/* * Written by J.T. Conklin . * Public domain. * * Adapted for `long double' by Ulrich Drepper . * * Removed header file dependency for use in libmingwex.a by * Danny Smith */ .file "logl.S" .text .align 4 one: .double 1.0 /* It is not important that this constant is precise. It is only a value which is known to be on the safe side for using the fyl2xp1 instruction. */ limit: .double 0.29 .text .align 4 .globl _logl .def _logl; .scl 2; .type 32; .endef _logl: fldln2 // log(2) fldt 4(%esp) // x : log(2) fld %st // x : x : log(2) fsubl one // x-1 : x : log(2) fld %st // x-1 : x-1 : x : log(2) fabs // |x-1| : x-1 : x : log(2) fcompl limit // x-1 : x : log(2) fnstsw // x-1 : x : log(2) andb $0x45, %ah jz 2f fstp %st(1) // x-1 : log(2) fyl2xp1 // log(x) ret 2: fstp %st(0) // x : log(2) fyl2x // log(x) ret