[libc-commits] [libc] 3604c23 - [libc][math] implement `signbit` and math macro unit tests (#97791)
via libc-commits
libc-commits at lists.llvm.org
Sat Jul 13 20:01:39 PDT 2024
Author: Akiel
Date: 2024-07-13T23:01:36-04:00
New Revision: 3604c23dfc8edb00aae72456ef3ff765eb795db5
URL: https://github.com/llvm/llvm-project/commit/3604c23dfc8edb00aae72456ef3ff765eb795db5
DIFF: https://github.com/llvm/llvm-project/commit/3604c23dfc8edb00aae72456ef3ff765eb795db5.diff
LOG: [libc][math] implement `signbit` and math macro unit tests (#97791)
This PR resolves #96322 and implements the `signbit` macro under a new
header `generic-math-macros.h`. This also removed the `TODO` in
`math-macros.h` and moves `isfinite`, `isinf`, and `isnan` to the same
generic maths header. Finally, a test file
`generic-math-macros_test.cpp` that adds coverage to the above 4 macros.
Fixes #96322.
Added:
libc/test/include/IsFiniteTest.h
libc/test/include/IsInfTest.h
libc/test/include/IsNanTest.h
libc/test/include/SignbitTest.h
libc/test/include/isfinite_test.c
libc/test/include/isfinite_test.cpp
libc/test/include/isfinitef_test.cpp
libc/test/include/isfinitel_test.cpp
libc/test/include/isinf_test.c
libc/test/include/isinf_test.cpp
libc/test/include/isinff_test.cpp
libc/test/include/isinfl_test.cpp
libc/test/include/isnan_test.c
libc/test/include/isnan_test.cpp
libc/test/include/isnanf_test.cpp
libc/test/include/isnanl_test.cpp
libc/test/include/signbit_test.c
libc/test/include/signbit_test.cpp
libc/test/include/signbitf_test.cpp
libc/test/include/signbitl_test.cpp
Modified:
libc/include/llvm-libc-macros/math-function-macros.h
libc/test/include/CMakeLists.txt
Removed:
################################################################################
diff --git a/libc/include/llvm-libc-macros/math-function-macros.h b/libc/include/llvm-libc-macros/math-function-macros.h
index 551719af2b4dd..8d18997bed8d2 100644
--- a/libc/include/llvm-libc-macros/math-function-macros.h
+++ b/libc/include/llvm-libc-macros/math-function-macros.h
@@ -12,5 +12,6 @@
#define isfinite(x) __builtin_isfinite(x)
#define isinf(x) __builtin_isinf(x)
#define isnan(x) __builtin_isnan(x)
+#define signbit(x) __builtin_signbit(x)
#endif // LLVM_LIBC_MACROS_MATH_FUNCTION_MACROS_H
diff --git a/libc/test/include/CMakeLists.txt b/libc/test/include/CMakeLists.txt
index 4be42289f8fe3..32513f234b9b9 100644
--- a/libc/test/include/CMakeLists.txt
+++ b/libc/test/include/CMakeLists.txt
@@ -80,3 +80,183 @@ add_libc_test(
DEPENDS
libc.include.llvm-libc-macros.stdckdint_macros
)
+
+add_libc_test(
+ signbit_test
+ SUITE
+ libc_include_tests
+ SRCS
+ signbit_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ signbitf_test
+ SUITE
+ libc_include_tests
+ SRCS
+ signbitf_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ signbitl_test
+ SUITE
+ libc_include_tests
+ SRCS
+ signbitl_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isnan_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isnan_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isnanf_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isnanf_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isnanl_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isnanl_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isinf_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isinf_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isinff_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isinff_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isinfl_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isinfl_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isfinite_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isfinite_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isfinitef_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isfinitef_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isfinitel_test
+ SUITE
+ libc_include_tests
+ SRCS
+ isfinitel_test.cpp
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ signbit_c_test
+ C_TEST
+ UNIT_TEST_ONLY
+ SUITE
+ libc_include_tests
+ SRCS
+ signbit_test.c
+ COMPILE_OPTIONS
+ -Wall
+ -Werror
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isnan_c_test
+ C_TEST
+ UNIT_TEST_ONLY
+ SUITE
+ libc_include_tests
+ SRCS
+ isnan_test.c
+ COMPILE_OPTIONS
+ -Wall
+ -Werror
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isinf_c_test
+ C_TEST
+ UNIT_TEST_ONLY
+ SUITE
+ libc_include_tests
+ SRCS
+ isinf_test.c
+ COMPILE_OPTIONS
+ -Wall
+ -Werror
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
+
+add_libc_test(
+ isfinite_c_test
+ C_TEST
+ UNIT_TEST_ONLY
+ SUITE
+ libc_include_tests
+ SRCS
+ isfinite_test.c
+ COMPILE_OPTIONS
+ -Wall
+ -Werror
+ DEPENDS
+ libc.include.llvm-libc-macros.math_function_macros
+)
diff --git a/libc/test/include/IsFiniteTest.h b/libc/test/include/IsFiniteTest.h
new file mode 100644
index 0000000000000..3d2fc0daae4ca
--- /dev/null
+++ b/libc/test/include/IsFiniteTest.h
@@ -0,0 +1,39 @@
+//===-- Utility class to test the isfinite macro [f|l] ----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_TEST_INCLUDE_MATH_ISFINITE_H
+#define LLVM_LIBC_TEST_INCLUDE_MATH_ISFINITE_H
+
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+template <typename T>
+class IsFiniteTest : public LIBC_NAMESPACE::testing::Test {
+ DECLARE_SPECIAL_CONSTANTS(T)
+
+public:
+ typedef int (*IsFiniteFunc)(T);
+
+ void testSpecialNumbers(IsFiniteFunc func) {
+ EXPECT_EQ(func(inf), 0);
+ EXPECT_EQ(func(neg_inf), 0);
+ EXPECT_EQ(func(zero), 1);
+ EXPECT_EQ(func(neg_zero), 1);
+ }
+};
+
+#define LIST_ISFINITE_TESTS(T, func) \
+ using LlvmLibcIsFiniteTest = IsFiniteTest<T>; \
+ TEST_F(LlvmLibcIsFiniteTest, SpecialNumbers) { \
+ auto isfinite_func = [](T x) { return func(x); }; \
+ testSpecialNumbers(isfinite_func); \
+ }
+
+#endif // LLVM_LIBC_TEST_INCLUDE_MATH_ISFINITE_H
diff --git a/libc/test/include/IsInfTest.h b/libc/test/include/IsInfTest.h
new file mode 100644
index 0000000000000..7993a49c15fef
--- /dev/null
+++ b/libc/test/include/IsInfTest.h
@@ -0,0 +1,39 @@
+//===-- Utility class to test the isinf macro [f|l] -------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_TEST_INCLUDE_MATH_ISINF_H
+#define LLVM_LIBC_TEST_INCLUDE_MATH_ISINF_H
+
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+template <typename T> class IsInfTest : public LIBC_NAMESPACE::testing::Test {
+
+ DECLARE_SPECIAL_CONSTANTS(T)
+
+public:
+ typedef int (*IsInfFunc)(T);
+
+ void testSpecialNumbers(IsInfFunc func) {
+ EXPECT_EQ(func(zero), 0);
+ EXPECT_EQ(func(neg_zero), 0);
+ EXPECT_EQ(func(inf), 1);
+ EXPECT_EQ(func(neg_inf), 1);
+ }
+};
+
+#define LIST_ISINF_TESTS(T, func) \
+ using LlvmLibcIsInfTest = IsInfTest<T>; \
+ TEST_F(LlvmLibcIsInfTest, SpecialNumbers) { \
+ auto isinf_func = [](T x) { return func(x); }; \
+ testSpecialNumbers(isinf_func); \
+ }
+
+#endif // LLVM_LIBC_TEST_INCLUDE_MATH_ISINF_H
diff --git a/libc/test/include/IsNanTest.h b/libc/test/include/IsNanTest.h
new file mode 100644
index 0000000000000..362699a18dfc1
--- /dev/null
+++ b/libc/test/include/IsNanTest.h
@@ -0,0 +1,39 @@
+//===-- Utility class to test the isnan macro [f|l] -------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license nanormation.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_TEST_INCLUDE_MATH_ISNAN_H
+#define LLVM_LIBC_TEST_INCLUDE_MATH_ISNAN_H
+
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+template <typename T> class IsNanTest : public LIBC_NAMESPACE::testing::Test {
+
+ DECLARE_SPECIAL_CONSTANTS(T)
+
+public:
+ typedef int (*IsNanFunc)(T);
+
+ void testSpecialNumbers(IsNanFunc func) {
+ EXPECT_EQ(func(zero), 0);
+ EXPECT_EQ(func(neg_zero), 0);
+ EXPECT_EQ(func(aNaN), 1);
+ EXPECT_EQ(func(sNaN), 1);
+ }
+};
+
+#define LIST_ISNAN_TESTS(T, func) \
+ using LlvmLibcIsNanTest = IsNanTest<T>; \
+ TEST_F(LlvmLibcIsNanTest, SpecialNumbers) { \
+ auto isnan_func = [](T x) { return func(x); }; \
+ testSpecialNumbers(isnan_func); \
+ }
+
+#endif // LLVM_LIBC_TEST_INCLUDE_MATH_ISNAN_H
diff --git a/libc/test/include/SignbitTest.h b/libc/test/include/SignbitTest.h
new file mode 100644
index 0000000000000..85d499823088c
--- /dev/null
+++ b/libc/test/include/SignbitTest.h
@@ -0,0 +1,37 @@
+//===-- Utility class to test the signbit macro [f|l] -----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_TEST_INCLUDE_MATH_SIGNBIT_H
+#define LLVM_LIBC_TEST_INCLUDE_MATH_SIGNBIT_H
+
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+template <typename T> class SignbitTest : public LIBC_NAMESPACE::testing::Test {
+
+ DECLARE_SPECIAL_CONSTANTS(T)
+
+public:
+ typedef int (*SignbitFunc)(T);
+
+ void testSpecialNumbers(SignbitFunc func) {
+ EXPECT_EQ(func(1), 0);
+ EXPECT_EQ(func(-1), 1);
+ }
+};
+
+#define LIST_SIGNBIT_TESTS(T, func) \
+ using LlvmLibcSignbitTest = SignbitTest<T>; \
+ TEST_F(LlvmLibcSignbitTest, SpecialNumbers) { \
+ auto signbit_func = [](T x) { return func(x); }; \
+ testSpecialNumbers(signbit_func); \
+ }
+
+#endif // LLVM_LIBC_TEST_INCLUDE_MATH_SIGNBIT_H
diff --git a/libc/test/include/isfinite_test.c b/libc/test/include/isfinite_test.c
new file mode 100644
index 0000000000000..5fbf4b4ca8ef2
--- /dev/null
+++ b/libc/test/include/isfinite_test.c
@@ -0,0 +1,22 @@
+//===-- Unittests for isfinite macro --------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+#include <assert.h>
+
+// check if macro is defined
+#ifndef isfinite
+#error "isfinite macro is not defined"
+#else
+int main(void) {
+ assert(isfinite(1.0f));
+ assert(isfinite(1.0));
+ assert(isfinite(1.0L));
+ return 0;
+}
+#endif
diff --git a/libc/test/include/isfinite_test.cpp b/libc/test/include/isfinite_test.cpp
new file mode 100644
index 0000000000000..79ac44206e634
--- /dev/null
+++ b/libc/test/include/isfinite_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isfinite[d] macro ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsFiniteTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISFINITE_TESTS(double, isfinite)
diff --git a/libc/test/include/isfinitef_test.cpp b/libc/test/include/isfinitef_test.cpp
new file mode 100644
index 0000000000000..b1f66cd040e16
--- /dev/null
+++ b/libc/test/include/isfinitef_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isfinite[f] macro ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsFiniteTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISFINITE_TESTS(float, isfinite)
diff --git a/libc/test/include/isfinitel_test.cpp b/libc/test/include/isfinitel_test.cpp
new file mode 100644
index 0000000000000..9087cd69ba014
--- /dev/null
+++ b/libc/test/include/isfinitel_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isfinite[l] macro ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsFiniteTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISFINITE_TESTS(long double, isfinite)
diff --git a/libc/test/include/isinf_test.c b/libc/test/include/isinf_test.c
new file mode 100644
index 0000000000000..cc099cb612585
--- /dev/null
+++ b/libc/test/include/isinf_test.c
@@ -0,0 +1,22 @@
+//===-- Unittests for isinf macro -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+#include <assert.h>
+
+// check if macro is defined
+#ifndef isinf
+#error "isinf macro is not defined"
+#else
+int main(void) {
+ assert(!isinf(1.0f));
+ assert(!isinf(1.0));
+ assert(!isinf(1.0L));
+ return 0;
+}
+#endif
diff --git a/libc/test/include/isinf_test.cpp b/libc/test/include/isinf_test.cpp
new file mode 100644
index 0000000000000..ecf19d078489a
--- /dev/null
+++ b/libc/test/include/isinf_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isinf[d] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsInfTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISINF_TESTS(double, isinf)
diff --git a/libc/test/include/isinff_test.cpp b/libc/test/include/isinff_test.cpp
new file mode 100644
index 0000000000000..a2170c766bf6e
--- /dev/null
+++ b/libc/test/include/isinff_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isinf[f] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsInfTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISINF_TESTS(float, isinf)
diff --git a/libc/test/include/isinfl_test.cpp b/libc/test/include/isinfl_test.cpp
new file mode 100644
index 0000000000000..e4fb91d9608fb
--- /dev/null
+++ b/libc/test/include/isinfl_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isinf[l] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsInfTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISINF_TESTS(long double, isinf)
diff --git a/libc/test/include/isnan_test.c b/libc/test/include/isnan_test.c
new file mode 100644
index 0000000000000..ec0f8032356bd
--- /dev/null
+++ b/libc/test/include/isnan_test.c
@@ -0,0 +1,22 @@
+//===-- Unittests for isnan macro -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+#include <assert.h>
+
+// check if macro is defined
+#ifndef isnan
+#error "isnan macro is not defined"
+#else
+int main(void) {
+ assert(!isnan(1.0f));
+ assert(!isnan(1.0));
+ assert(!isnan(1.0L));
+ return 0;
+}
+#endif
diff --git a/libc/test/include/isnan_test.cpp b/libc/test/include/isnan_test.cpp
new file mode 100644
index 0000000000000..07dfab740724b
--- /dev/null
+++ b/libc/test/include/isnan_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isnan[l] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsNanTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISNAN_TESTS(double, isnan)
diff --git a/libc/test/include/isnanf_test.cpp b/libc/test/include/isnanf_test.cpp
new file mode 100644
index 0000000000000..e78a8e45e0233
--- /dev/null
+++ b/libc/test/include/isnanf_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isnan[f] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsNanTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISNAN_TESTS(float, isnan)
diff --git a/libc/test/include/isnanl_test.cpp b/libc/test/include/isnanl_test.cpp
new file mode 100644
index 0000000000000..84759a3ab28bc
--- /dev/null
+++ b/libc/test/include/isnanl_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for isnan[l] macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "IsNanTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_ISNAN_TESTS(long double, isnan)
diff --git a/libc/test/include/signbit_test.c b/libc/test/include/signbit_test.c
new file mode 100644
index 0000000000000..7e2460f3203a5
--- /dev/null
+++ b/libc/test/include/signbit_test.c
@@ -0,0 +1,25 @@
+//===-- Unittests for signbit macro ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+#include <assert.h>
+
+// check if macro is defined
+#ifndef signbit
+#error "signbit macro is not defined"
+#else
+int main(void) {
+ assert(!signbit(1.0f));
+ assert(!signbit(1.0));
+ assert(!signbit(1.0L));
+ assert(signbit(-1.0f));
+ assert(signbit(-1.0));
+ assert(signbit(-1.0L));
+ return 0;
+}
+#endif
diff --git a/libc/test/include/signbit_test.cpp b/libc/test/include/signbit_test.cpp
new file mode 100644
index 0000000000000..d97ab0b1e0a89
--- /dev/null
+++ b/libc/test/include/signbit_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittest for signbit [d] macro ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "SignbitTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_SIGNBIT_TESTS(double, signbit)
diff --git a/libc/test/include/signbitf_test.cpp b/libc/test/include/signbitf_test.cpp
new file mode 100644
index 0000000000000..3a4bf933ec81e
--- /dev/null
+++ b/libc/test/include/signbitf_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittests for signbit [f] macro -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "SignbitTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_SIGNBIT_TESTS(float, signbit)
diff --git a/libc/test/include/signbitl_test.cpp b/libc/test/include/signbitl_test.cpp
new file mode 100644
index 0000000000000..5859840b4562d
--- /dev/null
+++ b/libc/test/include/signbitl_test.cpp
@@ -0,0 +1,12 @@
+//===-- Unittests for signbit[l] macro ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDSList-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "SignbitTest.h"
+#include "include/llvm-libc-macros/math-function-macros.h"
+
+LIST_SIGNBIT_TESTS(long double, signbit)
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