mips-tdep.c: Use is_mips16_addr() to test for the MIPS16 mode

["Maciej W. Rozycki" <macro@mips.com>]

Hello,

 We have a function to check whether an address of instruction implies the 
MIPS16 mode or not.  However mips_next_pc() checks that directly.  Here is 
a fix.  No regressions for mipsisa32-sde-elf, with mips-sim-sde32/-EB and 
mips-sim-sde32/-mips16/-EB.

2007-07-20  Maciej W. Rozycki  <macro@mips.com>

	* mips-tdep.c (mips_next_pc): Use is_mips16_addr() instead of
	a direct test.

 OK to apply?

  Maciej

gdb-mips_next_pc.diff
Index: binutils-quilt/src/gdb/mips-tdep.c
===================================================================
--- binutils-quilt.orig/src/gdb/mips-tdep.c	2007-07-19 18:15:07.000000000 +0100
+++ binutils-quilt/src/gdb/mips-tdep.c	2007-07-19 18:27:51.000000000 +0100
@@ -1437,11 +1437,11 @@
    target monitor or stub is not developed enough to do a single_step.
    It works by decoding the current instruction and predicting where a
    branch will go. This isnt hard because all the data is available.
-   The MIPS32 and MIPS16 variants are quite different */
+   The MIPS32 and MIPS16 variants are quite different.  */
 static CORE_ADDR
 mips_next_pc (struct frame_info *frame, CORE_ADDR pc)
 {
-  if (pc & 0x01)
+  if (is_mips16_addr (pc))
     return mips16_next_pc (frame, pc);
   else
     return mips32_next_pc (frame, pc);