DS-5 data type definitions

Hi,

I'm looking for a list of definitions of each of the data types which are appended to the end of values for ARM DS-5 v5.20.1. I have looked and searched the ARM DS-5 v5.20.1 documentation to no avail.

For example in 0xFFFFFFFFU how does the compiler interpret 'U'? Does it just indicate that the value is unsigned, or does it also specify size such as a word? Other appended characters include f for float, d for double, etc.

Thanks in advance,

Ryan