1 ! Copyright (C) 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.c-types arrays assocs classes.struct fry
4 kernel layouts locals math namespaces sequences
5 sequences.generalizations system
6 compiler.cfg.builder.alien.params compiler.cfg.hats
7 compiler.cfg.instructions cpu.architecture ;
8 IN: compiler.cfg.builder.alien.boxing
10 SYMBOL: struct-return-area
12 ! pairs have shape { rep on-stack? }
13 GENERIC: flatten-c-type ( c-type -- pairs )
15 M: c-type flatten-c-type
16 rep>> f 2array 1array ;
18 M: long-long-type flatten-c-type
19 drop 2 [ int-rep long-long-on-stack? 2array ] replicate ;
21 HOOK: flatten-struct-type cpu ( type -- pairs )
23 M: object flatten-struct-type
24 heap-size cell align cell /i { int-rep f } <repetition> ;
26 M: struct-c-type flatten-c-type
29 : stack-size ( c-type -- n )
30 base-type flatten-c-type keys 0 [ rep-size + ] reduce ;
32 : component-offsets ( reps -- offsets )
33 0 [ rep-size + ] accumulate nip ;
35 :: explode-struct ( src c-type -- vregs reps )
36 c-type flatten-struct-type :> reps
37 reps keys dup component-offsets
38 [| rep offset | src offset rep f ^^load-memory-imm ] 2map
41 :: implode-struct ( src vregs reps -- )
42 vregs reps dup component-offsets
43 [| vreg rep offset | vreg src offset rep f ##store-memory-imm ] 3each ;
45 GENERIC: unbox ( src c-type -- vregs reps )
48 [ unboxer>> ] [ rep>> ] bi
49 [ ^^unbox 1array ] [ nip f 2array 1array ] 2bi ;
51 M: long-long-type unbox
52 [ 8 cell f ^^local-allot ] dip '[ _ unboxer>> ##unbox-long-long ] keep
53 0 cell [ int-rep f ^^load-memory-imm ] bi-curry@ bi 2array
54 int-rep long-long-on-stack? 2array dup 2array ;
56 M: struct-c-type unbox ( src c-type -- vregs )
57 [ ^^unbox-any-c-ptr ] dip explode-struct ;
59 : frob-struct ( c-type -- c-type )
60 dup value-struct? [ drop void* base-type ] unless ;
62 GENERIC: unbox-parameter ( src c-type -- vregs reps )
64 M: c-type unbox-parameter unbox ;
66 M: long-long-type unbox-parameter unbox ;
68 M: struct-c-type unbox-parameter
69 dup value-struct? [ unbox ] [
70 [ nip heap-size cell f ^^local-allot dup ]
71 [ [ ^^unbox-any-c-ptr ] dip explode-struct keys ] 2bi
73 1array { { int-rep f } }
76 GENERIC: unbox-return ( src c-type -- )
78 : store-return ( vregs reps -- )
80 [ [ next-return-reg ] keep ##store-reg-param ] 2each
83 : (unbox-return) ( src c-type -- vregs reps )
84 ! Don't care about on-stack? flag when looking at return
88 M: c-type unbox-return (unbox-return) store-return ;
90 M: long-long-type unbox-return (unbox-return) store-return ;
92 M: struct-c-type unbox-return
93 dup return-struct-in-registers?
94 [ (unbox-return) store-return ]
95 [ [ struct-return-area get ] 2dip (unbox-return) implode-struct ] if ;
97 GENERIC: flatten-parameter-type ( c-type -- reps )
99 M: c-type flatten-parameter-type flatten-c-type ;
101 M: long-long-type flatten-parameter-type flatten-c-type ;
103 M: struct-c-type flatten-parameter-type frob-struct flatten-c-type ;
105 GENERIC: box ( vregs reps c-type -- dst )
108 [ first ] [ drop ] [ [ boxer>> ] [ rep>> ] bi ] tri* ^^box ;
110 M: long-long-type box
111 [ first2 ] [ drop ] [ boxer>> ] tri* ^^box-long-long ;
114 '[ _ heap-size ^^allot-byte-array dup ^^unbox-byte-array ] 2dip
117 GENERIC: box-parameter ( vregs reps c-type -- dst )
119 M: c-type box-parameter box ;
121 M: long-long-type box-parameter box ;
123 M: struct-c-type box-parameter
125 [ [ [ drop first ] dip explode-struct keys ] keep ] unless
128 GENERIC: box-return ( c-type -- dst )
130 : load-return ( c-type -- vregs reps )
133 [ [ [ next-return-reg ] keep ^^load-reg-param ] map ] keep
136 M: c-type box-return [ load-return ] keep box ;
138 M: long-long-type box-return [ load-return ] keep box ;
140 M: struct-c-type box-return
142 dup return-struct-in-registers?
144 [ [ struct-return-area get ] dip explode-struct keys ] if