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| author | Denys Vlasenko | 2022-02-09 01:42:49 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2022-02-09 01:42:49 +0100 |
| commit | 11bcea7ac0ac4b2156c1b2d53f926d789b9792b4 (patch) | |
| tree | a9fb00915788a924269722c0afa186d4fac5f610 /libbb/hash_md5_sha256_x86-64_shaNI.S | |
| parent | 461a994b09c5022b93bccccf903b39438d61bbf1 (diff) | |
| download | busybox-11bcea7ac0ac4b2156c1b2d53f926d789b9792b4.zip busybox-11bcea7ac0ac4b2156c1b2d53f926d789b9792b4.tar.gz | |
libbb/sha256: code shrink in 64-bit x86
function old new delta
sha256_process_block64_shaNI 701 680 -21
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/hash_md5_sha256_x86-64_shaNI.S')
| -rw-r--r-- | libbb/hash_md5_sha256_x86-64_shaNI.S | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/libbb/hash_md5_sha256_x86-64_shaNI.S b/libbb/hash_md5_sha256_x86-64_shaNI.S index b5c950a..bc063b9 100644 --- a/libbb/hash_md5_sha256_x86-64_shaNI.S +++ b/libbb/hash_md5_sha256_x86-64_shaNI.S @@ -37,16 +37,18 @@ #define ABEF_SAVE %xmm9 #define CDGH_SAVE %xmm10 +#define SHUF(a,b,c,d) $(a+(b<<2)+(c<<4)+(d<<6)) + .balign 8 # allow decoders to fetch at least 2 first insns sha256_process_block64_shaNI: - movu128 80+0*16(%rdi), STATE0 - movu128 80+1*16(%rdi), STATE1 - shuf128_32 $0xB1, STATE0, STATE0 /* CDAB */ - shuf128_32 $0x1B, STATE1, STATE1 /* EFGH */ + movu128 80+0*16(%rdi), STATE1 /* DCBA (msb-to-lsb: 3,2,1,0) */ + movu128 80+1*16(%rdi), STATE0 /* HGFE */ +/* shufps takes dwords 0,1 from *2nd* operand, and dwords 2,3 from 1st one */ mova128 STATE0, XMMTMP - palignr $8, STATE1, STATE0 /* ABEF */ - pblendw $0xF0, XMMTMP, STATE1 /* CDGH */ + shufps SHUF(1,0,1,0), STATE1, STATE0 /* ABEF */ + shufps SHUF(3,2,3,2), STATE1, XMMTMP /* CDGH */ + mova128 XMMTMP, STATE1 /* XMMTMP holds flip mask from here... */ mova128 PSHUFFLE_BSWAP32_FLIP_MASK(%rip), XMMTMP @@ -242,14 +244,15 @@ sha256_process_block64_shaNI: paddd CDGH_SAVE, STATE1 /* Write hash values back in the correct order */ - shuf128_32 $0x1B, STATE0, STATE0 /* FEBA */ - shuf128_32 $0xB1, STATE1, STATE1 /* DCHG */ + /* STATE0: ABEF (msb-to-lsb: 3,2,1,0) */ + /* STATE1: CDGH */ mova128 STATE0, XMMTMP - pblendw $0xF0, STATE1, STATE0 /* DCBA */ - palignr $8, XMMTMP, STATE1 /* HGFE */ +/* shufps takes dwords 0,1 from *2nd* operand, and dwords 2,3 from 1st one */ + shufps SHUF(3,2,3,2), STATE1, STATE0 /* DCBA */ + shufps SHUF(1,0,1,0), STATE1, XMMTMP /* HGFE */ movu128 STATE0, 80+0*16(%rdi) - movu128 STATE1, 80+1*16(%rdi) + movu128 XMMTMP, 80+1*16(%rdi) ret .size sha256_process_block64_shaNI, .-sha256_process_block64_shaNI |