50 lines
1.4 KiB
Factor
50 lines
1.4 KiB
Factor
! Copyright (C) 2008, 2010 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors alien.c-types arrays assocs
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compiler.cfg.builder.alien.boxing cpu.architecture cpu.x86
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cpu.x86.assembler cpu.x86.assembler.operands kernel layouts make math
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math.order sequences splitting system ;
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IN: cpu.x86.64.unix
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M: x86.64 param-regs
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drop {
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{ int-regs { RDI RSI RDX RCX R8 R9 } }
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{ float-regs { XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 } }
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} ;
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M: x86.64 reserved-stack-space 0 ;
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: struct-types&offset ( struct-type -- pairs )
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fields>> [
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[ type>> ] [ offset>> ] bi 2array
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] map ;
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: split-struct ( pairs -- seq )
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[
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[ 8 mod zero? [ t , ] when , ] assoc-each
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] { } make { t } split harvest ;
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: flatten-small-struct ( c-type -- seq )
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struct-types&offset split-struct [
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[ lookup-c-type c-type-rep reg-class-of ] map
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int-regs swap member? int-rep double-rep ?
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f f 3array
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] map ;
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M: x86.64 flatten-struct-type ( c-type -- seq )
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dup heap-size 16 <=
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[ flatten-small-struct ] [ call-next-method [ first t f 3array ] map ] if ;
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M: x86.64 return-struct-in-registers? ( c-type -- ? )
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heap-size 2 cells <= ;
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M: x86.64 dummy-stack-params? f ;
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M: x86.64 dummy-int-params? f ;
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M: x86.64 dummy-fp-params? f ;
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M: x86.64 %prepare-var-args ( reg-inputs -- )
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[ second reg-class-of float-regs? ] count 8 min
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[ EAX EAX XOR ] [ <byte> AL swap MOV ] if-zero ;
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