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535 | cejka | 1 | /* |
2 | * Copyright (C) 2005 Josef Cejka |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include<softfloat.h> |
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647 | cejka | 30 | #include<sftypes.h> |
731 | cejka | 31 | |
32 | #include<add.h> |
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33 | #include<sub.h> |
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34 | #include<mul.h> |
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35 | #include<div.h> |
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36 | |||
647 | cejka | 37 | #include<conversion.h> |
38 | #include<comparison.h> |
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39 | #include<other.h> |
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535 | cejka | 40 | |
647 | cejka | 41 | /* Arithmetic functions */ |
542 | cejka | 42 | |
43 | float __addsf3(float a, float b) |
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44 | { |
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45 | float32 fa, fb; |
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563 | cejka | 46 | fa.f=a; |
47 | fb.f=b; |
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647 | cejka | 48 | if (fa.parts.sign!=fb.parts.sign) { |
49 | if (fa.parts.sign) { |
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50 | fa.parts.sign=0; |
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51 | return subFloat32(fb,fa).f; |
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52 | }; |
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53 | fb.parts.sign=0; |
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54 | return subFloat32(fa,fb).f; |
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55 | } |
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563 | cejka | 56 | return addFloat32(fa,fb).f; |
698 | cejka | 57 | } |
542 | cejka | 58 | |
734 | cejka | 59 | double __adddf3(double a, double b) |
60 | { |
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61 | float64 da, db; |
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62 | da.d=a; |
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63 | db.d=b; |
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64 | if (da.parts.sign!=db.parts.sign) { |
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65 | if (da.parts.sign) { |
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66 | da.parts.sign=0; |
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67 | return subFloat64(db,da).d; |
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68 | }; |
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69 | db.parts.sign=0; |
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70 | return subFloat64(da,db).d; |
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71 | } |
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72 | return addFloat64(da,db).d; |
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73 | } |
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74 | |||
542 | cejka | 75 | float __subsf3(float a, float b) |
76 | { |
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77 | float32 fa, fb; |
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563 | cejka | 78 | fa.f=a; |
79 | fb.f=b; |
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647 | cejka | 80 | if (fa.parts.sign!=fb.parts.sign) { |
660 | cejka | 81 | fb.parts.sign=!fb.parts.sign; |
647 | cejka | 82 | return addFloat32(fa,fb).f; |
83 | } |
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563 | cejka | 84 | return subFloat32(fa,fb).f; |
698 | cejka | 85 | } |
542 | cejka | 86 | |
734 | cejka | 87 | double __subdf3(double a, double b) |
88 | { |
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89 | float64 da, db; |
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90 | da.d = a; |
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91 | db.d = b; |
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92 | if (da.parts.sign != db.parts.sign) { |
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93 | db.parts.sign = !db.parts.sign; |
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94 | return addFloat64(da, db).d; |
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95 | } |
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96 | return subFloat64(da, db).d; |
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97 | } |
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98 | |||
688 | cejka | 99 | float __mulsf3(float a, float b) |
100 | { |
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101 | float32 fa, fb; |
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102 | fa.f=a; |
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103 | fb.f=b; |
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104 | return mulFloat32(fa, fb).f; |
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105 | } |
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106 | |||
737 | cejka | 107 | double __muldf3(double a, double b) |
108 | { |
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109 | float64 da, db; |
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110 | da.d = a; |
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111 | db.d = b; |
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112 | return mulFloat64(da, db).d; |
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113 | } |
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114 | |||
697 | cejka | 115 | float __divsf3(float a, float b) |
116 | { |
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117 | float32 fa, fb; |
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118 | fa.f=a; |
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119 | fb.f=b; |
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731 | cejka | 120 | //return divFloat32(fa, fb).f; |
698 | cejka | 121 | } |
697 | cejka | 122 | |
542 | cejka | 123 | float __negsf2(float a) |
124 | { |
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125 | float32 fa; |
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126 | fa.f=a; |
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127 | fa.parts.sign=!fa.parts.sign; |
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128 | return fa.f; |
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698 | cejka | 129 | } |
542 | cejka | 130 | |
131 | double __negdf2(double a) |
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132 | { |
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133 | float64 fa; |
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563 | cejka | 134 | fa.d=a; |
542 | cejka | 135 | fa.parts.sign=!fa.parts.sign; |
563 | cejka | 136 | return fa.d; |
698 | cejka | 137 | } |
542 | cejka | 138 | |
647 | cejka | 139 | /* Conversion functions */ |
542 | cejka | 140 | |
697 | cejka | 141 | double __extendsfdf2(float a) |
142 | { |
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143 | float32 fa; |
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144 | fa.f = a; |
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145 | return convertFloat32ToFloat64(fa).d; |
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698 | cejka | 146 | } |
697 | cejka | 147 | |
148 | float __truncdfsf2(double a) |
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149 | { |
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150 | float64 da; |
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151 | da.d = a; |
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152 | return convertFloat64ToFloat32(da).f; |
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153 | } |
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698 | cejka | 154 | |
647 | cejka | 155 | /* Comparison functions */ |
542 | cejka | 156 | |
652 | cejka | 157 | /* a<b .. -1 |
158 | * a=b .. 0 |
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159 | * a>b .. 1 |
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160 | * */ |
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161 | |||
660 | cejka | 162 | int __cmpsf2(float a, float b) |
652 | cejka | 163 | { |
164 | float32 fa,fb; |
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165 | fa.f=a; |
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166 | fb.f=b; |
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167 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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168 | return 1; /* no special constant for unordered - maybe signaled? */ |
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169 | }; |
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170 | |||
171 | |||
172 | if (isFloat32eq(fa,fb)) { |
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173 | return 0; |
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174 | }; |
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175 | |||
176 | if (isFloat32lt(fa,fb)) { |
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177 | return -1; |
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178 | }; |
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179 | return 1; |
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180 | } |
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181 | |||
182 | int __unordsf2(float a, float b) |
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183 | { |
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184 | float32 fa,fb; |
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185 | fa.f=a; |
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186 | fb.f=b; |
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187 | return ((isFloat32NaN(fa))||(isFloat32NaN(fb))); |
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698 | cejka | 188 | } |
652 | cejka | 189 | |
190 | /** |
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191 | * @return zero, if neither argument is a NaN and are equal |
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192 | * */ |
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193 | int __eqsf2(float a, float b) |
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194 | { |
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195 | float32 fa,fb; |
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196 | fa.f=a; |
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197 | fb.f=b; |
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198 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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199 | /* TODO: sigNaNs*/ |
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200 | return 1; |
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201 | }; |
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202 | return isFloat32eq(fa,fb)-1; |
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698 | cejka | 203 | } |
652 | cejka | 204 | |
205 | /* strange behavior, but it was in gcc documentation */ |
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206 | int __nesf2(float a, float b) |
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207 | { |
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208 | return __eqsf2(a,b); |
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698 | cejka | 209 | } |
653 | cejka | 210 | |
211 | /* return value >= 0 if a>=b and neither is NaN */ |
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212 | int __gesf2(float a, float b) |
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213 | { |
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214 | float32 fa,fb; |
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215 | fa.f=a; |
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216 | fb.f=b; |
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217 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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218 | /* TODO: sigNaNs*/ |
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660 | cejka | 219 | return -1; |
653 | cejka | 220 | }; |
221 | |||
222 | if (isFloat32eq(fa,fb)) { |
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223 | return 0; |
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224 | }; |
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225 | |||
226 | if (isFloat32gt(fa,fb)) { |
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227 | return 1; |
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228 | }; |
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229 | |||
230 | return -1; |
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231 | } |
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232 | |||
233 | /** Return negative value, if a<b and neither is NaN*/ |
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234 | int __ltsf2(float a, float b) |
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235 | { |
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236 | float32 fa,fb; |
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237 | fa.f=a; |
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238 | fb.f=b; |
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239 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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240 | /* TODO: sigNaNs*/ |
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241 | return 1; |
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242 | }; |
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243 | if (isFloat32lt(fa, fb)) { |
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244 | return -1; |
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245 | }; |
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246 | return 0; |
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247 | } |
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248 | |||
249 | /* return value <= 0 if a<=b and neither is NaN */ |
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250 | int __lesf2(float a, float b) |
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251 | { |
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252 | float32 fa,fb; |
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253 | fa.f=a; |
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254 | fb.f=b; |
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255 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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256 | /* TODO: sigNaNs*/ |
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257 | return 1; |
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258 | }; |
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259 | |||
260 | if (isFloat32eq(fa,fb)) { |
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261 | return 0; |
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262 | }; |
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263 | |||
264 | if (isFloat32lt(fa,fb)) { |
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265 | return -1; |
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266 | }; |
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267 | |||
268 | return 1; |
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269 | } |
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270 | |||
271 | /** Return positive value, if a>b and neither is NaN*/ |
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660 | cejka | 272 | int __gtsf2(float a, float b) |
653 | cejka | 273 | { |
274 | float32 fa,fb; |
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275 | fa.f=a; |
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276 | fb.f=b; |
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277 | if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) { |
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278 | /* TODO: sigNaNs*/ |
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660 | cejka | 279 | return -1; |
653 | cejka | 280 | }; |
281 | if (isFloat32gt(fa, fb)) { |
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282 | return 1; |
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283 | }; |
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284 | return 0; |
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285 | } |
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286 | |||
647 | cejka | 287 | /* Other functions */ |
542 | cejka | 288 | |
698 | cejka | 289 | float __powisf2(float a, int b) |
290 | { |
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291 | //TODO: |
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292 | } |
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293 | |||
294 | float __mulsc3(float a, float b, float c, float d) |
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295 | { |
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296 | //TODO: |
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297 | } |
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298 | |||
299 | float __divsc3(float a, float b, float c, float d) |
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300 | { |
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301 | //TODO: |
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302 | } |
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303 |