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Improved timing for "decoded_imm_uj"

This commit is contained in:
Clifford Wolf 2015-06-07 22:50:49 +02:00
parent 06ba3a1a57
commit 32208c0b70
1 changed files with 3 additions and 4 deletions
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7
picorv32.v
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@ -159,13 +159,10 @@ module picorv32 #(
wire instr_trap; wire instr_trap;
reg [regindex_bits-1:0] decoded_rd, decoded_rs1, decoded_rs2; reg [regindex_bits-1:0] decoded_rd, decoded_rs1, decoded_rs2;
reg [31:0] decoded_imm; reg [31:0] decoded_imm, decoded_imm_uj;
reg decoder_trigger; reg decoder_trigger;
reg decoder_pseudo_trigger; reg decoder_pseudo_trigger;
wire [31:0] decoded_imm_uj;
assign { decoded_imm_uj[31:20], decoded_imm_uj[10:1], decoded_imm_uj[11], decoded_imm_uj[19:12], decoded_imm_uj[0] } = $signed({mem_rdata[31:12], 1'b0});
reg is_lui_auipc_jal; reg is_lui_auipc_jal;
reg is_lb_lh_lw_lbu_lhu; reg is_lb_lh_lw_lbu_lhu;
reg is_slli_srli_srai; reg is_slli_srli_srai;
@ -307,6 +304,8 @@ module picorv32 #(
instr_rdinstr <= (mem_rdata[6:0] == 7'b1110011 && mem_rdata[31:12] == 'b11000000001000000010) && ENABLE_COUNTERS; instr_rdinstr <= (mem_rdata[6:0] == 7'b1110011 && mem_rdata[31:12] == 'b11000000001000000010) && ENABLE_COUNTERS;
instr_rdinstrh <= (mem_rdata[6:0] == 7'b1110011 && mem_rdata[31:12] == 'b11001000001000000010) && ENABLE_COUNTERS; instr_rdinstrh <= (mem_rdata[6:0] == 7'b1110011 && mem_rdata[31:12] == 'b11001000001000000010) && ENABLE_COUNTERS;
{ decoded_imm_uj[31:20], decoded_imm_uj[10:1], decoded_imm_uj[11], decoded_imm_uj[19:12], decoded_imm_uj[0] } <= $signed({mem_rdata[31:12], 1'b0});
decoded_rd <= mem_rdata[11:7]; decoded_rd <= mem_rdata[11:7];
decoded_rs1 <= mem_rdata[19:15]; decoded_rs1 <= mem_rdata[19:15];
decoded_rs2 <= mem_rdata[24:20]; decoded_rs2 <= mem_rdata[24:20];