From 73aae8efb21ca7ff1c792fe4d2c394eecc346958 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sat, 18 Jun 2011 17:27:01 +0000 Subject: [PATCH] sim: bfin: fix accumulator edge case saturation When the accumulator saturates, it needs to be greater than, but not equal to, the largest unsigned value as this is what the hardware does. Signed-off-by: Robin Getz Signed-off-by: Mike Frysinger --- sim/bfin/ChangeLog | 5 +++++ sim/bfin/bfin-sim.c | 4 ++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog index 5aab1171afe..75de6f4db4f 100644 --- a/sim/bfin/ChangeLog +++ b/sim/bfin/ChangeLog @@ -1,3 +1,8 @@ +2011-06-18 Robin Getz + + * bfin-sim.c (saturate_s40_astat): Change ">" to ">=". + (decode_macfunc): Likewise when mmod is M_IH. + 2011-06-18 Mike Frysinger * interp.c (sim_create_inferior): Change free to freeargv. diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c index 1cdfd27a352..31136a0660b 100644 --- a/sim/bfin/bfin-sim.c +++ b/sim/bfin/bfin-sim.c @@ -1398,7 +1398,7 @@ saturate_s40_astat (bu64 val, bu32 *v) *v = 1; return -((bs64)1 << 39); } - else if ((bs64)val >= ((bs64)1 << 39) - 1) + else if ((bs64)val > ((bs64)1 << 39) - 1) { *v = 1; return ((bu64)1 << 39) - 1; @@ -1645,7 +1645,7 @@ decode_macfunc (SIM_CPU *cpu, int which, int op, int h0, int h1, int src0, case M_IH: if ((bs64)acc < -0x80000000ll) acc = -0x80000000ull, sat = 1; - else if ((bs64)acc >= 0x7fffffffll) + else if ((bs64)acc > 0x7fffffffll) acc = 0x7fffffffull, sat = 1; break; case M_W32: -- 2.30.2