1 | /* Native implementation of soft float functions */ |
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2 | #include <math.h> |
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3 | |
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4 | #if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS) |
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5 | #include <ieeefp.h> |
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6 | #define fabsf(f) ((float)fabs(f)) |
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7 | #else |
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8 | #include <fenv.h> |
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9 | #endif |
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10 | |
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11 | /* |
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12 | * Define some C99-7.12.3 classification macros and |
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13 | * some C99-.12.4 for Solaris systems OS less than 10, |
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14 | * or Solaris 10 systems running GCC 3.x or less. |
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15 | * Solaris 10 with GCC4 does not need these macros as they |
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16 | * are defined in <iso/math_c99.h> with a compiler directive |
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17 | */ |
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18 | #if defined(HOST_SOLARIS) && (( HOST_SOLARIS <= 9 ) || ( ( HOST_SOLARIS >= 10 ) && ( __GNUC__ <= 4) )) |
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19 | /* |
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20 | * C99 7.12.3 classification macros |
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21 | * and |
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22 | * C99 7.12.14 comparison macros |
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23 | * |
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24 | * ... do not work on Solaris 10 using GNU CC 3.4.x. |
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25 | * Try to workaround the missing / broken C99 math macros. |
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26 | */ |
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27 | |
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28 | #define isnormal(x) (fpclass(x) >= FP_NZERO) |
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29 | #define isgreater(x, y) ((!unordered(x, y)) && ((x) > (y))) |
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30 | #define isgreaterequal(x, y) ((!unordered(x, y)) && ((x) >= (y))) |
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31 | #define isless(x, y) ((!unordered(x, y)) && ((x) < (y))) |
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32 | #define islessequal(x, y) ((!unordered(x, y)) && ((x) <= (y))) |
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33 | #define isunordered(x,y) unordered(x, y) |
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34 | #endif |
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35 | |
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36 | typedef float float32; |
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37 | typedef double float64; |
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38 | #ifdef FLOATX80 |
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39 | typedef long double floatx80; |
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40 | #endif |
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41 | |
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42 | typedef union { |
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43 | float32 f; |
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44 | uint32_t i; |
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45 | } float32u; |
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46 | typedef union { |
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47 | float64 f; |
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48 | uint64_t i; |
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49 | } float64u; |
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50 | #ifdef FLOATX80 |
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51 | typedef union { |
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52 | floatx80 f; |
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53 | struct { |
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54 | uint64_t low; |
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55 | uint16_t high; |
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56 | } i; |
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57 | } floatx80u; |
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58 | #endif |
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59 | |
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60 | /*---------------------------------------------------------------------------- |
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61 | | Software IEC/IEEE floating-point rounding mode. |
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62 | *----------------------------------------------------------------------------*/ |
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63 | #if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS) |
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64 | enum { |
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65 | float_round_nearest_even = FP_RN, |
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66 | float_round_down = FP_RM, |
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67 | float_round_up = FP_RP, |
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68 | float_round_to_zero = FP_RZ |
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69 | }; |
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70 | #elif defined(__arm__) |
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71 | enum { |
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72 | float_round_nearest_even = 0, |
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73 | float_round_down = 1, |
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74 | float_round_up = 2, |
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75 | float_round_to_zero = 3 |
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76 | }; |
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77 | #else |
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78 | enum { |
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79 | float_round_nearest_even = FE_TONEAREST, |
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80 | float_round_down = FE_DOWNWARD, |
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81 | float_round_up = FE_UPWARD, |
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82 | float_round_to_zero = FE_TOWARDZERO |
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83 | }; |
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84 | #endif |
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85 | |
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86 | typedef struct float_status { |
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87 | signed char float_rounding_mode; |
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88 | #ifdef FLOATX80 |
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89 | signed char floatx80_rounding_precision; |
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90 | #endif |
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91 | } float_status; |
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92 | |
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93 | void set_float_rounding_mode(int val STATUS_PARAM); |
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94 | #ifdef FLOATX80 |
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95 | void set_floatx80_rounding_precision(int val STATUS_PARAM); |
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96 | #endif |
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97 | |
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98 | /*---------------------------------------------------------------------------- |
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99 | | Software IEC/IEEE integer-to-floating-point conversion routines. |
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100 | *----------------------------------------------------------------------------*/ |
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101 | float32 int32_to_float32( int STATUS_PARAM); |
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102 | float64 int32_to_float64( int STATUS_PARAM); |
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103 | #ifdef FLOATX80 |
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104 | floatx80 int32_to_floatx80( int STATUS_PARAM); |
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105 | #endif |
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106 | #ifdef FLOAT128 |
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107 | float128 int32_to_float128( int STATUS_PARAM); |
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108 | #endif |
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109 | float32 int64_to_float32( int64_t STATUS_PARAM); |
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110 | float64 int64_to_float64( int64_t STATUS_PARAM); |
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111 | #ifdef FLOATX80 |
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112 | floatx80 int64_to_floatx80( int64_t STATUS_PARAM); |
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113 | #endif |
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114 | #ifdef FLOAT128 |
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115 | float128 int64_to_float128( int64_t STATUS_PARAM); |
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116 | #endif |
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117 | |
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118 | /*---------------------------------------------------------------------------- |
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119 | | Software IEC/IEEE single-precision conversion routines. |
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120 | *----------------------------------------------------------------------------*/ |
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121 | int float32_to_int32( float32 STATUS_PARAM); |
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122 | int float32_to_int32_round_to_zero( float32 STATUS_PARAM); |
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123 | int64_t float32_to_int64( float32 STATUS_PARAM); |
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124 | int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM); |
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125 | float64 float32_to_float64( float32 STATUS_PARAM); |
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126 | #ifdef FLOATX80 |
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127 | floatx80 float32_to_floatx80( float32 STATUS_PARAM); |
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128 | #endif |
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129 | #ifdef FLOAT128 |
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130 | float128 float32_to_float128( float32 STATUS_PARAM); |
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131 | #endif |
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132 | |
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133 | /*---------------------------------------------------------------------------- |
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134 | | Software IEC/IEEE single-precision operations. |
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135 | *----------------------------------------------------------------------------*/ |
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136 | float32 float32_round_to_int( float32 STATUS_PARAM); |
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137 | INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM) |
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138 | { |
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139 | return a + b; |
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140 | } |
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141 | INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM) |
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142 | { |
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143 | return a - b; |
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144 | } |
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145 | INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM) |
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146 | { |
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147 | return a * b; |
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148 | } |
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149 | INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM) |
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150 | { |
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151 | return a / b; |
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152 | } |
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153 | float32 float32_rem( float32, float32 STATUS_PARAM); |
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154 | float32 float32_sqrt( float32 STATUS_PARAM); |
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155 | INLINE char float32_eq( float32 a, float32 b STATUS_PARAM) |
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156 | { |
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157 | return a == b; |
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158 | } |
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159 | INLINE char float32_le( float32 a, float32 b STATUS_PARAM) |
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160 | { |
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161 | return a <= b; |
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162 | } |
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163 | INLINE char float32_lt( float32 a, float32 b STATUS_PARAM) |
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164 | { |
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165 | return a < b; |
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166 | } |
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167 | INLINE char float32_eq_signaling( float32 a, float32 b STATUS_PARAM) |
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168 | { |
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169 | return a <= b && a >= b; |
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170 | } |
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171 | INLINE char float32_le_quiet( float32 a, float32 b STATUS_PARAM) |
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172 | { |
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173 | return islessequal(a, b); |
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174 | } |
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175 | INLINE char float32_lt_quiet( float32 a, float32 b STATUS_PARAM) |
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176 | { |
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177 | return isless(a, b); |
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178 | } |
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179 | INLINE char float32_unordered( float32 a, float32 b STATUS_PARAM) |
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180 | { |
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181 | return isunordered(a, b); |
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182 | |
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183 | } |
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184 | char float32_compare( float32, float32 STATUS_PARAM ); |
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185 | char float32_compare_quiet( float32, float32 STATUS_PARAM ); |
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186 | char float32_is_signaling_nan( float32 ); |
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187 | |
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188 | INLINE float32 float32_abs(float32 a) |
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189 | { |
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190 | return fabsf(a); |
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191 | } |
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192 | |
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193 | INLINE float32 float32_chs(float32 a) |
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194 | { |
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195 | return -a; |
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196 | } |
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197 | |
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198 | /*---------------------------------------------------------------------------- |
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199 | | Software IEC/IEEE double-precision conversion routines. |
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200 | *----------------------------------------------------------------------------*/ |
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201 | int float64_to_int32( float64 STATUS_PARAM ); |
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202 | int float64_to_int32_round_to_zero( float64 STATUS_PARAM ); |
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203 | int64_t float64_to_int64( float64 STATUS_PARAM ); |
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204 | int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM ); |
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205 | float32 float64_to_float32( float64 STATUS_PARAM ); |
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206 | #ifdef FLOATX80 |
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207 | floatx80 float64_to_floatx80( float64 STATUS_PARAM ); |
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208 | #endif |
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209 | #ifdef FLOAT128 |
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210 | float128 float64_to_float128( float64 STATUS_PARAM ); |
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211 | #endif |
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212 | |
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213 | /*---------------------------------------------------------------------------- |
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214 | | Software IEC/IEEE double-precision operations. |
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215 | *----------------------------------------------------------------------------*/ |
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216 | float64 float64_round_to_int( float64 STATUS_PARAM ); |
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217 | INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM) |
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218 | { |
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219 | return a + b; |
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220 | } |
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221 | INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM) |
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222 | { |
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223 | return a - b; |
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224 | } |
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225 | INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM) |
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226 | { |
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227 | return a * b; |
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228 | } |
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229 | INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM) |
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230 | { |
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231 | return a / b; |
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232 | } |
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233 | float64 float64_rem( float64, float64 STATUS_PARAM ); |
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234 | float64 float64_sqrt( float64 STATUS_PARAM ); |
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235 | INLINE char float64_eq( float64 a, float64 b STATUS_PARAM) |
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236 | { |
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237 | return a == b; |
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238 | } |
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239 | INLINE char float64_le( float64 a, float64 b STATUS_PARAM) |
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240 | { |
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241 | return a <= b; |
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242 | } |
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243 | INLINE char float64_lt( float64 a, float64 b STATUS_PARAM) |
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244 | { |
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245 | return a < b; |
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246 | } |
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247 | INLINE char float64_eq_signaling( float64 a, float64 b STATUS_PARAM) |
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248 | { |
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249 | return a <= b && a >= b; |
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250 | } |
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251 | INLINE char float64_le_quiet( float64 a, float64 b STATUS_PARAM) |
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252 | { |
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253 | return islessequal(a, b); |
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254 | } |
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255 | INLINE char float64_lt_quiet( float64 a, float64 b STATUS_PARAM) |
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256 | { |
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257 | return isless(a, b); |
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258 | |
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259 | } |
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260 | INLINE char float64_unordered( float64 a, float64 b STATUS_PARAM) |
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261 | { |
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262 | return isunordered(a, b); |
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263 | |
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264 | } |
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265 | char float64_compare( float64, float64 STATUS_PARAM ); |
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266 | char float64_compare_quiet( float64, float64 STATUS_PARAM ); |
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267 | char float64_is_signaling_nan( float64 ); |
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268 | |
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269 | INLINE float64 float64_abs(float64 a) |
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270 | { |
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271 | return fabs(a); |
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272 | } |
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273 | |
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274 | INLINE float64 float64_chs(float64 a) |
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275 | { |
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276 | return -a; |
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277 | } |
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278 | |
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279 | #ifdef FLOATX80 |
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280 | |
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281 | /*---------------------------------------------------------------------------- |
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282 | | Software IEC/IEEE extended double-precision conversion routines. |
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283 | *----------------------------------------------------------------------------*/ |
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284 | int floatx80_to_int32( floatx80 STATUS_PARAM ); |
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285 | int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); |
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286 | int64_t floatx80_to_int64( floatx80 STATUS_PARAM); |
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287 | int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM); |
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288 | float32 floatx80_to_float32( floatx80 STATUS_PARAM ); |
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289 | float64 floatx80_to_float64( floatx80 STATUS_PARAM ); |
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290 | #ifdef FLOAT128 |
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291 | float128 floatx80_to_float128( floatx80 STATUS_PARAM ); |
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292 | #endif |
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293 | |
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294 | /*---------------------------------------------------------------------------- |
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295 | | Software IEC/IEEE extended double-precision operations. |
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296 | *----------------------------------------------------------------------------*/ |
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297 | floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); |
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298 | INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM) |
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299 | { |
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300 | return a + b; |
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301 | } |
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302 | INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM) |
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303 | { |
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304 | return a - b; |
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305 | } |
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306 | INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM) |
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307 | { |
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308 | return a * b; |
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309 | } |
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310 | INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM) |
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311 | { |
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312 | return a / b; |
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313 | } |
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314 | floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); |
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315 | floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); |
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316 | INLINE char floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM) |
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317 | { |
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318 | return a == b; |
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319 | } |
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320 | INLINE char floatx80_le( floatx80 a, floatx80 b STATUS_PARAM) |
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321 | { |
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322 | return a <= b; |
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323 | } |
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324 | INLINE char floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM) |
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325 | { |
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326 | return a < b; |
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327 | } |
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328 | INLINE char floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM) |
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329 | { |
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330 | return a <= b && a >= b; |
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331 | } |
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332 | INLINE char floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM) |
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333 | { |
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334 | return islessequal(a, b); |
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335 | } |
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336 | INLINE char floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM) |
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337 | { |
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338 | return isless(a, b); |
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339 | |
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340 | } |
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341 | INLINE char floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM) |
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342 | { |
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343 | return isunordered(a, b); |
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344 | |
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345 | } |
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346 | char floatx80_compare( floatx80, floatx80 STATUS_PARAM ); |
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347 | char floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM ); |
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348 | char floatx80_is_signaling_nan( floatx80 ); |
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349 | |
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350 | INLINE floatx80 floatx80_abs(floatx80 a) |
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351 | { |
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352 | return fabsl(a); |
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353 | } |
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354 | |
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355 | INLINE floatx80 floatx80_chs(floatx80 a) |
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356 | { |
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357 | return -a; |
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358 | } |
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359 | #endif |
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