[git commit] libbb/sha1: optional i686 hardware accelerates hashing
Denys Vlasenko
vda.linux at googlemail.com
Fri Jan 7 00:32:13 UTC 2022
commit: https://git.busybox.net/busybox/commit/?id=a96ccbefe417aaac6a2ce59c788e01fc0f83902f
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master
function old new delta
sha1_process_block64_shaNI - 524 +524
sha1_begin 57 114 +57
.rodata 104353 104369 +16
static.shaNI - 1 +1
------------------------------------------------------------------------------
(add/remove: 4/0 grow/shrink: 2/0 up/down: 598/0) Total: 598 bytes
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
libbb/Kbuild.src | 1 +
libbb/hash_md5_sha.c | 21 +++-
libbb/hash_md5_sha_x86-32_shaNI.S | 231 ++++++++++++++++++++++++++++++++++++++
3 files changed, 252 insertions(+), 1 deletion(-)
diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src
index a3db02b6f..e8bb24f6d 100644
--- a/libbb/Kbuild.src
+++ b/libbb/Kbuild.src
@@ -58,6 +58,7 @@ lib-y += makedev.o
lib-y += hash_md5_sha.o
lib-y += hash_md5_sha_x86-64.o
lib-y += hash_md5_sha_x86-64_shaNI.o
+lib-y += hash_md5_sha_x86-32_shaNI.o
# Alternative (disabled) MD5 implementation
#lib-y += hash_md5prime.o
lib-y += messages.o
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c
index 4c6904b48..0b3af723a 100644
--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -1143,6 +1143,25 @@ static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
#endif /* NEED_SHA512 */
#if ENABLE_SHA1_HWACCEL
+# if defined(__GNUC__) && defined(__i386__)
+static void cpuid(unsigned *eax, unsigned *ebx, unsigned *ecx, unsigned *edx)
+{
+ asm (
+ " cpuid\n"
+ : "=a"(*eax), /* Output */
+ "=b"(*ebx),
+ "=c"(*ecx),
+ "=d"(*edx)
+ : "0"(*eax), /* Input */
+ "1"(*ebx),
+ "2"(*ecx),
+ "3"(*edx)
+ /* No clobbered registers */
+ );
+}
+struct ASM_expects_76_shaNI { char t[1 - 2*(offsetof(sha1_ctx_t, hash) != 76)]; };
+void FAST_FUNC sha1_process_block64_shaNI(sha1_ctx_t *ctx);
+# endif
# if defined(__GNUC__) && defined(__x86_64__)
static void cpuid(unsigned *eax, unsigned *ebx, unsigned *ecx, unsigned *edx)
{
@@ -1174,7 +1193,7 @@ void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
ctx->total64 = 0;
ctx->process_block = sha1_process_block64;
#if ENABLE_SHA1_HWACCEL
-# if defined(__GNUC__) && defined(__x86_64__)
+# if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
{
static smallint shaNI;
if (!shaNI) {
diff --git a/libbb/hash_md5_sha_x86-32_shaNI.S b/libbb/hash_md5_sha_x86-32_shaNI.S
new file mode 100644
index 000000000..7202c7673
--- /dev/null
+++ b/libbb/hash_md5_sha_x86-32_shaNI.S
@@ -0,0 +1,231 @@
+#if ENABLE_SHA1_HWACCEL && defined(__GNUC__) && defined(__i386__)
+/* The code is adapted from Linux kernel's source */
+
+// We use shorter insns, even though they are for "wrong"
+// data type (fp, not int).
+// For Intel, there is no penalty for doing it at all
+// (CPUs which do have such penalty do not support SHA1 insns).
+// For AMD, the penalty is one extra cycle
+// (allegedly: I failed to find measurable difference).
+
+//#define mova128 movdqa
+#define mova128 movaps
+//#define movu128 movdqu
+#define movu128 movups
+//#define xor128 pxor
+#define xor128 xorps
+//#define shuf128_32 pshufd
+#define shuf128_32 shufps
+
+#define extr128_32 pextrd
+//#define extr128_32 extractps # not shorter
+
+ .section .text.sha1_process_block64_shaNI,"ax", at progbits
+ .globl sha1_process_block64_shaNI
+ .hidden sha1_process_block64_shaNI
+ .type sha1_process_block64_shaNI, @function
+
+#define ABCD %xmm0
+#define E0 %xmm1 /* Need two E's b/c they ping pong */
+#define E1 %xmm2
+#define MSG0 %xmm3
+#define MSG1 %xmm4
+#define MSG2 %xmm5
+#define MSG3 %xmm6
+#define SHUF_MASK %xmm7
+
+ .balign 8 # allow decoders to fetch at least 2 first insns
+sha1_process_block64_shaNI:
+ pushl %ebp
+ movl %esp, %ebp
+ subl $32, %esp
+ andl $~0xF, %esp # paddd needs aligned memory operand
+
+ /* load initial hash values */
+ xor128 E0, E0
+ movu128 76(%eax), ABCD
+ pinsrd $3, 76+4*4(%eax), E0 # load to upper 32-bit word
+ shuf128_32 $0x1B, ABCD, ABCD # 00011011: bswap
+
+ mova128 PSHUFFLE_BYTE_FLIP_MASK, SHUF_MASK
+
+ /* Save hash values for addition after rounds */
+ movu128 E0, 16(%esp)
+ movu128 ABCD, (%esp)
+
+ /* Rounds 0-3 */
+ movu128 0*16(%eax), MSG0
+ pshufb SHUF_MASK, MSG0
+ paddd MSG0, E0
+ mova128 ABCD, E1
+ sha1rnds4 $0, E0, ABCD
+
+ /* Rounds 4-7 */
+ movu128 1*16(%eax), MSG1
+ pshufb SHUF_MASK, MSG1
+ sha1nexte MSG1, E1
+ mova128 ABCD, E0
+ sha1rnds4 $0, E1, ABCD
+ sha1msg1 MSG1, MSG0
+
+ /* Rounds 8-11 */
+ movu128 2*16(%eax), MSG2
+ pshufb SHUF_MASK, MSG2
+ sha1nexte MSG2, E0
+ mova128 ABCD, E1
+ sha1rnds4 $0, E0, ABCD
+ sha1msg1 MSG2, MSG1
+ xor128 MSG2, MSG0
+
+ /* Rounds 12-15 */
+ movu128 3*16(%eax), MSG3
+ pshufb SHUF_MASK, MSG3
+ sha1nexte MSG3, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG3, MSG0
+ sha1rnds4 $0, E1, ABCD
+ sha1msg1 MSG3, MSG2
+ xor128 MSG3, MSG1
+
+ /* Rounds 16-19 */
+ sha1nexte MSG0, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG0, MSG1
+ sha1rnds4 $0, E0, ABCD
+ sha1msg1 MSG0, MSG3
+ xor128 MSG0, MSG2
+
+ /* Rounds 20-23 */
+ sha1nexte MSG1, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG1, MSG2
+ sha1rnds4 $1, E1, ABCD
+ sha1msg1 MSG1, MSG0
+ xor128 MSG1, MSG3
+
+ /* Rounds 24-27 */
+ sha1nexte MSG2, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG2, MSG3
+ sha1rnds4 $1, E0, ABCD
+ sha1msg1 MSG2, MSG1
+ xor128 MSG2, MSG0
+
+ /* Rounds 28-31 */
+ sha1nexte MSG3, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG3, MSG0
+ sha1rnds4 $1, E1, ABCD
+ sha1msg1 MSG3, MSG2
+ xor128 MSG3, MSG1
+
+ /* Rounds 32-35 */
+ sha1nexte MSG0, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG0, MSG1
+ sha1rnds4 $1, E0, ABCD
+ sha1msg1 MSG0, MSG3
+ xor128 MSG0, MSG2
+
+ /* Rounds 36-39 */
+ sha1nexte MSG1, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG1, MSG2
+ sha1rnds4 $1, E1, ABCD
+ sha1msg1 MSG1, MSG0
+ xor128 MSG1, MSG3
+
+ /* Rounds 40-43 */
+ sha1nexte MSG2, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG2, MSG3
+ sha1rnds4 $2, E0, ABCD
+ sha1msg1 MSG2, MSG1
+ xor128 MSG2, MSG0
+
+ /* Rounds 44-47 */
+ sha1nexte MSG3, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG3, MSG0
+ sha1rnds4 $2, E1, ABCD
+ sha1msg1 MSG3, MSG2
+ xor128 MSG3, MSG1
+
+ /* Rounds 48-51 */
+ sha1nexte MSG0, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG0, MSG1
+ sha1rnds4 $2, E0, ABCD
+ sha1msg1 MSG0, MSG3
+ xor128 MSG0, MSG2
+
+ /* Rounds 52-55 */
+ sha1nexte MSG1, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG1, MSG2
+ sha1rnds4 $2, E1, ABCD
+ sha1msg1 MSG1, MSG0
+ xor128 MSG1, MSG3
+
+ /* Rounds 56-59 */
+ sha1nexte MSG2, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG2, MSG3
+ sha1rnds4 $2, E0, ABCD
+ sha1msg1 MSG2, MSG1
+ xor128 MSG2, MSG0
+
+ /* Rounds 60-63 */
+ sha1nexte MSG3, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG3, MSG0
+ sha1rnds4 $3, E1, ABCD
+ sha1msg1 MSG3, MSG2
+ xor128 MSG3, MSG1
+
+ /* Rounds 64-67 */
+ sha1nexte MSG0, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG0, MSG1
+ sha1rnds4 $3, E0, ABCD
+ sha1msg1 MSG0, MSG3
+ xor128 MSG0, MSG2
+
+ /* Rounds 68-71 */
+ sha1nexte MSG1, E1
+ mova128 ABCD, E0
+ sha1msg2 MSG1, MSG2
+ sha1rnds4 $3, E1, ABCD
+ xor128 MSG1, MSG3
+
+ /* Rounds 72-75 */
+ sha1nexte MSG2, E0
+ mova128 ABCD, E1
+ sha1msg2 MSG2, MSG3
+ sha1rnds4 $3, E0, ABCD
+
+ /* Rounds 76-79 */
+ sha1nexte MSG3, E1
+ mova128 ABCD, E0
+ sha1rnds4 $3, E1, ABCD
+
+ /* Add current hash values with previously saved */
+ sha1nexte 16(%esp), E0
+ paddd (%esp), ABCD
+
+ /* Write hash values back in the correct order */
+ shuf128_32 $0x1B, ABCD, ABCD
+ movu128 ABCD, 76(%eax)
+ extr128_32 $3, E0, 76+4*4(%eax)
+
+ movl %ebp, %esp
+ popl %ebp
+ ret
+ .size sha1_process_block64_shaNI, .-sha1_process_block64_shaNI
+
+.section .rodata.cst16.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 16
+.align 16
+PSHUFFLE_BYTE_FLIP_MASK:
+ .octa 0x000102030405060708090a0b0c0d0e0f
+
+#endif
More information about the busybox-cvs
mailing list