Notes on computers, programming and all the stuff

An SSE code is more than 2 times faster on Core i7, and around 70% faster on Core i5. Read more...

The problem: there is a ordered dictionary containing only unique keys. Dictionary is read only, and keys are 32-bit (SSE) or 64-bit (AVX2...

Informal specification: __m128i mask_lower(const unsigned n) { assert(n < 16); switch (n) { case 0: return {0x00, ...

Sounds crazy, but it's possible in some cases . Here are experiments results - 3 times faster isn't so bad. list ...

Conversion numbers to hexadecimal representation - SWAR, plain SSE, and draft of BMI2 implementation. Article SSSE3: printing hex values...

SSE instruction PMOVMSKB gathers all most significant bits from bytes and stores them as a single 16-bit value; similar action is performed...

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

Intel announced new extension to SSE : instructions accelerating calculating hashes SHA-1 and SHA256. As everything else added recently to ...

Function itoa implemented with SSE instructions is about 3 times faster then scalar CPU version. Read more .

Peter Kankowski compared speed of SSE4.2 instructions crc32 and popcnt against software implementations. Hardware CRC32 is significantly...

With help of BSWAP instruction or SSE instructions ( PSHUFD , PSHUFLW , PSHUFHW ) or SSSE3 instruction ( PSHUFB ) reversing table can be fas...

Method presented here allows to get any bit permutation , transposition is just one of possible operations. Lookup-based approach would be f...