order - Fast way to swap endianness using opencl -


i'm reading , writing lots of fits , dng images may contain data of endianness different platform and/or opencl device.

currently swap byte order in host's memory if necessary slow , requires step.

is there fast way pass buffer of int/float/short having wrong endianess opencl-kernel?

using kernel run fixing endianess ok; using overheadless auto-fixing-read/-write operation perfect.

i know variable attribute ((endian(host/device))) doesn't big endian fits file on little endian platform using little endian device.

i thought solution 1 (neither implemented nor tested, yet):

uint4 mask = (uint4) (3, 2, 1, 0); uchar4 swappedendianness = shuffle(originalendianness, mask); // applied on float/int-buffer somehow

hoping there's better solution out there.

thanks in advance, runtimeterror

sure. since have uchar4 - can swizzle components , write them back.

output[tid] = input[tid].wzyx;

swizzling performant on simd architectures little cost, should able combine other operations in kernel.

hope helps!


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