On 2014-02-17, at 07:26, John McKown wrote: > Freely downloadable. Entitled "A Closer Look at Instruction Set > Architectures" > > http://samples.jbpub.com/9781449600068/*00068_CH05_Null3e*.pdf > > looks interesting. Unfortunately, the book is $203. They have a epub > version for $103, but it is somehow "time limited" to 360 days. I guess it > somehow become unreadable after that. Too expensive for my limited budget. > What's the difference between the "freely downloadable" (as in beer?) .pdf and the $103 epub version?
> I was looking around to see what I could find regarding how actual computer > architects logically design an ISA. I can't really find much. I would > _love_ to know why the z designers created some of the instructions that > exist. And then basically warn about their poor performance. > A prime example should be the misaligned storage accesses that came with S/370. I suppose the tradeoff is between code size and speed. EX hardly counts; it's aboriginal S/360, when the relative cost of pipeline breakage was far less. -- gil
