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head/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h
| Show All 26 Lines | |||||
| * Use is subject to license terms. | * Use is subject to license terms. | ||||
| */ | */ | ||||
| #ifndef _SYS_SYSMACROS_H | #ifndef _SYS_SYSMACROS_H | ||||
| #define _SYS_SYSMACROS_H | #define _SYS_SYSMACROS_H | ||||
| #include <sys/param.h> | #include <sys/param.h> | ||||
| #include <sys/isa_defs.h> | #include <sys/isa_defs.h> | ||||
| #if defined(__FreeBSD__) && defined(_KERNEL) | |||||
| #include <sys/libkern.h> | |||||
| #endif | |||||
| #ifdef __cplusplus | #ifdef __cplusplus | ||||
| extern "C" { | extern "C" { | ||||
| #endif | #endif | ||||
| /* | /* | ||||
| * Some macros for units conversion | * Some macros for units conversion | ||||
| */ | */ | ||||
| ▲ Show 20 Lines • Show All 334 Lines • ▼ Show 20 Lines | |||||
| /* | /* | ||||
| * Find highest one bit set. | * Find highest one bit set. | ||||
| * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | ||||
| * High order bit is 31 (or 63 in _LP64 kernel). | * High order bit is 31 (or 63 in _LP64 kernel). | ||||
| */ | */ | ||||
| static __inline int | static __inline int | ||||
| highbit(ulong_t i) | highbit(ulong_t i) | ||||
| { | { | ||||
| #if defined(__FreeBSD__) && defined(_KERNEL) && defined(HAVE_INLINE_FLSL) | |||||
| return (flsl(i)); | |||||
| #else | |||||
| register int h = 1; | register int h = 1; | ||||
| if (i == 0) | if (i == 0) | ||||
| return (0); | return (0); | ||||
| #ifdef _LP64 | #ifdef _LP64 | ||||
| if (i & 0xffffffff00000000ul) { | if (i & 0xffffffff00000000ul) { | ||||
| h += 32; i >>= 32; | h += 32; i >>= 32; | ||||
| } | } | ||||
| Show All 9 Lines | #endif | ||||
| } | } | ||||
| if (i & 0xc) { | if (i & 0xc) { | ||||
| h += 2; i >>= 2; | h += 2; i >>= 2; | ||||
| } | } | ||||
| if (i & 0x2) { | if (i & 0x2) { | ||||
| h += 1; | h += 1; | ||||
| } | } | ||||
| return (h); | return (h); | ||||
| #endif | |||||
| } | } | ||||
| /* | /* | ||||
| * Find highest one bit set. | * Find highest one bit set. | ||||
| * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | ||||
| */ | */ | ||||
| static __inline int | static __inline int | ||||
| highbit64(uint64_t i) | highbit64(uint64_t i) | ||||
| { | { | ||||
| #if defined(__FreeBSD__) && defined(_KERNEL) && defined(HAVE_INLINE_FLSLL) | |||||
| return (flsll(i)); | |||||
| #else | |||||
| int h = 1; | int h = 1; | ||||
| if (i == 0) | if (i == 0) | ||||
| return (0); | return (0); | ||||
| if (i & 0xffffffff00000000ULL) { | if (i & 0xffffffff00000000ULL) { | ||||
| h += 32; i >>= 32; | h += 32; i >>= 32; | ||||
| } | } | ||||
| if (i & 0xffff0000) { | if (i & 0xffff0000) { | ||||
| h += 16; i >>= 16; | h += 16; i >>= 16; | ||||
| } | } | ||||
| if (i & 0xff00) { | if (i & 0xff00) { | ||||
| h += 8; i >>= 8; | h += 8; i >>= 8; | ||||
| } | } | ||||
| if (i & 0xf0) { | if (i & 0xf0) { | ||||
| h += 4; i >>= 4; | h += 4; i >>= 4; | ||||
| } | } | ||||
| if (i & 0xc) { | if (i & 0xc) { | ||||
| h += 2; i >>= 2; | h += 2; i >>= 2; | ||||
| } | } | ||||
| if (i & 0x2) { | if (i & 0x2) { | ||||
| h += 1; | h += 1; | ||||
| } | } | ||||
| return (h); | return (h); | ||||
| #endif | |||||
| } | } | ||||
| #ifdef __cplusplus | #ifdef __cplusplus | ||||
| } | } | ||||
| #endif | #endif | ||||
| #endif /* _SYS_SYSMACROS_H */ | #endif /* _SYS_SYSMACROS_H */ | ||||