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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>
This commit is contained in:
Mike Frysinger 2011-06-18 19:44:14 +00:00
parent ef26d60eba
commit f2a56d0ad7
2 changed files with 10 additions and 0 deletions
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6
sim/bfin/ChangeLog
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@ -1,3 +1,9 @@
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

4
sim/bfin/bfin-sim.c
View File

@ -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: