Author: hselasky
Date: Mon Jun 29 13:08:40 2020
New Revision: 362781
URL: https://svnweb.freebsd.org/changeset/base/362781
Log:
Implement is_signed(), type_max() and type_min() function macros in the
LinuxKPI.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/compat/linuxkpi/common/include/linux/kernel.h
Modified: head/sys/compat/linuxkpi/common/include/linux/kernel.h
==============================================================================
--- head/sys/compat/linuxkpi/common/include/linux/kernel.h Mon Jun 29
12:59:09 2020 (r362780)
+++ head/sys/compat/linuxkpi/common/include/linux/kernel.h Mon Jun 29
13:08:40 2020 (r362781)
@@ -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_ */
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