[all-commits] [llvm/llvm-project] f5ad9c: [builtins] Write __divmoddi4/__divmodsi4 in terms ...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f5ad9c2e0ea60dc5426def7a54f04347a33a952e
      https://github.com/llvm/llvm-project/commit/f5ad9c2e0ea60dc5426def7a54f04347a33a952e
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-09-10 (Thu, 10 Sep 2020)

  Changed paths:
    M compiler-rt/lib/builtins/divmoddi4.c
    M compiler-rt/lib/builtins/divmodsi4.c

  Log Message:
  -----------
  [builtins] Write __divmoddi4/__divmodsi4 in terms __udivmod instead of __div and multiply.

Previously we calculating the remainder by multiplying the
quotient and divisor and subtracting from the dividend.

__udivmod can calculate the remainder while calculating the
quotient. We just need to correct the sign afterward.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D87433