diff options
Diffstat (limited to 'libbb/hash_md5_sha.c')
| -rw-r--r-- | libbb/hash_md5_sha.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index ee19c1c..4c6904b 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -699,7 +699,7 @@ static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx UNUSED_PARAM) /* in hash_md5_sha_x86-64.S */ struct ASM_expects_80 { char t[1 - 2*(offsetof(sha1_ctx_t, hash) != 80)]; }; -void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx UNUSED_PARAM); +void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx); # else /* Fast, fully-unrolled SHA1. +3800 bytes of code on x86. @@ -1142,6 +1142,28 @@ static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx) } #endif /* NEED_SHA512 */ +#if ENABLE_SHA1_HWACCEL +# 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 */ + ); +} +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 + void FAST_FUNC sha1_begin(sha1_ctx_t *ctx) { ctx->hash[0] = 0x67452301; @@ -1151,6 +1173,20 @@ void FAST_FUNC sha1_begin(sha1_ctx_t *ctx) ctx->hash[4] = 0xc3d2e1f0; ctx->total64 = 0; ctx->process_block = sha1_process_block64; +#if ENABLE_SHA1_HWACCEL +# if defined(__GNUC__) && defined(__x86_64__) + { + static smallint shaNI; + if (!shaNI) { + unsigned eax = 7, ebx = ebx, ecx = 0, edx = edx; + cpuid(&eax, &ebx, &ecx, &edx); + shaNI = ((ebx >> 28) & 2) - 1; + } + if (shaNI > 0) + ctx->process_block = sha1_process_block64_shaNI; + } +# endif +#endif } static const uint32_t init256[] ALIGN4 = { |