1 //===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the SPARC specific subclass of TargetSubtargetInfo.
12 //===----------------------------------------------------------------------===//
14 #include "SparcSubtarget.h"
16 #include "llvm/Support/MathExtras.h"
17 #include "llvm/Support/TargetRegistry.h"
21 #define DEBUG_TYPE "sparc-subtarget"
23 #define GET_SUBTARGETINFO_TARGET_DESC
24 #define GET_SUBTARGETINFO_CTOR
25 #include "SparcGenSubtargetInfo.inc"
27 void SparcSubtarget::anchor() { }
29 SparcSubtarget &SparcSubtarget::initializeSubtargetDependencies(StringRef CPU,
31 UseSoftMulDiv = false;
34 V8DeprecatedInsts = false;
43 PerformSDIVReplace = false;
44 InsertNOPLoad = false;
47 FixAllFDIVSQRT = false;
48 DetectRoundChange = false;
50 // Determine default and user specified characteristics
51 std::string CPUName = CPU;
53 CPUName = (Is64Bit) ? "v9" : "v8";
55 // Parse features string.
56 ParseSubtargetFeatures(CPUName, FS);
58 // Popc is a v9-only instruction.
65 SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU,
66 const std::string &FS, const TargetMachine &TM,
68 : SparcGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT), Is64Bit(is64Bit),
69 InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
70 FrameLowering(*this) {}
72 int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
75 // All 64-bit stack frames must be 16-byte aligned, and must reserve space
76 // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
78 // Frames with calls must also reserve space for 6 outgoing arguments
79 // whether they are used or not. LowerCall_64 takes care of that.
80 frameSize = alignTo(frameSize, 16);
82 // Emit the correct save instruction based on the number of bytes in
83 // the frame. Minimum stack frame size according to V8 ABI is:
84 // 16 words for register window spill
85 // 1 word for address of returned aggregate-value
86 // + 6 words for passing parameters on the stack
88 // 23 words * 4 bytes per word = 92 bytes
91 // Round up to next doubleword boundary -- a double-word boundary
92 // is required by the ABI.
93 frameSize = alignTo(frameSize, 8);
98 bool SparcSubtarget::enableMachineScheduler() const {