Microscaling Blocks - Microscaling Blocks - 2026.1 English - UG1864

# mx9 with convergent-to-even rounding
data = np.random.randn(32).astype(np.float32)
mx   = va.array(data, dtype=va.mx9(roundingMethod=12))
np.asarray(mx)      # quantized, then dequantized back to float32

mx[0:16]     # OK, full block
mx[16:32]    # OK, another full block
mx[:16]      # OK
mx[1:16]     # IndexError — not aligned on a block
mx[:5]       # IndexError — not a full block
mx[16]       # IndexError — element-level indexing not allowed