afo

Doubt about AMD vendor specific extension

Discussion created by afo on Jun 16, 2010
Latest reply on Jun 16, 2010 by afo
The output of amd_bitalign is uint or ulong?

Hi,

I was reading amd media extensions in the opencl programming guide, and in secction A8 (page A5) I see that amd_bitalign returns an UINTn, but the definition says

(uint) (((((long)src0) << 32) | (long)src1 >> (src2& 31))

so, arguments are promoted to long (64 bits) and one of them rotated left by 32, so I guess that there is a typo and the final result is ulong. Could someone from AMD confirm that?

The same situation happens for amd_bytealign

best regards,

Alfonso

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