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2018 Feb 28
0
How to handle UMULO?
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2018 Feb 28
2
How to handle UMULO?
Hi All,
While compiling libgcc, I find I have to deal with UMULO (overflow-aware
unsigned multiplication) SDNode. UMULO returns the result of
multiplication, and a boolean indicating overflow occurred or not. Our
target's multiply instruction doesn't care (detect) overflow. I am
wondering if I can always set the boolean to false. I am not sure about
this as I see AArch64 [1] seems