[Issue 18734] bitnum parameter of core.bitop.bt should be signed

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18734

Walter Bright <bugzilla at digitalmars.com> changed:

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--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
Huh, you are right. This:

https://www.felixcloutier.com/x86/bt

doesn't mention it's signed, but the AMD reference says it is.

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