[ia32] Better code generation for materialization of float/double constants.

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 5e8333d11a7ca9539ef343c5ae80524fb43b2c1b..7a9b963488b7909f0143dd06003d2d0eafc52b1d 100644
--- a/src/ia32/assembler-ia32.cc
+++ b/src/ia32/assembler-ia32.cc
@@ -2381,6 +2381,26 @@ void Assembler::ptest(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::pslld(XMMRegister reg, int8_t shift) {
+  EnsureSpace ensure_space(this);
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0x72);
+  emit_sse_operand(esi, reg);  // esi == 6
+  EMIT(shift);
+}
+
+
+void Assembler::psrld(XMMRegister reg, int8_t shift) {
+  EnsureSpace ensure_space(this);
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0x72);
+  emit_sse_operand(edx, reg);  // edx == 2
+  EMIT(shift);
+}
+
+
 void Assembler::psllq(XMMRegister reg, int8_t shift) {
   EnsureSpace ensure_space(this);
   EMIT(0x66);