Fix mod on ia32 without SSE2.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 229e8fc536599476abb765d3f82835cab8a3e455..6cd02338977eb0e5086375074b8e24bbef8786f3 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -1734,6 +1734,9 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
             FloatingPointHelper::ARGS_IN_REGISTERS);
         FloatingPointHelper::CheckFloatOperandsAreInt32(masm, &not_int32);
         if (op_ == Token::MOD) {
+          // The operands are now on the FPU stack, but we don't need them.
+          __ fstp(0);
+          __ fstp(0);
           GenerateRegisterArgsPush(masm);
           __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
         } else {