LLVM: include/llvm/MC/MCELFExtras.h Source File (original) (raw)
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9#ifndef LLVM_MC_MCELFEXTRAS_H
10#define LLVM_MC_MCELFEXTRAS_H
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18#include
19#include <type_traits>
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24template <bool Is64, class RelocsTy, class F>
26 using uint = std::conditional_t<Is64, uint64_t, uint32_t>;
27 uint OffsetMask = 8, Offset = 0, Addend = 0;
29 for (const auto &R : Relocs)
30 OffsetMask |= ToCrel(R).r_offset;
33 for (const auto &R : Relocs) {
34 auto CR = ToCrel(R);
35 auto DeltaOffset = static_cast<uint>((CR.r_offset - Offset) >> Shift);
37 uint8_t B = (DeltaOffset << 3) + (SymIdx != CR.r_symidx) +
38 (Type != CR.r_type ? 2 : 0) +
39 (Addend != uint(CR.r_addend) ? 4 : 0);
40 if (DeltaOffset < 0x10) {
42 } else {
45 }
46
47 if (B & 1) {
48 encodeSLEB128(static_cast<int32_t>(CR.r_symidx - SymIdx), OS);
49 SymIdx = CR.r_symidx;
50 }
51 if (B & 2) {
53 Type = CR.r_type;
54 }
55 if (B & 4) {
56 encodeSLEB128(std::make_signed_t(CR.r_addend - Addend), OS);
57 Addend = CR.r_addend;
58 }
59 }
60}
61}
62
63#endif
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
This file implements the C++20 header.
The instances of the Type class are immutable: once they are created, they are never changed.
This class implements an extremely fast bulk output stream that can only output to a stream.
void encodeCrel(raw_ostream &OS, RelocsTy Relocs, F ToCrel)
Definition MCELFExtras.h:25
constexpr unsigned CREL_HDR_ADDEND
int countr_zero(T Val)
Count number of 0's from the least significant bit to the most stopping at the first 1.
unsigned encodeSLEB128(int64_t Value, raw_ostream &OS, unsigned PadTo=0)
Utility function to encode a SLEB128 value to an output stream.
unsigned encodeULEB128(uint64_t Value, raw_ostream &OS, unsigned PadTo=0)
Utility function to encode a ULEB128 value to an output stream.