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/*
* 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 <clc/clc.h>
#include "math.h"
#include "sincos_helpers.h"
#include "../clcmacro.h"
#include "tables.h"
_CLC_DEF _CLC_OVERLOAD float __clc_tan(float x)
{
int ix = as_int(x);
int ax = ix & 0x7fffffff;
float dx = as_float(ax);
float r0, r1;
int regn = __clc_argReductionS(&r0, &r1, dx);
float t = __clc_tanf_piby4(r0 + r1, regn);
t = as_float(as_int(t) ^ (ix ^ ax));
t = ax >= PINFBITPATT_SP32 ? as_float(QNANBITPATT_SP32) : t;
//Take care of subnormals
t = (x == 0.0f) ? x : t;
return t;
}
_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, float, __clc_tan, float);
#ifdef cl_khr_fp64
#include "sincosD_piby4.h"
_CLC_DEF _CLC_OVERLOAD double __clc_tan(double x)
{
double y = fabs(x);
double r, rr;
int regn;
if (y < 0x1.0p+30)
__clc_remainder_piby2_medium(y, &r, &rr, ®n);
else
__clc_remainder_piby2_large(y, &r, &rr, ®n);
double2 tt = __clc_tan_piby4(r, rr);
int2 t = as_int2(regn & 1 ? tt.y : tt.x);
t.hi ^= (x < 0.0) << 31;
return isnan(x) || isinf(x) ? as_double(QNANBITPATT_DP64) : as_double(t);
}
_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, double, __clc_tan, double);
#endif
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