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authorMike Frysinger <vapier@gentoo.org>2011-03-15 20:10:12 +0000
committerMike Frysinger <vapier@gentoo.org>2011-03-15 20:10:12 +0000
commite3809a37d45651f2a08be03dda0b48275a6e04d8 (patch)
tree073bf21bd375759adfce4bf8a7ada4a1d6680ad0 /sim
parent86d3d8de687fda121bd8d12a9d0e9f00e7284bf1 (diff)
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sim: bfin: skip acc/ASTAT updates for moves
No point in moving unchanged acc values to the acc regs, and avoid updating the acc ASTAT bits when only reading. This fixes incorrect changing of the ASTAT bits when they're only being read. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'sim')
-rw-r--r--sim/bfin/ChangeLog4
-rw-r--r--sim/bfin/bfin-sim.c12
2 files changed, 10 insertions, 6 deletions
diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index 45bf0a8..deaf615 100644
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,5 +1,9 @@
2011-03-15 Robin Getz <robin.getz@analog.com>
+ * bfin-sim.c (decode_macfunc): Move acc STOREs behind op != 3 check.
+
+2011-03-15 Robin Getz <robin.getz@analog.com>
+
* bfin-sim.c (decode_macfunc): New neg parameter. Set when the
high bit is set after extract_mult.
(decode_dsp32mac_0): Declare n_1 and n_0. Pass to the decode_macfunc
diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c
index ba0e0c2..14cf41a 100644
--- a/sim/bfin/bfin-sim.c
+++ b/sim/bfin/bfin-sim.c
@@ -1662,13 +1662,13 @@ decode_macfunc (SIM_CPU *cpu, int which, int op, int h0, int h1, int src0,
if (acc & 0x8000000000ull)
*neg = 1;
- }
- STORE (AXREG (which), (acc >> 32) & 0xff);
- STORE (AWREG (which), acc & 0xffffffff);
- STORE (ASTATREG (av[which]), sat);
- if (sat)
- STORE (ASTATREG (avs[which]), sat);
+ STORE (AXREG (which), (acc >> 32) & 0xff);
+ STORE (AWREG (which), acc & 0xffffffff);
+ STORE (ASTATREG (av[which]), sat);
+ if (sat)
+ STORE (ASTATREG (avs[which]), sat);
+ }
ret = extract_mult (cpu, acc, mmod, MM, fullword, overflow);