On Tue, 9 Jul 2013 15:30:12 -0400, Richard Verville <[email protected]> asked:
> Has anyone done benchmarks on different scenarios with instructions with immediate & relative instructions versus the old instructions. <snip> The more important issue is memory access: CPU speeds have increased much faster than memory speeds. There is no memory pentaly for immediate operands, while memory references can be quite costly: an item taken from memory can displace other items in the data cache, or they might cross a cache-line or memory-page boundary, or require paging. A memory reference can take anywhere from a few cycles to many thousands, so if your processor supports useful immediate operands, take advantage. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
