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Finish splitting m_core_clz into m_core_clz32 & m_core_clz64

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Patrick Pelissier committed 2018-04-15 00:10:38 +02:00
1 parent 8c34f44dae
commit b5f4f2fc4b
4 files changed
+6 -5
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m-core.h
+2 -2
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@@ -1277,7 +1277,7 @@ static inline uint64_t m_core_roundpow2(uint64_t v)
/* Return the count leading zero of the argument */
#if defined(__GNUC__) && (__GNUC__*100 + __GNUC_MINOR__) >= 304
static inline unsigned int m_core_clz(uint32_t limb)
static inline unsigned int m_core_clz32(uint32_t limb)
{
return M_UNLIKELY (limb == 0) ? sizeof(uint32_t)*CHAR_BIT : __builtin_clzl(limb) - (sizeof(unsigned long) - sizeof(uint32_t)) * CHAR_BIT;
}
@@ -1288,7 +1288,7 @@ static inline unsigned int m_core_clz64(uint64_t limb)
#else
#define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
static inline unsigned int m_core_clz(uint32_t limb)
static inline unsigned int m_core_clz32(uint32_t limb)
{
unsigned int shift = 0;
/* This code should be branchless on most targets */