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一段变态verilog代码，分别在xilinx和altera的器件上实现。
128bit的One hot码转到7bit的计数码，组合逻辑
//////////////////////////////////////////////////////////////////
module decode(
input [127:0] in,
output reg [6:0] out
);
always@(in) begin
case (in)
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001: out = 0;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010: out = 1;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100: out = 2;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000: out = 3;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000: out = 4;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000: out = 5;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000: out = 6;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000: out = 7;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000: out = 8;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000: out = 9;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000: out = 10;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000: out = 11;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000: out = 12;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000: out = 13;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000: out = 14;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000: out = 15;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000: out = 16;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000: out = 17;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000: out = 18;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000: out = 19;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000: out = 20;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000: out = 21;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000: out = 22;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000: out = 23;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000: out = 24;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000: out = 25;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000: out = 26;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000: out = 27;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000: out = 28;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000: out = 29;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000: out = 30;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000: out = 31;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000: out = 32;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000: out = 33;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000: out = 34;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000: out = 35;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000: out = 36;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000: out = 37;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000: out = 38;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000: out = 39;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000: out = 40;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000: out = 41;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000: out = 42;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000: out = 43;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000: out = 44;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000: out = 45;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000: out = 46;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000: out = 47;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000: out = 48;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000: out = 49;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000: out = 50;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000: out = 51;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000: out = 52;
128'b00000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000: out = 53;
128'b00000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000: out = 54;
128'b00000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000: out = 55;
128'b00000000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000: out = 56;
128'b00000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000: out = 57;
128'b00000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000: out = 58;
128'b00000000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000: out = 59;
128'b00000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000: out = 60;
128'b00000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000: out = 61;
128'b00000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000: out = 62;
128'b00000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000: out = 63;
128'b00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000: out = 64;
128'b00000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000: out = 65;
128'b00000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000: out = 66;
128'b00000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000: out = 67;
128'b00000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000: out = 68;
128'b00000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000: out = 69;
128'b00000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000: out = 70;
128'b00000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000: out = 71;
128'b00000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000: out = 72;
128'b00000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000: out = 73;
128'b00000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000: out = 74;
128'b00000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000: out = 75;
128'b00000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000: out = 76;
128'b00000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000: out = 77;
128'b00000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 78;
128'b00000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 79;
128'b00000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 80;
128'b00000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 81;
128'b00000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 82;
128'b00000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 83;
128'b00000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 84;
128'b00000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 85;
128'b00000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 86;
128'b00000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 87;
128'b00000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 88;
128'b00000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 89;
128'b00000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 90;
128'b00000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 91;
128'b00000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 92;
128'b00000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 93;
128'b00000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 94;
128'b00000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 95;
128'b00000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 96;
128'b00000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 97;
128'b00000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 98;
128'b00000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 99;
128'b00000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 100;
128'b00000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 101;
128'b00000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 102;
128'b00000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 103;
128'b00000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 104;
128'b00000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 105;
128'b00000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 106;
128'b00000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 107;
128'b00000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 108;
128'b00000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 109;
128'b00000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 110;
128'b00000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 111;
128'b00000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 112;
128'b00000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 113;
128'b00000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 114;
128'b00000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 115;
128'b00000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 116;
128'b00000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 117;
128'b00000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 118;
128'b00000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 119;
128'b00000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 120;
128'b00000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 121;
128'b00000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 122;
128'b00001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 123;
128'b00010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 124;
128'b00100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 125;
128'b01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 126;
128'b10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000: out = 127;
default : out = 0;
endcase
end
endmodule
////////////////////////////////////////////////////////////////////////////////////////////
symplify 9.6 综合后的资源使用量xilinx约是altera的5倍
Design view:work.decode(verilog)
Selecting part EP1C12F324C6
I/O ATOMs: 135
Total LUTs: 712 of 12060 ( 5%)
Logic resources: 712 ATOMs of 12060 ( 5%)
Number of I/O registers
Output DDRs :0
ATOM count by mode:
normal: 712
arithmetic: 0
ShiftTap: 0 (0 registers)
Total ESB: 0 bits (0% of 239616)
ATOMs using regout pin: 0
also using enable pin: 0
also using combout pin: 0
ATOMs using combout pin: 712
Number of Inputs on ATOMs: 2571
Number of Nets: 830450
Resource Usage Report for decode </a>
//////////////////////////////////////////
Mapping to part: xc3s700afg400-4
Cell usage:
BUF 2 uses
GND 1 use
MUXCY 134 uses
MUXCY_L 4042 uses
MUXF5 1 use
VCC 1 use
LUT1 2860 uses
LUT2 96 uses
LUT3 1147 uses
LUT4 277 uses
I/O ports: 135
I/O primitives: 135
IBUF 128 uses
OBUF 7 uses
I/O Register bits: 0
Register bits not including I/Os: 0 (0%)
Total load per clock:
Mapping Summary:
Total LUTs: 4380 (37%)
/////////////////////////////////////////////////////
若使用各自自身的综合器，资源使用量xilinx约是altera的10倍.
是量级上的差距啊！ |
阿莫论坛20周年了！感谢大家的支持与爱护！！
知道什么是神吗？其实神本来也是人，只不过神做了人做不到的事情 所以才成了神。 （头文字D, 杜汶泽）
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发表于 2011-1-21 20:04:30
楼主