Added:
- crc32c_sse42_u32() emits 'crc32l' asm instruction;
- crc32c_sse42_u64() emits 'crc32q' asm instruction;
- crc32c_sse42_u64_mimic(), wrapper in case of run on 32-bit platform.
Signed-off-by: Yerden Zhumabekov <e_zhumabekov at sts.kz>
---
lib/librte_hash/rte_hash_crc.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_crc.h
index 4d7532a..9bd0cf6 100644
--- a/lib/librte_hash/rte_hash_crc.h
+++ b/lib/librte_hash/rte_hash_crc.h
@@ -363,6 +363,40 @@ crc32c_2words(uint64_t data, uint32_t init_val)
return crc;
}
+static inline uint32_t
+crc32c_sse42_u32(uint32_t data, uint32_t init_val)
+{
+ __asm__ volatile(
+ "crc32l %[data], %[init_val];"
+ : [init_val] "+r" (init_val)
+ : [data] "rm" (data));
+ return init_val;
+}
+
+static inline uint32_t
+crc32c_sse42_u64(uint64_t data, uint64_t init_val)
+{
+ __asm__ volatile(
+ "crc32q %[data], %[init_val];"
+ : [init_val] "+r" (init_val)
+ : [data] "rm" (data));
+ return init_val;
+}
+
+static inline uint32_t
+crc32c_sse42_u64_mimic(uint64_t data, uint64_t init_val)
+{
+ union {
+ uint32_t u32[2];
+ uint64_t u64;
+ } d;
+
+ d.u64 = data;
+ init_val = crc32c_sse42_u32(d.u32[0], init_val);
+ init_val = crc32c_sse42_u32(d.u32[1], init_val);
+ return init_val;
+}
+
/**
* Use single crc32 instruction to perform a hash on a 4 byte value.
*
--
1.7.9.5
