Add X87 implementations for Integer32ToDouble, DoubleToI, DoubleToSmi

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 7bea37302589ed52c1759d7f3abb268b5b1ab5d2..37218e54dd99bf6e40b83cd04ad5a746d353a42e 100644
--- a/src/ia32/assembler-ia32.cc
+++ b/src/ia32/assembler-ia32.cc
@@ -1641,6 +1641,13 @@ void Assembler::fstp_s(const Operand& adr) {
 }
 
 
+void Assembler::fst_s(const Operand& adr) {
+  EnsureSpace ensure_space(this);
+  EMIT(0xD9);
+  emit_operand(edx, adr);
+}
+
+
 void Assembler::fstp_d(const Operand& adr) {
   EnsureSpace ensure_space(this);
   EMIT(0xDD);