Platform Namespace Reference

Functions
U64	countLeadingZeroes (U64 value)
U32	countLeadingZeroes (U32 value)
U64	countTrailingZeroes (U64 value)
U32	countTrailingZeroes (U32 value)
U64	floorLogTwo (U64 value)
U32	floorLogTwo (U32 value)
U64	ceilLogTwo (U64 value)
U32	ceilLogTwo (U32 value)

Function Documentation

ceilLogTwo() [1/2]

U32 Platform::ceilLogTwo ( U32 value )

inline

Definition at line 32 of file Platform.h.

{ return floorLogTwo(value * 2 - 1); }

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ceilLogTwo() [2/2]

U64 Platform::ceilLogTwo ( U64 value )

inline

Definition at line 31 of file Platform.h.

{ return floorLogTwo(value * 2 - 1); }

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countLeadingZeroes() [1/2]

U32 Platform::countLeadingZeroes ( U32 value )

inline

Definition at line 26 of file Platform.h.

{ return value == 0 ? 32 : __builtin_clz(value); }

countLeadingZeroes() [2/2]

U64 Platform::countLeadingZeroes ( U64 value )

inline

Definition at line 25 of file Platform.h.

{ return value == 0 ? 64 : __builtin_clzll(value); }

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countTrailingZeroes() [1/2]

U32 Platform::countTrailingZeroes ( U32 value )

inline

Definition at line 28 of file Platform.h.

{ return value == 0 ? 32 : __builtin_ctz(value); }

countTrailingZeroes() [2/2]

U64 Platform::countTrailingZeroes ( U64 value )

inline

Definition at line 27 of file Platform.h.

{ return value == 0 ? 64 : __builtin_ctzll(value); }

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floorLogTwo() [1/2]

U32 Platform::floorLogTwo ( U32 value )

inline

Definition at line 30 of file Platform.h.

{ return value <= 1 ? 0 : 31 - countLeadingZeroes(value); }

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floorLogTwo() [2/2]

U64 Platform::floorLogTwo ( U64 value )

inline

Definition at line 29 of file Platform.h.

{ return value <= 1 ? 0 : 63 - countLeadingZeroes(value); }

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