diff options
Diffstat (limited to 'src/rtl/sha512_w_mem.v')
| -rw-r--r-- | src/rtl/sha512_w_mem.v | 153 |
1 files changed, 51 insertions, 102 deletions
diff --git a/src/rtl/sha512_w_mem.v b/src/rtl/sha512_w_mem.v index 15fd564..e0a6775 100644 --- a/src/rtl/sha512_w_mem.v +++ b/src/rtl/sha512_w_mem.v @@ -82,12 +82,6 @@ module sha512_w_mem( reg [6 : 0] w_ctr_reg; reg [6 : 0] w_ctr_new; reg w_ctr_we; - reg w_ctr_inc; - reg w_ctr_rst; - - reg sha512_w_mem_ctrl_reg; - reg sha512_w_mem_ctrl_new; - reg sha512_w_mem_ctrl_we; //---------------------------------------------------------------- @@ -113,24 +107,23 @@ module sha512_w_mem( begin : reg_update if (!reset_n) begin - w_mem[00] <= 64'h0000000000000000; - w_mem[01] <= 64'h0000000000000000; - w_mem[02] <= 64'h0000000000000000; - w_mem[03] <= 64'h0000000000000000; - w_mem[04] <= 64'h0000000000000000; - w_mem[05] <= 64'h0000000000000000; - w_mem[06] <= 64'h0000000000000000; - w_mem[07] <= 64'h0000000000000000; - w_mem[08] <= 64'h0000000000000000; - w_mem[09] <= 64'h0000000000000000; - w_mem[10] <= 64'h0000000000000000; - w_mem[11] <= 64'h0000000000000000; - w_mem[12] <= 64'h0000000000000000; - w_mem[13] <= 64'h0000000000000000; - w_mem[14] <= 64'h0000000000000000; - w_mem[15] <= 64'h0000000000000000; + w_mem[00] <= 64'h0; + w_mem[01] <= 64'h0; + w_mem[02] <= 64'h0; + w_mem[03] <= 64'h0; + w_mem[04] <= 64'h0; + w_mem[05] <= 64'h0; + w_mem[06] <= 64'h0; + w_mem[07] <= 64'h0; + w_mem[08] <= 64'h0; + w_mem[09] <= 64'h0; + w_mem[10] <= 64'h0; + w_mem[11] <= 64'h0; + w_mem[12] <= 64'h0; + w_mem[13] <= 64'h0; + w_mem[14] <= 64'h0; + w_mem[15] <= 64'h0; w_ctr_reg <= 7'h00; - sha512_w_mem_ctrl_reg <= CTRL_IDLE; end else begin @@ -158,11 +151,6 @@ module sha512_w_mem( begin w_ctr_reg <= w_ctr_new; end - - if (sha512_w_mem_ctrl_we) - begin - sha512_w_mem_ctrl_reg <= sha512_w_mem_ctrl_new; - end end end // reg_update @@ -201,39 +189,24 @@ module sha512_w_mem( reg [63 : 0] d0; reg [63 : 0] d1; - w_mem00_new = 64'h0000000000000000; - w_mem01_new = 64'h0000000000000000; - w_mem02_new = 64'h0000000000000000; - w_mem03_new = 64'h0000000000000000; - w_mem04_new = 64'h0000000000000000; - w_mem05_new = 64'h0000000000000000; - w_mem06_new = 64'h0000000000000000; - w_mem07_new = 64'h0000000000000000; - w_mem08_new = 64'h0000000000000000; - w_mem09_new = 64'h0000000000000000; - w_mem10_new = 64'h0000000000000000; - w_mem11_new = 64'h0000000000000000; - w_mem12_new = 64'h0000000000000000; - w_mem13_new = 64'h0000000000000000; - w_mem14_new = 64'h0000000000000000; - w_mem15_new = 64'h0000000000000000; + w_mem00_new = 64'h0; + w_mem01_new = 64'h0; + w_mem02_new = 64'h0; + w_mem03_new = 64'h0; + w_mem04_new = 64'h0; + w_mem05_new = 64'h0; + w_mem06_new = 64'h0; + w_mem07_new = 64'h0; + w_mem08_new = 64'h0; + w_mem09_new = 64'h0; + w_mem10_new = 64'h0; + w_mem11_new = 64'h0; + w_mem12_new = 64'h0; + w_mem13_new = 64'h0; + w_mem14_new = 64'h0; + w_mem15_new = 64'h0; w_mem_we = 0; - w_0 = w_mem[0]; - w_1 = w_mem[1]; - w_9 = w_mem[9]; - w_14 = w_mem[14]; - - d0 = {w_1[0], w_1[63 : 1]} ^ // ROTR1 - {w_1[7 : 0], w_1[63 : 8]} ^ // ROTR8 - {7'b0000000, w_1[63 : 7]}; // SHR7 - - d1 = {w_14[18 : 0], w_14[63 : 19]} ^ // ROTR19 - {w_14[60 : 0], w_14[63 : 61]} ^ // ROTR61 - {6'b000000, w_14[63 : 6]}; // SHR6 - - w_new = w_0 + d0 + w_9 + d1; - if (init) begin w_mem00_new = block[1023 : 960]; @@ -254,7 +227,23 @@ module sha512_w_mem( w_mem15_new = block[63 : 0]; w_mem_we = 1; end - else if (w_ctr_reg > 15) + + w_0 = w_mem[0]; + w_1 = w_mem[1]; + w_9 = w_mem[9]; + w_14 = w_mem[14]; + + d0 = {w_1[0], w_1[63 : 1]} ^ // ROTR1 + {w_1[7 : 0], w_1[63 : 8]} ^ // ROTR8 + {7'b0000000, w_1[63 : 7]}; // SHR7 + + d1 = {w_14[18 : 0], w_14[63 : 19]} ^ // ROTR19 + {w_14[60 : 0], w_14[63 : 61]} ^ // ROTR61 + {6'b000000, w_14[63 : 6]}; // SHR6 + + w_new = w_0 + d0 + w_9 + d1; + + if (next && (w_ctr_reg > 15)) begin w_mem00_new = w_mem[01]; w_mem01_new = w_mem[02]; @@ -287,59 +276,19 @@ module sha512_w_mem( w_ctr_new = 0; w_ctr_we = 0; - if (w_ctr_rst) + if (init) begin w_ctr_new = 7'h00; w_ctr_we = 1; end - if (w_ctr_inc) + if (next) begin w_ctr_new = w_ctr_reg + 7'h01; w_ctr_we = 1; end end // w_ctr - - //---------------------------------------------------------------- - // sha512_w_mem_fsm - // Logic for the w shedule FSM. - //---------------------------------------------------------------- - always @* - begin : sha512_w_mem_fsm - w_ctr_rst = 0; - w_ctr_inc = 0; - - sha512_w_mem_ctrl_new = CTRL_IDLE; - sha512_w_mem_ctrl_we = 0; - - case (sha512_w_mem_ctrl_reg) - CTRL_IDLE: - begin - if (init) - begin - w_ctr_rst = 1; - sha512_w_mem_ctrl_new = CTRL_UPDATE; - sha512_w_mem_ctrl_we = 1; - end - end - - CTRL_UPDATE: - begin - if (next) - begin - w_ctr_inc = 1; - end - - if (w_ctr_reg == 7'h3f) - begin - sha512_w_mem_ctrl_new = CTRL_IDLE; - sha512_w_mem_ctrl_we = 1; - end - end - endcase // case (sha512_ctrl_reg) - end // sha512_ctrl_fsm - endmodule // sha512_w_mem //====================================================================== |