Allowing modern GPU configrations to properly run PTXPLUS.

There are several problems with this:

1) To get proper occupancy, based on register file usage, you must querry ptxas with
   the sm version that corresponds to the register usage in the config file. To enable this,
   a new config option has been added that determines what sm version you pass to ptxas to compute reg-usage.
   This configuration option is always required in the gpgpusim.config file
2) If you are running PTXPLUS with a modern card (i.e. volta/pascal), you need ptxas from CUDA 9.1.
   However since PTXPLUS only supports sm_13 - you need a version of CUDA where cudaobjectdump
   supports sm_1x. This ended at CUDA 5 - and PTXPLUS requires CUDA 4.2. Therefore, to run PTXPLUS
   on a modern card, you need CUDA 4.2 + modern CUDA installed. To fascilitate this, a new envronment
   varaible is added and the setup envrionment script prints an appropraite warning if you are using a newer CUDA.

We have tried to make this as fail-proof as possible - and die appropraitely when something is wrong.

1 files changed, 13 insertions, 0 deletions

diff --git a/setup_environment b/setup_environment
index 3f2476e..939fb85 100644
--- a/setup_environment
+++ b/setup_environment
@@ -53,6 +53,8 @@ if [ $CUDA_VERSION_NUMBER -gt 9100 -o $CUDA_VERSION_NUMBER -lt 2030  ]; then
 	return
 fi
 
+
+
 if [ $# = '1' ] ;
 then
     export GPGPUSIM_CONFIG=gcc-$CC_VERSION/cuda-$CUDA_VERSION_NUMBER/$1
@@ -134,4 +136,15 @@ fi
 
 echo "setup_environment succeeded";
 
+if [ $CUDA_VERSION_NUMBER -gt 4200 ]; then
+    echo ""
+    echo "----------------------------------------------------------------------------"
+    echo "WARNING - If you only care about PTX execution, ignore this warning.";
+    echo "If you are using PTXPLUS, only sm_13 is supported and it requires that the app binaries are compiled in CUDA 4.2 or less.";
+    echo "New versions of CUDA tools have dropped parsing support for sm_1x - therefore to use PTXPLUS with a modern card configuration, you must";
+    echo "have both CUDA 4.2 and a modern CUDA installed. When running PTXPLUS under a CUDA version >= 4.2, the simulator will fail unless \$CUDA_42_INSTALL_PATH";
+    echo "has been set properly. You must set this manually.";
+    echo "----------------------------------------------------------------------------"
+fi
+
 export GPGPUSIM_SETUP_ENVIRONMENT_WAS_RUN=1