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Diffstat (limited to 'newlib/libm/machine/spu/headers/exp2d2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/exp2d2.h | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/newlib/libm/machine/spu/headers/exp2d2.h b/newlib/libm/machine/spu/headers/exp2d2.h deleted file mode 100644 index c7de4e880..000000000 --- a/newlib/libm/machine/spu/headers/exp2d2.h +++ /dev/null @@ -1,152 +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 _EXP2D2_H_ -#define _EXP2D2_H_ 1 - -#include <spu_intrinsics.h> - - -/* - * FUNCTION - * vector double _exp2d2(vector double x) - * - * DESCRIPTION - * _exp2d2 computes 2 raised to the input x for each - * of the double word elements of x. Computation is - * performed by observing the 2^(a+b) = 2^a * 2^b. - * We decompose x into a and b (above) by letting. - * a = ceil(x), b = x - a; - * - * 2^a is easily computed by placing a into the exponent - * or a floating point number whose mantissa is all zeros. - * - * 2^b is computed using the polynomial approximation. - * - * __13_ - * \ - * \ - * 2^x = / Ci*x^i - * /____ - * i=0 - * - * for x in the range 0.0 to 1.0. - * - */ -#define EXP_C00 1.0 -#define EXP_C01 6.93147180559945286227e-01 -#define EXP_C02 2.40226506959100694072e-01 -#define EXP_C03 5.55041086648215761801e-02 -#define EXP_C04 9.61812910762847687873e-03 -#define EXP_C05 1.33335581464284411157e-03 -#define EXP_C06 1.54035303933816060656e-04 -#define EXP_C07 1.52527338040598376946e-05 -#define EXP_C08 1.32154867901443052734e-06 -#define EXP_C09 1.01780860092396959520e-07 -#define EXP_C10 7.05491162080112087744e-09 -#define EXP_C11 4.44553827187081007394e-10 -#define EXP_C12 2.56784359934881958182e-11 -#define EXP_C13 1.36914888539041240648e-12 - -static __inline vector double _exp2d2(vector double vx) -{ - vec_int4 ix, exp; - vec_uint4 overflow, underflow; - vec_float4 vxf; - vec_double2 p1, p2, x2, x4, x8; - vec_double2 vy, vxw, out_of_range; - - /* Compute: vxw = x - ceil(x) - */ - vxw = spu_add(vx, spu_splats(0.5)); - vxf = spu_roundtf(vxw); - ix = spu_convts(vxf, 0); - ix = spu_add(ix, (vec_int4)spu_andc(spu_cmpgt(spu_splats(0.0f), vxf), spu_cmpeq(ix, spu_splats((int)0x80000000)))); - vxf = spu_convtf(ix, 0); - vxw = spu_sub(vx, spu_extend(vxf)); - - /* Detect overflow and underflow. If overflow, force the result - * to infinity (at the end). - */ - exp = spu_shuffle(ix, ix, ((vec_uchar16) { 0,1,2,3, 0,1,2,3, 8,9,10,11, 8,9,10,11 })); - - overflow = spu_cmpgt(exp, 1023); - underflow = spu_cmpgt(exp, -1023); - out_of_range = (vec_double2)spu_and(overflow, ((vec_uint4) { 0x7FF00000, 0, 0x7FF00000, 0 })); - - /* Calculate the result by evaluating the 13th order polynomial. - * For efficiency, the polynomial is broken into two parts and - * evaluate then using nested - * - * result = (((((c13*x + c12)*x + c11)*x + c10)*x + c9)*x + c8)*x^8 + - * ((((((c7*x + c6)*x + c5)*x + c4)*x + c3)*x + c2)*x + c1)*x + c0 - */ - p2 = spu_madd(spu_splats(EXP_C07), vxw, spu_splats(EXP_C06)); - p1 = spu_madd(spu_splats(EXP_C13), vxw, spu_splats(EXP_C12)); - x2 = spu_mul(vxw, vxw); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C05)); - p1 = spu_madd(vxw, p1, spu_splats(EXP_C11)); - x4 = spu_mul(x2, x2); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C04)); - p1 = spu_madd(vxw, p1, spu_splats(EXP_C10)); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C03)); - p1 = spu_madd(vxw, p1, spu_splats(EXP_C09)); - x8 = spu_mul(x4, x4); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C02)); - p1 = spu_madd(vxw, p1, spu_splats(EXP_C08)); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C01)); - p2 = spu_madd(vxw, p2, spu_splats(EXP_C00)); - vy = spu_madd(x8, p1, p2); - - /* Align the integer integer portion of x with the exponent. - */ - ix = spu_sl(ix, ((vec_uint4) { 20, 32, 20, 32 })); - vy = (vec_double2)spu_add((vec_int4)vy, ix); - - /* Select the result if not overflow or underflow. Otherwise select the - * the out of range value. - */ - return (spu_sel(vy, out_of_range, (vec_ullong2)spu_orc(overflow, underflow))); -} - -#endif /* _EXP2D2_H_ */ -#endif /* __SPU__ */ |