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Diffstat (limited to 'newlib/libm/machine/spu/headers/log2d2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/log2d2.h | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/newlib/libm/machine/spu/headers/log2d2.h b/newlib/libm/machine/spu/headers/log2d2.h deleted file mode 100644 index 25841af32..000000000 --- a/newlib/libm/machine/spu/headers/log2d2.h +++ /dev/null @@ -1,133 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2001,2008, */ -/* International Business Machines Corporation, */ -/* Sony Computer Entertainment, Incorporated, */ -/* Toshiba 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 _LOG2D2_H_ -#define _LOG2D2_H_ 1 - -#include <spu_intrinsics.h> - -/* - * FUNCTION - * vector double _log2d2(vector double x) - * - * DESCRIPTION - * The function _log2d2 computes log base 2 of the input x for each - * of the double word elements of x. The log2 is decomposed - * into two parts, log2 of the exponent and log2 of the - * fraction. The log2 of the fraction is approximated - * using a 21st order polynomial of the form: - * - * __20_ - * \ - * log(x) = x * (1 + \ (Ci * x^i)) - * / - * /____ - * i=0 - * - * for x in the range 0-1. - */ -#define LOG_C00 -#define LOG_C01 -#define LOG_C02 - -static __inline vector double _log2d2(vector double vx) -{ - vec_int4 addval; - vec_ullong2 exp_mask = spu_splats(0x7FF0000000000000ULL); - vec_double2 vy, vxw; - vec_double2 v1 = spu_splats(1.0); - vec_double2 x2, x4, x8, x10, p1, p2; - - /* Extract the fraction component of input by forcing - * its exponent so that input is in the range [1.0, 2.0) - * and then subtract 1.0 to force it in the range - * [0.0, 1.0). - */ - vxw = spu_sub(spu_sel(vx, v1, exp_mask), v1); - - /* Compute the log2 of the exponent as exp - 1023. - */ - addval = spu_add(spu_rlmask((vec_int4)vx, -20), -1023); - - /* Compute the log2 of the fractional component using a 21st - * order polynomial. The polynomial is evaluated in two halves - * to improve efficiency. - */ - p1 = spu_madd(spu_splats(3.61276447184348752E-05), vxw, spu_splats(-4.16662127033480827E-04)); - p2 = spu_madd(spu_splats(-1.43988260692073185E-01), vxw, spu_splats(1.60245637034704267E-01)); - p1 = spu_madd(vxw, p1, spu_splats(2.28193656337578229E-03)); - p2 = spu_madd(vxw, p2, spu_splats(-1.80329036970820794E-01)); - p1 = spu_madd(vxw, p1, spu_splats(-7.93793829370930689E-03)); - p2 = spu_madd(vxw, p2, spu_splats(2.06098446037376922E-01)); - p1 = spu_madd(vxw, p1, spu_splats(1.98461565426430164E-02)); - p2 = spu_madd(vxw, p2, spu_splats(-2.40449108727688962E-01)); - p1 = spu_madd(vxw, p1, spu_splats(-3.84093543662501949E-02)); - p2 = spu_madd(vxw, p2, spu_splats(2.88539004851839364E-01)); - p1 = spu_madd(vxw, p1, spu_splats(6.08335872067172597E-02)); - p2 = spu_madd(vxw, p2, spu_splats(-3.60673760117245982E-01)); - p1 = spu_madd(vxw, p1, spu_splats(-8.27937055456904317E-02)); - p2 = spu_madd(vxw, p2, spu_splats(4.80898346961226595E-01)); - p1 = spu_madd(vxw, p1, spu_splats(1.01392360727236079E-01)); - p2 = spu_madd(vxw, p2, spu_splats(-7.21347520444469934E-01)); - p1 = spu_madd(vxw, p1, spu_splats(-1.16530490533844182E-01)); - p2 = spu_madd(vxw, p2, spu_splats(0.44269504088896339E+00)); - p1 = spu_madd(vxw, p1, spu_splats(1.30009193360025350E-01)); - - x2 = spu_mul(vxw, vxw); - x4 = spu_mul(x2, x2); - x8 = spu_mul(x4, x4); - x10 = spu_mul(x8, x2); - - vy = spu_madd(spu_madd(x10, p1, p2), vxw, vxw); - - /* Add the log2(exponent) and the log2(fraction) to - * compute the final result. - */ - vy = spu_add(vy, spu_extend(spu_convtf(addval, 0))); - - vxw = spu_extend(spu_convtf(addval, 20)); - - return(vy); -} - -#endif /* _LOG2D2_H_ */ -#endif /* __SPU__ */ |