From 628342b0c35bb8bc5da89280be76a96e27c9b89f Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Wed, 20 Apr 2022 11:25:06 +0200
Subject: [PATCH] Use c_lsb_round_even = FALSE, because golden reference data
is for round half away from zero.
---
libraries/base/common/tb/vhdl/tb_requantize.vhd | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/libraries/base/common/tb/vhdl/tb_requantize.vhd b/libraries/base/common/tb/vhdl/tb_requantize.vhd
index 9f4ca004fa..f7317d92b3 100644
--- a/libraries/base/common/tb/vhdl/tb_requantize.vhd
+++ b/libraries/base/common/tb/vhdl/tb_requantize.vhd
@@ -34,6 +34,7 @@ USE work.common_pkg.ALL;
-- . c_out_dat_w = 3
-- . c_lsb_w = 2
-- . c_lsb_round_clip = TRUE
+-- . c_lsb_round_even = FALSE
-- . c_msb_clip_symmetric = TRUE
-- . Observe reg_dat with respect to the out_s_*_*.dat and out_u_*_*.dat
-- . Try also c_lsb_round_clip=FALSE
@@ -55,6 +56,7 @@ ARCHITECTURE tb OF tb_requantize IS
CONSTANT c_out_dat_w : NATURAL := 3;
CONSTANT c_lsb_w : NATURAL := 2;
CONSTANT c_lsb_round_clip : BOOLEAN := TRUE; --FALSE;
+ CONSTANT c_lsb_round_even : BOOLEAN := FALSE; -- golden reference data is for round half away from zero
CONSTANT c_msb_clip_symmetric : BOOLEAN := TRUE; --FALSE;
-- Stimuli
@@ -158,6 +160,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => TRUE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => TRUE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -178,6 +181,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => TRUE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => FALSE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -198,6 +202,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => FALSE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => TRUE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -218,6 +223,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => FALSE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => FALSE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -239,6 +245,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => TRUE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => TRUE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -259,6 +266,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => TRUE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => FALSE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -279,6 +287,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => FALSE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => TRUE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
@@ -299,6 +308,7 @@ BEGIN
g_lsb_w => c_lsb_w,
g_lsb_round => FALSE,
g_lsb_round_clip => c_lsb_round_clip,
+ g_lsb_round_even => c_lsb_round_even,
g_msb_clip => FALSE,
g_msb_clip_symmetric => c_msb_clip_symmetric,
g_pipeline_remove_lsb => g_pipeline_remove_lsb,
--
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