With the pocl-0.8rc8 driver, when I try to use vector long
(ulong2..ulong16, long2..long16), or vector double types
(double2..double16), the compilation will fail.
E.g. (with 1 line update to the example/example1.cl)
__kernel void dot_product (__global const float4 *a, __global const
float4 *b, __global float *c)
{
int gid = get_global_id(0);
barrier(CLK_LOCAL_MEM_FENCE);
c[gid] = a[gid].x * b[gid].x;
c[gid] += a[gid].y * b[gid].y;
c[gid] += a[gid].z * b[gid].z;
c[gid] += a[gid].w * b[gid].w;
ulong2 dst = ((1UL<<32)+1UL);
}
Running this new example1 application will trigger runtime error as:
czhao@panda0:~/ResearchTools/Compiler/POCL/pocl-0.8/robj32-rc8-debug/examples/example1/.libs$
time ./example1
In file included from /tmp/poclY5zmDz//program.cl:1:
/tmp/poclY5zmDz//program.cl:14:3: error: use of undeclared identifier
'ulong2'; did you mean 'long'?
ulong2 dst = ((1UL<<32)+1UL);
^~~~~~
long
/tmp/poclY5zmDz//program.cl:14:21: warning: shift count >= width of type
[-Wshift-count-overflow]
ulong2 dst = ((1UL<<32)+1UL);
^ ~~
1 warning and 1 error generated.
ERROR
(0.000000, 0.000000, 0.000000, 0.000000) . (0.000000, 0.000000,
0.000000, 0.000000) = -0.000007
FAIL
This seems to me like a clang compilation issue, due to ulong2 was not
defined.
I did a quick search, it seems that all the vector long/vector
ulong/vector double types are indeed defined under
{POCL}/include/_kernel.h and {POCL}/include/CL/cl_platform.h
So, I am kind of confused here.
- Are the vector long/ulong/double types properly defined?
- Can we enable it somehow by default, or with a flag? (I tried #pragma
OPENCL EXTENSION cles_khr_int64 : enable, not help, clang just ignores it.)
Thank you very much
Chuck
Platform: Ubuntu/ARM: 12.04
Clang: 3.2
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