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sim: bfin: do not touch ASTAT[V] when shifting accumulators

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If we're shifting accumulators, we don't want to touch the V bit in
ASTAT, so add size checks to the ashiftrt/lshiftrt helpers.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2011-06-18 21:59:38 +00:00
parent d5fcd950e4
commit b4876e0485
2 changed files with 9 additions and 3 deletions
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5
sim/bfin/ChangeLog
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@ -1,3 +1,8 @@
2011-06-18 Robin Getz <robin.getz@analog.com>
* bfin-sim.c (ashiftrt): If size is 40, do not call SET_ASTATREG.
(lshiftrt): Likewise.
2011-06-18 Robin Getz <robin.getz@analog.com> 2011-06-18 Robin Getz <robin.getz@analog.com>
* bfin-sim.c (decode_dsp32shift_0): Use get_unextended_acc * bfin-sim.c (decode_dsp32shift_0): Use get_unextended_acc

7
sim/bfin/bfin-sim.c
View file

@ -713,8 +713,8 @@ ashiftrt (SIM_CPU *cpu, bu40 val, int cnt, int size)
val |= sgn; val |= sgn;
SET_ASTATREG (an, val >> (size - 1)); SET_ASTATREG (an, val >> (size - 1));
SET_ASTATREG (az, val == 0); SET_ASTATREG (az, val == 0);
/* XXX: Need to check ASTAT[v] behavior here. */ if (size != 40)
SET_ASTATREG (v, 0); SET_ASTATREG (v, 0);
return val; return val;
} }
@ -742,7 +742,8 @@ lshiftrt (SIM_CPU *cpu, bu64 val, int cnt, int size)
} }
SET_ASTATREG (an, val >> (size - 1)); SET_ASTATREG (an, val >> (size - 1));
SET_ASTATREG (az, val == 0); SET_ASTATREG (az, val == 0);
SET_ASTATREG (v, 0); if (size != 40)
SET_ASTATREG (v, 0);
return val; return val;
} }