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;
47 InsertNOPLoad = false;
48 FixAllFDIVSQRT = false;
49 DetectRoundChange = false;
51 // Determine default and user specified characteristics
52 std::string CPUName = CPU;
54 CPUName = (Is64Bit) ? "v9" : "v8";
56 // Parse features string.
57 ParseSubtargetFeatures(CPUName, FS);
59 // Popc is a v9-only instruction.
66 SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU,
67 const std::string &FS, const TargetMachine &TM,
69 : SparcGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT), Is64Bit(is64Bit),
70 InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
71 FrameLowering(*this) {}
73 int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
76 // All 64-bit stack frames must be 16-byte aligned, and must reserve space
77 // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
79 // Frames with calls must also reserve space for 6 outgoing arguments
80 // whether they are used or not. LowerCall_64 takes care of that.
81 frameSize = alignTo(frameSize, 16);
83 // Emit the correct save instruction based on the number of bytes in
84 // the frame. Minimum stack frame size according to V8 ABI is:
85 // 16 words for register window spill
86 // 1 word for address of returned aggregate-value
87 // + 6 words for passing parameters on the stack
89 // 23 words * 4 bytes per word = 92 bytes
92 // Round up to next doubleword boundary -- a double-word boundary
93 // is required by the ABI.
94 frameSize = alignTo(frameSize, 8);
99 bool SparcSubtarget::enableMachineScheduler() const {