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Diffstat (limited to 'newlib/libm/machine/spu/headers/sinhd2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/sinhd2.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/sinhd2.h b/newlib/libm/machine/spu/headers/sinhd2.h new file mode 100644 index 000000000..59fafc52f --- /dev/null +++ b/newlib/libm/machine/spu/headers/sinhd2.h @@ -0,0 +1,133 @@ +/* -------------------------------------------------------------- */ +/* (C)Copyright 2006,2007, */ +/* International Business Machines Corporation */ +/* All Rights Reserved. */ +/* */ +/* Redistribution and use in source and binary forms, with or */ +/* without modification, are permitted provided that the */ +/* following conditions are met: */ +/* */ +/* - Redistributions of source code must retain the above copyright*/ +/* notice, this list of conditions and the following disclaimer. */ +/* */ +/* - Redistributions in binary form must reproduce the above */ +/* copyright notice, this list of conditions and the following */ +/* disclaimer in the documentation and/or other materials */ +/* provided with the distribution. */ +/* */ +/* - Neither the name of IBM Corporation nor the names of its */ +/* contributors may be used to endorse or promote products */ +/* derived from this software without specific prior written */ +/* permission. */ +/* Redistributions of source code must retain the above copyright */ +/* notice, this list of conditions and the following disclaimer. */ +/* */ +/* Redistributions in binary form must reproduce the above */ +/* copyright notice, this list of conditions and the following */ +/* disclaimer in the documentation and/or other materials */ +/* provided with the distribution. */ +/* */ +/* Neither the name of IBM Corporation nor the names of its */ +/* contributors may be used to endorse or promote products */ +/* derived from this software without specific prior written */ +/* permission. */ +/* */ +/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND */ +/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, */ +/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ +/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */ +/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR */ +/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */ +/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT */ +/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */ +/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) */ +/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */ +/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR */ +/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ +/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +/* -------------------------------------------------------------- */ +/* PROLOG END TAG zYx */ +#ifdef __SPU__ +#ifndef _SINHD2_H_ +#define _SINHD2_H_ 1 + +#include <spu_intrinsics.h> + +#include "expd2.h" +#include "recipd2.h" + +/* + * FUNCTION + * vector double _sinhd2(vector double angle) + * + * DESCRIPTION + * The _sinhd2 function computes the hyperbolic sine of a vector of + * angles (expressed in radians) to an accuracy of a double precision + * floating point. + */ +static __inline vector double _sinhd2(vector double x) +{ + // Coefficents for the power series + vec_double2 f03 = spu_splats(1.66666666666666666667E-01); // 1/(3!) + vec_double2 f05 = spu_splats(8.33333333333333333333E-03); // 1/(5!) + vec_double2 f07 = spu_splats(1.98412698412698412698E-04); // 1/(7!) + vec_double2 f09 = spu_splats(2.75573192239858906526E-06); // 1/(9!) + vec_double2 f11 = spu_splats(2.50521083854417187751E-08); // 1/(11!) + vec_double2 f13 = spu_splats(1.60590438368216145994E-10); // 1/(13!) + vec_double2 f15 = spu_splats(7.64716373181981647590E-13); // 1/(15!) + vec_double2 f17 = spu_splats(2.81145725434552076320E-15); // 1/(17!) + vec_double2 f19 = spu_splats(8.22063524662432971696E-18); // 1/(19!) + vec_double2 f21 = spu_splats(1.95729410633912612308E-20); // 1/(21!) + vec_double2 f23 = spu_splats(3.86817017063068403772E-23); // 1/(23!) + + + + // Check if the input is within the range [ -1.0 ... 1.0 ] + // If it is, we want to use the power series, otherwise + // we want to use the 0.5 * (e^x - e^-x) + + // round to float, check if within range. Results will be in + // slots 0 and 2, so we rotate right 4 bytes, and "or" with ourself + // to produce 64 bits of all 1's or 0's. + vec_uint4 use_exp = spu_cmpabsgt(spu_roundtf(x),spu_splats(1.0f)); + use_exp = spu_or(use_exp,spu_rlmaskqwbyte(use_exp,-4)); + + + + + // Perform the calculation of the power series using Horner's method + vec_double2 result; + vec_double2 x2 = spu_mul(x,x); + result = spu_madd(x2,f23,f21); + result = spu_madd(x2,result,f19); + result = spu_madd(x2,result,f17); + result = spu_madd(x2,result,f15); + result = spu_madd(x2,result,f13); + result = spu_madd(x2,result,f11); + result = spu_madd(x2,result,f09); + result = spu_madd(x2,result,f07); + result = spu_madd(x2,result,f05); + result = spu_madd(x2,result,f03); + result = spu_madd(x2,result,spu_splats(1.0)); + result = spu_mul(x,result); + + + // Perform calculation as a function of 0.5 * (e^x - e^-x) + vec_double2 ex = _expd2(x); + vec_double2 ex_inv = _recipd2(ex); + + vec_double2 r2= spu_sub(ex,ex_inv); + r2 = spu_mul(r2,spu_splats(0.5)); + + + // Select either the power series or exp version + result = spu_sel(result,r2,(vec_ullong2)use_exp); + + + + return result; + +} + +#endif /* _SINHD2_H_ */ +#endif /* __SPU__ */ |