DXBC Debugger fix for CalculateLevelOfDetailUnclamped

Zorro666 · Zorro666 · commit e7f0b0ea67a5 · 2025-12-14T08:13:05.000+13:00
The LOD result has already been swizzed into result.x
diff --git a/renderdoc/driver/shaders/dxbc/dxbc_debug.cpp b/renderdoc/driver/shaders/dxbc/dxbc_debug.cpp
@@ -4181,7 +4181,8 @@ void ThreadState::StepNext(ShaderDebugState *state, DebugAPIWrapper *apiWrapper,
                                            op.str.c_str(), lookupResult))
       {
         // should be a better way of doing this
-        if(destOperand.comps[1] == 0xff)
+        // LOD result is already in result.x
+        if((destOperand.comps[1] == 0xff) && (op.operation != OPCODE_LOD))
           lookupResult.value.s32v[0] = lookupResult.value.s32v[destOperand.comps[0]];
 
         SetDst(state, destOperand, op, lookupResult);

Original file line number	Diff line number	Diff line change
`@@ -4181,7 +4181,8 @@ void ThreadState::StepNext(ShaderDebugState state, DebugAPIWrapper apiWrapper,`
`4181`	`4181`	`op.str.c_str(), lookupResult))`
`4182`	`4182`	`{`
`4183`	`4183`	`// should be a better way of doing this`
`4184`		`- if(destOperand.comps[1] == 0xff)`
	`4184`	`+ // LOD result is already in result.x`
	`4185`	`+ if((destOperand.comps[1] == 0xff) && (op.operation != OPCODE_LOD))`
`4185`	`4186`	`lookupResult.value.s32v[0] = lookupResult.value.s32v[destOperand.comps[0]];`
`4186`	`4187`
`4187`	`4188`	`SetDst(state, destOperand, op, lookupResult);`