On 4/29/2012 8:51 AM, Georg-Johann Lay wrote:
Peter Bigot a écrit:
The MSP430's split address space and ISA make it expensive to place
data above the 64 kB boundary, but cheap to place code there. So I'm
looking for a way to use HImode for data pointers, but PSImode for
function pointers. If gcc supports this, it's not obvious how.
I get partway there with FUNCTION_MODE and some hacks for the case
where the called object is a symbol, but not when it's a
pointer-to-function data object.
I don't think it's a good solution to use different pointer sizes.
You will run into all sorts of trouble -- both in the application and
in GCC.
Just to be clear, there is nothing in the standard that forbids the
sizes being different AFAIK? I understand that both gcc and apps
may make unwarranted assumptions.
