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Diffstat (limited to 'newlib/libm/machine/spu/headers/acoshf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/acoshf4.h | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/newlib/libm/machine/spu/headers/acoshf4.h b/newlib/libm/machine/spu/headers/acoshf4.h deleted file mode 100644 index 4a364b640..000000000 --- a/newlib/libm/machine/spu/headers/acoshf4.h +++ /dev/null @@ -1,160 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2007,2008, */ -/* 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. */ -/* */ -/* 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 _ACOSHF4_H_ -#define _ACOSHF4_H_ 1 - -#include <spu_intrinsics.h> -#include "logf4.h" -#include "sqrtf4.h" - -/* - * FUNCTION - * vector float _acoshf4(vector float x) - * - * DESCRIPTION - * The acoshf4 function returns a vector containing the hyperbolic - * arccosines of the corresponding elements of the input vector. - * - * We are using the formula: - * acosh = ln(x + sqrt(x^2 - 1)) - * - * For x near one, we use the Taylor series: - * - * infinity - * ------ - * - ' - * - k - * acosh x = - C (x - 1) - * - k - * - , - * ------ - * k = 0 - * - * - * Special Cases: - * - acosh(1) = +0 - * - NaNs and Infinity aren't supported for single-precision on SPU. - * - */ - -/* - * Taylor Series Coefficients - * for x around 1. - */ -#define SDM_ACOSHF4_TAY01 1.00000000000000000000000000000000000E0f /* 1 / 1 */ -#define SDM_ACOSHF4_TAY02 -8.33333333333333333333333333333333333E-2f /* 1 / 12 */ -#define SDM_ACOSHF4_TAY03 1.87500000000000000000000000000000000E-2f /* 3 / 160 */ -#define SDM_ACOSHF4_TAY04 -5.58035714285714285714285714285714286E-3f /* 5 / 896 */ -#define SDM_ACOSHF4_TAY05 1.89887152777777777777777777777777778E-3f /* 35 / 18432 */ -#define SDM_ACOSHF4_TAY06 -6.99129971590909090909090909090909091E-4f /* 63 / 90112 */ -#define SDM_ACOSHF4_TAY07 2.71136944110576923076923076923076923E-4f /* 231 / 851968 */ -#define SDM_ACOSHF4_TAY08 -1.09100341796875000000000000000000000E-4f /* 143 / 1310720 */ -#define SDM_ACOSHF4_TAY09 4.51242222505457261029411764705882353E-5f /* 6435 / 142606336 */ -#define SDM_ACOSHF4_TAY10 -1.90656436117071854440789473684210526E-5f /* 12155 / 637534208 */ -#define SDM_ACOSHF4_TAY11 8.19368731407892136346726190476190476E-6f /* 46189 / 5637144576 */ -#define SDM_ACOSHF4_TAY12 -3.57056927421818608823029891304347826E-6f /* 88179 / 24696061952 */ -#define SDM_ACOSHF4_TAY13 1.57402595505118370056152343750000000E-6f /* 676039 / 429496729600 */ -#define SDM_ACOSHF4_TAY14 -7.00688192241445735648826316550925926E-7f /* 1300075 / 1855425871872 */ -#define SDM_ACOSHF4_TAY15 3.14533061665033215078814276333512931E-7f /* 5014575 / 15942918602752 */ -#if 0 -#define SDM_ACOSHF4_TAY16 -1.42216292935641362301764949675529234E-7f /* 9694845 / 68169720922112 */ -#define SDM_ACOSHF4_TAY17 6.47111067761133282064375552264126864E-8f /* 100180065 / 1548112371908608 */ -#define SDM_ACOSHF4_TAY18 -2.96094097811711825280716376645224435E-8f /* 116680311 / 3940649673949184 */ -#define SDM_ACOSHF4_TAY19 1.36154380562817937676005090612011987E-8f /* 2268783825 / 166633186212708352 */ -#endif - - - -static __inline vector float _acoshf4(vector float x) -{ - vec_float4 minus_onef = spu_splats(-1.0f); - vec_float4 twof = spu_splats(2.0f); - vec_float4 largef = spu_splats(2.5e19f); - vec_float4 xminus1; - /* Where we switch from taylor to formula */ - vec_float4 switch_approx = spu_splats(2.0f); - vec_uint4 use_form; - vec_float4 result, fresult, mresult;; - - - /* - * Formula: - * acosh = ln(x + sqrt(x^2 - 1)) - */ - fresult = _sqrtf4(spu_madd(x, x, minus_onef)); - fresult = spu_add(x, spu_sel(fresult, x, spu_cmpgt(x, largef))); - fresult = _logf4(fresult); - fresult = (vec_float4)spu_add((vec_uint4)fresult, spu_splats(2u)); - - /* - * Taylor Series - */ - xminus1 = spu_add(x, minus_onef); - - mresult = spu_splats(SDM_ACOSHF4_TAY15); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY14)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY13)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY12)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY11)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY10)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY09)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY08)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY07)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY06)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY05)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY04)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY03)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY02)); - mresult = spu_madd(xminus1, mresult, spu_splats(SDM_ACOSHF4_TAY01)); - - mresult = spu_mul(mresult, _sqrtf4(spu_mul(xminus1, twof))); - mresult = (vec_float4)spu_add((vec_uint4)mresult, spu_splats(1u)); - - /* - * Select series or formula - */ - use_form = spu_cmpgt(x, switch_approx); - result = spu_sel(mresult, fresult, use_form); - - - return result; -} - -#endif /* _ACOSHF4_H_ */ -#endif /* __SPU__ */ |