Re: [PATCH 1/2] Add _arch_/_cpu_ to index_*/bit_* in x86 cpu-features.h

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Thu, Mar 3, 2016 at 3:52 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
> index_* and bit_* macros are used to access cpuid and feature arrays o
> struct cpu_features.  It is very easy to use bits and indices of cpuid
> array on feature array, especially in assembly codes.  For example,
> sysdeps/i386/i686/multiarch/bcopy.S has
>
>         HAS_CPU_FEATURE (Fast_Rep_String)
>
> which should be
>
>         HAS_ARCH_FEATURE (Fast_Rep_String)
>
> We change index_* and bit_* to index_cpu_*/index_arch_* and
> bit_cpu_*/bit_arch_* so that we can catch such error at build time.
>
>         [BZ #19762]
>         * sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
>         (EXTRA_LD_ENVVARS): Add _arch_ to index_*/bit_*.
>         * sysdeps/x86/cpu-features.c (init_cpu_features): Likewise.
>         * sysdeps/x86/cpu-features.h (bit_*): Renamed to ...
>         (bit_arch_*): This for feature array.
>         (bit_*): Renamed to ...
>         (bit_cpu_*): This for cpu array.
>         (index_*): Renamed to ...
>         (index_arch_*): This for feature array.
>         (index_*): Renamed to ...
>         (index_cpu_*): This for cpu array.
>         [__ASSEMBLER__] (HAS_FEATURE): Add and use field.
>         [__ASSEMBLER__] (HAS_CPU_FEATURE)): Pass cpu to HAS_FEATURE.
>         [__ASSEMBLER__] (HAS_ARCH_FEATURE)): Pass arch to HAS_FEATURE.
>         [!__ASSEMBLER__] (HAS_CPU_FEATURE): Replace index_##name and
>         bit_##name with index_cpu_##name and bit_cpu_##name.
>         [!__ASSEMBLER__] (HAS_ARCH_FEATURE): Replace index_##name and
>         bit_##name with index_arch_##name and bit_arch_##name.

Any comments?  This change is almost mechanical.  But it is
very useful to avoid typos.

-- 
H.J.