Index: mips-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.539
diff -u -p -r1.539 mips-tdep.c
--- mips-tdep.c	10 Apr 2012 23:06:57 -0000	1.539
+++ mips-tdep.c	20 Apr 2012 18:50:40 -0000
@@ -1162,6 +1162,32 @@ mips32_bc1_pc (struct gdbarch *gdbarch, 
   return pc;
 }
 
+/* Return nonzero if the gdbarch is an Octeon series. */
+static int
+is_octeon (struct gdbarch *gdbarch)
+{
+  const struct bfd_arch_info *info = gdbarch_bfd_arch_info (gdbarch);
+
+  return (info->mach == bfd_mach_mips_octeon
+         || info->mach == bfd_mach_mips_octeonp
+         || info->mach == bfd_mach_mips_octeon2);
+}
+
+/* Return true if the OP represents the Octeon's BBIT instruction. */
+static int
+is_octeon_bbit_op (int op, struct gdbarch *gdbarch)
+{
+  if (!is_octeon (gdbarch))
+    return 0;
+  /* BBIT0 is encoded as LWC2: 110 010.  */
+  /* BBIT032 is encoded as LDC2: 110 110.  */
+  /* BBIT1 is encoded as SWC2: 111 010.  */
+  /* BBIT132 is encoded as SDC2: 111 110.  */
+  if (op == 50 || op == 54 || op == 58 || op == 62)
+    return 1;
+  return 0;
+}
+
 /* Determine where to set a single step breakpoint while considering
    branch prediction.  */
 static CORE_ADDR
@@ -1174,7 +1200,8 @@ mips32_next_pc (struct frame_info *frame
   if ((inst & 0xe0000000) != 0)		/* Not a special, jump or branch
 					   instruction.  */
     {
-      if (itype_op (inst) >> 2 == 5)
+      op = itype_op (inst);
+      if (op >> 2 == 5)
 	/* BEQL, BNEL, BLEZL, BGTZL: bits 0101xx */
 	{
 	  op = (itype_op (inst) & 0x03);
@@ -1192,18 +1219,18 @@ mips32_next_pc (struct frame_info *frame
 	      pc += 4;
 	    }
 	}
-      else if (itype_op (inst) == 17 && itype_rs (inst) == 8)
+      else if (op == 17 && itype_rs (inst) == 8)
 	/* BC1F, BC1FL, BC1T, BC1TL: 010001 01000 */
 	pc = mips32_bc1_pc (gdbarch, frame, inst, pc + 4, 1);
-      else if (itype_op (inst) == 17 && itype_rs (inst) == 9
+      else if (op == 17 && itype_rs (inst) == 9
 	       && (itype_rt (inst) & 2) == 0)
 	/* BC1ANY2F, BC1ANY2T: 010001 01001 xxx0x */
 	pc = mips32_bc1_pc (gdbarch, frame, inst, pc + 4, 2);
-      else if (itype_op (inst) == 17 && itype_rs (inst) == 10
+      else if (op == 17 && itype_rs (inst) == 10
 	       && (itype_rt (inst) & 2) == 0)
 	/* BC1ANY4F, BC1ANY4T: 010001 01010 xxx0x */
 	pc = mips32_bc1_pc (gdbarch, frame, inst, pc + 4, 4);
-      else if (itype_op (inst) == 29)
+      else if (op == 29)
 	/* JALX: 011101 */
 	/* The new PC will be alternate mode.  */
 	{
@@ -1213,6 +1240,21 @@ mips32_next_pc (struct frame_info *frame
 	  /* Add 1 to indicate 16-bit mode -- invert ISA mode.  */
 	  pc = ((pc + 4) & ~(CORE_ADDR) 0x0fffffff) + reg + 1;
 	}
+      else if (is_octeon_bbit_op (op, gdbarch))
+	{
+	  int bit, branch_if;
+
+	  branch_if = op == 58 || op == 62;
+	  bit = itype_rt (inst);
+	  if (op == 54 || op == 62)
+	    bit += 32;
+	  if (((get_frame_register_signed (frame,
+					   itype_rs (inst)) >> bit) & 1)
+              == branch_if)
+	    pc += mips32_relative_offset (inst) + 4;
+          else
+	    pc += 8;        /* After the delay slot.  */
+	}
       else
 	pc += 4;		/* Not a branch, next instruction is easy.  */
     }
@@ -5399,7 +5441,8 @@ mips32_instruction_has_delay_slot (struc
     {
       rs = itype_rs (inst);
       rt = itype_rt (inst);
-      return (op >> 2 == 5	/* BEQL, BNEL, BLEZL, BGTZL: bits 0101xx  */
+      return (is_octeon_bbit_op (op, gdbarch) 
+	      || op >> 2 == 5	/* BEQL, BNEL, BLEZL, BGTZL: bits 0101xx  */
 	      || op == 29	/* JALX: bits 011101  */
 	      || (op == 17
 		  && (rs == 8