#endif
#include <stdint.h>
-#include <rte_config.h>
-#include <rte_cpuflags.h>
+
#include <rte_branch_prediction.h>
#include <rte_common.h>
+#include <rte_config.h>
+#include <rte_cpuflags.h>
+#include <rte_log.h>
#include "rte_crc_sw.h"
#if defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
#include "rte_crc_arm64.h"
-#else
+#elif defined(RTE_ARCH_X86)
#include "rte_crc_x86.h"
+#else
+#include "rte_crc_generic.h"
+#endif
/**
- * Allow or disallow use of SSE4.2 instrinsics for CRC32 hash
+ * Allow or disallow use of SSE4.2/ARMv8 intrinsics for CRC32 hash
* calculation.
*
* @param alg
* An OR of following flags:
- * - (CRC32_SW) Don't use SSE4.2 intrinsics
+ * - (CRC32_SW) Don't use SSE4.2/ARMv8 intrinsics (default non-[x86/ARMv8])
* - (CRC32_SSE42) Use SSE4.2 intrinsics if available
- * - (CRC32_SSE42_x64) Use 64-bit SSE4.2 intrinsic if available (default)
+ * - (CRC32_SSE42_x64) Use 64-bit SSE4.2 intrinsic if available (default x86)
+ * - (CRC32_ARM64) Use ARMv8 CRC intrinsic if available (default ARMv8)
*
*/
static inline void
rte_hash_crc_set_alg(uint8_t alg)
{
-#if defined(RTE_ARCH_X86)
- if (alg == CRC32_SSE42_x64 &&
- !rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T))
- alg = CRC32_SSE42;
+ crc32_alg = CRC32_SW;
+
+ if (alg == CRC32_SW)
+ return;
+
+#if defined RTE_ARCH_X86
+ if (!(alg & CRC32_SSE42_x64))
+ RTE_LOG(WARNING, HASH,
+ "Unsupported CRC32 algorithm requested using CRC32_x64/CRC32_SSE42\n");
+ if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T) || alg == CRC32_SSE42)
+ crc32_alg = CRC32_SSE42;
+ else
+ crc32_alg = CRC32_SSE42_x64;
+#endif
+
+#if defined RTE_ARCH_ARM64
+ if (!(alg & CRC32_ARM64))
+ RTE_LOG(WARNING, HASH,
+ "Unsupported CRC32 algorithm requested using CRC32_ARM64\n");
+ if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_CRC32))
+ crc32_alg = CRC32_ARM64;
#endif
- crc32_alg = alg;
+
+ if (crc32_alg == CRC32_SW)
+ RTE_LOG(WARNING, HASH,
+ "Unsupported CRC32 algorithm requested using CRC32_SW\n");
}
/* Setting the best available algorithm */
RTE_INIT(rte_hash_crc_init_alg)
{
+#if defined(RTE_ARCH_X86)
rte_hash_crc_set_alg(CRC32_SSE42_x64);
+#elif defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_CRC32)
+ rte_hash_crc_set_alg(CRC32_ARM64);
+#else
+ rte_hash_crc_set_alg(CRC32_SW);
+#endif
}
+#ifdef __DOXYGEN__
+
/**
- * Use single crc32 instruction to perform a hash on a byte value.
- * Fall back to software crc32 implementation in case SSE4.2 is
- * not supported
+ * Use single CRC32 instruction to perform a hash on a byte value.
*
* @param data
* Data to perform hash on.
* 32bit calculated hash value.
*/
static inline uint32_t
-rte_hash_crc_1byte(uint8_t data, uint32_t init_val)
-{
-#if defined RTE_ARCH_X86
- if (likely(crc32_alg & CRC32_SSE42))
- return crc32c_sse42_u8(data, init_val);
-#endif
-
- return crc32c_1byte(data, init_val);
-}
+rte_hash_crc_1byte(uint8_t data, uint32_t init_val);
/**
- * Use single crc32 instruction to perform a hash on a 2 bytes value.
- * Fall back to software crc32 implementation in case SSE4.2 is
- * not supported
+ * Use single CRC32 instruction to perform a hash on a 2 bytes value.
*
* @param data
* Data to perform hash on.
* 32bit calculated hash value.
*/
static inline uint32_t
-rte_hash_crc_2byte(uint16_t data, uint32_t init_val)
-{
-#if defined RTE_ARCH_X86
- if (likely(crc32_alg & CRC32_SSE42))
- return crc32c_sse42_u16(data, init_val);
-#endif
-
- return crc32c_2bytes(data, init_val);
-}
+rte_hash_crc_2byte(uint16_t data, uint32_t init_val);
/**
- * Use single crc32 instruction to perform a hash on a 4 byte value.
- * Fall back to software crc32 implementation in case SSE4.2 is
- * not supported
+ * Use single CRC32 instruction to perform a hash on a 4 bytes value.
*
* @param data
* Data to perform hash on.
* 32bit calculated hash value.
*/
static inline uint32_t
-rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
-{
-#if defined RTE_ARCH_X86
- if (likely(crc32_alg & CRC32_SSE42))
- return crc32c_sse42_u32(data, init_val);
-#endif
-
- return crc32c_1word(data, init_val);
-}
+rte_hash_crc_4byte(uint32_t data, uint32_t init_val);
/**
- * Use single crc32 instruction to perform a hash on a 8 byte value.
- * Fall back to software crc32 implementation in case SSE4.2 is
- * not supported
+ * Use single CRC32 instruction to perform a hash on a 8 bytes value.
*
* @param data
* Data to perform hash on.
* 32bit calculated hash value.
*/
static inline uint32_t
-rte_hash_crc_8byte(uint64_t data, uint32_t init_val)
-{
-#ifdef RTE_ARCH_X86_64
- if (likely(crc32_alg == CRC32_SSE42_x64))
- return crc32c_sse42_u64(data, init_val);
-#endif
-
-#if defined RTE_ARCH_X86
- if (likely(crc32_alg & CRC32_SSE42))
- return crc32c_sse42_u64_mimic(data, init_val);
-#endif
+rte_hash_crc_8byte(uint64_t data, uint32_t init_val);
- return crc32c_2words(data, init_val);
-}
-
-#endif
+#endif /* __DOXYGEN__ */
/**
* Calculate CRC32 hash on user-supplied byte array.