PPC/s390: [wasm] Implement atomic load and store in Liftoff on x64

Port 83b115c3

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I46030004c893430abf693b67f8f7b0bb56c49e7a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2001145Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#65770}

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -127,6 +127,18 @@ void LiftoffAssembler::Store(Register dst_addr, Register offset_reg,
   bailout(kUnsupportedArchitecture, "Store");
 }
 
+void LiftoffAssembler::AtomicLoad(LiftoffRegister dst, Register src_addr,
+                                  Register offset_reg, uint32_t offset_imm,
+                                  LoadType type, LiftoffRegList pinned) {
+  bailout(kAtomics, "AtomicLoad");
+}
+
+void LiftoffAssembler::AtomicStore(Register dst_addr, Register offset_reg,
+                                   uint32_t offset_imm, LiftoffRegister src,
+                                   StoreType type, LiftoffRegList pinned) {
+  bailout(kAtomics, "AtomicStore");
+}
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {