Apple-2gs-SW
/
65816-crypto
mirror of https://github.com/sheumann/65816-crypto.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Do some optimization of the rotates in SHA-256.

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
sha256.macros
View File

@ -230,7 +230,11 @@
&i seta (&part-1)*16
.loop2
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
lda temp3
eor temp2
@ -242,9 +246,13 @@
eor temp1+2
sta temp1+2
ROTR4MOVE_w temp2,&i-2,17
ROTR4MOVE_w temp3,&i-2,19
ROTR4MOVE_w temp4,&i-2,10
lda_w &i-2
sta temp2+2
lda_w &i-2,2
sta temp2
ROTR4 temp2,1
ROTR4MOVE temp3,temp2,2
ROTL4MOVE temp4,temp2,7
lda temp4
eor temp3
eor temp2
@ -292,7 +300,7 @@
; Sigma_1 computation
ROTR4MOVE temp1,&e,6
ROTR4MOVE temp2,&e,11
ROTR4MOVE temp2,temp1,5
ROTR4MOVE temp3,&e,25
lda temp1
eor temp2
@ -352,7 +360,11 @@
;Sigma_0 computation
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
lda temp2
eor temp3