On 23/02/21 23:13 +0100, Matthias Kretz wrote:
I like the idea.
On Dienstag, 23. Februar 2021 14:25:10 CET Cassio Neri via Libstdc++ wrote:
((__m ^ (__m >> 3)) & 1) | 30
Note that you can drop the `& 1` part. 30 in binary is 0b0. ORing with a
value in [0, 0b01101] will only toggle the
I like the idea.
On Dienstag, 23. Februar 2021 14:25:10 CET Cassio Neri via Libstdc++ wrote:
> ((__m ^ (__m >> 3)) & 1) | 30
Note that you can drop the `& 1` part. 30 in binary is 0b0. ORing with a
value in [0, 0b01101] will only toggle the last bit.
--
This patch reimplements std::chrono::year_month_day_last:day() which yields the
last day of a particular month. The current implementation uses a look-up table
implemented as an unsigned[12] array. The new implementation instead
is based on
the fact that a month m in [1, 12], except for m == 2
