LJAI is a personal chatbot hosted in my private server, available on the WeChat platform by searching 爱打滚的玲酱, and now available via the Web platform! What makes LJAI different is the virtual and real mapping of our own cat. Recently, we have acquired over 120 users, and thousands of chat messages. http://veritayuan.com/lingjiang Compared with the…
Exploration of the IEEE-754 Floating Point Standard
IEEE-754 Question: Execute the following while loops (modifying the code to add a counter). Explain the reasons these loops for the observed count value.
|
1 2 3 4 |
c = zeros(3,1); x = 1; while 1 + x > 1, x = x / 2, c(1) = c(1) + 1, end %53 x = 1; while x + x > x, x = 2 * x, c(2) = c(2) + 1, end %1024 x = 1; while x + x > x, x = x / 2, c(3) = c(3) + 1, end %1075 |
Solution The counter is 53, 1024, 1075 for the above three for loops. The code is attatched in 4.2. According to IEEE-754 (double precision), the machine epsilon is $2^{-52}$….
My CUDA Helper for Visual Studio
My CUDA Helper for Visual Studio
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
#pragma once #pragma comment(lib, "cudart.lib") #if _DEBUG #pragma comment(lib, "opencv_world330d.lib") #else #pragma comment(lib, "opencv_world330.lib") #endif #ifdef __CUDACC__ #define KERNEL_ARG2(grid, block) <<< grid, block >>> #define KERNEL_ARG3(grid, block, sh_mem) <<< grid, block, sh_mem >>> #define KERNEL_ARG4(grid, block, sh_mem, stream) <<< grid, block, sh_mem, stream >>> #else #define KERNEL_ARG2(grid, block) #define KERNEL_ARG3(grid, block, sh_mem) #define KERNEL_ARG4(grid, block, sh_mem, stream) #endif #ifdef __INTELLISENSE__ int __float_as_int(float in); float __int_as_float(int in); short __float2half_rn(float in); //Compare-and-Swap operation. unsigned int atomicInc(unsigned int* address, unsigned int val); int atomicCAS(int* address, int compare, int val); unsigned int atomicCAS(unsigned int* address, unsigned int compare, unsigned int val); unsigned long long int atomicCAS(unsigned long long int* address, unsigned long long int compare, unsigned long long int val); int atomicAdd(int* address, int val); unsigned int atomicAdd(unsigned int* address, unsigned int val); unsigned long long int atomicAdd(unsigned long long int* address, unsigned long long int val); float atomicAdd(float* address, float val); double atomicAdd(double* address, double val); int atomicSub(int* address, int val); unsigned int atomicSub(unsigned int* address, unsigned int val); template<class T> T tex2DLayered(cudaTextureObject_t texObj, float x, float y, int layer); template<class T> T tex2DLayered(cudaTextureObject_t texObj, int x, int y, int layer); template<class T> T tex2DLayered(texture<unsigned short, cudaTextureType2DLayered, cudaReadModeElementType> texObj, int x, int y, int layer); template<class T> T surf2DLayeredread(cudaSurfaceObject_t surfObj, int x, int y, int layer, boundaryMode = cudaBoundaryModeTrap); template<class T> void surf2DLayeredread(T data, cudaSurfaceObject_t surfObj, int x, int y, int layer, boundaryMode = cudaBoundaryModeTrap); template<class T> void surf3Dwrite(T data, cudaSurfaceObject_t surfObj, int x, int y, int z, boundaryMode = cudaBoundaryModeTrap); #define __syncthreads() #define __syncthreads_or(a) a template<class T> T tex3D(cudaTextureObject_t texObj, float x, float y, float z); template<class T> T tex3DLod(cudaTextureObject_t texObj, float x, float y, float z, float level); #endif |
Implementing Instagram Filters: Brannan, Earlybird
This series illustrate my shaders on Shadertoy.com, which renders Instagram filters in real time. Brannan Filter Brannan filter emphasizes the grey and green colors, and paints a metallic tint upon the photos. Click the mouse for comparison. I write this shader to stylize your photos in batch on my own ShaderToy renderer 🙂 (To be…
Slideshow
