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2009-12-14 Maxim Kuvyrkov <maxim@codesourcery.com>

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* libc/machine/m68k/memcpy.S: Patch to support
        boards which do not support unaligned read/write.
This commit is contained in:
Jeff Johnston 2009-12-14 20:50:53 +00:00
parent a3bb10f356
commit 531e23564b
2 changed files with 21 additions and 0 deletions
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5
newlib/ChangeLog
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@ -1,3 +1,8 @@
2009-12-14 Maxim Kuvyrkov <maxim@codesourcery.com>
* libc/machine/m68k/memcpy.S: Patch to support
boards which do not support unaligned read/write.
2009-12-10 Conny Marco Menebrocker <c-m-m@gmx.de>
* configure.host: Add xc16x support.

16
newlib/libc/machine/m68k/memcpy.S
View File

@ -15,6 +15,12 @@
#include "m68kasm.h"
#if defined (__mcoldfire__) || defined (__mcpu32__) || defined (__mc68010__) || defined (__mc68020__) || defined (__mc68030__) || defined (__mc68040__) || defined (__mc68060__)
# define MISALIGNED_OK 1
#else
# define MISALIGNED_OK 0
#endif
.text
.align 4
@ -40,6 +46,15 @@ SYM(memcpy):
cmp.l #8,d1 | if fewer than 8 bytes to transfer,
blo .Lresidue | do not optimise
#if !MISALIGNED_OK
/* Goto .Lresidue if either dest or src is not 4-byte aligned */
move.l a0,d0
and.l #3,d0
bne .Lresidue
move.l a1,d0
and.l #3,d0
bne .Lresidue
#else /* MISALIGNED_OK */
/* align dest */
move.l a0,d0 | copy of dest
neg.l d0
@ -54,6 +69,7 @@ SYM(memcpy):
bcc 2f
move.w (a1)+,(a0)+
2:
#endif /* !MISALIGNED_OK */
/* long word transfers */
move.l d1,d0