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Rev | Author | Line No. | Line |
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282 | palkovsky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2005 Jakub Vana |
282 | palkovsky | 3 | * All rights reserved. |
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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1702 | cejka | 27 | */ |
28 | |||
1877 | jermar | 29 | /** @addtogroup amd64 |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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282 | palkovsky | 33 | * |
34 | */ |
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35 | |||
36 | #include <fpu_context.h> |
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37 | |||
332 | palkovsky | 38 | /** Save FPU (mmx, sse) context using fxsave instruction */ |
282 | palkovsky | 39 | void fpu_context_save(fpu_context_t *fctx) |
40 | { |
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2082 | decky | 41 | asm volatile ( |
4017 | decky | 42 | "fxsave %[fctx]\n" |
43 | : [fctx] "=m" (*fctx) |
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44 | ); |
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282 | palkovsky | 45 | } |
46 | |||
332 | palkovsky | 47 | /** Restore FPU (mmx,sse) context using fxrstor instruction */ |
309 | palkovsky | 48 | void fpu_context_restore(fpu_context_t *fctx) |
282 | palkovsky | 49 | { |
2082 | decky | 50 | asm volatile ( |
4017 | decky | 51 | "fxrstor %[fctx]\n" |
52 | : [fctx] "=m" (*fctx) |
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53 | ); |
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282 | palkovsky | 54 | } |
55 | |||
906 | palkovsky | 56 | void fpu_init() |
282 | palkovsky | 57 | { |
326 | palkovsky | 58 | /* TODO: Zero all SSE, MMX etc. registers */ |
2082 | decky | 59 | asm volatile ( |
4017 | decky | 60 | "fninit\n" |
282 | palkovsky | 61 | ); |
62 | } |
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1702 | cejka | 63 | |
1877 | jermar | 64 | /** @} |
1702 | cejka | 65 | */ |