25 lines
1.5 KiB
C
25 lines
1.5 KiB
C
#ifndef _KERNEL_AMD64_FX_H
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#define _KERNEL_AMD64_FX_H
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#define fx_save(buf) \
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do { \
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__asm__ volatile("fxsave64 %0" : "=m"(*(buf))::"memory"); \
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} while (0)
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#define fx_restore(buf) \
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do { \
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__asm__ volatile("fxrstor64 %0" ::"m"(*(buf)) : "memory"); \
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} while (0)
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#define fx_init(buf) \
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do { \
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memset((buf), 0, sizeof((buf))); \
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__asm__ volatile("fninit; fxsave64 %0" : "=m"(*(buf))::"memory"); \
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uint32_t* __mxcsr = (uint32_t*)&(buf)[24]; \
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*__mxcsr = 0x1F80; \
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uint16_t* __fcw = (uint16_t*)&(buf)[0]; \
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*__fcw = 0x037F; \
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} while (0)
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#endif // _KERNEL_AMD64_FX_H
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