| /* | |
| * Written by J.T. Conklin <jtc@netbsd.org>. | |
| * Public domain. | |
| * | |
| * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>. | |
| * | |
| * Removed header file dependency for use in libmingwex.a by | |
| * Danny Smith <dannysmith@users.sourceforge.net> | |
| */ | |
| .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 |