A64: When truncating to an int, store the result in a 64bit register

test/cctest/test-assembler-a64.cc

Index: test/cctest/test-assembler-a64.cc
diff --git a/test/cctest/test-assembler-a64.cc b/test/cctest/test-assembler-a64.cc
index 3597927443b3f2e6147e05bf25e54f90cca4e9a9..63237bc2d2d90fb9153f43de2325edb03f6d1113 100644
--- a/test/cctest/test-assembler-a64.cc
+++ b/test/cctest/test-assembler-a64.cc
@@ -9352,21 +9352,15 @@ static void ECMA262ToInt32Helper(int32_t expected, double input) {
 
   __ Fmov(d0, input);
 
-  __ ECMA262ToInt32(x0, d0, x10, x11, MacroAssembler::INT32_IN_W);
-  __ ECMA262ToInt32(x1, d0, x10, x11, MacroAssembler::INT32_IN_X);
+  __ ECMA262ToInt32(x1, d0, x10, x11, MacroAssembler::INT32);
   __ ECMA262ToInt32(x2, d0, x10, x11, MacroAssembler::SMI);
 
-  // The upper bits of INT32_IN_W are undefined, so make sure we don't try to
-  // test them.
-  __ Mov(w0, w0);
-
   END();
 
   RUN();
 
   int64_t expected64 = expected;
 
-  ASSERT_EQUAL_32(expected, w0);
   ASSERT_EQUAL_64(expected64, x1);
   ASSERT_EQUAL_64(expected64 << kSmiShift | kSmiTag, x2);