diff --git a/libc/src/complex/crealf16.h b/libc/src/complex/crealf16.h
@@ -0,0 +1,27 @@
+//===-- Implementation header for crealf16 ----------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/__support/macros/properties/complex_types.h"
+#include "src/__support/macros/properties/types.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+#ifndef LLVM_LIBC_SRC_COMPLEX_CREALF16_H
+#define LLVM_LIBC_SRC_COMPLEX_CREALF16_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float16 crealf16(cfloat16 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CREALF16_H
+
+#endif // LIBC_TYPES_HAS_CFLOAT16
diff --git a/libc/src/complex/creall.h b/libc/src/complex/creall.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for creall ------------------------*- 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_SRC_COMPLEX_CREALL_H
+#define LLVM_LIBC_SRC_COMPLEX_CREALL_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+long double creall(_Complex long double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CREALL_H
diff --git a/libc/src/complex/generic/CMakeLists.txt b/libc/src/complex/generic/CMakeLists.txt
@@ -0,0 +1,137 @@
+add_entrypoint_object(
+  creal
+  SRCS
+    creal.cpp
+  HDRS
+    ../creal.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  crealf
+  SRCS
+    crealf.cpp
+  HDRS
+    ../crealf.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  creall
+  SRCS
+    creall.cpp
+  HDRS
+    ../creall.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  crealf16
+  SRCS
+    crealf16.cpp
+  HDRS
+    ../crealf16.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.properties.complex_types
+)
+
+add_entrypoint_object(
+  crealf128
+  SRCS
+    crealf128.cpp
+  HDRS
+    ../crealf128.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.properties.complex_types
+)
+
+add_entrypoint_object(
+  cimag
+  SRCS
+    cimag.cpp
+  HDRS
+    ../cimag.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  cimagf
+  SRCS
+    cimagf.cpp
+  HDRS
+    ../cimagf.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  cimagl
+  SRCS
+    cimagl.cpp
+  HDRS
+    ../cimagl.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+)
+
+add_entrypoint_object(
+  cimagf16
+  SRCS
+    cimagf16.cpp
+  HDRS
+    ../cimagf16.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.properties.complex_types
+)
+
+add_entrypoint_object(
+  cimagf128
+  SRCS
+    cimagf128.cpp
+  HDRS
+    ../cimagf128.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.CPP.bit
+    libc.src.__support.complex_type
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.properties.complex_types
+)
diff --git a/libc/src/complex/generic/cimag.cpp b/libc/src/complex/generic/cimag.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of cimag function ----------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/cimag.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(double, cimag, (_Complex double x)) {
+  Complex<double> x_c = cpp::bit_cast<Complex<double>>(x);
+  return x_c.imag;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/complex/generic/cimagf.cpp b/libc/src/complex/generic/cimagf.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of cimagf function ---------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/cimagf.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float, cimagf, (_Complex float x)) {
+  Complex<float> x_c = cpp::bit_cast<Complex<float>>(x);
+  return x_c.imag;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/complex/generic/cimagf128.cpp b/libc/src/complex/generic/cimagf128.cpp
@@ -0,0 +1,25 @@
+//===-- Implementation of cimagf128 function ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/cimagf128.h"
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float128, cimagf128, (cfloat128 x)) {
+  Complex<float128> x_c = cpp::bit_cast<Complex<float128>>(x);
+  return x_c.imag;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LIBC_TYPES_HAS_CFLOAT128
diff --git a/libc/src/complex/generic/cimagf16.cpp b/libc/src/complex/generic/cimagf16.cpp
@@ -0,0 +1,25 @@
+//===-- Implementation of cimagf16 function -------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/cimagf16.h"
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float16, cimagf16, (cfloat16 x)) {
+  Complex<float16> x_c = cpp::bit_cast<Complex<float16>>(x);
+  return x_c.imag;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LIBC_TYPES_HAS_CFLOAT16
diff --git a/libc/src/complex/generic/cimagl.cpp b/libc/src/complex/generic/cimagl.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of cimagl function ---------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/cimagl.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(long double, cimagl, (_Complex long double x)) {
+  Complex<long double> x_c = cpp::bit_cast<Complex<long double>>(x);
+  return x_c.imag;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/complex/generic/creal.cpp b/libc/src/complex/generic/creal.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of creal function ----------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/creal.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(double, creal, (_Complex double x)) {
+  Complex<double> x_c = cpp::bit_cast<Complex<double>>(x);
+  return x_c.real;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/complex/generic/crealf.cpp b/libc/src/complex/generic/crealf.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of crealf function ---------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/crealf.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float, crealf, (_Complex float x)) {
+  Complex<float> x_c = cpp::bit_cast<Complex<float>>(x);
+  return x_c.real;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/complex/generic/crealf128.cpp b/libc/src/complex/generic/crealf128.cpp
@@ -0,0 +1,25 @@
+//===-- Implementation of crealf128 function ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/crealf128.h"
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float128, crealf128, (cfloat128 x)) {
+  Complex<float128> x_c = cpp::bit_cast<Complex<float128>>(x);
+  return x_c.real;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LIBC_TYPES_HAS_CFLOAT128
diff --git a/libc/src/complex/generic/crealf16.cpp b/libc/src/complex/generic/crealf16.cpp
@@ -0,0 +1,25 @@
+//===-- Implementation of crealf16 function -------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/crealf16.h"
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float16, crealf16, (cfloat16 x)) {
+  Complex<float16> x_c = cpp::bit_cast<Complex<float16>>(x);
+  return x_c.real;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LIBC_TYPES_HAS_CFLOAT16
diff --git a/libc/src/complex/generic/creall.cpp b/libc/src/complex/generic/creall.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of creall function ---------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/complex/creall.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+#include "src/__support/complex_type.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(long double, creall, (_Complex long double x)) {
+  Complex<long double> x_c = cpp::bit_cast<Complex<long double>>(x);
+  return x_c.real;
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/src/CMakeLists.txt b/libc/test/src/CMakeLists.txt
@@ -47,6 +47,7 @@ function(add_fp_unittest name)
 endfunction(add_fp_unittest)
 
 add_subdirectory(__support)
+add_subdirectory(complex)
 add_subdirectory(ctype)
 add_subdirectory(errno)
 add_subdirectory(fenv)

diff --git a/libc/test/src/complex/CImagTest.h b/libc/test/src/complex/CImagTest.h
@@ -0,0 +1,74 @@
+//===-- Utility class to test different flavors of cimag --------*- 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_SRC_COMPLEX_CIMAGTEST_H
+#define LLVM_LIBC_TEST_SRC_COMPLEX_CIMAGTEST_H
+
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "hdr/math_macros.h"
+
+template <typename CFPT, typename FPT>
+class CImagTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+  DECLARE_SPECIAL_CONSTANTS(FPT)
+
+public:
+  typedef FPT (*CImagFunc)(CFPT);
+
+  void testSpecialNumbers(CImagFunc func) {
+    EXPECT_FP_EQ(func(CFPT(67.123 + aNaN * 1.0i)), aNaN);
+    EXPECT_FP_EQ(func(CFPT(78.319 + neg_aNaN * 1.0i)), neg_aNaN);
+    EXPECT_FP_EQ(func(CFPT(7813.131 + sNaN * 1.0i)), sNaN);
+    EXPECT_FP_EQ(func(CFPT(7824.152 + neg_sNaN * 1.0i)), neg_sNaN);
+    EXPECT_FP_EQ(func(CFPT(9024.2442 + inf * 1.0i)), inf);
+    EXPECT_FP_EQ(func(CFPT(8923.124 + neg_inf * 1.0i)), neg_inf);
+    EXPECT_FP_EQ(func(CFPT(782.124 + min_normal * 1.0i)), min_normal);
+    EXPECT_FP_EQ(func(CFPT(2141.2352 + max_normal * 1.0i)), max_normal);
+    EXPECT_FP_EQ(func(CFPT(341.134 + neg_max_normal * 1.0i)), neg_max_normal);
+    EXPECT_FP_EQ(func(CFPT(781.142 + min_denormal * 1.0i)), min_denormal);
+    EXPECT_FP_EQ(func(CFPT(781.134 + neg_min_denormal * 1.0i)),
+                 neg_min_denormal);
+    EXPECT_FP_EQ(func(CFPT(1241.112 + max_denormal * 1.0i)), max_denormal);
+    EXPECT_FP_EQ(func(CFPT(121.121 + zero * 1.0i)), zero);
+    EXPECT_FP_EQ(func(CFPT(neg_zero + zero * 1.0i)), zero);
+    EXPECT_FP_EQ(func(CFPT(neg_zero + neg_zero * 1.0i)), neg_zero);
+    EXPECT_FP_EQ(func(CFPT(zero + neg_zero * 1.0i)), neg_zero);
+  }
+
+  void testRoundedNumbers(CImagFunc func) {
+    EXPECT_FP_EQ(func((CFPT)(4523.1413 + 12413.1414i)), (FPT)(12413.1414));
+    EXPECT_FP_EQ(func((CFPT)(-4523.1413 + 12413.1414i)), (FPT)(12413.1414));
+    EXPECT_FP_EQ(func((CFPT)(4523.1413 - 12413.1414i)), (FPT)(-12413.1414));
+    EXPECT_FP_EQ(func((CFPT)(-4523.1413 - 12413.1414i)), (FPT)(-12413.1414));
+
+    EXPECT_FP_EQ(func((CFPT)(3210.5678 + 9876.5432i)), (FPT)(9876.5432));
+    EXPECT_FP_EQ(func((CFPT)(-3210.5678 + 9876.5432i)), (FPT)(9876.5432));
+    EXPECT_FP_EQ(func((CFPT)(3210.5678 - 9876.5432i)), (FPT)(-9876.5432));
+    EXPECT_FP_EQ(func((CFPT)(-3210.5678 - 9876.5432i)), (FPT)(-9876.5432));
+
+    EXPECT_FP_EQ(func((CFPT)(1234.4321 + 4321.1234i)), (FPT)(4321.1234));
+    EXPECT_FP_EQ(func((CFPT)(-1234.4321 + 4321.1234i)), (FPT)(4321.1234));
+    EXPECT_FP_EQ(func((CFPT)(1234.4321 - 4321.1234i)), (FPT)(-4321.1234));
+    EXPECT_FP_EQ(func((CFPT)(-1234.4321 - 4321.1234i)), (FPT)(-4321.1234));
+
+    EXPECT_FP_EQ(func((CFPT)(6789.1234 + 8765.6789i)), (FPT)(8765.6789));
+    EXPECT_FP_EQ(func((CFPT)(-6789.1234 + 8765.6789i)), (FPT)(8765.6789));
+    EXPECT_FP_EQ(func((CFPT)(6789.1234 - 8765.6789i)), (FPT)(-8765.6789));
+    EXPECT_FP_EQ(func((CFPT)(-6789.1234 - 8765.6789i)), (FPT)(-8765.6789));
+  }
+};
+
+#define LIST_CIMAG_TESTS(U, T, func)                                           \
+  using LlvmLibcCImagTest = CImagTest<U, T>;                                   \
+  TEST_F(LlvmLibcCImagTest, SpecialNumbers) { testSpecialNumbers(&func); }     \
+  TEST_F(LlvmLibcCImagTest, RoundedNumbers) { testRoundedNumbers(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_COMPLEX_CIMAGTEST_H
diff --git a/libc/test/src/complex/CMakeLists.txt b/libc/test/src/complex/CMakeLists.txt
@@ -0,0 +1,121 @@
+add_custom_target(libc-complex-unittests)
+
+add_libc_test(
+  creal_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    creal_test.cpp
+  DEPENDS
+    libc.src.complex.creal
+  LINK_LIBRARIES
+      LibcFPTestHelpers
+)
+
+add_libc_test(
+  crealf_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    crealf_test.cpp
+  DEPENDS
+    libc.src.complex.crealf
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  creall_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    creall_test.cpp
+  DEPENDS
+    libc.src.complex.creall
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  crealf16_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    crealf16_test.cpp
+  DEPENDS
+    libc.src.complex.crealf16
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  crealf128_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    crealf128_test.cpp
+  DEPENDS
+    libc.src.complex.crealf128
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  cimag_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    cimag_test.cpp
+  DEPENDS
+    libc.src.complex.cimag
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  cimagf_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    cimagf_test.cpp
+  DEPENDS
+    libc.src.complex.cimagf
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  cimagl_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    cimagl_test.cpp
+  DEPENDS
+    libc.src.complex.cimagl
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  cimagf16_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    cimagf16_test.cpp
+  DEPENDS
+    libc.src.complex.cimagf16
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
+
+add_libc_test(
+  cimagf128_test
+  SUITE
+    libc-complex-unittests
+  SRCS
+    cimagf128_test.cpp
+  DEPENDS
+    libc.src.complex.cimagf128
+  LINK_LIBRARIES
+    LibcFPTestHelpers
+)
diff --git a/libc/test/src/complex/CRealTest.h b/libc/test/src/complex/CRealTest.h
@@ -0,0 +1,72 @@
+//===-- Utility class to test different flavors of creal --------*- 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_SRC_COMPLEX_CREALTEST_H
+#define LLVM_LIBC_TEST_SRC_COMPLEX_CREALTEST_H
+
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include "hdr/math_macros.h"
+
+template <typename CFPT, typename FPT>
+class CRealTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+  DECLARE_SPECIAL_CONSTANTS(FPT)
+
+public:
+  typedef FPT (*CRealFunc)(CFPT);
+
+  void testSpecialNumbers(CRealFunc func) {
+    EXPECT_FP_EQ(func(CFPT(aNaN + 67.123i)), aNaN);
+    EXPECT_FP_EQ(func(CFPT(neg_aNaN + 78.319i)), neg_aNaN);
+    EXPECT_FP_EQ(func(CFPT(sNaN + 7813.131i)), sNaN);
+    EXPECT_FP_EQ(func(CFPT(neg_sNaN + 7824.152i)), neg_sNaN);
+    EXPECT_FP_EQ(func(CFPT(inf + 9024.2442i)), inf);
+    EXPECT_FP_EQ(func(CFPT(neg_inf + 8923.124i)), neg_inf);
+    EXPECT_FP_EQ(func(CFPT(min_normal + 782.124i)), min_normal);
+    EXPECT_FP_EQ(func(CFPT(max_normal + 2141.2352i)), max_normal);
+    EXPECT_FP_EQ(func(CFPT(neg_max_normal + 341.134i)), neg_max_normal);
+    EXPECT_FP_EQ(func(CFPT(min_denormal + 781.142i)), min_denormal);
+    EXPECT_FP_EQ(func(CFPT(neg_min_denormal + 781.134i)), neg_min_denormal);
+    EXPECT_FP_EQ(func(CFPT(max_denormal + 1241.112i)), max_denormal);
+    EXPECT_FP_EQ(func(CFPT(zero + 121.121i)), zero);
+    EXPECT_FP_EQ(func(CFPT(neg_zero + neg_zero * 1.0i)), neg_zero);
+    EXPECT_FP_EQ(func(CFPT(neg_zero + zero * 1.0i)), zero);
+  }
+
+  void testRoundedNumbers(CRealFunc func) {
+    EXPECT_FP_EQ(func((CFPT)(4523.1413 + 12413.1414i)), (FPT)(4523.1413));
+    EXPECT_FP_EQ(func((CFPT)(-4523.1413 + 12413.1414i)), (FPT)(-4523.1413));
+    EXPECT_FP_EQ(func((CFPT)(4523.1413 - 12413.1414i)), (FPT)(4523.1413));
+    EXPECT_FP_EQ(func((CFPT)(-4523.1413 - 12413.1414i)), (FPT)(-4523.1413));
+
+    EXPECT_FP_EQ(func((CFPT)(3210.5678 + 9876.5432i)), (FPT)(3210.5678));
+    EXPECT_FP_EQ(func((CFPT)(-3210.5678 + 9876.5432i)), (FPT)(-3210.5678));
+    EXPECT_FP_EQ(func((CFPT)(3210.5678 - 9876.5432i)), (FPT)(3210.5678));
+    EXPECT_FP_EQ(func((CFPT)(-3210.5678 - 9876.5432i)), (FPT)(-3210.5678));
+
+    EXPECT_FP_EQ(func((CFPT)(1234.4321 + 4321.1234i)), (FPT)(1234.4321));
+    EXPECT_FP_EQ(func((CFPT)(-1234.4321 + 4321.1234i)), (FPT)(-1234.4321));
+    EXPECT_FP_EQ(func((CFPT)(1234.4321 - 4321.1234i)), (FPT)(1234.4321));
+    EXPECT_FP_EQ(func((CFPT)(-1234.4321 - 4321.1234i)), (FPT)(-1234.4321));
+
+    EXPECT_FP_EQ(func((CFPT)(6789.1234 + 8765.6789i)), (FPT)(6789.1234));
+    EXPECT_FP_EQ(func((CFPT)(-6789.1234 + 8765.6789i)), (FPT)(-6789.1234));
+    EXPECT_FP_EQ(func((CFPT)(6789.1234 - 8765.6789i)), (FPT)(6789.1234));
+    EXPECT_FP_EQ(func((CFPT)(-6789.1234 - 8765.6789i)), (FPT)(-6789.1234));
+  }
+};
+
+#define LIST_CREAL_TESTS(U, T, func)                                           \
+  using LlvmLibcCRealTest = CRealTest<U, T>;                                   \
+  TEST_F(LlvmLibcCRealTest, SpecialNumbers) { testSpecialNumbers(&func); }     \
+  TEST_F(LlvmLibcCRealTest, RoundedNumbers) { testRoundedNumbers(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_COMPLEX_CREALTEST_H
diff --git a/libc/test/src/complex/cimag_test.cpp b/libc/test/src/complex/cimag_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for cimag -----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CImagTest.h"
+
+#include "src/complex/cimag.h"
+
+LIST_CIMAG_TESTS(_Complex double, double, LIBC_NAMESPACE::cimag)
diff --git a/libc/test/src/complex/cimagf128_test.cpp b/libc/test/src/complex/cimagf128_test.cpp
@@ -0,0 +1,17 @@
+//===-- Unittests for cimagf128 -------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CImagTest.h"
+
+#include "src/complex/cimagf128.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+LIST_CIMAG_TESTS(cfloat128, float128, LIBC_NAMESPACE::cimagf128)
+
+#endif // LIBC_TYPES_HAS_CFLOAT128
diff --git a/libc/test/src/complex/cimagf16_test.cpp b/libc/test/src/complex/cimagf16_test.cpp
@@ -0,0 +1,17 @@
+//===-- Unittests for cimagf16 --------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CImagTest.h"
+
+#include "src/complex/cimagf16.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+LIST_CIMAG_TESTS(cfloat16, float16, LIBC_NAMESPACE::cimagf16)
+
+#endif // LIBC_TYPES_HAS_CFLOAT16
diff --git a/libc/test/src/complex/cimagf_test.cpp b/libc/test/src/complex/cimagf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for cimagf ----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CImagTest.h"
+
+#include "src/complex/cimagf.h"
+
+LIST_CIMAG_TESTS(_Complex float, float, LIBC_NAMESPACE::cimagf)
diff --git a/libc/test/src/complex/cimagl_test.cpp b/libc/test/src/complex/cimagl_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for cimagl ----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CImagTest.h"
+
+#include "src/complex/cimagl.h"
+
+LIST_CIMAG_TESTS(_Complex long double, long double, LIBC_NAMESPACE::cimagl)
diff --git a/libc/test/src/complex/creal_test.cpp b/libc/test/src/complex/creal_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for creal -----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CRealTest.h"
+
+#include "src/complex/creal.h"
+
+LIST_CREAL_TESTS(_Complex double, double, LIBC_NAMESPACE::creal)
diff --git a/libc/test/src/complex/crealf128_test.cpp b/libc/test/src/complex/crealf128_test.cpp
@@ -0,0 +1,17 @@
+//===-- Unittests for crealf128 -------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CRealTest.h"
+
+#include "src/complex/crealf128.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+LIST_CREAL_TESTS(cfloat128, float128, LIBC_NAMESPACE::crealf128)
+
+#endif // LIBC_TYPES_HAS_CFLOAT128
diff --git a/libc/test/src/complex/crealf16_test.cpp b/libc/test/src/complex/crealf16_test.cpp
@@ -0,0 +1,17 @@
+//===-- Unittests for crealf16 --------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CRealTest.h"
+
+#include "src/complex/crealf16.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+LIST_CREAL_TESTS(cfloat16, float16, LIBC_NAMESPACE::crealf16)
+
+#endif // LIBC_TYPES_HAS_CFLOAT16
diff --git a/libc/test/src/complex/crealf_test.cpp b/libc/test/src/complex/crealf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for crealf ----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CRealTest.h"
+
+#include "src/complex/crealf.h"
+
+LIST_CREAL_TESTS(_Complex float, float, LIBC_NAMESPACE::crealf)
diff --git a/libc/test/src/complex/creall_test.cpp b/libc/test/src/complex/creall_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for creall ----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "CRealTest.h"
+
+#include "src/complex/creall.h"
+
+LIST_CREAL_TESTS(_Complex long double, long double, LIBC_NAMESPACE::creall)