diff options
Diffstat (limited to 'zahl-internals.h')
| -rw-r--r-- | zahl-internals.h | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/zahl-internals.h b/zahl-internals.h index e9232dd..fc6768a 100644 --- a/zahl-internals.h +++ b/zahl-internals.h @@ -109,18 +109,62 @@ struct zahl { void libzahl_realloc(struct zahl *, size_t); -ZAHL_O2 ZAHL_INLINE void +ZAHL_INLINE void libzahl_memcpy(register zahl_char_t *restrict d, register const zahl_char_t *restrict s, size_t n) { size_t i; - for (i = 0; i < n; i++) - d[i] = s[i]; + if (n <= 4) { + if (n >= 1) + d[0] = s[0]; + if (n >= 2) + d[1] = s[1]; + if (n >= 3) + d[2] = s[2]; + if (n >= 4) + d[3] = s[3]; + } else { + for (i = 0; (i += 4) <= n;) { + d[i - 1] = s[i - 1]; + d[i - 2] = s[i - 2]; + d[i - 3] = s[i - 3]; + d[i - 4] = s[i - 4]; + } + if (i > n) { + i -= 4; + if (i < n) + d[i] = s[i], i++; + if (i < n) + d[i] = s[i], i++; + if (i < n) + d[i] = s[i], i++; + if (i < n) + d[i] = s[i], i++; + } + } } -ZAHL_O2 ZAHL_INLINE void +ZAHL_INLINE void libzahl_memset(register zahl_char_t *a, register zahl_char_t v, size_t n) { size_t i; - for (i = 0; i < n; i++) - a[i] = v; + if (n <= 4) { + if (n >= 1) + a[0] = v; + if (n >= 2) + a[1] = v; + if (n >= 3) + a[2] = v; + if (n >= 4) + a[3] = v; + } else { + for (i = 0; (i += 4) <= n;) { + a[i - 1] = v; + a[i - 2] = v; + a[i - 3] = v; + a[i - 4] = v; + } + if (i > n) + for (i -= 4; i < n; i++) + a[i] = v; + } } |