Add configury for mips-lsi-elf target (32 bit MIPS16).

Fix numerous problems with PENDING_* code.
In old gencode simulator, don't double tick each cycle.
Add BREAK instruction to MIPS16 gencode simulator.

7 files changed, 135 insertions, 84 deletions

diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index baee5ec..4176bd5 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,29 @@
+Sat Nov  7 09:54:38 1998  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* gencode.c (build_instruction - BREAK): For MIPS16, handle BREAK
+ 	insn as a debug breakpoint.
+
+	* sim-main.h (PENDING_SLOT_BIT): Fix, was incorrectly defined as
+ 	pending.slot_size.
+	(PENDING_SCHED): Clean up trace statement.
+	(PENDING_SCHED): Increment PENDING_IN and PENDING_TOTAL.
+	(PENDING_FILL): Delay write by only one cycle.
+	(PENDING_FILL): For FSRs, write fmt_uninterpreted to FPR_STATE.
+
+	* sim-main.c (pending_tick): Clean up trace statements. Add trace
+ 	of pending writes.
+	(pending_tick): Fix sizes in switch statements, 4 & 8 instead of
+ 	32 & 64.
+	(pending_tick): Move incrementing of index to FOR statement.
+	(pending_tick): Only update PENDING_OUT after a write has occured.
+	
+	* configure.in: Add explicit mips-lsi-* target.  Use gencode to
+ 	build simulator.
+	* configure: Re-generate.
+	
+	* interp.c (sim_engine_run OLD): Delete explicit call to
+ 	PENDING_TICK. Now called via ENGINE_ISSUE_PREFIX_HOOK.
+	
 start-sanitize-r5900
 Wed Nov 11 16:53:57 1998  Andrew Cagney  <cagney@b1.cygnus.com>
 
diff --git a/sim/mips/configure b/sim/mips/configure
index a26b818..706514d 100755
--- a/sim/mips/configure
+++ b/sim/mips/configure
@@ -3948,15 +3948,9 @@ case "${target}" in
 			sim_igen_machine="-M vr5000,vr5400 -G gen-multi-sim=vr5000"
 # end-sanitize-cygnus
 			;;
-mips64vr4100-*-*)       echo "NOTE: mips64vr4100 still uses gencode"
-			sim_default_gen=M16
-			 sim_igen_machine="-M tx19"
-			 sim_m16_machine="-M tx19"
-	                 sim_igen_filter = "32,64,f"
-	                 sim_m16_filter = "16"
-                         sim_use_gen=NO
+  mips64vr4100-*-*)     echo "NOTE: mips64vr4100 still uses gencode"
+                        sim_use_gen=NO
                         ;;
-         
   mips64*-*-*)		sim_default_gen=IGEN
 			sim_igen_filter="32,64,f"
 			sim_use_gen=IGEN
@@ -3966,6 +3960,10 @@ mips64vr4100-*-*)       echo "NOTE: mips64vr4100 still uses gencode"
 			sim_m16_filter="16"
 			sim_use_igen=NO
 			;;
+  mips-lsi-*)	        echo "NOTE: mips-lsi-elf still uses gencode"
+                        sim_use_gen=NO
+                        ;;
+         
   mips*-*-*)		sim_default_gen=IGEN
 			sim_igen_filter="32,f"
 			sim_use_gen=IGEN
@@ -4107,7 +4105,7 @@ esac
 # Uses ac_ vars as temps to allow command line to override cache and checks.
 # --without-x overrides everything else, but does not touch the cache.
 echo $ac_n "checking for X""... $ac_c" 1>&6
-echo "configure:4111: checking for X" >&5
+echo "configure:4109: checking for X" >&5
 
 # Check whether --with-x or --without-x was given.
 if test "${with_x+set}" = set; then
@@ -4169,12 +4167,12 @@ if test "$ac_x_includes" = NO; then
 
   # First, try using that file with no special directory specified.
 cat > conftest.$ac_ext <<EOF
-#line 4173 "configure"
+#line 4171 "configure"
 #include "confdefs.h"
 #include <$x_direct_test_include>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4178: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4176: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -4243,14 +4241,14 @@ if test "$ac_x_libraries" = NO; then
   ac_save_LIBS="$LIBS"
   LIBS="-l$x_direct_test_library $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4247 "configure"
+#line 4245 "configure"
 #include "confdefs.h"
 
 int main() {
 ${x_direct_test_function}()
 ; return 0; }
 EOF
-if { (eval echo configure:4254: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4252: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   LIBS="$ac_save_LIBS"
 # We can link X programs with no special library path.
@@ -4364,7 +4362,7 @@ then
 # Uses ac_ vars as temps to allow command line to override cache and checks.
 # --without-x overrides everything else, but does not touch the cache.
 echo $ac_n "checking for X""... $ac_c" 1>&6
-echo "configure:4368: checking for X" >&5
+echo "configure:4366: checking for X" >&5
 
 # Check whether --with-x or --without-x was given.
 if test "${with_x+set}" = set; then
@@ -4426,12 +4424,12 @@ if test "$ac_x_includes" = NO; then
 
   # First, try using that file with no special directory specified.
 cat > conftest.$ac_ext <<EOF
-#line 4430 "configure"
+#line 4428 "configure"
 #include "confdefs.h"
 #include <$x_direct_test_include>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4435: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4433: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -4500,14 +4498,14 @@ if test "$ac_x_libraries" = NO; then
   ac_save_LIBS="$LIBS"
   LIBS="-l$x_direct_test_library $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4504 "configure"
+#line 4502 "configure"
 #include "confdefs.h"
 
 int main() {
 ${x_direct_test_function}()
 ; return 0; }
 EOF
-if { (eval echo configure:4511: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4509: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   LIBS="$ac_save_LIBS"
 # We can link X programs with no special library path.
@@ -4597,12 +4595,12 @@ fi
   if test "$no_x" = ""; then
       if test "$x_includes" = ""; then
   	cat > conftest.$ac_ext <<EOF
-#line 4601 "configure"
+#line 4599 "configure"
 #include "confdefs.h"
 #include <X11/XIntrinsic.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4606: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4604: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   :
@@ -4622,15 +4620,15 @@ rm -f conftest*
   fi
   if test "$no_x" = "yes" -o "$not_really_there" = "yes"; then
       echo $ac_n "checking for X11 header files""... $ac_c" 1>&6
-echo "configure:4626: checking for X11 header files" >&5
+echo "configure:4624: checking for X11 header files" >&5
       XINCLUDES="# no special path needed"
       cat > conftest.$ac_ext <<EOF
-#line 4629 "configure"
+#line 4627 "configure"
 #include "confdefs.h"
 #include <X11/Intrinsic.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4634: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4632: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   :
@@ -4666,7 +4664,7 @@ rm -f conftest*
   
   if test "$no_x" = yes; then
       echo $ac_n "checking for X11 libraries""... $ac_c" 1>&6
-echo "configure:4670: checking for X11 libraries" >&5
+echo "configure:4668: checking for X11 libraries" >&5
       XLIBSW=nope
       dirs="/usr/unsupported/lib /usr/local/lib /usr/X386/lib /usr/X11R6/lib /usr/X11R5/lib /usr/lib/X11R5 /usr/lib/X11R4 /usr/lib/X11 /usr/openwin/lib /usr/X11/lib /usr/sww/X11/lib"
       for i in $dirs ; do
@@ -4686,7 +4684,7 @@ echo "configure:4670: checking for X11 libraries" >&5
   fi
   if test "$XLIBSW" = nope ; then
       echo $ac_n "checking for XCreateWindow in -lXwindow""... $ac_c" 1>&6
-echo "configure:4690: checking for XCreateWindow in -lXwindow" >&5
+echo "configure:4688: checking for XCreateWindow in -lXwindow" >&5
 ac_lib_var=`echo Xwindow'_'XCreateWindow | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4694,7 +4692,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lXwindow  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4698 "configure"
+#line 4696 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4705,7 +4703,7 @@ int main() {
 XCreateWindow()
 ; return 0; }
 EOF
-if { (eval echo configure:4709: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4707: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4821,7 +4819,7 @@ fi
   #--------------------------------------------------------------------
   
   echo $ac_n "checking for main in -lXbsd""... $ac_c" 1>&6
-echo "configure:4825: checking for main in -lXbsd" >&5
+echo "configure:4823: checking for main in -lXbsd" >&5
 ac_lib_var=`echo Xbsd'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4829,14 +4827,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lXbsd  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4833 "configure"
+#line 4831 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4840: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4838: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4860,7 +4858,7 @@ fi
   # CYGNUS LOCAL: Store any socket library(ies) in the cache, and don't
   # mess up the cache values of the functions we check for.
   echo $ac_n "checking for socket libraries""... $ac_c" 1>&6
-echo "configure:4864: checking for socket libraries" >&5
+echo "configure:4862: checking for socket libraries" >&5
 if eval "test \"`echo '$''{'sim_cv_lib_sockets'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4868,12 +4866,12 @@ else
     sim_checkBoth=0
     unset ac_cv_func_connect
     echo $ac_n "checking for connect""... $ac_c" 1>&6
-echo "configure:4872: checking for connect" >&5
+echo "configure:4870: checking for connect" >&5
 if eval "test \"`echo '$''{'ac_cv_func_connect'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4877 "configure"
+#line 4875 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char connect(); below.  */
@@ -4896,7 +4894,7 @@ connect();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4900: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4898: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_connect=yes"
 else
@@ -4919,7 +4917,7 @@ fi
     if test "$sim_checkSocket" = 1; then
         unset ac_cv_func_connect
         echo $ac_n "checking for main in -lsocket""... $ac_c" 1>&6
-echo "configure:4923: checking for main in -lsocket" >&5
+echo "configure:4921: checking for main in -lsocket" >&5
 ac_lib_var=`echo socket'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4927,14 +4925,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4931 "configure"
+#line 4929 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4938: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4936: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4961,12 +4959,12 @@ fi
         SOCKLIBSW="$SOCKLIBSW -lsocket -lnsl"
         unset ac_cv_func_accept
         echo $ac_n "checking for accept""... $ac_c" 1>&6
-echo "configure:4965: checking for accept" >&5
+echo "configure:4963: checking for accept" >&5
 if eval "test \"`echo '$''{'ac_cv_func_accept'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4970 "configure"
+#line 4968 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char accept(); below.  */
@@ -4989,7 +4987,7 @@ accept();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4993: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4991: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_accept=yes"
 else
@@ -5016,12 +5014,12 @@ fi
     sim_oldLibs=$SOCKLIBSW
     SOCKLIBSW="$SOCKLIBSW $sim_cv_lib_sockets"
     echo $ac_n "checking for gethostbyname""... $ac_c" 1>&6
-echo "configure:5020: checking for gethostbyname" >&5
+echo "configure:5018: checking for gethostbyname" >&5
 if eval "test \"`echo '$''{'ac_cv_func_gethostbyname'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5025 "configure"
+#line 5023 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char gethostbyname(); below.  */
@@ -5044,7 +5042,7 @@ gethostbyname();
 
 ; return 0; }
 EOF
-if { (eval echo configure:5048: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5046: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_gethostbyname=yes"
 else
@@ -5062,7 +5060,7 @@ if eval "test \"`echo '$ac_cv_func_'gethostbyname`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for main in -lnsl""... $ac_c" 1>&6
-echo "configure:5066: checking for main in -lnsl" >&5
+echo "configure:5064: checking for main in -lnsl" >&5
 ac_lib_var=`echo nsl'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -5070,14 +5068,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lnsl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 5074 "configure"
+#line 5072 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:5081: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5079: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -5137,17 +5135,17 @@ for ac_hdr in string.h strings.h stdlib.h stdlib.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:5141: checking for $ac_hdr" >&5
+echo "configure:5139: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5146 "configure"
+#line 5144 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5151: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5149: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5174,7 +5172,7 @@ fi
 done
 
 echo $ac_n "checking for fabs in -lm""... $ac_c" 1>&6
-echo "configure:5178: checking for fabs in -lm" >&5
+echo "configure:5176: checking for fabs in -lm" >&5
 ac_lib_var=`echo m'_'fabs | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -5182,7 +5180,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lm  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 5186 "configure"
+#line 5184 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -5193,7 +5191,7 @@ int main() {
 fabs()
 ; return 0; }
 EOF
-if { (eval echo configure:5197: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5195: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -5223,12 +5221,12 @@ fi
 for ac_func in aint anint sqrt
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:5227: checking for $ac_func" >&5
+echo "configure:5225: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5232 "configure"
+#line 5230 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -5251,7 +5249,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:5255: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5253: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
diff --git a/sim/mips/configure.in b/sim/mips/configure.in
index 68d6873..d22a304 100644
--- a/sim/mips/configure.in
+++ b/sim/mips/configure.in
@@ -187,15 +187,9 @@ case "${target}" in
 			sim_igen_machine="-M vr5000,vr5400 -G gen-multi-sim=vr5000"
 # end-sanitize-cygnus
 			;;
-mips64vr4100-*-*)       echo "NOTE: mips64vr4100 still uses gencode"
-			sim_default_gen=M16
-			 sim_igen_machine="-M tx19"
-			 sim_m16_machine="-M tx19"
-	                 sim_igen_filter = "32,64,f"
-	                 sim_m16_filter = "16"
-                         sim_use_gen=NO
+  mips64vr4100-*-*)     echo "NOTE: mips64vr4100 still uses gencode"
+                        sim_use_gen=NO
                         ;;
-         
   mips64*-*-*)		sim_default_gen=IGEN
 			sim_igen_filter="32,64,f"
 			sim_use_gen=IGEN
@@ -205,6 +199,10 @@ mips64vr4100-*-*)       echo "NOTE: mips64vr4100 still uses gencode"
 			sim_m16_filter="16"
 			sim_use_igen=NO
 			;;
+  mips-lsi-*)	        echo "NOTE: mips-lsi-elf still uses gencode"
+                        sim_use_gen=NO
+                        ;;
+         
   mips*-*-*)		sim_default_gen=IGEN
 			sim_igen_filter="32,f"
 			sim_use_gen=IGEN
diff --git a/sim/mips/gencode.c b/sim/mips/gencode.c
index 2e5ed28..ca0dad3 100644
--- a/sim/mips/gencode.c
+++ b/sim/mips/gencode.c
@@ -2717,6 +2717,15 @@ build_instruction (doisa, features, mips16, insn)
 
     case BREAK:
 
+      if (mips16)
+	{
+	  printf("        if (STATE & simDELAYSLOT)\n");
+	  printf("          PC = cia - 2; /* reference the branch instruction */\n");
+	  printf("        else\n");
+	  printf("          PC = cia;\n");
+	  printf("        sim_engine_halt (SD, CPU, NULL, cia, sim_stopped, SIM_SIGTRAP);\n");
+	  break;
+	}
      printf("    unsigned int break_code = instruction & HALT_INSTRUCTION_MASK;\n");
      printf("    if (   break_code == (HALT_INSTRUCTION  & HALT_INSTRUCTION_MASK)\n");
      printf("        || break_code == (HALT_INSTRUCTION2 & HALT_INSTRUCTION_MASK))\n");
diff --git a/sim/mips/interp.c b/sim/mips/interp.c
index ba3d6e5..f2db125 100644
--- a/sim/mips/interp.c
+++ b/sim/mips/interp.c
@@ -4277,9 +4277,6 @@ sim_engine_run (sd, next_cpu_nr, nr_cpus, siggnal)
       CANCELDELAYSLOT();
     }
 
-    if (MIPSISA < 4)
-      PENDING_TICK();
-
 #if !defined(FASTSIM)
     if (sim_events_tickn (sd, pipeline_count))
       {
diff --git a/sim/mips/sim-main.c b/sim/mips/sim-main.c
index 9e2ea40..f82b182 100644
--- a/sim/mips/sim-main.c
+++ b/sim/mips/sim-main.c
@@ -791,7 +791,7 @@ pending_tick (SIM_DESC SD,
 	      address_word cia)
 {
   if (PENDING_TRACE)							
-    sim_io_printf (SD, "PENDING_DRAIN - pending_in = %d, pending_out = %d, pending_total = %d\n", PENDING_IN, PENDING_OUT, PENDING_TOTAL); 
+    sim_io_eprintf (SD, "PENDING_DRAIN - 0x%lx - pending_in = %d, pending_out = %d, pending_total = %d\n", (unsigned long) cia, PENDING_IN, PENDING_OUT, PENDING_TOTAL); 
   if (PENDING_OUT != PENDING_IN)					
     {									
       int loop;							
@@ -799,17 +799,26 @@ pending_tick (SIM_DESC SD,
       int total = PENDING_TOTAL;					
       if (PENDING_TOTAL == 0)						
 	sim_engine_abort (SD, CPU, cia, "PENDING_DRAIN - Mis-match on pending update pointers\n"); 
-      for (loop = 0; (loop < total); loop++)				
+      for (loop = 0, index = PENDING_OUT;
+	   (loop < total);
+	   loop++, index = (index + 1) % PSLOTS)
 	{								
 	  if (PENDING_SLOT_DEST[index] != NULL)			
 	    {								
 	      PENDING_SLOT_DELAY[index] -= 1;				
 	      if (PENDING_SLOT_DELAY[index] == 0)			
 		{							
+		  if (PENDING_TRACE)
+		    sim_io_eprintf (SD, "PENDING_DRAIN - drained - index %d, dest 0x%lx, bit %d, val 0x%lx, size %d\n",
+				    index,
+				    (unsigned long) PENDING_SLOT_DEST[index],
+				    PENDING_SLOT_BIT[index],
+				    (unsigned long) PENDING_SLOT_VALUE[index],
+				    PENDING_SLOT_SIZE[index]);
 		  if (PENDING_SLOT_BIT[index] >= 0)			
 		    switch (PENDING_SLOT_SIZE[index])                 
 		      {						
-		      case 32:					
+		      case 4:
 			if (PENDING_SLOT_VALUE[index])		
 			  *(unsigned32*)PENDING_SLOT_DEST[index] |= 	
 			    BIT32 (PENDING_SLOT_BIT[index]);		
@@ -817,7 +826,7 @@ pending_tick (SIM_DESC SD,
 			  *(unsigned32*)PENDING_SLOT_DEST[index] &= 	
 			    BIT32 (PENDING_SLOT_BIT[index]);		
 			break;					
-		      case 64:					
+		      case 8:					
 			if (PENDING_SLOT_VALUE[index])		
 			  *(unsigned64*)PENDING_SLOT_DEST[index] |= 	
 			    BIT64 (PENDING_SLOT_BIT[index]);		
@@ -825,30 +834,36 @@ pending_tick (SIM_DESC SD,
 			  *(unsigned64*)PENDING_SLOT_DEST[index] &= 	
 			    BIT64 (PENDING_SLOT_BIT[index]);		
 			break;					
-			break;					
 		      }
 		  else
 		    switch (PENDING_SLOT_SIZE[index])                 
 		      {						
-		      case 32:					
+		      case 4:					
 			*(unsigned32*)PENDING_SLOT_DEST[index] = 	
 			  PENDING_SLOT_VALUE[index];			
 			break;					
-		      case 64:					
+		      case 8:					
 			*(unsigned64*)PENDING_SLOT_DEST[index] = 	
 			  PENDING_SLOT_VALUE[index];			
 			break;					
 		      }							
+		  if (PENDING_OUT == index)
+		    {
+		      PENDING_SLOT_DEST[index] = NULL;
+		      PENDING_OUT = (PENDING_OUT + 1) % PSLOTS;
+		      PENDING_TOTAL--;
+		    }
 		}							
-	      if (PENDING_OUT == index)				
-		{							
-		  PENDING_SLOT_DEST[index] = NULL;			
-		  PENDING_OUT = (PENDING_OUT + 1) % PSLOTS;		
-		  PENDING_TOTAL--;					
-		}							
+	      else if (PENDING_TRACE && PENDING_SLOT_DELAY[index] > 0)
+		sim_io_eprintf (SD, "PENDING_DRAIN - queued - index %d, delay %d, dest 0x%lx, bit %d, val 0x%lx, size %d\n",
+				index, PENDING_SLOT_DELAY[index],
+				(unsigned long) PENDING_SLOT_DEST[index],
+				PENDING_SLOT_BIT[index],
+				(unsigned long) PENDING_SLOT_VALUE[index],
+				PENDING_SLOT_SIZE[index]);
+
 	    }								
 	}								
-      index = (index + 1) % PSLOTS;					
     }									
 }
 
diff --git a/sim/mips/sim-main.h b/sim/mips/sim-main.h
index 95b04fd..42c152c 100644
--- a/sim/mips/sim-main.h
+++ b/sim/mips/sim-main.h
@@ -449,7 +449,7 @@ typedef struct _pending_write_queue {
 #define PENDING_OUT ((CPU)->pending.out)
 #define PENDING_TOTAL ((CPU)->pending.total)
 #define PENDING_SLOT_SIZE ((CPU)->pending.slot_size)
-#define PENDING_SLOT_BIT ((CPU)->pending.slot_size)
+#define PENDING_SLOT_BIT ((CPU)->pending.slot_bit)
 #define PENDING_SLOT_DELAY ((CPU)->pending.slot_delay)
 #define PENDING_SLOT_DEST ((CPU)->pending.slot_dest)
 #define PENDING_SLOT_VALUE ((CPU)->pending.slot_value)
@@ -472,12 +472,17 @@ memset (&(CPU)->pending, 0, sizeof ((CPU)->pending))
       sim_engine_abort (SD, CPU, cia,					\
 		        "PENDING_SCHED - buffer overflow\n");		\
     if (PENDING_TRACE)							\
-      sim_io_printf (SD, "PENDING_SCHED - dest 0x%lx, val 0x%lx, pending_in %d, pending_out %d, pending_total %d\n", (unsigned long) (DEST), (unsigned long) (VAL), PENDING_IN, PENDING_OUT, PENDING_TOTAL); \
+      sim_io_eprintf (SD, "PENDING_SCHED - 0x%lx - dest 0x%lx, val 0x%lx, bit %d, size %d, pending_in %d, pending_out %d, pending_total %d\n",			\
+		      (unsigned long) cia, (unsigned long) &(DEST),	\
+		      (unsigned long) (VAL), (BIT), (int) sizeof (DEST),\
+		      PENDING_IN, PENDING_OUT, PENDING_TOTAL);		\
     PENDING_SLOT_DELAY[PENDING_IN] = (DELAY) + 1;			\
     PENDING_SLOT_DEST[PENDING_IN] = &(DEST);				\
     PENDING_SLOT_VALUE[PENDING_IN] = (VAL);				\
     PENDING_SLOT_SIZE[PENDING_IN] = sizeof (DEST);			\
     PENDING_SLOT_BIT[PENDING_IN] = (BIT);				\
+    PENDING_IN = (PENDING_IN + 1) % PSLOTS;                             \
+    PENDING_TOTAL += 1;			                                \
   } while (0)
 
 #define PENDING_WRITE(DEST,VAL,DELAY) PENDING_SCHED(DEST,VAL,DELAY,-1)
@@ -492,9 +497,12 @@ memset (&(CPU)->pending, 0, sizeof ((CPU)->pending))
 #define PENDING_FILL(R,VAL) 						\
 {									\
   if ((R) >= FGRIDX && (R) < FGRIDX + NR_FGR)				\
-    PENDING_SCHED(FGR[(R) - FGRIDX], VAL, 2, -1);			\
+    {									\
+      PENDING_SCHED(FGR[(R) - FGRIDX], VAL, 1, -1);			\
+      PENDING_SCHED(FPR_STATE[(R) - FGRIDX], fmt_uninterpreted, 1, -1);	\
+    }									\
   else									\
-    PENDING_SCHED(GPR[(R)], VAL, 2, -1);				\
+    PENDING_SCHED(GPR[(R)], VAL, 1, -1);				\
 }