diff options
Diffstat (limited to 'src/rtl/sha512_core.v')
| -rw-r--r-- | src/rtl/sha512_core.v | 64 |
1 files changed, 33 insertions, 31 deletions
diff --git a/src/rtl/sha512_core.v b/src/rtl/sha512_core.v index 9454f40..01f124d 100644 --- a/src/rtl/sha512_core.v +++ b/src/rtl/sha512_core.v @@ -126,11 +126,11 @@ module sha512_core( reg [63 : 0] H7_new; reg H_we; - reg [6 : 0] t_ctr_reg; - reg [6 : 0] t_ctr_new; - reg t_ctr_we; - reg t_ctr_inc; - reg t_ctr_rst; + reg [6 : 0] round_ctr_reg; + reg [6 : 0] round_ctr_new; + reg round_ctr_we; + reg round_ctr_inc; + reg round_ctr_rst; reg [31 : 0] work_factor_ctr_reg; reg [31 : 0] work_factor_ctr_new; @@ -147,6 +147,7 @@ module sha512_core( reg [1 : 0] sha512_ctrl_new; reg sha512_ctrl_we; + reg [63 : 0] t1_reg; //---------------------------------------------------------------- // Wires. @@ -184,7 +185,7 @@ module sha512_core( // Module instantiantions. //---------------------------------------------------------------- sha512_k_constants k_constants_inst( - .addr(t_ctr_reg), + .addr(round_ctr_reg), .K(k_data) ); @@ -254,11 +255,14 @@ module sha512_core( H7_reg <= 64'h0000000000000000; work_factor_ctr_reg <= 32'h00000000; digest_valid_reg <= 0; - t_ctr_reg <= 7'h00; + round_ctr_reg <= 7'h0; sha512_ctrl_reg <= CTRL_IDLE; + t1_reg <= 64'h0; end else begin + t1_reg <= t1; + if (a_h_we) begin a_reg <= a_new; @@ -331,9 +335,9 @@ module sha512_core( if (state15_we) H7_reg <= {H7_reg[63 : 32], state_wr_data}; - if (t_ctr_we) + if (round_ctr_we) begin - t_ctr_reg <= t_ctr_new; + round_ctr_reg <= round_ctr_new; end if (work_factor_ctr_we) @@ -501,28 +505,28 @@ module sha512_core( //---------------------------------------------------------------- - // t_ctr + // round_ctr // // Update logic for the round counter, a monotonically // increasing counter with reset. //---------------------------------------------------------------- always @* - begin : t_ctr - t_ctr_new = 7'h00; - t_ctr_we = 0; + begin : round_ctr + round_ctr_new = 7'h0; + round_ctr_we = 0; - if (t_ctr_rst) + if (round_ctr_rst) begin - t_ctr_new = 7'h00; - t_ctr_we = 1; + round_ctr_new = 7'h00; + round_ctr_we = 1; end - if (t_ctr_inc) + if (round_ctr_inc) begin - t_ctr_new = t_ctr_reg + 1'b1; - t_ctr_we = 1; + round_ctr_new = round_ctr_reg + 1'b1; + round_ctr_we = 1; end - end // t_ctr + end // round_ctr //---------------------------------------------------------------- @@ -567,7 +571,6 @@ module sha512_core( state_init = 0; state_update = 0; - t1_we = 0; first_block = 0; ready_flag = 0; @@ -575,8 +578,8 @@ module sha512_core( w_init = 0; w_next = 0; - t_ctr_inc = 0; - t_ctr_rst = 0; + round_ctr_inc = 0; + round_ctr_rst = 0; digest_valid_new = 0; digest_valid_we = 0; @@ -600,7 +603,7 @@ module sha512_core( w_init = 1; state_init = 1; first_block = 1; - t_ctr_rst = 1; + round_ctr_rst = 1; digest_valid_new = 0; digest_valid_we = 1; sha512_ctrl_new = CTRL_ROUNDS1; @@ -612,7 +615,7 @@ module sha512_core( work_factor_ctr_rst = 1; w_init = 1; state_init = 1; - t_ctr_rst = 1; + round_ctr_rst = 1; digest_valid_new = 0; digest_valid_we = 1; sha512_ctrl_new = CTRL_ROUNDS1; @@ -623,7 +626,6 @@ module sha512_core( CTRL_ROUNDS1: begin - t1_we = 1; sha512_ctrl_new = CTRL_ROUNDS2; sha512_ctrl_we = 1; end @@ -631,11 +633,11 @@ module sha512_core( CTRL_ROUNDS2: begin - w_next = 1; - state_update = 1; - t_ctr_inc = 1; + w_next = 1; + state_update = 1; + round_ctr_inc = 1; - if (t_ctr_reg == SHA512_ROUNDS) + if (round_ctr_reg == SHA512_ROUNDS) begin work_factor_ctr_inc = 1; sha512_ctrl_new = CTRL_DONE; @@ -651,7 +653,7 @@ module sha512_core( begin w_init = 1; state_init = 1; - t_ctr_rst = 1; + round_ctr_rst = 1; sha512_ctrl_new = CTRL_ROUNDS1; sha512_ctrl_we = 1; end |