A64: Implement branch

src/frontend/A64/translate/impl/branch.cpp

@@ -0,0 +1,42 @@
+/* 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 "frontend/A64/translate/impl/impl.h"
+
+namespace Dynarmic {
+namespace A64 {
+
+bool TranslatorVisitor::B_cond(Imm<19> imm19, Cond cond) {
+    s64 offset = concatenate(imm19, Imm<2>{0}).SignExtend<s64>();
+
+    u64 target = ir.PC() + offset;
+    auto cond_pass = IR::Term::LinkBlock{ir.current_location.SetPC(target)};
+    auto cond_fail = IR::Term::LinkBlock{ir.current_location.AdvancePC(4)};
+    ir.SetTerm(IR::Term::If{cond, cond_pass, cond_fail});
+    return false;
+}
+
+bool TranslatorVisitor::B_uncond(Imm<26> imm26) {
+    s64 offset = concatenate(imm26, Imm<2>{0}).SignExtend<s64>();
+
+    u64 target = ir.PC() + offset;
+    ir.SetTerm(IR::Term::LinkBlock{ir.current_location.SetPC(target)});
+    return false;
+}
+
+bool TranslatorVisitor::BL(Imm<26> imm26) {
+    s64 offset = concatenate(imm26, Imm<2>{0}).SignExtend<s64>();
+
+    X(64, Reg::R30, ir.Imm64(ir.PC() + 4));
+    ir.PushRSB(ir.current_location.AdvancePC(4));
+
+    u64 target = ir.PC() + offset;
+    ir.SetTerm(IR::Term::LinkBlock{ir.current_location.SetPC(target)});
+    return false;
+}
+
+} // namespace A64
+} // namespace Dynarmic