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/* ************************************************************************
* Copyright 2013 Advanced Micro Devices, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ************************************************************************/
static const char *rotm_kernel = "
#ifdef DOUBLE_PRECISION
#ifdef cl_khr_fp64
#pragma OPENCL EXTENSION cl_khr_fp64 : enable
#else
#pragma OPENCL EXTENSION cl_amd_fp64 : enable
#endif
#endif
#define ZERO (%TYPE)0.0
#define ONE (%TYPE)1.0
#define TWO (%TYPE)2.0
__kernel void %PREFIXrotm_kernel( __global %TYPE *_X, __global %TYPE *_Y, uint N,
uint offx, int incx, uint offy, int incy
#ifndef DO_ROT
, __global %TYPE *_param, uint offParam // Rotm parameters
#else
, %PTYPE C, %PTYPE S // Rot parameters
#endif
)
{
__global %TYPE *X = _X + offx;
__global %TYPE *Y = _Y + offy;
if ( incx < 0 ) {
X = X + (N - 1) * abs(incx);
}
if ( incy < 0 ) {
Y = Y + (N - 1) * abs(incy);
}
%PTYPE H11, H21, H12, H22, flag; // All these are of PTYPE for rot and rotm
#ifndef DO_ROT
// Incase of Rotm
flag = _param[offParam];
H11 = _param[offParam+1];
H21 = _param[offParam+2];
H12 = _param[offParam+3];
H22 = _param[offParam+4];
(flag == (ZERO))? (H11 = ONE, H22 = ONE) : 1; // 1 is dummy here to avoid compilation error
(flag == (ONE) )? (H21 = -ONE, H12 = ONE) : 1;
(flag == (-TWO))? (H11 = ONE, H21 = ZERO, H12 = ZERO, H22 = ONE) : 1;
#else // ROT
H11 = C;
H12 = S;
H21 = -S;
H22 = C;
#endif
int gOffset;
for( gOffset=(get_global_id(0) * %V); (gOffset + %V - 1)<N; gOffset+=( get_global_size(0) * %V ) )
{
%TYPE%V vReg1, vReg2, temp;
#ifdef INCX_NONUNITY
%VLOADWITHINCX( vReg1, (X + (gOffset*incx)), incx);
#else
vReg1 = %VLOAD( 0, (X + gOffset) );
#endif
#ifdef INCY_NONUNITY
%VLOADWITHINCX( vReg2, (Y + (gOffset*incy)), incy);
#else
vReg2 = %VLOAD( 0, (Y + gOffset) );
#endif
temp = (vReg1 * H11) + (vReg2 * H12);
vReg2 = (vReg1 * H21) + (vReg2 * H22);
#ifdef INCX_NONUNITY
%VSTOREWITHINCX( (X + (gOffset * incx)), temp, incx );
#else
%VSTORE( temp, 0 ,(X + (gOffset * incx)) );
#endif
#ifdef INCY_NONUNITY
%VSTOREWITHINCX( (Y + (gOffset * incy)), vReg2, incy );
#else
%VSTORE( vReg2, 0 ,(Y + (gOffset * incy)) );
#endif
}
// Loop for the last thread to handle the tail part of the vector
// Using the same gOffset used above
for( ; gOffset<N; gOffset++ )
{
%TYPE sReg1, sReg2, temp;
sReg1 = X[gOffset * incx];
sReg2 = Y[gOffset * incy];
temp = (sReg1 * H11) + (sReg2 * H12);
sReg2 = (sReg1 * H21) + (sReg2 * H22);
X[gOffset * incx] = temp;
Y[gOffset * incy] = sReg2;
}
}
\n";
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