From e7ef790145abdafa56f7a460b3c9af87dfafb95e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20V=C3=A1zquez?=
 <83733507+danivz@users.noreply.github.com>
Date: Fri, 19 Jul 2024 18:21:37 +0200
Subject: [PATCH] Remove pow function to avoid errors in Synopsys DC (#559)

---
 hw/ip/pdm2pcm/rtl/fir.sv      | 4 +++-
 hw/ip/pdm2pcm/rtl/halfband.sv | 6 +++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/hw/ip/pdm2pcm/rtl/fir.sv b/hw/ip/pdm2pcm/rtl/fir.sv
index 6d22d673e..ce17a7a66 100644
--- a/hw/ip/pdm2pcm/rtl/fir.sv
+++ b/hw/ip/pdm2pcm/rtl/fir.sv
@@ -48,7 +48,9 @@ module fir #(
   genvar k;
   generate
     for (k = 0; k < TOTCOEFS; k = k + 1) begin : coeffs_mapping
-      assign coeffs[k] = freecoeffs[int'($floor($sqrt($pow((TOTCOEFS-1)/2.0-k, 2))))];
+      // Remove $pow function to avoid errors in Synopsys DC
+      // assign coeffs[k] = freecoeffs[int'($floor($sqrt($pow((TOTCOEFS-1)/2.0-k, 2))))];
+      assign coeffs[k] = freecoeffs[int'($floor($sqrt(((TOTCOEFS-1)/2.0-k)*((TOTCOEFS-1)/2.0-k))))];
     end
   endgenerate
 
diff --git a/hw/ip/pdm2pcm/rtl/halfband.sv b/hw/ip/pdm2pcm/rtl/halfband.sv
index 9d9355c8d..a0710c586 100644
--- a/hw/ip/pdm2pcm/rtl/halfband.sv
+++ b/hw/ip/pdm2pcm/rtl/halfband.sv
@@ -63,7 +63,11 @@ module halfband #(
   genvar k;
   generate
     for (k = 0; k < TOTCOEFS; k = k + 1) begin : coeffs_mapping
-      assign coeffs[k] = lessfreecoeffs[int'($floor($sqrt($pow((TOTCOEFS-1)/2.0-k, 2))))];
+      // Remove $pow function to avoid errors in Synopsys DC
+      // assign coeffs[k] = lessfreecoeffs[int'($floor($sqrt($pow((TOTCOEFS-1)/2.0-k, 2))))];
+      assign coeffs[k] = lessfreecoeffs[int'($floor(
+          $sqrt(((TOTCOEFS-1)/2.0-k)*((TOTCOEFS-1)/2.0-k))
+      ))];
     end
   endgenerate