41 lines
1.2 KiB
Factor
41 lines
1.2 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: compiler errors kernel math memory words ;
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! Pushing and popping the data stack.
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: PEEK-DS 18 14 0 LWZ ;
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: POP-DS PEEK-DS 14 14 4 SUBI ;
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: PUSH-DS 18 14 4 STWU ;
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: REPL-DS 18 14 0 STW ;
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! Pushing and popping the return stack.
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: PEEK-CS 18 15 0 LWZ ;
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: POP-CS PEEK-CS 15 15 4 SUBI ;
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: PUSH-CS 18 15 4 STWU ;
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: w>h/h dup -16 shift HEX: ffff bitand >r HEX: ffff bitand r> ;
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: immediate-literal ( obj -- )
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#! PowerPC cannot load a 32 bit literal in one instruction.
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address dup HEX: ffff <= [
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18 LI
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] [
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w>h/h 18 LIS 18 18 rot ORI
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] ifte ;
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#push-immediate [
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immediate-literal PUSH-DS
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] "generator" set-word-prop
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#replace-immediate [
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immediate-literal REPL-DS
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] "generator" set-word-prop
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\ drop [ drop 14 14 4 SUBI ] "generator" set-word-prop
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\ dup [ drop PEEK-DS PUSH-DS ] "generator" set-word-prop
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\ over [ drop 18 14 -4 LWZ PUSH-DS ] "generator" set-word-prop
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\ pick [ drop 18 14 -8 LWZ PUSH-DS ] "generator" set-word-prop
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\ >r [ drop POP-DS PUSH-CS ] "generator" set-word-prop
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\ r> [ drop POP-CS PUSH-DS ] "generator" set-word-prop
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