From 7f7efd18e6cd1534f197cd097a4b823ec5ec2ad7 Mon Sep 17 00:00:00 2001
From: Alban Gruin <alban.gruin@irit.fr>
Date: Thu, 6 Jul 2023 10:42:14 +0200
Subject: [PATCH] frontend: remove usage of opaque module `unread'
Signed-off-by: Alban Gruin <alban.gruin@irit.fr>
---
src/frontend/bht.sv | 2 --
src/frontend/btb.sv | 2 --
src/frontend/instr_queue.sv | 6 ------
3 files changed, 10 deletions(-)
diff --git a/src/frontend/bht.sv b/src/frontend/bht.sv
index 9eae69d3..e57c34bb 100644
--- a/src/frontend/bht.sv
+++ b/src/frontend/bht.sv
@@ -34,8 +34,6 @@ module bht #(
localparam ROW_ADDR_BITS = $clog2(ariane_pkg::INSTR_PER_FETCH);
// number of bits we should use for prediction
localparam PREDICTION_BITS = $clog2(NR_ROWS) + OFFSET + ROW_ADDR_BITS;
- // we are not interested in all bits of the address
- unread i_unread (.d_i(|vpc_i));
struct packed {
logic valid;
diff --git a/src/frontend/btb.sv b/src/frontend/btb.sv
index 86eeadc0..23f365fd 100644
--- a/src/frontend/btb.sv
+++ b/src/frontend/btb.sv
@@ -36,8 +36,6 @@ module btb #(
localparam PREDICTION_BITS = $clog2(NR_ROWS) + OFFSET + ROW_ADDR_BITS;
// prevent aliasing to degrade performance
localparam ANTIALIAS_BITS = 8;
- // we are not interested in all bits of the address
- unread i_unread (.d_i(|vpc_i));
// typedef for all branch target entries
// we may want to try to put a tag field that fills the rest of the PC in-order to mitigate aliasing effects
diff --git a/src/frontend/instr_queue.sv b/src/frontend/instr_queue.sv
index 15f3269d..84df044d 100644
--- a/src/frontend/instr_queue.sv
+++ b/src/frontend/instr_queue.sv
@@ -374,12 +374,6 @@ module instr_queue (
.pop_i ( pop_address )
);
- unread i_unread_address_fifo (.d_i(|{empty_address, address_queue_usage}));
- unread i_unread_branch_mask (.d_i(|branch_mask_extended));
- unread i_unread_lzc (.d_i(|{branch_empty}));
- unread i_unread_fifo_pos (.d_i(|fifo_pos_extended)); // we don't care about the lower signals
- unread i_unread_instr_fifo (.d_i(|instr_queue_usage));
-
always_ff @(posedge clk_i or negedge rst_ni) begin
if (!rst_ni) begin
idx_ds_q <= 'b1;
--
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