Re: mspgcc "undefines" too-many-bits shifts in weird way
Paul Sokolovsky <[email protected]>
| Newsgroups | gmane.comp.hardware.texas-instruments.msp430.gcc.user |
|---|---|
| Message-ID | <20130423025612.7acbb2bb@x34f> |
Hello, On Tue, 23 Apr 2013 00:56:40 +0200 David Brown <[email protected]> wrote: > "Shift" does not have a "correct classification" or other "officially > correct" mathematical definition. It is not one of the standard > operations defined on integers. Of course it is - proceed to http://en.wikipedia.org/wiki/Logical_shift or open up your Computer Science book. (And of course, whenever we speak of integers in Computer Science, we speak of finite subset of math integers, and those map directly to bit vectors on which shift is defined). > So it does what you define it to do in the context. No, that's not how science works - there's one definition for one notion, "you" (as a subjective observer) is excluded. > But the compiler is calculating "(1 << 32)" as 0 > rather than 1. This is an inconsistency in the compiler, and > arguably it is /this/ target that is flawed, not the msp430 target. But of course, who might have thought of such outcome! ;-) [] -- Best regards, Paul mailto:[email protected] ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter