arch：arc: use FLS instruction to get clz

Signed-off-by: Jingru <jingru@synopsys.com>
2020-05-25 17:25:52 +08:00
parent 204d269794
commit f8c58778bd
4 changed files with 7 additions and 5 deletions
--- a/arch/arc/arcem/port_config.h
+++ b/arch/arc/arcem/port_config.h
@@ -22,6 +22,6 @@
 #define TOS_CFG_CPU_DATA_SIZE               CPU_WORD_SIZE_32
 #define TOS_CFG_CPU_STK_GROWTH              CPU_STK_GROWTH_DESCENDING
 #define TOS_CFG_CPU_HRTIMER_EN              0u
-#define TOS_CFG_CPU_LEAD_ZEROS_ASM_PRESENT  0u
+#define TOS_CFG_CPU_LEAD_ZEROS_ASM_PRESENT  1u

 #endif /* _PORT_CONFIG_H_ */