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Diffstat (limited to 'newlib/libm/machine/spu/headers/log1pf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/log1pf4.h | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/newlib/libm/machine/spu/headers/log1pf4.h b/newlib/libm/machine/spu/headers/log1pf4.h deleted file mode 100644 index 0aa4f5c6c..000000000 --- a/newlib/libm/machine/spu/headers/log1pf4.h +++ /dev/null @@ -1,112 +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 _LOG1PF4_H_ -#define _LOG1PF4_H_ 1 - -#include <spu_intrinsics.h> -#include "simdmath.h" - -#include "logf4.h" -#include "divf4.h" - -/* - * FUNCTION - * vector float _log1pf4(vector float x) - * - * DESCRIPTION - * The function _log1pf4 computes the natural logarithm of x + 1 - * for each of the float word elements of x. - * - * - */ - -#define LOG1PF4_P0 0.0000000000000000000000000e+00f -#define LOG1PF4_P1 1.0000000000000000000000000e+00f -#define LOG1PF4_P2 1.4220868022897381610647471e+00f -#define LOG1PF4_P3 5.4254553902256308361984338e-01f -#define LOG1PF4_P4 4.5971908823142115796400731e-02f - -#define LOG1PF4_Q0 1.0000000000000000000000000e+00f -#define LOG1PF4_Q1 1.9220868007537357247116461e+00f -#define LOG1PF4_Q2 1.1702556461286610645089468e+00f -#define LOG1PF4_Q3 2.4040413392943396631018516e-01f -#define LOG1PF4_Q4 1.0637426466449625625521058e-02f - - -static __inline vector float _log1pf4(vector float x) -{ - vector float onef = spu_splats(1.0f); - vector float range = spu_splats(0.35f); - vector unsigned int use_log; - vector float pr, qr; - vector float eresult; - vector float rresult; - vector float result; - - use_log = spu_cmpabsgt(x, range); - - /* - * Calculate directly using log(x+1) - */ - eresult = _logf4(spu_add(x, onef)); - - /* - * For x in [-0.35,0.35], use a rational approximation. - */ - pr = spu_madd(x, spu_splats((float)LOG1PF4_P4), spu_splats((float)LOG1PF4_P3)); - qr = spu_madd(x, spu_splats((float)LOG1PF4_Q4), spu_splats((float)LOG1PF4_Q3)); - pr = spu_madd(pr, x, spu_splats((float)LOG1PF4_P2)); - qr = spu_madd(qr, x, spu_splats((float)LOG1PF4_Q2)); - pr = spu_madd(pr, x, spu_splats((float)LOG1PF4_P1)); - qr = spu_madd(qr, x, spu_splats((float)LOG1PF4_Q1)); - pr = spu_madd(pr, x, spu_splats((float)LOG1PF4_P0)); - qr = spu_madd(qr, x, spu_splats((float)LOG1PF4_Q0)); - rresult = _divf4(pr, qr); - - /* - * Select either direct calculation or rational approximation. - */ - result = spu_sel(rresult, eresult, use_log); - - return result; -} - -#endif /* _LOG1PF4_H_ */ -#endif /* __SPU__ */ |