#ifndef __included_crc32_h__
#define __included_crc32_h__
+#include <vppinfra/clib.h>
+
#if __SSE4_2__
+#define clib_crc32c_uses_intrinsics
#include <x86intrin.h>
+static_always_inline u32
+clib_crc32c_u8 (u32 last, u8 data)
+{
+ return _mm_crc32_u8 (last, data);
+}
+
+static_always_inline u32
+clib_crc32c_u16 (u32 last, u16 data)
+{
+ return _mm_crc32_u16 (last, data);
+}
static_always_inline u32
-clib_crc32c (u8 * s, int len)
+clib_crc32c_u32 (u32 last, u32 data)
{
- u32 v = 0;
+ return _mm_crc32_u32 (last, data);
+}
-#if __x86_64__
- for (; len >= 8; len -= 8, s += 8)
- v = _mm_crc32_u64 (v, *((u64 *) s));
-#else
- /* workaround weird GCC bug when using _mm_crc32_u32
- which happens with -O2 optimization */
- volatile ("":::"memory");
+static_always_inline u32
+clib_crc32c_u64 (u32 last, u64 data)
+{
+ return _mm_crc32_u64 (last, data);
+}
#endif
+#if __ARM_FEATURE_CRC32
+#define clib_crc32c_uses_intrinsics
+#include <arm_acle.h>
+static_always_inline u32
+clib_crc32c_u8 (u32 last, u8 data)
+{
+ return __crc32cd (last, data);
+}
+
+static_always_inline u32
+clib_crc32c_u16 (u32 last, u16 data)
+{
+ return __crc32ch (last, data);
+}
+
+static_always_inline u32
+clib_crc32c_u32 (u32 last, u32 data)
+{
+ return __crc32cw (last, data);
+}
+
+static_always_inline u32
+clib_crc32c_u64 (u32 last, u64 data)
+{
+ return __crc32cd (last, data);
+}
+#endif
+
+#ifdef clib_crc32c_uses_intrinsics
+static_always_inline u32
+clib_crc32c_with_init (u8 *s, int len, u32 last)
+{
+ for (; len >= 8; len -= 8, s += 8)
+ last = clib_crc32c_u64 (last, *((u64u *) s));
+
for (; len >= 4; len -= 4, s += 4)
- v = _mm_crc32_u32 (v, *((u32 *) s));
+ last = clib_crc32c_u32 (last, *((u32u *) s));
for (; len >= 2; len -= 2, s += 2)
- v = _mm_crc32_u16 (v, *((u16 *) s));
+ last = clib_crc32c_u16 (last, *((u16u *) s));
for (; len >= 1; len -= 1, s += 1)
- v = _mm_crc32_u8 (v, *((u16 *) s));
+ last = clib_crc32c_u8 (last, *((u8 *) s));
- return v;
+ return last;
}
+static_always_inline u32
+clib_crc32c (u8 *s, int len)
+{
+ return clib_crc32c_with_init (s, len, 0);
+}
#endif
#endif /* __included_crc32_h__ */