gcn-scrypt

Scrypt opencl kernel written in AMD GCN ISA assembly language

Supported GPUs

Only tested on my R9 270

Hashrate

By now, the hashrate is slower than the original kernel compiled by AMD APP SDK. On my R9 270, gcn-scrypt hashes at 470KH/s, while the original kernel hashes at 488KH/s. I'm working on optimizing the hashrate.

Usage

• Build clyfish/sgminer
• Build clyfish/gcnasm
• Set gcnasm in PATH, then make.
• Copy kernel.bin or kernel_lds.bin in output to sgminer director, rename to correct name, eg pswPitcairnglg2tc5121nf10w256l4.bin.
• Run sgminer

Notice

kernel_lds.bin uses 84 VGPR, so it can run 12 wavefronts per compute unit, while kernel.bin and the original kernel can only run 8 wavefronts per compute unit. But, on my R9 270, kernel.bin hashes at 470KH/s, and kernel_lds.bin hashes at 440KH/s.

Donations

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• LTC: LZ8G5P553yFBVai4desySw3CNqnU9ynEVm
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