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Diffstat (limited to 'newlib/libm/machine/spu/headers/sincosd2.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/sincosd2.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/sincosd2.h b/newlib/libm/machine/spu/headers/sincosd2.h new file mode 100644 index 000000000..f87c36bc2 --- /dev/null +++ b/newlib/libm/machine/spu/headers/sincosd2.h @@ -0,0 +1,105 @@ +/* -------------------------------------------------------------- */ +/* (C)Copyright 2006,2007, */ +/* 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. */ +/* 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 _SINCOSD2_H_ +#define _SINCOSD2_H_ 1 + +#include <spu_intrinsics.h> + +#include "cos_sin.h" + +/* + * FUNCTION + * void _sincosd2(vector double x, vector double *sx, vector double *cx) + * + * DESCRIPTION + * The _sincosd2 function computes the sine and cosine of a vector of + * angles (expressed in radians) to an accuracy of a double precision + * floating point. + * + * + */ + +static __inline void _sincosd2(vector double angle, + vector double *sinx, + vector double *cosx) +{ + vec_int4 octant; + vec_ullong2 select; + vec_double2 cos, sin; + vec_double2 toggle_sign; + + /* Range reduce the input angle x into the range -PI/4 to PI/4 + * by performing simple modulus. + */ + MOD_PI_OVER_FOUR(angle, octant); + + /* Compute the cosine and sine of the range reduced input. + */ + COMPUTE_COS_SIN(angle, cos, sin); + + /* + * See the comments for the sind2 and cosd2 functions for an + * explanation of the following steps. + */ + octant = spu_shuffle(octant, octant, ((vec_uchar16) { 0,1,2,3, 0,1,2,3, 8,9,10,11, 8,9,10,11 })); + select = (vec_ullong2)spu_cmpeq(spu_and(octant, 2), 0); + + toggle_sign = (vec_double2)spu_sl(spu_and(spu_add(octant, 2), 4), ((vec_uint4) { 29,32,29,32 })); + *cosx = spu_xor(spu_sel(sin, cos, select), toggle_sign); + + toggle_sign = (vec_double2)spu_sl(spu_and(octant, 4), ((vec_uint4) { 29,32,29,32 })); + *sinx = spu_xor(spu_sel(cos, sin, select), toggle_sign); + + return; +} + +#endif /* _SINCOSD2_H_ */ +#endif /* __SPU__ */ |