ppc: rename LoadByte to LoadU8

Change-Id: Id1a468a51c0f37c99bb36b388aaa803ae6ed8516
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2905193Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74670}

src/builtins/ppc/builtins-ppc.cc

@@ -363,7 +363,7 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
   ExternalReference debug_hook =
       ExternalReference::debug_hook_on_function_call_address(masm->isolate());
   __ Move(scratch, debug_hook);
-  __ LoadByte(scratch, MemOperand(scratch), r0);
+  __ LoadU8(scratch, MemOperand(scratch), r0);
   __ extsb(scratch, scratch);
   __ CmpSmiLiteral(scratch, Smi::zero(), r0);
   __ bne(&prepare_step_in_if_stepping);
@@ -2436,7 +2436,7 @@ void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) {
     // Check the comments under crrev.com/c/2645694 for more details.
     Label push_empty_simd, simd_pushed;
     __ Move(ip, ExternalReference::supports_wasm_simd_128_address());
-    __ LoadByte(ip, MemOperand(ip), r0);
+    __ LoadU8(ip, MemOperand(ip), r0);
     __ cmpi(ip, Operand::Zero());  // If > 0 then simd is available.
     __ ble(&push_empty_simd);
     __ MultiPushV128(simd_regs);
@@ -2464,7 +2464,7 @@ void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) {
     // Restore registers.
     Label pop_empty_simd, simd_popped;
     __ Move(ip, ExternalReference::supports_wasm_simd_128_address());
-    __ LoadByte(ip, MemOperand(ip), r0);
+    __ LoadU8(ip, MemOperand(ip), r0);
     __ cmpi(ip, Operand::Zero());  // If > 0 then simd is available.
     __ ble(&pop_empty_simd);
     __ MultiPopV128(simd_regs);

src/codegen/ppc/macro-assembler-ppc.cc

@@ -1466,7 +1466,7 @@ void MacroAssembler::CheckDebugHook(Register fun, Register new_target,
   ExternalReference debug_hook_active =
       ExternalReference::debug_hook_on_function_call_address(isolate());
   Move(r7, debug_hook_active);
-  LoadByte(r7, MemOperand(r7), r0);
+  LoadU8(r7, MemOperand(r7), r0);
   extsb(r7, r7);
   CmpSmiLiteral(r7, Smi::zero(), r0);
   beq(&skip_hook);
@@ -2865,13 +2865,13 @@ void MacroAssembler::StoreHalfWord(Register src, const MemOperand& mem,
 
 // Variable length depending on whether offset fits into immediate field
 // MemOperand currently only supports d-form
-void MacroAssembler::LoadByte(Register dst, const MemOperand& mem,
-                              Register scratch) {
+void MacroAssembler::LoadU8(Register dst, const MemOperand& mem,
+                            Register scratch) {
   Register base = mem.ra();
   int offset = mem.offset();
 
   if (!is_int16(offset)) {
-    LoadIntLiteral(scratch, offset);
+    mov(scratch, Operand(offset));
     lbzx(dst, MemOperand(base, scratch));
   } else {
     lbz(dst, mem);

src/codegen/ppc/macro-assembler-ppc.h

@@ -792,7 +792,7 @@ class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler {
   void LoadS16(Register dst, const MemOperand& mem, Register scratch = no_reg);
   void StoreHalfWord(Register src, const MemOperand& mem, Register scratch);
 
-  void LoadByte(Register dst, const MemOperand& mem, Register scratch);
+  void LoadU8(Register dst, const MemOperand& mem, Register scratch);
   void StoreByte(Register src, const MemOperand& mem, Register scratch);
 
   void LoadDoubleU(DoubleRegister dst, const MemOperand& mem,