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

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 4532a67065cd8ff72be056b252714bdb2c5fead7..3cab0e444df0345a248a3655b498c9d08ce1ef94 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -1024,6 +1024,8 @@ class Assembler : public AssemblerBase {
   void por(XMMRegister dst, XMMRegister src);
   void ptest(XMMRegister dst, XMMRegister src);
 
+  void pslld(XMMRegister reg, int8_t shift);
+  void psrld(XMMRegister reg, int8_t shift);
   void psllq(XMMRegister reg, int8_t shift);
   void psllq(XMMRegister dst, XMMRegister src);
   void psrlq(XMMRegister reg, int8_t shift);