================
@@ -831,6 +832,14 @@ of different sizes and signs is forbidden in binary and
ternary builtins.
semantics, see `LangRef
<http://llvm.org/docs/LangRef.html#llvm-min-intrinsics-comparation>`_
for the comparison.
+ T __builtin_elementwise_clz(T x[, T y]) return the number of leading 0
bits in the first argument. If integer types
+ the first argument is 0 and an
optional second argument is provided,
+ the second argument is
returned. If the first argument is 0 but only
+ one argument is provided, the
behaviour is undefined.
+ T __builtin_elementwise_ctz(T x[, T y]) return the number of trailing
0 bits in the first argument. If integer types
+ the first argument is 0 and an
optional second argument is provided,
+ the second argument is
returned. If the first argument is 0 but only
+ one argument is provided, the
behaviour is undefined.
----------------
frasercrmck wrote:
> On regular __builtin_clz/ctz the gcc docs state "result is undefined". Not
> the program is undefined
That makes sense, yep. I've updated to use that language here.
https://github.com/llvm/llvm-project/pull/131995
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
