Merge pull request #647 from lioncash/disasm

Common: Introduce the new Gekko disassembler to Common.

6 files changed, 2458 insertions, 2 deletions

diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index d5974ecca6..246b5da0e7 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -3,6 +3,7 @@ set(SRCS BreakPoints.cpp
          ColorUtil.cpp
          FileSearch.cpp
          FileUtil.cpp
+         GekkoDisassembler.cpp
          Hash.cpp
          IniFile.cpp
          MathUtil.cpp
diff --git a/Source/Core/Common/Common.vcxproj b/Source/Core/Common/Common.vcxproj
index 31d7bcaffd..106d925365 100644
--- a/Source/Core/Common/Common.vcxproj
+++ b/Source/Core/Common/Common.vcxproj
@@ -56,6 +56,7 @@
     <ClInclude Include="FileUtil.h" />
     <ClInclude Include="FixedSizeQueue.h" />
     <ClInclude Include="FPURoundMode.h" />
+    <ClInclude Include="GekkoDisassembler.h" />
     <ClInclude Include="Hash.h" />
     <ClInclude Include="IniFile.h" />
     <ClInclude Include="LinearDiskCache.h" />
@@ -94,6 +95,7 @@
     <ClCompile Include="ExtendedTrace.cpp" />
     <ClCompile Include="FileSearch.cpp" />
     <ClCompile Include="FileUtil.cpp" />
+    <ClCompile Include="GekkoDisassembler.cpp" />
     <ClCompile Include="Hash.cpp" />
     <ClCompile Include="IniFile.cpp" />
     <ClCompile Include="MathUtil.cpp" />
@@ -140,4 +142,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/Source/Core/Common/Common.vcxproj.filters b/Source/Core/Common/Common.vcxproj.filters
index 1afbcaa15f..3bb9f14958 100644
--- a/Source/Core/Common/Common.vcxproj.filters
+++ b/Source/Core/Common/Common.vcxproj.filters
@@ -70,6 +70,7 @@
     <ClInclude Include="Crypto\bn.h">
       <Filter>Crypto</Filter>
     </ClInclude>
+    <ClInclude Include="GekkoDisassembler.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="BreakPoints.cpp" />
@@ -115,6 +116,7 @@
     </ClCompile>
     <ClCompile Include="stdafx.cpp" />
     <ClCompile Include="XSaveWorkaround.cpp" />
+    <ClCompile Include="GekkoDisassembler.cpp" />
   </ItemGroup>
   <ItemGroup>
     <Text Include="CMakeLists.txt" />
diff --git a/Source/Core/Common/DebugInterface.h b/Source/Core/Common/DebugInterface.h
index 26e0a3e2ee..96b4eec275 100644
--- a/Source/Core/Common/DebugInterface.h
+++ b/Source/Core/Common/DebugInterface.h
@@ -9,7 +9,7 @@ protected:
 	virtual ~DebugInterface() {}
 
 public:
-	virtual void Disassemble(unsigned int /*address*/, char *dest, int /*max_size*/) {strcpy(dest, "NODEBUGGER");}
+	virtual std::string Disassemble(unsigned int /*address*/) { return "NODEBUGGER"; }
 	virtual void GetRawMemoryString(int /*memory*/, unsigned int /*address*/, char *dest, int /*max_size*/) {strcpy(dest, "NODEBUGGER");}
 	virtual int GetInstructionSize(int /*instruction*/) {return 1;}
 	virtual bool IsAlive() {return true;}
diff --git a/Source/Core/Common/GekkoDisassembler.cpp b/Source/Core/Common/GekkoDisassembler.cpp
new file mode 100644
index 0000000000..464d1cb4f5
--- /dev/null
+++ b/Source/Core/Common/GekkoDisassembler.cpp
@@ -0,0 +1,2299 @@
+/* $VER: ppc_disasm.c V1.5 (27.05.2009)
+ *
+ * Disassembler module for the PowerPC microprocessor family
+ * Copyright (c) 1998-2001,2009,2011 Frank Wille
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Modified for use with Dolphin
+
+#include <string>
+
+#include "Common/CommonTypes.h"
+#include "Common/GekkoDisassembler.h"
+#include "Common/StringUtil.h"
+
+// version/revision
+#define PPCDISASM_VER 1
+#define PPCDISASM_REV 6
+
+// general defines
+#define PPCIDXMASK      0xfc000000
+#define PPCIDX2MASK     0x000007fe
+#define PPCDMASK        0x03e00000
+#define PPCAMASK        0x001f0000
+#define PPCBMASK        0x0000f800
+#define PPCCMASK        0x000007c0
+#define PPCMMASK        0x0000003e
+#define PPCCRDMASK      0x03800000
+#define PPCCRAMASK      0x001c0000
+#define PPCLMASK        0x00600000
+#define PPCOE           0x00000400
+#define PPCVRC          0x00000400
+#define PPCDST          0x02000000
+#define PPCSTRM         0x00600000
+
+#define PPCIDXSH        26
+#define PPCDSH          21
+#define PPCASH          16
+#define PPCBSH          11
+#define PPCCSH          6
+#define PPCMSH          1
+#define PPCCRDSH        23
+#define PPCCRASH        18
+#define PPCLSH          21
+#define PPCIDX2SH       1
+
+#define PPCGETIDX(x)    (((x)&PPCIDXMASK)>>PPCIDXSH)
+#define PPCGETD(x)      (((x)&PPCDMASK)>>PPCDSH)
+#define PPCGETA(x)      (((x)&PPCAMASK)>>PPCASH)
+#define PPCGETB(x)      (((x)&PPCBMASK)>>PPCBSH)
+#define PPCGETC(x)      (((x)&PPCCMASK)>>PPCCSH)
+#define PPCGETM(x)      (((x)&PPCMMASK)>>PPCMSH)
+#define PPCGETCRD(x)    (((x)&PPCCRDMASK)>>PPCCRDSH)
+#define PPCGETCRA(x)    (((x)&PPCCRAMASK)>>PPCCRASH)
+#define PPCGETL(x)      (((x)&PPCLMASK)>>PPCLSH)
+#define PPCGETIDX2(x)   (((x)&PPCIDX2MASK)>>PPCIDX2SH)
+#define PPCGETSTRM(x)   (((x)&PPCSTRM)>>PPCDSH)
+
+
+static const char* trap_condition[32] = {
+	nullptr, "lgt",   "llt",   nullptr, "eq",    "lge",   "lle",   nullptr,
+	"gt",    nullptr, nullptr, nullptr, "ge",    nullptr, nullptr, nullptr,
+	"lt",    nullptr, nullptr, nullptr, "le",    nullptr, nullptr, nullptr,
+	"ne",    nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr
+};
+
+static const char* cmpname[4] = {
+	"cmpw", "cmpd", "cmplw", "cmpld"
+};
+
+static const char* b_ext[4] = {
+	"", "l", "a", "la"
+};
+
+static const char* b_condition[8] = {
+	"ge", "le", "ne", "ns", "lt", "gt", "eq", "so"
+};
+
+static const char* b_decr[16] = {
+	"nzf", "zf", nullptr, nullptr, "nzt", "zt", nullptr, nullptr,
+	"nz",  "z",  nullptr, nullptr, "nz",  "z",  nullptr, nullptr
+};
+
+static const char* regsel[2] = {
+	"", "r"
+};
+
+static const char* oesel[2] = {
+	"", "o"
+};
+
+static const char* rcsel[2] = {
+	"", "."
+};
+
+static const char* ldstnames[24] = {
+	"lwz", "lwzu", "lbz", "lbzu", "stw", "stwu", "stb", "stbu", "lhz", "lhzu",
+	"lha", "lhau", "sth", "sthu", "lmw", "stmw", "lfs", "lfsu", "lfd", "lfdu",
+	"stfs", "stfsu", "stfd", "stfdu"
+};
+
+static const char* regnames[32] = {
+	"r0", "sp", "rtoc", "r3", "r4", "r5", "r6", "r7",
+	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+	"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
+};
+
+// Initialize static class variables.
+u32* GekkoDisassembler::m_instr = nullptr;
+u32* GekkoDisassembler::m_iaddr = nullptr;
+std::string GekkoDisassembler::m_opcode = "";
+std::string GekkoDisassembler::m_operands = "";
+unsigned char GekkoDisassembler::m_type = 0;
+unsigned char GekkoDisassembler::m_flags = PPCF_ILLEGAL;
+unsigned short GekkoDisassembler::m_sreg = 0;
+u32 GekkoDisassembler::m_displacement = 0;
+
+
+static std::string spr_name(int i)
+{
+	switch (i)
+	{
+	case 1: return "XER";
+	case 8: return "LR";
+	case 9: return "CTR";
+	case 18: return "DSIR";
+	case 19: return "DAR";
+	case 22: return "DEC";
+	case 25: return "SDR1";
+	case 26: return "SRR0";
+	case 27: return "SRR1";
+	case 272: return "SPRG0";
+	case 273: return "SPRG1";
+	case 274: return "SPRG2";
+	case 275: return "SPRG3";
+	case 282: return "EAR";
+	case 287: return "PVR";
+	case 528: return "IBAT0U";
+	case 529: return "IBAT0L";
+	case 530: return "IBAT1U";
+	case 531: return "IBAT1L";
+	case 532: return "IBAT2U";
+	case 533: return "IBAT2L";
+	case 534: return "IBAT3U";
+	case 535: return "IBAT3L";
+	case 536: return "DBAT0U";
+	case 537: return "DBAT0L";
+	case 538: return "DBAT1U";
+	case 539: return "DBAT1L";
+	case 540: return "DBAT2U";
+	case 541: return "DBAT2L";
+	case 542: return "DBAT3U";
+	case 543: return "DBAT3L";
+	case 912: return "GQR0";
+	case 913: return "GQR1";
+	case 914: return "GQR2";
+	case 915: return "GQR3";
+	case 916: return "GQR4";
+	case 917: return "GQR5";
+	case 918: return "GQR6";
+	case 919: return "GQR7";
+	case 920: return "HID2";
+	case 921: return "WPAR";
+	case 922: return "DMA_U";
+	case 923: return "DMA_L";
+	case 924: return "ECID_U";
+	case 925: return "ECID_M";
+	case 926: return "ECID_L";
+	case 936: return "UMMCR0";
+	case 937: return "UPMC1";
+	case 938: return "UPMC2";
+	case 939: return "USIA";
+	case 940: return "UMMCR1";
+	case 941: return "UPMC3";
+	case 942: return "UPMC4";
+	case 943: return "USDA";
+	case 952: return "MMCR0";
+	case 953: return "PMC1";
+	case 954: return "PMC2";
+	case 955: return "SIA";
+	case 956: return "MMCR1";
+	case 957: return "PMC3";
+	case 958: return "PMC4";
+	case 959: return "SDA";
+	case 1008: return "HID0";
+	case 1009: return "HID1";
+	case 1010: return "IABR";
+	case 1011: return "HID4";
+	case 1013: return "DABR";
+	case 1017: return "L2CR";
+	case 1019: return "ICTC";
+	case 1020: return "THRM1";
+	case 1021: return "THRM2";
+	case 1022: return "THRM3";
+	}
+
+	return StringFromFormat("%d", i);
+}
+
+
+static u32 swapda(u32 w)
+{
+	return ((w & 0xfc00ffff) | ((w&PPCAMASK) << 5) | ((w&PPCDMASK) >> 5));
+}
+
+
+static u32 swapab(u32 w)
+{
+	return ((w & 0xffe007ff) | ((w&PPCBMASK) << 5) | ((w&PPCAMASK) >> 5));
+}
+
+
+void GekkoDisassembler::ill(u32 in)
+{
+	if (in == 0)
+	{
+		m_opcode = "";
+		m_operands = "---";
+	}
+	else
+	{
+		m_opcode = "(ill)";
+		m_operands =  StringFromFormat("%08x", in);
+	}
+
+	m_flags |= PPCF_ILLEGAL;
+}
+
+// Generate immediate instruction operand.
+//
+// Type 0: D-mode, D,A,imm
+// Type 1: S-mode, A,S,imm
+// Type 2: S/D register is ignored (trap,cmpi)
+// Type 3: A register is ignored (li)
+std::string GekkoDisassembler::imm(u32 in, int uimm, int type, bool hex)
+{
+	int i = (int)(in & 0xffff);
+
+	m_type = PPCINSTR_IMM;
+
+	if (uimm == 0)
+	{
+		if (i > 0x7fff)
+			i -= 0x10000;
+	}
+	else
+	{
+		m_flags |= PPCF_UNSIGNED;
+	}
+	m_displacement = i;
+
+	switch (type)
+	{
+	case 0:
+		return StringFromFormat("%s, %s, %d", regnames[(int)PPCGETD(in)], regnames[(int)PPCGETA(in)], i);
+
+	case 1:
+		if (hex)
+			return StringFromFormat("%s, %s, 0x%.4X", regnames[(int)PPCGETA(in)], regnames[(int)PPCGETD(in)], i);
+		else
+			return StringFromFormat("%s, %s, %d", regnames[(int)PPCGETA(in)], regnames[(int)PPCGETD(in)], i);
+
+	case 2:
+		return StringFromFormat("%s, %d", regnames[(int)PPCGETA(in)], i);
+
+	case 3:
+		if (hex)
+			return StringFromFormat("%s, 0x%.4X", regnames[(int)PPCGETD(in)], i);
+		else
+			return StringFromFormat("%s, %d", regnames[(int)PPCGETD(in)], i);
+
+	default:
+		return StringFromFormat("%s", "imm(): Wrong type");
+	}
+}
+
+
+std::string GekkoDisassembler::ra_rb(u32 in)
+{
+	return StringFromFormat("%s, %s", regnames[(int)PPCGETA(in)], regnames[(int)PPCGETB(in)]);
+}
+
+
+std::string GekkoDisassembler::rd_ra_rb(u32 in, int mask)
+{
+	std::string result;
+
+	if (mask)
+	{
+		if (mask & 4)
+			result += StringFromFormat("%s, ", regnames[(int)PPCGETD(in)]);
+		if (mask & 2)
+			result += StringFromFormat("%s, ", regnames[(int)PPCGETA(in)]);
+		if (mask & 1)
+			result += StringFromFormat("%s, ", regnames[(int)PPCGETB(in)]);
+
+		size_t pos = result.rfind(", ");
+		if (pos != std::string::npos)
+		{
+			result.erase(pos, result.length() - pos);
+		}
+	}
+
+	return result;
+}
+
+
+std::string GekkoDisassembler::fd_ra_rb(u32 in, int mask)
+{
+	std::string result;
+
+	if (mask)
+	{
+		if (mask & 4)
+			result += StringFromFormat("f%d,", (int)PPCGETD(in));
+		if (mask & 2)
+			result += StringFromFormat("%s,", regnames[(int)PPCGETA(in)]);
+		if (mask & 1)
+			result += StringFromFormat("%s,", regnames[(int)PPCGETB(in)]);
+
+		// Drop the trailing comma
+		result.pop_back();
+	}
+
+	return result;
+}
+
+
+void GekkoDisassembler::trapi(u32 in, unsigned char dmode)
+{
+	const char* cnd = trap_condition[PPCGETD(in)];
+
+	if (cnd != nullptr)
+	{
+		m_flags |= dmode;
+		m_opcode = StringFromFormat("t%c%s", dmode ? 'd' : 'w', cnd);
+		m_operands = imm(in, 0, 2, false);
+	}
+	else
+	{
+		ill(in);
+	}
+}
+
+
+void GekkoDisassembler::cmpi(u32 in, int uimm)
+{
+	int i = (int)PPCGETL(in);
+
+	if (i < 2)
+	{
+		if (i != 0)
+			m_flags |= PPCF_64;
+
+		m_opcode = StringFromFormat("%si", cmpname[uimm * 2 + i]);
+
+		i = (int)PPCGETCRD(in);
+		if (i != 0)
+		{
+			m_operands += StringFromFormat("cr%c,", '0' + i);
+		}
+
+		m_operands += imm(in, uimm, 2, false);
+	}
+	else
+	{
+		ill(in);
+	}
+}
+
+
+void GekkoDisassembler::addi(u32 in, const std::string& ext)
+{
+	if ((in & 0x08000000) && !PPCGETA(in))
+	{
+		m_opcode = StringFromFormat("l%s", ext.c_str());  // li, lis
+
+		if (ext == "i")
+			m_operands = imm(in, 0, 3, false);
+		else
+			m_operands = imm(in, 1, 3, true);
+	}
+	else
+	{
+		m_opcode = StringFromFormat("%s%s", (in & 0x8000) ? "sub" : "add", ext.c_str());
+
+		if (in & 0x8000)
+			in = (in ^ 0xffff) + 1;
+
+		m_operands = imm(in, 1, 0, false);
+	}
+}
+
+// Build a branch instr. and return number of chars written to operand.
+size_t GekkoDisassembler::branch(u32 in, const char* bname, int aform, int bdisp)
+{
+	int bo = (int)PPCGETD(in);
+	int bi = (int)PPCGETA(in);
+	char y = (char)(bo & 1);
+	const char* ext = b_ext[aform * 2 + (int)(in & 1)];
+
+	if (bdisp < 0)
+		y ^= 1;
+	y = (y != 0) ? '+' : '-';
+
+	if (bo & 4)
+	{
+		// standard case - no decrement
+		if (bo & 16)
+		{
+			// branch always
+			if (PPCGETIDX(in) != 16)
+			{
+				m_opcode = StringFromFormat("b%s%s", bname, ext);
+			}
+			else
+			{
+				m_opcode = StringFromFormat("bc%s", ext);
+				m_operands = StringFromFormat("%d, %d", bo, bi);
+			}
+		}
+		else // Branch conditional
+		{
+			m_opcode = StringFromFormat("b%s%s%s%c", b_condition[((bo & 8) >> 1) + (bi & 3)], bname, ext, y);
+
+			if (bi >= 4)
+			{
+				m_operands = StringFromFormat("cr%d", bi >> 2);
+			}
+		}
+	}
+	else
+	{
+		// CTR is decremented and checked
+		m_opcode = StringFromFormat("bd%s%s%s%c", b_decr[bo >> 1], bname, ext, y);
+
+		if ((bo & 16) == 0)
+		{
+			m_operands = StringFromFormat("%d", bi);
+		}
+	}
+
+	return m_operands.length();
+}
+
+
+void GekkoDisassembler::bc(u32 in)
+{
+	unsigned int d = (int)(in & 0xfffc);
+
+	if (d & 0x8000)
+		d |= 0xffff0000;
+
+	branch(in, "", (in & 2) ? 1 : 0, d);
+
+	if (in & 2)  // AA ?
+		m_operands = StringFromFormat("->0x%.8X", d);
+	else
+		m_operands = StringFromFormat("->0x%.8X", *m_iaddr + d);
+
+	m_type = PPCINSTR_BRANCH;
+	m_displacement = d;
+}
+
+
+void GekkoDisassembler::bli(u32 in)
+{
+	unsigned int d = (unsigned int)(in & 0x3fffffc);
+
+	if (d & 0x02000000)
+		d |= 0xfc000000;
+
+	m_opcode = StringFromFormat("b%s", b_ext[in & 3]);
+
+	if (in & 2)  // AA ?
+		m_operands = StringFromFormat("->0x%.8X", d);
+	else
+		m_operands = StringFromFormat("->0x%.8X", *m_iaddr + d);
+
+	m_type = PPCINSTR_BRANCH;
+	m_displacement = d;
+}
+
+
+void GekkoDisassembler::mcrf(u32 in, char c)
+{
+	if ((in & 0x0063f801) == 0)
+	{
+		m_opcode = StringFromFormat("mcrf%c", c);
+		m_operands = StringFromFormat("cr%d, cr%d", (int)PPCGETCRD(in), (int)PPCGETCRA(in));
+	}
+	else
+	{
+		ill(in);
+	}
+}
+
+
+void GekkoDisassembler::crop(u32 in, const char* n1, const char* n2)
+{
+	int crd = (int)PPCGETD(in);
+	int cra = (int)PPCGETA(in);
+	int crb = (int)PPCGETB(in);
+
+	if ((in & 1) == 0)
+	{
+		m_opcode = StringFromFormat("cr%s", (cra == crb && n2) ? n2 : n1);
+		if (cra == crb && n2)
+			m_operands = StringFromFormat("%d, %d", crd, cra);
+		else
+			m_operands = StringFromFormat("%d, %d, %d", crd, cra, crb);
+	}
+	else
+	{
+		ill(in);
+	}
+}
+
+
+void GekkoDisassembler::nooper(u32 in, const char* name, unsigned char dmode)
+{
+	if (in & (PPCDMASK | PPCAMASK | PPCBMASK | 1))
+	{
+		ill(in);
+	}
+	else
+	{
+		m_flags |= dmode;
+		m_opcode = name;
+	}
+}
+
+void GekkoDisassembler::rlw(u32 in, const char* name, int i)
+{
+	int s = (int)PPCGETD(in);
+	int a = (int)PPCGETA(in);
+	int bsh = (int)PPCGETB(in);
+	int mb = (int)PPCGETC(in);
+	int me = (int)PPCGETM(in);
+
+	m_opcode = StringFromFormat("rlw%s%c", name, in & 1 ? '.' : '\0');
+	m_operands = StringFromFormat("%s, %s, %s%d, %d, %d (%08x)", regnames[a], regnames[s], regsel[i], bsh, mb, me, HelperRotateMask(bsh, mb, me));
+}
+
+
+void GekkoDisassembler::ori(u32 in, const char* name)
+{
+	m_opcode = name;
+	m_operands = imm(in, 1, 1, true);
+}
+
+
+void GekkoDisassembler::rld(u32 in, const char* name, int i)
+{
+	int s = (int)PPCGETD(in);
+	int a = (int)PPCGETA(in);
+	int bsh = i ? (int)PPCGETB(in) : (int)(((in & 2) << 4) + PPCGETB(in));
+	int m = (int)(in & 0x7e0) >> 5;
+
+	m_flags |= PPCF_64;
+	m_opcode = StringFromFormat("rld%s%c", name, in & 1 ? '.' : '\0');
+	m_operands = StringFromFormat("%s, %s, %s%d, %d", regnames[a], regnames[s], regsel[i], bsh, m);
+}
+
+
+void GekkoDisassembler::cmp(u32 in)
+{
+	int i = (int)PPCGETL(in);
+
+	if (i < 2)
+	{
+		if (i != 0)
+			m_flags |= PPCF_64;
+
+		m_opcode = cmpname[((in&PPCIDX2MASK) ? 2 : 0) + i];
+
+		i = (int)PPCGETCRD(in);
+		if (i != 0)
+			m_operands += StringFromFormat("cr%c,", '0' + i);
+
+		m_operands += ra_rb(in);
+	}
+	else
+	{
+		ill(in);
+	}
+}
+
+
+void GekkoDisassembler::trap(u32 in, unsigned char dmode)
+{
+	int to = (int)PPCGETD(in);
+	const char* cnd = trap_condition[to];
+
+	if (cnd != nullptr)
+	{
+		m_flags |= dmode;
+		m_opcode = StringFromFormat("t%c%s", dmode ? 'd' : 'w', cnd);
+		m_operands = ra_rb(in);
+	}
+	else
+	{
+		if (to == 31)
+		{
+			if (dmode)
+			{
+				m_flags |= dmode;
+				m_opcode = "td";
+				m_operands = "31,0,0";
+			}
+			else
+			{
+				m_opcode = "trap";
+			}
+		}
+		else
+		{
+			ill(in);
+		}
+	}
+}
+
+// Standard instruction: xxxx rD,rA,rB
+void GekkoDisassembler::dab(u32 in, const char* name, int mask, int smode, int chkoe, int chkrc, unsigned char dmode)
+{
+	if (chkrc >= 0 && ((in & 1) != (unsigned int)chkrc))
+	{
+		ill(in);
+	}
+	else
+	{
+		m_flags |= dmode;
+
+		// rA,rS,rB
+		if (smode)
+			in = swapda(in);
+
+		m_opcode = StringFromFormat("%s%s%s", name, oesel[chkoe && (in&PPCOE)], rcsel[(chkrc < 0) && (in & 1)]);
+		m_operands = rd_ra_rb(in, mask);
+	}
+}
+
+// Last operand is no register: xxxx rD,rA,NB
+void GekkoDisassembler::rrn(u32 in, const char* name, int smode, int chkoe, int chkrc, unsigned char dmode)
+{
+	if (chkrc >= 0 && ((in & 1) != (unsigned int)chkrc))
+	{
+		ill(in);
+	}
+	else
+	{
+		m_flags |= dmode;
+
+		// rA,rS,NB
+		if (smode)
+			in = swapda(in);
+
+		m_opcode = StringFromFormat("%s%s%s", name, oesel[chkoe && (in&PPCOE)], rcsel[(chkrc < 0) && (in & 1)]);
+
+		m_operands = rd_ra_rb(in, 6);
+		m_operands += StringFromFormat(",%d",(int)PPCGETB(in));
+	}
+}
+
+
+void GekkoDisassembler::mtcr(u32 in)
+{
+	int s = (int)PPCGETD(in);
+	int crm = (int)(in & 0x000ff000) >> 12;
+
+	if (in & 0x00100801)
+	{
+		ill(in);
+	}
+	else
+	{
+		m_opcode = StringFromFormat("mtcr%c", crm == 0xff ? '\0' : 'f');
+
+		if (crm != 0xff)
+			m_operands += StringFromFormat("0x%02x,", crm);
+
+		m_operands += regnames[s];
+	}
+}
+
+
+void GekkoDisassembler::msr(u32 in, int smode)
+{
+	int s = (int)PPCGETD(in);
+	int sr = (int)(in & 0x000f0000) >> 16;
+
+	if (in & 0x0010f801)
+	{
+		ill(in);
+	}
+	else
+	{
+		m_flags |= PPCF_SUPER;
+		m_opcode = StringFromFormat("m%csr", smode ? 't' : 'f');
+
+		if (smode)
+			m_operands = StringFromFormat("%d, %s", sr, regnames[s]);
+		else
+			m_operands = StringFromFormat("%s, %d", regnames[s], sr);
+	}
+}
+
+
+void GekkoDisassembler::mspr(u32 in, int smode)
+{
+	int d = (int)PPCGETD(in);
+	int spr = (int)((PPCGETB(in) << 5) + PPCGETA(in));
+	int fmt = 0;
+
+	if (in & 1)
+	{
+		ill(in);
+	}
+	else
+	{
+		if (spr != 1 && spr != 8 && spr != 9)
+			m_flags |= PPCF_SUPER;
+
+		const char* x;
+		switch (spr)
+		{
+		case 1:
+			x = "xer";
+			break;
+
+		case 8:
+			x = "lr";
+			break;
+
+		case 9:
+			x = "ctr";
+			break;
+
+		default:
+			x = "spr";
+			fmt = 1;
+			break;
+		}
+
+		m_opcode = StringFromFormat("m%c%s", smode ? 't' : 'f', x);
+
+		if (fmt)
+		{
+			if (smode)
+				m_operands = StringFromFormat("%s, %s", spr_name(spr).c_str(), regnames[d]);
+			else
+				m_operands = StringFromFormat("%s, %s", regnames[d], spr_name(spr).c_str());
+		}
+		else
+		{
+			m_operands = regnames[d];
+		}
+	}
+}
+
+
+void GekkoDisassembler::mtb(u32 in)
+{
+	int d = (int)PPCGETD(in);
+	int tbr = (int)((PPCGETB(in) << 5) + PPCGETA(in));
+
+	if (in & 1)
+	{
+		ill(in);
+	}
+	else
+	{
+		m_operands += regnames[d];
+
+		char x;
+		switch (tbr)
+		{
+		case 268:
+			x = 'l';
+			break;
+
+		case 269:
+			x = 'u';
+			break;
+
+		default:
+			x = '\0';
+			m_flags |= PPCF_SUPER;
+			m_operands += StringFromFormat(",%d", tbr);
+			break;
+		}
+
+		m_opcode = StringFromFormat("mftb%c", x);
+	}
+}
+
+
+void GekkoDisassembler::sradi(u32 in)
+{
+	int s = (int)PPCGETD(in);
+	int a = (int)PPCGETA(in);
+	int bsh = (int)(((in & 2) << 4) + PPCGETB(in));
+
+	m_flags |= PPCF_64;
+	m_opcode = StringFromFormat("sradi%c", in & 1 ? '.' : '\0');
+	m_operands = StringFromFormat("%s, %s, %d", regnames[a], regnames[s], bsh);
+}
+
+void GekkoDisassembler::ldst(u32 in, const char* name, char reg, unsigned char dmode)
+{
+	int s = (int)PPCGETD(in);
+	int a = (int)PPCGETA(in);
+	int d = (u32)(in & 0xffff);
+
+	m_type = PPCINSTR_LDST;
+	m_flags |= dmode;
+	m_sreg = (short)a;
+	//  if (d >= 0x8000)
+	//    d -= 0x10000;
+	m_displacement = (u32)d;
+	m_opcode = name;
+
+	if (reg == 'r')
+	{
+		m_operands = StringFromFormat("%s, %s (%s)", regnames[s], ldst_offs(d).c_str(), regnames[a]);
+	}
+	else
+	{
+		m_operands = StringFromFormat("%c%d, %s (%s)", reg, s, ldst_offs(d).c_str(), regnames[a]);
+	}
+}
+
+// Standard floating point instruction: xxxx fD,fA,fC,fB
+void GekkoDisassembler::fdabc(u32 in, const char* name, int mask, unsigned char dmode)
+{
+	int err = 0;
+
+	m_flags |= dmode;
+	m_opcode = StringFromFormat("f%s%s", name, rcsel[in & 1]);
+	m_operands += StringFromFormat("f%d,", (int)PPCGETD(in));
+
+	if (mask & 4)
+		m_operands += StringFromFormat("f%d,", (int)PPCGETA(in));
+	else
+		err |= (int)PPCGETA(in);
+
+	if (mask & 2)
+		m_operands += StringFromFormat("f%d,", (int)PPCGETC(in));
+	else if (PPCGETC(in))
+		err |= (int)PPCGETC(in);
+
+	if (mask & 1)
+		m_operands += StringFromFormat("f%d,", (int)PPCGETB(in));
+	else if (!(mask & 8))
+		err |= (int)PPCGETB(in);
+
+	// Drop the trailing comma
+	m_operands.pop_back();
+
+	if (err)
+		ill(in);
+}
+
+void GekkoDisassembler::fmr(u32 in)
+{
+	m_opcode = StringFromFormat("fmr%s", rcsel[in & 1]);
+	m_operands = StringFromFormat("f%d, f%d", (int)PPCGETD(in), (int)PPCGETB(in));
+}
+
+// Indexed float instruction: xxxx fD,rA,rB
+void GekkoDisassembler::fdab(u32 in, const char* name, int mask)
+{
+	m_opcode = name;
+	m_operands = fd_ra_rb(in, mask);
+}
+
+
+void GekkoDisassembler::fcmp(u32 in, char c)
+{
+	if (in & 0x00600001)
+	{
+		ill(in);
+	}
+	else
+	{
+		m_opcode = StringFromFormat("fcmp%c", c);
+		m_operands = StringFromFormat("cr%d,f%d,f%d", (int)PPCGETCRD(in), (int)PPCGETA(in), (int)PPCGETB(in));
+	}
+}
+
+
+void GekkoDisassembler::mtfsb(u32 in, int n)
+{
+	if (in & (PPCAMASK | PPCBMASK))
+	{
+		ill(in);
+	}
+	else
+	{
+		m_opcode = StringFromFormat("mtfsb%d%s", n, rcsel[in & 1]);
+		m_operands = StringFromFormat("%d", (int)PPCGETD(in));
+	}
+}
+
+
+// Paired instructions
+
+#define RA ((inst >> 16) & 0x1f)
+#define RB ((inst >> 11) & 0x1f)
+#define RC ((inst >> 6) & 0x1f)
+#define RD ((inst >> 21) & 0x1f)
+#define RS ((inst >> 21) & 0x1f)
+#define FA ((inst >> 16) & 0x1f)
+#define FB ((inst >> 11) & 0x1f)
+#define FC ((inst >> 6) & 0x1f)
+#define FD ((inst >> 21) & 0x1f)
+#define FS ((inst >> 21) & 0x1f)
+#define IMM (inst & 0xffff)
+#define UIMM (inst & 0xffff)
+#define OFS (inst & 0xffff)
+#define OPCD ((inst >> 26) & 0x3f)
+#define XO_10 ((inst >> 1) & 0x3ff)
+#define XO_9 ((inst >> 1) & 0x1ff)
+#define XO_5 ((inst >> 1) & 0x1f)
+#define Rc (inst & 1)
+#define SH ((inst >> 11) & 0x1f)
+#define MB ((inst >> 6) & 0x1f)
+#define ME ((inst >> 1) & 0x1f)
+#define OE ((inst >> 10) & 1)
+#define TO ((inst >> 21) & 0x1f)
+#define CRFD ((inst >> 23) & 0x7)
+#define CRFS ((inst >> 18) & 0x7)
+#define CRBD ((inst >> 21) & 0x1f)
+#define CRBA ((inst >> 16) & 0x1f)
+#define CRBB ((inst >> 11) & 0x1f)
+#define L ((inst >> 21) & 1)
+#define NB ((inst >> 11) & 0x1f)
+#define AA ((inst >> 1) & 1)
+#define LK (inst & 1)
+#define LI ((inst >> 2) & 0xffffff)
+#define BO ((inst >> 21) & 0x1f)
+#define BI ((inst >> 16) & 0x1f)
+#define BD ((inst >> 2) & 0x3fff)
+
+#define MTFSFI_IMM ((inst >> 12) & 0xf)
+#define FM ((inst >> 17) & 0xff)
+#define SR ((inst >> 16) & 0xf)
+#define SPR ((inst >> 11) & 0x3ff)
+#define TBR ((inst >> 11) & 0x3ff)
+#define CRM ((inst >> 12) & 0xff)
+
+
+void GekkoDisassembler::ps(u32 inst)
+{
+	switch ((inst >> 1) & 0x1F)
+	{
+	case 6:
+		m_opcode = "ps_lux";
+		m_operands = StringFromFormat("p%u, (r%u + r%u)", FD, RA, RB);
+		return;
+
+	case 18:
+		m_opcode = "ps_div";
+		m_operands = StringFromFormat("p%u, p%u/p%u", FD, FA, FB);
+		return;
+
+	case 20:
+		m_opcode = "ps_sub";
+		m_operands = StringFromFormat("p%u, p%u-p%u", FD, FA, FB);
+		return;
+
+	case 21:
+		m_opcode = "ps_add";
+		m_operands = StringFromFormat("p%u, p%u+p%u", FD, FA, FB);
+		return;
+
+	case 23:
+		m_opcode = "ps_sel";
+		m_operands = StringFromFormat("p%u>=0?p%u:p%u", FD, FA, FC);
+		return;
+
+	case 24:
+		m_opcode = "ps_res";
+		m_operands = StringFromFormat("p%u, (1/p%u)", FD, FB);
+		return;
+
+	case 25:
+		m_opcode = "ps_mul";
+		m_operands = StringFromFormat("p%u, p%u*p%u", FD, FA, FC);
+		return;
+
+	case 26: // rsqrte
+		m_opcode = "ps_rsqrte";
+		m_operands = StringFromFormat("p%u, p%u", FD, FB);
+		return;
+
+	case 28: // msub
+		m_opcode = "ps_msub";
+		m_operands = StringFromFormat("p%u, p%u*p%u-p%u", FD, FA, FC, FB);
+		return;
+
+	case 29: // madd
+		m_opcode = "ps_madd";
+		m_operands = StringFromFormat("p%u, p%u*p%u+p%u", FD, FA, FC, FB);
+		return;
+
+	case 30: // nmsub
+		m_opcode = "ps_nmsub";
+		m_operands = StringFromFormat("p%u, -(p%u*p%u-p%u)", FD, FA, FC, FB);
+		return;
+
+	case 31: // nmadd
+		m_opcode = "ps_nmadd";
+		m_operands = StringFromFormat("p%u, -(p%u*p%u+p%u)", FD, FA, FC, FB);
+		return;
+
+	case 10:
+		m_opcode = "ps_sum0";
+		m_operands = StringFromFormat("p%u, 0=p%u+p%u, 1=p%u", FD, FA, FB, FC);
+		return;
+
+	case 11:
+		m_opcode = "ps_sum1";
+		m_operands = StringFromFormat("p%u, 0=p%u, 1=p%u+p%u", FD, FC, FA, FB);
+		return;
+
+	case 12:
+		m_opcode = "ps_muls0";
+		m_operands = StringFromFormat("p%u, p%u*p%u[0]", FD, FA, FC);
+		return;
+
+	case 13:
+		m_opcode = "ps_muls1";
+		m_operands = StringFromFormat("p%u, p%u*p%u[1]", FD, FA, FC);
+		return;
+
+	case 14:
+		m_opcode = "ps_madds0";
+		m_operands = StringFromFormat("p%u, p%u*p%u[0]+p%u", FD, FA, FC, FB);
+		return;
+
+	case 15:
+		m_opcode = "ps_madds1";
+		m_operands = StringFromFormat("p%u, p%u*p%u[1]+p%u", FD, FA, FC, FB);
+		return;
+	}
+
+	switch ((inst >> 1) & 0x3FF)
+	{
+		// 10-bit suckers  (?)
+	case 40: // nmadd
+		m_opcode = "ps_neg";
+		m_operands = StringFromFormat("p%u, -p%u", FD, FB);
+		return;
+
+	case 72: // nmadd
+		m_opcode = "ps_mr";
+		m_operands = StringFromFormat("p%u, p%u", FD, FB);
+		return;
+
+	case 136:
+		m_opcode = "ps_nabs";
+		m_operands = StringFromFormat("p%u, -|p%u|", FD, FB);
+		return;
+
+	case 264:
+		m_opcode = "ps_abs";
+		m_operands = StringFromFormat("p%u, |p%u|", FD, FB);
+		return;
+
+	case 0:
+		m_opcode = "ps_cmpu0";
+		m_operands = "ps_cmpu0";
+		return;
+
+	case 32:
+		m_opcode = "ps_cmpq0";
+		m_operands = "ps_cmpo0";
+		return;
+
+	case 64:
+		m_opcode = "ps_cmpu1";
+		m_operands = "ps_cmpu1";
+		return;
+
+	case 96:
+		m_opcode = "ps_cmpo1";
+		m_operands = "ps_cmpo1";
+		return;
+
+	case 528:
+		m_opcode = "ps_merge00";
+		m_operands = StringFromFormat("p%u, p%u[0],p%u[0]", FD, FA, FB);
+		return;
+
+	case 560:
+		m_opcode = "ps_merge01";
+		m_operands = StringFromFormat("p%u, p%u[0],p%u[1]", FD, FA, FB);
+		return;
+
+	case 592:
+		m_opcode = "ps_merge10";
+		m_operands = StringFromFormat("p%u, p%u[1],p%u[0]", FD, FA, FB);
+		return;
+
+	case 624:
+		m_opcode = "ps_merge11";
+		m_operands = StringFromFormat("p%u, p%u[1],p%u[1]", FD, FA, FB);
+		return;
+
+	case 1014:
+		m_opcode = "dcbz_l";
+		m_operands = "";
+		return;
+	}
+
+	//	default:
+	m_opcode = StringFromFormat("ps_%i", ((inst >> 1) & 0x1f));
+	m_operands = "---";
+}
+
+void GekkoDisassembler::ps_mem(u32 inst)
+{
+	switch (PPCGETIDX(inst))
+	{
+	case 56:
+		m_opcode = "psq_l";
+		m_operands = StringFromFormat("p%u, %i(r%u)", RS, SEX12(inst & 0xFFF), RA);
+		break;
+
+	case 57:
+		m_opcode = "psq_lu";
+		m_operands = "";
+		break;
+
+	case 60:
+		m_opcode = "psq_st";
+		m_operands = StringFromFormat("%i(r%u), p%u", SEX12(inst & 0xFFF), RA, RS);
+		break;
+
+	case 61:
+		m_opcode = "psq_stu";
+		m_operands = StringFromFormat("r%u, p%u ?", RA, RS);
+		break;
+	}
+}
+
+// Disassemble PPC instruction and return a pointer to the next
+// instruction, or nullptr if an error occured.
+u32* GekkoDisassembler::DoDisassembly(bool big_endian)
+{
+	u32 in = *m_instr;
+
+	if (!big_endian)
+	{
+		in = (in & 0xff) << 24 | (in & 0xff00) << 8 | (in & 0xff0000) >> 8 |
+		     (in & 0xff000000) >> 24;
+	}
+
+	m_opcode.clear();
+	m_operands.clear();
+	m_type = PPCINSTR_OTHER;
+	m_flags = 0;
+
+	switch (PPCGETIDX(in))
+	{
+	case 0:
+		{
+			int block = in & 0x3FFFFFF;
+			if (block)
+			{
+				m_opcode = "JITblock";
+				m_operands = StringFromFormat("%i", block);
+			}
+			else
+			{
+				m_opcode = "";
+				m_operands = "---";
+			}
+		}
+		break;
+
+	case 1: // HLE call
+		m_opcode = "HLE";
+		break;
+
+	case 2:
+		trapi(in, PPCF_64); // tdi
+		break;
+
+	case 3:
+		trapi(in, 0); // twi
+		break;
+
+	case 4:
+		ps(in);
+		break;
+
+	case 56:
+	case 57:
+	case 60:
+	case 61:
+		ps_mem(in);
+		break;
+
+	case 7:
+		m_opcode = "mulli";
+		m_operands = imm(in, 0, 0, false);
+		break;
+
+	case 8:
+		m_opcode = "subfic";
+		m_operands = imm(in, 0, 0, false);
+		break;
+
+	case 10:
+		cmpi(in, 1);      // cmpli
+		break;
+
+	case 11:
+		cmpi(in, 0);      // cmpi
+		break;
+
+	case 12:
+		addi(in, "ic");   // addic
+		break;
+
+	case 13:
+		addi(in, "ic.");  // addic.
+		break;
+
+	case 14:
+		addi(in, "i");    // addi
+		break;
+
+	case 15:
+		addi(in, "is");   // addis
+		break;
+
+	case 16:
+		bc(in);
+		break;
+
+	case 17:
+		if ((in & ~PPCIDXMASK) == 2)
+			m_opcode = "sc";
+		else
+			ill(in);
+		break;
+
+	case 18:
+		bli(in);
+		break;
+
+	case 19:
+		switch (PPCGETIDX2(in))
+		{
+		case 0:
+			mcrf(in, '\0');  // mcrf
+			break;
+
+		case 16:
+			branch(in, "lr", 0, 0);    // bclr
+			break;
+
+		case 33:
+			crop(in, "nor", "not");    // crnor
+			break;
+
+		case 50:
+			nooper(in, "rfi", PPCF_SUPER);
+			break;
+
+		case 129:
+			crop(in, "andc", nullptr); // crandc
+			break;
+
+		case 150:
+			nooper(in, "isync", 0);
+			break;
+
+		case 193:
+			crop(in, "xor", "clr");    // crxor
+			break;
+
+		case 225:
+			crop(in, "nand", nullptr); // crnand
+			break;
+
+		case 257:
+			crop(in, "and", nullptr);  // crand
+			break;
+
+		case 289:
+			crop(in, "eqv", "set");    // creqv
+			break;
+
+		case 417:
+			crop(in, "orc", nullptr);  // crorc
+			break;
+
+		case 449:
+			crop(in, "or", "move");    // cror
+			break;
+
+		case 528:
+			branch(in, "ctr", 0, 0);   // bcctr
+			break;
+
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 20:
+		rlw(in, "imi", 0); // rlwimi
+		break;
+
+	case 21:
+		rlw(in, "inm", 0); // rlwinm
+		break;
+
+	case 23:
+		rlw(in, "nm", 1);  // rlwnm
+		break;
+
+	case 24:
+		if (in & ~PPCIDXMASK)
+			ori(in, "ori");
+		else
+			m_opcode = "nop";
+		break;
+
+	case 25:
+		ori(in, "oris");
+		break;
+
+	case 26:
+		ori(in, "xori");
+		break;
+
+	case 27:
+		ori(in, "xoris");
+		break;
+
+	case 28:
+		ori(in, "andi.");
+		break;
+
+	case 29:
+		ori(in, "andis.");
+		break;
+
+	case 30:
+		switch (in & 0x1c)
+		{
+		case 0:
+			rld(in, "icl", 0);  // rldicl
+			break;
+		case 1:
+			rld(in, "icr", 0);  // rldicr
+			break;
+		case 2:
+			rld(in, "ic", 0);   // rldic
+			break;
+		case 3:
+			rld(in, "imi", 0);  // rldimi
+			break;
+		case 4:
+			rld(in, in & 2 ? "cl" : "cr", 1); // rldcl, rldcr
+			break;
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 31:
+		switch (PPCGETIDX2(in))
+		{
+		case 0:
+		case 32:
+			if (in & 1)
+				ill(in);
+			else
+				cmp(in); // cmp, cmpl
+			break;
+
+		case 4:
+			if (in & 1)
+				ill(in);
+			else
+				trap(in, 0); // tw
+			break;
+
+		case 8:
+		case (PPCOE >> 1) + 8:
+			dab(swapab(in), "subc", 7, 0, 1, -1, 0);
+			break;
+
+		case 9:
+			dab(in, "mulhdu", 7, 0, 0, -1, PPCF_64);
+			break;
+
+		case 10:
+		case (PPCOE >> 1) + 10:
+			dab(in, "addc", 7, 0, 1, -1, 0);
+			break;
+
+		case 11:
+			dab(in, "mulhwu", 7, 0, 0, -1, 0);
+			break;
+
+		case 19:
+			if (in & (PPCAMASK | PPCBMASK))
+				ill(in);
+			else
+				dab(in, "mfcr", 4, 0, 0, 0, 0);
+			break;
+
+		case 20:
+			dab(in, "lwarx", 7, 0, 0, 0, 0);
+			break;
+
+		case 21:
+			dab(in, "ldx", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 23:
+			dab(in, "lwzx", 7, 0, 0, 0, 0);
+			break;
+
+		case 24:
+			dab(in, "slw", 7, 1, 0, -1, 0);
+			break;
+
+		case 26:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "cntlzw", 6, 1, 0, -1, 0);
+			break;
+
+		case 27:
+			dab(in, "sld", 7, 1, 0, -1, PPCF_64);
+			break;
+
+		case 28:
+			dab(in, "and", 7, 1, 0, -1, 0);
+			break;
+
+		case 40:
+		case (PPCOE >> 1) + 40:
+			dab(swapab(in), "sub", 7, 0, 1, -1, 0);
+			break;
+
+		case 53:
+			dab(in, "ldux", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 54:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbst", 3, 0, 0, 0, 0);
+			break;
+
+		case 55:
+			dab(in, "lwzux", 7, 0, 0, 0, 0);
+			break;
+
+		case 58:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "cntlzd", 6, 1, 0, -1, PPCF_64);
+			break;
+
+		case 60:
+			dab(in, "andc", 7, 1, 0, -1, 0);
+			break;
+
+		case 68:
+			trap(in, PPCF_64); // td
+			break;
+
+		case 73:
+			dab(in, "mulhd", 7, 0, 0, -1, PPCF_64);
+			break;
+
+		case 75:
+			dab(in, "mulhw", 7, 0, 0, -1, 0);
+			break;
+
+		case 83:
+			if (in & (PPCAMASK | PPCBMASK))
+				ill(in);
+			else
+				dab(in, "mfmsr", 4, 0, 0, 0, PPCF_SUPER);
+			break;
+
+		case 84:
+			dab(in, "ldarx", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 86:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbf", 3, 0, 0, 0, 0);
+			break;
+
+		case 87:
+			dab(in, "lbzx", 7, 0, 0, 0, 0);
+			break;
+
+		case 104:
+		case (PPCOE >> 1) + 104:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "neg", 6, 0, 1, -1, 0);
+			break;
+
+		case 119:
+			dab(in, "lbzux", 7, 0, 0, 0, 0);
+			break;
+
+		case 124:
+			if (PPCGETD(in) == PPCGETB(in))
+				dab(in, "not", 6, 1, 0, -1, 0);
+			else
+				dab(in, "nor", 7, 1, 0, -1, 0);
+			break;
+
+		case 136:
+		case (PPCOE >> 1) + 136:
+			dab(in, "subfe", 7, 0, 1, -1, 0);
+			break;
+
+		case 138:
+		case (PPCOE >> 1) + 138:
+			dab(in, "adde", 7, 0, 1, -1, 0);
+			break;
+
+		case 144:
+			mtcr(in);
+			break;
+
+		case 146:
+			if (in & (PPCAMASK | PPCBMASK))
+				ill(in);
+			else
+				dab(in, "mtmsr", 4, 0, 0, 0, PPCF_SUPER);
+			break;
+
+		case 149:
+			dab(in, "stdx", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 150:
+			dab(in, "stwcx.", 7, 0, 0, 1, 0);
+			break;
+
+		case 151:
+			dab(in, "stwx", 7, 0, 0, 0, 0);
+			break;
+
+		case 181:
+			dab(in, "stdux", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 183:
+			dab(in, "stwux", 7, 0, 0, 0, 0);
+			break;
+
+		case 200:
+		case (PPCOE >> 1) + 200:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "subfze", 6, 0, 1, -1, 0);
+			break;
+
+		case 202:
+		case (PPCOE >> 1) + 202:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "addze", 6, 0, 1, -1, 0);
+			break;
+
+		case 210:
+			msr(in, 1); // mfsr
+			break;
+
+		case 214:
+			dab(in, "stdcx.", 7, 0, 0, 1, PPCF_64);
+			break;
+
+		case 215:
+			dab(in, "stbx", 7, 0, 0, 0, 0);
+			break;
+
+		case 232:
+		case (PPCOE >> 1) + 232:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "subfme", 6, 0, 1, -1, 0);
+			break;
+
+		case 233:
+		case (PPCOE >> 1) + 233:
+			dab(in, "mulld", 7, 0, 1, -1, PPCF_64);
+			break;
+
+		case 234:
+		case (PPCOE >> 1) + 234:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "addme", 6, 0, 1, -1, 0);
+			break;
+
+		case 235:
+		case (PPCOE >> 1) + 235:
+			dab(in, "mullw", 7, 0, 1, -1, 0);
+			break;
+
+		case 242:
+			if (in & PPCAMASK)
+				ill(in);
+			else
+				dab(in, "mtsrin", 5, 0, 0, 0, PPCF_SUPER);
+			break;
+
+		case 246:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbtst", 3, 0, 0, 0, 0);
+			break;
+
+		case 247:
+			dab(in, "stbux", 7, 0, 0, 0, 0);
+			break;
+
+		case 266:
+		case (PPCOE >> 1) + 266:
+			dab(in, "add", 7, 0, 1, -1, 0);
+			break;
+
+		case 278:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbt", 3, 0, 0, 0, 0);
+			break;
+
+		case 279:
+			dab(in, "lhzx", 7, 0, 0, 0, 0);
+			break;
+
+		case 284:
+			dab(in, "eqv", 7, 1, 0, -1, 0);
+			break;
+
+		case 306:
+			if (in & (PPCDMASK | PPCAMASK))
+				ill(in);
+			else
+				dab(in, "tlbie", 1, 0, 0, 0, PPCF_SUPER);
+			break;
+
+		case 310:
+			dab(in, "eciwx", 7, 0, 0, 0, 0);
+			break;
+
+		case 311:
+			dab(in, "lhzux", 7, 0, 0, 0, 0);
+			break;
+
+		case 316:
+			dab(in, "xor", 7, 1, 0, -1, 0);
+			break;
+
+		case 339:
+			mspr(in, 0); // mfspr
+			break;
+
+		case 341:
+			dab(in, "lwax", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 343:
+			dab(in, "lhax", 7, 0, 0, 0, 0);
+			break;
+
+		case 370:
+			nooper(in, "tlbia", PPCF_SUPER);
+			break;
+
+		case 371:
+			mtb(in); // mftb
+			break;
+
+		case 373:
+			dab(in, "lwaux", 7, 0, 0, 0, PPCF_64);
+			break;
+
+		case 375:
+			dab(in, "lhaux", 7, 0, 0, 0, 0);
+			break;
+
+		case 407:
+			dab(in, "sthx", 7, 0, 0, 0, 0);
+			break;
+
+		case 412:
+			dab(in, "orc", 7, 1, 0, -1, 0);
+			break;
+
+		case 413:
+			sradi(in); // sradi
+			break;
+
+		case 434:
+			if (in & (PPCDMASK | PPCAMASK))
+				ill(in);
+			else
+				dab(in, "slbie", 1, 0, 0, 0, PPCF_SUPER | PPCF_64);
+			break;
+
+		case 438:
+			dab(in, "ecowx", 7, 0, 0, 0, 0);
+			break;
+
+		case 439:
+			dab(in, "sthux", 7, 0, 0, 0, 0);
+			break;
+
+		case 444:
+			if (PPCGETD(in) == PPCGETB(in))
+				dab(in, "mr", 6, 1, 0, -1, 0);
+			else
+				dab(in, "or", 7, 1, 0, -1, 0);
+			break;
+
+		case 457:
+		case (PPCOE >> 1) + 457:
+			dab(in, "divdu", 7, 0, 1, -1, PPCF_64);
+			break;
+
+		case 459:
+		case (PPCOE >> 1) + 459:
+			dab(in, "divwu", 7, 0, 1, -1, 0);
+			break;
+
+		case 467:
+			mspr(in, 1); // mtspr
+			break;
+
+		case 470:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbi", 3, 0, 0, 0, 0);
+			break;
+
+		case 476:
+			dab(in, "nand", 7, 1, 0, -1, 0);
+			break;
+
+		case 489:
+		case (PPCOE >> 1) + 489:
+			dab(in, "divd", 7, 0, 1, -1, PPCF_64);
+			break;
+
+		case 491:
+		case (PPCOE >> 1) + 491:
+			dab(in, "divw", 7, 0, 1, -1, 0);
+			break;
+
+		case 498:
+			nooper(in, "slbia", PPCF_SUPER | PPCF_64);
+			break;
+
+		case 512:
+			if (in & 0x007ff801)
+			{
+				ill(in);
+			}
+			else
+			{
+				m_opcode = "mcrxr";
+				m_operands = StringFromFormat("cr%d", (int)PPCGETCRD(in));
+			}
+			break;
+
+		case 533:
+			dab(in, "lswx", 7, 0, 0, 0, 0);
+			break;
+
+		case 534:
+			dab(in, "lwbrx", 7, 0, 0, 0, 0);
+			break;
+
+		case 535:
+			fdab(in, "lfsx", 7);
+			break;
+
+		case 536:
+			dab(in, "srw", 7, 1, 0, -1, 0);
+			break;
+
+		case 539:
+			dab(in, "srd", 7, 1, 0, -1, PPCF_64);
+			break;
+
+		case 566:
+			nooper(in, "tlbsync", PPCF_SUPER);
+			break;
+
+		case 567:
+			fdab(in, "lfsux", 7);
+			break;
+
+		case 595:
+			msr(in, 0); // mfsr
+			break;
+
+		case 597:
+			rrn(in, "lswi", 0, 0, 0, 0);
+			break;
+
+		case 598:
+			nooper(in, "sync", PPCF_SUPER);
+			break;
+
+		case 599:
+			fdab(in, "lfdx", 7);
+			break;
+
+		case 631:
+			fdab(in, "lfdux", 7);
+			break;
+
+		case 659:
+			if (in & PPCAMASK)
+				ill(in);
+			else
+				dab(in, "mfsrin", 5, 0, 0, 0, PPCF_SUPER);
+			break;
+
+		case 661:
+			dab(in, "stswx", 7, 0, 0, 0, 0);
+			break;
+
+		case 662:
+			dab(in, "stwbrx", 7, 0, 0, 0, 0);
+			break;
+
+		case 663:
+			fdab(in, "stfsx", 7);
+			break;
+
+		case 695:
+			fdab(in, "stfsux", 7);
+			break;
+
+		case 725:
+			rrn(in, "stswi", 0, 0, 0, 0);
+			break;
+
+		case 727:
+			fdab(in, "stfdx", 7);
+			break;
+
+		case 759:
+			fdab(in, "stfdux", 7);
+			break;
+
+		case 790:
+			dab(in, "lhbrx", 7, 0, 0, 0, 0);
+			break;
+
+		case 792:
+			dab(in, "sraw", 7, 1, 0, -1, 0);
+			break;
+
+		case 794:
+			dab(in, "srad", 7, 1, 0, -1, PPCF_64);
+			break;
+
+		case 824:
+			rrn(in, "srawi", 1, 0, -1, 0);
+			break;
+
+		case 854:
+			nooper(in, "eieio", PPCF_SUPER);
+			break;
+
+		case 918:
+			dab(in, "sthbrx", 7, 0, 0, 0, 0);
+			break;
+
+		case 922:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "extsh", 6, 1, 0, -1, 0);
+			break;
+
+		case 954:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "extsb", 6, 1, 0, -1, 0);
+			break;
+
+		case 982:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "icbi", 3, 0, 0, 0, 0);
+			break;
+
+		case 983:
+			fdab(in, "stfiwx", 7);
+			break;
+
+		case 986:
+			if (in & PPCBMASK)
+				ill(in);
+			else
+				dab(in, "extsw", 6, 1, 0, -1, PPCF_64);
+			break;
+
+		case 1014:
+			if (in & PPCDMASK)
+				ill(in);
+			else
+				dab(in, "dcbz", 3, 0, 0, 0, 0);
+			break;
+
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 32:
+	case 33:
+	case 34:
+	case 35:
+	case 36:
+	case 37:
+	case 38:
+	case 39:
+	case 40:
+	case 41:
+	case 42:
+	case 43:
+	case 44:
+	case 45:
+	case 46:
+	case 47:
+		ldst(in, ldstnames[PPCGETIDX(in) - 32], 'r', 0);
+		break;
+
+	case 48:
+	case 49:
+	case 50:
+	case 51:
+	case 52:
+	case 53:
+	case 54:
+	case 55:
+		ldst(in, ldstnames[PPCGETIDX(in) - 32], 'f', 0);
+		break;
+
+	case 58:
+		switch (in & 3)
+		{
+		case 0:
+			ldst(in&~3, "ld", 'r', PPCF_64);
+			break;
+		case 1:
+			ldst(in&~3, "ldu", 'r', PPCF_64);
+			break;
+		case 2:
+			ldst(in&~3, "lwa", 'r', PPCF_64);
+			break;
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 59:
+		switch (in & 0x3e)
+		{
+		case 36:
+			fdabc(in, "divs", 5, 0);
+			break;
+
+		case 40:
+			fdabc(in, "subs", 5, 0);
+			break;
+
+		case 42:
+			fdabc(in, "adds", 5, 0);
+			break;
+
+		case 44:
+			fdabc(in, "sqrts", 2, 0);
+			break;
+
+		case 48:
+			fdabc(in, "res", 2, 0);
+			break;
+
+		case 50:
+			fdabc(in, "muls", 6, 0);
+			break;
+
+		case 56:
+			fdabc(in, "msubs", 7, 0);
+			break;
+
+		case 58:
+			fdabc(in, "madds", 7, 0);
+			break;
+
+		case 60:
+			fdabc(in, "nmsubs", 7, 0);
+			break;
+
+		case 62:
+			fdabc(in, "nmadds", 7, 0);
+			break;
+
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 62:
+		switch (in & 3)
+		{
+		case 0:
+			ldst(in&~3, "std", 'r', PPCF_64);
+			break;
+		case 1:
+			ldst(in&~3, "stdu", 'r', PPCF_64);
+			break;
+		default:
+			ill(in);
+			break;
+		}
+		break;
+
+	case 63:
+		if (in & 32)
+		{
+			switch (in & 0x1e)
+			{
+			case 4:
+				fdabc(in, "div", 5, 0);
+				break;
+
+			case 8:
+				fdabc(in, "sub", 5, 0);
+				break;
+
+			case 10:
+				fdabc(in, "add", 5, 0);
+				break;
+
+			case 12:
+				fdabc(in, "sqrt", 2, 0);
+				break;
+
+			case 14:
+				fdabc(in, "sel", 7, 0);
+				break;
+
+			case 18:
+				fdabc(in, "mul", 6, 0);
+				break;
+
+			case 20:
+				fdabc(in, "rsqrte", 1, 0);
+				break;
+
+			case 24:
+				fdabc(in, "msub", 7, 0);
+				break;
+
+			case 26:
+				fdabc(in, "madd", 7, 0);
+				break;
+
+			case 28:
+				fdabc(in, "nmsub", 7, 0);
+				break;
+
+			case 30:
+				fdabc(in, "nmadd", 7, 0);
+				break;
+
+			case 52:
+				m_opcode = "XXX dp 52";
+				break;
+
+			default:
+				ill(in);
+				break;
+			}
+		}
+		else
+		{
+			switch (PPCGETIDX2(in))
+			{
+			case 0:
+				fcmp(in, 'u');
+				break;
+
+			case 12:
+				fdabc(in, "rsp", 1, 0);
+				break;
+
+			case 14:
+				fdabc(in, "ctiw", 1, 0);
+				break;
+
+			case 15:
+				fdabc(in, "ctiwz", 1, 0);
+				break;
+
+			case 32:
+				fcmp(in, 'o');
+				break;
+
+			case 38:
+				mtfsb(in, 1);
+				break;
+
+			case 40:
+				fdabc(in, "neg", 10, 0);
+				break;
+
+			case 64:
+				mcrf(in, 's'); // mcrfs
+				break;
+
+			case 70:
+				mtfsb(in, 0);
+				break;
+
+			case 72:
+				fmr(in);
+				break;
+
+			case 134:
+				if ((in & 0x006f0800) == 0)
+				{
+					m_opcode = StringFromFormat("mtfsfi%s", rcsel[in & 1]);
+					m_operands = StringFromFormat("cr%d,%d", (int)PPCGETCRD(in), (int)(in & 0xf000) >> 12);
+				}
+				else
+				{
+					ill(in);
+				}
+				break;
+
+			case 136:
+				fdabc(in, "nabs", 10, 0);
+				break;
+
+			case 264:
+				fdabc(in, "abs", 10, 0);
+				break;
+
+			case 583:
+				if (in & (PPCAMASK | PPCBMASK))
+					ill(in);
+				else
+					dab(in, "mffs", 4, 0, 0, -1, 0);
+				break;
+
+			case 711:
+				if ((in & 0x02010000) == 0)
+				{
+					m_opcode = StringFromFormat("mtfsf%s", rcsel[in & 1]);
+					m_operands = StringFromFormat("0x%x,%u", (unsigned int)(in & 0x01fe) >> 17, (int)PPCGETB(in));
+				}
+				else
+				{
+					ill(in);
+				}
+				break;
+
+			case 814:
+				fdabc(in, "fctid", 10, PPCF_64);
+				break;
+
+			case 815:
+				fdabc(in, "fctidz", 10, PPCF_64);
+				break;
+
+			case 846:
+				fdabc(in, "fcfid", 10, PPCF_64);
+				break;
+
+			default:
+				ill(in);
+				break;
+			}
+		}
+		break;
+
+	default:
+		ill(in);
+		break;
+	}
+	return (m_instr + 1);
+}
+
+// simplified interface
+std::string GekkoDisassembler::Disassemble(u32 opcode, u32 current_instruction_address, bool big_endian)
+{
+	u32 opc = opcode;
+	u32 addr = current_instruction_address;
+
+	m_instr = (u32*)&opc;
+	m_iaddr = (u32*)&addr;
+
+	DoDisassembly(big_endian);
+
+	return m_opcode.append("\t").append(m_operands);
+}
+
+static const char* gprnames[] =
+{
+	" r0", " r1", " r2", " r3", " r4", " r5", " r6", " r7",
+	" r8", " r9", "r10", "r11", "r12", "r13", "r14", "r15",
+	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+	"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
+};
+
+const char* GekkoDisassembler::GetGPRName(u32 index)
+{
+	if (index < 32)
+		return gprnames[index];
+
+	return 0;
+}
+
+static const char* fprnames[] =
+{
+	" f0", " f1", " f2", " f3", " f4", " f5", " f6", " f7",
+	" f8", " f9", "f10", "f11", "f12", "f13", "f14", "f15",
+	"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+	"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31"
+};
+
+const char* GekkoDisassembler::GetFPRName(u32 index)
+{
+	if (index < 32)
+		return fprnames[index];
+
+	return 0;
+}
diff --git a/Source/Core/Common/GekkoDisassembler.h b/Source/Core/Common/GekkoDisassembler.h
new file mode 100644
index 0000000000..113c843baa
--- /dev/null
+++ b/Source/Core/Common/GekkoDisassembler.h
@@ -0,0 +1,152 @@
+/* $VER: ppc_disasm.h V1.6 (09.12.2011)
+ *
+ * Disassembler module for the PowerPC microprocessor family
+ * Copyright (c) 1998-2001,2009,2011 Frank Wille
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Modified for use with Dolphin
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+
+#include "Common/CommonTypes.h"
+#include "Common/StringUtil.h"
+
+class GekkoDisassembler final
+{
+public:
+	static std::string Disassemble(u32 opcode, u32 current_instruction_address, bool big_endian = true);
+	static const char* GetGPRName(u32 index);
+	static const char* GetFPRName(u32 index);
+
+private:
+	GekkoDisassembler() = delete;
+
+	static void ill(u32 in);
+	static std::string imm(u32 in, int uimm, int type, bool hex);
+
+	static std::string ra_rb(u32 in);
+	static std::string rd_ra_rb(u32 in, int mask);
+	static std::string fd_ra_rb(u32 in, int mask);
+
+	static void trapi(u32 in, unsigned char dmode);
+	static void cmpi(u32 in, int uimm);
+	static void addi(u32 in, const std::string& ext);
+	static size_t branch(u32 in, const char* bname, int aform, int bdisp);
+	static void bc(u32 in);
+	static void bli(u32 in);
+	static void mcrf(u32 in, char c);
+	static void crop(u32 in, const char* n1, const char* n2);
+	static void nooper(u32 in, const char* name, unsigned char dmode);
+	static void rlw(u32 in, const char* name, int i);
+	static void ori(u32 in, const char* name);
+	static void rld(u32 in, const char* name, int i);
+	static void cmp(u32 in);
+	static void trap(u32 in, unsigned char dmode);
+	static void dab(u32 in, const char* name, int mask, int smode, int chkoe, int chkrc, unsigned char dmode);
+	static void rrn(u32 in, const char* name, int smode, int chkoe, int chkrc, unsigned char dmode);
+	static void mtcr(u32 in);
+	static void msr(u32 in, int smode);
+	static void mspr(u32 in, int smode);
+	static void mtb(u32 in);
+	static void sradi(u32 in);
+	static void ldst(u32 in, const char* name, char reg, unsigned char dmode);
+	static void fdabc(u32 in, const char* name, int mask, unsigned char dmode);
+	static void fmr(u32 in);
+	static void fdab(u32 in, const char* name, int mask);
+	static void fcmp(u32 in, char c);
+	static void mtfsb(u32 in, int n);
+	static void ps(u32 inst);
+	static void ps_mem(u32 inst);
+
+	static u32* DoDisassembly(bool big_endian);
+
+	static u32 HelperRotateMask(int r, int mb, int me)
+	{
+		//first make 001111111111111 part
+		unsigned int begin = 0xFFFFFFFF >> mb;
+		//then make 000000000001111 part, which is used to flip the bits of the first one
+		unsigned int end = me < 31 ? (0xFFFFFFFF >> (me + 1)) : 0;
+		//do the bitflip
+		unsigned int mask = begin ^ end;
+		//and invert if backwards
+		if (me < mb)
+			mask = ~mask;
+		//rotate the mask so it can be applied to source reg
+		//return _rotl(mask, 32 - r);
+		return (mask << (32 - r)) | (mask >> r);
+	}
+
+	static std::string ldst_offs(u32 val)
+	{
+		if (val == 0)
+		{
+			return "0";
+		}
+		else
+		{
+			if (val & 0x8000)
+			{
+				return StringFromFormat("-0x%.4X", ((~val) & 0xffff) + 1);
+			}
+			else
+			{
+				return StringFromFormat("0x%.4X", val);
+			}
+		}
+	}
+
+	static int SEX12(u32 x)
+	{
+		return x & 0x800 ? (x | 0xFFFFF000) : x;
+	}
+
+	enum InstructionType
+	{
+		PPCINSTR_OTHER  = 0, // No additional info for other instr.
+		PPCINSTR_BRANCH = 1, // Branch dest. = PC+displacement
+		PPCINSTR_LDST   = 2, // Load/store instruction: displ(sreg)
+		PPCINSTR_IMM    = 3, // 16-bit immediate val. in displacement
+	};
+
+	enum Flags
+	{
+		PPCF_ILLEGAL  = (1 << 0), // Illegal PowerPC instruction
+		PPCF_UNSIGNED = (1 << 1), // Unsigned immediate instruction
+		PPCF_SUPER    = (1 << 2), // Supervisor level instruction
+		PPCF_64       = (1 << 3), // 64-bit only instruction
+	};
+
+	static u32* m_instr;           // Pointer to instruction to disassemble
+	static u32* m_iaddr;           // Instruction.address., usually the same as instr
+	static std::string m_opcode;   // Buffer for opcode, min. 10 chars.
+	static std::string m_operands; // Operand buffer, min. 24 chars.
+	static unsigned char m_type;   // Type of instruction, see below
+	static unsigned char m_flags;  // Additional flags
+	static unsigned short m_sreg;  // Register in load/store instructions
+	static u32 m_displacement;     // Branch- or load/store displacement
+};