1.global atanf 2.type atanf,@function 3atanf: 4 flds 4(%esp) 5 mov 4(%esp),%eax 6 add %eax,%eax 7 cmp $0x01000000,%eax 8 jb 1f 9 fld1 10 fpatan 11 ret 12 # subnormal x, return x with underflow 131: fnstsw %ax 14 and $16,%ax 15 jnz 2f 16 fld %st(0) 17 fmul %st(1) 18 fstps 4(%esp) 192: ret 20