Date: Mon, 13 Jul 2020 15:41:55 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r363155 - stable/11/sys/compat/linuxkpi/common/include/linux Message-ID: <202007131541.06DFftSL025950@repo.freebsd.org>
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Author: hselasky Date: Mon Jul 13 15:41:55 2020 New Revision: 363155 URL: https://svnweb.freebsd.org/changeset/base/363155 Log: MFC r362781 and r362794: Implement is_signed(), type_max() and type_min() function macros in the LinuxKPI. Sponsored by: Mellanox Technologies Modified: stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h Mon Jul 13 15:40:55 2020 (r363154) +++ stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h Mon Jul 13 15:41:55 2020 (r363155) @@ -536,4 +536,33 @@ linux_ratelimited(linux_ratelimit_t *rl) #define __is_constexpr(x) \ __builtin_constant_p(x) +/* + * The is_signed() macro below returns true if the passed data type is + * signed. Else false is returned. + */ +#define is_signed(datatype) (((datatype)-1 / (datatype)2) == (datatype)0) + +/* + * The type_max() macro below returns the maxium positive value the + * passed data type can hold. + */ +#define type_max(datatype) ( \ + (sizeof(datatype) >= 8) ? (is_signed(datatype) ? INT64_MAX : UINT64_MAX) : \ + (sizeof(datatype) >= 4) ? (is_signed(datatype) ? INT32_MAX : UINT32_MAX) : \ + (sizeof(datatype) >= 2) ? (is_signed(datatype) ? INT16_MAX : UINT16_MAX) : \ + (is_signed(datatype) ? INT8_MAX : UINT8_MAX) \ +) + +/* + * The type_min() macro below returns the minimum value the passed + * data type can hold. For unsigned types the minimum value is always + * zero. For signed types it may vary. + */ +#define type_min(datatype) ( \ + (sizeof(datatype) >= 8) ? (is_signed(datatype) ? INT64_MIN : 0) : \ + (sizeof(datatype) >= 4) ? (is_signed(datatype) ? INT32_MIN : 0) : \ + (sizeof(datatype) >= 2) ? (is_signed(datatype) ? INT16_MIN : 0) : \ + (is_signed(datatype) ? INT8_MIN : 0) \ +) + #endif /* _LINUX_KERNEL_H_ */
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