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

This commit is contained in:
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>
* armemu.h (NEGBRANCH): Do not overwrite the two most significant

7
sim/arm/armemu.c
View File

@ -3871,10 +3871,9 @@ MultiplyAdd64 (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));
}
return scount + 1; /* extra cycle for addition */