1.global asin
 2.type asin,@function
 3asin:
 4	fldl 4(%esp)
 5	mov 8(%esp),%eax
 6	add %eax,%eax
 7	cmp $0x00200000,%eax
 8	jb 1f
 9	fld %st(0)
10	fld1
11	fsub %st(0),%st(1)
12	fadd %st(2)
13	fmulp
14	fsqrt
15	fpatan
16	fstpl 4(%esp)
17	fldl 4(%esp)
18	ret
19		# subnormal x, return x with underflow
201:	fsts 4(%esp)
21	ret