ppc64: [baseline] implement baseline descriptor

Change-Id: I57eac5fdeddd49ecf8b45e293fbe9f98f068b86b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3597310Reviewed-by: Milad Farazmand <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80059}

src/codegen/ppc/interface-descriptors-ppc-inl.h

@@ -114,14 +114,10 @@ constexpr Register GrowArrayElementsDescriptor::KeyRegister() { return r6; }
 
 // static
 constexpr Register BaselineLeaveFrameDescriptor::ParamsSizeRegister() {
-  // TODO(v8:11421): Implement on this platform.
   return r6;
 }
 // static
-constexpr Register BaselineLeaveFrameDescriptor::WeightRegister() {
-  // TODO(v8:11421): Implement on this platform.
-  return r7;
-}
+constexpr Register BaselineLeaveFrameDescriptor::WeightRegister() { return r7; }
 
 // static
 // static
@@ -244,8 +240,7 @@ constexpr auto CompareDescriptor::registers() { return RegisterArray(r4, r3); }
 
 // static
 constexpr auto Compare_BaselineDescriptor::registers() {
-  // TODO(v8:11421): Implement on this platform.
-  return DefaultRegisterArray();
+  return RegisterArray(r4, r3, r5);
 }
 
 // static
@@ -253,14 +248,12 @@ constexpr auto BinaryOpDescriptor::registers() { return RegisterArray(r4, r3); }
 
 // static
 constexpr auto BinaryOp_BaselineDescriptor::registers() {
-  // TODO(v8:11421): Implement on this platform.
-  return DefaultRegisterArray();
+  return RegisterArray(r4, r3, r5);
 }
 
 // static
 constexpr auto BinarySmiOp_BaselineDescriptor::registers() {
-  // TODO(v8:11421): Implement on this platform.
-  return DefaultRegisterArray();
+  return RegisterArray(r3, r4, r5);
 }
 
 // static