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.global asinf
.type asinf,@function
asinf:
flds 4(%esp)
mov 4(%esp),%eax
add %eax,%eax
cmp $0x01000000,%eax
jae 1f
# subnormal x, return x with underflow
fnstsw %ax
and $16,%ax
jnz 2f
fld %st(0)
fmul %st(1)
fstps 4(%esp)
2: ret
.global asinl
.type asinl,@function
asinl:
fldt 4(%esp)
jmp 1f
.global asin
.type asin,@function
asin:
fldl 4(%esp)
mov 8(%esp),%eax
add %eax,%eax
cmp $0x00200000,%eax
jae 1f
# subnormal x, return x with underflow
fnstsw %ax
and $16,%ax
jnz 2f
fsts 4(%esp)
2: ret
1: fld %st(0)
fld1
fsub %st(0),%st(1)
fadd %st(2)
fmulp
fsqrt
fpatan
ret
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