kumquat-buildroot/arch/Config.in.x86
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

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# i386/x86_64 cpu features
config BR2_X86_CPU_HAS_MMX
bool
config BR2_X86_CPU_HAS_SSE
bool
config BR2_X86_CPU_HAS_SSE2
bool
config BR2_X86_CPU_HAS_SSE3
bool
config BR2_X86_CPU_HAS_SSSE3
bool
config BR2_X86_CPU_HAS_SSE4
bool
config BR2_X86_CPU_HAS_SSE42
bool
choice
prompt "Target Architecture Variant"
depends on BR2_i386 || BR2_x86_64
default BR2_x86_i586 if BR2_i386
help
Specific CPU variant to use
config BR2_x86_i386
bool "i386"
depends on !BR2_x86_64
config BR2_x86_i486
bool "i486"
depends on !BR2_x86_64
config BR2_x86_i586
bool "i586"
depends on !BR2_x86_64
config BR2_x86_i686
bool "i686"
depends on !BR2_x86_64
config BR2_x86_pentiumpro
bool "pentium pro"
depends on !BR2_x86_64
config BR2_x86_pentium_mmx
bool "pentium MMX"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_pentium_m
bool "pentium mobile"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
depends on !BR2_x86_64
config BR2_x86_pentium2
bool "pentium2"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_pentium3
bool "pentium3"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
depends on !BR2_x86_64
config BR2_x86_pentium4
bool "pentium4"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
depends on !BR2_x86_64
config BR2_x86_prescott
bool "prescott"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
depends on !BR2_x86_64
config BR2_x86_nocona
bool "nocona"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
config BR2_x86_core2
bool "core2"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
select BR2_X86_CPU_HAS_SSSE3
config BR2_x86_corei7
bool "corei7"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
select BR2_X86_CPU_HAS_SSSE3
select BR2_X86_CPU_HAS_SSE4
select BR2_X86_CPU_HAS_SSE42
config BR2_x86_atom
bool "atom"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
select BR2_X86_CPU_HAS_SSSE3
config BR2_x86_k6
bool "k6"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_k6_2
bool "k6-2"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_athlon
bool "athlon"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_athlon_4
bool "athlon-4"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
depends on !BR2_x86_64
config BR2_x86_opteron
bool "opteron"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
config BR2_x86_opteron_sse3
bool "opteron w/ SSE3"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
config BR2_x86_barcelona
bool "barcelona"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
config BR2_x86_jaguar
bool "jaguar"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
select BR2_X86_CPU_HAS_SSE2
select BR2_X86_CPU_HAS_SSE3
select BR2_X86_CPU_HAS_SSSE3
select BR2_X86_CPU_HAS_SSE4
select BR2_X86_CPU_HAS_SSE42
config BR2_x86_geode
bool "geode"
# Don't include MMX support because there several variant of geode
# processor, some with MMX support, some without.
# See: http://en.wikipedia.org/wiki/Geode_%28processor%29
depends on !BR2_x86_64
config BR2_x86_c3
bool "Via/Cyrix C3 (Samuel/Ezra cores)"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_c32
bool "Via C3-2 (Nehemiah cores)"
select BR2_X86_CPU_HAS_MMX
select BR2_X86_CPU_HAS_SSE
depends on !BR2_x86_64
config BR2_x86_winchip_c6
bool "IDT Winchip C6"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
config BR2_x86_winchip2
bool "IDT Winchip 2"
select BR2_X86_CPU_HAS_MMX
depends on !BR2_x86_64
endchoice
config BR2_ARCH
default "i386" if BR2_x86_i386
default "i486" if BR2_x86_i486
default "i586" if BR2_x86_i586
default "i586" if BR2_x86_pentium_mmx
default "i586" if BR2_x86_geode
default "i586" if BR2_x86_c3
default "i686" if BR2_x86_c32
default "i586" if BR2_x86_winchip_c6
default "i586" if BR2_x86_winchip2
default "i686" if BR2_x86_i686
default "i686" if BR2_x86_pentium2
default "i686" if BR2_x86_pentium3
default "i686" if BR2_x86_pentium4
default "i686" if BR2_x86_pentium_m
default "i686" if BR2_x86_pentiumpro
default "i686" if BR2_x86_prescott
default "i686" if BR2_x86_nocona && BR2_i386
default "i686" if BR2_x86_core2 && BR2_i386
default "i686" if BR2_x86_corei7 && BR2_i386
default "i686" if BR2_x86_atom && BR2_i386
default "i686" if BR2_x86_opteron && BR2_i386
default "i686" if BR2_x86_opteron_sse3 && BR2_i386
default "i686" if BR2_x86_barcelona && BR2_i386
default "i686" if BR2_x86_jaguar && BR2_i386
default "i686" if BR2_x86_k6
default "i686" if BR2_x86_k6_2
default "i686" if BR2_x86_athlon
default "i686" if BR2_x86_athlon_4
default "x86_64" if BR2_x86_64
config BR2_ENDIAN
default "LITTLE"
config BR2_ARCH_HAS_ATOMICS
default y if !BR2_x86_i386
config BR2_GCC_TARGET_ARCH
default "i386" if BR2_x86_i386
default "i486" if BR2_x86_i486
default "i586" if BR2_x86_i586
default "pentium-mmx" if BR2_x86_pentium_mmx
default "i686" if BR2_x86_i686
default "pentiumpro" if BR2_x86_pentiumpro
default "pentium-m" if BR2_x86_pentium_m
default "pentium2" if BR2_x86_pentium2
default "pentium3" if BR2_x86_pentium3
default "pentium4" if BR2_x86_pentium4
default "prescott" if BR2_x86_prescott
default "nocona" if BR2_x86_nocona
default "core2" if BR2_x86_core2
default "corei7" if BR2_x86_corei7
default "atom" if BR2_x86_atom
default "k8" if BR2_x86_opteron
default "k8-sse3" if BR2_x86_opteron_sse3
default "barcelona" if BR2_x86_barcelona
default "btver2" if BR2_x86_jaguar
default "k6" if BR2_x86_k6
default "k6-2" if BR2_x86_k6_2
default "athlon" if BR2_x86_athlon
default "athlon-4" if BR2_x86_athlon_4
default "winchip-c6" if BR2_x86_winchip_c6
default "winchip2" if BR2_x86_winchip2
default "c3" if BR2_x86_c3
default "c3-2" if BR2_x86_c32
default "geode" if BR2_x86_geode