this patch passes following piglit test cases:
piglit/framework/../bin/cl-program-tester
generated_tests/cl/builtin/int/builtin-ulong-clz-1.0.generated.cl
piglit/framework/../bin/cl-program-tester
generated_tests/cl/builtin/int/builtin-long-clz-1.0.generated.cl
Signed-off-by: Homer Hsing <homer.x...@intel.com>
---
backend/src/ocl_stdlib.tmpl.h | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/backend/src/ocl_stdlib.tmpl.h b/backend/src/ocl_stdlib.tmpl.h
index 0a6a937..f209b52 100644
--- a/backend/src/ocl_stdlib.tmpl.h
+++ b/backend/src/ocl_stdlib.tmpl.h
@@ -313,11 +313,27 @@ INLINE_OVERLOADABLE uint clz(uint x) {
}
INLINE_OVERLOADABLE long clz(long x) {
- return 0;
+ if (x < 0)
+ return 0;
+ if (x == 0)
+ return 64;
+ union { int i[2]; long x; } u;
+ u.x = x;
+ uint v = clz(u.i[1]);
+ if(v == 32)
+ v += clz(u.i[0]);
+ return v;
}
INLINE_OVERLOADABLE ulong clz(ulong x) {
- return 0;
+ if (x == 0)
+ return 64;
+ union { uint i[2]; ulong x; } u;
+ u.x = x;
+ uint v = clz(u.i[1]);
+ if(v == 32)
+ v += clz(u.i[0]);
+ return v;
}
OVERLOADABLE int __gen_ocl_mul_hi(int x, int y);
--
1.8.1.2
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