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path: root/arch/mips/math-emu/ieee754sp.h
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2017-11-07MIPS: math-emu: Use preferred flavor of unsigned integer declarationsAleksandar Markovic
Fix occurences of unsigned integer variable declarations that are not preferred by standards of checkpatch scripts. This removes a significant number of checkpatch warnings for files in math-emu directory (several files become completely warning-free), and thus makes easier to spot (now and in the future) other, perhaps more significant, checkpatch errors and warnings. Signed-off-by: Aleksandar Markovic <aleksandar.markovic@mips.com> Reviewed-by: James Hogan <jhogan@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Douglas Leung <douglas.leung@mips.com> Cc: Goran Ferenc <goran.ferenc@mips.com> Cc: "Maciej W. Rozycki" <macro@imgtec.com> Cc: Manuel Lauss <manuel.lauss@gmail.com> Cc: Miodrag Dinic <miodrag.dinic@mips.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Petar Jovanovic <petar.jovanovic@mips.com> Cc: Raghu Gandham <raghu.gandham@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17582/ Signed-off-by: James Hogan <jhogan@kernel.org>
2017-08-29MIPS: math-emu: <MADDF|MSUBF>.S: Fix accuracy (32-bit case)Douglas Leung
Implement fused multiply-add with correct accuracy. Fused multiply-add operation has better accuracy than respective sequential execution of multiply and add operations applied on the same inputs. This is because accuracy errors accumulate in latter case. This patch implements fused multiply-add with the same accuracy as it is implemented in hardware, using 64-bit intermediate calculations. One test case example (raw bits) that this patch fixes: MADDF.S fd,fs,ft: fd = 0x22575225 fs = ft = 0x3727c5ac Fixes: e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction") Fixes: 83d43305a1df ("MIPS: math-emu: Add support for the MIPS R6 MSUBF FPU instruction") Signed-off-by: Douglas Leung <douglas.leung@imgtec.com> Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.7+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16890/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-05-13MIPS: math-emu: Fix m{add,sub}.s shiftsPaul Burton
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>
2016-05-13MIPS: math-emu: Add z argument macrosPaul Burton
Introduce macros for handling the "z" argument to maddf & msubf, making its handling consistent with that of the "x" & "y" arguments rather than open-coding equivalents. Signed-off-by: Paul Burton <paul.burton@imgtec.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/13156/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-04-08MIPS: math-emu: Make NaN classifiers staticMaciej W. Rozycki
The `ieee754sp_isnan' and `ieee754dp_isnan' NaN classifiers are now no longer externally referred, remove their header prototypes and make them local to the two only respective places still making use of them. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9693/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Cleanup coding style.Ralf Baechle
o Only define variables in the outermost block o One empty line at most o Format comments as per CodingStyle o Update FSF address in licensing term comment o Spell FPU and MIPS in all capitals. o Remove ####-type of lines in comments. o Try to make things a bit most consistent between sp_*.c / dp_*.c files. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Cleanup definition of structs describe sp/dp floats.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Get rid of the useless parts of exception handling.Ralf Baechle
All it really did was throw a printk for no obvious reason. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Inline ieee754sp_issnan and ieee754dp_issnan.Ralf Baechle
Shaves another 16 bytes off but more importantly avoids function calls. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Remove unused ieee754sp_bestnan() and ieee754dp_bestnan().Ralf Baechle
Both are unused since lmo commit fdffbafbb38723618626c70ffdc6ff9175cdffa2 [Lots of FPU bug fixes from Kjeld Borch Egevang.] Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Inline ieee754dp_finite and ieee754dp_finite().Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Eleminate duplicate definitions of identical macros.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23MIPS: math-emu: Replace DP_MBITS with DP_FBITS and SP_MBITS with SP_FBITS.Ralf Baechle
Both were defined as 23 rsp. 52 though the mentissa is actually a bit more than the fraction. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-21MIPS: math-emu: Turn macros into functions where possible.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-21MIPS: math-emu: Reformat code according to coding style.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-21MIPS: math-emu: Get rid of typedefs.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-21MIPS: math-emu: Mark exception handling functions as __cold.Ralf Baechle
Optimizes the code flow and shaves of half a percent of the math-emu code size. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-10-18Update broken web addresses in arch directory.Justin P. Mattock
The patch below updates broken web addresses in the arch directory. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2008-04-28[MIPS] replace __inline with inlineHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11[MIPS] checkfiles: Fix "need space after that ','" errors.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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