Multi-target support
This CL represents a step towards splitting out the target dependent
and target independent portions of the compiler, and also adds in the
beginning of a MIPS compiler based on the MIPS AOSP Jit submission.
More polish is clearly needed, but the split is here probably pretty
close. The MIPS code will not compile at this point (and there is no
makefile target at present), but it's pretty close.
There should be no changes in functionality of the Arm compiler in this
CL - just moved stuff around.
Change-Id: Ia66b2847e22644a1ec63e66bf5f2fee722f963d4
diff --git a/src/compiler/codegen/mips/MipsRallocUtil.cc b/src/compiler/codegen/mips/MipsRallocUtil.cc
new file mode 100644
index 0000000..a243415
--- /dev/null
+++ b/src/compiler/codegen/mips/MipsRallocUtil.cc
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+/*
+ * This file contains Mips-specific register allocation support.
+ */
+
+#include "../../CompilerUtility.h"
+#include "../../CompilerIR.h"
+#include "../..//Dataflow.h"
+#include "MipsLIR.h"
+#include "Codegen.h"
+#include "../Ralloc.h"
+
+namespace art {
+
+/*
+ * Mark a callee-save fp register as promoted. Note that
+ * vpush/vpop uses contiguous register lists so we must
+ * include any holes in the mask. Associate holes with
+ * Dalvik register INVALID_VREG (0xFFFFU).
+ */
+STATIC void markPreservedSingle(CompilationUnit* cUnit, int sReg, int reg)
+{
+ UNIMPLEMENTED(FATAL) << "No support yet for promoted FP regs";
+#if 0
+ DCHECK_GE(reg, FP_REG_MASK + FP_CALLEE_SAVE_BASE);
+ reg = (reg & FP_REG_MASK) - FP_CALLEE_SAVE_BASE;
+ // Ensure fpVmapTable is large enough
+ int tableSize = cUnit->fpVmapTable.size();
+ for (int i = tableSize; i < (reg + 1); i++) {
+ cUnit->fpVmapTable.push_back(INVALID_VREG);
+ }
+ // Add the current mapping
+ cUnit->fpVmapTable[reg] = sReg;
+ // Size of fpVmapTable is high-water mark, use to set mask
+ cUnit->numFPSpills = cUnit->fpVmapTable.size();
+ cUnit->fpSpillMask = ((1 << cUnit->numFPSpills) - 1) << FP_CALLEE_SAVE_BASE;
+#endif
+}
+
+void oatFlushRegWide(CompilationUnit* cUnit, int reg1, int reg2)
+{
+ RegisterInfo* info1 = oatGetRegInfo(cUnit, reg1);
+ RegisterInfo* info2 = oatGetRegInfo(cUnit, reg2);
+ DCHECK(info1 && info2 && info1->pair && info2->pair &&
+ (info1->partner == info2->reg) &&
+ (info2->partner == info1->reg));
+ if ((info1->live && info1->dirty) || (info2->live && info2->dirty)) {
+ if (!(info1->isTemp && info2->isTemp)) {
+ /* Should not happen. If it does, there's a problem in evalLoc */
+ LOG(FATAL) << "Long half-temp, half-promoted";
+ }
+
+ info1->dirty = false;
+ info2->dirty = false;
+ if (oatS2VReg(cUnit, info2->sReg) <
+ oatS2VReg(cUnit, info1->sReg))
+ info1 = info2;
+ int vReg = oatS2VReg(cUnit, info1->sReg);
+ oatFlushRegWideImpl(cUnit, rSP,
+ oatVRegOffset(cUnit, vReg),
+ info1->reg, info1->partner);
+ }
+}
+
+void oatFlushReg(CompilationUnit* cUnit, int reg)
+{
+ RegisterInfo* info = oatGetRegInfo(cUnit, reg);
+ if (info->live && info->dirty) {
+ info->dirty = false;
+ int vReg = oatS2VReg(cUnit, info->sReg);
+ oatFlushRegImpl(cUnit, rSP,
+ oatVRegOffset(cUnit, vReg),
+ reg, kWord);
+ }
+}
+
+/* Give access to the target-dependent FP register encoding to common code */
+bool oatIsFpReg(int reg) {
+ return FPREG(reg);
+}
+
+uint32_t oatFpRegMask() {
+ return FP_REG_MASK;
+}
+
+/* Clobber all regs that might be used by an external C call */
+extern void oatClobberCalleeSave(CompilationUnit *cUnit)
+{
+ oatClobber(cUnit, r_ZERO);
+ oatClobber(cUnit, r_AT);
+ oatClobber(cUnit, r_V0);
+ oatClobber(cUnit, r_V1);
+ oatClobber(cUnit, r_A0);
+ oatClobber(cUnit, r_A1);
+ oatClobber(cUnit, r_A2);
+ oatClobber(cUnit, r_A3);
+ oatClobber(cUnit, r_T0);
+ oatClobber(cUnit, r_T1);
+ oatClobber(cUnit, r_T2);
+ oatClobber(cUnit, r_T3);
+ oatClobber(cUnit, r_T4);
+ oatClobber(cUnit, r_T5);
+ oatClobber(cUnit, r_T6);
+ oatClobber(cUnit, r_T7);
+ oatClobber(cUnit, r_T8);
+ oatClobber(cUnit, r_T9);
+ oatClobber(cUnit, r_K0);
+ oatClobber(cUnit, r_K1);
+ oatClobber(cUnit, r_GP);
+ oatClobber(cUnit, r_FP);
+ oatClobber(cUnit, r_RA);
+ oatClobber(cUnit, r_HI);
+ oatClobber(cUnit, r_LO);
+ oatClobber(cUnit, r_F0);
+ oatClobber(cUnit, r_F1);
+ oatClobber(cUnit, r_F2);
+ oatClobber(cUnit, r_F3);
+ oatClobber(cUnit, r_F4);
+ oatClobber(cUnit, r_F5);
+ oatClobber(cUnit, r_F6);
+ oatClobber(cUnit, r_F7);
+ oatClobber(cUnit, r_F8);
+ oatClobber(cUnit, r_F9);
+ oatClobber(cUnit, r_F10);
+ oatClobber(cUnit, r_F11);
+ oatClobber(cUnit, r_F12);
+ oatClobber(cUnit, r_F13);
+ oatClobber(cUnit, r_F14);
+ oatClobber(cUnit, r_F15);
+}
+
+extern RegLocation oatGetReturnWide(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_WIDE;
+ oatClobber(cUnit, r_V0);
+ oatClobber(cUnit, r_V1);
+ oatMarkInUse(cUnit, r_V0);
+ oatMarkInUse(cUnit, r_V1);
+ oatMarkPair(cUnit, res.lowReg, res.highReg);
+ return res;
+}
+
+extern RegLocation oatGetReturnWideAlt(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_WIDE_ALT;
+ oatClobber(cUnit, r_F0);
+ oatClobber(cUnit, r_F1);
+ oatMarkInUse(cUnit, r_F0);
+ oatMarkInUse(cUnit, r_F1);
+ oatMarkPair(cUnit, res.lowReg, res.highReg);
+ return res;
+}
+
+extern RegLocation oatGetReturn(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN;
+ oatClobber(cUnit, r_V0);
+ oatMarkInUse(cUnit, r_V0);
+ return res;
+}
+
+extern RegLocation oatGetReturnAlt(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_ALT;
+ oatClobber(cUnit, r_F0);
+ oatMarkInUse(cUnit, r_F0);
+ return res;
+}
+
+extern RegisterInfo* oatGetRegInfo(CompilationUnit* cUnit, int reg)
+{
+ return FPREG(reg) ? &cUnit->regPool->FPRegs[reg & FP_REG_MASK]
+ : &cUnit->regPool->coreRegs[reg];
+}
+
+/* To be used when explicitly managing register use */
+extern void oatLockCallTemps(CompilationUnit* cUnit)
+{
+ oatLockTemp(cUnit, r_A0);
+ oatLockTemp(cUnit, r_A1);
+ oatLockTemp(cUnit, r_A2);
+ oatLockTemp(cUnit, r_A3);
+}
+
+/* To be used when explicitly managing register use */
+extern void oatFreeCallTemps(CompilationUnit* cUnit)
+{
+ oatFreeTemp(cUnit, r_A0);
+ oatFreeTemp(cUnit, r_A1);
+ oatFreeTemp(cUnit, r_A2);
+ oatFreeTemp(cUnit, r_A3);
+}
+
+} // namespace art