Shader: execute RDNA2 FP64 shadow arithmetic and log denorm limits

Shader: disable FP64 denorm preservation controls for now

src/graphics/shader/recompiler/backend/spirv/SpirvEmitter.cpp

@@ -198,6 +198,7 @@ Emitter::SpirvRequirements Emitter::AnalyzeProgramRequirements(const IR::Program
 	SpirvRequirements requirements {};
 	for (const auto* block: program.blocks) {
 		for (const auto& inst: *block) {
+			requirements.float64 |= inst.GetType() == IR::Type::F64;
 			if (IR::BufferAccessOf(inst.GetOpcode()) == IR::BufferAccess::Atomic &&
 			    inst.GetType() == IR::Type::U64) {
 				requirements.buffer_int64_atomics = true;