From: Matt Sealey <[email protected]> LZO leaves some performance on the table by not realising that arm64 can optimize count-trailing-zeros bit operations.
Add CONFIG_ARM64 to the checked definitions alongside CONFIG_X86_64 to enable the use of rbit/clz instructions on full 64-bit quantities. Signed-off-by: Matt Sealey <[email protected]> Signed-off-by: Dave Rodgman <[email protected]> --- lib/lzo/lzodefs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/lzo/lzodefs.h b/lib/lzo/lzodefs.h index c0193f726db0..c8965dc181df 100644 --- a/lib/lzo/lzodefs.h +++ b/lib/lzo/lzodefs.h @@ -28,7 +28,7 @@ #if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN) #error "conflicting endian definitions" -#elif defined(CONFIG_X86_64) +#elif defined(CONFIG_X86_64) || defined(CONFIG_ARM64) #define LZO_USE_CTZ64 1 #define LZO_USE_CTZ32 1 #elif defined(CONFIG_X86) || defined(CONFIG_PPC) -- 2.16.4
