Mercurial > mxe-octave
comparison src/build-msvctools/math/log1p.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> |
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| date | Mon, 17 Jun 2013 22:43:11 -0400 |
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| 3060:cbdf4575016d | 3061:f8299bb6c872 |
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| 1 /* | |
| 2 * Written by J.T. Conklin <jtc@netbsd.org>. | |
| 3 * Public domain. | |
| 4 * Removed header file dependency for use in libmingwex.a by | |
| 5 * Danny Smith <dannysmith@users.sourceforge.net> | |
| 6 */ | |
| 7 | |
| 8 .file "log1p.S" | |
| 9 .text | |
| 10 .align 4 | |
| 11 /* The fyl2xp1 can only be used for values in | |
| 12 -1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2 | |
| 13 0.29 is a safe value. | |
| 14 */ | |
| 15 limit: .double 0.29 | |
| 16 one: .double 1.0 | |
| 17 /* | |
| 18 * Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29, | |
| 19 * otherwise fyl2x with the needed extra computation. | |
| 20 */ | |
| 21 .globl _log1p; | |
| 22 .def _log1p; .scl 2; .type 32; .endef | |
| 23 _log1p: | |
| 24 fldln2 | |
| 25 fldl 4(%esp) | |
| 26 fxam | |
| 27 fnstsw | |
| 28 fld %st | |
| 29 sahf | |
| 30 jc 3f /* in case x is NaN or ħInf */ | |
| 31 | |
| 32 4: fabs | |
| 33 fcompl limit | |
| 34 fnstsw | |
| 35 sahf | |
| 36 jc 2f | |
| 37 faddl one | |
| 38 fyl2x | |
| 39 ret | |
| 40 | |
| 41 2: fyl2xp1 | |
| 42 ret | |
| 43 | |
| 44 3: jp 4b /* in case x is ħInf */ | |
| 45 fstp %st(1) | |
| 46 fstp %st(1) | |
| 47 ret |