According to the Metal Feature Set Tables, only family 2 supports quad-scope permutation. We've been seeing issues with SIMD-group functions on family 1 hardware, so for now I'm moving quad-group permutation to family 2.
According to the Metal Feature Set Tables, only family 2 supports quad-scope permutation. We've been seeing issues with SIMD-group functions on family 1 hardware, so for now I'm moving quad-group permutation to family 2.