Provide a replacement assembly implementation for SHA-1 on amd64.

As already done for SHA-256 and SHA-512, replace the perlasm generated
SHA-1 assembly implementation with one that is actually readable. Call the
assembly implementation from a C wrapper that can, in the future, dispatch
to alternate implementations. On a modern CPU the performance is around
5% faster than the base implementation generated by sha1-x86_64.pl, however
it is around 15% slower than the excessively complex SSSE2/AVX version that
is also generated by the same script (a SHA-NI version will greatly
outperform this and is much cleaner/simpler).

ok tb@

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libcrypto/arch/amd64/Makefile.inc b/src/lib/libcrypto/arch/amd64/Makefile.inc
index fe22385633..33c7dbba26 100644
--- a/src/lib/libcrypto/arch/amd64/Makefile.inc
+++ b/src/lib/libcrypto/arch/amd64/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.33 2024/11/16 15:31:36 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.34 2024/12/04 13:13:33 jsing Exp $
 
 # amd64-specific libcrypto build rules
 
@@ -49,7 +49,8 @@ SSLASM+= rc4 rc4-x86_64
 # ripemd
 # sha
 CFLAGS+= -DSHA1_ASM
-SSLASM+= sha sha1-x86_64
+SRCS+= sha1_amd64.c
+SRCS+= sha1_amd64_generic.S
 CFLAGS+= -DSHA256_ASM
 SRCS+= sha256_amd64.c
 SRCS+= sha256_amd64_generic.S