Wren6991

module wallace_adder #(
	parameter W = 32, // valid for W >= 1
	parameter N = 3   // valid for N >= 3
) (
	input  wire [W*N-1:0] in,
	output wire [W-1:0]   out
);

generate
if (N == 3) begin: base

Wren6991

module wallace_mult #(
	parameter W = 32
) (
	input wire            sext_a,
	input wire            sext_b,
	input wire  [W-1:0]   a,
	input wire  [W-1:0]   b,
	output wire [W*2-1:0] out
);

Wren6991

module tb();

localparam W = 29;
localparam TEST_LEN = 10000;

reg [W-1:0] a;
reg [W-1:0] b;
wire [W*2-1:0] out;

wallace_mult #(.W(W)) inst_radix2_mult (.sext_a(1'b0), .sext_b(1'b0), .a(a), .b(b), .out(out));

Wren6991

module tb();

localparam W = 29;
localparam TEST_LEN = 10000;

reg [W-1:0] a;
reg [W-1:0] b;
wire [W*2-1:0] out;

wallace_mult #(.W(W)) inst_radix2_mult (.sext_a(1'b0), .sext_b(1'b0), .a(a), .b(b), .out(out));

Wren6991

module riscboy_fpga #(
	parameter PRELOAD_FILE = "bootram_init32.hex"
) (
	input wire                     clk_osc,
	output wire [7:0]              led
);

`include "gpio_pinmap.vh"

// Clock + Reset resources

Wren6991

module tmds_encode (
	input  wire       clk,
	input  wire       rst_n,

	input  wire [1:0] c,
	input  wire [7:0] d,
	input  wire       den,

	output reg  [9:0] q
);

Wren6991

.syntax unified
.cpu cortex-m0plus
.thumb

#ifndef FONT_BLIT_UNROLL
#define FONT_BLIT_UNROLL 4
#endif

.macro decl_func name
.global \name

Wren6991

read_verilog hazard5_alu.v hazard5_shift_barrel.v
write_cxxrtl foo.cpp

Wren6991

module priority_select #(
	parameter N = 16 // any positive integer
) (
	input  wire [N-1:0] req,
	output wire [N-1:0] gnt
);

generate
if (N == 1) begin: base_case0
	assign gnt = req;

Wren6991

RISCBoy Audio Processing Unit (APU)

Goals:

• Resource budget: 100 LUTs (excluding system interface and digital DACs), two BRAMs
• 48 kHz 8 bit stereo output when running at 36 MHz
• Provide similar capability to an original Gameboy with default microcode
• Be rather more capable with user-supplied microcode
• Easy to use as a dumb wave-out ring buffer interface
• Fun to program