Mercurial > mxe-octave
diff src/build-msvctools/math/log1pf.S @ 3061:f8299bb6c872
Initial support for native MSVC compilation.
* add MSVC support files: compiler wrappers and support libraries
* adapt libiconv to work with MSVC
* adapt gettext to work with MSVC
| author | Michael Goffioul <michael.goffioul@gmail.com> |
|---|---|
| date | Mon, 17 Jun 2013 22:43:11 -0400 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/build-msvctools/math/log1pf.S Mon Jun 17 22:43:11 2013 -0400 @@ -0,0 +1,47 @@ +/* + * Written by J.T. Conklin <jtc@netbsd.org>. + * Public domain. + * Removed header file dependency for use in libmingwex.a by + * Danny Smith <dannysmith@users.sourceforge.net> + */ + + .file "log1pf.S" + .text + .align 4 + /* The fyl2xp1 can only be used for values in + -1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2 + 0.29 is a safe value. + */ +limit: .float 0.29 +one: .float 1.0 +/* + * Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29, + * otherwise fyl2x with the needed extra computation. + */ +.globl _log1pf; + .def _log1pf; .scl 2; .type 32; .endef +_log1pf: + fldln2 + flds 4(%esp) + fxam + fnstsw + fld %st + sahf + jc 3f /* in case x is NaN or ħInf */ + +4: fabs + fcomps limit + fnstsw + sahf + jc 2f + fadds one + fyl2x + ret + +2: fyl2xp1 + ret + +3: jp 4b /* in case x is ħInf */ + fstp %st(1) + fstp %st(1) + ret