yosys/techlibs/xilinx/brams_xc2v.txt

# Block RAMs for Virtex 2, Spartan 3, Spartan 3E, Spartan 3A(N)
# The corresponding mapping file is brams_xc2v_map.v

ram block $__XILINX_BLOCKRAM_ {
	abits 14;
	widths 1 2 4 9 18 36 per_port;
	ifdef HAS_BE {
		option "USE_BE" 1 byte 9;
	}
	cost 129;
	init any;
	port srsw "A" "B" {
		option "USE_BE" 0 width tied;
		ifdef HAS_BE {
			option "USE_BE" 1 width tied 9 18 36;
		}
		clock posedge;
		clken;
		rdsrst any gated_clken;
		rdinit any;
		portoption "WRITE_MODE" "NO_CHANGE" {
			rdwr no_change;
		}
		portoption "WRITE_MODE" "WRITE_FIRST" {
			rdwr new_only;
		}
		portoption "WRITE_MODE" "READ_FIRST" {
			rdwr old;
			wrtrans all old;
		}
		optional;
	}
}