[PATCH] D27309: builtins: Add ARM Thumb1 implementation for uidiv and uidivmod
Weiming Zhao via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Dec 1 10:19:15 PST 2016
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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