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34 lines
649 B
34 lines
649 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_FPU_XCR_H |
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#define _ASM_X86_FPU_XCR_H |
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/* |
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* MXCSR and XCR definitions: |
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*/ |
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static inline void ldmxcsr(u32 mxcsr) |
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{ |
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asm volatile("ldmxcsr %0" :: "m" (mxcsr)); |
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} |
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extern unsigned int mxcsr_feature_mask; |
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#define XCR_XFEATURE_ENABLED_MASK 0x00000000 |
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static inline u64 xgetbv(u32 index) |
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{ |
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u32 eax, edx; |
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asm volatile("xgetbv" : "=a" (eax), "=d" (edx) : "c" (index)); |
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return eax + ((u64)edx << 32); |
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} |
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static inline void xsetbv(u32 index, u64 value) |
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{ |
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u32 eax = value; |
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u32 edx = value >> 32; |
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asm volatile("xsetbv" :: "a" (eax), "d" (edx), "c" (index)); |
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} |
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#endif /* _ASM_X86_FPU_XCR_H */
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