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Diffstat (limited to 'newlib/libm/machine/spu/headers/expm1d2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/expm1d2.h | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/newlib/libm/machine/spu/headers/expm1d2.h b/newlib/libm/machine/spu/headers/expm1d2.h deleted file mode 100644 index ba2369a1d..000000000 --- a/newlib/libm/machine/spu/headers/expm1d2.h +++ /dev/null @@ -1,135 +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 _EXPM1D2_H_ -#define _EXPM1D2_H_ 1 - -#include <spu_intrinsics.h> - -#include "expd2.h" -#include "divd2.h" - -#define EXPM1_P0 0.0000000000000000000000000e+00 -#define EXPM1_P1 1.0000000000000000000000000e+00 -#define EXPM1_P2 9.7234232565378004697204117e-04 -#define EXPM1_P3 3.3328278237299953368211192e-02 -#define EXPM1_P4 3.1156225044634678993365345e-05 -#define EXPM1_P5 2.1352206553343212164751408e-04 -#define EXPM1_P6 1.6975135794626144795757452e-07 -#define EXPM1_P7 2.7686287801334994383131629e-07 -#define EXPM1_P8 1.1186114936216450015354379e-10 - -#define EXPM1_Q0 1.0000000000000000000000000e+00 -#define EXPM1_Q1 -4.9902765767434620336473472e-01 -#define EXPM1_Q2 1.1617544040780639069687652e-01 -#define EXPM1_Q3 -1.6551954366467523660499950e-02 -#define EXPM1_Q4 1.5864115838972218334307351e-03 -#define EXPM1_Q5 -1.0534540477401370666288988e-04 -#define EXPM1_Q6 4.7650003993592160620959043e-06 -#define EXPM1_Q7 -1.3529198871087017840776265e-07 -#define EXPM1_Q8 1.8635779407675460757658020e-09 - -/* - * FUNCTION - * vector double _expm1d2(vector double x) - * - * DESCRIPTION - * _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 double _expm1d2(vector double x) -{ - vector double oned = spu_splats(1.0); - vector double range = spu_splats(1.0625); - vector unsigned long long use_exp; - vector double pr, qr; - vector double eresult; - vector double rresult; - vector double result; - - /* Compiler Bug. Replace xbug with x when spu_cmp*() doesn't - * modify it's arguments! */ - volatile vector double xbug = x; - use_exp = spu_cmpabsgt(xbug, range); - - /* - * Calculate directly using exp(x) - 1 - */ - eresult = spu_sub(_expd2(x), oned); - - /* - * For x in [-1.0625,1.0625], 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(EXPM1_P8), spu_splats(EXPM1_P7)); - qr = spu_madd(x, spu_splats(EXPM1_Q8), spu_splats(EXPM1_Q7)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P6)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q6)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P5)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q5)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P4)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q4)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P3)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q3)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P2)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q2)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P1)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q1)); - pr = spu_madd(pr, x, spu_splats(EXPM1_P0)); - qr = spu_madd(qr, x, spu_splats(EXPM1_Q0)); - rresult = _divd2(pr, qr); - - /* - * Select either direct calculation or rational approximation. - */ - result = spu_sel(rresult, eresult, use_exp); - - return result; -} - -#endif /* _EXPM1D2_H_ */ -#endif /* __SPU__ */ |