libclc/generic/lib/math/sin.cl

   1 /*
   2  * Copyright (c) 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20  * THE SOFTWARE.
  21  */
  22
  23 #include <clc/clc.h>
  24
  25 #include "math.h"
  26 #include "sincos_helpers.h"
  27 #include "../clcmacro.h"
  28
  29 _CLC_OVERLOAD _CLC_DEF float sin(float x)
  30 {
  31     int ix = as_int(x);
  32     int ax = ix & 0x7fffffff;
  33     float dx = as_float(ax);
  34
  35     float r0, r1;
  36     int regn = __clc_argReductionS(&r0, &r1, dx);
  37
  38     float ss = __clc_sinf_piby4(r0, r1);
  39     float cc = __clc_cosf_piby4(r0, r1);
  40
  41     float s = (regn & 1) != 0 ? cc : ss;
  42     s = as_float(as_int(s) ^ ((regn > 1) << 31) ^ (ix ^ ax));
  43
  44     s = ax >= PINFBITPATT_SP32 ? as_float(QNANBITPATT_SP32) : s;
  45
  46     //Subnormals
  47     s = x == 0.0f ? x : s;
  48
  49     return s;
  50 }
  51
  52 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, sin, float);
  53
  54 #ifdef cl_khr_fp64
  55
  56 #pragma OPENCL EXTENSION cl_khr_fp64 : enable
  57
  58 _CLC_OVERLOAD _CLC_DEF double sin(double x) {
  59     double y = fabs(x);
  60
  61     double r, rr;
  62     int regn;
  63
  64     if (y < 0x1.0p+47)
  65         __clc_remainder_piby2_medium(y, &r, &rr, &regn);
  66     else
  67         __clc_remainder_piby2_large(y, &r, &rr, &regn);
  68
  69     double2 sc = __clc_sincos_piby4(r, rr);
  70
  71     int2 s = as_int2(regn & 1 ? sc.hi : sc.lo);
  72     s.hi ^= ((regn > 1) << 31) ^ ((x < 0.0) << 31);
  73
  74     return  isinf(x) | isnan(x) ? as_double(QNANBITPATT_DP64) : as_double(s);
  75 }
  76
  77 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, sin, double);
  78
  79 #endif