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Diffstat (limited to 'newlib/libm/machine/spu/headers/atand2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/atand2.h | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/newlib/libm/machine/spu/headers/atand2.h b/newlib/libm/machine/spu/headers/atand2.h deleted file mode 100644 index 244c15d3e..000000000 --- a/newlib/libm/machine/spu/headers/atand2.h +++ /dev/null @@ -1,103 +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 _ATAND2_H_ -#define _ATAND2_H_ 1 - -#include <spu_intrinsics.h> - -#include "simdmath.h" -#include "recipd2.h" -#include "logd2.h" -#include "acosd2.h" -#include "asind2.h" -#include "sqrtd2.h" - -/* - * FUNCTION - * vector double _atand2(vector double x) - * - * DESCRIPTION - * The _atand2 function computes the arc tangent of a vector of values x. - * - * The arc tangent function is computed using the following relations: - * [0, 1] : arcsin(x1/sqrt(spu_add(x1squ + 1 ))); - * (1, infinity] : PI/2 + atanf(-1/x) - * [-infinity, 0) : -arcsin(|x|) - * - */ - -static __inline vector double _atand2(vector double x) -{ - vector double signbit = spu_splats(-0.0); - vector double oned = spu_splats(1.0); - vector double pi2 = spu_splats(SM_PI_2); - vector double xabs, x1; - vector double result; - vector unsigned long long gt1; - - xabs = spu_andc(x, signbit); - gt1 = spu_cmpgt(xabs, oned); - - /* - * For x > 1, use the relation: - * atan(x) = pi/2 - atan(1/x), x>1 - */ - x1 = spu_sel(xabs, _recipd2(xabs), gt1); - - vector double x1squ = spu_mul(x1, x1); - - result = _asind2(_divd2(x1, _sqrtd2(spu_add(x1squ, oned)))); - - /* - * For x > 1, use the relation: atan(x) = pi/2 - atan(1/x), x>1 - */ - result = spu_sel(result, spu_sub(pi2, result), gt1); - - /* - * Antisymmetric function - preserve sign of x in result. - */ - result = spu_sel(result, x, (vec_ullong2)signbit); - - return (result); -} - -#endif /* _ATAND2_H_ */ -#endif /* __SPU__ */ |