diff --git a/src/shader_recompiler/frontend/translate/vector_alu.cpp b/src/shader_recompiler/frontend/translate/vector_alu.cpp
index d57fe57bf..0d4156ee1 100644
--- a/src/shader_recompiler/frontend/translate/vector_alu.cpp
+++ b/src/shader_recompiler/frontend/translate/vector_alu.cpp
@@ -1160,7 +1160,8 @@ void Translator::V_CMP_U64(ConditionOp op, bool is_signed, bool set_exec, const
         case OperandField::SignedConstIntPos:
             return ir.Imm64(static_cast<u64>(inst.src[0].code));
         case OperandField::SignedConstIntNeg:
-            return ir.Imm64(static_cast<u64>(-s32(inst.src[0].code)));
+            s32 decoded_value = -s32(inst.src[0].code) + SignedConstIntNegMin - 1;
+            return ir.Imm64(static_cast<u64>(decoded_value));
         default:
             UNREACHABLE_MSG("src0 = {}", u32(inst.src[0].field));
         }
@@ -1189,7 +1190,8 @@ void Translator::V_CMP_U64(ConditionOp op, bool is_signed, bool set_exec, const
         case OperandField::SignedConstIntPos:
             return ir.Imm64(static_cast<u64>(inst.src[1].code));
         case OperandField::SignedConstIntNeg:
-            return ir.Imm64(static_cast<u64>(-s32(inst.src[1].code)));
+            s32 decoded_value = -s32(inst.src[0].code) + SignedConstIntNegMin - 1;
+            return ir.Imm64(static_cast<u64>(decoded_value));
         default:
             UNREACHABLE_MSG("Unsupported src[1] operand field: {}", u32(inst.src[1].field));
         }