provides a mechanism for optimizing compilers to select the different Register configuration.

test/cctest/cctest.status

Index: test/cctest/cctest.status
diff --git a/test/cctest/cctest.status b/test/cctest/cctest.status
index 92627ac3d86686cf5b5d5cd42e940e998f327937..457aec2f1a974e47903c435326abe8cb52256cfb 100644
--- a/test/cctest/cctest.status
+++ b/test/cctest/cctest.status
@@ -296,7 +296,13 @@
 
 ##############################################################################
 ['arch == x87', {
-  'test-run-machops/RunFloat64InsertLowWord32': [SKIP]
+  'test-run-machops/RunFloat64InsertLowWord32': [SKIP],
+  'test-run-native-calls/Float32Select_registers': [SKIP],
+  'test-run-native-calls/Float64Select_registers': [SKIP],
+  'test-run-native-calls/MixedParams_0': [SKIP],
+  'test-run-native-calls/MixedParams_1': [SKIP],
+  'test-run-native-calls/MixedParams_2': [SKIP],
+  'test-run-native-calls/MixedParams_3': [SKIP],
 }],  # 'arch == x87'
 
 ##############################################################################