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authorMike Frysinger <vapier@gentoo.org>2011-06-18 19:44:14 +0000
committerMike Frysinger <vapier@gentoo.org>2011-06-18 19:44:14 +0000
commitf2a56d0ad70bc43ea8c56272ea1d5261b2028cb5 (patch)
tree7c1e1e97bb4ca5a2399bb7c47ef0d9ef057426eb /sim
parentef26d60eba5736240c27c545e275667bb4b0fbd1 (diff)
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sim: bfin: handle the MM flag in M_IU/M_TFU modes with dsp insns
Our handling of the M_IU/M_TFU modes are missing signed saturation when the MM flag is set, so add it to match the hardware behavior. 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/ChangeLog6
-rw-r--r--sim/bfin/bfin-sim.c4
2 files changed, 10 insertions, 0 deletions
diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index 52b75ee..4c3692f 100644
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,5 +1,11 @@
2011-06-18 Robin Getz <robin.getz@analog.com>
+ * bfin-sim.c (extract_mult): Call saturate_s32 when MM is set
+ and mmod is M_IU. Call saturate_s16 when MM is set and mmod
+ is M_TFU.
+
+2011-06-18 Robin Getz <robin.getz@analog.com>
+
* bfin-sim.c (decode_multfunc): Call new is_macmod_signed, and
allow MM to sign extend all the time.
(decode_macfunc): Likewise. Drop sign extension of unsigned
diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c
index 017ddca..71fda3e 100644
--- a/sim/bfin/bfin-sim.c
+++ b/sim/bfin/bfin-sim.c
@@ -1516,6 +1516,8 @@ extract_mult (SIM_CPU *cpu, bu64 res, int mmod, int MM,
case M_IS:
return saturate_s32 (res, overflow);
case M_IU:
+ if (MM)
+ return saturate_s32 (res, overflow);
return saturate_u32 (res, overflow);
case M_FU:
if (MM)
@@ -1559,6 +1561,8 @@ extract_mult (SIM_CPU *cpu, bu64 res, int mmod, int MM,
case M_T:
return saturate_s16 (trunc16 (res), overflow);
case M_TFU:
+ if (MM)
+ return saturate_s16 (trunc16 (res), overflow);
return saturate_u16 (trunc16 (res), overflow);
case M_S2RND: