[PATCH] D132323: [LoongArch] Port over minimal applyFixup from RISCV
Lu Weining via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Aug 26 02:39:13 PDT 2022
This revision was automatically updated to reflect the committed changes.
Closed by commit rG23b2fbf9ecf6: [LoongArch] Port over minimal applyFixup from RISCV (authored by WANG Xuerui <git at xen0n.name>, committed by SixWeining).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D132323/new/
https://reviews.llvm.org/D132323
Files:
llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
Index: llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
===================================================================
--- llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
+++ llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
@@ -73,8 +73,27 @@
MutableArrayRef<char> Data, uint64_t Value,
bool IsResolved,
const MCSubtargetInfo *STI) const {
- // TODO: Apply the Value for given Fixup into the provided data fragment.
- return;
+ if (!Value)
+ return; // Doesn't change encoding.
+
+ MCFixupKind Kind = Fixup.getKind();
+ if (Kind >= FirstLiteralRelocationKind)
+ return;
+ MCFixupKindInfo Info = getFixupKindInfo(Kind);
+ // TODO: Apply any target-specific value adjustments.
+
+ // Shift the value into position.
+ Value <<= Info.TargetOffset;
+
+ unsigned Offset = Fixup.getOffset();
+ unsigned NumBytes = alignTo(Info.TargetSize + Info.TargetOffset, 8) / 8;
+
+ assert(Offset + NumBytes <= Data.size() && "Invalid fixup offset!");
+ // For each byte of the fragment that the fixup touches, mask in the
+ // bits from the fixup value.
+ for (unsigned I = 0; I != NumBytes; ++I) {
+ Data[Offset + I] |= uint8_t((Value >> (I * 8)) & 0xff);
+ }
}
bool LoongArchAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
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