| // SPDX-FileCopyrightText: 2020 Efabless Corporation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // SPDX-License-Identifier: Apache-2.0 |
| |
| `include "compare.sv" |
| `include "add_sub.sv" |
| `include "fpu_lib.sv" |
| `include "float_to_int.sv" |
| `include "f_class.sv" |
| `include "divider.sv" |
| `include "min_max.sv" |
| `include "multiplier.sv" |
| `include "sign_inject.sv" |
| `include "int_to_float.sv" |
| `include "fused_mul.sv" |
| `include "sqrt_fpu.sv" |
| `include "registers.sv" |
| |
| module fpu_top |
| ( |
| input wire clk, |
| input wire rst_l, // active low reset |
| |
| input wire wb_valid, // valid signal from wb |
| input wire [31:0] rdwraddr, // read/write address from wb |
| input wire [31:0] wrdata, // write data received from wb |
| |
| input wire [31:0] la_write, // wire analyzer write enable |
| input wire [31:0] la_data, // wire analyzer write data |
| input wire [31:0] la_addr, // wire analyzer address |
| //outputs |
| output wire illegal_op, |
| output wire ack, |
| |
| output wire [31:0] rddata, // read data sent to wb |
| output wire [31:0] out, // to GPIO |
| output wire [4:0] exceptions // on hold for now |
| ); |
| wire la_write_en; |
| |
| wire [31:0] a; |
| wire [31:0] b; |
| wire [31:0] c; |
| |
| wire [1:0] op_in; |
| wire [1:0] op_out; |
| |
| wire [2:0] round_mode; |
| |
| wire [10:0] valid_in; // (sqrt, div, fma, multi, add-sub, f2i, i2f, min-max, comp, sign_inj, f-class) |
| wire [10:0] valid_out; |
| |
| wire [31:0] fclass_out; |
| |
| wire [4:0] cmp_exceptions; |
| wire [31:0] cmp_out; |
| |
| wire [4:0] min_max_exceptions; |
| wire [31:0] min_max_out; |
| |
| wire [4:0] itof_exceptions; |
| wire [31:0] itof_out; |
| |
| wire [4:0] ftoi_exceptions; |
| wire [31:0] ftoi_out; |
| |
| wire [31:0] sinj_out; |
| |
| wire [4:0] add_sub_exceptions; |
| wire [31:0] add_sub_out; |
| |
| wire [4:0] mul_exceptions; |
| wire [31:0] mul_out; |
| |
| wire [4:0] mac_exceptions; |
| wire [31:0] mac_out; |
| |
| wire [4:0] sqrt_exceptions; |
| wire [31:0] sqrt_out; |
| |
| wire [4:0] div_exceptions; |
| wire [31:0] div_out; |
| wire div_valid_out; |
| wire sqrt_valid_out; |
| |
| wire [4:0] excep_temp; |
| wire [31:0] out_temp; |
| |
| wire [31:0] int_rddata; |
| wire [31:0] addr; |
| |
| wire wb_valid_f; |
| wire wb_valid_ns; |
| |
| wire [31:0] fpu_result; |
| wire [31:0] data; |
| |
| assign la_write_en = |la_write; |
| assign addr = la_write_en ? la_addr : rdwraddr; |
| assign data = la_write_en ? la_data : wrdata; |
| |
| fpu_registers csrs ( .clk (clk ), |
| .rst_l (rst_l ), |
| .fpu_result (fpu_result ), |
| .fpu_valids ({valid_out, op_out} ), |
| .addr (addr ), |
| .wren (wb_valid | la_write_en ), |
| .wrdata (data ), |
| .exceptions (exceptions ), |
| .rddata (int_rddata ), |
| .opA (a ), |
| .opB (b ), |
| .opC (c ), |
| .frm (round_mode ), |
| .op_valids ({valid_in, op_in} ), |
| .ack (ack ), |
| .result (out )); |
| |
| f_class #(8,24) fpu_fclass ( .in (a ), |
| .result (fclass_out ) ); |
| |
| sign_inject #(8,24) fpu_sgn_inj ( .a (a ), |
| .b (b ), |
| .op (op_in ), |
| .out (sinj_out ) ); |
| |
| compare #(8,24) fpu_comp ( .a (a ), |
| .b (b ), |
| .op (op_in ), |
| .out (cmp_out ), |
| .exceptions (cmp_exceptions ) ); |
| |
| min_max #(8,24) fpu_min_max ( .a (a ), |
| .b (b ), |
| .op (op_in[0] ), |
| .out (min_max_out ), |
| .exceptions (min_max_exceptions ) ); |
| |
| int_to_float #(32,8,24) fpu_i2f ( .signed_in (op_in[0] ), |
| .num (a ), |
| .round_mode (round_mode ), |
| .out (itof_out ), |
| .exceptions (itof_exceptions ) ); |
| |
| float_to_int #(8,24) fpu_f2i ( .num (a ), |
| .round_mode (round_mode ), |
| .signed_out (op_in[0] ), |
| .out (ftoi_out ), |
| .int_exceptions (ftoi_exceptions ) ); |
| |
| add_sub fpu_add_sub ( .in_x (a ), |
| .in_y (b ), |
| .operation (op_in[0] ), |
| .round_mode (round_mode ), |
| .out_z (add_sub_out ), |
| .exceptions (add_sub_exceptions ) ); |
| |
| multiplier #(8,24) fpu_mult ( .a (a ), |
| .b (b ), |
| .round_mode (round_mode ), |
| .exceptions (mul_exceptions ), |
| .out (mul_out ) ); |
| |
| fused_multiply #(8,24) fpu_fma ( .a (a ), |
| .b (b ), |
| .c (c ), |
| .op (op_in ), |
| .round_mode (round_mode ), |
| .out (mac_out ), |
| .exceptions (mac_exceptions ) ); |
| |
| divider #(8,24) fpu_divider ( .rst_l (rst_l ), |
| .clk (clk ), |
| .in_valid (valid_in[9] ), |
| .a (a ), |
| .b (b ), |
| .round_mode (round_mode ), |
| .cancel (1'b0 ), |
| .in_ready ( ), |
| .out_valid (div_valid_out ), |
| .out (div_out ), |
| .exceptions (div_exceptions ) ); |
| |
| sqrt #(8,24) fpu_sqrt ( .clk (clk ), |
| .rst_l (rst_l ), |
| .in_valid (valid_in[10] ), |
| .a (a ), |
| .round_mode (round_mode ), |
| .cancel (1'b0 ), |
| .in_ready ( ), |
| .out_valid (sqrt_valid_out ), |
| .out (sqrt_out ), |
| .exceptions (sqrt_exceptions ) ); |
| |
| // check for illegal op in case of sign inject and compare result |
| assign illegal_op = ((valid_in[1] || valid_in[2]) && (op_in == 2'b11)) ? 1'b1 : 1'b0; |
| |
| // output operation performed |
| assign op_out = ({valid_in[1] || valid_in[2] || valid_in[3] || valid_in[4] || |
| valid_in[5] || valid_in[6] || valid_in[8]}) ? op_in : 2'b0; |
| |
| assign valid_out = {sqrt_valid_out,div_valid_out,valid_in[8:0]}; |
| |
| assign wb_valid_ns = (|valid_out | wb_valid | la_write_en) ? (wb_valid | la_write_en) : wb_valid_f; |
| |
| rvdff #(1) wb_valid_ff (.clk(clk), .rst_l(rst_l), .din(wb_valid_ns), .dout(wb_valid_f)); |
| |
| // return output data according to module enable |
| assign {fpu_result, exceptions} = ({37{illegal_op}} & {32'b0 ,5'b0 }) | |
| ({37{sqrt_valid_out & wb_valid_f}} & {sqrt_out ,sqrt_exceptions }) | |
| ({37{div_valid_out & wb_valid_f}} & {div_out ,div_exceptions }) | |
| ({37{valid_in[8] & wb_valid_f}} & {mac_out ,mac_exceptions }) | |
| ({37{valid_in[7] & wb_valid_f}} & {mul_out ,mul_exceptions }) | |
| ({37{valid_in[6] & wb_valid_f}} & {add_sub_out,add_sub_exceptions}) | |
| ({37{valid_in[5] & wb_valid_f}} & {ftoi_out ,ftoi_exceptions }) | |
| ({37{valid_in[4] & wb_valid_f}} & {itof_out ,itof_exceptions }) | |
| ({37{valid_in[3] & wb_valid_f}} & {min_max_out,min_max_exceptions}) | |
| ({37{valid_in[2] & wb_valid_f}} & {cmp_out ,cmp_exceptions }) | |
| ({37{valid_in[1] & wb_valid_f}} & {sinj_out ,5'b0 }) | |
| ({37{valid_in[0] & wb_valid_f}} & {fclass_out ,5'b0 }); |
| |
| // data to be read from memory |
| assign rddata = wb_valid_f ? 32'b0 : la_write_en ? (la_write & la_data) : int_rddata; |
| |
| endmodule |
| |
| |
| |
| // SPDX-FileCopyrightText: 2020 Efabless Corporation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // SPDX-License-Identifier: Apache-2.0 |
| |
| `default_nettype none |
| /* |
| *------------------------------------------------------------- |
| * |
| * user_proj_example |
| * |
| * This is an example of a (trivially simple) user project, |
| * showing how the user project can connect to the wire |
| * analyzer, the wishbone bus, and the I/O pads. |
| * |
| * This project generates an integer count, which is output |
| * on the user area GPIO pads (digital output only). The |
| * wishbone connection allows the project to be controlled |
| * (start and stop) from the management SoC program. |
| * |
| * See the testbenches in directory "mprj_counter" for the |
| * example programs that drive this user project. The three |
| * testbenches are "io_ports", "la_test1", and "la_test2". |
| * |
| *------------------------------------------------------------- |
| */ |
| |
| module user_proj_example #( |
| parameter BITS = 32 |
| )( |
| `ifdef USE_POWER_PINS |
| inout vdda1, // User area 1 3.3V supply |
| inout vdda2, // User area 2 3.3V supply |
| inout vssa1, // User area 1 analog ground |
| inout vssa2, // User area 2 analog ground |
| inout vccd1, // User area 1 1.8V supply |
| inout vccd2, // User area 2 1.8v supply |
| inout vssd1, // User area 1 digital ground |
| inout vssd2, // User area 2 digital ground |
| `endif |
| |
| // Wishbone Slave ports (WB MI A) |
| input wb_clk_i, |
| input wb_rst_i, |
| input wbs_stb_i, |
| input wbs_cyc_i, |
| input wbs_we_i, |
| input [3:0] wbs_sel_i, |
| input [31:0] wbs_dat_i, |
| input [31:0] wbs_adr_i, |
| output wbs_ack_o, |
| output [31:0] wbs_dat_o, |
| |
| // wire Analyzer Signals |
| input [127:0] la_data_in, |
| output [127:0] la_data_out, |
| input [127:0] la_oenb, |
| |
| // IOs |
| input wire [37:0] io_in, |
| output wire [37:0] io_out, |
| output wire [37:0] io_oeb, |
| |
| output [2:0]irq |
| ); |
| wire clk; |
| wire rst; |
| |
| wire [31:0] rdata; |
| wire [31:0] wdata; |
| //wire [BITS-1:0] signal_received; |
| |
| wire valid; |
| wire [3:0] wstrb; |
| wire [31:0] la_write; |
| |
| // WB MI A |
| assign valid = wbs_cyc_i && wbs_stb_i && (|wbs_sel_i) && wbs_we_i; |
| //assign wstrb = wbs_sel_i & {4{wbs_we_i}}; |
| assign wbs_dat_o = rdata; |
| assign wdata = wbs_dat_i; |
| |
| // IO |
| assign io_out[37:32] = 6'b0; |
| assign io_oeb = {(37){rst}}; |
| |
| // LA |
| assign la_data_out = {{(127-BITS){1'b0}}, io_out}; |
| // Assuming LA probes [31:0] are for controlling the input register |
| assign la_write = ~la_oenb[31:0] & ~valid; |
| // Assuming LA probes [65:64] are for controlling the count clk & reset |
| assign clk = (~la_oenb[32]) ? la_data_in[64]: wb_clk_i; |
| assign rst = (~la_oenb[33]) ? la_data_in[65]: wb_rst_i; |
| |
| |
| wire illegal_op; |
| wire [4:0]exceptions; |
| |
| assign irq = illegal_op ? 3'b001 : exceptions[0] ? 3'b010 : exceptions[1] ? 3'b011 : exceptions[2] ? 3'b100 : exceptions[3] ? 3'b101 : 3'b000; |
| |
| |
| |
| fpu_top fpu ( |
| .clk(clk), |
| .rst_l(~rst), |
| //.wren(|wstrb), |
| .wb_valid(valid), |
| .la_write(la_write), |
| .la_data(la_data_in[63:32]), |
| .la_addr(la_data_in[31:0]), |
| .rdwraddr(wbs_adr_i), |
| .wrdata(wdata), |
| .rddata(rdata), |
| .illegal_op(illegal_op), |
| .ack(wbs_ack_o), |
| .exceptions(exceptions), |
| .out(io_out[31:0])); |
| |
| endmodule |
| |
| `default_nettype wire |
