1 ! Copyright (C) 2005, 2008 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.c-types cpu.ppc.assembler
4 cpu.architecture generic kernel kernel.private math memory
5 namespaces sequences words assocs compiler.generator
6 compiler.generator.registers compiler.generator.fixup system
7 layouts classes words.private alien combinators
8 compiler.constants math.order make ;
9 IN: cpu.ppc.architecture
11 ! PowerPC register assignments
12 ! r3-r10, r16-r31: integer vregs
21 : reserved-area-size ( -- n )
25 } case cells ; foldable
31 } case cells ; foldable
33 : param@ ( n -- x ) reserved-area-size + ; inline
35 : param-save-size ( -- n ) 8 cells ; foldable
38 reserved-area-size param-save-size + + ; inline
40 : factor-area-size ( -- n ) 2 cells ; foldable
42 : next-save ( n -- i ) cell - ;
44 : xt-save ( n -- i ) 2 cells - ;
46 M: ppc stack-frame ( n -- i )
47 local@ factor-area-size + 4 cells align ;
49 M: temp-reg v>operand drop 11 ;
51 M: int-regs return-reg drop 3 ;
52 M: int-regs param-regs drop { 3 4 5 6 7 8 9 10 } ;
56 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
59 M: float-regs return-reg drop 1 ;
60 M: float-regs param-regs
62 { macosx { 1 2 3 4 5 6 7 8 9 10 11 12 13 } }
63 { linux { 1 2 3 4 5 6 7 8 } }
65 M: float-regs vregs drop { 0 1 2 3 4 5 6 7 8 9 10 11 12 13 } ;
67 GENERIC: loc>operand ( loc -- reg n )
69 M: ds-loc loc>operand n>> cells neg ds-reg swap ;
70 M: rs-loc loc>operand n>> cells neg rs-reg swap ;
72 M: immediate load-literal
73 [ v>operand ] bi@ LOAD ;
75 M: ppc load-indirect ( obj reg -- )
76 [ 0 swap LOAD32 rc-absolute-ppc-2/2 rel-literal ] keep
79 M: ppc %save-word-xt ( -- )
80 0 11 LOAD32 rc-absolute-ppc-2/2 rel-this ;
82 M: ppc %prologue ( n -- )
87 11 1 pick next-save STW
88 0 1 rot lr-save + STW ;
90 M: ppc %epilogue ( n -- )
91 #! At the end of each word that calls a subroutine, we store
92 #! the previous link register value in r0 by popping it off
93 #! the stack, set the link register to the contents of r0,
94 #! and jump to the link register.
95 0 1 pick lr-save + LWZ
99 : (%call) ( -- ) 11 MTLR BLRL ;
101 : (%jump) ( -- ) 11 MTCTR BCTR ;
103 : %load-dlsym ( symbol dll register -- )
104 0 swap LOAD32 rc-absolute-ppc-2/2 rel-dlsym ;
106 M: ppc %call ( label -- ) BL ;
108 M: ppc %jump-label ( label -- ) B ;
110 M: ppc %jump-f ( label -- )
111 0 "flag" operand f v>operand CMPI BEQ ;
113 M: ppc %dispatch ( -- )
116 0 11 LOAD32 rc-absolute-ppc-2/2 rel-here
117 "offset" operand "n" operand 1 SRAWI
118 11 11 "offset" operand ADD
122 { +input+ { { f "n" } } }
123 { +scratch+ { { f "offset" } } }
126 M: ppc %dispatch-label ( word -- )
127 0 , rc-absolute-cell rel-word ;
129 M: ppc %return ( -- ) %epilogue-later BLR ;
131 M: ppc %unwind drop %return ;
133 M: ppc %peek ( vreg loc -- )
134 >r v>operand r> loc>operand LWZ ;
137 >r v>operand r> loc>operand STW ;
139 M: ppc %unbox-float ( dst src -- )
140 [ v>operand ] bi@ float-offset LFD ;
142 M: ppc %inc-d ( n -- ) ds-reg dup rot cells ADDI ;
144 M: ppc %inc-r ( n -- ) rs-reg dup rot cells ADDI ;
146 M: int-regs %save-param-reg drop 1 rot local@ STW ;
148 M: int-regs %load-param-reg drop 1 rot local@ LWZ ;
150 GENERIC: STF ( src dst off reg-class -- )
152 M: single-float-regs STF drop STFS ;
154 M: double-float-regs STF drop STFD ;
156 M: float-regs %save-param-reg >r 1 rot local@ r> STF ;
158 GENERIC: LF ( dst src off reg-class -- )
160 M: single-float-regs LF drop LFS ;
162 M: double-float-regs LF drop LFD ;
164 M: float-regs %load-param-reg >r 1 rot local@ r> LF ;
166 M: stack-params %load-param-reg ( stack reg reg-class -- )
167 drop >r 0 1 rot local@ LWZ 0 1 r> param@ STW ;
169 M: stack-params %save-param-reg ( stack reg reg-class -- )
170 #! Funky. Read the parameter from the caller's stack frame.
171 #! This word is used in callbacks
173 0 1 rot param@ stack-frame* + LWZ
176 M: ppc %prepare-unbox ( -- )
177 ! First parameter is top of stack
179 ds-reg dup cell SUBI ;
181 M: ppc %unbox ( n reg-class func -- )
182 ! Value must be in r3
185 ! Store the return value on the C stack
186 over [ [ return-reg ] keep %save-param-reg ] [ 2drop ] if ;
188 M: ppc %unbox-long-long ( n func -- )
189 ! Value must be in r3:r4
192 ! Store the return value on the C stack
195 4 1 rot cell + local@ STW
198 M: ppc %unbox-large-struct ( n c-type -- )
199 ! Value must be in r3
200 ! Compute destination address
205 "to_value_struct" f %alien-invoke ;
207 M: ppc %box ( n reg-class func -- )
208 ! If the source is a stack location, load it into freg #0.
209 ! If the source is f, then we assume the value is already in
212 over [ 0 over param-reg swap %load-param-reg ] [ 2drop ] if
215 M: ppc %box-long-long ( n func -- )
218 4 1 rot cell + local@ LWZ
219 ] when* r> f %alien-invoke ;
221 : temp@ ( m -- n ) stack-frame* factor-area-size - swap - ;
223 : struct-return@ ( size n -- n ) [ local@ ] [ temp@ ] ?if ;
225 M: ppc %prepare-box-struct ( size -- )
226 #! Compute target address for value struct return
227 3 1 rot f struct-return@ ADDI
230 M: ppc %box-large-struct ( n c-type -- )
231 #! If n = f, then we're boxing a returned struct
233 [ swap struct-return@ ] keep
234 ! Compute destination address
239 "box_value_struct" f %alien-invoke ;
241 M: ppc %prepare-alien-invoke
242 #! Save Factor stack pointers in case the C code calls a
243 #! callback which does a GC, which must reliably trace
245 "stack_chain" f 11 %load-dlsym
251 M: ppc %alien-invoke ( symbol dll -- )
252 11 %load-dlsym (%call) ;
254 M: ppc %alien-callback ( quot -- )
255 3 load-indirect "c_to_factor" f %alien-invoke ;
257 M: ppc %prepare-alien-indirect ( -- )
258 "unbox_alien" f %alien-invoke
261 M: ppc %alien-indirect ( -- )
262 11 1 cell temp@ LWZ (%call) ;
264 M: ppc %callback-value ( ctype -- )
265 ! Save top of data stack
268 ! Restore data/call/retain stacks
269 "unnest_stacks" f %alien-invoke
270 ! Restore top of data stack
272 ! Unbox former top of data stack to return registers
275 M: ppc %cleanup ( alien-node -- ) drop ;
277 : %untag ( src dest -- ) 0 0 31 tag-bits get - RLWINM ;
279 : %tag-fixnum ( src dest -- ) tag-bits get SLWI ;
281 : %untag-fixnum ( dest src -- ) tag-bits get SRAWI ;
283 M: ppc value-structs?
284 #! On Linux/PPC, value structs are passed in the same way
285 #! as reference structs, we just have to make a copy first.
288 M: ppc fp-shadows-int? ( -- ? ) os macosx? ;
290 M: ppc small-enough? ( n -- ? ) -32768 32767 between? ;
292 M: ppc struct-small-enough? ( size -- ? ) drop f ;
294 M: ppc %box-small-struct
295 drop "No small structs" throw ;
297 M: ppc %unbox-small-struct
298 drop "No small structs" throw ;
301 M: ppc %unbox-byte-array ( dst src -- )
302 [ v>operand ] bi@ byte-array-offset ADDI ;
304 M: ppc %unbox-alien ( dst src -- )
305 [ v>operand ] bi@ alien-offset LWZ ;
307 M: ppc %unbox-f ( dst src -- )
308 drop 0 swap v>operand LI ;
310 M: ppc %unbox-any-c-ptr ( dst src -- )
311 { "is-byte-array" "end" "start" } [ define-label ] each
312 ! Address is computed in R12
314 ! Load object into R11
316 ! We come back here with displaced aliens
317 "start" resolve-label
319 0 11 f v>operand CMPI
322 ! Is the object an alien?
323 0 11 header-offset LWZ
324 0 0 alien type-number tag-fixnum CMPI
325 "is-byte-array" get BNE
326 ! If so, load the offset
327 0 11 alien-offset LWZ
328 ! Add it to address being computed
330 ! Now recurse on the underlying alien
331 11 11 underlying-alien-offset LWZ
333 "is-byte-array" resolve-label
334 ! Add byte array address to address being computed
336 ! Add an offset to start of byte array's data area
337 12 12 byte-array-offset ADDI
339 ! Done, store address in destination register