From: Maciej W. Rozycki <macro@linux-mips.org>
Date: Fri, 3 Apr 2015 22:25:18 +0000 (+0100)
Subject: MIPS: math-emu: Update sNaN quieting handlers
X-Git-Tag: omap-for-v4.1/fixes-rc1~111^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec98f9a01ffb23ea72471ccbc8c390c8c2e4c0b3;p=pandora-kernel.git

MIPS: math-emu: Update sNaN quieting handlers

Commit fdffbafb [Lots of FPU bug fixes from Kjeld Borch Egevang.]
replaced the two single `ieee754sp_nanxcpt' and `ieee754dp_nanxcpt'
places, where sNaN quieting used to happen for single and double
floating-point operations respectively, with individual qNaN
instantiations across all the call sites instead.  It also made most of
these two functions dead code as where called on a qNaN they return
right away.

To revert the damage and make sNaN quieting uniform again first rewrite
`ieee754sp_nanxcpt' and `ieee754dp_nanxcpt' to do the same quieting all
the call sites do, that is return the default qNaN encoding for all
input sNaN values; never propagate any sNaN payload bits from its
trailing significand field.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9685/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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