On Thu, Oct 22, 2020 at 09:06:29PM +0100, Al Viro wrote:
On Thu, Oct 22, 2020 at 08:24:58PM +0100, Al Viro wrote:
quoted
Depending upon the calling conventions, compiler might do truncation in caller or
in a callee, but it must be done _somewhere_.
Unless I'm misreading AAPCS64,
"Unlike in the 32-bit AAPCS, named integral values must be narrowed by the callee
rather than the caller"
in 6.4.2 means that callee must not _not_ expect the upper 32 bits of %x0..%x7 to contain
Sorry, artefact of editing - that's
"in 6.4.2 means that callee must _not_ expect the upper 32 bits of %x0..%x7 to contain"
obviously.