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| author | Paul Burton <paul.burton@imgtec.com> | 2016-04-21 14:04:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2018-02-05 08:58:30 -0800 |
| commit | f67d2acc25243b22b247c9659ba0602667aba936 (patch) | |
| tree | 1e86dbab3a7986b967f85188f7f39693df9866cc /arch/mips/kernel/branch.c | |
| parent | d3154ef7038bc2ffdb4056b40d9e3771994d3852 (diff) | |
UPSTREAM: MIPS: math-emu: Fix m{add,sub}.s shifts
The code in _sp_maddf (formerly ieee754sp_madd) appears to have been
copied verbatim from ieee754sp_add, and although it's adding the
unpacked "r" & "z" floats it kept using macros that operate on "x" &
"y". This led to the addition being carried out incorrectly on some
mismash of the product, accumulator & multiplicand fields. Typically
this would lead to the assertions "ze == re" & "ze <= SP_EMAX" failing
since ze & re hadn't been operated upon.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction")
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13159/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
(cherry picked from commit db57f29d50683afd75c7f8b9908af7669837c3a9)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'arch/mips/kernel/branch.c')
0 files changed, 0 insertions, 0 deletions