[Patch, moxie, sim] Add new sign-extension instructions

[Anthony Green <green@moxielogic.com>]

I'm committing the following patch that adds support for two new
sign-extension instructions to the moxie simulator.  Binutils and GCC
changes have already been committed.

Thanks,

AG

2014-04-02  Anthony Green  <green@moxielogic.com>

	* interp.c (sim_resume): Add new sign-extend instructions.


diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c
index a3f238a..4362c66 100644
--- a/sim/moxie/interp.c
+++ b/sim/moxie/interp.c
@@ -586,8 +586,24 @@ sim_resume (sd, step, siggnal)
 	      break;
 	    case 0x0f: /* nop */
 	      break;
-	    case 0x10: /* bad */
-	    case 0x11: /* bad */
+	    case 0x10: /* sex.b */
+	      {
+		int a = (inst >> 4) & 0xf;
+		int b = inst & 0xf;
+		signed char bv = cpu.asregs.regs[b];
+		TRACE("sex.b");
+		cpu.asregs.regs[a] = (int) bv;
+	      }
+	      break;
+	    case 0x11: /* sex.s */
+	      {
+		int a = (inst >> 4) & 0xf;
+		int b = inst & 0xf;
+		signed short bv = cpu.asregs.regs[b];
+		TRACE("sex.s");
+		cpu.asregs.regs[a] = (int) bv;
+	      }
+	      break;
 	    case 0x12: /* bad */
 	    case 0x13: /* bad */
 	    case 0x14: /* bad */