A64: Synchronize with r16679.

src/ia32/disasm-ia32.cc

Index: src/ia32/disasm-ia32.cc
diff --git a/src/ia32/disasm-ia32.cc b/src/ia32/disasm-ia32.cc
index 293d42832ee1d0b4e3b94ff3d651d2a8aa86f49a..01fa9996456bf7e392b0168b24d489f9b5a4b95a 100644
--- a/src/ia32/disasm-ia32.cc
+++ b/src/ia32/disasm-ia32.cc
@@ -698,6 +698,7 @@ int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode,
   switch (escape_opcode) {
     case 0xD9: switch (regop) {
         case 0: mnem = "fld_s"; break;
+        case 2: mnem = "fst_s"; break;
         case 3: mnem = "fstp_s"; break;
         case 7: mnem = "fstcw"; break;
         default: UnimplementedInstruction();
@@ -743,7 +744,14 @@ int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode,
 
   switch (escape_opcode) {
     case 0xD8:
-      UnimplementedInstruction();
+      has_register = true;
+      switch (modrm_byte & 0xF8) {
+        case 0xC0: mnem = "fadd_i"; break;
+        case 0xE0: mnem = "fsub_i"; break;
+        case 0xC8: mnem = "fmul_i"; break;
+        case 0xF0: mnem = "fdiv_i"; break;
+        default: UnimplementedInstruction();
+      }
       break;
 
     case 0xD9:
@@ -767,6 +775,7 @@ int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode,
             case 0xEE: mnem = "fldz"; break;
             case 0xF0: mnem = "f2xm1"; break;
             case 0xF1: mnem = "fyl2x"; break;
+            case 0xF4: mnem = "fxtract"; break;
             case 0xF5: mnem = "fprem1"; break;
             case 0xF7: mnem = "fincstp"; break;
             case 0xF8: mnem = "fprem"; break;
@@ -815,6 +824,7 @@ int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode,
       has_register = true;
       switch (modrm_byte & 0xF8) {
         case 0xC0: mnem = "ffree"; break;
+        case 0xD0: mnem = "fst"; break;
         case 0xD8: mnem = "fstp"; break;
         default: UnimplementedInstruction();
       }
@@ -1448,6 +1458,7 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
         data += D1D3C1Instruction(data);
         break;
 
+      case 0xD8:  // fall through
       case 0xD9:  // fall through
       case 0xDA:  // fall through
       case 0xDB:  // fall through