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  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 #ifndef _ASM_BITMAP_H
  28 #define _ASM_BITMAP_H
  29 
  30 #include <sys/ccompile.h>
  31 #include <sys/types.h>
  32 
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36 
  37 #if !defined(__lint) && defined(__GNUC__)
  38 








  39 extern __GNU_INLINE int
  40 highbit(ulong_t i)
  41 {
  42         long __value = -1l;
  43 
  44 #if defined(__amd64)
  45         __asm__(
  46             "bsrq       %1,%0"
  47             : "+r" (__value)
  48             : "r" (i)
  49             : "cc");
  50 #elif defined(__i386)
  51         __asm__(
  52             "bsrl       %1,%0"
  53             : "+r" (__value)
  54             : "r" (i)
  55             : "cc");
  56 #else
  57 #error  "port me"
  58 #endif
  59         return ((int)(__value + 1));
  60 }
  61 
  62 extern __GNU_INLINE int
  63 lowbit(ulong_t i)
  64 {
  65         long __value = -1l;
  66 
  67 #if defined(__amd64)
  68         __asm__(
  69             "bsfq       %1,%0"
  70             : "+r" (__value)
  71             : "r" (i)
  72             : "cc");
  73 #elif defined(__i386)
  74         __asm__(
  75             "bsfl       %1,%0"
  76             : "+r" (__value)
  77             : "r" (i)
  78             : "cc");
  79 #else
  80 #error  "port me"
  81 #endif
  82         return ((int)(__value + 1));
  83 }
  84 
  85 extern __GNU_INLINE uint_t
  86 atomic_btr32(uint32_t *memory, uint_t bitnum)
  87 {
  88         uint8_t __value;
  89 
  90 #if defined(__amd64)
  91         __asm__ __volatile__(
  92             "lock;"
  93             "btrl %2, (%0);"
  94             "setc %1"
  95             : "+r" (memory), "+r" (__value)
  96             : "ir" (bitnum)
  97             : "cc");
  98 #elif defined(__i386)
  99         __asm__ __volatile__(
 100             "lock;"
 101             "btrl %2, (%0);"
 102             "setc %1"
 103             : "+r" (memory), "=r" (__value)
 104             : "ir" (bitnum)
 105             : "cc");
 106 #else
 107 #error  "port me"
 108 #endif
 109         return ((uint_t)__value);
 110 }


 111 
 112 #endif  /* !__lint && __GNUC__ */
 113 
 114 #ifdef  __cplusplus
 115 }
 116 #endif
 117 
 118 #endif  /* _ASM_BITMAP_H */


  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 #ifndef _ASM_BITMAP_H
  28 #define _ASM_BITMAP_H
  29 
  30 #include <sys/ccompile.h>
  31 #include <sys/types.h>
  32 
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36 
  37 #if !defined(__lint) && defined(__GNUC__)
  38 
  39 #if defined(__amd64)
  40 #define __SUF   "q"
  41 #elif defined(__i386)
  42 #define __SUF   "l"
  43 #else
  44 #error "port me"
  45 #endif
  46 
  47 extern __GNU_INLINE int
  48 highbit(ulong_t i)
  49 {
  50         long value = -1l;
  51 







  52         __asm__(
  53             "bsr" __SUF " %1,%0"
  54             : "+r" (value)
  55             : "r" (i)
  56             : "cc");
  57 
  58         return ((int)(value + 1));


  59 }
  60 
  61 extern __GNU_INLINE int
  62 lowbit(ulong_t i)
  63 {
  64         long value = -1l;
  65 







  66         __asm__(
  67             "bsf" __SUF " %1,%0"
  68             : "+r" (value)
  69             : "r" (i)
  70             : "cc");
  71 
  72         return ((int)(value + 1));


  73 }
  74 
  75 extern __GNU_INLINE uint_t
  76 atomic_btr32(uint32_t *memory, uint_t bitnum)
  77 {
  78         uint8_t value;
  79 









  80         __asm__ __volatile__(
  81             "lock;"
  82             "btrl %2,%0;"
  83             "setc %1"
  84             : "+m" (*memory), "=r" (value)
  85             : "ir" (bitnum)
  86             : "cc");
  87 
  88         return ((uint_t)value);


  89 }
  90 
  91 #undef __SUF
  92 
  93 #endif  /* !__lint && __GNUC__ */
  94 
  95 #ifdef  __cplusplus
  96 }
  97 #endif
  98 
  99 #endif  /* _ASM_BITMAP_H */