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Diffstat (limited to 'newlib/libm/machine/spu/headers/expm1f4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/expm1f4.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/newlib/libm/machine/spu/headers/expm1f4.h b/newlib/libm/machine/spu/headers/expm1f4.h deleted file mode 100644 index 519da1d2c..000000000 --- a/newlib/libm/machine/spu/headers/expm1f4.h +++ /dev/null @@ -1,118 +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 _EXPM1F4_H_ -#define _EXPM1F4_H_ 1 - -#include <spu_intrinsics.h> - -#include "expf4.h" -#include "divf4.h" - - -#define EXPM1F4_P0 0.0000000000000000000000000e-00 -#define EXPM1F4_P1 9.9999999999999988897769754e-01 -#define EXPM1F4_P2 -6.5597409827762467697531701e-04 -#define EXPM1F4_P3 2.3800889637330315679042414e-02 -#define EXPM1F4_P4 -1.0914929910143700584950963e-05 - -#define EXPM1F4_Q0 1.0000000000000000000000000e-00 -#define EXPM1F4_Q1 -5.0065597410018825019761834e-01 -#define EXPM1F4_Q2 1.0746220997195164714721471e-01 -#define EXPM1F4_Q3 -1.1966024153043854083566799e-02 -#define EXPM1F4_Q4 5.9997727954467768105711878e-04 - - -/* - * FUNCTION - * vector float _expm1f4(vector float x) - * - * _expm1d2 computes the exponential - 1 for each element - * of the input vector x. - * - * This function is intended to return accurate values, even - * where exp(x) - 1 would normally produce bad results due to - * floating-point cancellation errors. - * - */ - -static __inline vector float _expm1f4(vector float x) -{ - vector float onef = spu_splats(1.0f); - vector float rangelo = spu_splats(-0.4f); - vector float rangehi = spu_splats(0.35f); - vector unsigned int use_exp; - vector float pr, qr; - vector float eresult; - vector float rresult; - vector float result; - - use_exp = spu_or(spu_cmpgt(x, rangehi), spu_cmpgt(rangelo, x)); - - /* - * Calculate directly using exp(x) - 1 - */ - eresult = spu_sub(_expf4(x), onef); - - /* - * For x in [-0.5,0.5], use a rational approximation. - * The madd's are interleaved to reduce dependency stalls. Looks - * like gcc is smart enough to do this on it's own... but why - * take the chance. - */ - pr = spu_madd(x, spu_splats((float)EXPM1F4_P4), spu_splats((float)EXPM1F4_P3)); - qr = spu_madd(x, spu_splats((float)EXPM1F4_Q4), spu_splats((float)EXPM1F4_Q3)); - pr = spu_madd(pr, x, spu_splats((float)EXPM1F4_P2)); - qr = spu_madd(qr, x, spu_splats((float)EXPM1F4_Q2)); - pr = spu_madd(pr, x, spu_splats((float)EXPM1F4_P1)); - qr = spu_madd(qr, x, spu_splats((float)EXPM1F4_Q1)); - pr = spu_madd(pr, x, spu_splats((float)EXPM1F4_P0)); - qr = spu_madd(qr, x, spu_splats((float)EXPM1F4_Q0)); - rresult = _divf4(pr, qr); - - /* - * Select either direct calculation or rational approximation. - */ - result = spu_sel(rresult, eresult, use_exp); - - return result; -} - -#endif /* _EXPM1F4_H_ */ -#endif /* __SPU__ */ |