diff --git a/disassembler/disassembler_x86.cc b/disassembler/disassembler_x86.cc
index 7551add..1848abe 100644
--- a/disassembler/disassembler_x86.cc
+++ b/disassembler/disassembler_x86.cc
@@ -558,14 +558,19 @@
         has_modrm = true;
         src_reg_file = dst_reg_file = SSE;
         break;
-      case 0x62:
+      case 0x60: case 0x61: case 0x62: case 0x6C:
         if (prefix[2] == 0x66) {
           src_reg_file = dst_reg_file = SSE;
           prefix[2] = 0;  // Clear prefix now. It has served its purpose as part of the opcode.
         } else {
           src_reg_file = dst_reg_file = MMX;
         }
-        opcode << "punpckldq";
+        switch (*instr) {
+          case 0x60: opcode << "punpcklbw"; break;
+          case 0x61: opcode << "punpcklwd"; break;
+          case 0x62: opcode << "punpckldq"; break;
+          case 0x6c: opcode << "punpcklqdq"; break;
+        }
         load = true;
         has_modrm = true;
         break;
@@ -650,7 +655,7 @@
         } else {
           dst_reg_file = MMX;
         }
-        static const char* x73_opcodes[] = {"unknown-73", "unknown-73", "psrlq", "unknown-73", "unknown-73", "unknown-73", "psllq", "unknown-73"};
+        static const char* x73_opcodes[] = {"unknown-73", "unknown-73", "psrlq", "psrldq", "unknown-73", "unknown-73", "psllq", "unknown-73"};
         modrm_opcodes = x73_opcodes;
         reg_is_opcode = true;
         has_modrm = true;
@@ -800,6 +805,18 @@
         opcode << "bswap";
         reg_in_opcode = true;
         break;
+      case 0xD4:
+        if (prefix[2] == 0x66) {
+          src_reg_file = dst_reg_file = SSE;
+          prefix[2] = 0;
+        } else {
+          src_reg_file = dst_reg_file = MMX;
+        }
+        opcode << "paddq";
+        prefix[2] = 0;
+        has_modrm = true;
+        load = true;
+        break;
       case 0xDB:
         if (prefix[2] == 0x66) {
           src_reg_file = dst_reg_file = SSE;
@@ -847,66 +864,14 @@
         has_modrm = true;
         load = true;
         break;
+      case 0xF4:
+      case 0xF6:
       case 0xF8:
-        if (prefix[2] == 0x66) {
-          src_reg_file = dst_reg_file = SSE;
-          prefix[2] = 0;  // clear prefix now it's served its purpose as part of the opcode
-        } else {
-          src_reg_file = dst_reg_file = MMX;
-        }
-        opcode << "psubb";
-        prefix[2] = 0;
-        has_modrm = true;
-        load = true;
-        break;
       case 0xF9:
-        if (prefix[2] == 0x66) {
-          src_reg_file = dst_reg_file = SSE;
-          prefix[2] = 0;  // clear prefix now it's served its purpose as part of the opcode
-        } else {
-          src_reg_file = dst_reg_file = MMX;
-        }
-        opcode << "psubw";
-        prefix[2] = 0;
-        has_modrm = true;
-        load = true;
-        break;
       case 0xFA:
-        if (prefix[2] == 0x66) {
-          src_reg_file = dst_reg_file = SSE;
-          prefix[2] = 0;  // clear prefix now it's served its purpose as part of the opcode
-        } else {
-          src_reg_file = dst_reg_file = MMX;
-        }
-        opcode << "psubd";
-        prefix[2] = 0;
-        has_modrm = true;
-        load = true;
-        break;
+      case 0xFB:
       case 0xFC:
-        if (prefix[2] == 0x66) {
-          src_reg_file = dst_reg_file = SSE;
-          prefix[2] = 0;  // clear prefix now it's served its purpose as part of the opcode
-        } else {
-          src_reg_file = dst_reg_file = MMX;
-        }
-        opcode << "paddb";
-        prefix[2] = 0;
-        has_modrm = true;
-        load = true;
-        break;
       case 0xFD:
-        if (prefix[2] == 0x66) {
-          src_reg_file = dst_reg_file = SSE;
-          prefix[2] = 0;  // clear prefix now it's served its purpose as part of the opcode
-        } else {
-          src_reg_file = dst_reg_file = MMX;
-        }
-        opcode << "paddw";
-        prefix[2] = 0;
-        has_modrm = true;
-        load = true;
-        break;
       case 0xFE:
         if (prefix[2] == 0x66) {
           src_reg_file = dst_reg_file = SSE;
@@ -914,7 +879,17 @@
         } else {
           src_reg_file = dst_reg_file = MMX;
         }
-        opcode << "paddd";
+        switch (*instr) {
+          case 0xF4: opcode << "pmuludq"; break;
+          case 0xF6: opcode << "psadbw"; break;
+          case 0xF8: opcode << "psubb"; break;
+          case 0xF9: opcode << "psubw"; break;
+          case 0xFA: opcode << "psubd"; break;
+          case 0xFB: opcode << "psubq"; break;
+          case 0xFC: opcode << "paddb"; break;
+          case 0xFD: opcode << "paddw"; break;
+          case 0xFE: opcode << "paddd"; break;
+        }
         prefix[2] = 0;
         has_modrm = true;
         load = true;