summaryrefslogtreecommitdiff
path: root/include/asm-alpha/compiler.h
blob: da6bb199839c1dc221dbcd30a1737e364ee722f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#ifndef __ALPHA_COMPILER_H
#define __ALPHA_COMPILER_H

/* 
 * Herein are macros we use when describing various patterns we want to GCC.
 * In all cases we can get better schedules out of the compiler if we hide
 * as little as possible inside inline assembly.  However, we want to be
 * able to know what we'll get out before giving up inline assembly.  Thus
 * these tests and macros.
 */

#if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
# define __kernel_insbl(val, shift)	__builtin_alpha_insbl(val, shift)
# define __kernel_inswl(val, shift)	__builtin_alpha_inswl(val, shift)
# define __kernel_insql(val, shift)	__builtin_alpha_insql(val, shift)
# define __kernel_inslh(val, shift)	__builtin_alpha_inslh(val, shift)
# define __kernel_extbl(val, shift)	__builtin_alpha_extbl(val, shift)
# define __kernel_extwl(val, shift)	__builtin_alpha_extwl(val, shift)
# define __kernel_cmpbge(a, b)		__builtin_alpha_cmpbge(a, b)
#else
# define __kernel_insbl(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("insbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_inswl(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("inswl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_insql(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("insql %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_inslh(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("inslh %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_extbl(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("extbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_extwl(val, shift)					\
  ({ unsigned long __kir;						\
     __asm__("extwl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val));	\
     __kir; })
# define __kernel_cmpbge(a, b)						\
  ({ unsigned long __kir;						\
     __asm__("cmpbge %r2,%1,%0" : "=r"(__kir) : "rI"(b), "rJ"(a));	\
     __kir; })
#endif

#ifdef __alpha_cix__
# if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
#  define __kernel_cttz(x)		__builtin_ctzl(x)
#  define __kernel_ctlz(x)		__builtin_clzl(x)
#  define __kernel_ctpop(x)		__builtin_popcountl(x)
# else
#  define __kernel_cttz(x)						\
   ({ unsigned long __kir;						\
      __asm__("cttz %1,%0" : "=r"(__kir) : "r"(x));			\
      __kir; })
#  define __kernel_ctlz(x)						\
   ({ unsigned long __kir;						\
      __asm__("ctlz %1,%0" : "=r"(__kir) : "r"(x));			\
      __kir; })
#  define __kernel_ctpop(x)						\
   ({ unsigned long __kir;						\
      __asm__("ctpop %1,%0" : "=r"(__kir) : "r"(x));			\
      __kir; })
# endif
#else
# define __kernel_cttz(x)						\
  ({ unsigned long __kir;						\
     __asm__(".arch ev67; cttz %1,%0" : "=r"(__kir) : "r"(x));		\
     __kir; })
# define __kernel_ctlz(x)						\
  ({ unsigned long __kir;						\
     __asm__(".arch ev67; ctlz %1,%0" : "=r"(__kir) : "r"(x));		\
     __kir; })
# define __kernel_ctpop(x)						\
  ({ unsigned long __kir;						\
     __asm__(".arch ev67; ctpop %1,%0" : "=r"(__kir) : "r"(x));		\
     __kir; })
#endif


/* 
 * Beginning with EGCS 1.1, GCC defines __alpha_bwx__ when the BWX 
 * extension is enabled.  Previous versions did not define anything
 * we could test during compilation -- too bad, so sad.
 */

#if defined(__alpha_bwx__)
#define __kernel_ldbu(mem)	(mem)
#define __kernel_ldwu(mem)	(mem)
#define __kernel_stb(val,mem)	((mem) = (val))
#define __kernel_stw(val,mem)	((mem) = (val))
#else
#define __kernel_ldbu(mem)				\
  ({ unsigned char __kir;				\
     __asm__(".arch ev56;				\
	      ldbu %0,%1" : "=r"(__kir) : "m"(mem));	\
     __kir; })
#define __kernel_ldwu(mem)				\
  ({ unsigned short __kir;				\
     __asm__(".arch ev56;				\
	      ldwu %0,%1" : "=r"(__kir) : "m"(mem));	\
     __kir; })
#define __kernel_stb(val,mem)				\
  __asm__(".arch ev56;					\
	   stb %1,%0" : "=m"(mem) : "r"(val))
#define __kernel_stw(val,mem)				\
  __asm__(".arch ev56;					\
	   stw %1,%0" : "=m"(mem) : "r"(val))
#endif

#ifdef __KERNEL__
/* Some idiots over in <linux/compiler.h> thought inline should imply
   always_inline.  This breaks stuff.  We'll include this file whenever
   we run into such problems.  */

#include <linux/compiler.h>
#undef inline
#undef __inline__
#undef __inline
#undef __always_inline
#define __always_inline		inline __attribute__((always_inline))

#endif /* __KERNEL__ */

#endif /* __ALPHA_COMPILER_H */