Mark
18 lines
444 B
ArmAsm
18 lines
444 B
ArmAsm
.section .text
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.global amd64_fpu_init
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amd64_fpu_init:
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// Disable FPU software emulation bit
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// Set MP (monitor coprocessor) bit
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mov %cr0, %rax
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and $~(1 << 2), %rax
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or $(1 << 1), %rax
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mov %rax, %cr0
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// Set OSFXR (1 << 9, OS support for fxsave/fxrstor)
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// Set OSXMMEXCPT (1 << 10, OS support for unmasked simd float exceptions)
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mov %cr4, %rax
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or $((1 << 9) | (1 << 10)), %rax
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mov %rax, %cr4
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retq
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