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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 ( |
| 4345 | svoboda | 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 ( |
| 4345 | svoboda | 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 ( |
| 4345 | svoboda | 60 | "fninit\n" |
| 282 | palkovsky | 61 | ); |
| 62 | } |
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| 1702 | cejka | 63 | |
| 1877 | jermar | 64 | /** @} |
| 1702 | cejka | 65 | */ |