This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 114a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-04-18

2724. Clarify rounding for arithmetic right shift

[Accepted as a DR at the June, 2023 meeting.]

(From editorial issue 6225.)

Subclause 7.6.7 [expr.shift] paragraph 3 specifies:

The value of E1 >> E2 is E1/2^E2, rounded down.

It is unclear whether "rounded down" means "towards zero" or "towards negative infinity".

Proposed resolution (approved by CWG 2023-05-12):

Change in 7.6.7 [expr.shift] paragraph 3 as follows:

The value of E1 >> E2 is E1/2^E2, rounded down towards negative infinity.