2020-03-23 06:26:43 +00:00
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// Test effective live range and register allocation
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// Here outsw::sw and outw::w should have the same allocation
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2020-12-21 07:57:41 +00:00
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// Commodore 64 PRG executable file
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.file [name="liverange-10.prg", type="prg", segments="Program"]
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.segmentdef Program [segments="Basic, Code, Data"]
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.segmentdef Basic [start=$0801]
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.segmentdef Code [start=$80d]
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.segmentdef Data [startAfter="Code"]
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.segment Basic
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2020-03-23 06:26:43 +00:00
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:BasicUpstart(main)
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.label SCREEN = $400
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2020-12-21 07:57:41 +00:00
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.segment Code
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2020-03-23 06:26:43 +00:00
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main: {
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2021-09-23 06:24:56 +00:00
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.label sw = 4
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.label w = 2
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2020-03-23 06:26:43 +00:00
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ldx #0
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lda #<-$14
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sta.z sw
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lda #>-$14
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sta.z sw+1
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__b1:
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// outsw(sw)
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lda.z sw
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sta.z outsw.sw
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lda.z sw+1
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sta.z outsw.sw+1
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jsr outsw
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// for(signed int sw: -20..19 )
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inc.z sw
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bne !+
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inc.z sw+1
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!:
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lda.z sw+1
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cmp #>$14
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bne __b1
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lda.z sw
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cmp #<$14
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bne __b1
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lda #<0
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sta.z w
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sta.z w+1
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__b2:
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// outw(w)
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jsr outw
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// for(unsigned int w: 0..39 )
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inc.z w
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bne !+
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inc.z w+1
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!:
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lda.z w+1
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bne __b2
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lda.z w
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2021-06-28 22:49:38 +00:00
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cmp #$28
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2020-03-23 06:26:43 +00:00
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bne __b2
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// }
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rts
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}
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2021-09-23 06:24:56 +00:00
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// void outsw(__zp(2) int sw)
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2020-06-27 21:26:57 +00:00
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outsw: {
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2021-09-23 06:24:56 +00:00
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.label sw = 2
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2020-06-27 21:26:57 +00:00
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// if(sw<0)
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lda.z sw+1
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bpl __b1
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// out('-')
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lda #'-'
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jsr out
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// sw = -sw
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lda #0
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2021-06-29 22:58:50 +00:00
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sec
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2020-06-27 21:26:57 +00:00
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sbc.z sw
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sta.z sw
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lda #0
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sbc.z sw+1
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sta.z sw+1
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__b1:
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// outw((unsigned int)sw)
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jsr outw
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// }
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rts
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}
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2021-09-23 06:24:56 +00:00
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// void outw(__zp(2) unsigned int w)
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2020-03-23 06:26:43 +00:00
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outw: {
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2021-09-23 06:24:56 +00:00
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.label w = 2
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2021-06-12 18:57:35 +00:00
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// BYTE1(w)
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2020-03-23 06:26:43 +00:00
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lda.z w+1
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2021-06-12 18:57:35 +00:00
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// BYTE1(w)<<4
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2020-03-23 06:26:43 +00:00
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asl
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asl
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asl
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asl
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2021-06-12 18:57:35 +00:00
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// out(HEXTAB[BYTE1(w)<<4])
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2020-03-23 06:26:43 +00:00
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tay
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lda HEXTAB,y
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jsr out
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2021-06-12 18:57:35 +00:00
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// BYTE1(w)
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2020-03-23 06:26:43 +00:00
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lda.z w+1
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2021-06-12 18:57:35 +00:00
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// BYTE1(w)&0x0f
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2020-03-23 06:26:43 +00:00
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and #$f
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2021-06-12 18:57:35 +00:00
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// out(HEXTAB[BYTE1(w)&0x0f])
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2020-03-23 06:26:43 +00:00
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tay
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lda HEXTAB,y
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jsr out
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2021-06-12 18:57:35 +00:00
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// BYTE0(w)
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2020-03-23 06:26:43 +00:00
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lda.z w
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2021-06-12 18:57:35 +00:00
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// BYTE0(w)<<4
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2020-03-23 06:26:43 +00:00
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asl
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asl
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asl
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asl
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2021-06-12 18:57:35 +00:00
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// out(HEXTAB[BYTE0(w)<<4])
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2020-03-23 06:26:43 +00:00
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tay
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lda HEXTAB,y
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jsr out
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2021-06-12 18:57:35 +00:00
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// BYTE0(w)
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2020-03-23 06:26:43 +00:00
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lda.z w
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2021-06-12 18:57:35 +00:00
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// BYTE0(w)&0x0f
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2020-03-23 06:26:43 +00:00
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and #$f
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2021-06-12 18:57:35 +00:00
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// out(HEXTAB[BYTE0(w)&0x0f])
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2020-03-23 06:26:43 +00:00
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tay
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lda HEXTAB,y
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jsr out
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// }
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rts
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}
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2021-08-10 15:48:55 +00:00
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// void out(__register(A) char c)
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2020-03-23 06:26:43 +00:00
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out: {
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// idx++;
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inx
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// SCREEN[idx] = c
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sta SCREEN,x
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// }
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rts
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}
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2020-12-21 07:57:41 +00:00
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.segment Data
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2020-03-23 06:26:43 +00:00
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HEXTAB: .text "0123456789abcdef"
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.byte 0
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