mirror of https://github.com/PCSX2/pcsx2.git
420 lines
7.1 KiB
C++
420 lines
7.1 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* ix86 core v0.6.2
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* Authors: linuzappz <linuzappz@pcsx.net>
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* alexey silinov
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* goldfinger
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* zerofrog(@gmail.com)
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* cottonvibes(@gmail.com)
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*/
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//------------------------------------------------------------------
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// ix86 legacy emitter functions
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//------------------------------------------------------------------
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#include "common/emitter/legacy_internal.h"
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emitterT void ModRM(uint mod, uint reg, uint rm)
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{
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// Note: Following assertions are for legacy support only.
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// The new emitter performs these sanity checks during operand construction, so these
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// assertions can probably be removed once all legacy emitter code has been removed.
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pxAssert(mod < 4);
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pxAssert(reg < 8);
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pxAssert(rm < 8);
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xWrite8((mod << 6) | (reg << 3) | rm);
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}
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emitterT void SibSB(uint ss, uint index, uint base)
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{
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// Note: Following asserts are for legacy support only.
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// The new emitter performs these sanity checks during operand construction, so these
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// assertions can probably be removed once all legacy emitter code has been removed.
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pxAssert(ss < 4);
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pxAssert(index < 8);
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pxAssert(base < 8);
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xWrite8((ss << 6) | (index << 3) | base);
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}
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using namespace x86Emitter;
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//////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////////
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// From here on are instructions that have NOT been implemented in the new emitter.
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//////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////////
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emitterT u8* J8Rel(int cc, int to)
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{
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xWrite8(cc);
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xWrite8(to);
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return (u8*)(x86Ptr - 1);
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}
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emitterT u16* J16Rel(int cc, u32 to)
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{
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xWrite16(0x0F66);
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xWrite8(cc);
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xWrite16(to);
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return (u16*)(x86Ptr - 2);
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}
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emitterT u32* J32Rel(int cc, u32 to)
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{
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xWrite8(0x0F);
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xWrite8(cc);
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xWrite32(to);
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return (u32*)(x86Ptr - 4);
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}
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////////////////////////////////////////////////////
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emitterT void x86SetPtr(u8* ptr)
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{
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x86Ptr = ptr;
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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// Jump Label API (as rough as it might be)
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//
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// I don't auto-inline these because of the console logging in case of error, which tends
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// to cause quite a bit of code bloat.
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//
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void x86SetJ8(u8* j8)
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{
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u32 jump = (x86Ptr - j8) - 1;
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if (jump > 0x7f)
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{
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Console.Error("j8 greater than 0x7f!!");
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assert(0);
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}
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*j8 = (u8)jump;
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}
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void x86SetJ8A(u8* j8)
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{
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u32 jump = (x86Ptr - j8) - 1;
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if (jump > 0x7f)
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{
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Console.Error("j8 greater than 0x7f!!");
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assert(0);
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}
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if (((uptr)x86Ptr & 0xf) > 4)
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{
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uptr newjump = jump + 16 - ((uptr)x86Ptr & 0xf);
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if (newjump <= 0x7f)
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{
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jump = newjump;
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while ((uptr)x86Ptr & 0xf)
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*x86Ptr++ = 0x90;
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}
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}
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*j8 = (u8)jump;
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}
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////////////////////////////////////////////////////
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emitterT void x86SetJ32(u32* j32)
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{
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*j32 = (x86Ptr - (u8*)j32) - 4;
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}
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emitterT void x86SetJ32A(u32* j32)
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{
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while ((uptr)x86Ptr & 0xf)
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*x86Ptr++ = 0x90;
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x86SetJ32(j32);
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}
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////////////////////////////////////////////////////
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emitterT void x86Align(int bytes)
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{
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// forward align
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x86Ptr = (u8*)(((uptr)x86Ptr + bytes - 1) & ~(bytes - 1));
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}
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/********************/
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/* IX86 instructions */
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/********************/
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////////////////////////////////////
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// jump instructions /
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////////////////////////////////////
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/* jmp rel8 */
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emitterT u8* JMP8(u8 to)
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{
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xWrite8(0xEB);
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xWrite8(to);
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return x86Ptr - 1;
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}
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/* jmp rel32 */
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emitterT u32* JMP32(uptr to)
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{
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assert((sptr)to <= 0x7fffffff && (sptr)to >= -0x7fffffff);
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xWrite8(0xE9);
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xWrite32(to);
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return (u32*)(x86Ptr - 4);
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}
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/* jp rel8 */
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emitterT u8* JP8(u8 to)
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{
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return J8Rel(0x7A, to);
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}
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/* jnp rel8 */
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emitterT u8* JNP8(u8 to)
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{
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return J8Rel(0x7B, to);
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}
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/* je rel8 */
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emitterT u8* JE8(u8 to)
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{
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return J8Rel(0x74, to);
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}
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/* jz rel8 */
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emitterT u8* JZ8(u8 to)
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{
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return J8Rel(0x74, to);
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}
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/* js rel8 */
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emitterT u8* JS8(u8 to)
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{
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return J8Rel(0x78, to);
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}
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/* jns rel8 */
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emitterT u8* JNS8(u8 to)
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{
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return J8Rel(0x79, to);
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}
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/* jg rel8 */
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emitterT u8* JG8(u8 to)
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{
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return J8Rel(0x7F, to);
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}
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/* jge rel8 */
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emitterT u8* JGE8(u8 to)
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{
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return J8Rel(0x7D, to);
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}
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/* jl rel8 */
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emitterT u8* JL8(u8 to)
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{
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return J8Rel(0x7C, to);
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}
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/* ja rel8 */
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emitterT u8* JA8(u8 to)
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{
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return J8Rel(0x77, to);
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}
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emitterT u8* JAE8(u8 to)
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{
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return J8Rel(0x73, to);
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}
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/* jb rel8 */
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emitterT u8* JB8(u8 to)
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{
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return J8Rel(0x72, to);
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}
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/* jbe rel8 */
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emitterT u8* JBE8(u8 to)
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{
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return J8Rel(0x76, to);
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}
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/* jle rel8 */
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emitterT u8* JLE8(u8 to)
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{
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return J8Rel(0x7E, to);
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}
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/* jne rel8 */
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emitterT u8* JNE8(u8 to)
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{
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return J8Rel(0x75, to);
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}
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/* jnz rel8 */
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emitterT u8* JNZ8(u8 to)
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{
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return J8Rel(0x75, to);
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}
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/* jng rel8 */
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emitterT u8* JNG8(u8 to)
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{
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return J8Rel(0x7E, to);
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}
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/* jnge rel8 */
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emitterT u8* JNGE8(u8 to)
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{
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return J8Rel(0x7C, to);
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}
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/* jnl rel8 */
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emitterT u8* JNL8(u8 to)
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{
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return J8Rel(0x7D, to);
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}
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/* jnle rel8 */
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emitterT u8* JNLE8(u8 to)
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{
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return J8Rel(0x7F, to);
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}
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/* jo rel8 */
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emitterT u8* JO8(u8 to)
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{
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return J8Rel(0x70, to);
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}
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/* jno rel8 */
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emitterT u8* JNO8(u8 to)
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{
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return J8Rel(0x71, to);
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}
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// jb rel32
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emitterT u32* JB32(u32 to)
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{
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return J32Rel(0x82, to);
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}
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/* je rel32 */
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emitterT u32* JE32(u32 to)
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{
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return J32Rel(0x84, to);
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}
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/* jz rel32 */
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emitterT u32* JZ32(u32 to)
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{
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return J32Rel(0x84, to);
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}
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/* js rel32 */
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emitterT u32* JS32(u32 to)
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{
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return J32Rel(0x88, to);
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}
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/* jns rel32 */
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emitterT u32* JNS32(u32 to)
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{
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return J32Rel(0x89, to);
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}
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/* jg rel32 */
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emitterT u32* JG32(u32 to)
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{
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return J32Rel(0x8F, to);
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}
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/* jge rel32 */
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emitterT u32* JGE32(u32 to)
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{
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return J32Rel(0x8D, to);
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}
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/* jl rel32 */
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emitterT u32* JL32(u32 to)
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{
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return J32Rel(0x8C, to);
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}
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/* jle rel32 */
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emitterT u32* JLE32(u32 to)
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{
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return J32Rel(0x8E, to);
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}
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/* ja rel32 */
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emitterT u32* JA32(u32 to)
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{
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return J32Rel(0x87, to);
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}
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/* jae rel32 */
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emitterT u32* JAE32(u32 to)
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{
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return J32Rel(0x83, to);
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}
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/* jne rel32 */
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emitterT u32* JNE32(u32 to)
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{
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return J32Rel(0x85, to);
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}
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/* jnz rel32 */
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emitterT u32* JNZ32(u32 to)
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{
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return J32Rel(0x85, to);
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}
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/* jng rel32 */
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emitterT u32* JNG32(u32 to)
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{
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return J32Rel(0x8E, to);
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}
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/* jnge rel32 */
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emitterT u32* JNGE32(u32 to)
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{
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return J32Rel(0x8C, to);
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}
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/* jnl rel32 */
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emitterT u32* JNL32(u32 to)
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{
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return J32Rel(0x8D, to);
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}
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/* jnle rel32 */
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emitterT u32* JNLE32(u32 to)
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{
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return J32Rel(0x8F, to);
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}
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/* jo rel32 */
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emitterT u32* JO32(u32 to)
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{
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return J32Rel(0x80, to);
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}
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/* jno rel32 */
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emitterT u32* JNO32(u32 to)
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{
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return J32Rel(0x81, to);
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}
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