On Mon, May 23, 2022 at 9:40 PM Roger Sayle wrote:
>
>
> It's not uncommon for GCC to convert between a (zero or one) Boolean
> value and a (zero or all ones) mask value, possibly of a wider type,
> using negation.
>
> Currently on x86_64, the following simple test case:
> __int128 foo(unsigned lo
It's not uncommon for GCC to convert between a (zero or one) Boolean
value and a (zero or all ones) mask value, possibly of a wider type,
using negation.
Currently on x86_64, the following simple test case:
__int128 foo(unsigned long x) { return -(__int128)x; }
compiles with -O2 to:
mov
