memory: ldm/stm ready for testing, hopefully

diff --git a/Memory.v b/Memory.v
index 0b27485b919ef8851763a6ee18522f58ef2783a1..e04a8049861508b8f1b3f0c42941df1e739dddd5 100644 (file)
--- a/Memory.v
+++ b/Memory.v
@@ -37,7 +37,7 @@ module Memory(
        output reg [31:0] out_write_data = 32'hxxxxxxxx
        );
 
        output reg [31:0] out_write_data = 32'hxxxxxxxx
        );
 

-       reg [31:0] addr, raddr, next_regdata;
+       reg [31:0] addr, raddr, prev_raddr, next_regdata;

        reg [3:0] next_regsel, cur_reg, prev_reg;
        reg next_writeback, next_notdone, next_inc_next;
        reg [31:0] align_s1, align_s2, align_rddata;
        reg [3:0] next_regsel, cur_reg, prev_reg;
        reg next_writeback, next_notdone, next_inc_next;
        reg [31:0] align_s1, align_s2, align_rddata;


@@ -49,6 +49,7 @@ module Memory(
 
        reg [15:0] regs, next_regs;
        reg started = 1'b0, next_started;
 
        reg [15:0] regs, next_regs;
        reg started = 1'b0, next_started;

+       reg [5:0] offset, prev_offset, offset_sel;

 
        reg notdone = 1'b0;
        reg inc_next = 1'b0;
 
        reg notdone = 1'b0;
        reg inc_next = 1'b0;


@@ -66,6 +67,8 @@ module Memory(
                regs <= next_regs;
                prev_reg <= cur_reg;
                started <= next_started;
                regs <= next_regs;
                prev_reg <= cur_reg;
                started <= next_started;

+               prev_offset <= offset;
+               prev_raddr <= raddr;

        end
 
        always @(*)
        end
 
        always @(*)


@@ -86,6 +89,7 @@ module Memory(
                outstall = 1'b0;
                next_regs = 16'b0;
                next_started = started;
                outstall = 1'b0;
                next_regs = 16'b0;
                next_started = started;

+               offset = prev_offset;

 
                casez(insn)
                `DECODE_LDRSTR_UNDEFINED: begin end
 
                casez(insn)
                `DECODE_LDRSTR_UNDEFINED: begin end


@@ -127,82 +131,87 @@ module Memory(
                        rd_req = insn[20];
                        wr_req = ~insn[20];
                        if(!started) begin
                        rd_req = insn[20];
                        wr_req = ~insn[20];
                        if(!started) begin

-                               next_regs = op1[15:0];
+//                             next_regs = insn[23] ? op1[15:0] : op1[0:15];
+                               /** verilator can suck my dick */
+                               next_regs = insn[23] ? op1[15:0] : {op1[0], op1[1], op1[2], op1[3], op1[4], op1[5], op1[6], op1[7],
+                                                                   op1[8], op1[9], op1[10], op1[11], op1[12], op1[13], op1[14], op1[15]};
+                               offset = 6'b0;

                                next_started = 1'b1;
                        end
                        else if(inc_next) begin
                                if(insn[21]) begin
                                        next_write_reg = 1'b1;
                                        next_write_num = insn[19:16];
                                next_started = 1'b1;
                        end
                        else if(inc_next) begin
                                if(insn[21]) begin
                                        next_write_reg = 1'b1;
                                        next_write_num = insn[19:16];

-                                       next_write_data = op0;
+                                       next_write_data = insn[23] ? op0 + {26'b0, prev_offset} : op0 - {26'b0, prev_offset};

                                end
                                next_started = 1'b0;
                        end
                        else if(rw_wait) begin
                                next_regs = regs;
                                cur_reg = prev_reg;
                                end
                                next_started = 1'b0;
                        end
                        else if(rw_wait) begin
                                next_regs = regs;
                                cur_reg = prev_reg;

+                               raddr = prev_raddr;

                        end
                        else begin
                                casez(regs)
                                16'b???????????????1: begin
                                        cur_reg = 4'h0;
                        end
                        else begin
                                casez(regs)
                                16'b???????????????1: begin
                                        cur_reg = 4'h0;

-                                       next_regs = regs & 16'b1111111111111110;
+                                       next_regs = {regs[15:1], 1'b0};

                                end
                                16'b??????????????10: begin
                                        cur_reg = 4'h1;
                                end
                                16'b??????????????10: begin
                                        cur_reg = 4'h1;

-                                       next_regs = regs & 16'b1111111111111100;
+                                       next_regs = {regs[15:2], 2'b0};

                                end
                                16'b?????????????100: begin
                                        cur_reg = 4'h2;
                                end
                                16'b?????????????100: begin
                                        cur_reg = 4'h2;

-                                       next_regs = regs & 16'b1111111111111000;
+                                       next_regs = {regs[15:3], 3'b0};

                                end
                                16'b????????????1000: begin
                                        cur_reg = 4'h3;
                                end
                                16'b????????????1000: begin
                                        cur_reg = 4'h3;

-                                       next_regs = regs & 16'b1111111111110000;
+                                       next_regs = {regs[15:4], 4'b0};

                                end
                                16'b???????????10000: begin
                                        cur_reg = 4'h4;
                                end
                                16'b???????????10000: begin
                                        cur_reg = 4'h4;

-                                       next_regs = regs & 16'b1111111111100000;
+                                       next_regs = {regs[15:5], 5'b0};

                                end
                                16'b??????????100000: begin
                                        cur_reg = 4'h5;
                                end
                                16'b??????????100000: begin
                                        cur_reg = 4'h5;

-                                       next_regs = regs & 16'b1111111111000000;
+                                       next_regs = {regs[15:6], 6'b0};

                                end
                                16'b?????????1000000: begin
                                        cur_reg = 4'h6;
                                end
                                16'b?????????1000000: begin
                                        cur_reg = 4'h6;

-                                       next_regs = regs & 16'b1111111110000000;
+                                       next_regs = {regs[15:7], 7'b0};

                                end
                                16'b????????10000000: begin
                                        cur_reg = 4'h7;
                                end
                                16'b????????10000000: begin
                                        cur_reg = 4'h7;

-                                       next_regs = regs & 16'b1111111100000000;
+                                       next_regs = {regs[15:8], 8'b0};

                                end
                                16'b???????100000000: begin
                                        cur_reg = 4'h8;
                                end
                                16'b???????100000000: begin
                                        cur_reg = 4'h8;

-                                       next_regs = regs & 16'b1111111000000000;
+                                       next_regs = {regs[15:9], 9'b0};

                                end
                                16'b??????1000000000: begin
                                        cur_reg = 4'h9;
                                end
                                16'b??????1000000000: begin
                                        cur_reg = 4'h9;

-                                       next_regs = regs & 16'b1111110000000000;
+                                       next_regs = {regs[15:10], 10'b0};

                                end
                                16'b?????10000000000: begin
                                        cur_reg = 4'hA;
                                end
                                16'b?????10000000000: begin
                                        cur_reg = 4'hA;

-                                       next_regs = regs & 16'b1111100000000000;
+                                       next_regs = {regs[15:11], 11'b0};

                                end
                                16'b????100000000000: begin
                                        cur_reg = 4'hB;
                                end
                                16'b????100000000000: begin
                                        cur_reg = 4'hB;

-                                       next_regs = regs & 16'b1111000000000000;
+                                       next_regs = {regs[15:12], 12'b0};

                                end
                                16'b???1000000000000: begin
                                        cur_reg = 4'hC;
                                end
                                16'b???1000000000000: begin
                                        cur_reg = 4'hC;

-                                       next_regs = regs & 16'b1110000000000000;
+                                       next_regs = {regs[15:13], 13'b0};

                                end
                                16'b??10000000000000: begin
                                        cur_reg = 4'hD;
                                end
                                16'b??10000000000000: begin
                                        cur_reg = 4'hD;

-                                       next_regs = regs & 16'b1100000000000000;
+                                       next_regs = {regs[15:14], 14'b0};

                                end
                                16'b?100000000000000: begin
                                        cur_reg = 4'hE;
                                end
                                16'b?100000000000000: begin
                                        cur_reg = 4'hE;

-                                       next_regs = regs & 16'b1000000000000000;
+                                       next_regs = {regs[15], 15'b0};

                                end
                                16'b1000000000000000: begin
                                        cur_reg = 4'hF;
                                end
                                16'b1000000000000000: begin
                                        cur_reg = 4'hF;


@@ -213,8 +222,23 @@ module Memory(
                                        next_regs = 16'b0;
                                end
                                endcase
                                        next_regs = 16'b0;
                                end
                                endcase

+                               cur_reg = insn[23] ? 4'hF - cur_reg : cur_reg;
+                               offset = prev_offset + 6'h4;
+                               offset_sel = insn[24] ? offset : prev_offset;
+                               raddr = insn[23] ? op0 + {26'b0, offset_sel} : op0 - {26'b0, offset_sel};
+
+                               if(insn[20]) begin
+                                       next_write_reg = 1'b1;
+                                       next_write_num = cur_reg;
+                                       next_write_data = rd_data;
+                               end
+
+                               st_read = cur_reg;
+                               wr_data = st_data;
+

                                next_inc_next = next_regs == 16'b0;
                                next_notdone = ~next_inc_next | (rw_wait & insn[20] & insn[21]);
                                next_inc_next = next_regs == 16'b0;
                                next_notdone = ~next_inc_next | (rw_wait & insn[20] & insn[21]);

+                               busaddr = {raddr[31:2], 2'b0};

                        end
                end
                default: begin end
                        end
                end
                default: begin end