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.global atan2
.type atan2,@function
atan2:
fldl 4(%esp)
fldl 12(%esp)
fpatan
fstpl 4(%esp)
fldl 4(%esp)
mov 8(%esp),%eax
add %eax,%eax
cmp $0x00200000,%eax
jae 1f
# subnormal x, return x with underflow
fsts 4(%esp)
1: ret
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