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
19 using 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
anchor()27 void SparcSubtarget::anchor() { }
28
initializeSubtargetDependencies(StringRef CPU,StringRef FS)29 SparcSubtarget &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
SparcSubtarget(const Triple & TT,const std::string & CPU,const std::string & FS,const TargetMachine & TM,bool is64Bit)69 SparcSubtarget::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
getAdjustedFrameSize(int frameSize) const76 int 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
enableMachineScheduler() const102 bool SparcSubtarget::enableMachineScheduler() const {
103 return true;
104 }
105