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Move CSR immediate decoder to immdec

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Olof Kindgren
2020-06-14 01:07:19 +02:00
parent 8775b321d9
commit 1c4e793885
3 changed files with 10 additions and 12 deletions
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10
rtl/serv_decode.v
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@@ -3,7 +3,6 @@ module serv_decode
(
input wire clk,
//Input
input wire i_cnt_en,
input wire [31:2] i_wb_rdt,
input wire i_wb_en,
//To state
@@ -51,7 +50,7 @@ module serv_decode
output wire o_csr_mcause_en,
output wire [1:0] o_csr_source,
output wire o_csr_d_sel,
output wire o_csr_imm,
output wire o_csr_imm_en,
//To top
output wire [3:0] o_immdec_ctrl,
output wire o_op_b_source,
@@ -146,7 +145,7 @@ module serv_decode
assign o_csr_source = funct3[1:0];
assign o_csr_d_sel = funct3[2];
assign o_csr_imm = o_rf_rs1_addr[0];
assign o_csr_imm_en = csr_op & o_csr_d_sel;
assign o_csr_addr = (op26 & !op20) ? CSR_MSCRATCH :
(op26 & !op21) ? CSR_MEPC :
@@ -191,11 +190,6 @@ module serv_decode
op21 <= i_wb_rdt[21];
op22 <= i_wb_rdt[22];
op26 <= i_wb_rdt[26];
end
if (i_cnt_en) begin
if (csr_op & o_csr_d_sel)
o_rf_rs1_addr <= {1'b0,o_rf_rs1_addr[4:1]};
end
end