4d4f1f209 — BusyBox

Subject

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

No binary (build failed)

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

(log yok)

libbb/Config.src+1 -1

@@ -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

libbb/hash_md5_sha.c+22 -20

@@ -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\