diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2011-06-18 21:59:38 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2011-06-18 21:59:38 +0000 |
| commit | b4876e0485f5d16a5d9e213c0b15466323170cf0 (patch) | |
| tree | 889d24e356cb0cb76684c4ff53108124623310ae | |
| parent | d5fcd950e4f812deac7669190b30efd1781a1266 (diff) | |
| download | gdb-b4876e0485f5d16a5d9e213c0b15466323170cf0.zip gdb-b4876e0485f5d16a5d9e213c0b15466323170cf0.tar.gz gdb-b4876e0485f5d16a5d9e213c0b15466323170cf0.tar.bz2 | |
sim: bfin: do not touch ASTAT[V] when shifting accumulators
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>
| -rw-r--r-- | sim/bfin/ChangeLog | 5 | ||||
| -rw-r--r-- | sim/bfin/bfin-sim.c | 7 |
2 files changed, 9 insertions, 3 deletions
diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog index 4e656d7..8fd629a 100644 --- a/sim/bfin/ChangeLog +++ b/sim/bfin/ChangeLog @@ -1,5 +1,10 @@ 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> + * bfin-sim.c (decode_dsp32shift_0): Use get_unextended_acc rather than get_extended_acc in LSHIFT insns. diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c index 2c71f6c..dbfce6c 100644 --- a/sim/bfin/bfin-sim.c +++ b/sim/bfin/bfin-sim.c @@ -713,8 +713,8 @@ ashiftrt (SIM_CPU *cpu, bu40 val, int cnt, int size) val |= sgn; SET_ASTATREG (an, val >> (size - 1)); SET_ASTATREG (az, val == 0); - /* XXX: Need to check ASTAT[v] behavior here. */ - SET_ASTATREG (v, 0); + if (size != 40) + SET_ASTATREG (v, 0); return val; } @@ -742,7 +742,8 @@ lshiftrt (SIM_CPU *cpu, bu64 val, int cnt, int size) } SET_ASTATREG (an, val >> (size - 1)); SET_ASTATREG (az, val == 0); - SET_ASTATREG (v, 0); + if (size != 40) + SET_ASTATREG (v, 0); return val; } |