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refine: move BIT Macro to nuttx/bits.h

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The BIT macro is widely used in NuttX,
and to achieve a unified strategy,
we have placed the implementation of the BIT macro
in bits.h to simplify code implementation.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5
2023-10-10 09:50:35 +08:00
committed by Xiang Xiao
parent 602c644f4d
commit 061be5f18e
15 changed files with 34 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/nuttx/bits.h
+15 -14
View File
@@ -26,31 +26,32 @@
****************************************************************************/
#include <assert.h>
#include <inttypes.h>
#include <stdint.h>
#include <limits.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef BITS_PER_BYTE
# define BITS_PER_BYTE 8
# define BITS_PER_BYTE CHAR_BIT
#endif
#if UINTPTR_MAX > UINT32_MAX
# define BITS_PER_LONG 64
#else
# define BITS_PER_LONG 32
#ifndef BITS_PER_LONG
# define BITS_PER_LONG (sizeof(unsigned long) * BITS_PER_BYTE)
#endif
#ifndef BITS_PER_LONG_LONG
# define BITS_PER_LONG_LONG 64
# define BITS_PER_LONG_LONG (sizeof(unsigned long long) * BITS_PER_BYTE)
#endif
#define BIT_MASK(nr) (UINT32_C(1) << ((nr) % BITS_PER_LONG))
#define BIT_BYTE_MASK(nr) (1ul << ((nr) % BITS_PER_BYTE))
#define BIT_WORD_MASK(nr) (1ul << ((nr) % BITS_PER_LONG))
#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#define BIT_ULL_MASK(nr) (UINT64_C(1) << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_MASK(nr) (1ull << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
#define BIT(nr) (1ul << (nr))
#define BIT_ULL(nr) (1ull << (nr))
/* Create a contiguous bitmask starting at bit position @l and ending at
* position @h. For example
@@ -58,14 +59,14 @@
*/
#define __GENMASK(h, l) \
(((~UINT32_C(0)) - (UINT32_C(1) << (l)) + 1) & \
(~UINT32_C(0) >> (BITS_PER_LONG - 1 - (h))))
(((~0ul) - (1ul << (l)) + 1) & \
(~0ul >> (BITS_PER_LONG - 1 - (h))))
#define GENMASK(h, l) \
(BUILD_BUG_ON_ZERO((l) > (h)) + __GENMASK(h, l))
#define __GENMASK_ULL(h, l) \
(((~UINT64_C(0)) - (UINT64_C(1) << (l)) + 1) & \
(~UINT64_C(0) >> (BITS_PER_LONG_LONG - 1 - (h))))
(((~0ull) - (1ull << (l)) + 1) & \
(~0ull >> (BITS_PER_LONG_LONG - 1 - (h))))
#define GENMASK_ULL(h, l) \
(BUILD_BUG_ON_ZERO((l) > (h)) + __GENMASK_ULL(h, l))
include/nuttx/sensors/mpu9250.h
+1 -4
View File
@@ -28,15 +28,12 @@
#include <nuttx/config.h>
#include <nuttx/sensors/sensor.h>
#include <nuttx/sensors/ioctl.h>
#include <nuttx/bits.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Sets bit @n */
#define BIT(n) (1 << (n))
/* Creates a mask of @m bits, i.e. MASK(2) -> 00000011 */
#define MASK(m) (BIT(m) - 1)