On Sun, 19 Apr 2015, Joel Hestness wrote:
On April 19, 2015, 3:19 a.m., Steve Reinhardt wrote:
Although I agree that the name "divide-by-zero" is not the most
clearly descriptive, that is the name of the exception in the x86
architecture (see for example http://wiki.osdev.org/Exceptions, or
Table 2-1 of Vol 3 of the AMD64 Architecture Programmer's Manual. If
you think it needs more comments to explain this discrepancy, that's
fine, but I think we should keep the exception names consistent with
the architecture definition.
While I think we should leave the AMD naming, it's probably worth
noting/commenting that Intel calls the 0 (#DE) exception a "divide
error" in their documentation.
http://www.intel.com/Assets/en_US/PDF/manual/253668.pdf,
http://ensiwiki.ensimag.fr/images/0/09/4MMPS_traps.pdf
I was reading Intel's documentation, and as Joel pointed, Intel uses
"divide error". Also note that the exception DE is raised not only when
divide-by-zero error happens, but also when the quotient cannot reside in
the provided space. So divide-by-zero is incomplete. Hence the review
request.
--
Nilay
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