diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index ea160c8..42c2541 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -913,6 +913,78 @@
 }
 
 
+void X86Assembler::paddusb(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDC);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::paddsb(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEC);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::paddusw(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDD);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::paddsw(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xED);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::psubusb(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xD8);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::psubsb(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xE8);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::psubusw(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xD9);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::psubsw(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xE9);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
 void X86Assembler::cvtsi2ss(XmmRegister dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF3);