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 cos(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 c = (regn & 1) != 0 ? ss : cc; 42 c = as_float(as_int(c) ^ ((regn > 1) << 31)); 43 44 c = ax >= PINFBITPATT_SP32 ? as_float(QNANBITPATT_SP32) : c; 45 46 return c; 47} 48 49_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, cos, float); 50 51#ifdef cl_khr_fp64 52 53#pragma OPENCL EXTENSION cl_khr_fp64 : enable 54 55_CLC_OVERLOAD _CLC_DEF double cos(double x) { 56 x = fabs(x); 57 58 double r, rr; 59 int regn; 60 61 if (x < 0x1.0p+47) 62 __clc_remainder_piby2_medium(x, &r, &rr, ®n); 63 else 64 __clc_remainder_piby2_large(x, &r, &rr, ®n); 65 66 double2 sc = __clc_sincos_piby4(r, rr); 67 sc.lo = -sc.lo; 68 69 int2 c = as_int2(regn & 1 ? sc.lo : sc.hi); 70 c.hi ^= (regn > 1) << 31; 71 72 return isnan(x) | isinf(x) ? as_double(QNANBITPATT_DP64) : as_double(c); 73} 74 75_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, cos, double); 76 77#endif 78