tests sc_array_functions_test fail due to floating point precision

[Eike Rathke]

Hi Milton,

On Saturday, 2017-12-02 02:47:03 -0500, Milton Vandersloot wrote:

> The issue seems to be (again) floating point precision. Indeed, I've compiled LibreOffice with FMA (fused multiply-add) instructions, if I disable them, i.e. passing -ffp-contract=off to GCC, then the tests succeed. Note that FMA has slightly different floating point precision than ordinary plus and mult [0, 1].

From what I understood by browsing shortly gcc enables this by default
for -std=gnu* and it can be unset by

#pragma STDC FP_CONTRACT OFF

https://stackoverflow.com/questions/15933100/how-to-use-fused-multiply-add-fma-instructions-with-sse-avx#15933677

Could you try if adding the pragma to include/sal/config.h helps?

Thanks
  Eike

-- 
LibreOffice Calc developer. Number formatter stricken i18n transpositionizer.
GPG key 0x6A6CD5B765632D3A - 2265 D7F3 A7B0 95CC 3918  630B 6A6C D5B7 6563 2D3A
Care about Free Software, support the FSFE https://fsfe.org/support/?erack
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/libreoffice/attachments/20171204/8a821ef3/attachment.sig>