From d02afcd668539e4ebac01c11046672d6e3ed7268 Mon Sep 17 00:00:00 2001
From: RadWolfie <RadWolfie@users.noreply.github.com>
Date: Tue, 22 Jul 2025 21:28:40 -0500
Subject: [PATCH] d3d8ltcg: add D3DDevice_RunPushBuffer_4__LTCG_eax2 patch

---
 src/core/hle/D3D8/Direct3D9/Direct3D9.cpp | 39 +++++++++++++++++++++++
 src/core/hle/D3D8/Direct3D9/Direct3D9.h   |  8 +++++
 src/core/hle/Patches.cpp                  |  1 +
 3 files changed, 48 insertions(+)

diff --git a/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp b/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
index d3923c645..ea7eb36bf 100644
--- a/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
+++ b/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
@@ -4822,6 +4822,45 @@ xbox::void_xt WINAPI xbox::EMUPATCH(D3DDevice_RunPushBuffer)
 	EmuExecutePushBuffer(pPushBuffer, pFixup);    
 }
 
+// ******************************************************************
+// * patch: D3DDevice_RunPushBuffer_4__LTCG_eax2
+// ******************************************************************
+// Overload for logging
+static void D3DDevice_RunPushBuffer_4__LTCG_eax2
+(
+    xbox::X_D3DPushBuffer       *pPushBuffer,
+	xbox::X_D3DFixup            *pFixup
+)
+{
+	LOG_FUNC_BEGIN
+		LOG_FUNC_ARG(pPushBuffer)
+		LOG_FUNC_ARG(pFixup)
+		LOG_FUNC_END;
+}
+
+// This uses a custom calling convention where parameter is passed in EAX
+__declspec(naked) xbox::void_xt WINAPI xbox::EMUPATCH(D3DDevice_RunPushBuffer_4__LTCG_eax2)
+(
+    X_D3DPushBuffer *pPushBuffer
+)
+{
+	X_D3DFixup* pFixup;
+	__asm {
+		LTCG_PROLOGUE
+		mov  pFixup, eax
+	}
+
+	// Log
+	D3DDevice_RunPushBuffer_4__LTCG_eax2(pPushBuffer, pFixup);
+
+	EmuExecutePushBuffer(pPushBuffer, pFixup);
+
+	__asm {
+		LTCG_EPILOGUE
+		ret  4
+	}
+}
+
 // ******************************************************************
 // * patch: D3DDevice_Clear
 // ******************************************************************
diff --git a/src/core/hle/D3D8/Direct3D9/Direct3D9.h b/src/core/hle/D3D8/Direct3D9/Direct3D9.h
index 8c2fbe113..9c7979a5c 100644
--- a/src/core/hle/D3D8/Direct3D9/Direct3D9.h
+++ b/src/core/hle/D3D8/Direct3D9/Direct3D9.h
@@ -736,6 +736,14 @@ xbox::void_xt WINAPI EMUPATCH(D3DDevice_RunPushBuffer)
     X_D3DFixup            *pFixup
 );
 
+// ******************************************************************
+// * patch: D3DDevice_RunPushBuffer_4__LTCG_eax2
+// ******************************************************************
+xbox::void_xt WINAPI EMUPATCH(D3DDevice_RunPushBuffer_4__LTCG_eax2)
+(
+    X_D3DPushBuffer *pPushBuffer
+);
+
 // ******************************************************************
 // * patch: D3DDevice_Clear
 // ******************************************************************
diff --git a/src/core/hle/Patches.cpp b/src/core/hle/Patches.cpp
index 6f634cff2..17d114428 100644
--- a/src/core/hle/Patches.cpp
+++ b/src/core/hle/Patches.cpp
@@ -128,6 +128,7 @@ std::map<const std::string, const xbox_patch_t> g_PatchTable = {
 	PATCH_ENTRY("D3DDevice_Reset_0__LTCG_edi1", xbox::EMUPATCH(D3DDevice_Reset_0__LTCG_edi1), PATCH_HLE_D3D),
 	PATCH_ENTRY("D3DDevice_Reset_0__LTCG_ebx1", xbox::EMUPATCH(D3DDevice_Reset_0__LTCG_ebx1), PATCH_HLE_D3D),
 	PATCH_ENTRY("D3DDevice_RunPushBuffer", xbox::EMUPATCH(D3DDevice_RunPushBuffer), PATCH_HLE_D3D),
+	PATCH_ENTRY("D3DDevice_RunPushBuffer_4__LTCG_eax2", xbox::EMUPATCH(D3DDevice_RunPushBuffer_4__LTCG_eax2), PATCH_HLE_D3D),
 	PATCH_ENTRY("D3DDevice_RunVertexStateShader", xbox::EMUPATCH(D3DDevice_RunVertexStateShader), PATCH_HLE_D3D),
 	PATCH_ENTRY("D3DDevice_RunVertexStateShader_4__LTCG_esi2", xbox::EMUPATCH(D3DDevice_RunVertexStateShader_4__LTCG_esi2), PATCH_HLE_D3D),
 	PATCH_ENTRY("D3DDevice_SelectVertexShader", xbox::EMUPATCH(D3DDevice_SelectVertexShader), PATCH_HLE_D3D),