1//===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the SPARC specific subclass of TargetSubtargetInfo. 11// 12//===----------------------------------------------------------------------===// 13 14#include "SparcSubtarget.h" 15#include "Sparc.h" 16#include "llvm/Support/MathExtras.h" 17#include "llvm/Support/TargetRegistry.h" 18 19using namespace llvm; 20 21#define DEBUG_TYPE "sparc-subtarget" 22 23#define GET_SUBTARGETINFO_TARGET_DESC 24#define GET_SUBTARGETINFO_CTOR 25#include "SparcGenSubtargetInfo.inc" 26 27void SparcSubtarget::anchor() { } 28 29SparcSubtarget &SparcSubtarget::initializeSubtargetDependencies(StringRef CPU, 30 StringRef FS) { 31 IsV9 = false; 32 IsLeon = false; 33 V8DeprecatedInsts = false; 34 IsVIS = false; 35 HasHardQuad = false; 36 UsePopc = false; 37 UseSoftFloat = false; 38 39 // Leon features 40 HasLeonCasa = false; 41 HasUmacSmac = false; 42 PerformSDIVReplace = false; 43 FixCallImmediates = false; 44 IgnoreZeroFlag = false; 45 InsertNOPDoublePrecision = false; 46 FixFSMULD = false; 47 ReplaceFMULS = false; 48 PreventRoundChange = false; 49 FixAllFDIVSQRT = false; 50 InsertNOPLoad = false; 51 FlushCacheLineSWAP = false; 52 InsertNOPsLoadStore = false; 53 54 // Determine default and user specified characteristics 55 std::string CPUName = CPU; 56 if (CPUName.empty()) 57 CPUName = (Is64Bit) ? "v9" : "v8"; 58 59 // Parse features string. 60 ParseSubtargetFeatures(CPUName, FS); 61 62 // Popc is a v9-only instruction. 63 if (!IsV9) 64 UsePopc = false; 65 66 return *this; 67} 68 69SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU, 70 const std::string &FS, const TargetMachine &TM, 71 bool is64Bit) 72 : SparcGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT), Is64Bit(is64Bit), 73 InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this), 74 FrameLowering(*this) {} 75 76int SparcSubtarget::getAdjustedFrameSize(int frameSize) const { 77 78 if (is64Bit()) { 79 // All 64-bit stack frames must be 16-byte aligned, and must reserve space 80 // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128. 81 frameSize += 128; 82 // Frames with calls must also reserve space for 6 outgoing arguments 83 // whether they are used or not. LowerCall_64 takes care of that. 84 frameSize = alignTo(frameSize, 16); 85 } else { 86 // Emit the correct save instruction based on the number of bytes in 87 // the frame. Minimum stack frame size according to V8 ABI is: 88 // 16 words for register window spill 89 // 1 word for address of returned aggregate-value 90 // + 6 words for passing parameters on the stack 91 // ---------- 92 // 23 words * 4 bytes per word = 92 bytes 93 frameSize += 92; 94 95 // Round up to next doubleword boundary -- a double-word boundary 96 // is required by the ABI. 97 frameSize = alignTo(frameSize, 8); 98 } 99 return frameSize; 100} 101 102bool SparcSubtarget::enableMachineScheduler() const { 103 return true; 104} 105