[all-commits] [llvm/llvm-project] 2f8178: [ARM][FPEnv] Lowering of fpmode intrinsics (#74054)

[Serge Pavlov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2f8178806770b549c054b02ae3556b454cdeb722
      https://github.com/llvm/llvm-project/commit/2f8178806770b549c054b02ae3556b454cdeb722
  Author: Serge Pavlov <sepavloff at gmail.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    M llvm/lib/Target/ARM/ARMISelLowering.h
    M llvm/lib/Target/ARM/ARMInstrVFP.td
    M llvm/test/CodeGen/ARM/fpenv.ll

  Log Message:
  -----------
  [ARM][FPEnv] Lowering of fpmode intrinsics (#74054)

LLVM intrinsics `get_fpmode`, `set_fpmode` and `reset_fpmode` operate
control modes, the bits of FP environment that affect FP operations. On
ARM these bits are in FPSCR together with the status bits. The
implementation of these intrinsics produces code close to that of
functions `fegetmode` and `fesetmode` from GLIBC.

Pull request: https://github.com/llvm/llvm-project/pull/74054