sys/src/libc/arm64/memset.s

   1 TEXT memset(SB), $-4
   2         MOVBU   c+8(FP), R1
   3         MOV     n+16(FP), R2
   4
   5         MOV     R0, R5
   6         ADD     R0, R2, R3
   7         BIC     $15, R2, R4
   8         CBZ     R4, _loop1
   9         ADD     R0, R4, R4
  10
  11         ORR     R1<<8, R1
  12         ORR     R1<<16, R1
  13         ORR     R1<<32, R1
  14
  15 _loop16:
  16         MOVP    R1, R1, (R5)16!
  17         CMP     R4, R5
  18         BNE     _loop16
  19
  20 _loop1:
  21         CMP     R3, R5
  22         BEQ     _done
  23
  24         MOVBU   R1, (R5)1!
  25         B       _loop1
  26
  27 _done:
  28         RETURN