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libbb/sha1: shrink x86 hardware accelerated hashing (32-bit)

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function                                             old     new   delta
sha1_process_block64_shaNI                           517     511      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2022-02-08 15:23:26 +01:00
parent 71a1cccaad
commit eb52e7fa52
1 changed files with 5 additions and 6 deletions
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11
libbb/hash_md5_sha_x86-32_shaNI.S
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@ -35,11 +35,9 @@
.balign 8 # allow decoders to fetch at least 2 first insns
sha1_process_block64_shaNI:
subl $16, %esp
/* load initial hash values */
xor128 E0, E0
movu128 76(%eax), ABCD
xor128 E0, E0
pinsrd $3, 76+4*4(%eax), E0 # load to uppermost 32-bit word
shuf128_32 $0x1B, ABCD, ABCD # DCBA -> ABCD
@ -56,7 +54,7 @@ sha1_process_block64_shaNI:
/* Save hash values for addition after rounds */
movu128 E0, %xmm7
movu128 ABCD, (%esp)
/*movu128 ABCD, %xmm8 - NOPE, 32bit has no xmm8 */
/* Rounds 0-3 */
paddd MSG0, E0
@ -208,7 +206,9 @@ sha1_process_block64_shaNI:
/* Add current hash values with previously saved */
sha1nexte %xmm7, E0
movu128 (%esp), %xmm7
/*paddd %xmm8, ABCD - 32-bit mode has no xmm8 */
movu128 76(%eax), %xmm7 # recreate original ABCD
shuf128_32 $0x1B, %xmm7, %xmm7 # DCBA -> ABCD
paddd %xmm7, ABCD
/* Write hash values back in the correct order */
@ -216,7 +216,6 @@ sha1_process_block64_shaNI:
movu128 ABCD, 76(%eax)
extr128_32 $3, E0, 76+4*4(%eax)
addl $16, %esp
ret
.size sha1_process_block64_shaNI, .-sha1_process_block64_shaNI