78 lines
2.3 KiB
Common Lisp
78 lines
2.3 KiB
Common Lisp
/*
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* Copyright (c) 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <clc/clc.h>
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#include "math.h"
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#include "sincos_helpers.h"
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#include "../clcmacro.h"
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_CLC_OVERLOAD _CLC_DEF float cos(float x)
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{
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int ix = as_int(x);
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int ax = ix & 0x7fffffff;
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float dx = as_float(ax);
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float r0, r1;
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int regn = __clc_argReductionS(&r0, &r1, dx);
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float ss = -__clc_sinf_piby4(r0, r1);
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float cc = __clc_cosf_piby4(r0, r1);
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float c = (regn & 1) != 0 ? ss : cc;
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c = as_float(as_int(c) ^ ((regn > 1) << 31));
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c = ax >= PINFBITPATT_SP32 ? as_float(QNANBITPATT_SP32) : c;
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return c;
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}
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_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, cos, float);
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#ifdef cl_khr_fp64
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#pragma OPENCL EXTENSION cl_khr_fp64 : enable
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_CLC_OVERLOAD _CLC_DEF double cos(double x) {
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x = fabs(x);
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double r, rr;
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int regn;
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if (x < 0x1.0p+47)
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__clc_remainder_piby2_medium(x, &r, &rr, ®n);
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else
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__clc_remainder_piby2_large(x, &r, &rr, ®n);
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double2 sc = __clc_sincos_piby4(r, rr);
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sc.lo = -sc.lo;
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int2 c = as_int2(regn & 1 ? sc.lo : sc.hi);
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c.hi ^= (regn > 1) << 31;
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return isnan(x) | isinf(x) ? as_double(QNANBITPATT_DP64) : as_double(c);
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}
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_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, cos, double);
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#endif
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