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* armemu.c (MultiplyAdd64): Fix computation of flag N.

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Alexandre Oliva
2000-06-22 20:03:32 +00:00
parent 6d5be9157e
commit ee9a777240
2 changed files with 7 additions and 4 deletions
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4
sim/arm/ChangeLog
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@ -1,3 +1,7 @@
2000-06-22 Alexandre Oliva <aoliva@cygnus.com>
* armemu.c (MultiplyAdd64): Fix computation of flag N.
2000-06-20 Alexandre Oliva <aoliva@cygnus.com> 2000-06-20 Alexandre Oliva <aoliva@cygnus.com>
* armemu.h (NEGBRANCH): Do not overwrite the two most significant * armemu.h (NEGBRANCH): Do not overwrite the two most significant

7
sim/arm/armemu.c
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@ -3871,10 +3871,9 @@ MultiplyAdd64 (ARMul_State * state, ARMword instr, int msigned, int scc)
if (scc) if (scc)
{ {
if ((RdHi == 0) && (RdLo == 0)) /* Ensure that both RdHi and RdLo are used to compute Z, but
ARMul_NegZero (state, RdHi); /* zero value */ don't let RdLo's sign bit make it to N. */
else ARMul_NegZero (state, RdHi | (RdLo >> 16) | (RdLo & 0xFFFF));
ARMul_NegZero (state, scc); /* non-zero value */
} }
return scount + 1; /* extra cycle for addition */ return scount + 1; /* extra cycle for addition */