Apple-2gs-SW/65816-crypto
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Do some optimization of the rotates in SHA-256.

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This commit is contained in:
Stephen Heumann 2017-07-03 14:46:46 -05:00
parent 61bc8f8b4f
commit 64fc1e62bb
1 changed files with 18 additions and 6 deletions
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24
sha256.macros
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@ -230,7 +230,11 @@
&i seta (&part-1)*16 &i seta (&part-1)*16
.loop2 .loop2
ROTR4MOVE_w temp1,&i-15,7 ROTR4MOVE_w temp1,&i-15,7
ROTR4MOVE_w temp2,&i-15,18 lda_w &i-15
sta temp2+2
lda_w &i-15,2
sta temp2
ROTR4 temp2,2
ROTR4MOVE_w temp3,&i-15,3 ROTR4MOVE_w temp3,&i-15,3
lda temp3 lda temp3
eor temp2 eor temp2
@ -242,9 +246,13 @@
eor temp1+2 eor temp1+2
sta temp1+2 sta temp1+2
ROTR4MOVE_w temp2,&i-2,17 lda_w &i-2
ROTR4MOVE_w temp3,&i-2,19 sta temp2+2
ROTR4MOVE_w temp4,&i-2,10 lda_w &i-2,2
sta temp2
ROTR4 temp2,1
ROTR4MOVE temp3,temp2,2
ROTL4MOVE temp4,temp2,7
lda temp4 lda temp4
eor temp3 eor temp3
eor temp2 eor temp2
@ -292,7 +300,7 @@
; Sigma_1 computation ; Sigma_1 computation
ROTR4MOVE temp1,&e,6 ROTR4MOVE temp1,&e,6
ROTR4MOVE temp2,&e,11 ROTR4MOVE temp2,temp1,5
ROTR4MOVE temp3,&e,25 ROTR4MOVE temp3,&e,25
lda temp1 lda temp1
eor temp2 eor temp2
@ -352,7 +360,11 @@
;Sigma_0 computation ;Sigma_0 computation
ROTR4MOVE temp2,&a,2 ROTR4MOVE temp2,&a,2
ROTR4MOVE temp3,&a,13 lda &a
sta temp3+2
lda &a+2
sta temp3
ROTL4 temp3,3
ROTR4MOVE temp4,&a,22 ROTR4MOVE temp4,&a,22
lda temp2 lda temp2
eor temp3 eor temp3