On Tue, Apr 4, 2017 at 4:46 AM, Andreas Krebbel <kreb...@linux.vnet.ibm.com> wrote: > On 04/03/2017 06:18 PM, Eric Botcazou wrote: >>> On S/390 UNITS_PER_WORD is: >>> 8 with -m64 >>> 4 with -m31 >>> 8 with -m31 -mzarch >>> >>> This has been chosen to support use of 64 bit registers also in 32 bit >>> code. Code compiled with -m31 -mzarch is supposed to adhere to the 32 >>> bit ABI. In order to make that work it was required to prevent >>> UNITS_PER_WORD from being used in ABI-relevant contexts. That's why >>> Ulrich added the TARGET_UNWIND_WORD_MODE in 2008 (for SPU). >> >> We do that for 32-bit SPARC on Solaris (-mv8plus) but UNITS_PER_WORD is 4. >> >>> Now I could either fix this by reverting that change for S/390 >>> (similiar to what Andreas Schwab did to fix the BZ) or I could just >>> use the size of the long data type (as we do in the ABI-relevant parts >>> of the backend as well). Which one do you prefer? >> >> Having System.Word_Size != Standard'Word_Size is a bit disturbing. Does it >> work to change only Memory_Size to 2 ** Long_Integer'Size? This will also >> correct the definition of Address below. > > This worked as well. I've committed the following patch: > > gcc/ada/ChangeLog: > > 2017-04-04 Andreas Krebbel <kreb...@linux.vnet.ibm.com> > > * system-linux-s390.ads: Use Long_Integer'Size to define > Memory_Size. > --- > gcc/ada/system-linux-s390.ads | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/gcc/ada/system-linux-s390.ads b/gcc/ada/system-linux-s390.ads > index 485a8de..9bf8375 100644 > --- a/gcc/ada/system-linux-s390.ads > +++ b/gcc/ada/system-linux-s390.ads > @@ -70,7 +70,7 @@ package System is > > Storage_Unit : constant := 8; > Word_Size : constant := Standard'Word_Size; > - Memory_Size : constant := 2 ** Word_Size; > + Memory_Size : constant := 2 ** Long_Integer'Size; > > -- Address comparison >
X32 needs something similar: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80626 -- H.J.
