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fpga-mem-bench-kernel-blk2d.cl
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//====================================================================================================================================
// Memory bandwidth benchmark kernel for OpenCL-capable FPGAs: 2D overlapped blocking
// (c) 2019, Hamid Reza Zohouri @ Tokyo Institute of Technology
//====================================================================================================================================
//=====================================================================
// NDRange Kernels
//=====================================================================
#ifdef NDR
//=======================
// Read One - Write One
//=======================
__kernel void R1W1(__global const float* restrict a,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int halo)
{
int x = get_local_id(0) * VEC;
int gidx = get_group_id(0);
int y = get_global_id(1);
int bx = gidx * (BLOCK_X - 2 * halo);
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index];
}
}
}
//=======================
// Read Two - Write One
//=======================
__kernel void R2W1(__global const float* restrict a,
__global const float* restrict b,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int halo)
{
int x = get_local_id(0) * VEC;
int gidx = get_group_id(0);
int y = get_global_id(1);
int bx = gidx * (BLOCK_X - 2 * halo);
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index] + b[index];
}
}
}
//=======================
// Read Three - Write One
//=======================
__kernel void R3W1(__global const float* restrict a,
__global const float* restrict b,
__global const float* restrict c,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int halo)
{
int x = get_local_id(0) * VEC;
int gidx = get_group_id(0);
int y = get_global_id(1);
int bx = gidx * (BLOCK_X - 2 * halo);
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index] + b[index] + c[index];
}
}
}
//=======================
// Read Two - Write Two
//=======================
__kernel void R2W2(__global const float* restrict a,
__global const float* restrict b,
__global float* restrict c,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int halo)
{
int x = get_local_id(0) * VEC;
int gidx = get_group_id(0);
int y = get_global_id(1);
int bx = gidx * (BLOCK_X - 2 * halo);
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
c[index] = a[index];
d[index] = b[index];
}
}
}
//=====================================================================
// Single Work-item Kernels
//=====================================================================
#else
//=======================
// Read One - Write One
//=======================
__attribute__((max_global_work_dim(0)))
__kernel void R1W1(__global const float* restrict a,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int dim_y,
const long loop_exit,
const int halo)
{
long cond = 0;
int x = 0;
int y = 0;
int bx = 0;
while (cond != loop_exit)
{
cond++;
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index];
}
}
x = (x + VEC) & (BLOCK_X - 1);
if (x == 0)
{
y++;
if (y == dim_y)
{
y = 0;
bx += BLOCK_X - 2 * halo;
}
}
}
}
//=======================
// Read Two - Write One
//=======================
__attribute__((max_global_work_dim(0)))
__kernel void R2W1(__global const float* restrict a,
__global const float* restrict b,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int dim_y,
const long loop_exit,
const int halo)
{
long cond = 0;
int x = 0;
int y = 0;
int bx = 0;
while (cond != loop_exit)
{
cond++;
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index] + b[index];
}
}
x = (x + VEC) & (BLOCK_X - 1);
if (x == 0)
{
y++;
if (y == dim_y)
{
y = 0;
bx += BLOCK_X - 2 * halo;
}
}
}
}
//=======================
// Read Three - Write One
//=======================
__attribute__((max_global_work_dim(0)))
__kernel void R3W1(__global const float* restrict a,
__global const float* restrict b,
__global const float* restrict c,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int dim_y,
const long loop_exit,
const int halo)
{
long cond = 0;
int x = 0;
int y = 0;
int bx = 0;
while (cond != loop_exit)
{
cond++;
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
d[index] = a[index] + b[index] + c[index];
}
}
x = (x + VEC) & (BLOCK_X - 1);
if (x == 0)
{
y++;
if (y == dim_y)
{
y = 0;
bx += BLOCK_X - 2 * halo;
}
}
}
}
//=======================
// Read Two - Write Two
//=======================
__attribute__((max_global_work_dim(0)))
__kernel void R2W2(__global const float* restrict a,
__global const float* restrict b,
__global float* restrict c,
__global float* restrict d,
const int pad,
const int pad_x,
const int dim_x,
const int dim_y,
const long loop_exit,
const int halo)
{
long cond = 0;
int x = 0;
int y = 0;
int bx = 0;
while (cond != loop_exit)
{
cond++;
int gx = bx + x - halo;
#pragma unroll
for (int i = 0; i < VEC; i++)
{
int real_x = gx + i;
long index = pad + y * (pad_x + dim_x) + (pad_x + real_x);
if (real_x >= 0 && real_x < dim_x)
{
c[index] = a[index];
d[index] = b[index];
}
}
x = (x + VEC) & (BLOCK_X - 1);
if (x == 0)
{
y++;
if (y == dim_y)
{
y = 0;
bx += BLOCK_X - 2 * halo;
}
}
}
}
#endif