rm48x50: optimize a BEQ

Use condition flag in the ORR. This could eliminate a BEQ.
2013-05-26 23:37:56 +08:00 · 2013-05-26 23:37:56 +08:00 · f08df08897
parent 19fe6251e7
commit f08df08897
1 changed files with 1 additions and 3 deletions
--- a/libcpu/arm/rm48x50/context_ccs.asm
+++ b/libcpu/arm/rm48x50/context_ccs.asm
@ -53,10 +53,8 @@ rt_hw_context_switch

    MRS     r4, cpsr
    TST     lr, #0x01
-    BEQ     _ARM_MODE
-    ORR     r4, r4, #0x20       ; it's thumb code
+    ORRNE   r4, r4, #0x20       ; it's thumb code

-_ARM_MODE
    STMFD   sp!, {r4}           ; push cpsr

    STR     sp, [r0]            ; store sp in preempted tasks TCB