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https://github.com/c64scene-ar/llvm-6502.git
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1a21909e98
This patch adds support for the z13 processor type and its vector facility, and adds MC support for all new instructions provided by that facilily. Apart from defining the new instructions, the main changes are: - Adding VR128, VR64 and VR32 register classes. - Making FP64 a subclass of VR64 and FP32 a subclass of VR32. - Adding a D(V,B) addressing mode for scatter/gather operations - Adding 1-, 2-, and 3-bit immediate operands for some 4-bit fields. Until now all immediate operands have been the same width as the underlying field (hence the assert->return change in decode[SU]ImmOperand). In addition, sys::getHostCPUName is extended to detect running natively on a z13 machine. Based on a patch by Richard Sandiford. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236520 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
//===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "SystemZSubtarget.h"
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#include "MCTargetDesc/SystemZMCTargetDesc.h"
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#include "llvm/IR/GlobalValue.h"
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using namespace llvm;
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#define DEBUG_TYPE "systemz-subtarget"
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#define GET_SUBTARGETINFO_TARGET_DESC
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#define GET_SUBTARGETINFO_CTOR
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#include "SystemZGenSubtargetInfo.inc"
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// Pin the vtable to this file.
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void SystemZSubtarget::anchor() {}
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SystemZSubtarget &
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SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
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std::string CPUName = CPU;
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if (CPUName.empty())
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CPUName = "generic";
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// Parse features string.
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ParseSubtargetFeatures(CPUName, FS);
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return *this;
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}
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SystemZSubtarget::SystemZSubtarget(const std::string &TT,
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const std::string &CPU,
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const std::string &FS,
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const TargetMachine &TM)
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: SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
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HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
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HasPopulationCount(false), HasFastSerialization(false),
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HasInterlockedAccess1(false), HasMiscellaneousExtensions(false),
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HasTransactionalExecution(false), HasProcessorAssist(false),
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HasVector(false),
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TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
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TLInfo(TM, *this), TSInfo(*TM.getDataLayout()), FrameLowering() {}
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// Return true if GV binds locally under reloc model RM.
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static bool bindsLocally(const GlobalValue *GV, Reloc::Model RM) {
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// For non-PIC, all symbols bind locally.
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if (RM == Reloc::Static)
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return true;
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return GV->hasLocalLinkage() || !GV->hasDefaultVisibility();
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}
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bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
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Reloc::Model RM,
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CodeModel::Model CM) const {
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// PC32DBL accesses require the low bit to be clear. Note that a zero
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// value selects the default alignment and is therefore OK.
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if (GV->getAlignment() == 1)
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return false;
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// For the small model, all locally-binding symbols are in range.
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if (CM == CodeModel::Small)
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return bindsLocally(GV, RM);
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// For Medium and above, assume that the symbol is not within the 4GB range.
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// Taking the address of locally-defined text would be OK, but that
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// case isn't easy to detect.
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return false;
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}
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