Make it generate less instructions.
Signed-off-by: Ruiling Song <ruiling.s...@intel.com>
---
backend/src/libocl/tmpl/ocl_integer.tmpl.cl | 28 +++++----------------------
1 file changed, 5 insertions(+), 23 deletions(-)
diff --git a/backend/src/libocl/tmpl/ocl_integer.tmpl.cl
b/backend/src/libocl/tmpl/ocl_integer.tmpl.cl
index b46cf25..7357e16 100644
--- a/backend/src/libocl/tmpl/ocl_integer.tmpl.cl
+++ b/backend/src/libocl/tmpl/ocl_integer.tmpl.cl
@@ -350,35 +350,17 @@ DEC(ulong)
/* Char and short type abs diff */
/* promote char and short to int and will be no module overflow */
#define DEC(TYPE, UTYPE) OVERLOADABLE UTYPE abs_diff(TYPE x, TYPE y) \
- { return (UTYPE) (abs((int)x - (int)y)); }
+ { return y > x ? (y -x) : (x - y); }
DEC(char, uchar)
DEC(uchar, uchar)
DEC(short, ushort)
DEC(ushort, ushort)
+DEC(int, uint)
+DEC(uint, uint)
+DEC(long, ulong)
+DEC(ulong, ulong)
#undef DEC
-OVERLOADABLE uint abs_diff (uint x, uint y) {
- /* same signed will never overflow. */
- return y > x ? (y -x) : (x - y);
-}
-
-OVERLOADABLE uint abs_diff (int x, int y) {
- /* same signed will never module overflow. */
- if ((x >= 0 && y >= 0) || (x <= 0 && y <= 0))
- return abs(x - y);
-
- return (abs(x) + abs(y));
-}
-
-OVERLOADABLE ulong abs_diff (long x, long y) {
- if ((x >= 0 && y >= 0) || (x <= 0 && y <= 0))
- return abs(x - y);
- return abs(x) + abs(y);
-}
-OVERLOADABLE ulong abs_diff (ulong x, ulong y) {
- return y > x ? (y - x) : (x - y);
-}
-
#define DECL_MIN_MAX_CLAMP(TYPE) \
OVERLOADABLE TYPE max(TYPE a, TYPE b) { \
--
1.7.10.4
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