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implement inline bit manipulation function

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This commit is contained in:
hathach
2013-12-12 12:21:38 +07:00
parent 4d14e2ac50
commit 51b6c6ff41
5 changed files with 88 additions and 34 deletions
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58
tinyusb/common/binary.h
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@@ -36,12 +36,6 @@
*/
/**************************************************************************/
/** \file
* \brief TBD
*
* \note TBD
*/
/** \ingroup TBD
* \defgroup TBD
* \brief TBD
@@ -56,18 +50,54 @@
extern "C" {
#endif
/// n-th Bit
#define BIT_(n) (1U << (n))
#include "primitive_types.h"
#include "compiler/compiler.h"
/// set n-th bit of x to 1
#define BIT_SET_(x, n) ( (x) | BIT_(n) )
//------------- Bit manipulation -------------//
#define BIT_(n) (1U << (n)) ///< n-th Bit
#define BIT_SET_(x, n) ( (x) | BIT_(n) ) ///< set n-th bit of x to 1
#define BIT_CLR_(x, n) ( (x) & (~BIT_(n)) ) ///< clear n-th bit of x
#define BIT_TEST_(x, n) ( ((x) & BIT_(n)) ? true : false ) ///< check if n-th bit of x is 1
/// clear n-th bit of x
#define BIT_CLR_(x, n) ( (x) & (~BIT_(n)) )
static inline uint32_t bit_set(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint32_t bit_set(uint32_t value, uint8_t n)
{
return value | BIT_(n);
}
/// test n-th bit of x
#define BIT_TEST_(x, n) ( ((x) & BIT_(n)) ? true : false )
static inline uint32_t bit_clear(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint32_t bit_clear(uint32_t value, uint8_t n)
{
return value & (~BIT_(n));
}
static inline bool bit_test(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline bool bit_test(uint32_t value, uint8_t n)
{
return (value & BIT_(n)) ? true : false;
}
///< create a mask with n-bit lsb set to 1
static inline uint32_t bit_mask(uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint32_t bit_mask(uint8_t n)
{
return (n < 32) ? ( BIT_(n) - 1 ) : UINT32_MAX;
}
static inline uint32_t bit_mask_range(uint8_t start, uint32_t end) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint32_t bit_mask_range(uint8_t start, uint32_t end)
{
return bit_mask(end+1) & ~ bit_mask(start);
}
static inline uint32_t bit_set_range(uint32_t value, uint8_t start, uint8_t end, uint32_t pattern) ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint32_t bit_set_range(uint32_t value, uint8_t start, uint8_t end, uint32_t pattern)
{
return ( value & ~bit_mask_range(start, end) ) | (pattern << start);
}
//------------- Binary Constant -------------//
#if defined(__GNUC__) && !defined(__CC_ARM)
#define BIN8(x) ((uint8_t) (0b##x))