This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: -mfmovd enabled by default for SH2A but not for SH4
"Naveen H.S." <naveen.hs@kpitcummins.com> wrote:
> Yes, we got this error on SH72513(SH2A) hardware. When the same code
> is run on simulator, the "address error" occurs on encountering the
> "fmov.d" instruction.
[snip]
> It is mentioned that "Double longword data accessed from other than
> double longword boundary" results in address error.
I thought that fmov.d does two long word accesses as Christian
has pointed out in his comment.
Anyway, the address error on the real hardware would suggest
that the double long word access occurs in your case.
Although one can explicitly provide his own fpscr setting as
Christian said and can use appropriate options, defaulting
-mdalign for TARGET_SH2A_DOUBLE might be more robust for users.
Could you please try the appended patch? Christian, how does
it look?
Regards,
kaz
--
* config/sh/sh.h (OVERRIDE_OPTIONS): Set MASK_ALIGN_DOUBLE
for TARGET_SH2A_DOUBLE.
--- ORIG/trunk/gcc/config/sh/sh.h 2007-12-07 09:11:38.000000000 +0900
+++ LOCAL/trunk/gcc/config/sh/sh.h 2008-02-25 19:09:48.000000000 +0900
@@ -553,7 +553,7 @@ do { \
{ \
sh_cpu = CPU_SH2A; \
if (TARGET_SH2A_DOUBLE) \
- target_flags |= MASK_FMOVD; \
+ target_flags |= MASK_FMOVD | MASK_ALIGN_DOUBLE; \
} \
if (TARGET_SH3) \
sh_cpu = CPU_SH3; \