diff --git a/src/shader_recompiler/frontend/translate/vector_alu.cpp b/src/shader_recompiler/frontend/translate/vector_alu.cpp
index 22020d59f..da25f5434 100644
--- a/src/shader_recompiler/frontend/translate/vector_alu.cpp
+++ b/src/shader_recompiler/frontend/translate/vector_alu.cpp
@@ -1010,8 +1010,10 @@ void Translator::V_CMP_CLASS_F32(const GcnInst& inst) {
             value = ir.FPIsNan(src0);
         } else if ((class_mask & IR::FloatClassFunc::Infinity) == IR::FloatClassFunc::Infinity) {
             value = ir.FPIsInf(src0);
+        } else if ((class_mask & IR::FloatClassFunc::Negative) == IR::FloatClassFunc::Negative) {
+            value = ir.FPLessThanEqual(src0, ir.Imm32(-0.f));
         } else {
-            UNREACHABLE();
+            UNREACHABLE_MSG("Unsupported float class mask: {:#x}", static_cast<u32>(class_mask));
         }
     } else {
         // We don't know the type yet, delay its resolution.
diff --git a/src/shader_recompiler/ir/reg.h b/src/shader_recompiler/ir/reg.h
index 40c4b61c3..622190cf0 100644
--- a/src/shader_recompiler/ir/reg.h
+++ b/src/shader_recompiler/ir/reg.h
@@ -25,6 +25,7 @@ enum class FloatClassFunc : u32 {
 
     NaN = SignalingNan | QuietNan,
     Infinity = PositiveInfinity | NegativeInfinity,
+    Negative = NegativeInfinity | NegativeNormal | NegativeDenorm | NegativeZero,
     Finite = NegativeNormal | NegativeDenorm | NegativeZero | PositiveNormal | PositiveDenorm |
              PositiveZero,
 };