1 | #ifndef _ASM_IA64_INTRINSICS_H |
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2 | #define _ASM_IA64_INTRINSICS_H |
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3 | |
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4 | /* |
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5 | * Compiler-dependent intrinsics. |
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6 | * |
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7 | * Copyright (C) 2002-2003 Hewlett-Packard Co |
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8 | * David Mosberger-Tang <davidm@hpl.hp.com> |
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9 | */ |
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10 | |
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11 | #ifndef __ASSEMBLY__ |
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12 | #include <linux/config.h> |
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13 | |
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14 | /* include compiler specific intrinsics */ |
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15 | #include <asm/ia64regs.h> |
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16 | #ifdef __INTEL_COMPILER |
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17 | # include <asm/intel_intrin.h> |
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18 | #else |
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19 | # include <asm/gcc_intrin.h> |
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20 | #endif |
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21 | |
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22 | /* |
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23 | * Force an unresolved reference if someone tries to use |
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24 | * ia64_fetch_and_add() with a bad value. |
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25 | */ |
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26 | extern unsigned long __bad_size_for_ia64_fetch_and_add (void); |
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27 | extern unsigned long __bad_increment_for_ia64_fetch_and_add (void); |
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28 | |
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29 | #define IA64_FETCHADD(tmp,v,n,sz,sem) \ |
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30 | ({ \ |
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31 | switch (sz) { \ |
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32 | case 4: \ |
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33 | tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \ |
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34 | break; \ |
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35 | \ |
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36 | case 8: \ |
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37 | tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \ |
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38 | break; \ |
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39 | \ |
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40 | default: \ |
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41 | __bad_size_for_ia64_fetch_and_add(); \ |
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42 | } \ |
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43 | }) |
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44 | |
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45 | #define ia64_fetchadd(i,v,sem) \ |
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46 | ({ \ |
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47 | __u64 _tmp; \ |
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48 | volatile __typeof__(*(v)) *_v = (v); \ |
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49 | /* Can't use a switch () here: gcc isn't always smart enough for that... */ \ |
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50 | if ((i) == -16) \ |
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51 | IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem); \ |
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52 | else if ((i) == -8) \ |
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53 | IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \ |
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54 | else if ((i) == -4) \ |
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55 | IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \ |
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56 | else if ((i) == -1) \ |
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57 | IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \ |
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58 | else if ((i) == 1) \ |
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59 | IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \ |
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60 | else if ((i) == 4) \ |
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61 | IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \ |
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62 | else if ((i) == 8) \ |
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63 | IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \ |
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64 | else if ((i) == 16) \ |
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65 | IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \ |
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66 | else \ |
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67 | _tmp = __bad_increment_for_ia64_fetch_and_add(); \ |
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68 | (__typeof__(*(v))) (_tmp); /* return old value */ \ |
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69 | }) |
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70 | |
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71 | #define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */ |
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72 | |
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73 | /* |
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74 | * This function doesn't exist, so you'll get a linker error if |
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75 | * something tries to do an invalid xchg(). |
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76 | */ |
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77 | extern void ia64_xchg_called_with_bad_pointer (void); |
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78 | |
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79 | #define __xchg(x,ptr,size) \ |
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80 | ({ \ |
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81 | unsigned long __xchg_result; \ |
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82 | \ |
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83 | switch (size) { \ |
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84 | case 1: \ |
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85 | __xchg_result = ia64_xchg1((__u8 *)ptr, x); \ |
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86 | break; \ |
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87 | \ |
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88 | case 2: \ |
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89 | __xchg_result = ia64_xchg2((__u16 *)ptr, x); \ |
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90 | break; \ |
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91 | \ |
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92 | case 4: \ |
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93 | __xchg_result = ia64_xchg4((__u32 *)ptr, x); \ |
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94 | break; \ |
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95 | \ |
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96 | case 8: \ |
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97 | __xchg_result = ia64_xchg8((__u64 *)ptr, x); \ |
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98 | break; \ |
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99 | default: \ |
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100 | ia64_xchg_called_with_bad_pointer(); \ |
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101 | } \ |
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102 | __xchg_result; \ |
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103 | }) |
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104 | |
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105 | #define xchg(ptr,x) \ |
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106 | ((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr)))) |
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107 | |
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108 | /* |
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109 | * Atomic compare and exchange. Compare OLD with MEM, if identical, |
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110 | * store NEW in MEM. Return the initial value in MEM. Success is |
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111 | * indicated by comparing RETURN with OLD. |
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112 | */ |
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113 | |
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114 | #define __HAVE_ARCH_CMPXCHG 1 |
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115 | |
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116 | /* |
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117 | * This function doesn't exist, so you'll get a linker error |
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118 | * if something tries to do an invalid cmpxchg(). |
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119 | */ |
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120 | extern long ia64_cmpxchg_called_with_bad_pointer (void); |
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121 | |
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122 | #define ia64_cmpxchg(sem,ptr,old,new,size) \ |
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123 | ({ \ |
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124 | __u64 _o_, _r_; \ |
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125 | \ |
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126 | switch (size) { \ |
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127 | case 1: _o_ = (__u8 ) (long) (old); break; \ |
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128 | case 2: _o_ = (__u16) (long) (old); break; \ |
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129 | case 4: _o_ = (__u32) (long) (old); break; \ |
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130 | case 8: _o_ = (__u64) (long) (old); break; \ |
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131 | default: break; \ |
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132 | } \ |
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133 | switch (size) { \ |
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134 | case 1: \ |
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135 | _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \ |
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136 | break; \ |
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137 | \ |
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138 | case 2: \ |
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139 | _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \ |
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140 | break; \ |
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141 | \ |
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142 | case 4: \ |
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143 | _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \ |
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144 | break; \ |
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145 | \ |
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146 | case 8: \ |
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147 | _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \ |
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148 | break; \ |
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149 | \ |
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150 | default: \ |
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151 | _r_ = ia64_cmpxchg_called_with_bad_pointer(); \ |
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152 | break; \ |
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153 | } \ |
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154 | (__typeof__(old)) _r_; \ |
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155 | }) |
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156 | |
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157 | #define cmpxchg_acq(ptr,o,n) ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr))) |
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158 | #define cmpxchg_rel(ptr,o,n) ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr))) |
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159 | |
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160 | /* for compatibility with other platforms: */ |
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161 | #define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n) |
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162 | |
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163 | #ifdef CONFIG_IA64_DEBUG_CMPXCHG |
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164 | # define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128; |
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165 | # define CMPXCHG_BUGCHECK(v) \ |
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166 | do { \ |
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167 | if (_cmpxchg_bugcheck_count-- <= 0) { \ |
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168 | void *ip; \ |
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169 | extern int printk(const char *fmt, ...); \ |
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170 | ip = (void *) ia64_getreg(_IA64_REG_IP); \ |
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171 | printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \ |
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172 | break; \ |
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173 | } \ |
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174 | } while (0) |
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175 | #else /* !CONFIG_IA64_DEBUG_CMPXCHG */ |
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176 | # define CMPXCHG_BUGCHECK_DECL |
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177 | # define CMPXCHG_BUGCHECK(v) |
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178 | #endif /* !CONFIG_IA64_DEBUG_CMPXCHG */ |
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179 | |
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180 | #endif |
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181 | #endif /* _ASM_IA64_INTRINSICS_H */ |
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