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lib/crypto: x86/blake2s: Reduce size of BLAKE2S_SIGMA2

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Save 480 bytes of .rodata by replacing the .long constants with .bytes,
and using the vpmovzxbd instruction to expand them.

Also update the code to do the loads before incrementing %rax rather
than after.  This avoids the need for the first load to use an offset.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250827151131.27733-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Eric Biggers
2025-08-27 08:11:26 -07:00
parent 13cecc526d
commit 453eda46b7
1 changed files with 14 additions and 14 deletions
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28
lib/crypto/x86/blake2s-core.S
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@@ -29,19 +29,19 @@ SIGMA:
.byte 13, 7, 12, 3, 11, 14, 1, 9, 2, 5, 15, 8, 10, 0, 4, 6
.byte 6, 14, 11, 0, 15, 9, 3, 8, 10, 12, 13, 1, 5, 2, 7, 4
.byte 10, 8, 7, 1, 2, 4, 6, 5, 13, 15, 9, 3, 0, 11, 14, 12
.section .rodata.cst64.BLAKE2S_SIGMA2, "aM", @progbits, 640
.section .rodata.cst64.BLAKE2S_SIGMA2, "aM", @progbits, 160
.align 64
SIGMA2:
.long 0, 2, 4, 6, 1, 3, 5, 7, 14, 8, 10, 12, 15, 9, 11, 13
.long 8, 2, 13, 15, 10, 9, 12, 3, 6, 4, 0, 14, 5, 11, 1, 7
.long 11, 13, 8, 6, 5, 10, 14, 3, 2, 4, 12, 15, 1, 0, 7, 9
.long 11, 10, 7, 0, 8, 15, 1, 13, 3, 6, 2, 12, 4, 14, 9, 5
.long 4, 10, 9, 14, 15, 0, 11, 8, 1, 7, 3, 13, 2, 5, 6, 12
.long 2, 11, 4, 15, 14, 3, 10, 8, 13, 6, 5, 7, 0, 12, 1, 9
.long 4, 8, 15, 9, 14, 11, 13, 5, 3, 2, 1, 12, 6, 10, 7, 0
.long 6, 13, 0, 14, 12, 2, 1, 11, 15, 4, 5, 8, 7, 9, 3, 10
.long 15, 5, 4, 13, 10, 7, 3, 11, 12, 2, 0, 6, 9, 8, 1, 14
.long 8, 7, 14, 11, 13, 15, 0, 12, 10, 4, 5, 6, 3, 2, 1, 9
.byte 0, 2, 4, 6, 1, 3, 5, 7, 14, 8, 10, 12, 15, 9, 11, 13
.byte 8, 2, 13, 15, 10, 9, 12, 3, 6, 4, 0, 14, 5, 11, 1, 7
.byte 11, 13, 8, 6, 5, 10, 14, 3, 2, 4, 12, 15, 1, 0, 7, 9
.byte 11, 10, 7, 0, 8, 15, 1, 13, 3, 6, 2, 12, 4, 14, 9, 5
.byte 4, 10, 9, 14, 15, 0, 11, 8, 1, 7, 3, 13, 2, 5, 6, 12
.byte 2, 11, 4, 15, 14, 3, 10, 8, 13, 6, 5, 7, 0, 12, 1, 9
.byte 4, 8, 15, 9, 14, 11, 13, 5, 3, 2, 1, 12, 6, 10, 7, 0
.byte 6, 13, 0, 14, 12, 2, 1, 11, 15, 4, 5, 8, 7, 9, 3, 10
.byte 15, 5, 4, 13, 10, 7, 3, 11, 12, 2, 0, 6, 9, 8, 1, 14
.byte 8, 7, 14, 11, 13, 15, 0, 12, 10, 4, 5, 6, 3, 2, 1, 9
.text
SYM_FUNC_START(blake2s_compress_ssse3)
@@ -193,9 +193,9 @@ SYM_FUNC_START(blake2s_compress_avx512)
leaq SIGMA2(%rip),%rax
movb $0xa,%cl
.Lblake2s_compress_avx512_roundloop:
addq $0x40,%rax
vmovdqa -0x40(%rax),%ymm8
vmovdqa -0x20(%rax),%ymm9
vpmovzxbd (%rax),%ymm8
vpmovzxbd 0x8(%rax),%ymm9
addq $0x10,%rax
vpermi2d %ymm7,%ymm6,%ymm8
vpermi2d %ymm7,%ymm6,%ymm9
vmovdqa %ymm8,%ymm6