/*
 * Copyright (c) 2014 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "math64.h"
#include "sincosD_piby4.h"
#include "remainderD_piby2.h"

__attribute__((overloadable, always_inline)) double
sincos(double x, double * cp)
{
    double y = fabs(x);

    double r, rr;
    int regn;

    if (y < 0x1.0p+47)
        remainder_piby2_medium(y, &r, &rr, &regn);
    else 
        remainder_piby2_large(y, &r, &rr, &regn);

    double2 sc = sincos_piby4(r, rr);

    int flip = (regn > 1) << 31;
    int2 s = as_int2(regn & 1 ?  sc.hi : sc.lo);
    s.hi ^= flip ^ ((x < 0.0) << 31);
    sc.lo = -sc.lo;
    int2 c = as_int2(regn & 1 ? sc.lo : sc.hi);
    c.hi ^= flip;

    int xgeinf = isnan(x) | isinf(x);
    s = xgeinf ? as_int2(QNANBITPATT_DP64) : s;
    c = xgeinf ? as_int2(QNANBITPATT_DP64) : c;

    *cp = as_double(c);
    return as_double(s);
}

#if __OPENCL_C_VERSION__ < 200
__attribute__((overloadable, always_inline)) double
sincos(double x, __global double * cp)
{
    double c;
    double s = sincos(x, &c);
    *cp = c;
    return s;
}

__attribute__((overloadable, always_inline)) double
sincos(double x, __local double * cp)
{
    double c;
    double s = sincos(x, &c);
    *cp = c;
    return s;
}
#endif