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| 1 | +/* |
| 2 | + * Definitons is to provide in ./include/generic_definitons.vh |
| 3 | +*/ |
| 4 | + |
| 5 | +module memory_controller |
| 6 | +( |
| 7 | + clk, |
| 8 | + memory_controller_address, |
| 9 | + memory_controller_write_enable, |
| 10 | + memory_controller_in, |
| 11 | + memory_controller_out |
| 12 | +); |
| 13 | +input clk; |
| 14 | +input [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] memory_controller_address; |
| 15 | +input memory_controller_write_enable; |
| 16 | +input [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_in; |
| 17 | +output [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_out; |
| 18 | +reg [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_out; |
| 19 | + |
| 20 | + |
| 21 | +reg [4:0] str_address; |
| 22 | +reg str_write_enable; |
| 23 | +reg [7:0] str_in; |
| 24 | +wire [7:0] str_out; |
| 25 | + |
| 26 | +single_port_ram _str ( |
| 27 | + .clk( clk ), |
| 28 | + .addr( str_address ), |
| 29 | + .we( str_write_enable ), |
| 30 | + .data( str_in ), |
| 31 | + .out( str_out ) |
| 32 | +); |
| 33 | + |
| 34 | + |
| 35 | +wire tag; |
| 36 | + |
| 37 | +//must use all wires inside module..... |
| 38 | +assign tag = |memory_controller_address & |memory_controller_address & | memory_controller_in; |
| 39 | +reg [`MEMORY_CONTROLLER_TAG_SIZE-1:0] prevTag; |
| 40 | +always @(posedge clk) |
| 41 | + prevTag <= tag; |
| 42 | +always @( tag or memory_controller_address or memory_controller_write_enable or memory_controller_in) |
| 43 | +begin |
| 44 | + |
| 45 | +case(tag) |
| 46 | + |
| 47 | + 1'b0: |
| 48 | + begin |
| 49 | + str_address = memory_controller_address[5-1+0:0]; |
| 50 | + str_write_enable = memory_controller_write_enable; |
| 51 | + str_in[8-1:0] = memory_controller_in[8-1:0]; |
| 52 | + end |
| 53 | +endcase |
| 54 | + |
| 55 | +case(prevTag) |
| 56 | + |
| 57 | + 1'b0: |
| 58 | + memory_controller_out = str_out; |
| 59 | +endcase |
| 60 | +end |
| 61 | + |
| 62 | +endmodule |
| 63 | + |
| 64 | + |
| 65 | +module memset |
| 66 | + ( |
| 67 | + clk, |
| 68 | + reset, |
| 69 | + start, |
| 70 | + finish, |
| 71 | + return_val, |
| 72 | + m, |
| 73 | + c, |
| 74 | + n, |
| 75 | + memory_controller_write_enable, |
| 76 | + memory_controller_address, |
| 77 | + memory_controller_in, |
| 78 | + memory_controller_out |
| 79 | + ); |
| 80 | + |
| 81 | +output[`MEMORY_CONTROLLER_ADDR_SIZE-1:0] return_val; |
| 82 | +reg [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] return_val; |
| 83 | +input clk; |
| 84 | +input reset; |
| 85 | +input start; |
| 86 | + |
| 87 | +output finish; |
| 88 | +reg finish; |
| 89 | + |
| 90 | +input [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] m; |
| 91 | +input [31:0] c; |
| 92 | +input [31:0] n; |
| 93 | + |
| 94 | +output [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] memory_controller_address; |
| 95 | +reg [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] memory_controller_address; |
| 96 | + |
| 97 | +output memory_controller_write_enable; |
| 98 | +reg memory_controller_write_enable; |
| 99 | + |
| 100 | +output [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_in; |
| 101 | +reg [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_in; |
| 102 | + |
| 103 | +output [`MEMORY_CONTROLLER_DATA_SIZE-1:0] memory_controller_out; |
| 104 | + |
| 105 | +reg [3:0] cur_state; |
| 106 | + |
| 107 | +/* |
| 108 | +parameter Wait = 4'd0; |
| 109 | +parameter entry = 4'd1; |
| 110 | +parameter entry_1 = 4'd2; |
| 111 | +parameter entry_2 = 4'd3; |
| 112 | +parameter bb = 4'd4; |
| 113 | +parameter bb_1 = 4'd5; |
| 114 | +parameter bb1 = 4'd6; |
| 115 | +parameter bb1_1 = 4'd7; |
| 116 | +parameter bb_nph = 4'd8; |
| 117 | +parameter bb2 = 4'd9; |
| 118 | +parameter bb2_1 = 4'd10; |
| 119 | +parameter bb2_2 = 4'd11; |
| 120 | +parameter bb2_3 = 4'd12; |
| 121 | +parameter bb2_4 = 4'd13; |
| 122 | +parameter bb4 = 4'd14; |
| 123 | +*/ |
| 124 | + |
| 125 | +memory_controller memtroll (clk,memory_controller_address, memory_controller_write_enable, memory_controller_in, memory_controller_out); |
| 126 | + |
| 127 | + |
| 128 | +reg [31:0] indvar; |
| 129 | +reg var1; |
| 130 | +reg [31:0] tmp; |
| 131 | +reg [31:0] tmp8; |
| 132 | +reg var2; |
| 133 | +reg [31:0] var0; |
| 134 | +reg [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] scevgep; |
| 135 | +reg [`MEMORY_CONTROLLER_ADDR_SIZE-1:0] s_07; |
| 136 | +reg [31:0] indvar_next; |
| 137 | +reg exitcond; |
| 138 | + |
| 139 | +always @(posedge clk) |
| 140 | +if (reset) |
| 141 | + cur_state <= 4'b0000; |
| 142 | +else |
| 143 | +case(cur_state) |
| 144 | + 4'b0000: |
| 145 | + begin |
| 146 | + finish <= 1'b0; |
| 147 | + if (start == 1'b1) |
| 148 | + cur_state <= 4'b0001; |
| 149 | + else |
| 150 | + cur_state <= 4'b0000; |
| 151 | + end |
| 152 | + 4'b0001: |
| 153 | + begin |
| 154 | + |
| 155 | + |
| 156 | + |
| 157 | + var0 <= n & 32'b00000000000000000000000000000011; |
| 158 | + |
| 159 | + cur_state <= 4'b0010; |
| 160 | + end |
| 161 | + 4'b0010: |
| 162 | + begin |
| 163 | + |
| 164 | + var1 <= 1'b0; |
| 165 | + var0 <= 32'b00000000000000000000000000000000; |
| 166 | + |
| 167 | + cur_state <= 4'b0011; |
| 168 | + end |
| 169 | + 4'b0011: |
| 170 | + begin |
| 171 | + |
| 172 | + |
| 173 | + if (|var1) begin |
| 174 | + cur_state <= 4'b0110; |
| 175 | + end |
| 176 | + else |
| 177 | + begin |
| 178 | + |
| 179 | + cur_state <= 4'b0100; |
| 180 | + end |
| 181 | + end |
| 182 | + 4'b0100: |
| 183 | + begin |
| 184 | + |
| 185 | + cur_state <= 4'b0101; |
| 186 | + end |
| 187 | + 4'b0101: |
| 188 | + begin |
| 189 | + cur_state <= 4'b0110; |
| 190 | + end |
| 191 | + 4'b0110: |
| 192 | + begin |
| 193 | + |
| 194 | + var2 <= | (n [31:4]); |
| 195 | + |
| 196 | + cur_state <= 4'b0111; |
| 197 | + end |
| 198 | + 4'b0111: |
| 199 | + begin |
| 200 | + |
| 201 | + if (|var2) |
| 202 | + begin |
| 203 | + cur_state <= 4'b1110; |
| 204 | + end |
| 205 | + else |
| 206 | + begin |
| 207 | + cur_state <= 4'b1000; |
| 208 | + end |
| 209 | + end |
| 210 | + 4'b1000: |
| 211 | + begin |
| 212 | + |
| 213 | + tmp <= n ; |
| 214 | + |
| 215 | + indvar <= 32'b00000000000000000000000000000000; |
| 216 | + cur_state <= 4'b1001; |
| 217 | + end |
| 218 | + 4'b1001: |
| 219 | + begin |
| 220 | + |
| 221 | + cur_state <= 4'b1010; |
| 222 | + end |
| 223 | + 4'b1010: |
| 224 | + begin |
| 225 | + tmp8 <= indvar; |
| 226 | + indvar_next <= indvar; |
| 227 | + cur_state <= 4'b1011; |
| 228 | + end |
| 229 | + 4'b1011: |
| 230 | + begin |
| 231 | + |
| 232 | + scevgep <= (m & tmp8); |
| 233 | + |
| 234 | + exitcond <= (indvar_next == tmp); |
| 235 | + |
| 236 | + cur_state <= 4'b1100; |
| 237 | + end |
| 238 | + 4'b1100: |
| 239 | + begin |
| 240 | + |
| 241 | + s_07 <= scevgep; |
| 242 | + |
| 243 | + cur_state <= 4'b1101; |
| 244 | + end |
| 245 | + 4'b1101: |
| 246 | + |
| 247 | + begin |
| 248 | + |
| 249 | + |
| 250 | + if (exitcond) |
| 251 | + begin |
| 252 | + cur_state <= 4'b1110; |
| 253 | + end |
| 254 | + else |
| 255 | + begin |
| 256 | + indvar <= indvar_next; |
| 257 | + cur_state <= 4'b1001; |
| 258 | + end |
| 259 | + end |
| 260 | + |
| 261 | + |
| 262 | + 4'b1110: |
| 263 | + begin |
| 264 | + |
| 265 | + return_val <= m; |
| 266 | + finish <= 1'b1; |
| 267 | + cur_state <= 4'b0000; |
| 268 | + end |
| 269 | +endcase |
| 270 | + |
| 271 | +always @(cur_state) |
| 272 | +begin |
| 273 | + |
| 274 | + case(cur_state) |
| 275 | + 4'b1101: |
| 276 | + begin |
| 277 | + memory_controller_address = s_07; |
| 278 | + memory_controller_write_enable = 1'b1; |
| 279 | + memory_controller_in = c; |
| 280 | + end |
| 281 | + endcase |
| 282 | +end |
| 283 | + |
| 284 | +endmodule |
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