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libbb/sha1: x86_64 version: bswap in 64-bit chunks

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function                                             old     new   delta
sha1_process_block64                                3562    3570      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2022-01-01 15:42:15 +01:00
parent d643010fee
commit 4d4f1f2096
2 changed files with 23 additions and 21 deletions
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2
libbb/Config.src
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@@ -59,7 +59,7 @@ config SHA1_SMALL
Trade binary size versus speed for the sha1 algorithm.
throughput MB/s size of sha1_process_block64
value 486 x86-64 486 x86-64
0 367 367 3657 3562
0 367 367 3657 3570
1 224 229 654 732
2,3 200 195 358 380

42
libbb/hash_md5_sha.c
View File

@@ -867,27 +867,29 @@ static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx UNUSED_PARAM)
.endif \n\
.endm \n\
\n\
movl 4*8(%rdi), %r8d \n\
bswap %r8d \n\
movl 4*9(%rdi), %r9d \n\
bswap %r9d \n\
movl 4*10(%rdi), %r10d \n\
bswap %r10d \n\
movl 4*11(%rdi), %r11d \n\
bswap %r11d \n\
movl 4*12(%rdi), %r12d \n\
bswap %r12d \n\
movl 4*13(%rdi), %r13d \n\
bswap %r13d \n\
movl 4*14(%rdi), %r14d \n\
bswap %r14d \n\
movl 4*15(%rdi), %r15d \n\
bswap %r15d \n\
movl $7, %eax \n\
movq 4*8(%rdi), %r8 \n\
bswap %r8 \n\
movl %r8d, %r9d \n\
shrq $32, %r8 \n\
movq 4*10(%rdi), %r10 \n\
bswap %r10 \n\
movl %r10d, %r11d \n\
shrq $32, %r10 \n\
movq 4*12(%rdi), %r12 \n\
bswap %r12 \n\
movl %r12d, %r13d \n\
shrq $32, %r12 \n\
movq 4*14(%rdi), %r14 \n\
bswap %r14 \n\
movl %r14d, %r15d \n\
shrq $32, %r14 \n\
\n\
movl $3, %eax \n\
1: \n\
movl (%rdi,%rax,4), %esi \n\
bswap %esi \n\
movl %esi, -32(%rsp,%rax,4) \n\
movq (%rdi,%rax,8), %rsi \n\
bswap %rsi \n\
rolq $32, %rsi \n\
movq %rsi, -32(%rsp,%rax,8) \n\
decl %eax \n\
jns 1b \n\
movl 80(%rdi), %eax # a = ctx->hash[0] \n\