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 64bit-unaligned.
If it indeed can be, replace:
((u64*)(input))[I] -> get_unaligned( ((u64*)(input))+I )
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/crypto/sha512.c | 19 ++-----------------
1 files changed, 2 insertions(+), 17 deletions(-)
diff -puN crypto/sha512.c~small-sha512-cleanup crypto/sha512.c
--- 25/crypto/sha512.c~small-sha512-cleanup 2004-10-01 21:20:42.100900176 -0700
+++ 25-akpm/crypto/sha512.c 2004-10-01 21:20:42.104899568 -0700
@@ -104,27 +104,12 @@ const u64 sha512_K[80] = {
static inline void LOAD_OP(int I, u64 *W, const u8 *input)
{
- u64 t1 = input[(8*I) ] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+1] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+2] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+3] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+4] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+5] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+6] & 0xff;
- t1 <<= 8;
- t1 |= input[(8*I)+7] & 0xff;
- W[I] = t1;
+ W[I] = __be64_to_cpu( ((u64*)(input))[I] );
}
static inline void BLEND_OP(int I, u64 *W)
{
- W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
+ W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
}
static void
_