PPC/S390: Disable failing wasm-spec-tests

test/wasm-spec-tests/wasm-spec-tests.status

 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 [
 [ALWAYS, {
   #TODO(ahaas): Add additional stack checks on mips.
   # Issue 6318: Stack checks for functions with huge stack frames fail on x64 and ia32
   'tests/skip-stack-guard-page': [PASS, ['arch == mipsel or arch == mips64el or arch == x64 or arch == ia32', SKIP]],
 }],  # ALWAYS
@@ skipping 12 matching lines @@
   # This test fail because mips does not support the correct NaN bit patterns.
   # But it doesn't fail in simulator.
   'tests/conversions': [SKIP],
 }],  # '(arch == mipsel or arch == mips64el or arch == mips or arch == mips64) and not simulator_run'
 
 ['arch == arm and not simulator_run', {
   # Too slow on chromebooks.
   'tests/br_table': [SKIP],
 }],  # 'arch == arm and not simulator_run'
 
+['arch == ppc or arch == ppc64', {
+  # These tests fail because ppc float min and max doesn't convert sNaN to qNaN.
+  'tests/f32': [SKIP],
+  'tests/f64': [SKIP],
+  # This test fails because ppc float to double doesn't convert sNaN to qNaN.
+  'tests/conversions': [SKIP],
+}],  # 'arch == ppc or arch == ppc64'
+
+['arch == s390 or arch == s390x', {
+  # These tests fail because s390 float min and max doesn't convert sNaN to qNaN.
+  'tests/f32': [SKIP],
+  'tests/f64': [SKIP],
+}],  # 'arch == s390 or arch == s390x'
+
 ]