* armemu.c (Multiply64): Fix computation of flag N.

diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index 4780f0a..c0990c7 100644 (file)
--- 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 (file)
--- 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