Initial commit

2021-02-28 18:59:56 +03:00
parent ff795d2b6e
commit 2fbacc0544
61 changed files with 6063 additions and 0 deletions
--- a/source/ice40_mac16x16.sv
+++ b/source/ice40_mac16x16.sv
@@ -0,0 +1,70 @@
+`timescale 1ns/100ps
+`default_nettype none
+
+/* verilator lint_off PINCONNECTEMPTY */
+
+module ice40_mac16x16 #(parameter SIGNED = 0)
+  (input wire clock,
+   input wire reset,
+   input wire [15:0] a,
+   input wire [15:0] b,
+   input wire [31:0] s,
+   input wire sub,
+   output wire [31:0] y);
+
+    /* register 'sub' input */
+    logic sub_r;
+    always_ff @ (posedge clock)
+      sub_r <= sub;
+
+    SB_MAC16
+      #(.NEG_TRIGGER(1'b0),
+        .C_REG(1'b1),                       // Registered C
+        .A_REG(1'b1),                       // Registered A
+        .B_REG(1'b1),                       // Registered B
+        .D_REG(1'b1),                       // Registered D
+        .TOP_8x8_MULT_REG(1'b0),
+        .BOT_8x8_MULT_REG(1'b0),
+        .PIPELINE_16x16_MULT_REG1(1'b0),
+        .PIPELINE_16x16_MULT_REG2(1'b0),
+        .TOPOUTPUT_SELECT(2'b00),           // TOP output - ADD/SUB unregistered
+        .TOPADDSUB_LOWERINPUT(2'b10),       // TOP adder input 1 - 16x16 multiplier upper word
+        .TOPADDSUB_UPPERINPUT(1'b1),        // TOP adder input 2 - input C
+        .TOPADDSUB_CARRYSELECT(2'b00),      // TOP adder carry input - constant 0
+        .BOTOUTPUT_SELECT(2'b00),           // BOT output - ADD/SUB unregistered
+        .BOTADDSUB_LOWERINPUT(2'b10),       // BOT adder input 1 - 16x16 multiplier lower word
+        .BOTADDSUB_UPPERINPUT(1'b1),        // BOT adder input 2 - input D
+        .BOTADDSUB_CARRYSELECT(2'b00),      // BOT adder carry input - constant 0
+        .MODE_8x8(1'b0),
+        .A_SIGNED(SIGNED),
+        .B_SIGNED(SIGNED))
+    mac_r
+      (.CLK(clock),
+       .CE(1'b1),
+       .C(s[31:16]),
+       .A(a),
+       .B(b),
+       .D(s[15:0]),
+       .AHOLD(1'b0),
+       .BHOLD(1'b0),
+       .CHOLD(1'b0),
+       .DHOLD(1'b0),
+       .IRSTTOP(reset),
+       .IRSTBOT(reset),
+       .ORSTTOP(reset),
+       .ORSTBOT(reset),
+       .OLOADTOP(1'b0),
+       .OLOADBOT(1'b0),
+       .ADDSUBTOP(sub_r),
+       .ADDSUBBOT(sub_r),
+       .OHOLDTOP(1'b0),
+       .OHOLDBOT(1'b0),
+       .CI(1'b0),
+       .ACCUMCI(1'b0),
+       .SIGNEXTIN(1'b0),
+       .O(y),
+       .CO(),
+       .ACCUMCO(),
+       .SIGNEXTOUT());
+
+endmodule // ice40_macadd16x16