ppc: [liftoff] implement Registers push and pop

Change-Id: I1fec4575a84d22488fb6d572b302810655c78240
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3097811Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#76324}

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

@@ -2355,11 +2355,13 @@ void LiftoffAssembler::AssertUnreachable(AbortReason reason) {
 }
 
 void LiftoffAssembler::PushRegisters(LiftoffRegList regs) {
-  bailout(kUnsupportedArchitecture, "PushRegisters");
+  MultiPush(regs.GetGpList());
+  MultiPushDoubles(regs.GetFpList());
 }
 
 void LiftoffAssembler::PopRegisters(LiftoffRegList regs) {
-  bailout(kUnsupportedArchitecture, "PopRegisters");
+  MultiPopDoubles(regs.GetFpList());
+  MultiPop(regs.GetGpList());
 }
 
 void LiftoffAssembler::RecordSpillsInSafepoint(Safepoint& safepoint,