1 //===-- RISCVTargetStreamer.cpp - RISCV Target Streamer Methods -----------===//
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 provides RISCV specific target streamer methods.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "RISCVTargetStreamer.h"
14 #include "RISCVBaseInfo.h"
15 #include "RISCVMCTargetDesc.h"
16 #include "llvm/Support/FormattedStream.h"
17 #include "llvm/Support/RISCVAttributes.h"
18 #include "llvm/Support/RISCVISAInfo.h"
19 
20 using namespace llvm;
21 
22 RISCVTargetStreamer::RISCVTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
23 
24 void RISCVTargetStreamer::finish() { finishAttributeSection(); }
25 void RISCVTargetStreamer::reset() {}
26 
27 void RISCVTargetStreamer::emitDirectiveOptionPush() {}
28 void RISCVTargetStreamer::emitDirectiveOptionPop() {}
29 void RISCVTargetStreamer::emitDirectiveOptionPIC() {}
30 void RISCVTargetStreamer::emitDirectiveOptionNoPIC() {}
31 void RISCVTargetStreamer::emitDirectiveOptionRVC() {}
32 void RISCVTargetStreamer::emitDirectiveOptionNoRVC() {}
33 void RISCVTargetStreamer::emitDirectiveOptionRelax() {}
34 void RISCVTargetStreamer::emitDirectiveOptionNoRelax() {}
35 void RISCVTargetStreamer::emitAttribute(unsigned Attribute, unsigned Value) {}
36 void RISCVTargetStreamer::finishAttributeSection() {}
37 void RISCVTargetStreamer::emitTextAttribute(unsigned Attribute,
38                                             StringRef String) {}
39 void RISCVTargetStreamer::emitIntTextAttribute(unsigned Attribute,
40                                                unsigned IntValue,
41                                                StringRef StringValue) {}
42 void RISCVTargetStreamer::setTargetABI(RISCVABI::ABI ABI) {
43   assert(ABI != RISCVABI::ABI_Unknown && "Improperly initialized target ABI");
44   TargetABI = ABI;
45 }
46 
47 void RISCVTargetStreamer::emitTargetAttributes(const MCSubtargetInfo &STI) {
48   if (STI.hasFeature(RISCV::FeatureRV32E))
49     emitAttribute(RISCVAttrs::STACK_ALIGN, RISCVAttrs::ALIGN_4);
50   else
51     emitAttribute(RISCVAttrs::STACK_ALIGN, RISCVAttrs::ALIGN_16);
52 
53   auto ParseResult = RISCVFeatures::parseFeatureBits(
54       STI.hasFeature(RISCV::Feature64Bit), STI.getFeatureBits());
55   if (!ParseResult) {
56     report_fatal_error(ParseResult.takeError());
57   } else {
58     auto &ISAInfo = *ParseResult;
59     emitTextAttribute(RISCVAttrs::ARCH, ISAInfo->toString());
60   }
61 }
62 
63 // This part is for ascii assembly output
64 RISCVTargetAsmStreamer::RISCVTargetAsmStreamer(MCStreamer &S,
65                                                formatted_raw_ostream &OS)
66     : RISCVTargetStreamer(S), OS(OS) {}
67 
68 void RISCVTargetAsmStreamer::emitDirectiveOptionPush() {
69   OS << "\t.option\tpush\n";
70 }
71 
72 void RISCVTargetAsmStreamer::emitDirectiveOptionPop() {
73   OS << "\t.option\tpop\n";
74 }
75 
76 void RISCVTargetAsmStreamer::emitDirectiveOptionPIC() {
77   OS << "\t.option\tpic\n";
78 }
79 
80 void RISCVTargetAsmStreamer::emitDirectiveOptionNoPIC() {
81   OS << "\t.option\tnopic\n";
82 }
83 
84 void RISCVTargetAsmStreamer::emitDirectiveOptionRVC() {
85   OS << "\t.option\trvc\n";
86 }
87 
88 void RISCVTargetAsmStreamer::emitDirectiveOptionNoRVC() {
89   OS << "\t.option\tnorvc\n";
90 }
91 
92 void RISCVTargetAsmStreamer::emitDirectiveOptionRelax() {
93   OS << "\t.option\trelax\n";
94 }
95 
96 void RISCVTargetAsmStreamer::emitDirectiveOptionNoRelax() {
97   OS << "\t.option\tnorelax\n";
98 }
99 
100 void RISCVTargetAsmStreamer::emitAttribute(unsigned Attribute, unsigned Value) {
101   OS << "\t.attribute\t" << Attribute << ", " << Twine(Value) << "\n";
102 }
103 
104 void RISCVTargetAsmStreamer::emitTextAttribute(unsigned Attribute,
105                                                StringRef String) {
106   OS << "\t.attribute\t" << Attribute << ", \"" << String << "\"\n";
107 }
108 
109 void RISCVTargetAsmStreamer::emitIntTextAttribute(unsigned Attribute,
110                                                   unsigned IntValue,
111                                                   StringRef StringValue) {}
112 
113 void RISCVTargetAsmStreamer::finishAttributeSection() {}
114