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libbb: cose shrink in sha1

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function                                             old     new   delta
sha1_process_block64                                 356     342     -14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-12-28 09:05:12 +01:00
parent 44075929a8
commit f1d06462e8
1 changed files with 2 additions and 5 deletions
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7
libbb/hash_md5_sha.c
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@ -523,9 +523,6 @@ static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
work = (work & b) ^ d; work = (work & b) ^ d;
if (j <= 3) if (j <= 3)
goto ge16; goto ge16;
/* Used to do SWAP_BE32 here, but this
* requires ctx (see comment above) */
work += W[cnt];
} else { } else {
if (i == 2) if (i == 2)
work = ((b | c) & d) | (b & c); work = ((b | c) & d) | (b & c);
@ -533,14 +530,14 @@ static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
work ^= b; work ^= b;
ge16: ge16:
W[cnt] = W[cnt+16] = rotl32(W[cnt+13] ^ W[cnt+8] ^ W[cnt+2] ^ W[cnt], 1); W[cnt] = W[cnt+16] = rotl32(W[cnt+13] ^ W[cnt+8] ^ W[cnt+2] ^ W[cnt], 1);
work += W[cnt];
} }
work += W[cnt];
work += e + rotl32(a, 5) + rconsts[i]; work += e + rotl32(a, 5) + rconsts[i];
/* Rotate by one for next time */ /* Rotate by one for next time */
e = d; e = d;
d = c; d = c;
c = /* b = */ rotl32(b, 30); c = rotl32(b, 30);
b = a; b = a;
a = work; a = work;
cnt = (cnt + 1) & 15; cnt = (cnt + 1) & 15;