Add zex instruction support for moxie port

diff --git a/sim/moxie/ChangeLog b/sim/moxie/ChangeLog
index f168fc6..d3331c6 100644 (file)
--- a/sim/moxie/ChangeLog
+++ b/sim/moxie/ChangeLog
@@ -1,3 +1,7 @@
+2014-12-12  Anthony Green  <green@moxielogic.com>
+
+       * interp.c (sim_resume): Add zex instructions.
+
 2014-08-19  Alan Modra  <amodra@gmail.com>
 
        * configure: Regenerate.

diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c
index 4362c66..fdb6528 100644 (file)
--- a/sim/moxie/interp.c
+++ b/sim/moxie/interp.c
@@ -604,8 +604,24 @@ sim_resume (sd, step, siggnal)
                cpu.asregs.regs[a] = (int) bv;
              }
              break;
-           case 0x12: /* bad */
-           case 0x13: /* bad */
+           case 0x12: /* zex.b */
+             {
+               int a = (inst >> 4) & 0xf;
+               int b = inst & 0xf;
+               signed char bv = cpu.asregs.regs[b];
+               TRACE("zex.b");
+               cpu.asregs.regs[a] = (int) bv & 0xff;
+             }
+             break;
+           case 0x13: /* zex.s */
+             {
+               int a = (inst >> 4) & 0xf;
+               int b = inst & 0xf;
+               signed short bv = cpu.asregs.regs[b];
+               TRACE("zex.s");
+               cpu.asregs.regs[a] = (int) bv & 0xffff;
+             }
+             break;
            case 0x14: /* bad */
            case 0x15: /* bad */
            case 0x16: /* bad */