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| author | Junxian Zhu <zhujunxian@oss.cipunited.com> | 2024-02-06 16:34:56 +0800 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-02-14 12:20:49 -0300 |
| commit | 545480506fc6576ea37a14e56c654935c691709d (patch) | |
| tree | 35a29428ec2c82aef6ed6a0f3af2ebd9a40726be | |
| parent | 491e55beab7457ed310a4a47496f4a333c5d1032 (diff) | |
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mips: Use builtins for ffs and ffsll
__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>
| -rw-r--r-- | sysdeps/mips/math-use-builtins-ffs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/mips/math-use-builtins-ffs.h b/sysdeps/mips/math-use-builtins-ffs.h new file mode 100644 index 0000000000..2ab6a03a16 --- /dev/null +++ b/sysdeps/mips/math-use-builtins-ffs.h @@ -0,0 +1,3 @@ +#include <sysdep.h> +#define USE_FFS_BUILTIN (__mips_isa_rev >= 1) +#define USE_FFSLL_BUILTIN (__mips_isa_rev >= 1) |