From 6045870288ffffff54f0bc1fa5c4db9ac4a505bf Mon Sep 17 00:00:00 2001
From: Ahmet Inan <inan@aicodix.de>
Date: Mon, 15 Jun 2020 07:33:21 +0200
Subject: [PATCH] added BCH(31, 16) T=3 for testing

---
 tests/short_bch_code_decoder_test.cc    | 13 +++++++++++++
 tests/short_bch_code_encoder_test.cc    |  4 ++++
 tests/short_bch_code_regression_test.cc |  4 ++++
 tests/soft_bch_regression_test.cc       |  9 +++++++++
 4 files changed, 30 insertions(+)

diff --git a/tests/short_bch_code_decoder_test.cc b/tests/short_bch_code_decoder_test.cc
index b0174cb..cdb22b6 100644
--- a/tests/short_bch_code_decoder_test.cc
+++ b/tests/short_bch_code_decoder_test.cc
@@ -53,6 +53,19 @@ int main()
 		int recovered = decode(damaged);
 		assert(recovered == target);
 	}
+	if (1) {
+		// BCH(31, 16) T=3
+		const int N = 31, K = 16, T = 3, POLY = 0b1000111110101111;
+		CODE::ShortBCHCodeDecoder<N, K, POLY, T> decode;
+		int target = 970576025;
+		int damaged = target;
+		typedef std::uniform_int_distribution<int> distribution;
+		auto epos = std::bind(distribution(0, N-1), generator);
+		for (int i = 0; i < T; ++i)
+			damaged ^= 1 << epos();
+		int recovered = decode(damaged);
+		assert(recovered == target);
+	}
 	std::cerr << "Short BCH code decoder test passed!" << std::endl;
 	return 0;
 }
diff --git a/tests/short_bch_code_encoder_test.cc b/tests/short_bch_code_encoder_test.cc
index 9b98d71..637754d 100644
--- a/tests/short_bch_code_encoder_test.cc
+++ b/tests/short_bch_code_encoder_test.cc
@@ -54,6 +54,10 @@ int main()
 		// NASA INTRO BCH(15, 5) T=3
 		bch_test<15, 5, 3, 0b10100110111>(0b11001, 0b110010001111010);
 	}
+	if (1) {
+		// BCH(31, 16) T=3
+		bch_test<31, 16, 3, 0b1000111110101111>(29619, 970576025);
+	}
 	std::cerr << "Short BCH code encoder test passed!" << std::endl;
 	return 0;
 }
diff --git a/tests/short_bch_code_regression_test.cc b/tests/short_bch_code_regression_test.cc
index 84c152d..2df1b75 100644
--- a/tests/short_bch_code_regression_test.cc
+++ b/tests/short_bch_code_regression_test.cc
@@ -49,6 +49,10 @@ int main()
 		// NASA INTRO BCH(15, 5) T=3
 		bch_test<15, 5, 3, 0b10100110111>(1000000);
 	}
+	if (1) {
+		// BCH(31, 16) T=3
+		bch_test<31, 16, 3, 0b1000111110101111>(1000000);
+	}
 	std::cerr << "Short BCH code regression test passed!" << std::endl;
 	return 0;
 }
diff --git a/tests/soft_bch_regression_test.cc b/tests/soft_bch_regression_test.cc
index f762ce7..cc03d71 100644
--- a/tests/soft_bch_regression_test.cc
+++ b/tests/soft_bch_regression_test.cc
@@ -51,6 +51,15 @@ int popcnt(TYPE x)
 	const int RADIUS_T = 3;
 	const int GEN_POLY = 0b10100110111;
 #endif
+#if 0
+	// BCH(31, 16) T=3
+	const int LOOPS = 50000;
+	const float QEF_SNR = 6.5;
+	const int CODE_LEN = 31;
+	const int DATA_LEN = 16;
+	const int RADIUS_T = 3;
+	const int GEN_POLY = 0b1000111110101111;
+#endif
 
 int main()
 {