[Beignet] [PATCH] LibOcl: Fix float convert to long/ulong bug.

[Yang Rong]

If the float overflow, convert to long/ulong is undef. So must use long/ulong's max and min value
as return value.
Also refine long to other integer type sat convert. Use to statement to avoid generate if/else/endif.

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 backend/src/libocl/script/ocl_convert.sh | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/backend/src/libocl/script/ocl_convert.sh b/backend/src/libocl/script/ocl_convert.sh
index 4f720fe..432bd41 100755
--- a/backend/src/libocl/script/ocl_convert.sh
+++ b/backend/src/libocl/script/ocl_convert.sh
@@ -161,7 +161,8 @@ else
     echo '
 #define DEF(DSTTYPE, SRCTYPE, MIN, MAX) \
 OVERLOADABLE DSTTYPE convert_ ## DSTTYPE ## _sat(SRCTYPE x) { \
-  return x >= MAX ? (DSTTYPE)MAX : x <= MIN ? (DSTTYPE)MIN : x; \
+  x = x >= MAX ? MAX : x; \
+  return x <= MIN ? (DSTTYPE)MIN : (DSTTYPE)x; \
 }
 '
 fi
@@ -173,8 +174,25 @@ DEF(short, long, -32768, 32767);
 DEF(ushort, long, 0, 65535);
 DEF(int, long, -0x7fffffff-1, 0x7fffffff);
 DEF(uint, long, 0, 0xffffffffu);
-DEF(long, float, -9.223372036854776e+18f, 9.223372036854776e+18f);
-DEF(ulong, float, 0, 1.8446744073709552e+19f);
+#undef DEF
+'
+
+if [ $1"a" = "-pa" ]; then
+    echo "
+#define DEF(DSTTYPE, SRCTYPE, SRC_MIN, SRC_MAX, DST_MIN, DST_MAX) \
+OVERLOADABLE DSTTYPE convert_ ## DSTTYPE ## _sat(SRCTYPE x);"
+else
+    echo '
+#define DEF(DSTTYPE, SRCTYPE, SRC_MIN, SRC_MAX, DST_MIN, DST_MAX) \
+OVERLOADABLE DSTTYPE convert_ ## DSTTYPE ## _sat(SRCTYPE x) { \
+  return x >= SRC_MAX ? DST_MAX : x <= SRC_MIN ? (DSTTYPE)DST_MIN : (DSTTYPE)x; \
+}
+'
+fi
+
+echo '
+DEF(long, float, -0x1.0p63, 0x1.0p63, 0x8000000000000000, 0x7fffffffffffffff);
+DEF(ulong, float, 0, 0x1.0p64, 0, 0xffffffffffffffff);
 #undef DEF
 '
 
-- 
1.9.1