diff --git a/libc/src/math/ldexpf128.h b/libc/src/math/ldexpf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for ldexpf128 ---------------------*- 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_MATH_LDEXPF128_H
+#define LLVM_LIBC_SRC_MATH_LDEXPF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 ldexpf128(float128 x, int exp);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LDEXPF128_H
diff --git a/libc/test/src/__support/FPUtil/dyadic_float_test.cpp b/libc/test/src/__support/FPUtil/dyadic_float_test.cpp
@@ -56,3 +56,37 @@ TEST(LlvmLibcDyadicFloatTest, QuickMul) {
   Float256 z = quick_mul(x, y);
   EXPECT_FP_EQ_ALL_ROUNDING(double(x) * double(y), double(z));
 }
+
+#define TEST_EDGE_RANGES(Name, Type)                                           \
+  TEST(LlvmLibcDyadicFloatTest, EdgeRanges##Name) {                            \
+    using Bits = LIBC_NAMESPACE::fputil::FPBits<Type>;                         \
+    using DFType = LIBC_NAMESPACE::fputil::DyadicFloat<Bits::STORAGE_LEN>;     \
+    Type max_normal = Bits::max_normal().get_val();                            \
+    Type min_normal = Bits::min_normal().get_val();                            \
+    Type min_subnormal = Bits::min_subnormal().get_val();                      \
+    Type two(2);                                                               \
+                                                                               \
+    DFType x(min_normal);                                                      \
+    EXPECT_FP_EQ_ALL_ROUNDING(min_normal, static_cast<Type>(x));               \
+    --x.exponent;                                                              \
+    EXPECT_FP_EQ(min_normal / two, static_cast<Type>(x));                      \
+                                                                               \
+    DFType y(two *min_normal - min_subnormal);                                 \
+    --y.exponent;                                                              \
+    EXPECT_FP_EQ(min_normal, static_cast<Type>(y));                            \
+                                                                               \
+    DFType z(min_subnormal);                                                   \
+    EXPECT_FP_EQ_ALL_ROUNDING(min_subnormal, static_cast<Type>(z));            \
+    --z.exponent;                                                              \
+    EXPECT_FP_EQ(Bits::zero().get_val(), static_cast<Type>(z));                \
+                                                                               \
+    DFType t(max_normal);                                                      \
+    EXPECT_FP_EQ_ALL_ROUNDING(max_normal, static_cast<Type>(t));               \
+    ++t.exponent;                                                              \
+    EXPECT_FP_EQ(Bits::inf().get_val(), static_cast<Type>(t));                 \
+  }                                                                            \
+  static_assert(true, "Require semicolon.")
+
+TEST_EDGE_RANGES(Float, float);
+TEST_EDGE_RANGES(Double, double);
+TEST_EDGE_RANGES(LongDouble, long double);
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
@@ -878,7 +878,6 @@ add_fp_unittest(
   HDRS
     LdExpTest.h
   DEPENDS
-    libc.include.math
     libc.src.math.ldexp
     libc.src.__support.CPP.limits
     libc.src.__support.FPUtil.fp_bits
@@ -894,7 +893,6 @@ add_fp_unittest(
   HDRS
     LdExpTest.h
   DEPENDS
-    libc.include.math
     libc.src.math.ldexpf
     libc.src.__support.CPP.limits
     libc.src.__support.FPUtil.fp_bits
@@ -910,13 +908,27 @@ add_fp_unittest(
   HDRS
     LdExpTest.h
   DEPENDS
-    libc.include.math
     libc.src.math.ldexpl
     libc.src.__support.CPP.limits
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.normal_float
 )
 
+add_fp_unittest(
+  ldexpf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    ldexpf128_test.cpp
+  HDRS
+    LdExpTest.h
+  DEPENDS
+    libc.src.math.ldexpf128
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.normal_float
+)
+
 add_fp_unittest(
   logb_test
   SUITE

diff --git a/libc/test/src/math/smoke/LdExpTest.h b/libc/test/src/math/smoke/LdExpTest.h
@@ -15,7 +15,6 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
-#include <math.h>
 #include <stdint.h>
 
 template <typename T>
@@ -163,6 +162,7 @@ class LdExpTestTemplate : public LIBC_NAMESPACE::testing::Test {
   TEST_F(LlvmLibcLdExpTest, UnderflowToZeroOnSubnormal) {                      \
     testUnderflowToZeroOnSubnormal(&func);                                     \
   }                                                                            \
-  TEST_F(LlvmLibcLdExpTest, NormalOperation) { testNormalOperation(&func); }
+  TEST_F(LlvmLibcLdExpTest, NormalOperation) { testNormalOperation(&func); }   \
+  static_assert(true)
 
 #endif // LLVM_LIBC_TEST_SRC_MATH_LDEXPTEST_H
diff --git a/libc/test/src/math/smoke/ldexp_test.cpp b/libc/test/src/math/smoke/ldexp_test.cpp
@@ -10,4 +10,4 @@
 
 #include "src/math/ldexp.h"
 
-LIST_LDEXP_TESTS(double, LIBC_NAMESPACE::ldexp)
+LIST_LDEXP_TESTS(double, LIBC_NAMESPACE::ldexp);
diff --git a/libc/test/src/math/smoke/ldexpf128_test.cpp b/libc/test/src/math/smoke/ldexpf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for ldexpf128 -------------------------------------------===//
+//
+// 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 "LdExpTest.h"
+
+#include "src/math/ldexpf128.h"
+
+LIST_LDEXP_TESTS(float128, LIBC_NAMESPACE::ldexpf128);
diff --git a/libc/test/src/math/smoke/ldexpf_test.cpp b/libc/test/src/math/smoke/ldexpf_test.cpp
@@ -10,4 +10,4 @@
 
 #include "src/math/ldexpf.h"
 
-LIST_LDEXP_TESTS(float, LIBC_NAMESPACE::ldexpf)
+LIST_LDEXP_TESTS(float, LIBC_NAMESPACE::ldexpf);
diff --git a/libc/test/src/math/smoke/ldexpl_test.cpp b/libc/test/src/math/smoke/ldexpl_test.cpp
@@ -10,4 +10,4 @@
 
 #include "src/math/ldexpl.h"
 
-LIST_LDEXP_TESTS(long double, LIBC_NAMESPACE::ldexpl)
+LIST_LDEXP_TESTS(long double, LIBC_NAMESPACE::ldexpl);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -10,4 +10,4 @@

		#include "src/math/ldexp.h"

		LIST_LDEXP_TESTS(double, LIBC_NAMESPACE::ldexp)
		LIST_LDEXP_TESTS(double, LIBC_NAMESPACE::ldexp);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -10,4 +10,4 @@

		#include "src/math/ldexpf.h"

		LIST_LDEXP_TESTS(float, LIBC_NAMESPACE::ldexpf)
		LIST_LDEXP_TESTS(float, LIBC_NAMESPACE::ldexpf);
Original file line number	Diff line number	Diff line change
Expand Up		@@ -10,4 +10,4 @@

		#include "src/math/ldexpl.h"

		LIST_LDEXP_TESTS(long double, LIBC_NAMESPACE::ldexpl)
		LIST_LDEXP_TESTS(long double, LIBC_NAMESPACE::ldexpl);