Register file macro-generator
#include <genlib.h>
void GENLIB_MACRO (DPGEN_RF1, char *modelname, long flags, long N);
void GENLIB_MACRO (DPGEN_RF1R0, char *modelname, long flags, long N);
Generate a register file of regNumber words of N bits whitout decoder named modelname. The DPGEN_RF1R0 variant differs from the DPGEN_RF1 in that the register of address zero is stuck to zero. You can write into it, it will not change the value. When read, it will always return zero.
How it works :
•
datain0 and datain1 : the two write busses. Only one is used to actually write the register word, it is selected by the sel signal.
•
sel : when set to '0' the datain0 is used to write the register word, otherwise it will be datain1.
•
selr, selw : this register file have no decoder, so selr have a bus width equal to regNumber. One bit for each word.
1.
ckok : clock signal (input, 1 bit).
2.
sel : select the write bus (input, 1 bit).
3.
selr : the decoded read address (input, regNumber bits).
4.
selw : the decoded write address (input, regNumber bits).
5.
datain0 : first write bus (input, N bits).
6.
datain1 : second write bus (input, N bits).
7.
dataout : read bus (output, N bits).
8.
vdd : power.
9.
vss : ground.
GENLIB_MACRO(DPGEN_RF1, "model_rf1x8_32"
, F_BEHAV|F_PLACE
, 32 /* Words size. */
, 8 /* Number of words. */
);
GENLIB_LOINS( "model_rf1x8_32"
, "instance1_rf1_32"
, "ckok"
, "sel"
, "selr[7:0]"
, "selw[7:0]"
, "datain0[31:0]"
, "datain1[31:0]"
, "dataout[31:0]"
, "vdd", "vss", NULL
);