diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/rtl/montprod.v | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/src/rtl/montprod.v b/src/rtl/montprod.v index 279f5aa..12260ac 100644 --- a/src/rtl/montprod.v +++ b/src/rtl/montprod.v @@ -138,6 +138,9 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) reg first_iteration_new; reg first_iteration_we; + reg test_reg; + reg test_new; + //---------------------------------------------------------------- // Wires. @@ -170,7 +173,6 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) // Temporary debug wires. reg [1 : 0] state_trace; reg [1 : 0] mux_trace; - reg s_mem_we; //---------------------------------------------------------------- @@ -196,7 +198,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) .clk(clk), .read_addr(s_mem_read_addr), .read_data(s_mem_read_data), - .wr(s_mem_we_reg | s_mem_we), + .wr(s_mem_we_reg), .write_addr(s_mem_write_addr), .write_data(s_mem_write_data) ); @@ -237,6 +239,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) begin : reg_update if (!reset_n) begin + test_reg <= 1'b1; ready_reg <= 1'b1; loop_ctr_reg <= 13'h0; word_index_reg <= {ADW{1'b0}}; @@ -255,6 +258,8 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) end else begin + test_reg <= test_new; + s_mem_read_addr_reg <= s_mem_read_addr; s_mem_we_reg <= s_mem_we_new; s_mux_reg <= s_mux_new; @@ -311,10 +316,11 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) s_mem_write_addr = s_mem_read_addr_reg; s_mem_write_data = {OPW{1'b0}}; s_mem_we_new = 1'b0; - s_mem_we = 1'b0; state_trace = 0; mux_trace = 0; tmp_s_mem_write_data = {OPW{1'b0}}; + test_new = 1'b0; + case (montprod_ctrl_reg) CTRL_LOOP_ITER: @@ -326,7 +332,8 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) begin //s = (s + q*M + b*A) >>> 1;, if(b==1) S+= A. Takes (1..length) cycles. s_mem_we_new = b_reg | q_reg | first_iteration_reg; - state_trace = 1; + state_trace = 1; + test_new = 1'b1; end CTRL_CALC_SDIV2: @@ -345,7 +352,6 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) SMUX_ADD: begin mux_trace = 1; - s_mem_we = b_reg | q_reg | first_iteration_reg; if (first_iteration_reg) muxed_s_mem_read_data = {OPW{1'b0}}; @@ -374,7 +380,6 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) SMUX_SHR: begin - s_mem_we = 1'b1; shr_data_in = s_mem_read_data; s_mem_write_data = shr_data_out; shr_carry_in_new = shr_carry_out; @@ -533,7 +538,6 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) CTRL_CALC_ADD: begin s_mux_new = SMUX_ADD; - dec_word_index = 1'b1; if (word_index_reg == 0) begin @@ -541,6 +545,10 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) montprod_ctrl_new = CTRL_STALLPIPE_ADD; montprod_ctrl_we = 1'b1; end + else + begin + dec_word_index = 1'b1; + end end CTRL_STALLPIPE_ADD: @@ -555,13 +563,14 @@ module montprod #(parameter OPW = 32, parameter ADW = 8) CTRL_CALC_SDIV2: begin s_mux_new = SMUX_SHR; - inc_word_index = 1'b1; if (word_index_reg == length_m1) begin montprod_ctrl_new = CTRL_STALLPIPE_SDIV2; montprod_ctrl_we = 1'b1; end + else + inc_word_index = 1'b1; end CTRL_STALLPIPE_SDIV2: |