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#pragma once
#ifndef __OPENCV_CUDEV_WARP_WARP_HPP__
#define __OPENCV_CUDEV_WARP_WARP_HPP__
#include "../common.hpp"
namespace cv { namespace cudev {
//! @addtogroup cudev
//! @{
enum
{
LOG_WARP_SIZE = 5,
WARP_SIZE = 1 << LOG_WARP_SIZE
};
struct Warp
{
__device__ __forceinline__ static uint laneId()
{
uint ret;
asm("mov.u32 %0, %laneid;" : "=r"(ret));
return ret;
}
__device__ __forceinline__ static uint warpId()
{
const uint tid = (threadIdx.z * blockDim.y + threadIdx.y) * blockDim.x + threadIdx.x;
return tid / WARP_SIZE;
}
};
template <class It, typename T>
__device__ __forceinline__ void warpFill(It beg, It end, const T& value)
{
for(It t = beg + Warp::laneId(); t < end; t += WARP_SIZE)
*t = value;
}
template <class InIt, class OutIt>
__device__ __forceinline__ OutIt warpCopy(InIt beg, InIt end, OutIt out)
{
for(InIt t = beg + Warp::laneId(); t < end; t += WARP_SIZE, out += WARP_SIZE)
*out = *t;
return out;
}
template <class InIt, class OutIt, class UnOp>
__device__ __forceinline__ OutIt warpTransform(InIt beg, InIt end, OutIt out, const UnOp& op)
{
for(InIt t = beg + Warp::laneId(); t < end; t += WARP_SIZE, out += WARP_SIZE)
*out = op(*t);
return out;
}
template <class InIt1, class InIt2, class OutIt, class BinOp>
__device__ __forceinline__ OutIt warpTransform(InIt1 beg1, InIt1 end1, InIt2 beg2, OutIt out, const BinOp& op)
{
uint lane = Warp::laneId();
InIt1 t1 = beg1 + lane;
InIt2 t2 = beg2 + lane;
for(; t1 < end1; t1 += WARP_SIZE, t2 += WARP_SIZE, out += WARP_SIZE)
*out = op(*t1, *t2);
return out;
}
template<typename OutIt, typename T>
__device__ __forceinline__ void warpYota(OutIt beg, OutIt end, T value)
{
uint lane = Warp::laneId();
value += lane;
for(OutIt t = beg + lane; t < end; t += WARP_SIZE, value += WARP_SIZE)
*t = value;
}
//! @}
}}
#endif