diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h b/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h index 22f9fe36601d..18f20908191f 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h +++ b/sys/cddl/contrib/opensolaris/uts/common/sys/sysmacros.h @@ -31,6 +31,7 @@ #define _SYS_SYSMACROS_H #include <sys/param.h> +#include <sys/isa_defs.h> #ifdef __cplusplus extern "C" { @@ -57,6 +58,9 @@ extern "C" { #ifndef ABS #define ABS(a) ((a) < 0 ? -(a) : (a)) #endif +#ifndef SIGNOF +#define SIGNOF(a) ((a) < 0 ? -1 : (a) > 0) +#endif #ifdef _KERNEL @@ -108,7 +112,7 @@ extern unsigned char bcd_to_byte[256]; #define L_MAXMIN L_MAXMIN32 #endif -#if defined(sun) +#ifdef sun #ifdef _KERNEL /* major part of a device internal to the kernel */ @@ -168,7 +172,6 @@ extern unsigned char bcd_to_byte[256]; #define getemajor(x) (major_t)((((dev_t)(x) >> L_BITSMINOR) > L_MAXMAJ) ? \ NODEV : (((dev_t)(x) >> L_BITSMINOR) & L_MAXMAJ)) #define geteminor(x) (minor_t)((x) & L_MAXMIN) - #endif /* sun */ /* @@ -371,6 +374,41 @@ extern unsigned char bcd_to_byte[256]; #define offsetof(s, m) ((size_t)(&(((s *)0)->m))) #endif +/* + * Find highest one bit set. + * Returns bit number + 1 of highest bit that is set, otherwise returns 0. + * High order bit is 31 (or 63 in _LP64 kernel). + */ +static __inline int +highbit(ulong_t i) +{ + register int h = 1; + + if (i == 0) + return (0); +#ifdef _LP64 + if (i & 0xffffffff00000000ul) { + h += 32; i >>= 32; + } +#endif + if (i & 0xffff0000) { + h += 16; i >>= 16; + } + if (i & 0xff00) { + h += 8; i >>= 8; + } + if (i & 0xf0) { + h += 4; i >>= 4; + } + if (i & 0xc) { + h += 2; i >>= 2; + } + if (i & 0x2) { + h += 1; + } + return (h); +} + #ifdef __cplusplus } #endif |