PPC/s390: skip wasm atomic test cases

Atomic operation instructions are not implemented in s390/ppc
yet. Disabling the testcases for now.

R=machenbach@chromium.org, jkummerow@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com
BUG=
LOG=N

Change-Id: If12ad7886bd517a281efa8c9a3ddfaf3479de68b
Reviewed-on: https://chromium-review.googlesource.com/608488Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#47254}

test/cctest/cctest.status

@@ -330,6 +330,14 @@
 
 }],  # 'arch == ppc64 and simulator_run'
 
+##############################################################################
+['arch == ppc or arch == ppc64 or arch == s390 or arch == s390x', {
+
+  # TODO(ppc/s390): implement atomic operations
+  'test-run-wasm-atomics/*': [SKIP],
+
+}],  # 'arch == ppc or arch == ppc64 or arch == s390 or arch == s390x'
+
 ##############################################################################
 ['variant == wasm_traps', {
   'test-accessors/*': [SKIP],

test/mjsunit/mjsunit.status

@@ -440,7 +440,7 @@
 }],  # 'arch == mipsel or arch == mips or arch == mips64el or arch == mips64'
 
 ##############################################################################
-['arch == mipsel or arch == mips or arch == mips64el or arch == mips64', {
+['arch == mipsel or arch == mips or arch == mips64el or arch == mips64 or arch == ppc or arch == ppc64', {
   # These tests fail because qNaN and sNaN values are encoded differently on
   # MIPS and ARM/x86 architectures
   'wasm/float-constant-folding': [SKIP],
@@ -582,6 +582,7 @@
 
   # take too long with the simulator.
   'regress/regress-1132': [SKIP],
+  'regress/regress-740784': [PASS, SLOW],
 }],  # 'arch == ppc and simulator_run'
 
 ##############################################################################
@@ -592,6 +593,13 @@
   'regress/regress-353551': [SKIP],
 }],  # 'arch == ppc64'
 
+##############################################################################
+['arch == ppc64 or arch == ppc or arch == s390 or arch == s390x', {
+
+  # TODO(ppc/s390): implement atomic operations
+  'wasm/atomics': [SKIP],
+}],  # 'arch == ppc64 or arch == ppc or arch == s390 or arch == s390x'
+
 ##############################################################################
 ['variant == stress', {
   'es6/array-iterator-turbo': [SKIP],