[AArch64] Binutils/gas/ld port for ARM's new 64-bit architecture, AArch64 [4/6] gas changes

[nick clifton]

Hi Yufeng Zhang,

   I was not very happy with the code in tc-aarch64.c.  Specifically 
there are lots of places where functions return an integer when really 
they are returning a boolean true/false or pass/fail result.  It would 
be far more appropriate for these functions to use bfd_boolean as their 
return type.

   Even more confusing, there are some functions that return 0 to 
indicate success and 1 to indicate failure, but their name implies that 
the result would be the other way around.  For example I would expect 
code like this:

   if (my_get_expression (&inst.reloc.exp, &p, GE_OPT_PREFIX, 1))
     return FAIL;

to actually be coded like this:

   if (! my_get_expression (&inst.reloc.exp, &p, GE_OPT_PREFIX, 1))
     return FAIL;

so that is reads as "if my_get_expression failed then return FAIL".


Ideally I would very much like to see this port included in the new 2.23 
branch, so if you do not have the time to correct this behaviour then I 
will understand.  But if you *do* have the time, I would appreciate the 
effort.

Cheers
   Nick