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| author | Denys Vlasenko | 2022-01-08 01:25:23 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2022-01-08 01:25:23 +0100 |
| commit | e7ff29402d23e1c265769dbe809cf2d329a75ec2 (patch) | |
| tree | 2b8a1ca262efa3de73efb03eef8e75bd112238ed /libbb | |
| parent | 805ececa615606c02a5ca8f37f84dbbc527221eb (diff) | |
| download | busybox-e7ff29402d23e1c265769dbe809cf2d329a75ec2.zip busybox-e7ff29402d23e1c265769dbe809cf2d329a75ec2.tar.gz | |
libbb/sha1: simplify cpuid code
function old new delta
sha1_begin 107 106 -1
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/hash_md5_sha.c | 42 |
1 files changed, 10 insertions, 32 deletions
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index 0b3af72..a23db51 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -1143,43 +1143,21 @@ static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx) #endif /* NEED_SHA512 */ #if ENABLE_SHA1_HWACCEL -# if defined(__GNUC__) && defined(__i386__) +# if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) 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 */ + asm ("cpuid" + : "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx) + : "0"(*eax), "1"(*ebx), "2"(*ecx), "3"(*edx) ); } -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) -{ - asm ( - "cpuid\n" - : "=a"(*eax), /* Output */ - "=b"(*ebx), - "=c"(*ecx), - "=d"(*edx) - : "0"(*eax), /* Input */ - "1"(*ebx), - "2"(*ecx), - "3"(*edx) - /* No clobbered registers */ - ); -} +# if defined(__i386__) +struct ASM_expects_76_shaNI { char t[1 - 2*(offsetof(sha1_ctx_t, hash) != 76)]; }; +# endif +# if defined(__x86_64__) struct ASM_expects_80_shaNI { char t[1 - 2*(offsetof(sha1_ctx_t, hash) != 80)]; }; -void FAST_FUNC sha1_process_block64_shaNI(sha1_ctx_t *ctx); +# endif # endif #endif @@ -1199,7 +1177,7 @@ void FAST_FUNC sha1_begin(sha1_ctx_t *ctx) if (!shaNI) { unsigned eax = 7, ebx = ebx, ecx = 0, edx = edx; cpuid(&eax, &ebx, &ecx, &edx); - shaNI = ((ebx >> 28) & 2) - 1; + shaNI = ((ebx >> 29) << 1) - 1; } if (shaNI > 0) ctx->process_block = sha1_process_block64_shaNI; |