- u32 len = start_len;
-
-#if HAVE_FAST_LZ_EXTEND
-
- while (len + sizeof(unsigned long) <= max_len) {
- unsigned long x;
-
- x = *(const unsigned long *)&matchptr[len] ^
- *(const unsigned long *)&strptr[len];
- if (x != 0)
- return len + (__builtin_ctzl(x) >> 3);
- len += sizeof(unsigned long);
- }
-
- if (sizeof(unsigned int) < sizeof(unsigned long) &&
- len + sizeof(unsigned int) <= max_len)
- {
- unsigned int x;
-
- x = *(const unsigned int *)&matchptr[len] ^
- *(const unsigned int *)&strptr[len];
- if (x != 0)
- return len + (__builtin_ctz(x) >> 3);
- len += sizeof(unsigned int);
- }
-
- if (sizeof(unsigned int) == 4) {
- if (len < max_len && matchptr[len] == strptr[len]) {
- len++;
- if (len < max_len && matchptr[len] == strptr[len]) {
- len++;
- if (len < max_len && matchptr[len] == strptr[len]) {
- len++;
- }
- }
+ 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;