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libbb/sha: fix sha-NI instruction detection

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2023-03-29 15:17:00 +02:00
parent c0bb90e2fe
commit 8d198665a0
1 changed files with 2 additions and 2 deletions
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4
libbb/hash_md5_sha.c
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@ -1178,7 +1178,7 @@ 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 >> 29) << 1) - 1;
shaNI = ((ebx >> 28) & 2) - 1; /* bit 29 -> 1 or -1 */
}
if (shaNI > 0)
ctx->process_block = sha1_process_block64_shaNI;
@ -1232,7 +1232,7 @@ void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
if (!shaNI) {
unsigned eax = 7, ebx = ebx, ecx = 0, edx = edx;
cpuid(&eax, &ebx, &ecx, &edx);
shaNI = ((ebx >> 29) << 1) - 1;
shaNI = ((ebx >> 28) & 2) - 1; /* bit 29 -> 1 or -1 */
}
if (shaNI > 0)
ctx->process_block = sha256_process_block64_shaNI;