ART: Mips64 runtime support
Interpret-only Mips64 runtime support.
Change-Id: Iee22d0c8c77105d9b2f03a67dc4e09957fe0ab0a
diff --git a/runtime/arch/mips64/context_mips64.cc b/runtime/arch/mips64/context_mips64.cc
new file mode 100644
index 0000000..7523ade
--- /dev/null
+++ b/runtime/arch/mips64/context_mips64.cc
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "context_mips64.h"
+
+#include "mirror/art_method-inl.h"
+#include "quick/quick_method_frame_info.h"
+#include "util.h"
+
+namespace art {
+namespace mips64 {
+
+static constexpr uintptr_t gZero = 0;
+
+void Mips64Context::Reset() {
+ for (size_t i = 0; i < kNumberOfGpuRegisters; i++) {
+ gprs_[i] = nullptr;
+ }
+ for (size_t i = 0; i < kNumberOfFpuRegisters; i++) {
+ fprs_[i] = nullptr;
+ }
+ gprs_[SP] = &sp_;
+ gprs_[RA] = &ra_;
+ // Initialize registers with easy to spot debug values.
+ sp_ = Mips64Context::kBadGprBase + SP;
+ ra_ = Mips64Context::kBadGprBase + RA;
+}
+
+void Mips64Context::FillCalleeSaves(const StackVisitor& fr) {
+ mirror::ArtMethod* method = fr.GetMethod();
+ const QuickMethodFrameInfo frame_info = method->GetQuickFrameInfo();
+ size_t spill_count = POPCOUNT(frame_info.CoreSpillMask());
+ size_t fp_spill_count = POPCOUNT(frame_info.FpSpillMask());
+ if (spill_count > 0) {
+ // Lowest number spill is farthest away, walk registers and fill into context.
+ int j = 1;
+ for (size_t i = 0; i < kNumberOfGpuRegisters; i++) {
+ if (((frame_info.CoreSpillMask() >> i) & 1) != 0) {
+ gprs_[i] = fr.CalleeSaveAddress(spill_count - j, frame_info.FrameSizeInBytes());
+ j++;
+ }
+ }
+ }
+ if (fp_spill_count > 0) {
+ // Lowest number spill is farthest away, walk registers and fill into context.
+ int j = 1;
+ for (size_t i = 0; i < kNumberOfFpuRegisters; i++) {
+ if (((frame_info.FpSpillMask() >> i) & 1) != 0) {
+ fprs_[i] = fr.CalleeSaveAddress(spill_count + fp_spill_count - j,
+ frame_info.FrameSizeInBytes());
+ j++;
+ }
+ }
+ }
+}
+
+bool Mips64Context::SetGPR(uint32_t reg, uintptr_t value) {
+ CHECK_LT(reg, static_cast<uint32_t>(kNumberOfGpuRegisters));
+ CHECK_NE(gprs_[reg], &gZero); // Can't overwrite this static value since they are never reset.
+ if (gprs_[reg] != nullptr) {
+ *gprs_[reg] = value;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+bool Mips64Context::SetFPR(uint32_t reg, uintptr_t value) {
+ CHECK_LT(reg, static_cast<uint32_t>(kNumberOfFpuRegisters));
+ CHECK_NE(fprs_[reg], &gZero); // Can't overwrite this static value since they are never reset.
+ if (fprs_[reg] != nullptr) {
+ *fprs_[reg] = value;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+void Mips64Context::SmashCallerSaves() {
+ // This needs to be 0 because we want a null/zero return value.
+ gprs_[V0] = const_cast<uintptr_t*>(&gZero);
+ gprs_[V1] = const_cast<uintptr_t*>(&gZero);
+ gprs_[A1] = nullptr;
+ gprs_[A0] = nullptr;
+ gprs_[A2] = nullptr;
+ gprs_[A3] = nullptr;
+ gprs_[A4] = nullptr;
+ gprs_[A5] = nullptr;
+ gprs_[A6] = nullptr;
+ gprs_[A7] = nullptr;
+
+ // f0-f23 are caller-saved; f24-f31 are callee-saved.
+ fprs_[F0] = nullptr;
+ fprs_[F1] = nullptr;
+ fprs_[F2] = nullptr;
+ fprs_[F3] = nullptr;
+ fprs_[F4] = nullptr;
+ fprs_[F5] = nullptr;
+ fprs_[F6] = nullptr;
+ fprs_[F7] = nullptr;
+ fprs_[F8] = nullptr;
+ fprs_[F9] = nullptr;
+ fprs_[F10] = nullptr;
+ fprs_[F11] = nullptr;
+ fprs_[F12] = nullptr;
+ fprs_[F13] = nullptr;
+ fprs_[F14] = nullptr;
+ fprs_[F15] = nullptr;
+ fprs_[F16] = nullptr;
+ fprs_[F17] = nullptr;
+ fprs_[F18] = nullptr;
+ fprs_[F19] = nullptr;
+ fprs_[F20] = nullptr;
+ fprs_[F21] = nullptr;
+ fprs_[F22] = nullptr;
+ fprs_[F23] = nullptr;
+}
+
+extern "C" void art_quick_do_long_jump(uintptr_t*, uintptr_t*);
+
+void Mips64Context::DoLongJump() {
+ uintptr_t gprs[kNumberOfGpuRegisters];
+ uintptr_t fprs[kNumberOfFpuRegisters];
+ for (size_t i = 0; i < kNumberOfGpuRegisters; ++i) {
+ gprs[i] = gprs_[i] != nullptr ? *gprs_[i] : Mips64Context::kBadGprBase + i;
+ }
+ for (size_t i = 0; i < kNumberOfFpuRegisters; ++i) {
+ fprs[i] = fprs_[i] != nullptr ? *fprs_[i] : Mips64Context::kBadFprBase + i;
+ }
+ art_quick_do_long_jump(gprs, fprs);
+}
+
+} // namespace mips64
+} // namespace art