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Koen Kooi
ebbeb55561
Also add script used to generate patches and SRC_URI Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
43 lines
1.4 KiB
Diff
43 lines
1.4 KiB
Diff
From 1671634439eee95d8d54c7cd18e6ff1db20fc87c Mon Sep 17 00:00:00 2001
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From: Herbert Xu <herbert@gondor.apana.org.au>
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Date: Thu, 26 Jan 2012 15:03:16 +1100
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Subject: [PATCH 20/30] crypto: sha512 - Use binary and instead of modulus
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commit 58d7d18b5268febb8b1391c6dffc8e2aaa751fcd upstream.
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The previous patch used the modulus operator over a power of 2
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unnecessarily which may produce suboptimal binary code. This
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patch changes changes them to binary ands instead.
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Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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crypto/sha512_generic.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c
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index 88f160b..3edebfd 100644
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--- a/crypto/sha512_generic.c
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+++ b/crypto/sha512_generic.c
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@@ -78,7 +78,7 @@ static inline void LOAD_OP(int I, u64 *W, const u8 *input)
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static inline void BLEND_OP(int I, u64 *W)
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{
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- W[I % 16] += s1(W[(I-2) % 16]) + W[(I-7) % 16] + s0(W[(I-15) % 16]);
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+ W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
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}
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static void
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@@ -105,7 +105,7 @@ sha512_transform(u64 *state, const u8 *input)
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#define SHA512_16_79(i, a, b, c, d, e, f, g, h) \
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BLEND_OP(i, W); \
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- t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i)%16]; \
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+ t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i)&15]; \
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t2 = e0(a) + Maj(a, b, c); \
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d += t1; \
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h = t1 + t2
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--
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1.7.9.4
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