[all-commits] [llvm/llvm-project] 6e561d: [Intrinsic] Add fixed point saturating division in...

[Bevin Hansson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6e561d1c94edc2ecaab7b79f6b3f1a06f515d531
      https://github.com/llvm/llvm-project/commit/6e561d1c94edc2ecaab7b79f6b3f1a06f515d531
  Author: Bevin Hansson <bevin.hansson at ericsson.com>
  Date:   2020-02-24 (Mon, 24 Feb 2020)

  Changed paths:
    M llvm/docs/LangRef.rst
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/include/llvm/IR/Intrinsics.td
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/IR/Verifier.cpp
    A llvm/test/CodeGen/X86/sdiv_fix_sat.ll
    A llvm/test/CodeGen/X86/udiv_fix_sat.ll

  Log Message:
  -----------
  [Intrinsic] Add fixed point saturating division intrinsics.

Summary:
This patch adds intrinsics and ISelDAG nodes for signed
and unsigned fixed-point division:

```
llvm.sdiv.fix.sat.*
llvm.udiv.fix.sat.*
```

These intrinsics perform scaled, saturating division
on two integers or vectors of integers. They are
required for the implementation of the Embedded-C
fixed-point arithmetic in Clang.

Reviewers: bjope, leonardchan, craig.topper

Subscribers: hiraditya, jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71550