On Tuesday 10 March 2009, DJ Delorie wrote: > One of our customers has a chip with memory-mapped peripheral > registers that need to be accessed in a specific mode. The registers > represent bitfields within the hardware, so a volatile struct is an > obvious choice to represent them in C. > > Comments? Alternatives?
PR23623 (I suspect the status on that bug is incorrect, it's nt actually fixed). The ARM EABI defines semantics for volatile bitfields, and gcc gets this wrong. Paul
