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Diffstat (limited to 'newlib/libm/machine/spu/headers/asinhd2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/asinhd2.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/newlib/libm/machine/spu/headers/asinhd2.h b/newlib/libm/machine/spu/headers/asinhd2.h deleted file mode 100644 index 8a0b97c4d..000000000 --- a/newlib/libm/machine/spu/headers/asinhd2.h +++ /dev/null @@ -1,163 +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 _ASINHD2_H_ -#define _ASINHD2_H_ 1 - -#include <spu_intrinsics.h> - -#include "logd2.h" -#include "sqrtd2.h" - -/* - * FUNCTION - * vector double _asinhd2(vector double x) - * - * DESCRIPTION - * The asinhd2 function returns a vector containing the hyperbolic - * arcsines of the corresponding elements of the input vector. - * - * We are using the formula: - * asinh = ln(|x| + sqrt(x^2 + 1)) - * and the anti-symmetry of asinh. - * - * For x near zero, we use the Taylor series: - * - * infinity - * ------ - * - ' P (0) - * - k-1 k - * asinh x = - ----- x - * - k - * - , - * ------ - * k = 1 - * - * Special Cases: - * asinh(+0) returns +0 - * asinh(-0) returns -0 - * asinh(+infinity) returns +infinity - * asinh(-infinity) returns -infinity - * asinh(NaN) returns NaN - * - */ - -/* - * Maclaurin Series Coefficients - * for x near 0. - */ -#define SDM_ASINHD2_MAC01 1.000000000000000000000000000000000000000000E0 -#define SDM_ASINHD2_MAC03 -1.666666666666666666666666666666666666666667E-1 -#define SDM_ASINHD2_MAC05 7.500000000000000000000000000000000000000000E-2 -#define SDM_ASINHD2_MAC07 -4.464285714285714285714285714285714285714286E-2 -#define SDM_ASINHD2_MAC09 3.038194444444444444444444444444444444444444E-2 -#define SDM_ASINHD2_MAC11 -2.237215909090909090909090909090909090909091E-2 -#define SDM_ASINHD2_MAC13 1.735276442307692307692307692307692307692308E-2 -#define SDM_ASINHD2_MAC15 -1.396484375000000000000000000000000000000000E-2 -#define SDM_ASINHD2_MAC17 1.155180089613970588235294117647058823529412E-2 - - -static __inline vector double _asinhd2(vector double x) -{ - vec_double2 sign_mask = spu_splats(-0.0); - vec_double2 oned = spu_splats(1.0); - vec_uchar16 dup_even = ((vec_uchar16) { 0,1,2,3, 0,1,2,3, 8,9,10,11, 8,9,10,11 }); - vec_uint4 infminus1 = spu_splats(0x7FEFFFFFU); - vec_uint4 isinfnan; - vec_double2 xabs, xsqu; - vec_uint4 xabshigh; - vec_float4 switch_approx = spu_splats(0.165f); /* Where we switch from maclaurin to formula */ - vec_uint4 use_form; - vec_float4 xf; - vec_double2 result, fresult, mresult; - - - xabs = spu_andc(x, sign_mask); - xsqu = spu_mul(x, x); - - xf = spu_roundtf(xabs); - xf = spu_shuffle(xf, xf, dup_even); - - /* - * Formula: - * asinh = ln(|x| + sqrt(x^2 + 1)) - */ - fresult = _sqrtd2(spu_add(xsqu, oned)); - fresult = spu_add(xabs, fresult); - fresult = _logd2(fresult); - - - /* - * Maclaurin Series approximation - */ - - mresult = spu_splats(SDM_ASINHD2_MAC17); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC15)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC13)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC11)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC09)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC07)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC05)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC03)); - mresult = spu_madd(xsqu, mresult, spu_splats(SDM_ASINHD2_MAC01)); - mresult = spu_mul(xabs, mresult); - - - /* - * Choose between series and formula - */ - use_form = spu_cmpgt(xf, switch_approx); - result = spu_sel(mresult, fresult, (vec_ullong2)use_form); - - - /* Special Cases */ - - /* Infinity and NaN */ - xabshigh = (vec_uint4)spu_shuffle(xabs, xabs, dup_even); - isinfnan = spu_cmpgt(xabshigh, infminus1); - result = spu_sel(result, x, (vec_ullong2)isinfnan); - - - /* Restore sign - asinh is an anti-symmetric */ - result = spu_sel(result, x, (vec_ullong2)sign_mask); - - return result; -} - -#endif /* _ASINHD2_H_ */ -#endif /* __SPU__ */ |