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| author | Szabolcs Nagy <nsz@port70.net> | 2013-09-03 15:02:10 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <nsz@port70.net> | 2013-09-05 11:30:07 +0000 |
| commit | bcd797a5ba4631c031919dad832d670e564212e9 (patch) | |
| tree | 4ad873585d3e87dfca85b16baa3b6613a7e9f479 /src/math/__invtrigl.c | |
| parent | c2a0dfea629617a39af2f59bd400e1a3595d0783 (diff) | |
| download | musl-bcd797a5ba4631c031919dad832d670e564212e9.tar.gz musl-bcd797a5ba4631c031919dad832d670e564212e9.tar.bz2 musl-bcd797a5ba4631c031919dad832d670e564212e9.tar.xz musl-bcd797a5ba4631c031919dad832d670e564212e9.zip | |
math: long double inverse trigonometric cleanup (acosl, asinl, atanl, atan2l)
* added ld128 support from freebsd fdlibm (untested)
* using new ldshape union instead of IEEEl2bits
* inexact status flag is not supported
Diffstat (limited to 'src/math/__invtrigl.c')
| -rw-r--r-- | src/math/__invtrigl.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/math/__invtrigl.c b/src/math/__invtrigl.c index f2d33d3e..ef7f4e1b 100644 --- a/src/math/__invtrigl.c +++ b/src/math/__invtrigl.c @@ -1,7 +1,7 @@ +#include <float.h> #include "__invtrigl.h" #if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 - static const long double pS0 = 1.66666666666666666631e-01L, pS1 = -4.16313987993683104320e-01L, @@ -28,4 +28,36 @@ long double __invtrigl_R(long double z) q = 1.0+z*(qS1+z*(qS2+z*(qS3+z*(qS4+z*qS5)))); return p/q; } +#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 +static const long double +pS0 = 1.66666666666666666666666666666700314e-01L, +pS1 = -7.32816946414566252574527475428622708e-01L, +pS2 = 1.34215708714992334609030036562143589e+00L, +pS3 = -1.32483151677116409805070261790752040e+00L, +pS4 = 7.61206183613632558824485341162121989e-01L, +pS5 = -2.56165783329023486777386833928147375e-01L, +pS6 = 4.80718586374448793411019434585413855e-02L, +pS7 = -4.42523267167024279410230886239774718e-03L, +pS8 = 1.44551535183911458253205638280410064e-04L, +pS9 = -2.10558957916600254061591040482706179e-07L, +qS1 = -4.84690167848739751544716485245697428e+00L, +qS2 = 9.96619113536172610135016921140206980e+00L, +qS3 = -1.13177895428973036660836798461641458e+01L, +qS4 = 7.74004374389488266169304117714658761e+00L, +qS5 = -3.25871986053534084709023539900339905e+00L, +qS6 = 8.27830318881232209752469022352928864e-01L, +qS7 = -1.18768052702942805423330715206348004e-01L, +qS8 = 8.32600764660522313269101537926539470e-03L, +qS9 = -1.99407384882605586705979504567947007e-04L; + +const long double pio2_hi = 1.57079632679489661923132169163975140L; +const long double pio2_lo = 4.33590506506189051239852201302167613e-35L; + +long double __invtrigl_R(long double z) +{ + long double p, q; + p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*(pS5+z*(pS6+z*(pS7+z*(pS8+z*pS9))))))))); + q = 1.0+z*(qS1+z*(qS2+z*(qS3+z*(qS4+z*(qS5+z*(pS6+z*(pS7+z*(pS8+z*pS9)))))))); + return p/q; +} #endif |