From 4783133bbd651590b5116be95a5deda31fe9f4dc Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Tue, 23 Dec 2014 22:45:52 -0500
Subject: ARM: Add a mechanism for faking CPU time elapsed during HLE.

- Also a few cleanups.
---
 src/core/arm/interpreter/arm_interpreter.cpp | 51 +++-------------------------
 src/core/arm/interpreter/arm_interpreter.h   |  6 ++++
 2 files changed, 11 insertions(+), 46 deletions(-)

(limited to 'src/core/arm/interpreter')

diff --git a/src/core/arm/interpreter/arm_interpreter.cpp b/src/core/arm/interpreter/arm_interpreter.cpp
index be04fc1a..80ebc359 100644
--- a/src/core/arm/interpreter/arm_interpreter.cpp
+++ b/src/core/arm/interpreter/arm_interpreter.cpp
@@ -38,78 +38,43 @@ ARM_Interpreter::~ARM_Interpreter() {
     delete state;
 }
 
-/**
- * Set the Program Counter to an address
- * @param addr Address to set PC to
- */
 void ARM_Interpreter::SetPC(u32 pc) {
     state->pc = state->Reg[15] = pc;
 }
 
-/*
- * Get the current Program Counter
- * @return Returns current PC
- */
 u32 ARM_Interpreter::GetPC() const {
     return state->pc;
 }
 
-/**
- * Get an ARM register
- * @param index Register index (0-15)
- * @return Returns the value in the register
- */
 u32 ARM_Interpreter::GetReg(int index) const {
     return state->Reg[index];
 }
 
-/**
- * Set an ARM register
- * @param index Register index (0-15)
- * @param value Value to set register to
- */
 void ARM_Interpreter::SetReg(int index, u32 value) {
     state->Reg[index] = value;
 }
 
-/**
- * Get the current CPSR register
- * @return Returns the value of the CPSR register
- */
 u32 ARM_Interpreter::GetCPSR() const {
     return state->Cpsr;
 }
 
-/**
- * Set the current CPSR register
- * @param cpsr Value to set CPSR to
- */
 void ARM_Interpreter::SetCPSR(u32 cpsr) {
     state->Cpsr = cpsr;
 }
 
-/**
- * Returns the number of clock ticks since the last reset
- * @return Returns number of clock ticks
- */
 u64 ARM_Interpreter::GetTicks() const {
-    return ARMul_Time(state);
+    return state->NumInstrs;
+}
+
+void ARM_Interpreter::AddTicks(u64 ticks) {
+    state->NumInstrs += ticks;
 }
 
-/**
- * Executes the given number of instructions
- * @param num_instructions Number of instructions to executes
- */
 void ARM_Interpreter::ExecuteInstructions(int num_instructions) {
     state->NumInstrsToExecute = num_instructions - 1;
     ARMul_Emulate32(state);
 }
 
-/**
- * Saves the current CPU context
- * @param ctx Thread context to save
- * @todo Do we need to save Reg[15] and NextInstr?
- */
 void ARM_Interpreter::SaveContext(ThreadContext& ctx) {
     memcpy(ctx.cpu_registers, state->Reg, sizeof(ctx.cpu_registers));
     memcpy(ctx.fpu_registers, state->ExtReg, sizeof(ctx.fpu_registers));
@@ -126,11 +91,6 @@ void ARM_Interpreter::SaveContext(ThreadContext& ctx) {
     ctx.mode = state->NextInstr;
 }
 
-/**
- * Loads a CPU context
- * @param ctx Thread context to load
- * @param Do we need to load Reg[15] and NextInstr?
- */
 void ARM_Interpreter::LoadContext(const ThreadContext& ctx) {
     memcpy(state->Reg, ctx.cpu_registers, sizeof(ctx.cpu_registers));
     memcpy(state->ExtReg, ctx.fpu_registers, sizeof(ctx.fpu_registers));
@@ -147,7 +107,6 @@ void ARM_Interpreter::LoadContext(const ThreadContext& ctx) {
     state->NextInstr = ctx.mode;
 }
 
-/// Prepare core for thread reschedule (if needed to correctly handle state)
 void ARM_Interpreter::PrepareReschedule() {
     state->NumInstrsToExecute = 0;
 }
diff --git a/src/core/arm/interpreter/arm_interpreter.h b/src/core/arm/interpreter/arm_interpreter.h
index b685215a..019dad5d 100644
--- a/src/core/arm/interpreter/arm_interpreter.h
+++ b/src/core/arm/interpreter/arm_interpreter.h
@@ -60,6 +60,12 @@ public:
      */
     u64 GetTicks() const override;
 
+    /**
+    * Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
+    * @param ticks Number of ticks to advance the CPU core
+    */
+    void AddTicks(u64 ticks) override;
+
     /**
      * Saves the current CPU context
      * @param ctx Thread context to save
-- 
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