github.com/afumu/libc@v0.0.6/musl/src/string/arm/__aeabi_memcpy.s (about)

     1  .syntax unified
     2  
     3  .global __aeabi_memcpy8
     4  .global __aeabi_memcpy4
     5  .global __aeabi_memcpy
     6  .global __aeabi_memmove8
     7  .global __aeabi_memmove4
     8  .global __aeabi_memmove
     9  
    10  .type __aeabi_memcpy8,%function
    11  .type __aeabi_memcpy4,%function
    12  .type __aeabi_memcpy,%function
    13  .type __aeabi_memmove8,%function
    14  .type __aeabi_memmove4,%function
    15  .type __aeabi_memmove,%function
    16  
    17  __aeabi_memmove8:
    18  __aeabi_memmove4:
    19  __aeabi_memmove:
    20  	cmp   r0, r1
    21  	bls   3f
    22  	cmp   r2, #0
    23  	beq   2f
    24  	adds  r0, r0, r2
    25  	adds  r2, r1, r2
    26  1:	subs  r2, r2, #1
    27  	ldrb  r3, [r2]
    28  	subs  r0, r0, #1
    29  	strb  r3, [r0]
    30  	cmp   r1, r2
    31  	bne   1b
    32  2:	bx    lr
    33  __aeabi_memcpy8:
    34  __aeabi_memcpy4:
    35  __aeabi_memcpy:
    36  3:	cmp   r2, #0
    37  	beq   2f
    38  	adds  r2, r1, r2
    39  1:	ldrb  r3, [r1]
    40  	adds  r1, r1, #1
    41  	strb  r3, [r0]
    42  	adds  r0, r0, #1
    43  	cmp   r1, r2
    44  	bne   1b
    45  2:	bx    lr