Displaying 2 results from an estimated 2 matches for "540156fe".
2020 Apr 22
2
_ExtInt, LLVM integers and constant time
Hello everyone,
After reading the nice blog post about _ExtInt, I was wondering whether
operations on i128/i256 and more generally on integer types in LLVM are
guaranteed to be constant time or not.
For instance, for now, the x86 & aarch64 backend generate constant time
code for additions on i256 integers (see https://godbolt.org/z/xMfkqz &
https://godbolt.org/z/jbkSpe), but is there
2020 Apr 22
3
_ExtInt, LLVM integers and constant time
...ger may also be target specific. For example, some targets may not provide a 1024 bit integer divide lib call, and may not want to open code it.
-Chris
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