/*  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

namespace x86Emitter {

// --------------------------------------------------------------------------------------
//  xImplSimd_Shuffle
// --------------------------------------------------------------------------------------
struct xImplSimd_Shuffle
{
	inline void _selector_assertion_check( u8 selector ) const;

	void PS( const xRegisterSSE& to, const xRegisterSSE& from, u8 selector ) const;
	void PS( const xRegisterSSE& to, const ModSibBase& from, u8 selector ) const;

	void PD( const xRegisterSSE& to, const xRegisterSSE& from, u8 selector ) const;
	void PD( const xRegisterSSE& to, const ModSibBase& from, u8 selector ) const;
};

// --------------------------------------------------------------------------------------
//  xImplSimd_PShuffle
// --------------------------------------------------------------------------------------
struct xImplSimd_PShuffle
{
	// Copies words from src and inserts them into dest at word locations selected with
	// the order operand (8 bit immediate).
	const xImplSimd_DestRegImmMMX	W;

	// Copies doublewords from src and inserts them into dest at dword locations selected
	// with the order operand (8 bit immediate).
	const xImplSimd_DestRegImmSSE	D;
	
	// Copies words from the low quadword of src and inserts them into the low quadword
	// of dest at word locations selected with the order operand (8 bit immediate).
	// The high quadword of src is copied to the high quadword of dest.
	const xImplSimd_DestRegImmSSE	LW;

	// Copies words from the high quadword of src and inserts them into the high quadword
	// of dest at word locations selected with the order operand (8 bit immediate).
	// The low quadword of src is copied to the low quadword of dest.
	const xImplSimd_DestRegImmSSE	HW;

	// [sSSE-3] Performs in-place shuffles of bytes in dest according to the shuffle
	// control mask in src.  If the most significant bit (bit[7]) of each byte of the
	// shuffle control mask is set, then constant zero is written in the result byte.
	// Each byte in the shuffle control mask forms an index to permute the corresponding
	// byte in dest. The value of each index is the least significant 4 bits (128-bit
	// operation) or 3 bits (64-bit operation) of the shuffle control byte.
	//
	// Operands can be MMX or XMM registers.
	const xImplSimd_DestRegEither	B;
};

// --------------------------------------------------------------------------------------
//  SimdImpl_PUnpack
// --------------------------------------------------------------------------------------
struct SimdImpl_PUnpack
{
	// Unpack and interleave low-order bytes from src and dest into dest.
	const xImplSimd_DestRegEither	LBW;
	// Unpack and interleave low-order words from src and dest into dest.
	const xImplSimd_DestRegEither	LWD;
	// Unpack and interleave low-order doublewords from src and dest into dest.
	const xImplSimd_DestRegEither	LDQ;
	// Unpack and interleave low-order quadwords from src and dest into dest.
	const xImplSimd_DestRegSSE		LQDQ;

	// Unpack and interleave high-order bytes from src and dest into dest.
	const xImplSimd_DestRegEither	HBW;
	// Unpack and interleave high-order words from src and dest into dest.
	const xImplSimd_DestRegEither	HWD;
	// Unpack and interleave high-order doublewords from src and dest into dest.
	const xImplSimd_DestRegEither	HDQ;
	// Unpack and interleave high-order quadwords from src and dest into dest.
	const xImplSimd_DestRegSSE		HQDQ;
};

// --------------------------------------------------------------------------------------
//  SimdImpl_Pack
// --------------------------------------------------------------------------------------
// Pack with Signed or Unsigned Saturation
//
struct SimdImpl_Pack
{
	// Converts packed signed word integers from src and dest into packed signed 
	// byte integers in dest, using signed saturation.
	const xImplSimd_DestRegEither	SSWB;

	// Converts packed signed dword integers from src and dest into packed signed 
	// word integers in dest, using signed saturation.
	const xImplSimd_DestRegEither	SSDW;

	// Converts packed unsigned word integers from src and dest into packed unsigned 
	// byte integers in dest, using unsigned saturation.
	const xImplSimd_DestRegEither	USWB;

	// [SSE-4.1] Converts packed unsigned dword integers from src and dest into packed
	// unsigned word integers in dest, using signed saturation.
	const xImplSimd_DestRegSSE		USDW;
};

// --------------------------------------------------------------------------------------
//  SimdImpl_Unpack
// --------------------------------------------------------------------------------------
struct xImplSimd_Unpack
{
	// Unpacks the high doubleword [single-precision] values from src and dest into
	// dest, such that the result of dest looks like this:
	//    dest[0] <- dest[2]
	//    dest[1] <- src[2]
	//    dest[2] <- dest[3]
	//    dest[3] <- src[3]
	//
	const xImplSimd_DestRegSSE		HPS;

	// Unpacks the high quadword [double-precision] values from src and dest into
	// dest, such that the result of dest looks like this:
	//    dest.lo <- dest.hi
	//    dest.hi <- src.hi
	//
	const xImplSimd_DestRegSSE		HPD;

	// Unpacks the low doubleword [single-precision] values from src and dest into
	// dest, such that the result of dest looks like this:
	//    dest[3] <- src[1]
	//    dest[2] <- dest[1]
	//    dest[1] <- src[0]
	//    dest[0] <- dest[0]
	//
	const xImplSimd_DestRegSSE		LPS;

	// Unpacks the low quadword [double-precision] values from src and dest into
	// dest, effectively moving the low portion of src into the upper portion of dest.
	// The result of dest is loaded as such:
	//    dest.hi <- src.lo
	//    dest.lo <- dest.lo  [remains unchanged!]
	//
	const xImplSimd_DestRegSSE		LPD;
};


struct xImplSimd_InsertExtractHelper
{
	u16		Opcode;

	// [SSE-4.1] Allowed with SSE registers only (MMX regs are invalid)
	void operator()( const xRegisterSSE& to, const xRegister32& from, u8 imm8 ) const;

	// [SSE-4.1] Allowed with SSE registers only (MMX regs are invalid)
	void operator()( const xRegisterSSE& to, const ModSibBase& from, u8 imm8 ) const;
};

// --------------------------------------------------------------------------------------
//  SimdImpl_PInsert
// --------------------------------------------------------------------------------------
// PINSRW/B/D [all but Word form are SSE4.1 only!]
//
struct xImplSimd_PInsert
{
	void W( const xRegisterSSE& to, const xRegister32& from, u8 imm8 ) const;
	void W( const xRegisterSSE& to, const ModSibBase& from, u8 imm8 ) const;

	void W( const xRegisterMMX& to, const xRegister32& from, u8 imm8 ) const;
	void W( const xRegisterMMX& to, const ModSibBase& from, u8 imm8 ) const;

	// [SSE-4.1] Allowed with SSE registers only (MMX regs are invalid)
	xImplSimd_InsertExtractHelper	B;

	// [SSE-4.1] Allowed with SSE registers only (MMX regs are invalid)
	xImplSimd_InsertExtractHelper	D;
};


//////////////////////////////////////////////////////////////////////////////////////////
// PEXTRW/B/D [all but Word form are SSE4.1 only!]
//
// Note: Word form's indirect memory form is only available in SSE4.1.
//
struct SimdImpl_PExtract
{
	// Copies the word element specified by imm8 from src to dest.  The upper bits
	// of dest are zero-extended (cleared).  This can be used to extract any single packed
	// word value from src into an x86 32 bit register.
	//
	// [SSE-4.1] Note: Indirect memory forms of this instruction are an SSE-4.1 extension!
	//
	void W( const xRegister32& to, const xRegisterSSE& from, u8 imm8 ) const;
	void W( const xRegister32& to, const xRegisterMMX& from, u8 imm8 ) const;
	void W( const ModSibBase& dest, const xRegisterSSE& from, u8 imm8 ) const;

	// [SSE-4.1] Copies the byte element specified by imm8 from src to dest.  The upper bits
	// of dest are zero-extended (cleared).  This can be used to extract any single packed
	// byte value from src into an x86 32 bit register.
	const xImplSimd_InsertExtractHelper	B;

	// [SSE-4.1] Copies the dword element specified by imm8 from src to dest.  This can be
	// used to extract any single packed dword value from src into an x86 32 bit register.
	const xImplSimd_InsertExtractHelper	D;
};

}