From f9af788554db0d246627c3b2f2b0d0bea6b9b128 Mon Sep 17 00:00:00 2001
From: xbzk <xbzk@eden-emu.dev>
Date: Mon, 25 May 2026 17:26:24 -0300
Subject: [PATCH] [shader_env] add termination detection for MESA nv50_ir like
 homebrews

---
 src/video_core/shader_environment.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/video_core/shader_environment.cpp b/src/video_core/shader_environment.cpp
index 5f5633d4d1..0f22f49620 100644
--- a/src/video_core/shader_environment.cpp
+++ b/src/video_core/shader_environment.cpp
@@ -254,6 +254,9 @@ std::optional<u64> GenericEnvironment::TryFindSize() {
     static constexpr u64 SELF_BRANCH_A = 0xE2400FFFFF87000FULL;
     static constexpr u64 SELF_BRANCH_B = 0xE2400FFFFF07000FULL;
 
+    static constexpr u64 MESA_EXIT_MASK = 0xFFF00000000F001FULL;
+    static constexpr u64 MESA_EXIT_VALUE = (0xE30ULL << 52) | (0x7ULL << 16) | 0xFULL;
+
     GPUVAddr guest_addr{program_base + start_address};
     size_t offset{0};
     size_t size{BLOCK_SIZE};
@@ -266,6 +269,9 @@ std::optional<u64> GenericEnvironment::TryFindSize() {
             if (inst == SELF_BRANCH_A || inst == SELF_BRANCH_B) {
                 return offset + index;
             }
+            if ((inst & MESA_EXIT_MASK) == MESA_EXIT_VALUE) {
+                return offset + index + INST_SIZE;
+            }
         }
         guest_addr += BLOCK_SIZE;
         size += BLOCK_SIZE;