pcsx2/common/include/x86emitter/tools.h

/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2009  PCSX2 Dev Team
 * 
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "x86emitter.h"

// this is all that needs to be called and will fill up the below structs
extern void cpudetectInit();

// --------------------------------------------------------------------------------------
//  x86CPU_INFO
// --------------------------------------------------------------------------------------
struct x86CPU_INFO
{
	u32 FamilyID;		// Processor Family
	u32 Model;			// Processor Model
	u32 TypeID;			// Processor Type
	u32 StepID;			// Stepping ID
	u32 Flags;			// Feature Flags
	u32 Flags2;			// More Feature Flags
	u32 EFlags;			// Extended Feature Flags
	u32 EFlags2;		// Extended Feature Flags pg2

	u32 PhysicalCores;
	u32 LogicalCores;

	char VendorName[16];	   // Vendor/Creator ID
	char TypeName[20];      // cpu type
	char FamilyName[50];    // the original cpu name

	// Speed - speed of cpu in mhz
	// This is a rough "real" measure of the cpu speed, taken at application startup.
	// Not to be considered totally accurate: Power saving CPUs and SpeedStep can skew
	// results considerably.
	u32 Speed;

	// ----------------------------------------------------------------------------
	//   x86 CPU Capabilities Section (all boolean flags!)
	// ----------------------------------------------------------------------------

   u32 hasFloatingPointUnit:1;
   u32 hasVirtual8086ModeEnhancements:1;
   u32 hasDebuggingExtensions:1;
   u32 hasPageSizeExtensions:1;
   u32 hasTimeStampCounter:1;
   u32 hasModelSpecificRegisters:1;
   u32 hasPhysicalAddressExtension:1;
   u32 hasCOMPXCHG8BInstruction:1;
   u32 hasAdvancedProgrammableInterruptController:1;
   u32 hasSEPFastSystemCall:1;
   u32 hasMemoryTypeRangeRegisters:1;
   u32 hasPTEGlobalFlag:1;
   u32 hasMachineCheckArchitecture:1;
   u32 hasConditionalMoveAndCompareInstructions:1;
   u32 hasFGPageAttributeTable:1;
   u32 has36bitPageSizeExtension:1;
   u32 hasProcessorSerialNumber:1;
   u32 hasCFLUSHInstruction:1;
   u32 hasDebugStore:1;
   u32 hasACPIThermalMonitorAndClockControl:1;
   u32 hasMultimediaExtensions:1;
   u32 hasFastStreamingSIMDExtensionsSaveRestore:1;
   u32 hasStreamingSIMDExtensions:1;
   u32 hasStreamingSIMD2Extensions:1;
   u32 hasSelfSnoop:1;
   u32 hasMultiThreading:1;			// is TRUE for both multi-core and Hyperthreaded CPUs.
   u32 hasThermalMonitor:1;
   u32 hasIntel64BitArchitecture:1;
   u32 hasStreamingSIMD3Extensions:1;
   u32 hasSupplementalStreamingSIMD3Extensions:1;
   u32 hasStreamingSIMD4Extensions:1;
   u32 hasStreamingSIMD4Extensions2:1;

   // AMD-specific CPU Features
   u32 hasMultimediaExtensionsExt:1;
   u32 hasAMD64BitArchitecture:1;
   u32 has3DNOWInstructionExtensionsExt:1;
   u32 has3DNOWInstructionExtensions:1;
   u32 hasStreamingSIMD4ExtensionsA:1;
};

enum SSE_RoundMode
{
	SSEround_Nearest = 0,
	SSEround_NegInf,
	SSEround_PosInf,
	SSEround_Chop,
};

// --------------------------------------------------------------------------------------
//  SSE_MXCSR  -  Control/Status Register (bitfield)
// --------------------------------------------------------------------------------------
// Bits 0-5 are exception flags; used only if SSE exceptions have been enabled.
//   Bits in this field are "sticky" and, once an exception has occured, must be manually
//   cleared using LDMXCSR or FXRSTOR.
//
// Bits 7-12 are the masks for disabling the exceptions in bits 0-5.  Cleared bits allow
//   exceptions, set bits mask exceptions from being raised.
//
union SSE_MXCSR
{
	u32		bitmask;
	struct 
	{
		u32
			InvalidOpFlag		:1,
			DenormalFlag		:1,
			DivideByZeroFlag	:1,
			OverflowFlag		:1,
			UnderflowFlag		:1,
			PrecisionFlag		:1,

			// This bit is supported only on SSE2 or better CPUs.  Setting it to 1 on
			// SSE1 cpus will result in an invalid instruction exception when executing
			// LDMXSCR.
			DenormalsAreZero	:1,

			InvalidOpMask		:1,
			DenormalMask		:1,
			DivideByZeroMask	:1,
			OverflowMask		:1,
			UnderflowMask		:1,
			PrecisionMask		:1,

			RoundingControl		:2,
			FlushToZero			:1;
	};
	
	SSE_RoundMode GetRoundMode() const;
	SSE_MXCSR& SetRoundMode( SSE_RoundMode mode );
	SSE_MXCSR& ClearExceptionFlags();
	SSE_MXCSR& EnableExceptions();
	SSE_MXCSR& DisableExceptions();
	
	SSE_MXCSR& ApplyReserveMask();

	bool operator ==( const SSE_MXCSR& right ) const
	{
		return bitmask == right.bitmask;
	}
	
	bool operator !=( const SSE_MXCSR& right ) const
	{
		return bitmask != right.bitmask;
	}
	
	operator x86Emitter::ModSib32() const;
};

extern SSE_MXCSR	MXCSR_Mask;

//////////////////////////////////////////////////////////////////////////////////////////


extern __aligned16 x86CPU_INFO x86caps;

extern bool g_EEFreezeRegs;

// when using mmx/xmm regs, use these functions.

namespace MMXRegisters
{
    extern void Freeze();
    extern void Thaw();
    extern bool Saved();
    extern __aligned16 u64 data[8];
};

namespace XMMRegisters
{
    extern void Freeze();
    extern void Thaw();
    extern bool Saved();
    extern __aligned16 u64 data[2*iREGCNT_XMM];
};

namespace Registers
{
    extern void Freeze();
    extern void Thaw();
    extern bool Saved();
};