shader_ir/decode: Reduce severity of unimplemented half-float FTZ

src/video_core/shader/decode/arithmetic_half.cpp

@@ -18,7 +18,9 @@ u32 ShaderIR::DecodeArithmeticHalf(NodeBlock& bb, u32 pc) {
 
     if (opcode->get().GetId() == OpCode::Id::HADD2_C ||
         opcode->get().GetId() == OpCode::Id::HADD2_R) {
-        UNIMPLEMENTED_IF(instr.alu_half.ftz != 0);
+        if (instr.alu_half.ftz != 0) {
+            LOG_WARNING(HW_GPU, "{} FTZ not implemented", opcode->get().GetName());
+        }
     }
     UNIMPLEMENTED_IF_MSG(instr.alu_half.saturate != 0, "Half float saturation not implemented");
 

src/video_core/shader/decode/arithmetic_half_immediate.cpp

@@ -17,7 +17,9 @@ u32 ShaderIR::DecodeArithmeticHalfImmediate(NodeBlock& bb, u32 pc) {
     const auto opcode = OpCode::Decode(instr);
 
     if (opcode->get().GetId() == OpCode::Id::HADD2_IMM) {
-        UNIMPLEMENTED_IF(instr.alu_half_imm.ftz != 0);
+        if (instr.alu_half_imm.ftz != 0) {
+            LOG_WARNING(HW_GPU, "{} FTZ not implemented", opcode->get().GetName());
+        }
     } else {
         UNIMPLEMENTED_IF(instr.alu_half_imm.precision != Tegra::Shader::HalfPrecision::None);
     }

src/video_core/shader/decode/half_set.cpp

@@ -18,7 +18,9 @@ u32 ShaderIR::DecodeHalfSet(NodeBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 
-    UNIMPLEMENTED_IF(instr.hset2.ftz != 0);
+    if (instr.hset2.ftz != 0) {
+        LOG_WARNING(HW_GPU, "{} FTZ not implemented", opcode->get().GetName());
+    }
 
     // instr.hset2.type_a
     // instr.hset2.type_b