From: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Looks like open-coded be_to_cpu. GCC produces rather poor code for this.
be_to_cpu produces asm()s which are ~4 times shorter.
Compile-tested only.
I am not sure whether input can be 32bit-unaligned.
If it indeed can be, replace:
((u32*)(input))[I] -> get_unaligned( ((u32*)(input))+I )
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/crypto/sha256.c | 10 +---------
1 files changed, 1 insertion(+), 9 deletions(-)
diff -puN crypto/sha256.c~small-sha256-cleanup crypto/sha256.c
--- 25/crypto/sha256.c~small-sha256-cleanup 2004-10-01 21:20:39.113354352 -0700
+++ 25-akpm/crypto/sha256.c 2004-10-01 21:20:39.117353744 -0700
@@ -63,15 +63,7 @@ static inline u32 RORu32(u32 x, u32 y)
static inline void LOAD_OP(int I, u32 *W, const u8 *input)
{
- u32 t1 = input[(4 * I)] & 0xff;
-
- t1 <<= 8;
- t1 |= input[(4 * I) + 1] & 0xff;
- t1 <<= 8;
- t1 |= input[(4 * I) + 2] & 0xff;
- t1 <<= 8;
- t1 |= input[(4 * I) + 3] & 0xff;
- W[I] = t1;
+ W[I] = __be32_to_cpu( ((u32*)(input))[I] );
}
static inline void BLEND_OP(int I, u32 *W)
_