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| author | Niels Möller <nisse@lysator.liu.se> | 2023-04-08 21:37:42 +0200 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2023-04-08 21:37:42 +0200 |
| commit | b39269babf4035d53b69f5021893fb03595c9f12 (patch) | |
| tree | 001920a57347c82b52dc72fc833e9328e65923b7 | |
| parent | 13fc36ff54fb0fd6095965d0cb870c0710f1746b (diff) | |
| download | nettle-b39269babf4035d53b69f5021893fb03595c9f12.tar.gz | |
Do four bits per iteration.
| -rw-r--r-- | x86_64/ghash-update.asm | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/x86_64/ghash-update.asm b/x86_64/ghash-update.asm index 649f8680..978ef327 100644 --- a/x86_64/ghash-update.asm +++ b/x86_64/ghash-update.asm @@ -38,9 +38,11 @@ define(`BLOCKS', `%rdx') define(`SRC', `%rcx') define(`CNT', `%rax') define(`X', `%xmm0') -define(`M0', `%xmm1') -define(`M1', `%xmm2') -define(`R', `%xmm3') +define(`R', `%xmm1') +define(`M0', `%xmm2') +define(`M1', `%xmm3') +define(`M2', `%xmm4') +define(`M3', `%xmm5') .file "ghash-update.asm" @@ -51,7 +53,7 @@ define(`R', `%xmm3') .text ALIGN(16) PROLOGUE(_nettle_ghash_update) - W64_ENTRY(4, 4) + W64_ENTRY(4, 6) sub $1, BLOCKS movups (XP), X jc .Ldone @@ -62,18 +64,24 @@ ALIGN(16) movups (SRC), M0 pxor M0, X pxor R, R - mov $1008, CNT + mov $496, CNT ALIGN(16) .Loop_bit: movaps X, M0 psrad $31, M0 - pshufd $0xff, M0, M1 - pshufd $0x55, M0, M0 + pshufd $0xff, M0, M3 + pshufd $0xaa, M0, M2 + pshufd $0x55, M0, M1 + pshufd $0x00, M0, M0 psllq $1, X pand (KEY, CNT), M0 - pand 1024(KEY, CNT), M1 - pxor M0, R + pand 512(KEY, CNT), M1 + pand 1024(KEY, CNT), M2 + pand 1536(KEY, CNT), M3 + pxor M0, M1 + pxor M2, M3 pxor M1, R + pxor M3, R sub $16, CNT jnc .Loop_bit @@ -87,6 +95,6 @@ ALIGN(16) .Ldone: movups X, (XP) mov SRC, %rax - W64_EXIT(4, 4) + W64_EXIT(4, 6) ret EPILOGUE(_nettle_ghash_update) |