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-rw-r--r--src/tb/tb_sha512.v67
1 files changed, 66 insertions, 1 deletions
diff --git a/src/tb/tb_sha512.v b/src/tb/tb_sha512.v
index c993cfc..a3409f5 100644
--- a/src/tb/tb_sha512.v
+++ b/src/tb/tb_sha512.v
@@ -662,6 +662,68 @@ module tb_sha512();
//----------------------------------------------------------------
+ // state_restore_test()
+ //
+ // Perform test of state restore followed by block processing.
+ //----------------------------------------------------------------
+ task state_restore_test(input [7 : 0] tc_number,
+ input [1 : 0] mode,
+ input [511 : 0] state,
+ input [1023 : 0] block,
+ input [511 : 0] expected
+ );
+ reg [511 : 0] mask;
+ reg [511 : 0] masked_data;
+ begin
+ $display("*** TC%01d - State restore test started.", tc_ctr);
+
+ // Write state.
+ write_word(ADDR_DIGEST0, state[511 : 480]);
+ write_word(ADDR_DIGEST0, state[479 : 448]);
+ write_word(ADDR_DIGEST0, state[447 : 416]);
+ write_word(ADDR_DIGEST0, state[415 : 384]);
+ write_word(ADDR_DIGEST0, state[383 : 352]);
+ write_word(ADDR_DIGEST0, state[351 : 320]);
+ write_word(ADDR_DIGEST0, state[319 : 288]);
+ write_word(ADDR_DIGEST0, state[287 : 256]);
+ write_word(ADDR_DIGEST0, state[255 : 224]);
+ write_word(ADDR_DIGEST0, state[223 : 192]);
+ write_word(ADDR_DIGEST0, state[191 : 160]);
+ write_word(ADDR_DIGEST0, state[159 : 128]);
+ write_word(ADDR_DIGEST0, state[127 : 096]);
+ write_word(ADDR_DIGEST0, state[095 : 064]);
+ write_word(ADDR_DIGEST0, state[063 : 032]);
+ write_word(ADDR_DIGEST0, state[031 : 000]);
+
+ // Final block
+ write_block(block);
+ write_word(ADDR_CTRL, {28'h0000000, mode, CTRL_NEXT_VALUE});
+ #(CLK_PERIOD);
+ wait_ready();
+ read_digest();
+
+ mask = get_mask(mode);
+ masked_data = digest_data & mask;
+
+ if (masked_data == expected)
+ begin
+ $display("TC%01d final block: OK.", tc_ctr);
+ end
+ else
+ begin
+ $display("TC%01d: ERROR in final digest", tc_ctr);
+ $display("TC%01d: Expected: 0x%0128x", tc_ctr, expected);
+ $display("TC%01d: Got: 0x%0128x", tc_ctr, masked_data);
+ error_ctr = error_ctr + 1;
+ end
+
+ $display("*** TC%01d - Double block test done.", tc_ctr);
+ tc_ctr = tc_ctr + 1;
+ end
+ endtask // state_restore_test
+
+
+ //----------------------------------------------------------------
// work_factor_test()
//
// Perform test of the work factor function.
@@ -782,7 +844,10 @@ module tb_sha512();
double_block_test(8'h08, MODE_SHA_384, double_block_one, double_block_two, tc11_expected, tc12_expected);
// Work factor test.
- work_factor_test();
+// work_factor_test();
+
+ // State restore test.
+ state_restore_test(8'h09, MODE_SHA_512, tc5_expected, double_block_two, tc6_expected);
dump_dut_state();