x86 validator: Implement rewriting "movntq" to "movq" on x86-64

src/trusted/validator/validation_rewrite_test.cc

Index: src/trusted/validator/validation_rewrite_test.cc
diff --git a/src/trusted/validator/validation_rewrite_test.cc b/src/trusted/validator/validation_rewrite_test.cc
index e1d1bace2f497afae7ee2b6a2515fdc4863a8a77..a392f697cfd77ac52ebdd617bc48664335ea6e8c 100644
--- a/src/trusted/validator/validation_rewrite_test.cc
+++ b/src/trusted/validator/validation_rewrite_test.cc
@@ -44,6 +44,7 @@ DECLARE_TEMPLATE(prefetchnta_code)
 DECLARE_TEMPLATE(off_webstore_movnt_code)
 DECLARE_TEMPLATE(prefetchnta_code)
 DECLARE_TEMPLATE(prefetchnta_rip_relative_code)
+DECLARE_TEMPLATE(movntq_code)
 DECLARE_TEMPLATE(movntps_code)
 DECLARE_TEMPLATE(movnti_code)
 DECLARE_TEMPLATE(movnti_code2)
@@ -138,6 +139,10 @@ TEST_F(ValidationMovntRewriteTests, RewritePrefetchntaRipRelative) {
   TestRewrite(&t_prefetchnta_rip_relative_code);
 }
 
+TEST_F(ValidationMovntRewriteTests, RewriteMovntq) {
+  TestRewrite(&t_movntq_code);
+}
+
 TEST_F(ValidationMovntRewriteTests, RewriteMovntps) {
   TestRewrite(&t_movntps_code);
 }