pcsx2/common/emitter/legacy.cpp

420 lines
7.1 KiB
C++

/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2010 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/>.
*/
/*
* ix86 core v0.6.2
* Authors: linuzappz <linuzappz@pcsx.net>
* alexey silinov
* goldfinger
* zerofrog(@gmail.com)
* cottonvibes(@gmail.com)
*/
//------------------------------------------------------------------
// ix86 legacy emitter functions
//------------------------------------------------------------------
#include "common/emitter/legacy_internal.h"
emitterT void ModRM(uint mod, uint reg, uint rm)
{
// Note: Following assertions are for legacy support only.
// The new emitter performs these sanity checks during operand construction, so these
// assertions can probably be removed once all legacy emitter code has been removed.
pxAssert(mod < 4);
pxAssert(reg < 8);
pxAssert(rm < 8);
xWrite8((mod << 6) | (reg << 3) | rm);
}
emitterT void SibSB(uint ss, uint index, uint base)
{
// Note: Following asserts are for legacy support only.
// The new emitter performs these sanity checks during operand construction, so these
// assertions can probably be removed once all legacy emitter code has been removed.
pxAssert(ss < 4);
pxAssert(index < 8);
pxAssert(base < 8);
xWrite8((ss << 6) | (index << 3) | base);
}
using namespace x86Emitter;
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
// From here on are instructions that have NOT been implemented in the new emitter.
//////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////
emitterT u8* J8Rel(int cc, int to)
{
xWrite8(cc);
xWrite8(to);
return (u8*)(x86Ptr - 1);
}
emitterT u16* J16Rel(int cc, u32 to)
{
xWrite16(0x0F66);
xWrite8(cc);
xWrite16(to);
return (u16*)(x86Ptr - 2);
}
emitterT u32* J32Rel(int cc, u32 to)
{
xWrite8(0x0F);
xWrite8(cc);
xWrite32(to);
return (u32*)(x86Ptr - 4);
}
////////////////////////////////////////////////////
emitterT void x86SetPtr(u8* ptr)
{
x86Ptr = ptr;
}
//////////////////////////////////////////////////////////////////////////////////////////
// Jump Label API (as rough as it might be)
//
// I don't auto-inline these because of the console logging in case of error, which tends
// to cause quite a bit of code bloat.
//
void x86SetJ8(u8* j8)
{
u32 jump = (x86Ptr - j8) - 1;
if (jump > 0x7f)
{
Console.Error("j8 greater than 0x7f!!");
assert(0);
}
*j8 = (u8)jump;
}
void x86SetJ8A(u8* j8)
{
u32 jump = (x86Ptr - j8) - 1;
if (jump > 0x7f)
{
Console.Error("j8 greater than 0x7f!!");
assert(0);
}
if (((uptr)x86Ptr & 0xf) > 4)
{
uptr newjump = jump + 16 - ((uptr)x86Ptr & 0xf);
if (newjump <= 0x7f)
{
jump = newjump;
while ((uptr)x86Ptr & 0xf)
*x86Ptr++ = 0x90;
}
}
*j8 = (u8)jump;
}
////////////////////////////////////////////////////
emitterT void x86SetJ32(u32* j32)
{
*j32 = (x86Ptr - (u8*)j32) - 4;
}
emitterT void x86SetJ32A(u32* j32)
{
while ((uptr)x86Ptr & 0xf)
*x86Ptr++ = 0x90;
x86SetJ32(j32);
}
////////////////////////////////////////////////////
emitterT void x86Align(int bytes)
{
// forward align
x86Ptr = (u8*)(((uptr)x86Ptr + bytes - 1) & ~(bytes - 1));
}
/********************/
/* IX86 instructions */
/********************/
////////////////////////////////////
// jump instructions /
////////////////////////////////////
/* jmp rel8 */
emitterT u8* JMP8(u8 to)
{
xWrite8(0xEB);
xWrite8(to);
return x86Ptr - 1;
}
/* jmp rel32 */
emitterT u32* JMP32(uptr to)
{
assert((sptr)to <= 0x7fffffff && (sptr)to >= -0x7fffffff);
xWrite8(0xE9);
xWrite32(to);
return (u32*)(x86Ptr - 4);
}
/* jp rel8 */
emitterT u8* JP8(u8 to)
{
return J8Rel(0x7A, to);
}
/* jnp rel8 */
emitterT u8* JNP8(u8 to)
{
return J8Rel(0x7B, to);
}
/* je rel8 */
emitterT u8* JE8(u8 to)
{
return J8Rel(0x74, to);
}
/* jz rel8 */
emitterT u8* JZ8(u8 to)
{
return J8Rel(0x74, to);
}
/* js rel8 */
emitterT u8* JS8(u8 to)
{
return J8Rel(0x78, to);
}
/* jns rel8 */
emitterT u8* JNS8(u8 to)
{
return J8Rel(0x79, to);
}
/* jg rel8 */
emitterT u8* JG8(u8 to)
{
return J8Rel(0x7F, to);
}
/* jge rel8 */
emitterT u8* JGE8(u8 to)
{
return J8Rel(0x7D, to);
}
/* jl rel8 */
emitterT u8* JL8(u8 to)
{
return J8Rel(0x7C, to);
}
/* ja rel8 */
emitterT u8* JA8(u8 to)
{
return J8Rel(0x77, to);
}
emitterT u8* JAE8(u8 to)
{
return J8Rel(0x73, to);
}
/* jb rel8 */
emitterT u8* JB8(u8 to)
{
return J8Rel(0x72, to);
}
/* jbe rel8 */
emitterT u8* JBE8(u8 to)
{
return J8Rel(0x76, to);
}
/* jle rel8 */
emitterT u8* JLE8(u8 to)
{
return J8Rel(0x7E, to);
}
/* jne rel8 */
emitterT u8* JNE8(u8 to)
{
return J8Rel(0x75, to);
}
/* jnz rel8 */
emitterT u8* JNZ8(u8 to)
{
return J8Rel(0x75, to);
}
/* jng rel8 */
emitterT u8* JNG8(u8 to)
{
return J8Rel(0x7E, to);
}
/* jnge rel8 */
emitterT u8* JNGE8(u8 to)
{
return J8Rel(0x7C, to);
}
/* jnl rel8 */
emitterT u8* JNL8(u8 to)
{
return J8Rel(0x7D, to);
}
/* jnle rel8 */
emitterT u8* JNLE8(u8 to)
{
return J8Rel(0x7F, to);
}
/* jo rel8 */
emitterT u8* JO8(u8 to)
{
return J8Rel(0x70, to);
}
/* jno rel8 */
emitterT u8* JNO8(u8 to)
{
return J8Rel(0x71, to);
}
// jb rel32
emitterT u32* JB32(u32 to)
{
return J32Rel(0x82, to);
}
/* je rel32 */
emitterT u32* JE32(u32 to)
{
return J32Rel(0x84, to);
}
/* jz rel32 */
emitterT u32* JZ32(u32 to)
{
return J32Rel(0x84, to);
}
/* js rel32 */
emitterT u32* JS32(u32 to)
{
return J32Rel(0x88, to);
}
/* jns rel32 */
emitterT u32* JNS32(u32 to)
{
return J32Rel(0x89, to);
}
/* jg rel32 */
emitterT u32* JG32(u32 to)
{
return J32Rel(0x8F, to);
}
/* jge rel32 */
emitterT u32* JGE32(u32 to)
{
return J32Rel(0x8D, to);
}
/* jl rel32 */
emitterT u32* JL32(u32 to)
{
return J32Rel(0x8C, to);
}
/* jle rel32 */
emitterT u32* JLE32(u32 to)
{
return J32Rel(0x8E, to);
}
/* ja rel32 */
emitterT u32* JA32(u32 to)
{
return J32Rel(0x87, to);
}
/* jae rel32 */
emitterT u32* JAE32(u32 to)
{
return J32Rel(0x83, to);
}
/* jne rel32 */
emitterT u32* JNE32(u32 to)
{
return J32Rel(0x85, to);
}
/* jnz rel32 */
emitterT u32* JNZ32(u32 to)
{
return J32Rel(0x85, to);
}
/* jng rel32 */
emitterT u32* JNG32(u32 to)
{
return J32Rel(0x8E, to);
}
/* jnge rel32 */
emitterT u32* JNGE32(u32 to)
{
return J32Rel(0x8C, to);
}
/* jnl rel32 */
emitterT u32* JNL32(u32 to)
{
return J32Rel(0x8D, to);
}
/* jnle rel32 */
emitterT u32* JNLE32(u32 to)
{
return J32Rel(0x8F, to);
}
/* jo rel32 */
emitterT u32* JO32(u32 to)
{
return J32Rel(0x80, to);
}
/* jno rel32 */
emitterT u32* JNO32(u32 to)
{
return J32Rel(0x81, to);
}