Hi!
I defined UNITS_PER_WORD as 1, but that alone did not change a thing as far
as I could see.
When I tried to define BITS_PER_UNIT as 32 it thown me out with Segmentation
fault and I can't
track the reason for it.
My porting is based on arc's and in arc it has the same effect
(Segmentation fault when BITS_PER_UNIT
defined as 32), so you can see the exact situation there.
The example I checked on is same as yours:
int *p;
void foo() { p++; }.
Any help will be appreciated.
Liza
-----Original Message-----
From: Ian Lance Taylor [mailto:ian@xxxxxxxx]
Sent: Thursday, February 03, 2005 7:07 PM
To: Liza Atkin
Subject: Re: Defining address's offset.
"Liza Atkin" <latkin@xxxxxxxxxxxx> writes:
Please reply to the list, not just to me. Thanks.
> Now here is the explanation of a particular case:
>
> load R2 0x8000000000
> load R2 0x8000000001
>
> Now, this is true that our machine uses 32-bit words, but when moving to
> next word
> we want to increase the address index by 1 only and not by 4 bytes.
>
> Or in your example:
> "
> int *p;
> void foo() { p++; }
>
> Then p might have the value, e.g., 0x100 before calling foo, and x0104
> after. "
> What I want is to get a value of 0x101 after.
In that case, you need to look at the definitions of BITS_PER_UNIT and
UNITS_PER_WORD.
The c4x port in the main sources does this kind of thing. Look at
gcc/config/c4x/c4x.h.
Ian
