[Bug gas/13084] x86 assembler silently truncates 64bit value

[michael.v.zolotukhin at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13084



--- Comment #6 from Michael Zolotukhin <michael.v.zolotukhin at gmail dot com> 
2012-09-23 15:17:07 UTC ---

(In reply to comment #5)

> (In reply to comment #4)

> > If working with 64-bit values is incorrect in x32-mode, then we also need to

> > fix tests from gas/i386/ilp32/x86-64.s - as they are mostly copied from 
> > 64-bit

> > tests, they contain a lot of 64-bit values.

> > Am I getting it correctly that we need to use only 32-bit values in this 
> > test

> > too?

> 

> Which specific tests do you want to change?  We only want to issue

> an error instead of silently truncating 64bit value.  Other 64-bit

> values are OK.



Oh, I see. I just changed integer_constant function to disallow 64-bit constant

in x32 mode and got fails on instructions like this:

movq %rax,0xffffffffff332211

from gas/testsuite/gas/i386/ilp32/x86-64.s

Now I see that it's incorrect, and we need to disallow such values only if they

are going to be truncated when stored in symbol table.



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