RFA/PATCH: gas support for $ prefix for hex literals

[Frank Ch. Eigler]

Hi -

I believe the following patch is a reasonable way to implement support
for `$'-prefixing for hexadecimal literals.  (For the target of my interest,
`$' chars won't appear in identifiers.)  May I commit?  Comments?

- FChE

2000-06-22  Frank Ch. Eigler  <fche@redhat.com>

	* expr.c (operand): Permit $hex literals if LITERAL_PREFIXDOLLAR_HEX
	is defined.

Index: expr.c
===================================================================
RCS file: /cvs/src/src/gas/expr.c,v
retrieving revision 1.17
diff -c -p -r1.17 expr.c
*** expr.c	2000/06/19 01:22:39	1.17
--- expr.c	2000/06/22 15:35:41
*************** operand (expressionP)
*** 820,825 ****
--- 820,831 ----
                          expressionP);
        break;
  
+ #ifdef LITERAL_PREFIXDOLLAR_HEX
+     case '$':
+       integer_constant (16, expressionP);
+       break;
+ #endif
+ 
      case '0':
        /* non-decimal radix */