linux_dsm_epyc7002/arch/mips/include
Maciej W. Rozycki cb5d4aad68 MIPS: bitops.h: Avoid inline asm for constant FLS
GCC is smart enough to substitute the final result for FLS calculations
as implemented in the fallback C code we have in `__fls' and `fls'
applied to constant values.  The presence of inline asm defeats the
compiler though, forcing it to emit extraneous CLZ/DCLZ calculation for
processors that support these instructions.

Use `__builtin_constant_p' then to avoid inline asm altogether for
constants.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9681/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-04-08 01:09:12 +02:00
..
asm MIPS: bitops.h: Avoid inline asm for constant FLS 2015-04-08 01:09:12 +02:00
uapi/asm Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-02-21 19:41:38 -08:00