.global log1pf .type log1pf,@function log1pf: mov 4(%esp),%eax fldln2 and $0x7fffffff,%eax flds 4(%esp) cmp $0x3e940000,%eax ja 1f cmp $0x00800000,%eax jb 2f fyl2xp1 fstps 4(%esp) flds 4(%esp) ret 1: fld1 faddp fyl2x fstps 4(%esp) flds 4(%esp) ret # subnormal x, return x with underflow 2: fxch fmul %st(1) fstps 4(%esp) ret