sim: bfin: do not extend accumulator in LSHIFT insns

The logical shift insn does not sign extend before shifting, so
we shouldn't either.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index 5033c22..4e656d7 100644 (file)
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,5 +1,10 @@
 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.
+
+2011-06-18  Robin Getz  <robin.getz@analog.com>
+
        * bfin-sim.c (decode_macfunc): Handle MM when mmod is M_TFU.
        Check MM once when mmod is M_FU to match M_TFU better.
 

diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c
index 20602b7..2c71f6c 100644 (file)
--- a/sim/bfin/bfin-sim.c
+++ b/sim/bfin/bfin-sim.c
@@ -5230,7 +5230,7 @@ decode_dsp32shift_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
 
       HLs = !!HLs;
       TRACE_INSN (cpu, "A%i = LSHIFT A%i BY R%i.L;", HLs, HLs, src0);
-      val = get_extended_acc (cpu, HLs);
+      val = get_unextended_acc (cpu, HLs);
 
       if (shft <= 0)
        val = lshiftrt (cpu, val, -shft, 40);