[Vm-dev] FFI Testing - Curiouser and curiouser!

Eliot Miranda eliot.miranda at gmail.com
Thu Feb 14 02:57:56 UTC 2019

Hi Ken,

On Wed, Feb 13, 2019 at 1:58 PM <ken.dickey at whidbey.com> wrote:

> I noted a number of code generation differences between various gcc
> versions for aarch64, but there is something different going on.
> When I copied VM  binaries produced on the Chromebook Plus to Raspberry Pi
> 3 (ArchLinuxArm), the same 2 unit tests fail in Cuis!
> So I am now guessing there must be a shared library difference (perhaps
> libm ?)
> Having the same 2 tests fail on x86_64 would preclude a bad CPU chip.

What are the failing tests?  If they are comparing float values could it
simply be a precision error that requires inexact float comparison?  (e.g.
(a - b) abs < epsilon)

> ???
> -KenD

best, Eliot
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