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#include "sincos_helpers.h" 23#include <clc/clc.h> 24#include <clc/clcmacro.h> 25#include <clc/math/clc_fabs.h> 26#include <clc/math/math.h> 27#include <clc/math/tables.h> 28#include <clc/relational/clc_isinf.h> 29#include <clc/relational/clc_isnan.h> 30 31_CLC_DEF _CLC_OVERLOAD float __clc_tan(float x) { 32 int ix = as_int(x); 33 int ax = ix & 0x7fffffff; 34 float dx = as_float(ax); 35 36 float r0, r1; 37 int regn = __clc_argReductionS(&r0, &r1, dx); 38 39 float t = __clc_tanf_piby4(r0 + r1, regn); 40 t = as_float(as_int(t) ^ (ix ^ ax)); 41 42 t = ax >= PINFBITPATT_SP32 ? as_float(QNANBITPATT_SP32) : t; 43 // Take care of subnormals 44 t = (x == 0.0f) ? x : t; 45 return t; 46} 47_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, float, __clc_tan, float); 48 49#ifdef cl_khr_fp64 50#include "sincosD_piby4.h" 51 52_CLC_DEF _CLC_OVERLOAD double __clc_tan(double x) { 53 double y = __clc_fabs(x); 54 55 double r, rr; 56 int regn; 57 58 if (y < 0x1.0p+30) 59 __clc_remainder_piby2_medium(y, &r, &rr, ®n); 60 else 61 __clc_remainder_piby2_large(y, &r, &rr, ®n); 62 63 double2 tt = __clc_tan_piby4(r, rr); 64 65 int2 t = as_int2(regn & 1 ? tt.y : tt.x); 66 t.hi ^= (x < 0.0) << 31; 67 68 return __clc_isnan(x) || __clc_isinf(x) ? as_double(QNANBITPATT_DP64) 69 : as_double(t); 70} 71_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, double, __clc_tan, double); 72 73#endif 74