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amdgpu/addrlib: add explicit Log2NonPow2 function

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Roy Zhan 2015-04-08 23:03:34 -04:00 • committed by Marek Olšák
parent 4a4b7da141
commit c16e1e2041
1 changed files with 20 additions and 8 deletions
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28
src/amd/addrlib/core/addrcommon.h
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@ -445,22 +445,17 @@ static inline UINT_32 NextPow2(
/** /**
*************************************************************************************************** ***************************************************************************************************
* Log2 * Log2NonPow2
* *
* @brief * @brief
* Compute log of base 2 * Compute log of base 2 no matter the target is power of 2 or not
*************************************************************************************************** ***************************************************************************************************
*/ */
static inline UINT_32 Log2( static inline UINT_32 Log2NonPow2(
UINT_32 x) ///< [in] the value should calculate log based 2 UINT_32 x) ///< [in] the value should calculate log based 2
{ {
UINT_32 y; UINT_32 y;
//
// Assert that x is a power of two.
//
ADDR_ASSERT(IsPow2(x));
y = 0; y = 0;
while (x > 1) while (x > 1)
{ {
@ -471,6 +466,23 @@ static inline UINT_32 Log2(
return y; return y;
} }
/**
***************************************************************************************************
* Log2
*
* @brief
* Compute log of base 2
***************************************************************************************************
*/
static inline UINT_32 Log2(
UINT_32 x) ///< [in] the value should calculate log based 2
{
// Assert that x is a power of two.
ADDR_ASSERT(IsPow2(x));
return Log2NonPow2(x);
}
/** /**
*************************************************************************************************** ***************************************************************************************************
* QLog2 * QLog2