Skip to content

SP ARM64 asm: fix Montgomery reduction by 4 #6947

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
JacobBarthelmeh merged 1 commit into from
Nov 9, 2023
+6 −0
Merged

SP ARM64 asm: fix Montgomery reduction by 4 #6947

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions wolfcrypt/src/sp_arm64.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40512,6 +40512,8 @@ static void sp_256_mont_mul_order_4(sp_digit* r, const sp_digit* a, const sp_dig
"adcs x11, x11, x3\n\t"
"umulh x4, x16, x17\n\t"
"adcs x12, x12, x4\n\t"
"# x15 == -1\n\t"
"adcs x19, x19, x15\n\t"
"csel x13, x13, xzr, cs\n\t"
"csel x14, x14, xzr, cs\n\t"
"csel x15, x15, xzr, cs\n\t"
Expand Down Expand Up @@ -40703,6 +40705,8 @@ static void sp_256_mont_sqr_order_4(sp_digit* r, const sp_digit* a)
"adcs x10, x10, x2\n\t"
"umulh x3, x15, x16\n\t"
"adcs x11, x11, x3\n\t"
"# x14 == -1\n\t"
"adcs x17, x17, x14\n\t"
"csel x12, x12, xzr, cs\n\t"
"csel x13, x13, xzr, cs\n\t"
"csel x14, x14, xzr, cs\n\t"
Expand Down Expand Up @@ -40889,6 +40893,8 @@ static void sp_256_mont_sqr_n_order_4(sp_digit* r, const sp_digit* a, int n)
"adcs x10, x10, x2\n\t"
"umulh x3, x15, x16\n\t"
"adcs x11, x11, x3\n\t"
"# x14 == -1\n\t"
"adcs x17, x17, x14\n\t"
"csel x12, x12, xzr, cs\n\t"
"csel x13, x13, xzr, cs\n\t"
"csel x14, x14, xzr, cs\n\t"
Expand Down