x86 codegen source file skeletons
Add source files for x86 code generation. These are basically just
the MIPS versions with all bodies ifdef'd out and replaced with
UNIMPLEMENTED(WARNING).
There is also one real change in this CL related to the way the
assembler computes instruction size. We now set the initial
instruction size into the LIR during flag generation. For x86, this
size may be changed during assembly when we detect the ability to
substitute a general instruction for an equivalent one with a shorter
encoding.
NOTE: the new files are not yet ready for compilation. That will be
the next CL.
Change-Id: Id94fbeeb7c3e36ba4a8d93c3807351ea20c74133
diff --git a/src/compiler/codegen/x86/X86RallocUtil.cc b/src/compiler/codegen/x86/X86RallocUtil.cc
new file mode 100644
index 0000000..3073258
--- /dev/null
+++ b/src/compiler/codegen/x86/X86RallocUtil.cc
@@ -0,0 +1,226 @@
+/*
+ * 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 {
+
+/*
+ * TUNING: is leaf? Can't just use "hasInvoke" to determine as some
+ * instructions might call out to C/assembly helper functions. Until
+ * machinery is in place, always spill lr.
+ */
+
+void oatAdjustSpillMask(CompilationUnit* cUnit)
+{
+ UNIMPLEMENTED(WARNING) << "oatAdjustSpillMask";
+#if 0
+ cUnit->coreSpillMask |= (1 << r_RA);
+ cUnit->numCoreSpills++;
+#endif
+}
+
+/*
+ * 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).
+ */
+void oatMarkPreservedSingle(CompilationUnit* cUnit, int sReg, int reg)
+{
+ UNIMPLEMENTED(WARNING) << "oatMarkPreservedSingle";
+#if 0
+ LOG(FATAL) << "No support yet for promoted FP regs";
+#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)
+{
+ UNIMPLEMENTED(WARNING) << "oatClobberCalleeSave";
+#if 0
+ 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_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);
+#endif
+}
+
+extern RegLocation oatGetReturnWide(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_WIDE;
+ oatClobber(cUnit, res.lowReg);
+ oatClobber(cUnit, res.highReg);
+ oatMarkInUse(cUnit, res.lowReg);
+ oatMarkInUse(cUnit, res.highReg);
+ oatMarkPair(cUnit, res.lowReg, res.highReg);
+ return res;
+}
+
+extern RegLocation oatGetReturnWideAlt(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_WIDE_ALT;
+ oatClobber(cUnit, res.lowReg);
+ oatClobber(cUnit, res.highReg);
+ oatMarkInUse(cUnit, res.lowReg);
+ oatMarkInUse(cUnit, res.highReg);
+ oatMarkPair(cUnit, res.lowReg, res.highReg);
+ return res;
+}
+
+extern RegLocation oatGetReturn(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN;
+ oatClobber(cUnit, res.lowReg);
+ oatMarkInUse(cUnit, res.lowReg);
+ return res;
+}
+
+extern RegLocation oatGetReturnAlt(CompilationUnit* cUnit)
+{
+ RegLocation res = LOC_C_RETURN_ALT;
+ oatClobber(cUnit, res.lowReg);
+ oatMarkInUse(cUnit, res.lowReg);
+ 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)
+{
+ UNIMPLEMENTED(WARNING) << "oatLockCallTemps";
+#if 0
+ oatLockTemp(cUnit, rARG0);
+ oatLockTemp(cUnit, rARG1);
+ oatLockTemp(cUnit, rARG2);
+ oatLockTemp(cUnit, rARG3);
+#endif
+}
+
+/* To be used when explicitly managing register use */
+extern void oatFreeCallTemps(CompilationUnit* cUnit)
+{
+ UNIMPLEMENTED(WARNING) << "oatFreeCallTemps";
+#if 0
+ oatFreeTemp(cUnit, rARG0);
+ oatFreeTemp(cUnit, rARG1);
+ oatFreeTemp(cUnit, rARG2);
+ oatFreeTemp(cUnit, rARG3);
+#endif
+}
+
+/* Convert an instruction to a NOP */
+void oatNopLIR( LIR* lir)
+{
+ ((LIR*)lir)->flags.isNop = true;
+}
+
+} // namespace art