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// ============================================================================
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// ============================================================================
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// __
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// __
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// \\__/ o\ (C) 2017-2018 Robert Finch, Waterloo
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// \\__/ o\ (C) 2017-2019 Robert Finch, Waterloo
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// \ __ / All rights reserved.
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// \ __ / All rights reserved.
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// \/_// robfinch<remove>@finitron.ca
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// \/_// robfinch<remove>@finitron.ca
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// ||
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// ||
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//
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//
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// FT64_iexpander.v
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// FT64_iexpander.v
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expand[25:23] = 3'b011; // word size
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expand[25:23] = 3'b011; // word size
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[7:6] = 2'b10;
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expand[7:6] = 2'b10;
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expand[5:0] = 8'h02; // R2 instruction
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expand[5:0] = 6'h02; // R2 instruction
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end
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end
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2'd1: begin
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2'd1: begin
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expand[47:32] = 16'h0000;
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expand[47:32] = 16'h0000;
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expand[31:26] = `AND;
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expand[31:26] = `AND;
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expand[25:23] = 3'b011; // word size
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expand[25:23] = 3'b011; // word size
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[7:6] = 2'b10;
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expand[7:6] = 2'b10;
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expand[5:0] = 8'h02; // R2 instruction
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expand[5:0] = 6'h02; // R2 instruction
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end
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end
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2'd2: begin
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2'd2: begin
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expand[47:32] = 16'h0000;
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expand[47:32] = 16'h0000;
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expand[31:26] = `OR;
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expand[31:26] = `OR;
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expand[25:23] = 3'b011; // word size
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expand[25:23] = 3'b011; // word size
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[7:6] = 2'b10;
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expand[7:6] = 2'b10;
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expand[5:0] = 8'h02; // R2 instruction
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expand[5:0] = 6'h02; // R2 instruction
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end
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end
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2'd3: begin
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2'd3: begin
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expand[47:32] = 16'h0000;
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expand[47:32] = 16'h0000;
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expand[31:26] = `XOR;
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expand[31:26] = `XOR;
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expand[25:23] = 3'b011; // word size
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expand[25:23] = 3'b011; // word size
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[22:18] = fnRp({cinstr[9:8],cinstr[3]});
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[17:13] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[12:8] = fnRp(cinstr[2:0]);
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expand[7:6] = 2'b10;
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expand[7:6] = 2'b10;
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expand[5:0] = 8'h02; // R2 instruction
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expand[5:0] = 6'h02; // R2 instruction
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end
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end
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endcase
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endcase
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endcase
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endcase
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5'b01110:
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5'b01110:
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begin
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begin
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expand[47:32] = 16'h0000;
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expand[47:32] = 16'h0000;
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expand[31:23] = {{1{cinstr[11]}},{cinstr[11:8],cinstr[5:2]}};
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expand[31:23] = {{1{cinstr[11]}},{cinstr[11:8],cinstr[5:2]}};
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expand[22:18] = 5'd0; // Rb = 0
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expand[22:18] = 5'd0; // Rb = 0
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expand[17:16] = cinstr[1:0];
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expand[17:16] = cinstr[1:0];
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expand[15:13] = 3'd0; // BEQ
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expand[15:13] = 3'd0; // BEQ
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expand[12:8] = 5'd0; // r0==r0
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expand[12:8] = 5'd0; // Ra = r0
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expand[7:6] = 2'b10;
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expand[7:6] = 2'b10;
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expand[5:0] = `Bcc; // 0x38
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expand[5:0] = `Bcc; // 0x38
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end
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end
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5'b10??0:
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5'b10??0:
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begin
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begin
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