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-- #################################################################################################
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-- #################################################################################################
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-- # << NEORV32 - CPU Compressed Instructions (C-extension) Decoder >> #
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-- # << NEORV32 - CPU Compressed Instructions (RISC-V C-extension) Decoder >> #
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-- # ********************************************************************************************* #
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-- # ********************************************************************************************* #
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-- # BSD 3-Clause License #
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-- # BSD 3-Clause License #
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-- # #
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-- # #
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-- # Copyright (c) 2020, Stephan Nolting. All rights reserved. #
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-- # Copyright (c) 2020, Stephan Nolting. All rights reserved. #
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-- # #
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-- # #
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ci_instr32_o(instr_funct3_msb_c downto instr_funct3_lsb_c) <= funct3_subadd_c;
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ci_instr32_o(instr_funct3_msb_c downto instr_funct3_lsb_c) <= funct3_subadd_c;
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= ci_instr16_i(ci_rd_5_msb_c downto ci_rd_5_lsb_c);
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= ci_instr16_i(ci_rd_5_msb_c downto ci_rd_5_lsb_c);
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ci_instr32_o(instr_rs1_msb_c downto instr_rs1_lsb_c) <= "00010"; -- stack pointer
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ci_instr32_o(instr_rs1_msb_c downto instr_rs1_lsb_c) <= "00010"; -- stack pointer
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= "00010"; -- stack pointer
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= "00010"; -- stack pointer
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ci_instr32_o(instr_imm12_msb_c downto instr_imm12_lsb_c) <= (others => ci_instr16_i(12)); -- sign extend
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ci_instr32_o(instr_imm12_msb_c downto instr_imm12_lsb_c) <= (others => ci_instr16_i(12)); -- sign extend
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ci_instr32_o(instr_imm12_lsb_c + 00) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 0) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 01) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 1) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 02) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 2) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 03) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 3) <= '0';
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ci_instr32_o(instr_imm12_lsb_c + 04) <= ci_instr16_i(6);
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ci_instr32_o(instr_imm12_lsb_c + 4) <= ci_instr16_i(6);
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ci_instr32_o(instr_imm12_lsb_c + 05) <= ci_instr16_i(2);
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ci_instr32_o(instr_imm12_lsb_c + 5) <= ci_instr16_i(2);
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ci_instr32_o(instr_imm12_lsb_c + 06) <= ci_instr16_i(5);
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ci_instr32_o(instr_imm12_lsb_c + 6) <= ci_instr16_i(5);
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ci_instr32_o(instr_imm12_lsb_c + 07) <= ci_instr16_i(3);
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ci_instr32_o(instr_imm12_lsb_c + 7) <= ci_instr16_i(3);
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ci_instr32_o(instr_imm12_lsb_c + 08) <= ci_instr16_i(4);
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ci_instr32_o(instr_imm12_lsb_c + 8) <= ci_instr16_i(4);
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ci_instr32_o(instr_imm12_lsb_c + 09) <= ci_instr16_i(12);
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ci_instr32_o(instr_imm12_lsb_c + 9) <= ci_instr16_i(12);
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else -- C.LUI
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else -- C.LUI
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ci_instr32_o(instr_opcode_msb_c downto instr_opcode_lsb_c) <= opcode_lui_c;
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ci_instr32_o(instr_opcode_msb_c downto instr_opcode_lsb_c) <= opcode_lui_c;
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= ci_instr16_i(ci_rd_5_msb_c downto ci_rd_5_lsb_c);
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ci_instr32_o(instr_rd_msb_c downto instr_rd_lsb_c) <= ci_instr16_i(ci_rd_5_msb_c downto ci_rd_5_lsb_c);
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ci_instr32_o(instr_imm20_msb_c downto instr_imm20_lsb_c) <= (others => ci_instr16_i(12)); -- sign extend
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ci_instr32_o(instr_imm20_msb_c downto instr_imm20_lsb_c) <= (others => ci_instr16_i(12)); -- sign extend
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