2019-02-07 22:54:06 +01:00
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/******************************************************************************
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* 1X
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*
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*
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*/
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2019-02-08 19:09:13 +01:00
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`include "decstates.v"
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`DEC_1X: begin
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2019-02-09 19:18:58 +01:00
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case (nb_in)
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4'h3: decstate <= `DEC_13X;
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2019-02-08 19:09:13 +01:00
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4'h4: decstate <= `DEC_14X;
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2019-02-09 11:53:45 +01:00
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4'h5: decstate <= `DEC_15X;
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2019-02-10 13:39:56 +01:00
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4'h6, 4'h7, 4'h8, 4'hC: begin
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2019-02-11 10:41:34 +01:00
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t_ptr <= (nb_in[0] && nb_in[1]) || (nb_in[2] && nb_in[3]);
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2019-02-10 13:39:56 +01:00
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t_add_sub <= nb_in[3];
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decstate <= `DEC_PTR_MATH;
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end
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2019-02-10 23:00:20 +01:00
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4'h9: decstate <= `DEC_D0_EQ_2N;
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2019-02-10 12:47:50 +01:00
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4'hA: decstate <= `DEC_D0_EQ_4N;
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2019-02-09 09:49:22 +01:00
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4'hB: decstate <= `DEC_D0_EQ_5N;
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2019-02-10 23:00:20 +01:00
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4'hD: decstate <= `DEC_D1_EQ_2N;
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2019-02-09 11:53:45 +01:00
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4'hE: decstate <= `DEC_D1_EQ_4N;
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2019-02-09 09:49:22 +01:00
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4'hF: decstate <= `DEC_D1_EQ_5N;
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2019-02-08 19:09:13 +01:00
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default: begin
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2019-02-10 13:39:56 +01:00
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$display("ERROR : DEC_1X %h", nb_in);
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2019-02-08 19:09:13 +01:00
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decode_error <= 1;
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end
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endcase
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end
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