1 ! Copyright (C) 2005, 2007 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: alien.c-types cpu.ppc.assembler cpu.architecture generic
4 kernel kernel.private math memory namespaces sequences words
5 assocs generator generator.registers generator.fixup system
6 layouts classes words.private alien combinators
7 compiler.constants math.order ;
8 IN: cpu.ppc.architecture
10 ! PowerPC register assignments
11 ! r3-r10, r16-r31: integer vregs
24 } case cells ; foldable
30 } case cells ; foldable
32 : param@ ( n -- x ) reserved-area-size + ; inline
34 : param-save-size 8 cells ; foldable
37 reserved-area-size param-save-size + + ; inline
39 : factor-area-size 2 cells ;
41 : next-save ( n -- i ) cell - ;
43 : xt-save ( n -- i ) 2 cells - ;
45 M: ppc stack-frame ( n -- i )
46 local@ factor-area-size + 4 cells align ;
48 M: temp-reg v>operand drop 11 ;
50 M: int-regs return-reg drop 3 ;
51 M: int-regs param-regs drop { 3 4 5 6 7 8 9 10 } ;
55 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
58 M: float-regs return-reg drop 1 ;
59 M: float-regs param-regs
61 { macosx { 1 2 3 4 5 6 7 8 9 10 11 12 13 } }
62 { linux { 1 2 3 4 5 6 7 8 } }
64 M: float-regs vregs drop { 0 1 2 3 4 5 6 7 8 9 10 11 12 13 } ;
66 GENERIC: loc>operand ( loc -- reg n )
68 M: ds-loc loc>operand ds-loc-n cells neg ds-reg swap ;
69 M: rs-loc loc>operand rs-loc-n cells neg rs-reg swap ;
71 M: immediate load-literal
72 [ v>operand ] bi@ LOAD ;
74 M: ppc load-indirect ( obj reg -- )
75 [ 0 swap LOAD32 rc-absolute-ppc-2/2 rel-literal ] keep
78 M: ppc %save-word-xt ( -- )
79 0 11 LOAD32 rc-absolute-ppc-2/2 rel-this ;
81 M: ppc %prologue ( n -- )
86 11 1 pick next-save STW
87 0 1 rot lr-save + STW ;
89 M: ppc %epilogue ( n -- )
90 #! At the end of each word that calls a subroutine, we store
91 #! the previous link register value in r0 by popping it off
92 #! the stack, set the link register to the contents of r0,
93 #! and jump to the link register.
94 0 1 pick lr-save + LWZ
98 : (%call) 11 MTLR BLRL ;
100 : (%jump) 11 MTCTR BCTR ;
102 : %load-dlsym ( symbol dll register -- )
103 0 swap LOAD32 rc-absolute-ppc-2/2 rel-dlsym ;
105 M: ppc %call ( label -- ) BL ;
107 M: ppc %jump-label ( label -- ) B ;
109 M: ppc %jump-f ( label -- )
110 0 "flag" operand f v>operand CMPI BEQ ;
112 M: ppc %dispatch ( -- )
115 0 11 LOAD32 rc-absolute-ppc-2/2 rel-here
116 "offset" operand "n" operand 1 SRAWI
117 11 11 "offset" operand ADD
121 { +input+ { { f "n" } } }
122 { +scratch+ { { f "offset" } } }
125 M: ppc %dispatch-label ( word -- )
126 0 , rc-absolute-cell rel-word ;
128 M: ppc %return ( -- ) %epilogue-later BLR ;
130 M: ppc %unwind drop %return ;
132 M: ppc %peek ( vreg loc -- )
133 >r v>operand r> loc>operand LWZ ;
136 >r v>operand r> loc>operand STW ;
138 M: ppc %unbox-float ( dst src -- )
139 [ v>operand ] bi@ float-offset LFD ;
141 M: ppc %inc-d ( n -- ) ds-reg dup rot cells ADDI ;
143 M: ppc %inc-r ( n -- ) rs-reg dup rot cells ADDI ;
145 M: int-regs %save-param-reg drop 1 rot local@ STW ;
147 M: int-regs %load-param-reg drop 1 rot local@ LWZ ;
149 GENERIC: STF ( src dst off reg-class -- )
151 M: single-float-regs STF drop STFS ;
153 M: double-float-regs STF drop STFD ;
155 M: float-regs %save-param-reg >r 1 rot local@ r> STF ;
157 GENERIC: LF ( dst src off reg-class -- )
159 M: single-float-regs LF drop LFS ;
161 M: double-float-regs LF drop LFD ;
163 M: float-regs %load-param-reg >r 1 rot local@ r> LF ;
165 M: stack-params %load-param-reg ( stack reg reg-class -- )
166 drop >r 0 1 rot local@ LWZ 0 1 r> param@ STW ;
168 M: stack-params %save-param-reg ( stack reg reg-class -- )
169 #! Funky. Read the parameter from the caller's stack frame.
170 #! This word is used in callbacks
172 0 1 rot param@ stack-frame* + LWZ
175 M: ppc %prepare-unbox ( -- )
176 ! First parameter is top of stack
178 ds-reg dup cell SUBI ;
180 M: ppc %unbox ( n reg-class func -- )
181 ! Value must be in r3
184 ! Store the return value on the C stack
185 over [ [ return-reg ] keep %save-param-reg ] [ 2drop ] if ;
187 M: ppc %unbox-long-long ( n func -- )
188 ! Value must be in r3:r4
191 ! Store the return value on the C stack
194 4 1 rot cell + local@ STW
197 M: ppc %unbox-large-struct ( n size -- )
198 ! Value must be in r3
199 ! Compute destination address
204 "to_value_struct" f %alien-invoke ;
206 M: ppc %box ( n reg-class func -- )
207 ! If the source is a stack location, load it into freg #0.
208 ! If the source is f, then we assume the value is already in
211 over [ 0 over param-reg swap %load-param-reg ] [ 2drop ] if
214 M: ppc %box-long-long ( n func -- )
217 4 1 rot cell + local@ LWZ
218 ] when* r> f %alien-invoke ;
220 : temp@ stack-frame* factor-area-size - swap - ;
222 : struct-return@ ( size n -- n ) [ local@ ] [ temp@ ] ?if ;
224 M: ppc %prepare-box-struct ( size -- )
225 #! Compute target address for value struct return
226 3 1 rot f struct-return@ ADDI
229 M: ppc %box-large-struct ( n size -- )
230 #! If n = f, then we're boxing a returned struct
231 [ swap struct-return@ ] keep
232 ! Compute destination address
237 "box_value_struct" f %alien-invoke ;
239 M: ppc %prepare-alien-invoke
240 #! Save Factor stack pointers in case the C code calls a
241 #! callback which does a GC, which must reliably trace
243 "stack_chain" f 11 %load-dlsym
249 M: ppc %alien-invoke ( symbol dll -- )
250 11 %load-dlsym (%call) ;
252 M: ppc %alien-callback ( quot -- )
253 3 load-indirect "c_to_factor" f %alien-invoke ;
255 M: ppc %prepare-alien-indirect ( -- )
256 "unbox_alien" f %alien-invoke
259 M: ppc %alien-indirect ( -- )
260 11 1 cell temp@ LWZ (%call) ;
262 M: ppc %callback-value ( ctype -- )
263 ! Save top of data stack
266 ! Restore data/call/retain stacks
267 "unnest_stacks" f %alien-invoke
268 ! Restore top of data stack
270 ! Unbox former top of data stack to return registers
273 M: ppc %cleanup ( alien-node -- ) drop ;
275 : %untag ( src dest -- ) 0 0 31 tag-bits get - RLWINM ;
277 : %tag-fixnum ( src dest -- ) tag-bits get SLWI ;
279 : %untag-fixnum ( dest src -- ) tag-bits get SRAWI ;
281 M: ppc value-structs?
282 #! On Linux/PPC, value structs are passed in the same way
283 #! as reference structs, we just have to make a copy first.
286 M: ppc fp-shadows-int? ( -- ? ) os macosx? ;
288 M: ppc small-enough? ( n -- ? ) -32768 32767 between? ;
290 M: ppc struct-small-enough? ( size -- ? ) drop f ;
292 M: ppc %box-small-struct
293 drop "No small structs" throw ;
295 M: ppc %unbox-small-struct
296 drop "No small structs" throw ;
299 M: ppc %unbox-byte-array ( dst src -- )
300 [ v>operand ] bi@ byte-array-offset ADDI ;
302 M: ppc %unbox-alien ( dst src -- )
303 [ v>operand ] bi@ alien-offset LWZ ;
305 M: ppc %unbox-f ( dst src -- )
306 drop 0 swap v>operand LI ;
308 M: ppc %unbox-any-c-ptr ( dst src -- )
309 { "is-byte-array" "end" "start" } [ define-label ] each
310 ! Address is computed in R12
312 ! Load object into R11
314 ! We come back here with displaced aliens
315 "start" resolve-label
317 0 11 f v>operand CMPI
320 ! Is the object an alien?
321 0 11 header-offset LWZ
322 0 0 alien type-number tag-fixnum CMPI
323 "is-byte-array" get BNE
324 ! If so, load the offset
325 0 11 alien-offset LWZ
326 ! Add it to address being computed
328 ! Now recurse on the underlying alien
329 11 11 underlying-alien-offset LWZ
331 "is-byte-array" resolve-label
332 ! Add byte array address to address being computed
334 ! Add an offset to start of byte array's data area
335 12 12 byte-array-offset ADDI
337 ! Done, store address in destination register