www.pudn.com > potemkin_sourceforPSP.rar > ARMBranch.cpp

#include "stdafx.h" 
#include "../../Globals.h" 
#include "../MemMap.h" 
 
#include "ARM.h" 
#include "../IR/IR.h" 
 
bool internalBackBranches = false; 
 
namespace ARMInstructions 
{ 
 
	////////////////////////////////////////////////////////////////////////// 
	/// ARM 
	////////////////////////////////////////////////////////////////////////// 
 
	//Software i 
	void Comp_SWI(u32 op) 
	{ 
		IR_StartBranch(op>>28); 
		IR_Add(IR_LEAVE,0,0,IRImm(compiler_pc + 4),IRL_SWI,IRImm(op&0xFFFFFF)); 
		if (!IR_IsInBranch()) 
			Compiler_ExitCompile(); 
		IR_EndBranch(); 
	}   
 
 
 
	//Branch and 
	void Comp_B(u32 op) 
	{ 
		IR_StartBranch(op>>28); 
		u32 addr = compiler_pc+8+4*SEX24(op&0xFFFFFF); 
		if (addr == Compiler_GetStart()) 
		{ 
			IR_Add(IR_LEAVE,0,0,IRImm(addr),IRL_BRARMSAMEBLOCK); 
			if (!IR_IsInBranch()) 
				Compiler_ExitCompile(); 
		} 
		else if (internalBackBranches && addr>=Compiler_GetStart() && addr> 28) == 0xf) ? IRL_BRTHUMB : IRL_BRARM); 
			if (!IR_IsInBranch()) 
				Compiler_ExitCompile(); 
		} 
		IR_EndBranch(); 
	}     
 
	void Comp_BL(u32 op) 
	{ 
		IR_StartBranch(op>>28); 
		u32 addr = compiler_pc+8+4*SEX24(op&0xFFFFFF); 
		IR_Add(IR_MOV,0,ARM_REG_LR,IRImm(compiler_pc+(compiler_thumb?2:4))); 
		IR_Add(IR_LEAVE,0,0,IRImm(addr),((op >> 28) == 0xf) ? IRL_BRTHUMB : IRL_BRARM); 
		if (!IR_IsInBranch()) 
			Compiler_ExitCompile(); 
		IR_EndBranch(); 
	} 
 
	void Comp_BXr(u32 op) 
	{ 
		IR_StartBranch(op>>28); 
		int rm = op&0xf; 
		IR_Add(IR_LEAVE,0,0,rm,IRL_BRDEPENDS); 
		if (!IR_IsInBranch()) 
			Compiler_ExitCompile(); 
		IR_EndBranch(); 
	} 
 
	void Comp_BLXr(u32 op) 
	{ 
		IR_StartBranch(op>>28); 
		int rm = op&0xf; 
		IR_Add(IR_MOV,0,ARM_REG_LR,IRImm(compiler_pc+(compiler_thumb?2:4))); 
		IR_Add(IR_LEAVE,0,0,rm,IRL_BRDEPENDS); 
		if (!IR_IsInBranch()) 
			Compiler_ExitCompile(); 
		IR_EndBranch(); 
	} 
}