Notes on computers, programming and all the stuff

First we read: 21.4.1 basic_string general requirements [string.require] [...] 3 No erase() or pop_back() member function shall throw ...

Rabin-Karp algorithm uses a weak hash function to locate possible substring positions. This modification uses merely equality of first and...

Starting from GCC 4.5 the asm statement has new form: asm goto . Programmer can use any labels from C/C++ program, however output from this ...

Fast calculate ceil(log10(x)) of some unsigned number is described on Bit Twiddling Hacks , this text show the SIMD solution for 32-bit numb...

The description of Determine if a word has a zero byte from "Bit Twiddling Hacks" says about haszero(v) : " the result is th...

I've observed that some patterns issued to strstr cause significant slowdown. Sample program kill-strstr.c executes strstr(data, pa...

SSE provides not widely known control register, called MXCSR . This register plays three roles: controls calculations: flag "flush...