17 lines
424 B
NASM
17 lines
424 B
NASM
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global enable_sse
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enable_sse:
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mov rax, cr0
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and ax, 0xFFFB ;clear coprocessor emulation CR0.EM
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or ax, 0x2 ;set coprocessor monitoring CR0.MP
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mov cr0, rax
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mov rax, cr4
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or ax, 3 << 9 ;set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time
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mov cr4, rax
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ret
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global enable_write_protect
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enable_write_protect:
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mov rax, cr0
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or eax, 0x80000 ;set write-protect CR0.WP
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mov cr0, rax
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ret
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