ppc64: [baseline] fix condition register

Change-Id: Ia6f542104887624d80eebd309f16b7da94159fc4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3679978Reviewed-by: Milad Farazmand <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80861}

src/baseline/ppc/baseline-assembler-ppc-inl.h

@@ -237,7 +237,7 @@ void BaselineAssembler::TestAndBranch(Register value, int mask, Condition cc,
                                       Label* target, Label::Distance) {
   ASM_CODE_COMMENT(masm_);
   __ AndU64(r0, value, Operand(mask), ip, SetRC);
-  __ b(AsMasmCondition(cc), target);
+  __ b(AsMasmCondition(cc), target, cr0);
 }
 
 void BaselineAssembler::JumpIf(Condition cc, Register lhs, const Operand& rhs,

src/baseline/ppc/baseline-compiler-ppc-inl.h

@@ -75,8 +75,8 @@ void BaselineCompiler::PrologueFillFrame() {
     for (int i = 0; i < kLoopUnrollSize; ++i) {
       __ Push(kInterpreterAccumulatorRegister);
     }
-    __ masm()->SubS64(scratch, scratch, Operand(1));
-    __ masm()->b(gt, &loop);
+    __ masm()->SubS64(scratch, scratch, Operand(1), r0, LeaveOE, SetRC);
+    __ masm()->bgt(&loop, cr0);
   }
 }