Implement DC instructions

src/ir_opt/a64_callback_config_pass.cpp

@@ -0,0 +1,59 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#include <array>
+
+#include "dynarmic/A64/config.h"
+#include "frontend/A64/ir_emitter.h"
+#include "frontend/ir/basic_block.h"
+#include "frontend/ir/microinstruction.h"
+#include "frontend/ir/opcodes.h"
+#include "ir_opt/passes.h"
+
+namespace Dynarmic::Optimization {
+
+void A64CallbackConfigPass(IR::Block& block, const A64::UserConfig& conf) {
+    if (conf.hook_data_cache_operations) {
+        return;
+    }
+
+    for (auto& inst : block) {
+        if (inst.GetOpcode() != IR::Opcode::A64DataCacheOperationRaised) {
+            continue;
+        }
+
+        auto op = static_cast<A64::DataCacheOperation>(inst.GetArg(0).GetU64());
+        if (op == A64::DataCacheOperation::ZeroByVA) {
+            A64::IREmitter ir{block};
+            ir.SetInsertionPoint(&inst);
+
+            size_t bytes = 4 << static_cast<size_t>(conf.dczid_el0 & 0b1111);
+            IR::U64 addr{inst.GetArg(1)};
+
+            const IR::U128 zero_u128 = ir.ZeroExtendToQuad(ir.Imm64(0));
+            while (bytes >= 16) {
+                ir.WriteMemory128(addr, zero_u128);
+                addr = ir.Add(addr, ir.Imm64(16));
+                bytes -= 16;
+            }
+
+            while (bytes >= 8) {
+                ir.WriteMemory64(addr, ir.Imm64(0));
+                addr = ir.Add(addr, ir.Imm64(8));
+                bytes -= 8;
+            }
+
+            while (bytes >= 4) {
+                ir.WriteMemory32(addr, ir.Imm32(0));
+                addr = ir.Add(addr, ir.Imm64(4));
+                bytes -= 4;
+            }
+        }
+        inst.Invalidate();
+    }
+}
+
+} // namespace Dynarmic::Optimization