Maneesh Gupta
275 行
8.9 KiB
C++
275 行
8.9 KiB
C++
/*
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Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
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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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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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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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//#pragma once
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#ifndef HIP_TEXTURE_H
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#define HIP_TEXTURE_H
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/**
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* @file hcc_detail/hip_texture.h
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* @brief HIP C++ Texture API for hcc compiler
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*/
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#include <limits.h>
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#include <hip/hip_runtime.h>
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//----
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//Texture - TODO - likely need to move this to a separate file only included with kernel compilation.
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#define hipTextureType1D 1
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typedef enum {
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hipChannelFormatKindSigned = 0,
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hipChannelFormatKindUnsigned,
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hipChannelFormatKindFloat,
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hipChannelFormatKindNone
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} hipChannelFormatKind;
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typedef struct hipChannelFormatDesc {
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int x;
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int y;
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int z;
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int w;
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hipChannelFormatKind f;
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} hipChannelFormatDesc;
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typedef enum hipTextureReadMode
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{
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hipReadModeElementType, ///< Read texture as specified element type
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//! @warning cudaReadModeNormalizedFloat is not supported.
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} hipTextureReadMode;
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typedef enum hipTextureFilterMode
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{
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hipFilterModePoint, ///< Point filter mode.
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//! @warning cudaFilterModeLinear is not supported.
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} hipTextureFilterMode;
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struct textureReference {
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hipTextureFilterMode filterMode;
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bool normalized;
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hipChannelFormatDesc channelDesc;
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};
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#if __cplusplus
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template <class T, int texType=hipTextureType1D, enum hipTextureReadMode=hipReadModeElementType>
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struct texture : public textureReference {
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const T * _dataPtr; // pointer to underlying data.
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//texture() : filterMode(hipFilterModePoint), normalized(false), _dataPtr(NULL) {};
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unsigned int width;
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unsigned int height;
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};
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#endif
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typedef struct hipArray {
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unsigned int width;
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unsigned int height;
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hipChannelFormatKind f;
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void* data; //FIXME: generalize this
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} hipArray;
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#define tex1Dfetch(_tex, _addr) (_tex._dataPtr[_addr])
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#define tex2D(_tex, _dx, _dy) \
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_tex._dataPtr[(unsigned int)_dx + (unsigned int)_dy*(_tex.width)]
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hipError_t hipMallocArray(hipArray** array, const hipChannelFormatDesc* desc,
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size_t width, size_t height = 0, unsigned int flags = 0);
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hipError_t hipFreeArray(hipArray* array);
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//
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// dpitch, spitch, and width in bytes
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hipError_t hipMemcpy2D(void* dst, size_t dpitch, const void* src, size_t spitch, size_t width, size_t height, hipMemcpyKind kind);
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// wOffset, width, and spitch in bytes
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hipError_t hipMemcpy2DToArray(hipArray* dst, size_t wOffset, size_t hOffset, const void* src,
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size_t spitch, size_t width, size_t height, hipMemcpyKind kind);
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hipError_t hipMemcpyToArray(hipArray* dst, size_t wOffset, size_t hOffset,
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const void* src, size_t count, hipMemcpyKind kind);
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/**
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* @addtogroup API HIP API
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* @{
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*
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* Defines the HIP API. See the individual sections for more information.
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*/
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// These are C++ APIs - maybe belong in separate file.
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/**
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*-------------------------------------------------------------------------------------------------
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*-------------------------------------------------------------------------------------------------
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* @defgroup Texture Texture Reference Management
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* @{
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*
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*
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* @warning The HIP texture API implements a small subset of full texture API. Known limitations include:
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* - Only point sampling is supported.
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* - Only C++ APIs are provided.
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* - Many APIs and modes are not implemented.
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*
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* The HIP texture support is intended to allow use of texture cache on hardware where this is beneficial.
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*
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* The following CUDA APIs are not currently supported:
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* - cudaBindTexture2D
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* - cudaBindTextureToArray
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* - cudaBindTextureToMipmappedArray
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* - cudaGetChannelDesc
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* - cudaGetTextureReference
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*
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*/
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// C API:
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#if 0
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hipChannelFormatDesc hipBindTexture(size_t *offset, struct textureReference *tex, const void *devPtr, const struct hipChannelFormatDesc *desc, size_t size=UINT_MAX)
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{
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tex->_dataPtr = devPtr;
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}
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#endif
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/*
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* @brief Returns a channel descriptor with format f and number of bits of each ocmponent x,y,z and w.
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*
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* @par Parameters
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* None.
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* @return Channel descriptor
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*
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*
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**/
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hipChannelFormatDesc hipCreateChannelDesc(int x, int y, int z, int w, hipChannelFormatKind f);
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// descriptors
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template <typename T> inline hipChannelFormatDesc hipCreateChannelDesc() {
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return hipCreateChannelDesc(0, 0, 0, 0, hipChannelFormatKindNone);
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}
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template <> inline hipChannelFormatDesc hipCreateChannelDesc<int>() {
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int e = (int)sizeof(int) * 8;
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return hipCreateChannelDesc(e, 0, 0, 0, hipChannelFormatKindSigned);
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}
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template <> inline hipChannelFormatDesc hipCreateChannelDesc<unsigned int>() {
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int e = (int)sizeof(unsigned int) * 8;
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return hipCreateChannelDesc(e, 0, 0, 0, hipChannelFormatKindUnsigned);
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}
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template <> inline hipChannelFormatDesc hipCreateChannelDesc<long>() {
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int e = (int)sizeof(long) * 8;
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return hipCreateChannelDesc(e, 0, 0, 0, hipChannelFormatKindSigned);
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}
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template <> inline hipChannelFormatDesc hipCreateChannelDesc<unsigned long>() {
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int e = (int)sizeof(unsigned long) * 8;
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return hipCreateChannelDesc(e, 0, 0, 0, hipChannelFormatKindUnsigned);
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}
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template <> inline hipChannelFormatDesc hipCreateChannelDesc<float>() {
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int e = (int)sizeof(float) * 8;
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return hipCreateChannelDesc(e, 0, 0, 0, hipChannelFormatKindFloat);
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}
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/*
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* @brief hipBindTexture Binds size bytes of the memory area pointed to by @p devPtr to the texture reference tex.
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*
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* @p desc describes how the memory is interpreted when fetching values from the texture. The @p offset parameter is an optional byte offset as with the low-level
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* hipBindTexture() function. Any memory previously bound to tex is unbound.
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*
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* @param[in] offset - Offset in bytes
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* @param[out] tex - texture to bind
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* @param[in] devPtr - Memory area on device
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* @param[in] desc - Channel format
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* @param[in] size - Size of the memory area pointed to by devPtr
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* @return #hipSuccess, #hipErrorInvalidValue, #hipErrorMemoryFree, #hipErrorUnknown
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**/
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template <class T, int dim, enum hipTextureReadMode readMode>
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hipError_t hipBindTexture(size_t *offset,
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struct texture<T, dim, readMode> &tex,
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const void *devPtr,
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const struct hipChannelFormatDesc *desc,
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size_t size=UINT_MAX)
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{
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tex._dataPtr = static_cast<const T*>(devPtr);
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return hipSuccess;
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}
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/*
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* @brief hipBindTexture Binds size bytes of the memory area pointed to by @p devPtr to the texture reference tex.
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*
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* @p desc describes how the memory is interpreted when fetching values from the texture. The @p offset parameter is an optional byte offset as with the low-level
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* hipBindTexture() function. Any memory previously bound to tex is unbound.
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*
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* @param[in] offset - Offset in bytes
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* @param[in] tex - texture to bind
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* @param[in] devPtr - Memory area on device
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* @param[in] size - Size of the memory area pointed to by devPtr
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* @return #hipSuccess, #hipErrorInvalidValue, #hipErrorMemoryFree, #hipErrorUnknown
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**/
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template <class T, int dim, enum hipTextureReadMode readMode>
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hipError_t hipBindTexture(size_t *offset,
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struct texture<T, dim, readMode> &tex,
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const void *devPtr,
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size_t size=UINT_MAX)
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{
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return hipBindTexture(offset, tex, devPtr, &tex.channelDesc, size);
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}
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template <class T, int dim, enum hipTextureReadMode readMode>
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hipError_t hipBindTextureToArray(struct texture<T, dim, readMode> &tex, hipArray* array) {
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tex.width = array->width;
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tex.height = array->height;
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tex._dataPtr = static_cast<const T*>(array->data);
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return hipSuccess;
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}
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/*
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* @brief Unbinds the textuer bound to @p tex
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*
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* @param[in] tex - texture to unbind
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*
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* @return #hipSuccess
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**/
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template <class T, int dim, enum hipTextureReadMode readMode>
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hipError_t hipUnbindTexture(struct texture<T, dim, readMode> &tex)
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{
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tex._dataPtr = NULL;
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return hipSuccess;
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}
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// doxygen end Texture
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/**
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* @}
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*/
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// End doxygen API:
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/**
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* @}
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*/
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#endif
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