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Abstract: Which instructions and addressing modes are used most often. What is the average instruction length. Created 16 years ago by Peter Kankowski Last changed 16 years ago Filed under Assembly language and machine code Which instruction is the most common one in your code? In this test, three popular open-source applications were disassembled and analysed with a Basic script: 7-Zip archiver (
Abstract: Exploring new instructions in Core i7/i5. Created 14 years ago by Peter Kankowski Last changed 14 years ago Contributors: Dmitry Kostjuchenko, Marat Dukhan, and Subbu N Filed under Low-level code optimization Recent Intel processors (Core i7/i5) can calculate CRC-32C and bit count in hardware. With other domain-specific instructions (string handling, AES encryption) in SSE 4.2, it may se
Abstract: Using new Intel Core i7 instructions to speed up string manipulation. Created 16 years ago by Peter Kankowski Last changed 15 years ago Contributors: Dap and Adam Messinger Filed under Low-level code optimization The new instructions SSE 4.2 introduces four instructions (PcmpEstrI, PcmpEstrM, PcmpIstrI, and PcmpIstrM) that can be used to speed up text processing code (including strcmp, m
Abstract: Benchmark program for hash tables and comparison of 15 popular hash functions. Created 16 years ago by Peter Kankowski Last changed 4 years ago Contributors: Nils, Ace, Won, Andrew M., and Georgi 'Sanmayce' Filed under Algorithms Hash tables are popular data structures for storing key-value pairs. A hash function is used to map the key value (usually a string) to array index. The functio
How to find words by their prefix, which can be mistyped, and sort them by frequency stored with the word. 12 years ago Intel® Architecture Instruction Set Extensions Programming Reference (PDF reference). The description of new instructions in the upcoming Haswell processor, including transactional memory support, hardware random number generator, and 256-bit vector integer operations. The transa
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