diff options
Diffstat (limited to 'sim/msp430/msp430-sim.c')
| -rw-r--r-- | sim/msp430/msp430-sim.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sim/msp430/msp430-sim.c b/sim/msp430/msp430-sim.c index cdb8eab71ff..e21c8cf6a64 100644 --- a/sim/msp430/msp430-sim.c +++ b/sim/msp430/msp430-sim.c @@ -1292,8 +1292,10 @@ msp430_step_once (SIM_DESC sd) u1 = SRC; carry_to_use = u1 & 1; uresult = u1 >> 1; - if (SR & MSP430_FLAG_C) - uresult |= (1 << (opcode->size - 1)); + /* If the ZC bit of the opcode is set, it means we are synthesizing + RRUX, so the carry bit must be ignored. */ + if (opcode->zc == 0 && (SR & MSP430_FLAG_C)) + uresult |= (1 << (opcode->size - 1)); TRACE_ALU (MSP430_CPU (sd), "RRC: %#x >>= %#x", u1, uresult); DEST (uresult); |