 arg1 ctx-reg context-callstack-bottom-offset [+] MOV
138 ! Get top of callstack object -- 'src' for memcpy
139 arg2 arg4 callstack-top-offset [+] LEA
140 ! Get callstack length, in bytes --- 'len' for memcpy
141 arg3 arg4 callstack-length-offset [+] MOV
142 arg3 tag-bits get SHR
143 ! Compute new stack pointer -- 'dst' for memcpy
145 ! Install new stack pointer
147 ! Call memcpy; arguments are now in the correct registers
148 ! Create register shadow area for Win64
150 "factor_memcpy" jit-call
151 ! Tear down register shadow area
153 ! Return with new callstack
155 ] \ set-callstack define-sub-primitive
160 "lazy_jit_compile" jit-call
163 [ return-reg quot-entry-point-offset [+] CALL ]
165 \ lazy-jit-compile define-combinator-primitive
168 temp2 HEX: ffffffff MOV rc-absolute-cell rt-literal jit-rel
170 ] pic-check-tuple jit-define
172 ! Inline cache miss entry points
173 : jit-load-return-address ( -- )
174 RBX RSP stack-frame-size bootstrap-cell - [+] MOV ;
176 ! These are always in tail position with an existing stack
177 ! frame, and the stack. The frame setup takes this into account.
178 : jit-inline-cache-miss ( -- )
182 "inline_cache_miss" jit-call
184 jit-restore-context ;
186 [ jit-load-return-address jit-inline-cache-miss ]
189 \ inline-cache-miss define-combinator-primitive
191 [ jit-inline-cache-miss ]
194 \ inline-cache-miss-tail define-combinator-primitive
196 ! Overflowing fixnum arithmetic
197 : jit-overflow ( insn func -- )
201 arg2 ds-reg 8 [+] MOV
203 [ [ arg3 arg2 ] dip call ] dip
206 [ arg3 vm-reg MOV jit-call ]
207 jit-conditional ; inline
209 [ [ ADD ] "overflow_fixnum_add" jit-overflow ] \ fixnum+ define-sub-primitive
211 [ [ SUB ] "overflow_fixnum_subtract" jit-overflow ] \ fixnum- define-sub-primitive
225 arg1 tag-bits get SAR
228 "overflow_fixnum_multiply" jit-call
231 ] \ fixnum* define-sub-primitive
234 : jit-switch-context ( reg -- )
237 ! Save ds, rs registers
240 ! Make the new context the current one
242 vm-reg vm-context-offset [+] ctx-reg MOV
244 ! Load new stack pointer
245 RSP ctx-reg context-callstack-top-offset [+] MOV
247 ! Load new ds, rs registers
250 ctx-reg jit-update-tib ;
252 : jit-pop-context-and-param ( -- )
254 arg1 arg1 alien-offset [+] MOV
255 arg2 ds-reg -8 [+] MOV
258 : jit-push-param ( -- )
262 : jit-set-context ( -- )
263 jit-pop-context-and-param
264 arg1 jit-switch-context
268 [ jit-set-context ] \ (set-context) define-sub-primitive
270 : jit-pop-quot-and-param ( -- )
272 arg2 ds-reg -8 [+] MOV
275 : jit-start-context ( -- )
276 ! Create the new context in return-reg
278 "new_context" jit-call
280 jit-pop-quot-and-param
282 return-reg jit-switch-context
288 [ jit-start-context ] \ (start-context) define-sub-primitive
290 : jit-delete-current-context ( -- )
294 "delete_context" jit-call ;
297 jit-delete-current-context
299 ] \ (set-context-and-delete) define-sub-primitive
302 jit-delete-current-context
304 ] \ (start-context-and-delete) define-sub-primitive