热度 8
2014-7-24 19:36
1264 次阅读|
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一:定义 脉动阵列:数据流同步流过相邻的二维阵列单元的处理器结构,一般不同方向流过不同数据。如下图: 二维不同数据在同一时钟下依次输入每个处理单元,而后完成乘法并存在其寄存器中。 二:举例 三:设计 结构: 单个 PE 的代码 module pe(clk, reset, coeff, in_x, in_y, out_x, out_y); parameter size = 8; input clk, reset; input in_x, coeff; input in_y; output out_x; output out_y; reg out_y; reg out_x; always@(posedge clk) begin if(reset) begin out_x = 0; out_y = 0; end else begin out_y = in_y + (in_x * coeff); out_x = in_x; end end endmodule 四个 PE ,其余类推 //***** main **************************** module systolic(clk, reset, input_x, output_y); parameter size = 8; input clk, reset; input input_x; output output_y; wire pe0_x, pe1_x, pe2_x, pe3_x; wire pe1_y, pe2_y, pe3_y; wire h0 = 8'h01; wire h1 = 8'h01; wire h2 = 8'h01; wire h3 = 8'h01; wire pe4_y = 16'h0000; pe pe_0(clk, reset, h0, input_x, pe1_y, pe0_x, output_y); pe pe_1(clk, reset, h1, pe0_x, pe2_y, pe1_x, pe1_y); pe pe_2(clk, reset, h2, pe1_x, pe3_y, pe2_x, pe2_y); pe pe_3(clk, reset, h3, pe2_x, pe4_y, pe3_x, pe3_y); endmodule