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[feat][common] add arch_ffsll、arch_ctzll、arch_clzll function

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This commit is contained in:
jzlv 2021-11-10 16:53:03 +08:00
parent b51bfd7b14
commit a9ea715135
2 changed files with 43 additions and 4 deletions
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40
common/misc/misc.c
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@ -188,6 +188,46 @@ void fifocopy_to_mem(void *fifo_addr, uint8_t *data, uint32_t length)
}
}
/****************************************************************************/ /**
* @brief get u64 first number 1 from right to left
*
* @param val: target value
* @param bit: first 1 in bit
*
* @return SUCCESS or ERROR
*
*******************************************************************************/
int arch_ffsll(uint64_t *val, uint32_t *bit)
{
if (!*val) {
return ERROR;
}
*bit = __builtin_ffsll(*val) - 1;
*val &= ~((1ULL) << (*bit));
return 0;
}
int arch_ctzll(uint64_t *val, uint32_t *bit)
{
if (!*val)
return -1;
*bit = __builtin_ctzll(*val);
*val &= ~((1ULL) << (*bit));
return 0;
}
int arch_clzll(uint64_t *val, uint32_t *bit)
{
if (!*val)
return -1;
*bit = __builtin_clzll(*val);
*val &= ~((1ULL) << (*bit));
return 0;
}
#ifdef DEBUG
/*******************************************************************************
* @brief Reports the name of the source file and the source line number

7
common/misc/misc.h
View File

@ -39,10 +39,6 @@
#define BIT(n) (1UL << (n))
#endif
#ifndef CHECK_PARAM
#define CHECK_PARAM(expr) ((void)0)
#endif
/**
* @brief Null Type definition
*/
@ -129,4 +125,7 @@ void *arch_memcpy_fast(void *pdst, const void *psrc, uint32_t n);
uint32_t *arch_memset4(uint32_t *dst, const uint32_t val, uint32_t n);
void memcopy_to_fifo(void *fifo_addr, uint8_t *data, uint32_t length);
void fifocopy_to_mem(void *fifo_addr, uint8_t *data, uint32_t length);
int arch_ctzll(uint64_t *val, uint32_t *bit);
int arch_clzll(uint64_t *val, uint32_t *bit);
int arch_ffsll(uint64_t *val, uint32_t *bit);
#endif