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| Rev 827 | Rev 906 | ||
|---|---|---|---|
| Line 32... | Line 32... | ||
| 32 | #include <cpu.h> |
32 | #include <cpu.h> |
| 33 | 33 | ||
| 34 | /** Save FPU (mmx, sse) context using fxsave instruction */ |
34 | /** Save FPU (mmx, sse) context using fxsave instruction */ |
| 35 | void fpu_context_save(fpu_context_t *fctx) |
35 | void fpu_context_save(fpu_context_t *fctx) |
| 36 | { |
36 | { |
| 37 | /* Align on 16-byte boundary */ |
- | |
| 38 | if (((__u64)fctx) & 0xf) |
- | |
| 39 | fctx = (fpu_context_t *)((((__u64)fctx) | 0xf) + 1); |
- | |
| 40 | - | ||
| 41 | __asm__ volatile ( |
37 | __asm__ volatile ( |
| 42 | "fxsave %0" |
38 | "fxsave %0" |
| 43 | : "=m"(*fctx) |
39 | : "=m"(*fctx) |
| 44 | ); |
40 | ); |
| 45 | } |
41 | } |
| 46 | 42 | ||
| 47 | /** Restore FPU (mmx,sse) context using fxrstor instruction */ |
43 | /** Restore FPU (mmx,sse) context using fxrstor instruction */ |
| 48 | void fpu_context_restore(fpu_context_t *fctx) |
44 | void fpu_context_restore(fpu_context_t *fctx) |
| 49 | { |
45 | { |
| 50 | /* Align on 16-byte boundary */ |
- | |
| 51 | if (((__u64)fctx) & 0xf) |
- | |
| 52 | fctx = (fpu_context_t *)((((__u64)fctx) | 0xf) + 1); |
- | |
| 53 | __asm__ volatile ( |
46 | __asm__ volatile ( |
| 54 | "fxrstor %0" |
47 | "fxrstor %0" |
| 55 | : "=m"(*fctx) |
48 | : "=m"(*fctx) |
| 56 | ); |
49 | ); |
| 57 | } |
50 | } |
| 58 | 51 | ||
| 59 | void fpu_init(fpu_context_t *fctx) |
52 | void fpu_init() |
| 60 | { |
53 | { |
| 61 | /* TODO: Zero all SSE, MMX etc. registers */ |
54 | /* TODO: Zero all SSE, MMX etc. registers */ |
| 62 | __asm__ volatile ( |
55 | __asm__ volatile ( |
| 63 | "fninit;" |
56 | "fninit;" |
| 64 | ); |
57 | ); |