[2nd RFA] Make core dumps work on Irix

[Jim Kingdon <kingdon@panix.com>]

The enclosed patch makes GDB able to again read core dumps on Irix.
It broke some time after GDB 4.18 (which works).

Andrew Cagney is listed as the MIPS maintainer.

It was previously submitted as
http://sources.redhat.com/ml/gdb-patches/2001-02/msg00161.html and its
companion patch is
http://sources.redhat.com/ml/binutils/2001-02/msg00199.html

Index: mips-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.40
diff -u -r1.40 mips-tdep.c
--- mips-tdep.c	2001/02/08 06:03:53	1.40
+++ mips-tdep.c	2001/02/13 23:01:12
@@ -420,7 +420,15 @@
   if (mips64_transfers_32bit_regs_p)
     return REGISTER_VIRTUAL_SIZE (reg_nr);
   else
-    return MIPS_REGSIZE;
+    {
+      /* For MIPS_ABI_N32 (for example) we need 8 byte floating point
+         registers.  */
+      if (reg_nr >= FP0_REGNUM && reg_nr < FP0_REGNUM+32
+	  && FP_REGISTER_DOUBLE)
+	return 8;
+
+      return MIPS_REGSIZE;
+    }
 }
 
 int