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decoder.sv: add checks for some B instructions (fix #2276) (#2282)

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André Sintzoff 2024-06-21 10:54:10 +02:00 • committed by GitHub
parent 96ae8ed223
commit 21733e55d7
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1 changed files with 6 additions and 5 deletions
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11
core/decoder.sv
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@ -904,11 +904,12 @@ module decoder
unique case (instr.itype.funct3)
3'b001: begin
if (instr.instr[31:25] == 7'b0110000) begin
if (instr.instr[22:20] == 3'b100) instruction_o.op = ariane_pkg::SEXTB;
else if (instr.instr[22:20] == 3'b101) instruction_o.op = ariane_pkg::SEXTH;
else if (instr.instr[22:20] == 3'b010) instruction_o.op = ariane_pkg::CPOP;
else if (instr.instr[22:20] == 3'b000) instruction_o.op = ariane_pkg::CLZ;
else if (instr.instr[22:20] == 3'b001) instruction_o.op = ariane_pkg::CTZ;
if (instr.instr[24:20] == 5'b00100) instruction_o.op = ariane_pkg::SEXTB;
else if (instr.instr[24:20] == 5'b00101) instruction_o.op = ariane_pkg::SEXTH;
else if (instr.instr[24:20] == 5'b00010) instruction_o.op = ariane_pkg::CPOP;
else if (instr.instr[24:20] == 5'b00000) instruction_o.op = ariane_pkg::CLZ;
else if (instr.instr[24:20] == 5'b00001) instruction_o.op = ariane_pkg::CTZ;
else illegal_instr_bm = 1'b1;
end else if (instr.instr[31:26] == 6'b010010) instruction_o.op = ariane_pkg::BCLRI;
else if (instr.instr[31:26] == 6'b011010) instruction_o.op = ariane_pkg::BINVI;
else if (instr.instr[31:26] == 6'b001010) instruction_o.op = ariane_pkg::BSETI;