Module softmax 

Softmax kernel: numerically stable exponential normalization.

Matches softmax-kernel-v1.yaml. Four phases: find_max -> exp_subtract -> sum_exp -> normalize.

Functions

softmax_avx2^⚠

AVX2 SIMD implementation of numerically stable softmax.

softmax_ptx

PTX assembly for softmax kernel.

softmax_scalar

Scalar reference implementation of numerically stable softmax.