1 | /* Native implementation of soft float functions. Only a single status
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2 | context is supported */
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3 | #include "softfloat.h"
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4 | #include <math.h>
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5 |
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6 | void set_float_rounding_mode(int val STATUS_PARAM)
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7 | {
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8 | STATUS(float_rounding_mode) = val;
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9 | #if defined(_BSD) && !defined(__APPLE__) || (defined(HOST_SOLARIS) && (HOST_SOLARIS < 10 || HOST_SOLARIS == 11))
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10 | fpsetround(val);
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11 | #elif defined(__arm__)
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12 | /* nothing to do */
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13 | #else
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14 | fesetround(val);
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15 | #endif
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16 | }
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17 |
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18 | #ifdef FLOATX80
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19 | void set_floatx80_rounding_precision(int val STATUS_PARAM)
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20 | {
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21 | STATUS(floatx80_rounding_precision) = val;
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22 | }
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23 | #endif
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24 |
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25 | #if defined(_BSD) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
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26 | #define lrint(d) ((int32_t)rint(d))
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27 | #define llrint(d) ((int64_t)rint(d))
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28 | #define lrintf(f) ((int32_t)rint(f))
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29 | #define llrintf(f) ((int64_t)rint(f))
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30 | #define sqrtf(f) ((float)sqrt(f))
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31 | #define remainderf(fa, fb) ((float)remainder(fa, fb))
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32 | #define rintf(f) ((float)rint(f))
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33 | /* Some defines which only apply to *BSD */
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34 | # if defined(VBOX) && defined(_BSD)
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35 | # define lrintl(f) ((int32_t)rint(f))
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36 | # define llrintl(f) ((int64_t)rint(f))
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37 | # define rintl(d) ((int32_t)rint(d))
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38 | # define sqrtl(f) (sqrt(f))
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39 | # define remainderl(fa, fb) (remainder(fa, fb))
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40 | # endif /* VBOX && _BSD */
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41 |
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42 | #if !defined(__sparc__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10
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43 | extern long double rintl(long double);
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44 | extern long double scalbnl(long double, int);
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45 |
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46 | long long
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47 | llrintl(long double x) {
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48 | return ((long long) rintl(x));
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49 | }
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50 |
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51 | long
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52 | lrintl(long double x) {
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53 | return ((long) rintl(x));
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54 | }
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55 |
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56 | long double
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57 | ldexpl(long double x, int n) {
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58 | return (scalbnl(x, n));
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59 | }
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60 | #endif
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61 | #endif
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62 |
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63 | #if defined(_ARCH_PPC)
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64 |
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65 | /* correct (but slow) PowerPC rint() (glibc version is incorrect) */
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66 | static double qemu_rint(double x)
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67 | {
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68 | double y = 4503599627370496.0;
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69 | if (fabs(x) >= y)
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70 | return x;
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71 | if (x < 0)
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72 | y = -y;
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73 | y = (x + y) - y;
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74 | if (y == 0.0)
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75 | y = copysign(y, x);
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76 | return y;
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77 | }
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78 |
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79 | #define rint qemu_rint
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80 | #endif
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81 |
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82 | /*----------------------------------------------------------------------------
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83 | | Software IEC/IEEE integer-to-floating-point conversion routines.
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84 | *----------------------------------------------------------------------------*/
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85 | float32 int32_to_float32(int v STATUS_PARAM)
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86 | {
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87 | return (float32)v;
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88 | }
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89 |
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90 | float32 uint32_to_float32(unsigned int v STATUS_PARAM)
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91 | {
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92 | return (float32)v;
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93 | }
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94 |
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95 | float64 int32_to_float64(int v STATUS_PARAM)
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96 | {
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97 | return (float64)v;
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98 | }
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99 |
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100 | float64 uint32_to_float64(unsigned int v STATUS_PARAM)
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101 | {
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102 | return (float64)v;
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103 | }
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104 |
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105 | #ifdef FLOATX80
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106 | floatx80 int32_to_floatx80(int v STATUS_PARAM)
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107 | {
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108 | return (floatx80)v;
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109 | }
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110 | #endif
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111 | float32 int64_to_float32( int64_t v STATUS_PARAM)
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112 | {
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113 | return (float32)v;
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114 | }
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115 | float32 uint64_to_float32( uint64_t v STATUS_PARAM)
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116 | {
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117 | return (float32)v;
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118 | }
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119 | float64 int64_to_float64( int64_t v STATUS_PARAM)
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120 | {
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121 | return (float64)v;
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122 | }
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123 | float64 uint64_to_float64( uint64_t v STATUS_PARAM)
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124 | {
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125 | return (float64)v;
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126 | }
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127 | #ifdef FLOATX80
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128 | floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
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129 | {
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130 | return (floatx80)v;
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131 | }
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132 | #endif
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133 |
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134 | /* XXX: this code implements the x86 behaviour, not the IEEE one. */
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135 | #if HOST_LONG_BITS == 32
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136 | static inline int long_to_int32(long a)
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137 | {
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138 | return a;
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139 | }
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140 | #else
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141 | static inline int long_to_int32(long a)
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142 | {
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143 | if (a != (int32_t)a)
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144 | a = 0x80000000;
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145 | return a;
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146 | }
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147 | #endif
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148 |
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149 | /*----------------------------------------------------------------------------
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150 | | Software IEC/IEEE single-precision conversion routines.
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151 | *----------------------------------------------------------------------------*/
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152 | int float32_to_int32( float32 a STATUS_PARAM)
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153 | {
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154 | return long_to_int32(lrintf(a));
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155 | }
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156 | int float32_to_int32_round_to_zero( float32 a STATUS_PARAM)
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157 | {
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158 | return (int)a;
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159 | }
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160 | int64_t float32_to_int64( float32 a STATUS_PARAM)
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161 | {
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162 | return llrintf(a);
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163 | }
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164 |
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165 | int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM)
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166 | {
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167 | return (int64_t)a;
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168 | }
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169 |
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170 | float64 float32_to_float64( float32 a STATUS_PARAM)
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171 | {
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172 | return a;
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173 | }
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174 | #ifdef FLOATX80
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175 | floatx80 float32_to_floatx80( float32 a STATUS_PARAM)
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176 | {
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177 | return a;
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178 | }
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179 | #endif
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180 |
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181 | unsigned int float32_to_uint32( float32 a STATUS_PARAM)
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182 | {
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183 | int64_t v;
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184 | unsigned int res;
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185 |
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186 | v = llrintf(a);
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187 | if (v < 0) {
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188 | res = 0;
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189 | } else if (v > 0xffffffff) {
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190 | res = 0xffffffff;
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191 | } else {
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192 | res = v;
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193 | }
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194 | return res;
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195 | }
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196 | unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM)
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197 | {
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198 | int64_t v;
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199 | unsigned int res;
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200 |
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201 | v = (int64_t)a;
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202 | if (v < 0) {
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203 | res = 0;
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204 | } else if (v > 0xffffffff) {
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205 | res = 0xffffffff;
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206 | } else {
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207 | res = v;
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208 | }
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209 | return res;
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210 | }
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211 |
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212 | /*----------------------------------------------------------------------------
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213 | | Software IEC/IEEE single-precision operations.
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214 | *----------------------------------------------------------------------------*/
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215 | float32 float32_round_to_int( float32 a STATUS_PARAM)
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216 | {
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217 | return rintf(a);
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218 | }
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219 |
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220 | float32 float32_rem( float32 a, float32 b STATUS_PARAM)
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221 | {
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222 | return remainderf(a, b);
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223 | }
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224 |
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225 | float32 float32_sqrt( float32 a STATUS_PARAM)
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226 | {
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227 | return sqrtf(a);
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228 | }
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229 | int float32_compare( float32 a, float32 b STATUS_PARAM )
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230 | {
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231 | if (a < b) {
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232 | return float_relation_less;
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233 | } else if (a == b) {
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234 | return float_relation_equal;
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235 | } else if (a > b) {
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236 | return float_relation_greater;
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237 | } else {
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238 | return float_relation_unordered;
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239 | }
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240 | }
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241 | int float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
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242 | {
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243 | if (isless(a, b)) {
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244 | return float_relation_less;
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245 | } else if (a == b) {
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246 | return float_relation_equal;
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247 | } else if (isgreater(a, b)) {
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248 | return float_relation_greater;
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249 | } else {
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250 | return float_relation_unordered;
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251 | }
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252 | }
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253 | int float32_is_signaling_nan( float32 a1)
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254 | {
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255 | float32u u;
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256 | uint32_t a;
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257 | u.f = a1;
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258 | a = u.i;
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259 | return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
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260 | }
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261 |
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262 | int float32_is_nan( float32 a1 )
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263 | {
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264 | float32u u;
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265 | uint64_t a;
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266 | u.f = a1;
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267 | a = u.i;
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268 | return ( 0xFF800000 < ( a<<1 ) );
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269 | }
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270 |
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271 | /*----------------------------------------------------------------------------
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272 | | Software IEC/IEEE double-precision conversion routines.
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273 | *----------------------------------------------------------------------------*/
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274 | int float64_to_int32( float64 a STATUS_PARAM)
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275 | {
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276 | return long_to_int32(lrint(a));
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277 | }
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278 | int float64_to_int32_round_to_zero( float64 a STATUS_PARAM)
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279 | {
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280 | return (int)a;
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281 | }
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282 | int64_t float64_to_int64( float64 a STATUS_PARAM)
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283 | {
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284 | return llrint(a);
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285 | }
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286 | int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM)
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287 | {
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288 | return (int64_t)a;
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289 | }
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290 | float32 float64_to_float32( float64 a STATUS_PARAM)
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291 | {
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292 | return a;
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293 | }
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294 | #ifdef FLOATX80
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295 | floatx80 float64_to_floatx80( float64 a STATUS_PARAM)
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296 | {
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297 | return a;
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298 | }
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299 | #endif
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300 | #ifdef FLOAT128
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301 | float128 float64_to_float128( float64 a STATUS_PARAM)
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302 | {
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303 | return a;
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304 | }
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305 | #endif
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306 |
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307 | unsigned int float64_to_uint32( float64 a STATUS_PARAM)
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308 | {
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309 | int64_t v;
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310 | unsigned int res;
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311 |
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312 | v = llrint(a);
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313 | if (v < 0) {
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314 | res = 0;
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315 | } else if (v > 0xffffffff) {
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316 | res = 0xffffffff;
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317 | } else {
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318 | res = v;
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319 | }
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320 | return res;
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321 | }
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322 | unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM)
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323 | {
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324 | int64_t v;
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325 | unsigned int res;
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326 |
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327 | v = (int64_t)a;
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328 | if (v < 0) {
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329 | res = 0;
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330 | } else if (v > 0xffffffff) {
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331 | res = 0xffffffff;
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332 | } else {
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333 | res = v;
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334 | }
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335 | return res;
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336 | }
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337 | uint64_t float64_to_uint64 (float64 a STATUS_PARAM)
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338 | {
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339 | int64_t v;
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340 |
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341 | v = llrint(a + (float64)INT64_MIN);
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342 |
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343 | return v - INT64_MIN;
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344 | }
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345 | uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM)
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346 | {
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347 | int64_t v;
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348 |
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349 | v = (int64_t)(a + (float64)INT64_MIN);
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350 |
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351 | return v - INT64_MIN;
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352 | }
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353 |
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354 | /*----------------------------------------------------------------------------
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355 | | Software IEC/IEEE double-precision operations.
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356 | *----------------------------------------------------------------------------*/
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357 | #if defined(__sun__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10
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358 | static inline float64 trunc(float64 x)
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359 | {
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360 | return x < 0 ? -floor(-x) : floor(x);
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361 | }
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362 | #endif
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363 | float64 float64_trunc_to_int( float64 a STATUS_PARAM )
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364 | {
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365 | return trunc(a);
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366 | }
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367 |
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368 | float64 float64_round_to_int( float64 a STATUS_PARAM )
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369 | {
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370 | #if defined(__arm__)
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371 | switch(STATUS(float_rounding_mode)) {
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372 | default:
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373 | case float_round_nearest_even:
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374 | asm("rndd %0, %1" : "=f" (a) : "f"(a));
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375 | break;
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376 | case float_round_down:
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377 | asm("rnddm %0, %1" : "=f" (a) : "f"(a));
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378 | break;
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379 | case float_round_up:
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380 | asm("rnddp %0, %1" : "=f" (a) : "f"(a));
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381 | break;
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382 | case float_round_to_zero:
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383 | asm("rnddz %0, %1" : "=f" (a) : "f"(a));
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384 | break;
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385 | }
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386 | #else
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387 | return rint(a);
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388 | #endif
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389 | }
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390 |
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391 | float64 float64_rem( float64 a, float64 b STATUS_PARAM)
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392 | {
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393 | return remainder(a, b);
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394 | }
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395 |
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396 | float64 float64_sqrt( float64 a STATUS_PARAM)
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397 | {
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398 | return sqrt(a);
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399 | }
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400 | int float64_compare( float64 a, float64 b STATUS_PARAM )
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401 | {
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402 | if (a < b) {
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403 | return float_relation_less;
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404 | } else if (a == b) {
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405 | return float_relation_equal;
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406 | } else if (a > b) {
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407 | return float_relation_greater;
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408 | } else {
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409 | return float_relation_unordered;
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410 | }
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411 | }
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412 | int float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
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413 | {
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414 | if (isless(a, b)) {
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415 | return float_relation_less;
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416 | } else if (a == b) {
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417 | return float_relation_equal;
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418 | } else if (isgreater(a, b)) {
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419 | return float_relation_greater;
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420 | } else {
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421 | return float_relation_unordered;
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422 | }
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423 | }
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424 | int float64_is_signaling_nan( float64 a1)
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425 | {
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426 | float64u u;
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427 | uint64_t a;
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428 | u.f = a1;
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429 | a = u.i;
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430 | return
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431 | ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
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432 | && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
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433 |
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434 | }
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435 |
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436 | int float64_is_nan( float64 a1 )
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437 | {
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438 | float64u u;
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439 | uint64_t a;
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440 | u.f = a1;
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441 | a = u.i;
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442 |
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443 | return ( LIT64( 0xFFF0000000000000 ) < (bits64) ( a<<1 ) );
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444 |
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445 | }
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446 |
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447 | #ifdef FLOATX80
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448 |
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449 | /*----------------------------------------------------------------------------
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450 | | Software IEC/IEEE extended double-precision conversion routines.
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451 | *----------------------------------------------------------------------------*/
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452 | int floatx80_to_int32( floatx80 a STATUS_PARAM)
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453 | {
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454 | return long_to_int32(lrintl(a));
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455 | }
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456 | int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
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457 | {
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458 | return (int)a;
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459 | }
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460 | int64_t floatx80_to_int64( floatx80 a STATUS_PARAM)
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461 | {
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462 | return llrintl(a);
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463 | }
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464 | int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM)
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465 | {
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466 | return (int64_t)a;
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467 | }
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468 | float32 floatx80_to_float32( floatx80 a STATUS_PARAM)
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469 | {
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470 | return a;
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471 | }
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472 | float64 floatx80_to_float64( floatx80 a STATUS_PARAM)
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473 | {
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474 | return a;
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475 | }
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476 |
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477 | /*----------------------------------------------------------------------------
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478 | | Software IEC/IEEE extended double-precision operations.
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479 | *----------------------------------------------------------------------------*/
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480 | floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM)
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481 | {
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482 | return rintl(a);
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483 | }
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484 | floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM)
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485 | {
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486 | return remainderl(a, b);
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487 | }
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488 | floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM)
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489 | {
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490 | return sqrtl(a);
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491 | }
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492 | int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
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493 | {
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494 | if (a < b) {
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495 | return float_relation_less;
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496 | } else if (a == b) {
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497 | return float_relation_equal;
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498 | } else if (a > b) {
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499 | return float_relation_greater;
|
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500 | } else {
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501 | return float_relation_unordered;
|
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502 | }
|
---|
503 | }
|
---|
504 | int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
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505 | {
|
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506 | if (isless(a, b)) {
|
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507 | return float_relation_less;
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508 | } else if (a == b) {
|
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509 | return float_relation_equal;
|
---|
510 | } else if (isgreater(a, b)) {
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511 | return float_relation_greater;
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512 | } else {
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513 | return float_relation_unordered;
|
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514 | }
|
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515 | }
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516 | int floatx80_is_signaling_nan( floatx80 a1)
|
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517 | {
|
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518 | floatx80u u;
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519 | uint64_t aLow;
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520 | u.f = a1;
|
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521 |
|
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522 | aLow = u.i.low & ~ LIT64( 0x4000000000000000 );
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---|
523 | return
|
---|
524 | ( ( u.i.high & 0x7FFF ) == 0x7FFF )
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525 | && (bits64) ( aLow<<1 )
|
---|
526 | && ( u.i.low == aLow );
|
---|
527 | }
|
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528 |
|
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529 | int floatx80_is_nan( floatx80 a1 )
|
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530 | {
|
---|
531 | floatx80u u;
|
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532 | u.f = a1;
|
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533 | return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );
|
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534 | }
|
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535 |
|
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536 | #endif
|
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