diff options
Diffstat (limited to 'sim/tic80/sim-calls.c')
| -rw-r--r-- | sim/tic80/sim-calls.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sim/tic80/sim-calls.c b/sim/tic80/sim-calls.c index 3677d8c..dd54184 100644 --- a/sim/tic80/sim-calls.c +++ b/sim/tic80/sim-calls.c @@ -177,7 +177,9 @@ sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) void sim_fetch_register (SIM_DESC sd, int regnr, unsigned char *buf) { - if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM) + if (regnr == R0_REGNUM) + memset (buf, 0, sizeof (unsigned32)); + else if (regnr > R0_REGNUM && regnr <= Rn_REGNUM) *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM]); else if (regnr == PC_REGNUM) *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.ip); |