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1 /* |
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2 NetWinder Floating Point Emulator |
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3 (c) Rebel.COM, 1998,1999 |
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4 |
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5 Direct questions, comments to Scott Bambrough <scottb@netwinder.org> |
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6 |
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7 This program is free software; you can redistribute it and/or modify |
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8 it under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 2 of the License, or |
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10 (at your option) any later version. |
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11 |
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12 This program is distributed in the hope that it will be useful, |
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 GNU General Public License for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with this program; if not, write to the Free Software |
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19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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20 */ |
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21 |
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22 #include "fpa11.h" |
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23 #include "softfloat.h" |
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24 #include "fpopcode.h" |
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25 |
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26 floatx80 floatx80_exp(floatx80 Fm); |
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27 floatx80 floatx80_ln(floatx80 Fm); |
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28 floatx80 floatx80_sin(floatx80 rFm); |
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29 floatx80 floatx80_cos(floatx80 rFm); |
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30 floatx80 floatx80_arcsin(floatx80 rFm); |
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31 floatx80 floatx80_arctan(floatx80 rFm); |
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32 floatx80 floatx80_log(floatx80 rFm); |
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33 floatx80 floatx80_tan(floatx80 rFm); |
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34 floatx80 floatx80_arccos(floatx80 rFm); |
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35 floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm); |
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36 floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm); |
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37 |
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38 unsigned int ExtendedCPDO(const unsigned int opcode) |
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39 { |
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40 FPA11 *fpa11 = GET_FPA11(); |
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41 floatx80 rFm, rFn; |
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42 unsigned int Fd, Fm, Fn, nRc = 1; |
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43 |
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44 //printk("ExtendedCPDO(0x%08x)\n",opcode); |
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45 |
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46 Fm = getFm(opcode); |
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47 if (CONSTANT_FM(opcode)) |
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48 { |
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49 rFm = getExtendedConstant(Fm); |
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50 } |
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51 else |
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52 { |
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53 switch (fpa11->fType[Fm]) |
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54 { |
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55 case typeSingle: |
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56 rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status); |
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57 break; |
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58 |
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59 case typeDouble: |
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60 rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble, &fpa11->fp_status); |
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61 break; |
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62 |
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63 case typeExtended: |
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64 rFm = fpa11->fpreg[Fm].fExtended; |
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65 break; |
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66 |
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67 default: return 0; |
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68 } |
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69 } |
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70 |
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71 if (!MONADIC_INSTRUCTION(opcode)) |
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72 { |
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73 Fn = getFn(opcode); |
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74 switch (fpa11->fType[Fn]) |
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75 { |
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76 case typeSingle: |
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77 rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status); |
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78 break; |
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79 |
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80 case typeDouble: |
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81 rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble, &fpa11->fp_status); |
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82 break; |
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83 |
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84 case typeExtended: |
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85 rFn = fpa11->fpreg[Fn].fExtended; |
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86 break; |
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87 |
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88 default: return 0; |
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89 } |
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90 } |
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91 |
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92 Fd = getFd(opcode); |
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93 switch (opcode & MASK_ARITHMETIC_OPCODE) |
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94 { |
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95 /* dyadic opcodes */ |
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96 case ADF_CODE: |
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97 fpa11->fpreg[Fd].fExtended = floatx80_add(rFn,rFm, &fpa11->fp_status); |
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98 break; |
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99 |
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100 case MUF_CODE: |
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101 case FML_CODE: |
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102 fpa11->fpreg[Fd].fExtended = floatx80_mul(rFn,rFm, &fpa11->fp_status); |
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103 break; |
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104 |
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105 case SUF_CODE: |
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106 fpa11->fpreg[Fd].fExtended = floatx80_sub(rFn,rFm, &fpa11->fp_status); |
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107 break; |
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108 |
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109 case RSF_CODE: |
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110 fpa11->fpreg[Fd].fExtended = floatx80_sub(rFm,rFn, &fpa11->fp_status); |
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111 break; |
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112 |
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113 case DVF_CODE: |
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114 case FDV_CODE: |
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115 fpa11->fpreg[Fd].fExtended = floatx80_div(rFn,rFm, &fpa11->fp_status); |
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116 break; |
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117 |
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118 case RDF_CODE: |
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119 case FRD_CODE: |
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120 fpa11->fpreg[Fd].fExtended = floatx80_div(rFm,rFn, &fpa11->fp_status); |
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121 break; |
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122 |
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123 #if 0 |
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124 case POW_CODE: |
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125 fpa11->fpreg[Fd].fExtended = floatx80_pow(rFn,rFm); |
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126 break; |
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127 |
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128 case RPW_CODE: |
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129 fpa11->fpreg[Fd].fExtended = floatx80_pow(rFm,rFn); |
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130 break; |
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131 #endif |
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132 |
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133 case RMF_CODE: |
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134 fpa11->fpreg[Fd].fExtended = floatx80_rem(rFn,rFm, &fpa11->fp_status); |
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135 break; |
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136 |
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137 #if 0 |
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138 case POL_CODE: |
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139 fpa11->fpreg[Fd].fExtended = floatx80_pol(rFn,rFm); |
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140 break; |
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141 #endif |
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142 |
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143 /* monadic opcodes */ |
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144 case MVF_CODE: |
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145 fpa11->fpreg[Fd].fExtended = rFm; |
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146 break; |
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147 |
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148 case MNF_CODE: |
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149 rFm.high ^= 0x8000; |
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150 fpa11->fpreg[Fd].fExtended = rFm; |
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151 break; |
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152 |
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153 case ABS_CODE: |
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154 rFm.high &= 0x7fff; |
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155 fpa11->fpreg[Fd].fExtended = rFm; |
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156 break; |
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157 |
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158 case RND_CODE: |
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159 case URD_CODE: |
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160 fpa11->fpreg[Fd].fExtended = floatx80_round_to_int(rFm, &fpa11->fp_status); |
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161 break; |
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162 |
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163 case SQT_CODE: |
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164 fpa11->fpreg[Fd].fExtended = floatx80_sqrt(rFm, &fpa11->fp_status); |
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165 break; |
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166 |
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167 #if 0 |
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168 case LOG_CODE: |
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169 fpa11->fpreg[Fd].fExtended = floatx80_log(rFm); |
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170 break; |
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171 |
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172 case LGN_CODE: |
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173 fpa11->fpreg[Fd].fExtended = floatx80_ln(rFm); |
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174 break; |
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175 |
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176 case EXP_CODE: |
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177 fpa11->fpreg[Fd].fExtended = floatx80_exp(rFm); |
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178 break; |
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179 |
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180 case SIN_CODE: |
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181 fpa11->fpreg[Fd].fExtended = floatx80_sin(rFm); |
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182 break; |
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183 |
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184 case COS_CODE: |
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185 fpa11->fpreg[Fd].fExtended = floatx80_cos(rFm); |
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186 break; |
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187 |
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188 case TAN_CODE: |
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189 fpa11->fpreg[Fd].fExtended = floatx80_tan(rFm); |
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190 break; |
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191 |
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192 case ASN_CODE: |
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193 fpa11->fpreg[Fd].fExtended = floatx80_arcsin(rFm); |
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194 break; |
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195 |
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196 case ACS_CODE: |
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197 fpa11->fpreg[Fd].fExtended = floatx80_arccos(rFm); |
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198 break; |
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199 |
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200 case ATN_CODE: |
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201 fpa11->fpreg[Fd].fExtended = floatx80_arctan(rFm); |
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202 break; |
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203 #endif |
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204 |
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205 case NRM_CODE: |
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206 break; |
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207 |
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208 default: |
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209 { |
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210 nRc = 0; |
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211 } |
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212 } |
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213 |
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214 if (0 != nRc) fpa11->fType[Fd] = typeExtended; |
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215 return nRc; |
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216 } |
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217 |
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218 #if 0 |
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219 floatx80 floatx80_exp(floatx80 Fm) |
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220 { |
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221 //series |
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222 } |
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223 |
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224 floatx80 floatx80_ln(floatx80 Fm) |
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225 { |
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226 //series |
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227 } |
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228 |
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229 floatx80 floatx80_sin(floatx80 rFm) |
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230 { |
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231 //series |
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232 } |
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233 |
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234 floatx80 floatx80_cos(floatx80 rFm) |
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235 { |
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236 //series |
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237 } |
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238 |
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239 floatx80 floatx80_arcsin(floatx80 rFm) |
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240 { |
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241 //series |
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242 } |
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243 |
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244 floatx80 floatx80_arctan(floatx80 rFm) |
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245 { |
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246 //series |
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247 } |
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248 |
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249 floatx80 floatx80_log(floatx80 rFm) |
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250 { |
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251 return floatx80_div(floatx80_ln(rFm),getExtendedConstant(7)); |
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252 } |
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253 |
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254 floatx80 floatx80_tan(floatx80 rFm) |
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255 { |
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256 return floatx80_div(floatx80_sin(rFm),floatx80_cos(rFm)); |
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257 } |
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258 |
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259 floatx80 floatx80_arccos(floatx80 rFm) |
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260 { |
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261 //return floatx80_sub(halfPi,floatx80_arcsin(rFm)); |
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262 } |
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263 |
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264 floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm) |
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265 { |
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266 return floatx80_exp(floatx80_mul(rFm,floatx80_ln(rFn))); |
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267 } |
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268 |
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269 floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm) |
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270 { |
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271 return floatx80_arctan(floatx80_div(rFn,rFm)); |
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272 } |
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273 #endif |