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Name change for arbiter
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/* Simple combinatorial priority arbiter
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* (lowest position has highest priority)
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* bit[0] has highest priority
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*
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*/
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module oh_arbiter_static(/*AUTOARG*/
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// Outputs
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grant, await,
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grants, waits,
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// Inputs
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request
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requests
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);
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parameter ARW=99;
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parameter N=99;
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input [ARW-1:0] request; //request vector
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output [ARW-1:0] grant; //grant (one hot)
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output [ARW-1:0] await; //wait mask!
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input [N-1:0] requests; //request vector
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output [N-1:0] grants; //grant (one hot)
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output [N-1:0] waits; //wait mask!
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genvar j;
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assign await[0] = 1'b0;
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generate for (j=ARW-1; j>=1; j=j-1) begin : gen_arbiter
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assign await[j] = |request[j-1:0];
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end
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genvar j;
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wire [N-1:0] waitmask;
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assign waitmask[0] = 1'b0;
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generate for (j=N-1; j>=1; j=j-1)
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begin : gen_arbiter
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assign waitmask[j] = |requests[j-1:0];
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end
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endgenerate
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//grant circuit
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assign grant[ARW-1:0] = request[ARW-1:0] & ~await[ARW-1:0];
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assign grants[N-1:0] = requests[N-1:0] & ~waitmask[N-1:0];
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assign waits[N-1:0] = requests[N-1:0] & ~grants[N-1:0];
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endmodule // oh_arbiter_priority
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