Final bank promoted to sd_bram (the busiest: 5 read sites, 2 write sites).
Read port phase-muxed: ST_N load / ST_M load (pm_b s_hat[j]) vs accumulate
(e_hat, selected by m_loading) / ST_E dk-half / dbg. Write port combinational:
ST_C CBD store vs ST_N NTT writeback (disjoint states). All explicit consumer
read registers (n_rd_data, pm_b_rd, m_eacc_rd, e_se_rd) collapsed into the
sd_bram internal read register; m_acc_src and e_rd_coeff now select between
two registered sd_bram outputs (same 1-cycle latency).
mlkem_top now contains ZERO behavioural RAM arrays: all coefficient storage is
3 sd_bram banks (a/se/t) + ek/dkp byte buffers = 5 sd_bram instances total,
each inferring BRAM (ASIC: compiled SRAM). 11/11 KAT PASS, byte-exact.
FallenSigh
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