2 USING: arrays generic kernel kernel-internals math memory
5 ! Does the assembler emit bytes or cells?
6 DEFER: code-format ( -- byte# )
8 ! A scratch register for computations
11 C: vreg ( n reg-class -- vreg )
12 [ set-delegate ] keep [ set-vreg-n ] keep ;
16 TUPLE: float-regs size ;
18 : <int-vreg> ( n -- vreg ) T{ int-regs } <vreg> ;
19 : <float-vreg> ( n -- vreg ) T{ float-regs f 8 } <vreg> ;
21 ! A pseudo-register class for parameters spilled on the stack
24 ! Return values of this class go here
25 GENERIC: return-reg ( register-class -- reg )
27 ! Sequence of registers used for parameter passing in class
28 GENERIC: fastcall-regs ( register-class -- regs )
30 ! Sequence mapping vreg-n to native assembler registers
31 GENERIC: vregs ( register-class -- regs )
33 ! Map a sequence of literals to f or float
34 DEFER: literal-template ( literals -- template )
36 ! Load a literal (immediate or indirect)
37 G: load-literal ( obj vreg -- ) 1 standard-combination ;
39 ! Set up caller stack frame
40 DEFER: %prologue ( n -- )
42 ! Tear down stack frame
43 DEFER: %epilogue ( -- )
45 ! Tail call another word
46 DEFER: %jump ( label -- )
49 DEFER: %call ( label -- )
51 ! Local jump for branches or tail calls in nested #label
52 DEFER: %jump-label ( label -- )
54 ! Test if vreg is 'f' or not
55 DEFER: %jump-t ( label vreg -- )
57 ! Jump table of addresses (one cell each) is right after this
58 DEFER: %dispatch ( -- )
61 DEFER: %target ( label -- )
66 ! Change datastack height
67 DEFER: %inc-d ( n -- )
69 ! Change callstack height
70 DEFER: %inc-r ( n -- )
72 ! Load stack into vreg
73 GENERIC: (%peek) ( vreg loc reg-class -- )
74 : %peek ( vreg loc -- ) over (%peek) ;
77 GENERIC: (%replace) ( vreg loc reg-class -- )
78 : %replace ( vreg loc -- ) over (%replace) ;
80 ! Move one vreg to another
81 DEFER: %move-int>int ( dst src -- )
82 DEFER: %move-int>float ( dst src -- )
84 : %move ( dst src -- )
88 2dup [ delegate class ] 2apply 2array {
89 { [ dup { int-regs int-regs } = ] [ drop %move-int>int ] }
90 { [ dup { float-regs int-regs } = ] [ drop %move-int>float ] }
95 DEFER: %unbox ( n reg-class func -- )
97 DEFER: %unbox-struct ( n size -- )
99 DEFER: %box ( n reg-class func -- )
101 DEFER: %box-struct ( n size -- )
103 GENERIC: %freg>stack ( stack reg reg-class -- )
105 GENERIC: %stack>freg ( stack reg reg-class -- )
107 DEFER: %alien-invoke ( library function -- )
109 DEFER: %cleanup ( n -- )
111 DEFER: %alien-callback ( quot -- )
113 DEFER: %callback-value ( reg-class func -- )
115 DEFER: %prepare-alien-indirect ( -- )
117 DEFER: %alien-indirect ( -- )
119 M: stack-params fastcall-regs drop 0 ;
121 GENERIC: reg-size ( register-class -- n )
123 GENERIC: inc-reg-class ( register-class -- )
125 M: int-regs reg-size drop cell ;
129 macosx? [ reg-size stack-params +@ ] [ drop ] if ;
131 M: int-regs inc-reg-class
134 M: float-regs reg-size float-regs-size ;
136 M: float-regs inc-reg-class
138 macosx? [ reg-size 4 / int-regs +@ ] [ drop ] if ;
140 GENERIC: v>operand ( obj -- operand )
141 M: integer v>operand tag-bits shift ;
142 M: vreg v>operand dup vreg-n swap vregs nth ;
143 M: f v>operand drop object-tag ;