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

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

diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c
index 18e4260..7ae0b63 100644 (file)
--- 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];