Dec. 14, 2023
6:48 p.m.
On 12/14/23 03:17, RekGRpth via tz wrote:
The value of expression 'thistimecnt >> 31 >> 31 >> 2' (in zic.c) is zero regardless of the value of the left operand 'thistimecnt', because it is shifted by 64 (in total) bits, which is greater or equal to its size of 64 bits.
Its width is 64 bits on platforms where PTRDIFF_WIDTH == 64, but the C Standard allows PTRDIFF_WIDTH to be greater than 64. Admittedly few platforms do that today, but we might as well be portable to them.