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