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Diffstat (limited to 'newlib/libm/machine/spu/headers/sinhf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/sinhf4.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/sinhf4.h b/newlib/libm/machine/spu/headers/sinhf4.h new file mode 100644 index 000000000..de3da05ca --- /dev/null +++ b/newlib/libm/machine/spu/headers/sinhf4.h @@ -0,0 +1,116 @@ +/* -------------------------------------------------------------- */ +/* (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 _SINHF4_H_ +#define _SINHF4_H_ 1 + +#include <spu_intrinsics.h> + +#include "expf4.h" +#include "recipf4.h" + + +/* + * FUNCTION + * vector float _sinhf4(vector float angle) + * + * DESCRIPTION + * The _sinhf4 function computes the hyperbolic sine of a vector of + * angles (expressed in radians) to an accuracy of a single precision + * floating point. + * + */ +static __inline vector float _sinhf4(vector float x) +{ + // 1.0000 (above this number, use sinh(x) = 0.5 * (e^x - e^-x) + vec_uint4 threshold = (vec_uint4)spu_splats(0x3F800000); + + vec_uint4 sign_mask = (vec_uint4)spu_splats(0x80000000); + + // Coefficents for the Taylor series + vec_float4 f03 = spu_splats(1.6666666666666667E-1f); // 1/3! + vec_float4 f05 = spu_splats(8.3333333333333333E-3f); // 1/5! + vec_float4 f07 = spu_splats(1.9841269841269841E-4f); // 1/7! + vec_float4 f09 = spu_splats(2.7557319223985891E-6f); // 1/9! + vec_float4 f11 = spu_splats(2.5052108385441719E-8f); // 1/11! + + + // Perform the calculation as a Taylor series + vec_float4 result; + vec_float4 x2 = spu_mul(x,x); + result = spu_madd(x2,f11,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(1.0f)); + result = spu_mul(x,result); + + + // Perform calculation as a function of 0.5 * (e^x - e^-x) + vec_float4 ex =_expf4(x); + vec_float4 ex_inv = _recipf4(ex); + + vec_float4 r2= spu_sub(ex,ex_inv); + r2 = spu_mul(r2,spu_splats(0.5f)); + + vec_uint4 xabs = spu_andc((vec_uint4)x,sign_mask); + vec_uint4 use_exp = spu_cmpgt(xabs,threshold); + + // Select either the Taylor or exp version + result = spu_sel(result,r2,use_exp); + + // Flip the sign if needed + result = (vec_float4)spu_or((vec_uint4)result,spu_and((vec_uint4)x,sign_mask)); + + return result; + +} +#endif /* _SINHF4_H_ */ +#endif /* __SPU__ */ |