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| author | dmitry dulesov <dmitry.dulesov@gmail.com> | 2020-01-30 05:49:50 +0300 |
|---|---|---|
| committer | Dmitry Belyavskiy <beldmit@users.noreply.github.com> | 2020-02-02 21:05:29 +0300 |
| commit | 31138d02d9c3698c039154b3078c16f205e25902 (patch) | |
| tree | bf08bc47a34b7ce92b4e813644f1e35aeaf2d765 /gosthash2012.c | |
| parent | 9ff7d05ba8018b679c2b40e12b2ecfe51dc4127c (diff) | |
| download | gost-engine-31138d02d9c3698c039154b3078c16f205e25902.zip gost-engine-31138d02d9c3698c039154b3078c16f205e25902.tar.gz gost-engine-31138d02d9c3698c039154b3078c16f205e25902.tar.bz2 | |
gosthash2012: Optimize out temporary `buf' from `stage3'
On-stack `buf' is replaced by manipulation directly on `CTX->buffer'.
Committed-by: Vitaly Chikunov <vt@altlinux.org>
Diffstat (limited to 'gosthash2012.c')
| -rw-r--r-- | gosthash2012.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/gosthash2012.c b/gosthash2012.c index b844ab3..ddd35fa 100644 --- a/gosthash2012.c +++ b/gosthash2012.c @@ -158,28 +158,19 @@ static INLINE void stage2(gost2012_hash_ctx * CTX, const union uint512_u *data) static INLINE void stage3(gost2012_hash_ctx * CTX) { - ALIGN(16) union uint512_u buf; - - memset(&buf, 0x00, sizeof buf); - memcpy(&buf, &(CTX->buffer), CTX->bufsize); - memcpy(&(CTX->buffer), &buf, sizeof(uint512_u)); + pad(CTX); + g(&(CTX->h), &(CTX->N), &(CTX->buffer)); + add512(&(CTX->Sigma), &CTX->buffer); - memset(&buf, 0x00, sizeof buf); + memset(&(CTX->buffer.B[0]), 0, sizeof(uint512_u)); #ifndef __GOST3411_BIG_ENDIAN__ - buf.QWORD[0] = CTX->bufsize << 3; + CTX->buffer.QWORD[0] = CTX->bufsize << 3; #else - buf.QWORD[0] = BSWAP64(CTX->bufsize << 3); + CTX->buffer.QWORD[0] = BSWAP64(CTX->bufsize << 3); #endif - - pad(CTX); - - g(&(CTX->h), &(CTX->N), &(CTX->buffer)); - - add512(&(CTX->N), &buf); - add512(&(CTX->Sigma), &CTX->buffer); + add512(&(CTX->N), &(CTX->buffer)); g(&(CTX->h), &buffer0, &(CTX->N)); - g(&(CTX->h), &buffer0, &(CTX->Sigma)); } |