diff options
| author | Bdale Garbee <bdale@gag.com> | 2013-12-19 01:38:40 -0700 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2013-12-19 01:38:40 -0700 |
| commit | 575bbaf976c5840fd0e308549c45a466fdec1352 (patch) | |
| tree | 11bfb498348bf7687bffc24699c4b1a998988ee4 /src/math/kf_sin.c | |
| parent | b825116df173b77e2cab217a7b76112c742f9279 (diff) | |
| parent | bc3610d8cecbfed40c62d4dcb93fc9a4d2a7c9e3 (diff) | |
Merge branch 'branch-1.3' into debian
Conflicts:
ChangeLog
altoslib/AltosRecordMM.java
altosui/Makefile.am
altosui/altos-windows.nsi.in
configure.ac
debian/changelog
debian/control
doc/Makefile
doc/altusmetrum.xsl
doc/release-notes-1.2.1.xsl
doc/release-notes-1.2.xsl
Diffstat (limited to 'src/math/kf_sin.c')
| -rw-r--r-- | src/math/kf_sin.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/math/kf_sin.c b/src/math/kf_sin.c new file mode 100644 index 00000000..e81fa0bd --- /dev/null +++ b/src/math/kf_sin.c @@ -0,0 +1,49 @@ +/* kf_sin.c -- float version of k_sin.c + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#include "fdlibm.h" + +#ifdef __STDC__ +static const float +#else +static float +#endif +half = 5.0000000000e-01,/* 0x3f000000 */ +S1 = -1.6666667163e-01, /* 0xbe2aaaab */ +S2 = 8.3333337680e-03, /* 0x3c088889 */ +S3 = -1.9841270114e-04, /* 0xb9500d01 */ +S4 = 2.7557314297e-06, /* 0x3638ef1b */ +S5 = -2.5050759689e-08, /* 0xb2d72f34 */ +S6 = 1.5896910177e-10; /* 0x2f2ec9d3 */ + +#ifdef __STDC__ + float __kernel_sinf(float x, float y, int iy) +#else + float __kernel_sinf(x, y, iy) + float x,y; int iy; /* iy=0 if y is zero */ +#endif +{ + float z,r,v; + __int32_t ix; + GET_FLOAT_WORD(ix,x); + ix &= 0x7fffffff; /* high word of x */ + if(ix<0x32000000) /* |x| < 2**-27 */ + {if((int)x==0) return x;} /* generate inexact */ + z = x*x; + v = z*x; + r = S2+z*(S3+z*(S4+z*(S5+z*S6))); + if(iy==0) return x+v*(S1+z*r); + else return x-((z*(half*y-v*r)-y)-v*S1); +} |