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Implement is_signed(), type_max() and type_min() function macros in the

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LinuxKPI.

MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2020-06-29 13:08:40 +00:00
parent 1ea7952510
commit d0eed838e3
1 changed files with 16 additions and 0 deletions
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16
sys/compat/linuxkpi/common/include/linux/kernel.h
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@ -564,4 +564,20 @@ linux_ratelimited(linux_ratelimit_t *rl)
#define __is_constexpr(x) \
__builtin_constant_p(x)
#define is_signed(x) (((x)-1 / (x)2) == (x)0)
#define type_max(x) ( \
(sizeof(x) >= 8) ? (is_signed(x) ? INT64_MAX : UINT64_MAX) : \
(sizeof(x) >= 4) ? (is_signed(x) ? INT32_MAX : UINT32_MAX) : \
(sizeof(x) >= 2) ? (is_signed(x) ? INT16_MAX : UINT16_MAX) : \
(is_signed(x) ? INT8_MAX : UINT8_MAX) \
)
#define type_min(x) ( \
(sizeof(x) >= 8) ? (is_signed(x) ? INT64_MIN : 0) : \
(sizeof(x) >= 4) ? (is_signed(x) ? INT32_MIN : 0) : \
(sizeof(x) >= 2) ? (is_signed(x) ? INT16_MIN : 0) : \
(is_signed(x) ? INT8_MIN : 0) \
)
#endif /* _LINUX_KERNEL_H_ */