2 files changed, 11 insertions, 6 deletions

diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index 82d912c76..203e7758c 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -1636,6 +1636,7 @@ public:
         ICMP_RC,
         ICMP_R,
         ICMP_CR,
+        ICMP_IMM,
         MUFU,  // Multi-Function Operator
         RRO_C, // Range Reduction Operator
         RRO_R,
@@ -1903,6 +1904,7 @@ private:
             INST("010100110100----", Id::ICMP_RC, Type::ArithmeticInteger, "ICMP_RC"),
             INST("010110110100----", Id::ICMP_R, Type::ArithmeticInteger, "ICMP_R"),
             INST("010010110100----", Id::ICMP_CR, Type::ArithmeticInteger, "ICMP_CR"),
+            INST("0011011-0100----", Id::ICMP_IMM, Type::ArithmeticInteger, "ICMP_IMM"),
             INST("0101101111011---", Id::LEA_R2, Type::ArithmeticInteger, "LEA_R2"),
             INST("0101101111010---", Id::LEA_R1, Type::ArithmeticInteger, "LEA_R1"),
             INST("001101101101----", Id::LEA_IMM, Type::ArithmeticInteger, "LEA_IMM"),
diff --git a/src/video_core/shader/decode/arithmetic_integer.cpp b/src/video_core/shader/decode/arithmetic_integer.cpp
index 1aa21010a..b73f6536e 100644
--- a/src/video_core/shader/decode/arithmetic_integer.cpp
+++ b/src/video_core/shader/decode/arithmetic_integer.cpp
@@ -140,11 +140,11 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
     }
     case OpCode::Id::ICMP_CR:
     case OpCode::Id::ICMP_R:
-    case OpCode::Id::ICMP_RC: {
-        UNIMPLEMENTED_IF(instr.icmp.is_signed != 0);
+    case OpCode::Id::ICMP_RC:
+    case OpCode::Id::ICMP_IMM: {
         const Node zero = Immediate(0);
 
-        const auto [op_a, op_b] = [&]() -> std::tuple<Node, Node> {
+        const auto [op_b, test] = [&]() -> std::pair<Node, Node> {
             switch (opcode->get().GetId()) {
             case OpCode::Id::ICMP_CR:
                 return {GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset),
@@ -154,13 +154,16 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
             case OpCode::Id::ICMP_RC:
                 return {GetRegister(instr.gpr39),
                         GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
+            case OpCode::Id::ICMP_IMM:
+                return {Immediate(instr.alu.GetSignedImm20_20()), GetRegister(instr.gpr39)};
             default:
-                UNIMPLEMENTED();
+                UNREACHABLE();
                 return {zero, zero};
             }
         }();
-        const Node test = GetRegister(instr.gpr8);
-        const Node comparison = GetPredicateComparisonInteger(instr.icmp.cond, false, test, zero);
+        const Node op_a = GetRegister(instr.gpr8);
+        const Node comparison =
+            GetPredicateComparisonInteger(instr.icmp.cond, instr.icmp.is_signed != 0, test, zero);
         SetRegister(bb, instr.gpr0, Operation(OperationCode::Select, comparison, op_a, op_b));
         break;
     }