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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 5363 $ |
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9 | |||
10 | |||
11 | init_fpu: |
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12 | clts |
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13 | fninit |
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14 | |||
15 | bt [cpu_caps], CAPS_SSE |
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16 | jnc .no_SSE |
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17 | |||
18 | mov ebx, cr4 |
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19 | mov ecx, cr0 |
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20 | or ebx, CR4_OSFXSR+CR4_OSXMMEXPT |
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21 | mov cr4, ebx |
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22 | |||
23 | and ecx, not (CR0_MP+CR0_EM) |
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24 | or ecx, CR0_NE |
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25 | mov cr0, ecx |
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26 | |||
27 | mov dword [esp-4], SSE_INIT |
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28 | ldmxcsr [esp-4] |
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29 | |||
30 | xorps xmm0, xmm0 |
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31 | xorps xmm1, xmm1 |
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32 | xorps xmm2, xmm2 |
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33 | xorps xmm3, xmm3 |
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34 | xorps xmm4, xmm4 |
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35 | xorps xmm5, xmm5 |
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36 | xorps xmm6, xmm6 |
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37 | xorps xmm7, xmm7 |
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38 | fxsave [fpu_data] ;[eax] |
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39 | ret |
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40 | .no_SSE: |
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41 | mov ecx, cr0 |
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42 | and ecx, not CR0_EM |
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43 | or ecx, CR0_MP+CR0_NE |
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44 | mov cr0, ecx |
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45 | fnsave [fpu_data] |
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46 | ret |
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47 | |||
48 | ; param |
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49 | ; eax= 512 bytes memory area |
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50 | |||
51 | align 4 |
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52 | fpu_save: |
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53 | push ecx |
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54 | push esi |
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55 | push edi |
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56 | |||
57 | pushfd |
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58 | cli |
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59 | |||
60 | clts |
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61 | mov edi, eax |
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62 | |||
63 | mov ecx, [fpu_owner] |
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64 | mov esi, [CURRENT_TASK] |
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65 | cmp ecx, esi |
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66 | jne .save |
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67 | |||
68 | call save_context |
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69 | jmp .exit |
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70 | .save: |
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71 | mov [fpu_owner], esi |
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72 | |||
73 | shl ecx, 8 |
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74 | mov eax, [ecx+SLOT_BASE+APPDATA.fpu_state] |
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75 | |||
76 | call save_context |
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77 | |||
78 | shl esi, 8 |
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79 | mov esi, [esi+SLOT_BASE+APPDATA.fpu_state] |
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80 | mov ecx, 512/4 |
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81 | cld |
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82 | rep movsd |
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83 | fninit |
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84 | .exit: |
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85 | popfd |
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86 | pop edi |
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87 | pop esi |
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88 | pop ecx |
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89 | ret |
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90 | |||
91 | align 4 |
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92 | save_context: |
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93 | bt [cpu_caps], CAPS_SSE |
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94 | jnc .no_SSE |
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95 | |||
96 | fxsave [eax] |
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97 | ret |
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98 | .no_SSE: |
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99 | fnsave [eax] |
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100 | ret |
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101 | |||
102 | align 4 |
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103 | fpu_restore: |
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104 | push ecx |
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105 | push esi |
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106 | |||
107 | mov esi, eax |
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108 | |||
109 | pushfd |
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110 | cli |
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111 | |||
112 | mov ecx, [fpu_owner] |
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113 | mov eax, [CURRENT_TASK] |
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114 | cmp ecx, eax |
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115 | jne .copy |
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116 | |||
117 | clts |
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118 | bt [cpu_caps], CAPS_SSE |
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119 | jnc .no_SSE |
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120 | |||
121 | fxrstor [esi] |
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122 | popfd |
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123 | pop esi |
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124 | pop ecx |
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125 | ret |
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126 | .no_SSE: |
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127 | fnclex ;fix possible problems |
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128 | frstor [esi] |
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129 | popfd |
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130 | pop esi |
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131 | pop ecx |
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132 | ret |
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133 | .copy: |
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134 | shl eax, 8 |
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135 | mov edi, [eax+SLOT_BASE+APPDATA.fpu_state] |
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136 | mov ecx, 512/4 |
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137 | cld |
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138 | rep movsd |
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139 | popfd |
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140 | pop esi |
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141 | pop ecx |
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142 | ret |
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143 | |||
144 | align 4 |
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145 | except_7: ;#NM exception handler |
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146 | save_ring3_context |
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147 | clts |
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148 | mov ax, app_data; |
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149 | mov ds, ax |
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150 | mov es, ax |
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151 | |||
152 | mov ebx, [fpu_owner] |
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153 | cmp ebx, [CURRENT_TASK] |
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154 | je .exit |
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155 | |||
156 | shl ebx, 8 |
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157 | mov eax, [ebx+SLOT_BASE+APPDATA.fpu_state] |
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158 | bt [cpu_caps], CAPS_SSE |
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159 | jnc .no_SSE |
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160 | |||
161 | fxsave [eax] |
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162 | mov ebx, [CURRENT_TASK] |
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163 | mov [fpu_owner], ebx |
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164 | shl ebx, 8 |
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165 | mov eax, [ebx+SLOT_BASE+APPDATA.fpu_state] |
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166 | fxrstor [eax] |
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167 | .exit: |
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168 | restore_ring3_context |
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169 | iret |
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170 | |||
171 | .no_SSE: |
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172 | fnsave [eax] |
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173 | mov ebx, [CURRENT_TASK] |
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174 | mov [fpu_owner], ebx |
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175 | shl ebx, 8 |
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176 | mov eax, [ebx+SLOT_BASE+APPDATA.fpu_state] |
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177 | frstor [eax] |
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178 | restore_ring3_context |
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179 | iret |
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180 | |||
181 | iglobal |
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3534 | clevermous | 182 | fpu_owner dd 2 |
2288 | clevermous | 183 | endg |