Commit Graph

12 Commits

Author SHA1 Message Date
Gustavo Zacarias
50451998f0 arch: add support for AMD steamroller
Add support for AMD steamroller optimizations, available in gcc 4.8+ as
bdver3.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-03-04 22:16:41 +01:00
Peter Korsgaard
80e4060908 arch/Config.in.x86: drop BR2_x86_generic
The fuzzy generic x86 variant doesn't make much sense in the context of
Buildroot, and the recent change to use -march instead of -mtune broke it.

From the GCC manual:

https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options:

-mtune=cpu-type
    Tune to cpu-type everything applicable about the generated code,
    except for the ABI and the set of available instructions. While
    picking a specific cpu-type schedules things appropriately for that
    particular chip, the compiler does not generate any code that cannot
    run on the default machine type unless you use a -march=cpu-type
    option. For example, if GCC is configured for i686-pc-linux-gnu then
    -mtune=pentium4 generates code that is tuned for Pentium 4 but still
    runs on i686 machines.

    The choices for cpu-type are the same as for -march. In addition,
    -mtune supports 2 extra choices for cpu-type:

    ‘generic’
        Produce code optimized for the most common IA32/AMD64/EM64T
        processors. If you know the CPU on which your code will run,
        then you should use the corresponding -mtune or -march option
        instead of -mtune=generic. But, if you do not know exactly what
        CPU users of your application will have, then you should use
        this option.

        As new processors are deployed in the marketplace, the behavior
        of this option will change. Therefore, if you upgrade to a newer
        version of GCC, code generation controlled by this option will
        change to reflect the processors that are most common at the
        time that version of GCC is released.

        There is no -march=generic option because -march indicates the
        instruction set the compiler can use, and there is no generic
        instruction set applicable to all processors. In contrast,
        -mtune indicates the processor (or, in this case, collection of
        processors) for which the code is optimized.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-11-07 19:51:06 +01:00
Thomas Petazzoni
6bec1d5191 arch/x86: get rid of BR2_GCC_TARGET_TUNE
According to the gcc documentation, -march implies -mtune on x86, so
defining both BR2_GCC_TARGET_ARCH and BR2_GCC_TARGET_TUNE is
redundant. Therefore, this commit removes the definition of
BR2_GCC_TARGET_TUNE on x86.

However, while doing so, it adds one new case for BR2_GCC_TARGET_ARCH:
using -march=generic when BR2_x86_generic is selected.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-11-07 00:09:21 +01:00
Yann E. MORIN
4f07578a86 arch/x86: all x86 but i386 has atomics operations
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-08-18 11:03:16 +02:00
Bernd Kuhls
affb6a3853 arch: add support for "corei7" Intel CPU optimisations
gcc support was added in version 4.6:
http://gcc.gnu.org/gcc-4.6/changes.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-05-03 03:39:29 +02:00
Adrien Béraud
485f07dd4c arch: use BR2_X86_CPU_HAS_SSE4, SSE42 with jaguar
This follow-up commit adds support for SSE 4 and SSE 4.2 to
the jaguar architecture.

Signed-off-by: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-01-20 22:21:11 +01:00
Adrien Béraud
a20cb38659 arch: add support for "jaguar" AMD CPU optimisations
AMD Jaguar ( https://en.wikipedia.org/wiki/Jaguar_%28microarchitecture%29 ) is
suddenly a popular architecture since it is used in the PS4 and the XBox One.
Many embedded systems are also likely to use it in the next years.

This patch adds support for GCC architecture-specific optimisations and
tuning for these CPUs.
These optimizations are available with GCC 4.8+.

Signed-off-by: Adrien Beraud <adrien.beraud@savoirfairelinux.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-01-15 23:19:46 +01:00
Bernd Kuhls
0e8e3c2879 ffmpeg: Add sse4 related options BR2_X86_CPU_HAS_SSE4 / BR2_X86_CPU_HAS_SSE4
Signed-off-by: Bernd Kuhls <berndkuhls@hotmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-01-13 22:28:42 +01:00
Richard Braun
2a27ad3d79 arch: fix BR2_ARCH for generic target variant
Signed-off-by: Richard Braun <rbraun@sceen.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-12-20 15:15:24 +01:00
Thomas Petazzoni
171075ed4f arch: Config.in string configuration options must be quoted
Suggested by Yann E. Morin.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reported-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-11-15 16:39:51 +01:00
Thomas Petazzoni
44c04a2b4a arch: improve definition of gcc mtune, mcpu, etc.
As suggested by Yann E. Morin, there is a better way than our current
big Config.in.common to define the gcc mtune, mcpu, march,
etc. values. We can split the setting of those values in each
architecture file, which makes a lot more sense.

Therefore, the Config.in file now creates empty kconfig variables
BR2_ARCH, BR2_ENDIAN, BR2_GCC_TARGET_TUNE, BR2_GCC_TARGET_ARCH,
BR2_GCC_TARGET_ABI and BR2_GCC_TARGET_CPU. The values of those
variables are set by the individual Config.in.<arch> files. This is
possible because such files are now only conditionally included
depending on the top-level architecture that has been selected.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-11-15 16:12:46 +01:00
Thomas Petazzoni
79ee3c1f84 Split target/Config.in.arch into multiple Config.in.* in arch/
target/Config.in.arch had become too long, and we want to remove the
target/ directory. So let's move it to arch/ and split it this way:

 * An initial Config.in that lists the top-level architecture, and
   sources the arch-specific Config.in.<arch> files, as well as
   Config.in.common (see below)

 * One Config.in.<arch> per architecture, listing the CPU families,
   ABI choices, etc.

 * One Config.in.common that defines the gcc mtune, march, mcpu values
   and other hidden options.

[Peter: space->tab fix, mipsel64 little endian, mips3 as noted by Arnout]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-11-04 12:51:38 +01:00