[PATCH] D53115: [COFF, ARM64] Add _ReadStatusReg and_WriteStatusReg intrinsics

[Mandeep Singh Grang via Phabricator via cfe-commits]

mgrang added a comment.

_ReadStatusReg and _WriteStatusReg intrinsics take ARM64_REGNO as input. These are defined in https://www.codemachine.com/downloads/win10/winnt.h.
LLVM already has intrinsics to read/write status regs: __builtin_arm_rsr/__builtin_arm_wsr. But these take the string concatenation of the byte repesentation of a register (like "1:2:3:4:5"). So I convert ARM64_REGNO to this string format and invoke read_register/write_register intrinsics.


Repository:
  rC Clang

https://reviews.llvm.org/D53115