89 lines
2.8 KiB
Factor
89 lines
2.8 KiB
Factor
! Copyright (C) 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: assembler
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USING: alien compiler inference kernel kernel-internals lists
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math memory namespaces sequences words ;
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GENERIC: v>operand
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M: integer v>operand ;
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M: vreg v>operand vreg-n { EAX ECX EDX } nth ;
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! Not used on x86
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M: %prologue generate-node drop ;
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: compile-call-label ( label -- ) 0 CALL relative ;
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: compile-jump-label ( label -- ) 0 JMP relative ;
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M: %call-label generate-node ( vop -- )
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vop-label compile-call-label ;
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M: %jump generate-node ( vop -- )
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vop-label dup postpone-word compile-jump-label ;
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M: %jump-f generate-node ( vop -- )
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dup vop-source v>operand f address CMP 0 JNE
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vop-label relative ;
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M: %jump-t generate-node ( vop -- )
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dup vop-source v>operand f address CMP 0 JE
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vop-label relative ;
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M: %return-to generate-node ( vop -- )
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0 PUSH vop-label absolute ;
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M: %return generate-node ( vop -- )
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drop RET ;
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M: %untag generate-node ( vop -- )
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vop-source v>operand BIN: 111 bitnot AND ;
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M: %slot generate-node ( vop -- )
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! the untagged object is in vop-dest, the tagged slot number
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! is in vop-literal.
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dup vop-literal v>operand swap vop-dest v>operand
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! turn tagged fixnum slot # into an offset, multiple of 4
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over 1 SHR
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! compute slot address in vop-dest
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dupd ADD
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! load slot value in vop-dest
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dup unit MOV ;
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M: %fast-slot generate-node ( vop -- )
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! the tagged object is in vop-dest, the pointer offset is
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! in vop-literal. the offset already takes the type tag
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! into account, so its just one instruction to load.
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dup vop-literal swap vop-dest v>operand tuck >r 2list r>
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swap MOV ;
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M: %set-slot generate-node ( vop -- )
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! the untagged object is in vop-dest, the new value is in
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! vop-source, the tagged slot number is in vop-literal.
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dup vop-literal v>operand over vop-dest v>operand
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! turn tagged fixnum slot # into an offset, multiple of 4
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over 1 SHR
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! compute slot address in vop-dest
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dupd ADD
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! store new slot value
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>r vop-source v>operand r> unit swap MOV ;
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M: %fast-set-slot generate-node ( vop -- )
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! the tagged object is in vop-dest, the new value is in
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! vop-source, the pointer offset is in vop-literal. the
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! offset already takes the type tag into account, so its
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! just one instruction to load.
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dup vop-literal over vop-dest v>operand swap 2list
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swap vop-source v>operand MOV ;
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\ dispatch [
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#! Compile a piece of code that jumps to an offset in a
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#! jump table indexed by the fixnum at the top of the stack.
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#! The jump table must immediately follow this macro.
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drop
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POP-DS
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EAX 1 SHR
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EAX HEX: ffff ADD just-compiled f rel-address
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[ EAX ] JMP
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compile-aligned
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compiled-offset swap set-compiled-cell ( fixup -- )
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] "generator" set-word-prop
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