diff options
| author | Jeff Johnston <jjohnstn@redhat.com> | 2009-12-14 23:50:53 +0300 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2009-12-14 23:50:53 +0300 |
| commit | 531e23564b82e2b80121c7f92b47b37a31938e50 (patch) | |
| tree | aa52a6598be97ef3a471bcb8728b1afb2f6c9c35 /newlib | |
| parent | a3bb10f35691cb7cb23f2c2f3fff19c6df20116a (diff) | |
2009-12-14 Maxim Kuvyrkov <maxim@codesourcery.com>
* libc/machine/m68k/memcpy.S: Patch to support
boards which do not support unaligned read/write.
Diffstat (limited to 'newlib')
| -rw-r--r-- | newlib/ChangeLog | 5 | ||||
| -rw-r--r-- | newlib/libc/machine/m68k/memcpy.S | 16 |
2 files changed, 21 insertions, 0 deletions
diff --git a/newlib/ChangeLog b/newlib/ChangeLog index c0b1a52f5..5f0bac989 100644 --- a/newlib/ChangeLog +++ b/newlib/ChangeLog @@ -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. diff --git a/newlib/libc/machine/m68k/memcpy.S b/newlib/libc/machine/m68k/memcpy.S index 3badd58bf..e3df0037e 100644 --- a/newlib/libc/machine/m68k/memcpy.S +++ b/newlib/libc/machine/m68k/memcpy.S @@ -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 |