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qcacmn: Add qdf API to find last set bit

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Add qdf wrapper for Linux fls() to find last set bit.

Change-Id: I089fee397d619515c768521bda1f4d4c35526fe0
This commit is contained in:
Karunakar Dasineni
2019-10-24 14:13:19 -07:00
committed by nshrivas
parent 91da9dce36
commit 8e25a3077a
2 changed files with 26 additions and 0 deletions
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13
qdf/inc/qdf_util.h
View File

@@ -761,4 +761,17 @@ int qdf_hex_str_to_binary(u8 *dst, const char *src, size_t count)
return __qdf_hex_str_to_binary(dst, src, count); return __qdf_hex_str_to_binary(dst, src, count);
} }
/**
* qdf_fls() - find last set bit in a given 32 bit input
* @x: 32 bit mask
*
* Return: zero if the input is zero, otherwise returns the bit
* position of the last set bit, where the LSB is 1 and MSB is 32.
*/
static inline
int qdf_fls(uint32_t x)
{
return __qdf_fls(x);
}
#endif /*_QDF_UTIL_H*/ #endif /*_QDF_UTIL_H*/

13
qdf/linux/src/i_qdf_util.h
View File

@@ -472,4 +472,17 @@ int __qdf_hex_str_to_binary(u8 *dst, const char *src, size_t count)
return hex2bin(dst, src, count); return hex2bin(dst, src, count);
} }
/**
* __qdf_fls() - find last set bit in a given 32 bit input
* @x: 32 bit mask
*
* Return: zero if the input is zero, otherwise returns the bit
* position of the last set bit, where the LSB is 1 and MSB is 32.
*/
static inline
int __qdf_fls(uint32_t x)
{
return fls(x);
}
#endif /*_I_QDF_UTIL_H*/ #endif /*_I_QDF_UTIL_H*/