[Blackfin] arch: fix bug - make memcpy return the dest addr.

The memcpy() function returns the src pointer instead of the dst pointer.
This patch fix this bug.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/lib/memcpy.S b/arch/blackfin/lib/memcpy.S
index 2e6336492b4b3500e4511cd7e9a8e691aba02d3b..e654a18a0754c861f10a9fc049227060a8854cfe 100644 (file)
--- a/arch/blackfin/lib/memcpy.S
+++ b/arch/blackfin/lib/memcpy.S
@@ -70,8 +70,8 @@ ENTRY(_memcpy)
        /* Check for aligned data.*/
 
        R3 = R1 | R0;
-       R0 = 0x3;
-       R3 = R3 & R0;
+       R1 = 0x3;
+       R3 = R3 & R1;
        CC = R3;        /* low bits set on either address? */
        IF CC JUMP .Lnot_aligned;
 
@@ -83,7 +83,6 @@ ENTRY(_memcpy)
        /* less than eight bytes... */
        P2 = R2;
        LSETUP(.Lthree_start, .Lthree_end) LC0=P2;
-       R0 = R1;        /* setup src address for return */
 .Lthree_start:
        R3 = B[P1++] (X);
 .Lthree_end:
@@ -95,7 +94,6 @@ ENTRY(_memcpy)
        /* There's at least eight bytes to copy. */
        P2 += -1;       /* because we unroll one iteration */
        LSETUP(.Lword_loops, .Lword_loope) LC0=P2;
-       R0 = R1;
        I1 = P1;
        R3 = [I1++];
 #if ANOMALY_05000202
@@ -120,7 +118,6 @@ ENTRY(_memcpy)
 .Lnot_aligned:
        /* From here, we're copying byte-by-byte. */
        LSETUP (.Lbyte_start, .Lbyte_end) LC0=P2;
-       R0 = R1;        /* Save src address for return */
 .Lbyte_start:
        R1 = B[P1++] (X);
 .Lbyte_end:
@@ -135,7 +132,6 @@ ENTRY(_memcpy)
         * Don't bother to work out alignment for
         * the reverse case.
         */
-       R0 = R1;        /* save src for later. */
        P0 = P0 + P2;
        P0 += -1;
        P1 = P1 + P2;