.global _start
_start:
         MOV      r4,#1       // r4=1
1:                            // Local label
         ADD      r4,r4,#1    // Increment r4
         CMP      r4,#0x5     // if r4 < 5...
         BLT      1b          // ...branch backwards to local label "1"
         BL          1f          // branch forwards to local label "1"
         nop
         nop
         nop
1:
 

标签：r4,local,labels,label,start,branch,nop,ARM
来源： https://www.cnblogs.com/dream397/p/15682190.html