From 4aa205870c0c396b48f515f80f5b73b256538292 Mon Sep 17 00:00:00 2001
From: Alban Gruin <alban.gruin@irit.fr>
Date: Thu, 17 Feb 2022 13:10:23 +0100
Subject: [PATCH] fixup! sras: size improvements
---
src/frontend/sras.sv | 34 +++++++++++++++++++---------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/src/frontend/sras.sv b/src/frontend/sras.sv
index 1bd7ed8e..accec65b 100644
--- a/src/frontend/sras.sv
+++ b/src/frontend/sras.sv
@@ -60,16 +60,17 @@ module sras #(
ovf_counter_d = '0;
end else if (!bad_spec_i) begin
if (push_i && !pop_i) begin
- if (overflow) begin
+ if (overflow || prev_plus_one == '0 || pp_plus_one == '0) begin
ovf_counter_d[ptr_spec_d] = ovf_counter_q[ptr_spec_q] + 1'b1;
- end else if (prev_plus_one == '0 || pp_plus_one == '0) begin
- ovf_counter_d[ptr_spec_d] = ovf_counter_q[ptr_spec_q] + 1'b1;
- if (begin_spec_i) begin
- ovf_counter_d[ptr_spec_q] = ovf_counter_q[ptr_spec_q] + 1'b1;
- end
end
- end else if (!push_i && pop_i && ovf_counter_q[ptr_spec_q] != '0) begin
- ovf_counter_d[ptr_spec_d] = ovf_counter_q[ptr_spec_q] - 1'b1;
+
+ if ((prev_plus_one == '0 || pp_plus_one == '0) && begin_spec_i) begin
+ ovf_counter_d[ptr_spec_q] = ovf_counter_q[ptr_spec_q] + 1'b1;
+ end
+ end else if (!push_i && pop_i) begin
+ if (ovf_counter_q[ptr_spec_q] != '0) begin
+ ovf_counter_d[ptr_spec_d] = ovf_counter_q[ptr_spec_q] - 1'b1;
+ end
end else if (!bad_spec_i && begin_spec_i) begin
ovf_counter_d[ptr_spec_d] = ovf_counter_q[ptr_spec_q];
end
@@ -82,14 +83,17 @@ module sras #(
if (flush_i) begin
tos_d = '0;
end else if (!bad_spec_i) begin
- if (push_i && !pop_i && !overflow && prev_plus_one != '0 && pp_plus_one != '0) begin
- tos_d[ptr_spec_d] = prev_plus_one;
-
- if (begin_spec_i) begin
- tos_d[ptr_spec_q] = pp_plus_one;
+ if (push_i && !pop_i) begin
+ if (!overflow && prev_plus_one != '0 && pp_plus_one != '0) begin
+ tos_d[ptr_spec_d] = prev_plus_one;
+ if (begin_spec_i) begin
+ tos_d[ptr_spec_q] = pp_plus_one;
+ end
+ end
+ end else if (!push_i && pop_i) begin
+ if (ovf_counter_q[ptr_spec_q] == '0) begin
+ tos_d[ptr_spec_d] = prev_minus_one;
end
- end else if (!push_i && pop_i && ovf_counter_q[ptr_spec_q] == '0) begin
- tos_d[ptr_spec_d] = prev_minus_one;
end else if (!bad_spec_i && begin_spec_i) begin
tos_d[ptr_spec_d] = tos_q[ptr_spec_q];
end
--
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