diff options
Diffstat (limited to 'sim/arm/armemu.c')
| -rw-r--r-- | sim/arm/armemu.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/sim/arm/armemu.c b/sim/arm/armemu.c index 426617d..e4e963b 100644 --- a/sim/arm/armemu.c +++ b/sim/arm/armemu.c @@ -3819,10 +3819,9 @@ Multiply64 (ARMul_State * state, ARMword instr, int msigned, int scc) if (scc) { - if ((RdHi == 0) && (RdLo == 0)) - ARMul_NegZero (state, RdHi); /* zero value */ - else - ARMul_NegZero (state, scc); /* non-zero value */ + /* Ensure that both RdHi and RdLo are used to compute Z, but + don't let RdLo's sign bit make it to N. */ + ARMul_NegZero (state, RdHi | (RdLo >> 16) | (RdLo & 0xFFFF)); } /* The cycle count depends on whether the instruction is a signed or |