aboutsummaryrefslogtreecommitdiff
path: root/rtl
diff options
context:
space:
mode:
authorPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2020-02-03 22:43:48 +0300
committerPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2020-02-03 22:43:48 +0300
commitf2598e0ec96852ced07cff5a6baa91b0ff1dc00f (patch)
tree1cc1aed57c637851d218742eb84897ddf4d58a0d /rtl
parent58ad4d95d6de1f62bb3664e3782d8f6ae9c691f0 (diff)
Improved debugging options:
* flush console after each ladder iteration for smoother progress output * ability to truncate internal powering ladder loop at desired step (this will only work when using simulation mode, obviously)
Diffstat (limited to 'rtl')
-rw-r--r--rtl/modexpng_io_manager.v21
-rw-r--r--rtl/modexpng_io_manager_debug.vh2
2 files changed, 21 insertions, 2 deletions
diff --git a/rtl/modexpng_io_manager.v b/rtl/modexpng_io_manager.v
index fdbc4af..2b71779 100644
--- a/rtl/modexpng_io_manager.v
+++ b/rtl/modexpng_io_manager.v
@@ -345,6 +345,14 @@ module modexpng_io_manager
//
// Ladder Init/Step Logic
//
+
+`ifdef MODEXPNG_ENABLE_DEBUG
+//`define DEFINE_MODEXPNG_TRUNCATE_LADDER XXX /*specify step index to abort ladder*/
+`ifdef DEFINE_MODEXPNG_TRUNCATE_LADDER
+localparam [BIT_INDEX_W-1:0] MODEXPNG_TRUNCATE_LADDER = `DEFINE_MODEXPNG_TRUNCATE_LADDER;
+`endif
+`endif
+
reg ladder_d_r;
reg ladder_p_r;
reg ladder_q_r;
@@ -360,8 +368,8 @@ module modexpng_io_manager
wire [ OP_ADDR_W -1:0] ladder_index_msb = ladder_index[BIT_INDEX_W-1-: OP_ADDR_W];
wire [ WORD_MUX_W -1:0] ladder_index_lsb = ladder_index[ WORD_MUX_W-1-:WORD_MUX_W];
wire ladder_index_is_zero = ladder_index == BIT_INDEX_ZERO;
-
- always @(posedge clk)
+
+ always @(posedge clk) begin
//
if (io_fsm_state_next == IO_FSM_STATE_LATENCY_PRE1) begin
//
@@ -378,6 +386,15 @@ module modexpng_io_manager
end
//
end
+ //
+`ifdef MODEXPNG_ENABLE_DEBUG
+`ifdef DEFINE_MODEXPNG_TRUNCATE_LADDER
+ if ((io_fsm_state_next == IO_FSM_STATE_STOP) && opcode_is_ladder_step && (ladder_index == MODEXPNG_TRUNCATE_LADDER))
+ ladder_done_r <= 1'b1;
+`endif
+`endif
+ //
+ end
//
diff --git a/rtl/modexpng_io_manager_debug.vh b/rtl/modexpng_io_manager_debug.vh
index e94ec67..3d50cc6 100644
--- a/rtl/modexpng_io_manager_debug.vh
+++ b/rtl/modexpng_io_manager_debug.vh
@@ -36,6 +36,8 @@ always @(posedge clk)
if (opcode_is_ladder_init) begin
$display("[step] | D | P | Q");
$display("-------+---+---+---");
+ $fflush;
end else if (opcode_is_ladder_step)
$display("[%4d] | %d | %d | %d", ladder_index, ladder_d_r, ladder_p_r, ladder_q_r);
+ $fflush;
end