+2011-10-04 Nick Clifton <nickc@redhat.com>
+
+ * libc/machine/arm/memcpy.S: Fix unaligned access copying.
+
2011-09-29 Greta Yorsh <Greta.Yorsh@arm.com>
* libc/machine/arm/memcpy.S: New file. Contains a hand coded
#ifdef __ARM_FEATURE_UNALIGNED
/* Copy word by word using LDR when alignment can be done in hardware,
i.e., SCTLR.A is set, supporting unaligned access in LDR and STR. */
- cmp r2, #60
+ subs r2, r2, #60
blt 8f
7:
bge 7b
8:
- /* Get here if there is less than 64 btyes to copy,
- where the number of bytes to copy is r2 + 4. */
+ /* Get here if less than 64 bytes to copy, -64 <= r2 < 0.
+ Check if there is more than 3 bytes to copy. */
+ adds r2, r2, #60
+ blt copy_less_than_4
+
+9:
+ /* Get here if there is less than 64 but at least 4 bytes to copy,
+ where the number of bytes to copy is r2+4. */
ldr r3, [r1], #4
str r3, [r0], #4
subs r2, r2, #4
- bge 8b
+ bge 9b
b copy_less_than_4