nvfp4_quant

Composable Triton JIT functions for NVFP4 (E2M1) fake quantization.

Single source of truth for FP4 decision-boundary rounding. Used by:

• ../gemm/fp4_kernel.py (standalone blockwise fake quant)

• ../gemm/fp4_kernel_hopper.py (Hopper block-pointer variant)

• ../gemm/gptq_fused_kernel.py (fused GPTQ scalar path)

• ../attention/p_qdq.py (softmax-P qdq in the flash-attention kernel)

FP4 (E2M1) representable magnitudes: {0.0, 0.5, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0}