[PATCH] D27309: builtins: Add ARM Thumb1 implementation for uidiv and uidivmod

[Weiming Zhao via Phabricator via llvm-commits]

weimingz created this revision.
weimingz added reviewers: rengolin, jmolloy.
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The current uidiv supports archs without clz. However, the asm is for thumb2/arm.
For uidivmod, the existing code calls the C version of uidivmodsi4, which then calls uidiv. The extra push/pop/bl makes it less efficient.


https://reviews.llvm.org/D27309

Files:
  lib/builtins/arm/aeabi_uidivmod.S
  lib/builtins/arm/udivsi3.S
  lib/builtins/assembly.h

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