sha3: tweak choice of a fast code path for 64-bit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c
index 18e426079..7ae0b6385 100644
--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -1057,7 +1057,7 @@ static void KeccakF(uint64_t *state)
 
                 /* Chi */
                 for (y = 0; y <= 20; y += 5) {
-                        if (SHA3_SMALL) {
+                        if (SHA3_SMALL && !ARCH_IS_64BIT) {
                                 uint64_t BC[5];
                                 BC[0] = state[y + 0];
                                 BC[1] = state[y + 1];
@@ -1071,6 +1071,7 @@ static void KeccakF(uint64_t *state)
                                 }
                         } else {
                                 /* 32-bit x86: +50 bytes code, 10% faster */
+                                /* 64-bit x86: ~same code size, 30% faster */
                                 uint64_t BC0, BC1, BC2, BC3, BC4;
                                 BC0 = state[y + 0];
                                 BC1 = state[y + 1];