72 lines
2.2 KiB
Common Lisp
72 lines
2.2 KiB
Common Lisp
/*
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* Copyright (c) 2015 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 "../../../generic/lib/clcmacro.h"
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#include "math/clc_sqrt.h"
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_CLC_DEFINE_UNARY_BUILTIN(float, sqrt, __clc_sqrt, float)
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#ifdef cl_khr_fp16
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#pragma OPENCL EXTENSION cl_khr_fp16 : enable
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_CLC_DEFINE_UNARY_BUILTIN(half, sqrt, __clc_sqrt, half)
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#endif
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#ifdef cl_khr_fp64
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#pragma OPENCL EXTENSION cl_khr_fp64 : enable
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#ifdef __AMDGCN__
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#define __clc_builtin_rsq __builtin_amdgcn_rsq
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#else
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#define __clc_builtin_rsq __builtin_r600_recipsqrt_ieee
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#endif
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_CLC_OVERLOAD _CLC_DEF double sqrt(double x) {
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uint vcc = x < 0x1p-767;
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uint exp0 = vcc ? 0x100 : 0;
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unsigned exp1 = vcc ? 0xffffff80 : 0;
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double v01 = ldexp(x, exp0);
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double v23 = __clc_builtin_rsq(v01);
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double v45 = v01 * v23;
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v23 = v23 * 0.5;
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double v67 = fma(-v23, v45, 0.5);
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v45 = fma(v45, v67, v45);
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double v89 = fma(-v45, v45, v01);
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v23 = fma(v23, v67, v23);
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v45 = fma(v89, v23, v45);
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v67 = fma(-v45, v45, v01);
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v23 = fma(v67, v23, v45);
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v23 = ldexp(v23, exp1);
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return ((x == __builtin_inf()) || (x == 0.0)) ? v01 : v23;
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}
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_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, sqrt, double);
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#endif
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