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2024-02-14mips: Use builtins for ffs and ffsllJunxian Zhu1-0/+3
__builtin_ffs{,ll} basically on __builtin_ctz{,ll} in MIPS GCC compiler. The hardware ctz instructions were available after MIPS{32,64} Release1. By using builtin ctz. It can also reduce code size of ffs/ffsll. Checked on mips o32. mips64. Signed-off-by: Junxian Zhu <zhujunxian@oss.cipunited.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>