ppc: [liftoff] implement emit_i32_eqz and emit_i32_set_cond

Change-Id: Ib492a0165d8aed748d8ece406bc51931ee577391
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2849179Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74229}

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

@@ -620,13 +620,28 @@ void LiftoffAssembler::emit_i32_cond_jumpi(LiftoffCondition liftoff_cond,
 }
 
 void LiftoffAssembler::emit_i32_eqz(Register dst, Register src) {
-  bailout(kUnsupportedArchitecture, "emit_i32_eqz");
+  Label done;
+  cmpwi(src, Operand(0));
+  mov(dst, Operand(1));
+  beq(&done);
+  mov(dst, Operand::Zero());
+  bind(&done);
 }
 
 void LiftoffAssembler::emit_i32_set_cond(LiftoffCondition liftoff_cond,
                                          Register dst, Register lhs,
                                          Register rhs) {
-  bailout(kUnsupportedArchitecture, "emit_i32_set_cond");
+  bool use_signed = liftoff::UseSignedOp(liftoff_cond);
+  if (use_signed) {
+    cmpw(lhs, rhs);
+  } else {
+    cmplw(lhs, rhs);
+  }
+  Label done;
+  mov(dst, Operand(1));
+  b(liftoff::ToCondition(liftoff_cond), &done);
+  mov(dst, Operand::Zero());
+  bind(&done);
 }
 
 void LiftoffAssembler::emit_i64_eqz(Register dst, LiftoffRegister src) {