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fix: compressed decoder

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Output the original instruction for `0x0000` cases.
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Hao 2025-01-06 12:30:23 +08:00 • committed by GitHub
parent 8f4c75c5e4
commit 6372c810b0
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1 changed files with 4 additions and 1 deletions
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rtl/ibex_compressed_decoder.sv
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@ -47,7 +47,10 @@ module ibex_compressed_decoder (
// c.addi4spn -> addi rd', x2, imm
instr_o = {2'b0, instr_i[10:7], instr_i[12:11], instr_i[5],
instr_i[6], 2'b00, 5'h02, 3'b000, 2'b01, instr_i[4:2], {OPCODE_OP_IMM}};
if (instr_i[12:5] == 8'b0) illegal_instr_o = 1'b1;
if (instr_i[12:5] == 8'b0) begin
illegal_instr_o = 1'b1;
instr_o = instr_i;
end
end
3'b010: begin