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authorAlexandre Oliva <aoliva@redhat.com>2000-06-22 20:42:34 +0000
committerAlexandre Oliva <aoliva@redhat.com>2000-06-22 20:42:34 +0000
commitf9c22bc3a4d6ae79f94ff339404fc0037b065589 (patch)
tree6bbf648b2a6eb81a68350ae9c3f59c5f3bde5432 /sim
parentee9a777240baf90e8c9714963fb791884162048c (diff)
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* armemu.c (Multiply64): Fix computation of flag N.
Diffstat (limited to 'sim')
-rw-r--r--sim/arm/ChangeLog2
-rw-r--r--sim/arm/armemu.c7
2 files changed, 5 insertions, 4 deletions
diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index 4780f0a..c0990c7 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,5 +1,7 @@
2000-06-22 Alexandre Oliva <aoliva@cygnus.com>
+ * armemu.c (Multiply64): Fix computation of flag N.
+
* armemu.c (MultiplyAdd64): Fix computation of flag N.
2000-06-20 Alexandre Oliva <aoliva@cygnus.com>
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