Add several SIMD opcodes to IA32

src/ia32/assembler-ia32.cc

Index: src/ia32/assembler-ia32.cc
diff --git a/src/ia32/assembler-ia32.cc b/src/ia32/assembler-ia32.cc
index 021177478d0237a8debf0c0d2d6bf4db36a24491..c3195dc710f38442255dc23dc7e81c38eb2ecd6e 100644
--- a/src/ia32/assembler-ia32.cc
+++ b/src/ia32/assembler-ia32.cc
@@ -2864,6 +2864,14 @@ void Assembler::rorx(Register dst, const Operand& src, byte imm8) {
   EMIT(imm8);
 }
 
+void Assembler::sse2_instr(XMMRegister dst, const Operand& src, byte prefix,
+                           byte escape, byte opcode) {
+  EnsureSpace ensure_space(this);
+  EMIT(prefix);
+  EMIT(escape);
+  EMIT(opcode);
+  emit_sse_operand(dst, src);
+}
 
 void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) {
   Register ireg = { reg.code() };