kernel/arch/powerpc/math-emu/mtfsf.c, branch linux-4.3.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-4.3.y2014-04-07T00:33:11Zpowerpc: Correct emulated mtfsf instruction2014-04-07T00:33:11ZStephen Chiversschivers@csc.com2014-02-21T01:29:48Zurn:sha1:c59c015b6aa5bc18d01c8e482149086cafd7332a
The emulated (CONFIG_MATH_EMULATION_FULL)
PowerPC Floating Point instruction mtfsf
does not correctly copy bits from its source
register to the Floating Point Status and Register (FPSCR).
The error is in the preparation of the mask used to
select the bits to be copied from the source to the FPSCR.
Execution of the mtfsf instruction does not produce the same
results on a MPC8548 platform (emulated floating point)
as on MPC7410 or 440EP platforms (hardware floating point).
This error has been detected using a Freescale MPC8548
based platform and the patch below tested using that platform.
The patch is based on the patch(es) provided by
Gabriel Paubert and analysis by Gabriel, James Yang and David Laight.
Signed-off-by: Stephen Chivers <schivers@csc.com>
Signed-off-by: Gabriel Paubert <paubert@iram.es>
Tested-by: Stephen Chivers <schivers@csc.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/math-emu: Use kernel generic math-emu code2008-10-01T13:40:07ZKumar Galagalak@kernel.crashing.org2008-06-04T07:59:29Zurn:sha1:d2b194ed820880eb19c43b9c10d9f5f30026ee54
The math emulation code is centered around a set of generic macros that
provide the core of the emulation that are shared by the various
architectures and other projects (like glibc). Each arch implements its
own sfp-machine.h to specific various arch specific details.
For historic reasons that are now lost the powerpc math-emu code had
its own version of the common headers. This moves us to using the
kernel generic version and thus getting fixes when those are updated.
Also cleaned up exception/error reporting from the FP emulation functions.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
[POWERPC] Replace remaining __FUNCTION__ occurrences2008-04-01T09:43:09ZHarvey Harrisonharvey.harrison@gmail.com2008-03-28T21:21:07Zurn:sha1:e48b1b452ff630288c930fd8e0c2d808bc15f7ad
__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
powerpc: move math-emu over to arch/powerpc2006-03-28T05:43:27ZKumar Galagalak@kernel.crashing.org2006-03-28T05:43:27Zurn:sha1:5cd272085bbc905532869f3e1fd18a7100496b56
Towards the goal of having arch/powerpc not build anything over in arch/ppc
move math-emu over. Also, killed some references to arch/ppc/ in the
arch/powerpc Makefile which should belong in drivers/ when the particular
sub-arch's move over to arch/powerpc.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>