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Small optimization to eliminate some unnecessary loads in MD5.

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This commit is contained in:
Stephen Heumann 2017-07-04 14:31:04 -05:00
parent 129f371902
commit e90af7c1a4
1 changed files with 16 additions and 7 deletions
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23
md5.macros
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@ -133,7 +133,7 @@
* Left-rotate with various optimizations applied
macro
ROTL4AUTO &loc,&n
ROTL4AUTO &loc,&n,&haveLocPlus2
aif &n>5,.skip1
ROTL4 &loc,&n
mexit
@ -158,22 +158,31 @@
mexit
.skip3
aif &n>15,.skip4
lda &loc
aif C:&haveLocPlus2>0,.noload1
ldy &loc+2
ago .didload1
.noload1
tay
.didload1
lda &loc
sta &loc+2
sty &loc
ROTR4CONT &loc,16-&n
mexit
.skip4
aif &n>16,.skip5
lda &loc
ldy &loc+2
sta &loc+2
sty &loc
aif C:&haveLocPlus2>0,.noload2
lda &loc+2
.noload2
ldy &loc
sta &loc
sty &loc+2
mexit
.skip5
aif &n>20,.skip6
aif C:&haveLocPlus2>0,.noload2
lda &loc+2
.noload2
ldy &loc
sta &loc
sty &loc+2
@ -312,7 +321,7 @@
iny
sty idx
ROTL4AUTO temp,&shift
ROTL4AUTO temp,&shift,1
clc
lda &b