Port x64 backend to xbyak

src/backend_x64/hostloc.cpp

@@ -0,0 +1,35 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2016 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 "backend_x64/hostloc.h"
+
+namespace Dynarmic {
+namespace BackendX64 {
+
+Xbyak::Reg64 HostLocToReg64(HostLoc loc) {
+    DEBUG_ASSERT(HostLocIsGPR(loc));
+    DEBUG_ASSERT(loc != HostLoc::RSP);
+    DEBUG_ASSERT(loc != HostLoc::R15);
+    return Xbyak::Reg64(static_cast<int>(loc));
+}
+
+Xbyak::Xmm HostLocToXmm(HostLoc loc) {
+    DEBUG_ASSERT(HostLocIsXMM(loc));
+    return Xbyak::Xmm(static_cast<int>(loc) - static_cast<int>(HostLoc::XMM0));
+}
+
+Xbyak::Address SpillToOpArg(HostLoc loc) {
+    using namespace Xbyak::util;
+
+    static_assert(std::is_same<decltype(JitState{nullptr}.Spill[0]), u64&>::value, "Spill must be u64");
+    DEBUG_ASSERT(HostLocIsSpill(loc));
+
+    size_t i = static_cast<size_t>(loc) - static_cast<size_t>(HostLoc::FirstSpill);
+    return qword[r15 + offsetof(JitState, Spill) + i * sizeof(u64)];
+}
+
+} // namespace BackendX64
+} // namespace Dynarmic