[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>
diff --git a/Makefile b/Makefile
index f83c495..6d73a4d 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,9 @@
# Define PPC_SHA1 environment variable when running make to make use of
# a bundled SHA1 routine optimized for PowerPC.
#
+# Define ARM_SHA1 environment variable when running make to make use of
+# a bundled SHA1 routine optimized for ARM.
+#
# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
#
# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
@@ -162,6 +165,9 @@
NEEDS_NSL = YesPlease
PLATFORM_DEFINES += -D__EXTENSIONS__
endif
+ifneq (,$(findstring arm,$(shell uname -m)))
+ ARM_SHA1 = YesPlease
+endif
ifndef SHELL_PATH
SHELL_PATH = /bin/sh
@@ -191,18 +197,6 @@
else
LIB_4_ICONV =
endif
-ifdef MOZILLA_SHA1
- SHA1_HEADER = "mozilla-sha1/sha1.h"
- LIB_OBJS += mozilla-sha1/sha1.o
-else
- ifdef PPC_SHA1
- SHA1_HEADER = "ppc/sha1.h"
- LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
- else
- SHA1_HEADER = <openssl/sha.h>
- LIBS += $(LIB_4_CRYPTO)
- endif
-endif
ifdef NEEDS_SOCKET
LIBS += -lsocket
SIMPLE_LIB += -lsocket
@@ -216,6 +210,24 @@
LIB_OBJS += compat/strcasestr.o
endif
+ifdef PPC_SHA1
+ SHA1_HEADER = "ppc/sha1.h"
+ LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
+else
+ifdef ARM_SHA1
+ SHA1_HEADER = "arm/sha1.h"
+ LIB_OBJS += arm/sha1.o arm/sha1_arm.o
+else
+ifdef MOZILLA_SHA1
+ SHA1_HEADER = "mozilla-sha1/sha1.h"
+ LIB_OBJS += mozilla-sha1/sha1.o
+else
+ SHA1_HEADER = <openssl/sha.h>
+ LIBS += $(LIB_4_CRYPTO)
+endif
+endif
+endif
+
DEFINES += '-DSHA1_HEADER=$(SHA1_HEADER)'
SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
