Add bsr to ia32 disassembler

runtime/vm/disassembler_ia32.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/disassembler.h"
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 #include "platform/utils.h"
 #include "vm/allocation.h"
@@ skipping 222 matching lines @@
     case 0xA2: return "cpuid";
     case 0x31: return "rdtsc";
     case 0xBE: return "movsx_b";
     case 0xBF: return "movsx_w";
     case 0xB6: return "movzx_b";
     case 0xB7: return "movzx_w";
     case 0xAF: return "imul";
     case 0xA5: return "shld";
     case 0xAD: return "shrd";
     case 0xAB: return "bts";
+    case 0xBD: return "bsr";
     case 0xB1: return "cmpxchg";
     case 0x50: return "movmskps";
     case 0x51: return "sqrtps";
     case 0x52: return "rqstps";
     case 0x53: return "rcpps";
     case 0x54: return "andps";
     case 0x56: return "orps";
     case 0x57: return "xorps";
     case 0x58: return "addps";
     case 0x59: return "mulps";
@@ skipping 1041 matching lines @@
 
       case 0x0F:
       { uint8_t f0byte = *(data+1);
         const char* f0mnem = F0Mnem(f0byte);
         if (f0byte == 0xA2 || f0byte == 0x31) {
           Print(f0mnem);
           data += 2;
         } else if ((f0byte & 0xF0) == 0x80) {
           data += JumpConditional(data, branch_hint);
         } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 ||
-                   f0byte == 0xB7 || f0byte == 0xAF) {
+                   f0byte == 0xB7 || f0byte == 0xAF || f0byte == 0xBD) {
           data += 2;
           data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data);
         } else if (f0byte == 0x57) {
           data += 2;
           int mod, regop, rm;
           GetModRm(*data, &mod, &regop, &rm);
           Print(f0mnem);
           Print(" ");
           PrintXmmRegister(regop);
           Print(",");
@@ skipping 506 matching lines @@
                                   pc);
     pc += instruction_length;
   }
 
   return;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32