SilentPatchIII: Add GCC-style inline assembly statements

These almost work on llvm-mingw too (but there's some stubborn call instructions)

SilentPatchIII/SilentPatchIII.cpp

@@ -196,6 +196,7 @@ void ResetMousePos()
 
 __declspec(naked) void M16StatsFix()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		add		eax, 0x34
@@ -204,11 +205,23 @@ __declspec(naked) void M16StatsFix()
 		inc		dword ptr [ecx]
 		ret
 	}
+#else
+	__asm__ volatile
+	(
+		"add 	eax, 0x34\n"
+		"add 	ebx, 0x34\n"
+		"mov 	ecx, %[InstantHitsFiredByPlayer]\n"
+		"inc 	dword ptr [ecx]\n"
+		"ret"
+		:: [InstantHitsFiredByPlayer] "m" (InstantHitsFiredByPlayer)
+	);
+#endif
 }
 
 static const float fMinusOne = -1.0f;
 __declspec(naked) void HeadlightsFix()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		fld		dword ptr [esp+0x708-0x690]
@@ -226,6 +239,27 @@ __declspec(naked) void HeadlightsFix()
 		fld		st
 		jmp		HeadlightsFix_JumpBack
 	}
+#else
+	__asm__ volatile
+	(
+		"fld	dword ptr [esp+0x708-0x690]\n"
+		"fcomp	%[fMinusOne]\n"
+		"fnstsw	ax\n"
+		"and	ah, 5\n"
+		"cmp	ah, 1\n"
+		"jnz	HeadlightsFix_DontLimit\n"
+		"fld	%[fMinusOne]\n"
+		"fstp	dword ptr [esp+0x708-0x690]\n"
+
+"HeadlightsFix_DontLimit:\n"
+		"fld	dword ptr [esp+0x708-0x690]\n"
+		"fabs\n"
+		"fld	st\n"
+		"jmp	%[HeadlightsFix_JumpBack]"
+		:: [fMinusOne] "f" (fMinusOne),
+		[HeadlightsFix_JumpBack] "m" (HeadlightsFix_JumpBack)
+	);
+#endif
 }
 
 static float fShadowXSize, fShadowYSize;
@@ -314,6 +348,7 @@ float FixedRefValue()
 
 __declspec(naked) void SubtitlesShadowFix()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		push	eax
@@ -322,10 +357,24 @@ __declspec(naked) void SubtitlesShadowFix()
 		fadd	fShadowYSize
 		jmp		SubtitlesShadowFix_JumpBack
 	}
+#else
+	__asm__ volatile
+	(
+		"push	eax\n"
+		"call	%[Recalculate]\n"
+		"fadd	dword ptr [esp+0x50+8]\n"
+		"fadd	%[fShadowYSize]\n"
+		"jmp 	%[SubtitlesShadowFix_JumpBack]"
+		:: [Recalculate] "i" (Recalculate),
+		[fShadowYSize] "m" (fShadowYSize),
+		[SubtitlesShadowFix_JumpBack] "m" (SubtitlesShadowFix_JumpBack)
+	);
+#endif
 }
 
 __declspec(naked) void III_SensResetFix()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		mov     ecx, 0x3A76
@@ -337,12 +386,26 @@ __declspec(naked) void III_SensResetFix()
 		fstp	dword ptr [ebp+0x194]
 		ret
 	}
+#else
+	__asm__ volatile
+	(
+		"mov	ecx, 0x3A76\n"
+		"mov	edi, ebp\n"
+		"fld	dword ptr [ebp+0x194]\n"
+		"fld	dword ptr [ebp+0x198]\n"
+		"rep	stosd\n"
+		"fstp	dword ptr [ebp+0x198]\n"
+		"fstp	dword ptr [ebp+0x194]\n"
+		"ret"
+	);
+#endif
 }
 
 static void* RadarBoundsCheckCoordBlip_JumpBack = AddressByVersion<void*>(0x4A55B8, 0x4A56A8, 0x4A5638);
 static void* RadarBoundsCheckCoordBlip_Count = AddressByVersion<void*>(0x4A55AF, 0x4A569F, 0x4A562F);
 __declspec(naked) void RadarBoundsCheckCoordBlip()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		mov		edx, RadarBoundsCheckCoordBlip_Count
@@ -357,11 +420,30 @@ __declspec(naked) void RadarBoundsCheckCoordBlip()
 		fcompp
 		ret
 	}
+#else
+	__asm__ volatile
+	(
+		"mov	edx, %[RadarBoundsCheckCoordBlip_Count]\n"
+		"cmp	cl, byte ptr [edx]\n"
+		"jnb	OutOfBounds\n"
+		"mov    edx, ecx\n"
+		"mov    eax, [esp+4]\n"
+		"jmp	%[RadarBoundsCheckCoordBlip_JumpBack]\n"
+
+"OutOfBounds:\n"
+		"or		eax, -1\n"
+		"fcompp\n"
+		"ret"
+		:: [RadarBoundsCheckCoordBlip_Count] "m" (RadarBoundsCheckCoordBlip_Count),
+		[RadarBoundsCheckCoordBlip_JumpBack] "m" (RadarBoundsCheckCoordBlip_JumpBack)
+	);
+#endif
 }
 
 static void* RadarBoundsCheckEntityBlip_JumpBack = AddressByVersion<void*>(0x4A565E, 0x4A574E, 0x4A56DE);
 __declspec(naked) void RadarBoundsCheckEntityBlip()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		mov		edx, RadarBoundsCheckCoordBlip_Count
@@ -375,6 +457,23 @@ __declspec(naked) void RadarBoundsCheckEntityBlip()
 		or		eax, -1
 		ret
 	}
+#else
+	__asm__ volatile
+	(
+		"mov	edx, %[RadarBoundsCheckCoordBlip_Count]\n"
+		"cmp	cl, byte ptr [edx]\n"
+		"jnb	OutOfBounds2\n"
+		"mov    edx, ecx\n"
+		"mov    eax, [esp+4]\n"
+		"jmp	%[RadarBoundsCheckEntityBlip_JumpBack]\n"
+
+		"OutOfBounds2:\n"
+		"or		eax, -1\n"
+		"ret"
+		:: [RadarBoundsCheckCoordBlip_Count] "m" (RadarBoundsCheckCoordBlip_Count),
+		[RadarBoundsCheckEntityBlip_JumpBack] "m" (RadarBoundsCheckEntityBlip_JumpBack)
+	);
+#endif
 }
 
 char** ppUserFilesDir = AddressByVersion<char**>(0x580C16, 0x580F66, 0x580E66);
@@ -413,6 +512,7 @@ unsigned int __cdecl AutoPilotTimerCalculation_III(unsigned int nTimer, int nSca
 
 __declspec(naked) void AutoPilotTimerFix_III()
 {
+#ifdef _MSC_VER
 	_asm
 	{
 		push    dword ptr [esp + 0x4]
@@ -427,6 +527,23 @@ __declspec(naked) void AutoPilotTimerFix_III()
 		pop     ebx
 		ret     4
 	}
+#else
+	__asm__ volatile
+	(
+		"push	dword ptr [esp + 0x4]\n"
+		"push	dword ptr [ebx + 0x10]\n"
+		"push	eax\n"
+		"call	%[AutoPilotTimerCalculation_III]\n"
+		"add	esp, 0xC\n"
+		"mov	[ebx + 0xC], eax\n"
+		"add	esp, 0x28\n"
+		"pop	ebp\n"
+		"pop	esi\n"
+		"pop	ebx\n"
+		"ret	4"
+		:: [AutoPilotTimerCalculation_III] "i" (AutoPilotTimerCalculation_III)
+	);
+#endif
 }
 
 namespace ZeroAmmoFix
@@ -581,6 +698,7 @@ namespace RemoveDriverStatusFix
 	{
 		// if (m_nStatus != STATUS_WRECKED)
 		//   m_nStatus = STATUS_ABANDONED;
+#ifdef _MSC_VER
 		_asm
 		{
 			mov		ah, [ecx+0x50]
@@ -594,6 +712,21 @@ namespace RemoveDriverStatusFix
 		DontSetStatus:
 			ret
 		}
+#else
+		__asm__ volatile
+		(
+			"mov	ah, [ecx+0x50]\n"
+			"mov	al, ah\n"
+			"and	ah, 0xF8\n"
+			"cmp	ah, 0x28\n"
+			"je		DontSetStatus\n"
+			"and    al, 7\n"
+			"or     al, 0x20\n"
+
+		"DontSetStatus:\n"
+			"ret"
+		);
+#endif
 	}
 }
 
@@ -626,6 +759,7 @@ namespace EvasiveDiveFix
 
 	__declspec(naked) static void CalculateAngle_Hook()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			push    dword ptr [esi+0x7C]
@@ -636,6 +770,19 @@ namespace EvasiveDiveFix
 			mov     ecx, ebp
 			ret
 		}
+#else
+		__asm__ volatile
+		(
+			"push	dword ptr [esi+0x7C]\n"
+			"push	dword ptr [esi+0x78]\n"
+			"call	%[CalculateAngle]\n"
+			"add	esp, 8\n"
+
+			"mov	ecx, ebp\n"
+			"ret"
+			:: [CalculateAngle] "i" (CalculateAngle)
+		);
+#endif
 	}
 }
 
@@ -648,27 +795,48 @@ namespace NullTerminatedLines
 	static void* orgSscanf_LoadPath;
 	__declspec(naked) static void sscanf1_LoadPath_Terminate()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			mov		eax, [esp+4]
 			mov		byte ptr [eax+ecx], 0
 			jmp		orgSscanf_LoadPath
 		}
+#else
+		__asm__ volatile
+		(
+			"mov	eax, [esp+4]\n"
+			"mov	byte ptr [eax+ecx], 0\n"
+			"jmp	%[orgSscanf_LoadPath]"
+			:: [orgSscanf_LoadPath] "m" (orgSscanf_LoadPath)
+		);
+#endif
 	}
 
 	static void* orgSscanf1;
 	__declspec(naked) static void sscanf1_Terminate()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			mov		eax, [esp+4]
 			mov		byte ptr [eax+ecx], 0
 			jmp		orgSscanf1
 		}
+#else
+		__asm__ volatile
+		(
+			"mov	eax, [esp+4]\n"
+			"mov	byte ptr [eax+ecx], 0\n"
+			"jmp	%[orgSscanf1]"
+			:: [orgSscanf1] "m" (orgSscanf1)
+		);
+#endif
 	}
 
 	__declspec(naked) static void ReadTrackFile_Terminate()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			mov		ecx, gString
@@ -678,6 +846,18 @@ namespace NullTerminatedLines
 			add     ecx, [esp+0xAC-0x98]
 			ret
 		}
+#else
+		__asm__ volatile
+		(
+			"mov	ecx, %[gString]\n"
+			"mov	byte ptr [ecx+edx], 0\n"
+			"mov	ecx, [esi]\n"
+			"inc	ebp\n"
+			"add	ecx, [esp+0xAC-0x98]\n"
+			"ret"
+			:: [gString] "m" (gString)
+		);
+#endif
 	}
 }
 
@@ -704,6 +884,7 @@ namespace DodoKeyboardControls
 	static void* (*orgFindPlayerVehicle)();
 	__declspec(naked) static void FindPlayerVehicle_DodoCheck()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			call	orgFindPlayerVehicle
@@ -715,6 +896,21 @@ namespace DodoKeyboardControls
 		CheatDisabled:
 			ret
 		}
+#else
+		__asm__ volatile
+		(
+			"call	%[orgFindPlayerVehicle]\n"
+			"mov	ecx, %[bAllDodosCheat]\n"
+			"cmp	byte ptr [ecx], 0\n"
+			"je		CheatDisabled\n"
+			"mov	byte ptr [esp+0x1C-0x14], 1\n"
+
+		"CheatDisabled:\n"
+			"ret"
+			:: [orgFindPlayerVehicle] "m" (orgFindPlayerVehicle),
+			[bAllDodosCheat] "m" (bAllDodosCheat)
+		);
+#endif
 	}
 }
 
@@ -771,6 +967,7 @@ namespace GenerateNewPickup_ReuseObjectFix
 
 	__declspec(naked) static void GiveUsAPickUpObject_CleanUpObject()
 	{
+#ifdef _MSC_VER
 		_asm
 		{
 			mov		eax, pPickupObject
@@ -796,6 +993,36 @@ namespace GenerateNewPickup_ReuseObjectFix
 		NoPickup:
 			jmp		orgGiveUsAPickUpObject
 		}
+#else
+		__asm__ volatile
+		(
+			"mov	eax, %[pPickupObject]\n"
+			"add	eax, ebp\n"
+			"mov	eax, [eax]\n"
+			"test	eax, eax\n"
+			"jz		NoPickup\n"
+			"push	edi\n"
+			"mov	edi, eax\n"
+
+			"push	edi\n"
+			"call	offset %[WorldRemove]\n"
+			"add	esp, 4\n"
+
+			// Call dtor
+			"mov	ecx, edi\n"
+			"mov	eax, [edi]\n"
+			"push	1\n"
+			"call	dword ptr [eax]\n"
+
+			"pop	edi\n"
+
+		"NoPickup:\n"
+			"jmp	%[orgGiveUsAPickUpObject]"
+			:: [pPickupObject] "m" (pPickupObject),
+			[WorldRemove] "m" (WorldRemove),
+			[orgGiveUsAPickUpObject] "m" (orgGiveUsAPickUpObject)
+		);
+#endif
 	}
 }