eb8d5f3b8
Denys Vlasenko
2022-02-08
Subject
libbb/sha1: shrink x86 hardware accelerated hashing (32-bit)
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libbb/hash_md5_sha_x86-32_shaNI.S+4 -5
| @@ -53,8 +53,8 @@ sha1_process_block64_shaNI: | |
| pshufb %xmm7, MSG3 | |
| /* Save hash values for addition after rounds */ | |
| - | movu128 E0, %xmm7 |
| - | /*movu128 ABCD, %xmm8 - NOPE, 32bit has no xmm8 */ |
| + | mova128 E0, %xmm7 |
| + | /*mova128 ABCD, %xmm8 - NOPE, 32bit has no xmm8 */ |
| /* Rounds 0-3 */ | |
| paddd MSG0, E0 | |
| @@ -207,12 +207,11 @@ sha1_process_block64_shaNI: | |
| /* Add current hash values with previously saved */ | |
| sha1nexte %xmm7, E0 | |
| /*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 |
| + | movu128 76(%eax), %xmm7 # get original ABCD (not shuffled)... |
| /* Write hash values back in the correct order */ | |
| shuf128_32 $0x1B, ABCD, ABCD | |
| + | paddd %xmm7, ABCD # ...add it to final ABCD |
| movu128 ABCD, 76(%eax) | |
| extr128_32 $3, E0, 76+4*4(%eax) | |
libbb/hash_md5_sha_x86-64_shaNI.S+1 -2
| @@ -36,9 +36,8 @@ | |
| .balign 8 # allow decoders to fetch at least 2 first insns | |
| sha1_process_block64_shaNI: | |
| /* load initial hash values */ | |
| - | |
| - | xor128 E0, E0 |
| movu128 80(%rdi), ABCD | |
| + | xor128 E0, E0 |
| pinsrd $3, 80+4*4(%rdi), E0 # load to uppermost 32-bit word | |
| shuf128_32 $0x1B, ABCD, ABCD # DCBA -> ABCD | |