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.global init_fp
init_fp:
call init_sse
push %eax
call init_x87
pop %ebx
or %ebx, %eax
ret
init_sse:
mov $0x1, %eax
cpuid
test %edx, 1<<25
jz no_sse
mov %cr0, %eax
and %ax, 0xFFFB
or %ax, 0x2
mov %eax, %cr0
mov %cr4, %eax
or %ax, 3<<9
mov %eax, %cr4
xor %eax, %eax
ret
no_sse:
mov $1, %eax
ret
init_x87:
mov %cr0, %eax
and %eax, (-1) - ((1 << 3) + (1 << 4))
mov %eax, %cr0
fninit
fnstsw (test)
cmpw $0, (test)
xor %eax, %eax
ret
no_x87:
mov $2, %eax
ret
test: .word 0x55AA
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