- u32 len = start_len;
- machine_word_t v_word;
-
- if (UNALIGNED_ACCESS_IS_FAST) {
-
- if (likely(max_len - len >= 4 * WORDSIZE)) {
-
- #define COMPARE_WORD_STEP \
- v_word = load_word_unaligned(&matchptr[len]) ^ \
- load_word_unaligned(&strptr[len]); \
- if (v_word != 0) \
- goto word_differs; \
- len += WORDSIZE; \
-
- COMPARE_WORD_STEP
- COMPARE_WORD_STEP
- COMPARE_WORD_STEP
- COMPARE_WORD_STEP
- #undef COMPARE_WORD_STEP
- }
-
- while (len + WORDSIZE <= max_len) {
- v_word = load_word_unaligned(&matchptr[len]) ^
- load_word_unaligned(&strptr[len]);
- if (v_word != 0)
- goto word_differs;
- len += WORDSIZE;
+ while (UNALIGNED_ACCESS_IS_FAST && len + WORDSIZE <= max_len) {
+ machine_word_t v = load_word_unaligned(matchptr + len) ^
+ load_word_unaligned(strptr + len);
+ if (v != 0) {
+ if (CPU_IS_LITTLE_ENDIAN)
+ len += ffsw(v) >> 3;
+ else
+ len += (8 * WORDSIZE - 1 - flsw(v)) >> 3;
+ return len;