From e9a0fec5b3f03c460a8945a6599c99374d6ea614 Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Mon, 5 Feb 2024 18:08:28 +0100
Subject: [PATCH] [dxso] Clamp Exp when fast float emulation is enabled

---
 src/dxso/dxso_compiler.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/dxso/dxso_compiler.cpp b/src/dxso/dxso_compiler.cpp
index 905a9513..abc55de8 100644
--- a/src/dxso/dxso_compiler.cpp
+++ b/src/dxso/dxso_compiler.cpp
@@ -2029,12 +2029,22 @@ namespace dxvk {
             result.id = resultIndices[0];
           else
             result.id = m_module.opCompositeConstruct(typeId, result.type.ccount, resultIndices.data());
+
+        if (m_moduleInfo.options.d3d9FloatEmulation == D3D9FloatEmulation::Enabled) {
+          result.id = m_module.opNMin(typeId, result.id,
+            m_module.constfReplicant(FLT_MAX, result.type.ccount));
+        }
           break;
         }
         [[fallthrough]];
       case DxsoOpcode::Exp:
         result.id = m_module.opExp2(typeId,
           emitRegisterLoad(src[0], mask).id);
+
+        if (m_moduleInfo.options.d3d9FloatEmulation == D3D9FloatEmulation::Enabled) {
+          result.id = m_module.opNMin(typeId, result.id,
+            m_module.constfReplicant(FLT_MAX, result.type.ccount));
+        }
         break;
       case DxsoOpcode::Pow: {
         uint32_t base = emitRegisterLoad(src[0], mask).id;