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#ifndef __ASM_X86_HASH_H
#define __ASM_X86_HASH_H
#include <linux/cpufeature.h>
#include <asm/alternative.h>
u32 __intel_crc4_2_hash(const void *data, u32 len, u32 seed);
u32 __intel_crc4_2_hash2(const u32 *data, u32 len, u32 seed);
/*
* non-inline versions of jhash so gcc does not need to generate
* duplicate code in every object file
*/
u32 __jhash(const void *data, u32 len, u32 seed);
u32 __jhash2(const u32 *data, u32 len, u32 seed);
/*
* for documentation of these functions please look into
* <include/asm-generic/hash.h>
*/
static inline u32 arch_fast_hash(const void *data, u32 len, u32 seed)
{
u32 hash;
alternative_call(__jhash, __intel_crc4_2_hash, X86_FEATURE_XMM4_2,
#ifdef CONFIG_X86_64
"=a" (hash), "D" (data), "S" (len), "d" (seed));
#else
"=a" (hash), "a" (data), "d" (len), "c" (seed));
#endif
return hash;
}
static inline u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
{
u32 hash;
alternative_call(__jhash2, __intel_crc4_2_hash2, X86_FEATURE_XMM4_2,
#ifdef CONFIG_X86_64
"=a" (hash), "D" (data), "S" (len), "d" (seed));
#else
"=a" (hash), "a" (data), "d" (len), "c" (seed));
#endif
return hash;
}
#endif /* __ASM_X86_HASH_H */
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