soft_register: Remove compiler warning, add unit test

1 files changed, 33 insertions, 0 deletions

diff --git a/host/tests/soft_reg_test.cpp b/host/tests/soft_reg_test.cpp
new file mode 100644
index 000000000..8e53c61ca
--- /dev/null
+++ b/host/tests/soft_reg_test.cpp
@@ -0,0 +1,33 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include <uhd/utils/soft_register.hpp>
+#include <boost/test/unit_test.hpp>
+
+using namespace uhd;
+
+BOOST_AUTO_TEST_CASE(test_soft_reg_field) {
+    UHD_DEFINE_SOFT_REG_FIELD(test_reg1, /* width */ 1, /* shift */ 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::width(test_reg1), 1);
+    BOOST_CHECK_EQUAL(soft_reg_field::shift(test_reg1), 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::mask<uint32_t>(test_reg1),  1<<0);
+
+    UHD_DEFINE_SOFT_REG_FIELD(test_reg2, /* width */ 5, /* shift */ 4);
+    BOOST_CHECK_EQUAL(soft_reg_field::width(test_reg2), 5);
+    BOOST_CHECK_EQUAL(soft_reg_field::shift(test_reg2), 4);
+    BOOST_CHECK_EQUAL(soft_reg_field::mask<uint32_t>(test_reg2),  0x1F<<4);
+
+    UHD_DEFINE_SOFT_REG_FIELD(test_reg3, /* width */ 9, /* shift */ 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::width(test_reg3), 9);
+    BOOST_CHECK_EQUAL(soft_reg_field::shift(test_reg3), 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::mask<uint8_t>(test_reg3),  0xFF);
+
+    // This one is platform dependent:
+    UHD_DEFINE_SOFT_REG_FIELD(test_reg4, /* width */ 33, /* shift */ 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::width(test_reg4), 33);
+    BOOST_CHECK_EQUAL(soft_reg_field::shift(test_reg4), 0);
+    BOOST_CHECK_EQUAL(soft_reg_field::mask<size_t>(test_reg4), ~size_t(0) & 0x1FFFFFFFF);
+}