[PATCH] D88629: [lld-macho] Add ARM64 target arch

[Thorsten via Phabricator via llvm-commits]

tschuett added a comment.

Sorry for being slow.

For every adrp instruction you call fixupPage21.

  inline uint64_t fixupPage21(uint64_t encoding, uint64_t va) {
    return (encoding | bitField(va, 12, 2, 29) | bitField(va, 14, 19, 5));
  }

According to the ARMARM. the PC relative address is encoded into two sections. One starting at offset 5 and the width is 19. The second one starts at offset 29 and the width is 2. That matches the 2 and 29 and the 19 and 5 in fixupPage 21. I don't know yet how the explain the 12 and 14.


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  https://reviews.llvm.org/D88629/new/

https://reviews.llvm.org/D88629