/*Set buffer with specific value using memset in C - Example of memset()*/ #include <stdio.h> #include <string.h> int main() { unsigned char buffer[10]={0}; int i; printf("buffer: %s\n",buffer); //set value with space memset(buffer,' ', 9); //last byte should be null ...
align jmp _VEC_memzero ; use fast zero SSE2 implementation ; no return ; Align address on dword boundarydword_align: push edi ; preserve edi mov edi,ecx ; edi = dest pointer cmp edx,4 ; if it's less then 4 bytes jb tail ; ...
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In their implementation in the C++ Standard Template Library, priority queues take three template parameters:1 2 template < class T, class Container = vector<T>, class Compare = less<typename Container::value_type> > class priority_queue; Where the template parameters have the following meanings:...
UPDATE: Ilya Albrecht landed the memset implementation from this repo into Folly. This repository contains high-performance implementations of memset and memcpy. These implementations outperform the folly and glibc implementations. This repository contains several reference implementations in C and assembly. ...
For Roc's purposes, I predict they can start by directly depending on the std lib API, however, inevitably they will want to make some enhancement or fix some bug, and then will be forced to copy the implementation into their codebase. However, if they are diligent in upstreaming those ...
The implementation also has a neat trick. In cases where the size of the original buffer is big enough, the trailing bytes of the buffer can be set with a single (possibly unaligned) store operation. The end address of the buffer is computed, and 8 (or 16) bytes is subtracted from it...
I assume your library memcpy implementation still uses STM for internal RAM, but other instructions when copying in SDRAM." Yes, you need to ensure that there are no burst writes (combination of STM instructions) to exter...
I am aware that utilizing memcpy and memset is discouraged, but I have yet to grasp the proper implementation in C++, preferably without using std. Usingmemcpyandmemsetis acceptable when it is suitable. There is no reason to consider it unacceptable. ...
no implementation of float for which it won't work. In the usual case, floating point numbers only need a small subset of the bits set to zero for the number overall to have the value zero -- if these bits are zero, the rest of the bits are ignored. As I said above, _in theory...