From e33db57f942d025a7d342208617722537b585d57 Mon Sep 17 00:00:00 2001
From: Crementif <26669564+Crementif@users.noreply.github.com>
Date: Thu, 17 Sep 2026 20:03:23 +0200
Subject: [PATCH] Latte: Use the Wii U overflow value for MOVA

The Wii U returns -256 when MOVA goes out of range.
Cemu clamped large positive values to 255 instead.
---
 .../Latte/LegacyShaderDecompiler/LatteDecompilerEmitGLSL.cpp  | 4 ++--
 .../Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitGLSL.cpp b/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitGLSL.cpp
index f7af1e4f..c3ed719d 100644
--- a/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitGLSL.cpp
+++ b/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitGLSL.cpp
@@ -1084,7 +1084,7 @@ void _emitALUOP2InstructionCode(LatteDecompilerShaderContext* shaderContext, Lat
 		_emitOperandInputCode(shaderContext, aluInstruction, 0, LATTE_DECOMPILER_DTYPE_FLOAT);
 		src->add(";" _CRLF);
 		src->add("tempResultf = floor(tempResultf);" _CRLF);
-		src->add("tempResultf = clamp(tempResultf, -256.0, 255.0);" _CRLF);
+		src->add("tempResultf = (tempResultf >= -256.0 && tempResultf <= 255.0) ? tempResultf : -256.0;" _CRLF);
 		// set AR
 		if( aluInstruction->destElem == 0 )
 			src->add("ARi.x = int(tempResultf);" _CRLF);
@@ -1109,7 +1109,7 @@ void _emitALUOP2InstructionCode(LatteDecompilerShaderContext* shaderContext, Lat
 		src->add("tempResulti = ");
 		_emitOperandInputCode(shaderContext, aluInstruction, 0, LATTE_DECOMPILER_DTYPE_SIGNED_INT);
 		src->add(";" _CRLF);
-		src->add("tempResulti = clamp(tempResulti, -256, 255);" _CRLF);
+		src->add("tempResulti = (tempResulti >= -256 && tempResulti <= 255) ? tempResulti : -256;" _CRLF);
 		// set AR
 		if( aluInstruction->destElem == 0 )
 			src->add("ARi.x = tempResulti;" _CRLF);
diff --git a/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp b/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp
index e265ebd1..9cc15641 100644
--- a/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp
+++ b/src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp
@@ -1018,7 +1018,7 @@ static void _emitALUOP2InstructionCode(LatteDecompilerShaderContext* shaderConte
 		_emitOperandInputCode(shaderContext, aluInstruction, 0, LATTE_DECOMPILER_DTYPE_FLOAT);
 		src->add(";" _CRLF);
 		src->add("tempResultf = floor(tempResultf);" _CRLF);
-		src->add("tempResultf = clamp(tempResultf, -256.0, 255.0);" _CRLF);
+		src->add("tempResultf = (tempResultf >= -256.0 && tempResultf <= 255.0) ? tempResultf : -256.0;" _CRLF);
 		// set AR
 		if( aluInstruction->destElem == 0 )
 			src->add("ARi.x = int(tempResultf);" _CRLF);
@@ -1043,7 +1043,7 @@ static void _emitALUOP2InstructionCode(LatteDecompilerShaderContext* shaderConte
 		src->add("tempResulti = ");
 		_emitOperandInputCode(shaderContext, aluInstruction, 0, LATTE_DECOMPILER_DTYPE_SIGNED_INT);
 		src->add(";" _CRLF);
-		src->add("tempResulti = clamp(tempResulti, -256, 255);" _CRLF);
+		src->add("tempResulti = (tempResulti >= -256 && tempResulti <= 255) ? tempResulti : -256;" _CRLF);
 		// set AR
 		if( aluInstruction->destElem == 0 )
 			src->add("ARi.x = tempResulti;" _CRLF);