include/asm-alpha/compiler.h

   1 #ifndef __ALPHA_COMPILER_H
   2 #define __ALPHA_COMPILER_H
   3
   4 /*
   5  * Herein are macros we use when describing various patterns we want to GCC.
   6  * In all cases we can get better schedules out of the compiler if we hide
   7  * as little as possible inside inline assembly.  However, we want to be
   8  * able to know what we'll get out before giving up inline assembly.  Thus
   9  * these tests and macros.
  10  */
  11
  12 #if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
  13 # define __kernel_insbl(val, shift)     __builtin_alpha_insbl(val, shift)
  14 # define __kernel_inswl(val, shift)     __builtin_alpha_inswl(val, shift)
  15 # define __kernel_insql(val, shift)     __builtin_alpha_insql(val, shift)
  16 # define __kernel_inslh(val, shift)     __builtin_alpha_inslh(val, shift)
  17 # define __kernel_extbl(val, shift)     __builtin_alpha_extbl(val, shift)
  18 # define __kernel_extwl(val, shift)     __builtin_alpha_extwl(val, shift)
  19 # define __kernel_cmpbge(a, b)          __builtin_alpha_cmpbge(a, b)
  20 # define __kernel_cttz(x)               __builtin_ctzl(x)
  21 # define __kernel_ctlz(x)               __builtin_clzl(x)
  22 # define __kernel_ctpop(x)              __builtin_popcountl(x)
  23 #else
  24 # define __kernel_insbl(val, shift)                                     \
  25   ({ unsigned long __kir;                                               \
  26      __asm__("insbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  27      __kir; })
  28 # define __kernel_inswl(val, shift)                                     \
  29   ({ unsigned long __kir;                                               \
  30      __asm__("inswl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  31      __kir; })
  32 # define __kernel_insql(val, shift)                                     \
  33   ({ unsigned long __kir;                                               \
  34      __asm__("insql %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  35      __kir; })
  36 # define __kernel_inslh(val, shift)                                     \
  37   ({ unsigned long __kir;                                               \
  38      __asm__("inslh %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  39      __kir; })
  40 # define __kernel_extbl(val, shift)                                     \
  41   ({ unsigned long __kir;                                               \
  42      __asm__("extbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  43      __kir; })
  44 # define __kernel_extwl(val, shift)                                     \
  45   ({ unsigned long __kir;                                               \
  46      __asm__("extwl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));   \
  47      __kir; })
  48 # define __kernel_cmpbge(a, b)                                          \
  49   ({ unsigned long __kir;                                               \
  50      __asm__("cmpbge %r2,%1,%0" : "=r"(__kir) : "rI"(b), "rJ"(a));      \
  51      __kir; })
  52 # define __kernel_cttz(x)                                               \
  53   ({ unsigned long __kir;                                               \
  54      __asm__("cttz %1,%0" : "=r"(__kir) : "r"(x));                      \
  55      __kir; })
  56 # define __kernel_ctlz(x)                                               \
  57   ({ unsigned long __kir;                                               \
  58      __asm__("ctlz %1,%0" : "=r"(__kir) : "r"(x));                      \
  59      __kir; })
  60 # define __kernel_ctpop(x)                                              \
  61   ({ unsigned long __kir;                                               \
  62      __asm__("ctpop %1,%0" : "=r"(__kir) : "r"(x));                     \
  63      __kir; })
  64 #endif
  65
  66
  67 /*
  68  * Beginning with EGCS 1.1, GCC defines __alpha_bwx__ when the BWX
  69  * extension is enabled.  Previous versions did not define anything
  70  * we could test during compilation -- too bad, so sad.
  71  */
  72
  73 #if defined(__alpha_bwx__)
  74 #define __kernel_ldbu(mem)      (mem)
  75 #define __kernel_ldwu(mem)      (mem)
  76 #define __kernel_stb(val,mem)   ((mem) = (val))
  77 #define __kernel_stw(val,mem)   ((mem) = (val))
  78 #else
  79 #define __kernel_ldbu(mem)                              \
  80   ({ unsigned char __kir;                               \
  81      __asm__("ldbu %0,%1" : "=r"(__kir) : "m"(mem));    \
  82      __kir; })
  83 #define __kernel_ldwu(mem)                              \
  84   ({ unsigned short __kir;                              \
  85      __asm__("ldwu %0,%1" : "=r"(__kir) : "m"(mem));    \
  86      __kir; })
  87 #define __kernel_stb(val,mem) \
  88   __asm__("stb %1,%0" : "=m"(mem) : "r"(val))
  89 #define __kernel_stw(val,mem) \
  90   __asm__("stw %1,%0" : "=m"(mem) : "r"(val))
  91 #endif
  92
  93 #ifdef __KERNEL__
  94 /* Some idiots over in <linux/compiler.h> thought inline should imply
  95    always_inline.  This breaks stuff.  We'll include this file whenever
  96    we run into such problems.  */
  97
  98 #include <linux/compiler.h>
  99 #undef inline
 100 #undef __inline__
 101 #undef __inline
 102 #undef __always_inline
 103 #define __always_inline         inline __attribute__((always_inline))
 104
 105 #endif /* __KERNEL__ */
 106
 107 #endif /* __ALPHA_COMPILER_H */