3 ms·
In Clang, you can get the adc instruction using __builtin_addcl (and similar), but the compiler isn't that great of making optimal use of it. A few minutes of p
by pcwalton 8y ago
In Clang, you can get the adc instruction using __builtin_addcl (and similar), but the compiler isn't that great of making optimal use of it. A few minutes of playing around got me [1], which isn't very good code.
[1]: https://godbolt.org/z/hTzECo https://godbolt.org/z/hTzECo