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One byte saving for setting reg A to $FF in 6809 LZSA2 depacker

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Doug Masten 2020-06-26 15:59:24 -05:00
parent c0f09db364
commit 56ba563794
1 changed files with 1 additions and 1 deletions
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asm/6809/unlzsa2.s
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@ -73,7 +73,7 @@ lz2nolt ldb ,s ; get token again, don't pop it from the stack
rolb ; shift Z flag from carry into bit 0 of B rolb ; shift Z flag from carry into bit 0 of B
eorb #$e1 ; set bits 5-7 of offset, reverse bit 0 eorb #$e1 ; set bits 5-7 of offset, reverse bit 0
lda #$ff ; set bits 8-15 of offset sex ; set bits 8-15 of offset to $FF
bra lz2gotof bra lz2gotof
lz2offs9 sex ; extend token's Z flag bit into reg A lz2offs9 sex ; extend token's Z flag bit into reg A