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[dpdk-dev,v5,2/7] hash: add assembly implementation of CRC32 intrinsics

Message ID 44ef6fb19223e71d514f18b406342ddeda09529d.1416459284.git.e_zhumabekov@sts.kz (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Yerden Zhumabekov Nov. 20, 2014, 5:16 a.m. UTC
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@sts.kz>
---
 lib/librte_hash/rte_hash_crc.h |   34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
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Patch

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.
  *