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-rw-r--r--src/tb/modexp_fpga_model_vectors.v80
-rw-r--r--src/tb/tb_exponentiator.v139
2 files changed, 215 insertions, 4 deletions
diff --git a/src/tb/modexp_fpga_model_vectors.v b/src/tb/modexp_fpga_model_vectors.v
index d5284c9..c86f7ba 100644
--- a/src/tb/modexp_fpga_model_vectors.v
+++ b/src/tb/modexp_fpga_model_vectors.v
@@ -40,6 +40,46 @@ localparam [383:0] S_384 =
32'ha76b945b, 32'h49a3f645, 32'h76801499, 32'hb98e6a16,
32'hd2467b6a, 32'h75b7d614, 32'h0fff0fde, 32'hb31d1819};
+localparam [191:0] P_192 =
+ {32'he9ac4cf6, 32'h03b2d80a, 32'h7f1d091e, 32'h49d5f1a0,
+ 32'hac2ae4ff, 32'hbf9bf375};
+
+localparam [191:0] Q_192 =
+ {32'hc1468f3e, 32'hc6909231, 32'h5a4d74ba, 32'h477b303f,
+ 32'h4b2e10d1, 32'h1f44e815};
+
+localparam [191:0] P_COEFF_192 =
+ {32'h8ba8d46c, 32'hb4ed830d, 32'hfbb97c6e, 32'h72d150d3,
+ 32'h72d21392, 32'h70d2fb23};
+
+localparam [191:0] Q_COEFF_192 =
+ {32'hd863905a, 32'hc1541c8a, 32'h25952b0e, 32'ha62b0348,
+ 32'h837f149f, 32'hd6cc58c3};
+
+localparam [191:0] FACTOR_P_192 =
+ {32'h886bad59, 32'h9bf7a46e, 32'h482ed232, 32'he55164cf,
+ 32'hcb46a9e8, 32'he9bd888b};
+
+localparam [191:0] FACTOR_Q_192 =
+ {32'h324b776e, 32'h3734d186, 32'h73dc8796, 32'h9e1aba2c,
+ 32'h4d5df285, 32'he97656b7};
+
+localparam [191:0] DP_192 =
+ {32'h69b6c286, 32'h95fbc613, 32'h51988034, 32'h8cb0d684,
+ 32'h9aff38e4, 32'h9ef9ddb5};
+
+localparam [191:0] DQ_192 =
+ {32'h1eda82b7, 32'h84bf4377, 32'h39712ff7, 32'h24be179f,
+ 32'ha302c190, 32'h80ab6159};
+
+localparam [191:0] MP_192 =
+ {32'h9e163bb5, 32'h35e718cb, 32'hcde52b7b, 32'h5db8552b,
+ 32'h46a300e0, 32'h34f91e6b};
+
+localparam [191:0] MQ_192 =
+ {32'h7b01a724, 32'h90f0d5f9, 32'h9e237ce5, 32'h6d31fd28,
+ 32'h4ecb9dad, 32'h58bf366a};
+
localparam [511:0] M_512 =
{32'h005536b6, 32'h43ea651f, 32'h2fd3c70a, 32'ha83659cb,
32'hd0c1f47b, 32'ha8033730, 32'h29c6b082, 32'h6db48613,
@@ -88,3 +128,43 @@ localparam [511:0] S_512 =
32'hfd1e029d, 32'hfe887387, 32'h4312635f, 32'hb2b54b8d,
32'h5d3b379e, 32'h161eaa4f, 32'hedfd932b, 32'h780f0203};
+localparam [255:0] P_256 =
+ {32'hfedea889, 32'h97cfdb79, 32'hcca87074, 32'he5abcda1,
+ 32'h3be201c4, 32'hc416fd15, 32'hf2130931, 32'h61ff5937};
+
+localparam [255:0] Q_256 =
+ {32'hf0889147, 32'h5aa60f93, 32'hb9927d86, 32'h8f795c5c,
+ 32'h8e98dcf2, 32'had3aad74, 32'h9441583a, 32'h967dce41};
+
+localparam [255:0] P_COEFF_256 =
+ {32'h7af63ffc, 32'h428d9408, 32'h86e79fb9, 32'h018dad77,
+ 32'h4ff704df, 32'h93effb1e, 32'h265d181a, 32'h47ae5379};
+
+localparam [255:0] Q_COEFF_256 =
+ {32'hd27f8aa0, 32'h9f2b9800, 32'h2dfd2392, 32'h4f868b9d,
+ 32'h0fc51e1d, 32'h022de65b, 32'ha55f9ad1, 32'h0676be3f};
+
+localparam [255:0] FACTOR_P_256 =
+ {32'h1a5f27a1, 32'h8d16b0cb, 32'h8c2751b8, 32'h106a099c,
+ 32'ha6efbadd, 32'hcb313a5f, 32'hf530eeb6, 32'hbbc7d8f5};
+
+localparam [255:0] FACTOR_Q_256 =
+ {32'h6794987c, 32'h932203a6, 32'h8c5b1e68, 32'h18d458e6,
+ 32'h6737f12a, 32'h664d4187, 32'hc4ec03ba, 32'h4bd3d0c2};
+
+localparam [255:0] DP_256 =
+ {32'h2504d437, 32'hfffbe9e5, 32'hfc0aef22, 32'h9b8563bd,
+ 32'haa83fe3b, 32'hc53b8d91, 32'h15731c5f, 32'hb6db2eeb};
+
+localparam [255:0] DQ_256 =
+ {32'hd3265fba, 32'h2eb65638, 32'h4d106ec7, 32'h000dfe69,
+ 32'h75f87505, 32'h47d299d0, 32'h1c115cdd, 32'h599ca8c1};
+
+localparam [255:0] MP_256 =
+ {32'h23359955, 32'hcad299b6, 32'h049bb248, 32'h3828b6a5,
+ 32'h74c85825, 32'h7dd8e109, 32'h07edbda9, 32'h4980c2c9};
+
+localparam [255:0] MQ_256 =
+ {32'h8578120b, 32'h91f4ca9e, 32'h371d3e70, 32'h0005bb89,
+ 32'hd31ed864, 32'h477bd9cf, 32'h65a1f03b, 32'h606d3bc8};
+
diff --git a/src/tb/tb_exponentiator.v b/src/tb/tb_exponentiator.v
index 16be0a5..440fedc 100644
--- a/src/tb/tb_exponentiator.v
+++ b/src/tb/tb_exponentiator.v
@@ -63,6 +63,8 @@ module tb_exponentiator;
reg rst_n;
reg ena;
+ reg crt;
+
reg [ 3: 0] n_num_words;
reg [ 8: 0] d_num_bits;
@@ -170,6 +172,8 @@ module tb_exponentiator;
.ena (ena),
.rdy (rdy),
+ .crt (crt),
+
.m_bram_addr (core_m_addr),
.d_bram_addr (core_d_addr),
.f_bram_addr (core_f_addr),
@@ -206,9 +210,14 @@ module tb_exponentiator;
#200;
rst_n = 1'b1;
#100;
-
- test_exponent_384(M_384, D_384, FACTOR_384, N_384, N_COEFF_384, S_384);
- test_exponent_512(M_512, D_512, FACTOR_512, N_512, N_COEFF_512, S_512);
+
+ // test "honest" exponentiation
+// test_exponent_384(M_384, D_384, FACTOR_384, N_384, N_COEFF_384, S_384);
+// test_exponent_512(M_512, D_512, FACTOR_512, N_512, N_COEFF_512, S_512);
+
+ // test crt mode
+ test_exponent_192(M_384, DP_192, FACTOR_P_192, P_192, P_COEFF_192, MP_192);
+ //test_exponent_192(M_384, DQ_192, FACTOR_Q_192, Q_192, Q_COEFF_192, MQ_192);
end
@@ -216,7 +225,6 @@ module tb_exponentiator;
//
// Test Tasks
//
-
task test_exponent_384;
//
input [383:0] m;
@@ -234,6 +242,8 @@ module tb_exponentiator;
n_num_words = 4'd11; // set number of words
d_num_bits = 9'd383; // set number of bits
//
+ crt = 0; // disable crt mode
+ //
write_memory_384(m, d, f, n, n_coeff); // fill memory
ena = 1; // start operation
@@ -276,6 +286,8 @@ module tb_exponentiator;
n_num_words = 4'd15; // set number of words
d_num_bits = 9'd511; // set number of bits
//
+ crt = 0; // disable crt mode
+ //
write_memory_512(m, d, f, n, n_coeff); // fill memory
ena = 1; // start operation
@@ -301,6 +313,49 @@ module tb_exponentiator;
//
endtask
+ task test_exponent_192;
+ //
+ input [383:0] m;
+ input [191:0] d;
+ input [191:0] f;
+ input [191:0] n;
+ input [191:0] n_coeff;
+ input [191:0] s;
+ reg [191:0] r;
+ //
+ integer i;
+ //
+ begin
+ //
+ n_num_words = 4'd5; // set number of words
+ d_num_bits = 9'd191; // set number of bits
+ //
+ crt = 1; // enable crt mode
+ //
+ write_memory_192(m, d, f, n, n_coeff); // fill memory
+
+ ena = 1; // start operation
+ #10; //
+ ena = 0; // clear flag
+
+ while (!rdy) #10; // wait for operation to complete
+ read_memory_192(r); // get result from memory
+
+ $display(" calculated: %x", r); // display result
+ $display(" expected: %x", s); //
+
+ // check calculated value
+ if (r === s) begin
+ $display(" OK");
+ $display("SUCCESS: Test passed.");
+ end else begin
+ $display(" ERROR");
+ $display("FAILURE: Test not passed.");
+ end
+ //
+ end
+ //
+ endtask
//
// write_memory_384
@@ -409,6 +464,59 @@ module tb_exponentiator;
//
+ // write_memory_192
+ //
+ task write_memory_192;
+ //
+ input [383:0] m;
+ input [191:0] d;
+ input [191:0] f;
+ input [191:0] n;
+ input [191:0] n_coeff;
+ reg [383:0] m_shreg;
+ reg [191:0] f_shreg;
+ reg [191:0] d_shreg;
+ reg [191:0] n_shreg;
+ reg [191:0] n_coeff_shreg;
+ //
+ begin
+ //
+ tb_mdfn_wren = 1; // start filling memories
+ m_shreg = m; // preload shift register
+ d_shreg = d; // preload shift register
+ f_shreg = f; // preload shift register
+ n_shreg = n; // preload shift register
+ n_coeff_shreg = n_coeff; // preload shift register
+ //
+ for (w=0; w<NUM_WORDS_384; w=w+1) begin // write all words
+ tb_mdfn_addr = w[3:0]; // set address
+ tb_m_data = m_shreg[31:0]; // set data
+ tb_d_data = d_shreg[31:0]; // set data
+ tb_f_data = f_shreg[31:0]; // set data
+ tb_n_data = n_shreg[31:0]; // set data
+ tb_n_coeff_data = n_coeff_shreg[31:0]; // set data
+ m_shreg = {{32{1'bX}}, m_shreg[383:32]}; // update shift register
+ d_shreg = {{32{1'bX}}, d_shreg[191:32]}; // update shift register
+ f_shreg = {{32{1'bX}}, f_shreg[191:32]}; // update shift register
+ n_shreg = {{32{1'bX}}, n_shreg[191:32]}; // update shift register
+ n_coeff_shreg = {{32{1'bX}}, n_coeff_shreg[191:32]}; // update shift register
+ #10; // wait for 1 clock tick
+ end
+ //
+ tb_mdfn_addr = {4{1'bX}}; // wipe addresses
+ tb_m_data = {32{1'bX}}; // wipe data
+ tb_d_data = {32{1'bX}}; // wipe data
+ tb_f_data = {32{1'bX}}; // wipe data
+ tb_n_data = {32{1'bX}}; // wipe data
+ tb_n_coeff_data = {32{1'bX}}; // wipe data
+ tb_mdfn_wren = 0; // stop filling memory
+ //
+ end
+ //
+ endtask
+
+
+ //
// read_memory_384
//
task read_memory_384;
@@ -455,6 +563,29 @@ module tb_exponentiator;
//
endtask
+ //
+ // read_memory_192
+ //
+ task read_memory_192;
+ //
+ output [191:0] r;
+ reg [191:0] r_shreg;
+ //
+ begin
+ //
+ for (w=0; w<NUM_WORDS_384/2; w=w+1) begin // read result word-by-word
+ tb_r_addr = w[3:0]; // set address
+ #10; // wait for 1 clock tick
+ r_shreg = {tb_r_data, r_shreg[191:32]}; // store data word
+ end
+ //
+ tb_r_addr = {4{1'bX}}; // wipe address
+ r = r_shreg; // return
+ //
+ end
+ //
+ endtask
+
endmodule
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