jnand_memmove.s

QUALCOMM JNAND DRIVER

/* GNU memmove function.  !Stolen! from the library of the arm tools. */

;         .text
;         .code	16
;         .globl	memmove
;         .globl	memcpy
;         .thumb_func
;memmove:
;         .thumb_func
;memcpy:




         EXPORT memcpy
         EXPORT memmove

         AREA FastCopyMove, CODE, READONLY

         CODE16

memmove
memcpy



         sub     r3, r0, r1
         cmp     r3, r2
         bcc     l68
         mov     ip, r0
         lsl     r3, r1, #30
         beq     l1c
lc
         sub     r2, r2, #1
         bcc     l64
         ldrb    r3, [r1, #0]
         strb    r3, [r0, #0]
         add     r0, r0, #1
         add     r1, r1, #1
         lsl     r3, r1, #30
         bne     lc
l1c
         lsl     r3, r0, #30
         bne     l50
         sub     r2, #16
         bcc     l30
         push    {r4, r5, r7}
l26
         ldmia   r1!,{r3, r4, r5, r7}
         stmia   r0!,{r3, r4, r5, r7}
         sub     r2, #16
         bcs     l26
         pop     {r4, r5, r7}
l30
         add     r2, #12
         bcc     l54
l34
         ldmia   r1!,{r3}
         stmia   r0!,{r3}
         sub     r2, r2, #4
         bcs     l34
         b       l54
l3e
         ldmia   r1!,{r3}
         strb    r3, [r0, #0]
         lsr     r3, r3, #8
         strb    r3, [r0, #1]
         lsr     r3, r3, #8
         strb    r3, [r0, #2]
         lsr     r3, r3, #8
         strb    r3, [r0, #3]
         add     r0, r0, #4
l50
         sub     r2, r2, #4
         bcs     l3e
l54
         add     r2, r2, #3
         bcc     l64
l58
         ldrb    r3, [r1, #0]
         strb    r3, [r0, #0]
         add     r1, r1, #1
         add     r0, r0, #1
         sub     r2, r2, #1
         bcs     l58
l64
         mov     r0, ip
         bx      lr
l68
         add     r3, r0, #0
         orr     r3, r1
         orr     r3, r2
         lsl     r3, r3, #30
         bne     l7c
l72
         sub     r2, r2, #4
         ldr     r3, [r1, r2]
         str     r3, [r0, r2]
         bne     l72
         bx      lr
l7c
         sub     r2, r2, #1
         ldrb    r3, [r1, r2]
         strb    r3, [r0, r2]
         bne     l7c
         bx      lr
         
         END