LLVM 17.0.0git
SparcSubtarget.cpp
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1//===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the SPARC specific subclass of TargetSubtargetInfo.
10//
11//===----------------------------------------------------------------------===//
12
13#include "SparcSubtarget.h"
14#include "Sparc.h"
17
18using namespace llvm;
19
20#define DEBUG_TYPE "sparc-subtarget"
21
22#define GET_SUBTARGETINFO_TARGET_DESC
23#define GET_SUBTARGETINFO_CTOR
24#include "SparcGenSubtargetInfo.inc"
25
26void SparcSubtarget::anchor() { }
27
29 StringRef FS) {
30 UseSoftMulDiv = false;
31 IsV9 = false;
32 IsLeon = false;
33 V8DeprecatedInsts = false;
34 IsVIS = false;
35 IsVIS2 = false;
36 IsVIS3 = false;
37 HasHardQuad = false;
38 UsePopc = false;
39 UseSoftFloat = false;
40 HasNoFSMULD = false;
41 HasNoFMULS = false;
42
43 // Leon features
44 HasLeonCasa = false;
45 HasUmacSmac = false;
46 HasPWRPSR = false;
47 InsertNOPLoad = false;
48 FixAllFDIVSQRT = false;
49 DetectRoundChange = false;
50 HasLeonCycleCounter = false;
51
52 // Determine default and user specified characteristics
53 std::string CPUName = std::string(CPU);
54 if (CPUName.empty())
55 CPUName = (Is64Bit) ? "v9" : "v8";
56
57 // Parse features string.
58 ParseSubtargetFeatures(CPUName, /*TuneCPU*/ CPUName, FS);
59
60 // Popc is a v9-only instruction.
61 if (!IsV9)
62 UsePopc = false;
63
64 return *this;
65}
66
67SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU,
68 const std::string &FS, const TargetMachine &TM,
69 bool is64Bit)
70 : SparcGenSubtargetInfo(TT, CPU, /*TuneCPU*/ CPU, FS), TargetTriple(TT),
71 Is64Bit(is64Bit), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
72 TLInfo(TM, *this), FrameLowering(*this) {}
73
74int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
75
76 if (is64Bit()) {
77 // All 64-bit stack frames must be 16-byte aligned, and must reserve space
78 // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
79 frameSize += 128;
80 // Frames with calls must also reserve space for 6 outgoing arguments
81 // whether they are used or not. LowerCall_64 takes care of that.
82 frameSize = alignTo(frameSize, 16);
83 } else {
84 // Emit the correct save instruction based on the number of bytes in
85 // the frame. Minimum stack frame size according to V8 ABI is:
86 // 16 words for register window spill
87 // 1 word for address of returned aggregate-value
88 // + 6 words for passing parameters on the stack
89 // ----------
90 // 23 words * 4 bytes per word = 92 bytes
91 frameSize += 92;
92
93 // Round up to next doubleword boundary -- a double-word boundary
94 // is required by the ABI.
95 frameSize = alignTo(frameSize, 8);
96 }
97 return frameSize;
98}
99
101 return true;
102}
const char LLVMTargetMachineRef TM
return InstrInfo
static bool is64Bit(const char *name)
int getAdjustedFrameSize(int stackSize) const
Given a actual stack size as determined by FrameInfo, this function returns adjusted framesize which ...
bool enableMachineScheduler() const override
void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS)
ParseSubtargetFeatures - Parses features string setting specified subtarget options.
SparcSubtarget & initializeSubtargetDependencies(StringRef CPU, StringRef FS)
SparcSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const TargetMachine &TM, bool is64bit)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:78
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
uint64_t alignTo(uint64_t Size, Align A)
Returns a multiple of A needed to store Size bytes.
Definition: Alignment.h:155