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git/arm/sha1.h
Nicolas Pitre 7c6ef2f214 [PATCH] ARM optimized SHA1 implementation
This is my ARM assembly SHA1 implementation for GIT. It is approximately
50% faster than the generic C version. On an XScale processor running at
400MHz:

	generic C version:	9.8 MB/s
	my version:		14.5 MB/s

It's not that I expect a lot of big GIT users on ARM, but I stillknow
about one important ARM user that might benefit from it, and writing
that code was fun.

I also reworked the makefile a bit so any optimized SHA1 implementations
is used regardless of whether NO_OPENSSL is defined or not.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-09-20 18:10:00 -07:00

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402 B
C

/*
* SHA-1 implementation optimized for ARM
*
* Copyright: (C) 2005 by Nicolas Pitre <nico@cam.org>
* Created: September 17, 2005
*/
#include <stdint.h>
typedef struct sha_context {
uint64_t len;
uint32_t hash[5];
unsigned char buffer[64];
} SHA_CTX;
void SHA1_Init(SHA_CTX *c);
void SHA1_Update(SHA_CTX *c, const void *p, unsigned long n);
void SHA1_Final(unsigned char *hash, SHA_CTX *c);