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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2465 | Serge | 3 | ;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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214 | serge | 7 | |
593 | mikedld | 8 | $Revision: 3555 $ |
9 | |||
10 | |||
214 | serge | 11 | init_fpu: |
2434 | Serge | 12 | clts |
13 | fninit |
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214 | serge | 14 | |
2434 | Serge | 15 | bt [cpu_caps], CAPS_SSE |
16 | jnc .no_SSE |
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214 | serge | 17 | |
2434 | Serge | 18 | mov ebx, cr4 |
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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214 | serge | 22 | |
2434 | Serge | 23 | and ecx, not (CR0_MP+CR0_EM) |
24 | or ecx, CR0_NE |
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25 | mov cr0, ecx |
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214 | serge | 26 | |
2434 | Serge | 27 | mov dword [esp-4], SSE_INIT |
28 | ldmxcsr [esp-4] |
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214 | serge | 29 | |
2434 | Serge | 30 | xorps xmm0, xmm0 |
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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221 | serge | 40 | .no_SSE: |
2434 | Serge | 41 | mov ecx, cr0 |
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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214 | serge | 47 | |
378 | serge | 48 | ; param |
49 | ; eax= 512 bytes memory area |
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50 | |||
214 | serge | 51 | align 4 |
378 | serge | 52 | fpu_save: |
2434 | Serge | 53 | push ecx |
54 | push esi |
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55 | push edi |
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378 | serge | 56 | |
2434 | Serge | 57 | pushfd |
58 | cli |
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378 | serge | 59 | |
2434 | Serge | 60 | clts |
61 | mov edi, eax |
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214 | serge | 62 | |
2434 | Serge | 63 | mov ecx, [fpu_owner] |
64 | mov esi, [CURRENT_TASK] |
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65 | cmp ecx, esi |
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66 | jne .save |
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435 | serge | 67 | |
2434 | Serge | 68 | call save_context |
69 | jmp .exit |
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435 | serge | 70 | .save: |
2434 | Serge | 71 | mov [fpu_owner], esi |
435 | serge | 72 | |
2434 | Serge | 73 | shl ecx, 8 |
74 | mov eax, [ecx+SLOT_BASE+APPDATA.fpu_state] |
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435 | serge | 75 | |
2434 | Serge | 76 | call save_context |
435 | serge | 77 | |
2434 | Serge | 78 | shl esi, 8 |
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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435 | serge | 84 | .exit: |
2434 | Serge | 85 | popfd |
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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378 | serge | 90 | |
435 | serge | 91 | align 4 |
92 | save_context: |
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2434 | Serge | 93 | bt [cpu_caps], CAPS_SSE |
94 | jnc .no_SSE |
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214 | serge | 95 | |
2434 | Serge | 96 | fxsave [eax] |
97 | ret |
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214 | serge | 98 | .no_SSE: |
2434 | Serge | 99 | fnsave [eax] |
100 | ret |
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214 | serge | 101 | |
102 | align 4 |
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378 | serge | 103 | fpu_restore: |
2434 | Serge | 104 | push ecx |
105 | push esi |
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378 | serge | 106 | |
2434 | Serge | 107 | mov esi, eax |
378 | serge | 108 | |
2434 | Serge | 109 | pushfd |
110 | cli |
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378 | serge | 111 | |
2434 | Serge | 112 | mov ecx, [fpu_owner] |
113 | mov eax, [CURRENT_TASK] |
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114 | cmp ecx, eax |
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115 | jne .copy |
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378 | serge | 116 | |
2434 | Serge | 117 | clts |
118 | bt [cpu_caps], CAPS_SSE |
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119 | jnc .no_SSE |
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214 | serge | 120 | |
2434 | Serge | 121 | fxrstor [esi] |
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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214 | serge | 126 | .no_SSE: |
2434 | Serge | 127 | fnclex ;fix possible problems |
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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378 | serge | 133 | .copy: |
2434 | Serge | 134 | shl eax, 8 |
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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214 | serge | 143 | |
144 | align 4 |
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1056 | Galkov | 145 | except_7: ;#NM exception handler |
465 | serge | 146 | save_ring3_context |
147 | clts |
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2434 | Serge | 148 | mov ax, app_data; |
149 | mov ds, ax |
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150 | mov es, ax |
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214 | serge | 151 | |
2434 | Serge | 152 | mov ebx, [fpu_owner] |
153 | cmp ebx, [CURRENT_TASK] |
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154 | je .exit |
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214 | serge | 155 | |
2434 | Serge | 156 | shl ebx, 8 |
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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214 | serge | 160 | |
2434 | Serge | 161 | fxsave [eax] |
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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465 | serge | 166 | fxrstor [eax] |
214 | serge | 167 | .exit: |
465 | serge | 168 | restore_ring3_context |
169 | iret |
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214 | serge | 170 | |
171 | .no_SSE: |
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2434 | Serge | 172 | fnsave [eax] |
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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465 | serge | 178 | restore_ring3_context |
179 | iret |
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214 | serge | 180 | |
181 | iglobal |
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3555 | Serge | 182 | fpu_owner dd 2 |
1056 | Galkov | 183 | endg |