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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libm/] [machine/] [spu/] [headers/] [sincosf4.h] - Blame information for rev 207

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1 207 jeremybenn
/* --------------------------------------------------------------  */
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/* (C)Copyright 2007,2008,                                         */
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/* International Business Machines Corporation                     */
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/* All Rights Reserved.                                            */
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/*                                                                 */
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/* Redistribution and use in source and binary forms, with or      */
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/* without modification, are permitted provided that the           */
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/* following conditions are met:                                   */
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/*                                                                 */
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/* - Redistributions of source code must retain the above copyright*/
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/*   notice, this list of conditions and the following disclaimer. */
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/*                                                                 */
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/* - Redistributions in binary form must reproduce the above       */
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/*   copyright notice, this list of conditions and the following   */
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/*   disclaimer in the documentation and/or other materials        */
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/*   provided with the distribution.                               */
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/*                                                                 */
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/* - Neither the name of IBM Corporation nor the names of its      */
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/*   contributors may be used to endorse or promote products       */
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/*   derived from this software without specific prior written     */
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/*   permission.                                                   */
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/*                                                                 */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND          */
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/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,     */
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/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF        */
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/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE        */
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/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR            */
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/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,    */
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/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT    */
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/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;    */
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/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)        */
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/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN       */
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/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR    */
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/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  */
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/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              */
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/* --------------------------------------------------------------  */
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/* PROLOG END TAG zYx                                              */
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#ifdef __SPU__
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#ifndef _SINCOSF4_H_
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#define _SINCOSF4_H_    1
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#include <spu_intrinsics.h>
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#include "cos_sin.h"
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/*
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 * FUNCTION
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 *  vector void _sincosf4(vector float angle, vector float *sx, vector float *cx)
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 *
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 * DESCRIPTION
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 *  The _sincosf4 function computes the sine and cosine of a vector of
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 *      angles (expressed in radians) to an accuracy of a single precision
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 *      floating point.
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 *
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 */
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static __inline void _sincosf4(vector float angle,
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                               vector float *sinx,
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                               vector float *cosx)
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{
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    vec_int4   octant;
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    vec_uint4  select;
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    vec_float4 cos, sin;
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    vec_float4 toggle_sign;
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    /* Range reduce the input angle x into the range -PI/4 to PI/4
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     * by performing simple modulus.
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     */
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    MOD_PI_OVER_FOUR_F(angle, octant);
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    /* Compute the cosine and sine of the range reduced input.
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     */
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    COMPUTE_COS_SIN_F(angle, cos, sin);
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    select = spu_cmpeq(spu_and(octant, 2), 0);
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    toggle_sign = (vec_float4)spu_sl(spu_and(octant, 4), 29);
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    *sinx = spu_xor(spu_sel(cos, sin, select), toggle_sign);
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    toggle_sign = (vec_float4)spu_sl(spu_and(spu_add(octant, 2), 4), 29);
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    *cosx = spu_xor(spu_sel(sin, cos, select), toggle_sign);
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    return;
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}
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#endif /* _SINCOSF4_H_ */
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#endif /* __SPU__ */

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