Introduce Cactus options for vectorisation

Introduce configuration-time options for vectorisation, including
options to allow architecture-specific choices that may influence
performance.

Introduce "middle" masked stores for large vector sizes and small
loops.

Clean up and simplify some of the implementation code.


git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/Vectors/trunk@10 105869f7-3296-0410-a4ea-f4349344b45a

1 files changed, 123 insertions, 0 deletions

diff --git a/configure.sh b/configure.sh
new file mode 100644
index 0000000..85a6e26
--- /dev/null
+++ b/configure.sh
@@ -0,0 +1,123 @@
+#! /bin/bash
+
+# Set up shell
+set -x                          # Output commands
+set -e                          # Abort on errors
+
+
+
+################################################################################
+# Examine settings
+################################################################################
+
+
+
+case $(echo "x$VECTORISE" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE=1 ;;
+    (xno)  VECTORISE=0 ;;
+    (x)    VECTORISE=0 ;;        # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE"
+           echo "END ERROR"
+           exit 1;;
+esac
+
+# Disable vectorisation when optimisation is disabled. (The
+# vectorisation macros depend on optimisation for efficient code;
+# without optimisation, the code is most likely much slower than
+# usual.)
+case $(echo "x$OPTIMISE" | tr '[:upper:]' '[:lower:]') in
+    (xyes) ;;                   # do nothing
+    (xno)  VECTORISE=0 ;;       # disable vectorisation
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option CCTK_OPTIMISE_MODE"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_ALIGNED_ARRAYS" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_ALIGNED_ARRAYS=1 ;;
+    (xno)  VECTORISE_ALIGNED_ARRAYS=0 ;;
+    (x)    VECTORISE_ALIGNED_ARRAYS=0 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_ALIGNED_ARRAYS"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_ALWAYS_USE_UNALIGNED_LOADS" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_ALWAYS_USE_UNALIGNED_LOADS=1 ;;
+    (xno)  VECTORISE_ALWAYS_USE_UNALIGNED_LOADS=0 ;;
+    (x)    VECTORISE_ALWAYS_USE_UNALIGNED_LOADS=0 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_ALWAYS_USE_UNALIGNED_LOADS"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_ALWAYS_USE_ALIGNED_LOADS" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_ALWAYS_USE_ALIGNED_LOADS=1 ;;
+    (xno)  VECTORISE_ALWAYS_USE_ALIGNED_LOADS=0 ;;
+    (x)    VECTORISE_ALWAYS_USE_ALIGNED_LOADS=0 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_ALWAYS_USE_ALIGNED_LOADS"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_STREAMING_STORES" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_STREAMING_STORES=1 ;;
+    (xno)  VECTORISE_STREAMING_STORES=0 ;;
+    (x)    VECTORISE_STREAMING_STORES=1 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_STREAMING_STORES"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_INLINE" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_INLINE=1 ;;
+    (xno)  VECTORISE_INLINE=0 ;;
+    (x)    VECTORISE_INLINE=1 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_INLINE"
+           echo "END ERROR"
+           exit 1
+esac
+
+case $(echo "x$VECTORISE_EMULATE_AVX" | tr '[:upper:]' '[:lower:]') in
+    (xyes) VECTORISE_EMULATE_AVX=1 ;;
+    (xno)  VECTORISE_EMULATE_AVX=0 ;;
+    (x)    VECTORISE_EMULATE_AVX=0 ;; # default
+    (*)    echo "BEGIN ERROR"
+           echo "Illegal value of option VECTORISE_EMULATE_AVX"
+           echo "END ERROR"
+           exit 1
+esac
+
+
+
+################################################################################
+# Configure Cactus
+################################################################################
+
+# Pass options to Cactus
+echo "BEGIN DEFINE"
+echo "VECTORISE                            $VECTORISE"
+echo "VECTORISE_ALIGNED_ARRAYS             $VECTORISE_ALIGNED_ARRAYS"
+echo "VECTORISE_ALWAYS_USE_UNALIGNED_LOADS $VECTORISE_ALWAYS_USE_UNALIGNED_LOADS"
+echo "VECTORISE_ALWAYS_USE_ALIGNED_LOADS   $VECTORISE_ALWAYS_USE_ALIGNED_LOADS"
+echo "VECTORISE_INLINE                     $VECTORISE_INLINE"
+echo "VECTORISE_STREAMING_STORES           $VECTORISE_STREAMING_STORES"
+echo "VECTORISE_EMULATE_AVX                $VECTORISE_EMULATE_AVX"
+echo "END DEFINE"
+
+echo "BEGIN MAKE_DEFINITION"
+echo "VECTORISE                            = $VECTORISE"
+echo "VECTORISE_ALIGNED_ARRAYS             = $VECTORISE_ALIGNED_ARRAYS"
+echo "VECTORISE_ALWAYS_USE_UNALIGNED_LOADS = $VECTORISE_ALWAYS_USE_UNALIGNED_LOADS"
+echo "VECTORISE_ALWAYS_USE_ALIGNED_LOADS   = $VECTORISE_ALWAYS_USE_ALIGNED_LOADS"
+echo "VECTORISE_INLINE                     = $VECTORISE_INLINE"
+echo "VECTORISE_STREAMING_STORES           = $VECTORISE_STREAMING_STORES"
+echo "VECTORISE_EMULATE_AVX                = $VECTORISE_EMULATE_AVX"
+echo "END MAKE_DEFINITION"