mirror of
https://github.com/fadden/6502bench.git
synced 2024-12-01 22:50:35 +00:00
5b75ae35fc
For nonzero values we were leaving Z=prev, which is wrong when Z=0 because the AND result might be zero. Now if Z=1 we leave it alone, but if Z=0 we now set it to Z=?. Test 1003-flags-and-branches was testing for the (incorrect) behavior, so we're now running into a BRK. This is fine.
271 lines
4.3 KiB
ArmAsm
271 lines
4.3 KiB
ArmAsm
.setcpu "65816"
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; .segment "SEG000"
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.org $1000
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.a8
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.i8
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clc
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xce
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sep #$ff
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clv
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cld
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cli
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clc
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lda #$80
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lda #$01
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sed
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sei
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sec
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lda #$ff
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adc #$00
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sep #$ff
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rep #$80
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rep #$40
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rep #$20
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.a16
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rep #$10
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.i16
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rep #$08
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rep #$04
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rep #$02
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rep #$01
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sep #$00
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sep #$ff
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.a8
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.i8
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rep #$00
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rep #$ff
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.a16
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.i16
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lda #$feed
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sec
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xce
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.a8
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.i8
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lda #$ff
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rep #$30
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lda #$ff
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clc
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xce
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lda #$ff
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rep #$20
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.a16
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sep #$10
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lda #$0000
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ldx #$01
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ldy #$02
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sep #$20
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.a8
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rep #$10
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.i16
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lda #$01
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ldx #$0000
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ldy #$0000
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sep #$30
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.i8
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lda #$00
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pha
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plp
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rep #$80
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bpl L105F
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.byte $00
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.byte $00
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L105F: sep #$80
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bpl @L1065
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bmi @L1067
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@L1065: .byte $00
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.byte $00
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@L1067: rep #$40
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bvc @L106D
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.byte $00
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.byte $00
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@L106D: sep #$40
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bvs @L1073
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.byte $00
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.byte $00
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@L1073: rep #$01
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bcc @L1079
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.byte $00
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.byte $00
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@L1079: sep #$01
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bcs @L107F
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.byte $00
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.byte $00
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@L107F: rep #$02
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bne @L1085
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.byte $00
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.byte $00
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@L1085: sep #$02
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beq @L108B
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.byte $00
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.byte $00
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@L108B: sep #$ff
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lda #$01
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bne @L1093
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.byte $00
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.byte $db
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@L1093: lda #$00
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beq @L1099
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.byte $00
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.byte $db
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@L1099: bpl @L109D
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.byte $00
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.byte $db
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@L109D: lda #$80
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bmi @L10A3
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.byte $00
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.byte $db
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@L10A3: lda #$ff
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and #$00
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beq @L10AB
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.byte $00
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.byte $db
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@L10AB: lda #$00
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and #$ff
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beq @L10B3
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.byte $00
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.byte $db
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@L10B3: lda #$ff
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and #$7f
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bne @L10BB
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brk
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.byte $db
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@L10BB: bpl @L10BF
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.byte $00
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.byte $db
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@L10BF: lda #$ff
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and #$80
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bmi @L10C7
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.byte $00
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.byte $db
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@L10C7: lda #$00
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ora #$00
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beq @L10CF
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.byte $00
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.byte $db
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@L10CF: ora #$01
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bne @L10D5
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.byte $00
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.byte $db
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@L10D5: lda #$00
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ora #$7f
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bpl @L10DD
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.byte $00
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.byte $db
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@L10DD: ora #$80
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bmi @L10E3
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.byte $00
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.byte $db
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@L10E3: lda @L10E3
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sec
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ror A
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bmi @L10EC
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.byte $00
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.byte $dc
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@L10EC: clc
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ror A
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bpl @L10F2
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.byte $00
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.byte $dc
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@L10F2: lda #$00
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sec
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rol A
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bne @L10FA
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.byte $00
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.byte $dc
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@L10FA: clc
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php
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sec
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plp
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bcc @L1102
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.byte $00
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.byte $00
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@L1102: sec
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bcs @L1106
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@L1105: clc
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@L1106: lda $33
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beq @L1105
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bcs @L110E
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lda $44
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@L110E: nop
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rep #$20
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.a16
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sep #$10
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jsr @L112A
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rep #$30
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.i16
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jsr @L1130
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sep #$30
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.a8
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.i8
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jsr @L1130
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rep #$20
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.a16
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sep #$10
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jsr @L112A
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sep #$30
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.a8
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rts
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.a16
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@L112A: lda #$1234
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ldx #$ff
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rts
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.a8
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@L1130: lda #$ff
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ldx #$ee
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ldy #$dd
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rts
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