diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
@@ -969,10 +969,10 @@ add_entrypoint_object(
     ilogb.cpp
   HDRS
     ../ilogb.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -981,10 +981,10 @@ add_entrypoint_object(
     ilogbf.cpp
   HDRS
     ../ilogbf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -993,10 +993,72 @@ add_entrypoint_object(
     ilogbl.cpp
   HDRS
     ../ilogbl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  ilogbf128
+  SRCS
+    ilogbf128.cpp
+  HDRS
+    ../ilogbf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.float
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  llogb
+  SRCS
+    llogb.cpp
+  HDRS
+    ../llogb.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  llogbf
+  SRCS
+    llogbf.cpp
+  HDRS
+    ../llogbf.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  llogbl
+  SRCS
+    llogbl.cpp
+  HDRS
+    ../llogbl.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  llogbf128
+  SRCS
+    llogbf128.cpp
+  HDRS
+    ../llogbf128.h
+  COMPILE_OPTIONS
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.float
+    libc.src.__support.FPUtil.manipulation_functions
 )
 
 add_entrypoint_object(
@@ -1044,8 +1106,8 @@ add_entrypoint_object(
   COMPILE_OPTIONS
     -O3
   DEPENDS
-  libc.src.__support.macros.properties.float
-  libc.src.__support.FPUtil.manipulation_functions
+    libc.src.__support.macros.properties.float
+    libc.src.__support.FPUtil.manipulation_functions
 )
 
 add_object_library(
@@ -1229,10 +1291,10 @@ add_entrypoint_object(
     logb.cpp
   HDRS
     ../logb.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -1241,10 +1303,10 @@ add_entrypoint_object(
     logbf.cpp
   HDRS
     ../logbf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -1253,10 +1315,22 @@ add_entrypoint_object(
     logbl.cpp
   HDRS
     ../logbl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_entrypoint_object(
+  logbf128
+  SRCS
+    logbf128.cpp
+  HDRS
+    ../logbf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.FPUtil.manipulation_functions
 )
 
 add_entrypoint_object(

diff --git a/libc/src/math/generic/ilogb.cpp b/libc/src/math/generic/ilogb.cpp
@@ -12,6 +12,6 @@
 
 namespace LIBC_NAMESPACE {
 
-LLVM_LIBC_FUNCTION(int, ilogb, (double x)) { return fputil::ilogb(x); }
+LLVM_LIBC_FUNCTION(int, ilogb, (double x)) { return fputil::intlogb<int>(x); }
 
 } // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/ilogbf.cpp b/libc/src/math/generic/ilogbf.cpp
@@ -12,6 +12,6 @@
 
 namespace LIBC_NAMESPACE {
 
-LLVM_LIBC_FUNCTION(int, ilogbf, (float x)) { return fputil::ilogb(x); }
+LLVM_LIBC_FUNCTION(int, ilogbf, (float x)) { return fputil::intlogb<int>(x); }
 
 } // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/ilogbf128.cpp b/libc/src/math/generic/ilogbf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of ilogbf128 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/math/ilogbf128.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, ilogbf128, (float128 x)) {
+  return fputil::intlogb<int>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/ilogbl.cpp b/libc/src/math/generic/ilogbl.cpp
@@ -12,6 +12,8 @@
 
 namespace LIBC_NAMESPACE {
 
-LLVM_LIBC_FUNCTION(int, ilogbl, (long double x)) { return fputil::ilogb(x); }
+LLVM_LIBC_FUNCTION(int, ilogbl, (long double x)) {
+  return fputil::intlogb<int>(x);
+}
 
 } // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/llogb.cpp b/libc/src/math/generic/llogb.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of llogb 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/math/llogb.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, llogb, (double x)) { return fputil::intlogb<long>(x); }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/llogbf.cpp b/libc/src/math/generic/llogbf.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of llogbf 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/math/llogbf.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, llogbf, (float x)) { return fputil::intlogb<long>(x); }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/llogbf128.cpp b/libc/src/math/generic/llogbf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of llogbf128 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/math/llogbf128.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, llogbf128, (float128 x)) {
+  return fputil::intlogb<long>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/llogbl.cpp b/libc/src/math/generic/llogbl.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of llogbl 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/math/llogbl.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, llogbl, (long double x)) {
+  return fputil::intlogb<long>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/logbf.cpp b/libc/src/math/generic/logbf.cpp
@@ -1,4 +1,4 @@
-//===-- Implementation of logbf function ---------------------------------===//
+//===-- Implementation of logbf function ----------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.

diff --git a/libc/src/math/generic/logbf128.cpp b/libc/src/math/generic/logbf128.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of logbf128 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/math/logbf128.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float128, logbf128, (float128 x)) { return fputil::logb(x); }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/ilogbf128.h b/libc/src/math/ilogbf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for ilogbf128 ---------------------*- 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_ILOGBF128_H
+#define LLVM_LIBC_SRC_MATH_ILOGBF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+int ilogbf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_ILOGBF128_H
diff --git a/libc/src/math/llogb.h b/libc/src/math/llogb.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llogb -------------------------*- 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_LLOGB_H
+#define LLVM_LIBC_SRC_MATH_LLOGB_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+long llogb(double x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLOGB_H
diff --git a/libc/src/math/llogbf.h b/libc/src/math/llogbf.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llogbf ------------------------*- 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_LLOGBF_H
+#define LLVM_LIBC_SRC_MATH_LLOGBF_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+long llogbf(float x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLOGBF_H
diff --git a/libc/src/math/llogbf128.h b/libc/src/math/llogbf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llogbf128 ---------------------*- 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_LLOGBF128_H
+#define LLVM_LIBC_SRC_MATH_LLOGBF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+long llogbf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLOGBF128_H
diff --git a/libc/src/math/llogbl.h b/libc/src/math/llogbl.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llogbl ------------------------*- 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_LLOGBL_H
+#define LLVM_LIBC_SRC_MATH_LLOGBL_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+long llogbl(long double x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLOGBL_H
diff --git a/libc/src/math/logbf128.h b/libc/src/math/logbf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for logbf128  ---------------------*- 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_LOGBF128_H
+#define LLVM_LIBC_SRC_MATH_LOGBF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 logbf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LOGBF128_H
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
@@ -769,7 +769,6 @@ if(NOT LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
     HDRS
       ILogbTest.h
     DEPENDS
-      libc.include.math
       libc.src.math.ilogb
       libc.src.__support.CPP.limits
       libc.src.__support.FPUtil.fp_bits
@@ -785,7 +784,6 @@ if(NOT LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
     HDRS
       ILogbTest.h
     DEPENDS
-      libc.include.math
       libc.src.math.ilogbf
       libc.src.__support.CPP.limits
       libc.src.__support.FPUtil.fp_bits
@@ -802,13 +800,87 @@ add_fp_unittest(
   HDRS
     ILogbTest.h
   DEPENDS
-    libc.include.math
     libc.src.math.ilogbl
     libc.src.__support.CPP.limits
     libc.src.__support.FPUtil.fp_bits
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_fp_unittest(
+  ilogbf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    ilogbf128_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.src.math.ilogbf128
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_fp_unittest(
+  llogb_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llogb_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.src.math.llogb
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_fp_unittest(
+  llogbf_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llogbf_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.src.math.llogbf
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_fp_unittest(
+  llogbl_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llogbl_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.src.math.llogbl
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
+add_fp_unittest(
+  llogbf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llogbf128_test.cpp
+  HDRS
+    ILogbTest.h
+  DEPENDS
+    libc.src.math.llogbf128
+    libc.src.__support.CPP.limits
+    libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
 add_fp_unittest(
   ldexp_test
   SUITE
@@ -876,7 +948,6 @@ add_fp_unittest(
   SRCS
     logb_test.cpp
   DEPENDS
-    libc.include.math
     libc.src.math.logb
     libc.src.__support.FPUtil.manipulation_functions
 )
@@ -888,7 +959,6 @@ add_fp_unittest(
   SRCS
     logbf_test.cpp
   DEPENDS
-    libc.include.math
     libc.src.math.logbf
     libc.src.__support.FPUtil.manipulation_functions
 )
@@ -902,11 +972,21 @@ add_fp_unittest(
   HDRS
     LogbTest.h
   DEPENDS
-    libc.include.math
     libc.src.math.logbl
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_fp_unittest(
+  logbf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    logbf128_test.cpp
+  DEPENDS
+    libc.src.math.logbf128
+    libc.src.__support.FPUtil.manipulation_functions
+)
+
 add_fp_unittest(
   modf_test
   SUITE

diff --git a/libc/test/src/math/smoke/ILogbTest.h b/libc/test/src/math/smoke/ILogbTest.h
@@ -13,101 +13,110 @@
 #include "src/__support/FPUtil/FPBits.h"
 #include "src/__support/FPUtil/ManipulationFunctions.h"
 #include "test/UnitTest/Test.h"
-#include <math.h>
 
+template <typename OutType, typename InType>
 class LlvmLibcILogbTest : public LIBC_NAMESPACE::testing::Test {
+  using FPBits = LIBC_NAMESPACE::fputil::FPBits<InType>;
+  using StorageType = typename FPBits::StorageType;
+  using Sign = LIBC_NAMESPACE::fputil::Sign;
+
 public:
-  template <typename T> struct ILogbFunc {
-    typedef int (*Func)(T);
-  };
-
-  template <typename T>
-  void test_special_numbers(typename ILogbFunc<T>::Func func) {
-    using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;
-    using Sign = LIBC_NAMESPACE::fputil::Sign;
-    EXPECT_EQ(FP_ILOGB0, func(FPBits::zero(Sign::POS).get_val()));
-    EXPECT_EQ(FP_ILOGB0, func(FPBits::zero(Sign::NEG).get_val()));
-    EXPECT_EQ(FP_ILOGBNAN, func(FPBits::quiet_nan().get_val()));
-    EXPECT_EQ(INT_MAX, func(FPBits::inf(Sign::POS).get_val()));
-    EXPECT_EQ(INT_MAX, func(FPBits::inf(Sign::NEG).get_val()));
+  typedef OutType (*Func)(InType);
+
+  void test_special_numbers(Func func) {
+    EXPECT_EQ(LIBC_NAMESPACE::fputil::IntLogbConstants<OutType>::FP_LOGB0,
+              func(FPBits::zero(Sign::POS).get_val()));
+    EXPECT_EQ(LIBC_NAMESPACE::fputil::IntLogbConstants<OutType>::FP_LOGB0,
+              func(FPBits::zero(Sign::NEG).get_val()));
+    EXPECT_EQ(LIBC_NAMESPACE::fputil::IntLogbConstants<OutType>::FP_LOGBNAN,
+              func(FPBits::quiet_nan().get_val()));
+    EXPECT_EQ(LIBC_NAMESPACE::fputil::IntLogbConstants<OutType>::T_MAX,
+              func(FPBits::inf(Sign::POS).get_val()));
+    EXPECT_EQ(LIBC_NAMESPACE::fputil::IntLogbConstants<OutType>::T_MAX,
+              func(FPBits::inf(Sign::NEG).get_val()));
   }
 
-  template <typename T>
-  void test_powers_of_two(typename ILogbFunc<T>::Func func) {
-    EXPECT_EQ(0, func(T(1.0)));
-    EXPECT_EQ(0, func(T(-1.0)));
+  void test_powers_of_two(Func func) {
+    EXPECT_EQ(OutType(0), func(InType(1.0)));
+    EXPECT_EQ(OutType(0), func(InType(-1.0)));
 
-    EXPECT_EQ(1, func(T(2.0)));
-    EXPECT_EQ(1, func(T(-2.0)));
+    EXPECT_EQ(OutType(1), func(InType(2.0)));
+    EXPECT_EQ(OutType(1), func(InType(-2.0)));
 
-    EXPECT_EQ(2, func(T(4.0)));
-    EXPECT_EQ(2, func(T(-4.0)));
+    EXPECT_EQ(OutType(2), func(InType(4.0)));
+    EXPECT_EQ(OutType(2), func(InType(-4.0)));
 
-    EXPECT_EQ(3, func(T(8.0)));
-    EXPECT_EQ(3, func(-8.0));
+    EXPECT_EQ(OutType(3), func(InType(8.0)));
+    EXPECT_EQ(OutType(3), func(-8.0));
 
-    EXPECT_EQ(4, func(16.0));
-    EXPECT_EQ(4, func(-16.0));
+    EXPECT_EQ(OutType(4), func(16.0));
+    EXPECT_EQ(OutType(4), func(-16.0));
 
-    EXPECT_EQ(5, func(32.0));
-    EXPECT_EQ(5, func(-32.0));
+    EXPECT_EQ(OutType(5), func(32.0));
+    EXPECT_EQ(OutType(5), func(-32.0));
   }
 
-  template <typename T>
-  void test_some_integers(typename ILogbFunc<T>::Func func) {
-    EXPECT_EQ(1, func(T(3.0)));
-    EXPECT_EQ(1, func(T(-3.0)));
+  void test_some_integers(Func func) {
+    EXPECT_EQ(OutType(1), func(InType(3.0)));
+    EXPECT_EQ(OutType(1), func(InType(-3.0)));
 
-    EXPECT_EQ(2, func(T(7.0)));
-    EXPECT_EQ(2, func(T(-7.0)));
+    EXPECT_EQ(OutType(2), func(InType(7.0)));
+    EXPECT_EQ(OutType(2), func(InType(-7.0)));
 
-    EXPECT_EQ(3, func(T(10.0)));
-    EXPECT_EQ(3, func(T(-10.0)));
+    EXPECT_EQ(OutType(3), func(InType(10.0)));
+    EXPECT_EQ(OutType(3), func(InType(-10.0)));
 
-    EXPECT_EQ(4, func(T(31.0)));
-    EXPECT_EQ(4, func(-31.0));
+    EXPECT_EQ(OutType(4), func(InType(31.0)));
+    EXPECT_EQ(OutType(4), func(-31.0));
 
-    EXPECT_EQ(5, func(55.0));
-    EXPECT_EQ(5, func(-55.0));
+    EXPECT_EQ(OutType(5), func(55.0));
+    EXPECT_EQ(OutType(5), func(-55.0));
   }
 
-  template <typename T>
-  void test_subnormal_range(typename ILogbFunc<T>::Func func) {
-    using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;
-    using StorageType = typename FPBits::StorageType;
+  void test_subnormal_range(Func func) {
     constexpr StorageType MIN_SUBNORMAL = FPBits::min_subnormal().uintval();
     constexpr StorageType MAX_SUBNORMAL = FPBits::max_subnormal().uintval();
     constexpr StorageType COUNT = 10'001;
     constexpr StorageType STEP = (MAX_SUBNORMAL - MIN_SUBNORMAL) / COUNT;
     for (StorageType v = MIN_SUBNORMAL; v <= MAX_SUBNORMAL; v += STEP) {
-      T x = FPBits(v).get_val();
-      if (isnan(x) || isinf(x) || x == 0.0)
+      FPBits x_bits = FPBits(v);
+      if (x_bits.is_zero() || x_bits.is_inf_or_nan())
         continue;
 
+      InType x = x_bits.get_val();
+
       int exponent;
       LIBC_NAMESPACE::fputil::frexp(x, exponent);
-      ASSERT_EQ(exponent, func(x) + 1);
+      ASSERT_EQ(static_cast<OutType>(exponent), func(x) + OutType(1));
     }
   }
 
-  template <typename T>
-  void test_normal_range(typename ILogbFunc<T>::Func func) {
-    using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;
-    using StorageType = typename FPBits::StorageType;
+  void test_normal_range(Func func) {
     constexpr StorageType MIN_NORMAL = FPBits::min_normal().uintval();
     constexpr StorageType MAX_NORMAL = FPBits::max_normal().uintval();
     constexpr StorageType COUNT = 10'001;
     constexpr StorageType STEP = (MAX_NORMAL - MIN_NORMAL) / COUNT;
     for (StorageType v = MIN_NORMAL; v <= MAX_NORMAL; v += STEP) {
-      T x = FPBits(v).get_val();
-      if (isnan(x) || isinf(x) || x == 0.0)
+      FPBits x_bits = FPBits(v);
+      if (x_bits.is_zero() || x_bits.is_inf_or_nan())
         continue;
 
+      InType x = x_bits.get_val();
+
       int exponent;
       LIBC_NAMESPACE::fputil::frexp(x, exponent);
-      ASSERT_EQ(exponent, func(x) + 1);
+      ASSERT_EQ(static_cast<OutType>(exponent), func(x) + OutType(1));
     }
   }
 };
 
+#define LIST_INTLOGB_TESTS(OutType, InType, Func)                              \
+  using LlvmLibcIntLogbTest = LlvmLibcILogbTest<OutType, InType>;              \
+  TEST_F(LlvmLibcIntLogbTest, SpecialNumbers) { test_special_numbers(&Func); } \
+  TEST_F(LlvmLibcIntLogbTest, PowersOfTwo) { test_powers_of_two(&Func); }      \
+  TEST_F(LlvmLibcIntLogbTest, SomeIntegers) { test_some_integers(&Func); }     \
+  TEST_F(LlvmLibcIntLogbTest, SubnormalRange) { test_subnormal_range(&Func); } \
+  TEST_F(LlvmLibcIntLogbTest, NormalRange) { test_normal_range(&Func); }       \
+  static_assert(true)
+
 #endif // LLVM_LIBC_TEST_SRC_MATH_ILOGBTEST_H
diff --git a/libc/test/src/math/smoke/LogbTest.h b/libc/test/src/math/smoke/LogbTest.h
@@ -10,8 +10,6 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
-#include <math.h>
-
 template <typename T> class LogbTest : public LIBC_NAMESPACE::testing::Test {
 
   DECLARE_SPECIAL_CONSTANTS(T)
@@ -72,10 +70,12 @@ template <typename T> class LogbTest : public LIBC_NAMESPACE::testing::Test {
     constexpr StorageType COUNT = 100'000;
     constexpr StorageType STEP = STORAGE_MAX / COUNT;
     for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
-      T x = FPBits(v).get_val();
-      if (isnan(x) || isinf(x) || x == 0.0l)
+      FPBits x_bits = FPBits(v);
+      if (x_bits.is_zero() || x_bits.is_inf_or_nan())
         continue;
 
+      T x = x_bits.get_val();
+
       int exponent;
       LIBC_NAMESPACE::fputil::frexp(x, exponent);
       ASSERT_FP_EQ(T(exponent), func(x) + T(1.0));

diff --git a/libc/test/src/math/smoke/ilogb_test.cpp b/libc/test/src/math/smoke/ilogb_test.cpp
@@ -8,29 +8,6 @@
 
 #include "ILogbTest.h"
 
-#include "src/__support/FPUtil/FPBits.h"
-#include "src/__support/FPUtil/ManipulationFunctions.h"
 #include "src/math/ilogb.h"
-#include "test/UnitTest/FPMatcher.h"
-#include "test/UnitTest/Test.h"
-#include <math.h>
 
-TEST_F(LlvmLibcILogbTest, SpecialNumbers_ilogb) {
-  test_special_numbers<double>(&LIBC_NAMESPACE::ilogb);
-}
-
-TEST_F(LlvmLibcILogbTest, PowersOfTwo_ilogb) {
-  test_powers_of_two<double>(&LIBC_NAMESPACE::ilogb);
-}
-
-TEST_F(LlvmLibcILogbTest, SomeIntegers_ilogb) {
-  test_some_integers<double>(&LIBC_NAMESPACE::ilogb);
-}
-
-TEST_F(LlvmLibcILogbTest, SubnormalRange_ilogb) {
-  test_subnormal_range<double>(&LIBC_NAMESPACE::ilogb);
-}
-
-TEST_F(LlvmLibcILogbTest, NormalRange_ilogb) {
-  test_normal_range<double>(&LIBC_NAMESPACE::ilogb);
-}
+LIST_INTLOGB_TESTS(int, double, LIBC_NAMESPACE::ilogb);
diff --git a/libc/test/src/math/smoke/ilogbf128_test.cpp b/libc/test/src/math/smoke/ilogbf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for ilogbf128 -------------------------------------------===//
+//
+// 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 "ILogbTest.h"
+
+#include "src/math/ilogbf128.h"
+
+LIST_INTLOGB_TESTS(int, float128, LIBC_NAMESPACE::ilogbf128);
diff --git a/libc/test/src/math/smoke/ilogbf_test.cpp b/libc/test/src/math/smoke/ilogbf_test.cpp
@@ -8,29 +8,6 @@
 
 #include "ILogbTest.h"
 
-#include "src/__support/FPUtil/FPBits.h"
-#include "src/__support/FPUtil/ManipulationFunctions.h"
 #include "src/math/ilogbf.h"
-#include "test/UnitTest/FPMatcher.h"
-#include "test/UnitTest/Test.h"
-#include <math.h>
 
-TEST_F(LlvmLibcILogbTest, SpecialNumbers_ilogbf) {
-  test_special_numbers<float>(&LIBC_NAMESPACE::ilogbf);
-}
-
-TEST_F(LlvmLibcILogbTest, PowersOfTwo_ilogbf) {
-  test_powers_of_two<float>(&LIBC_NAMESPACE::ilogbf);
-}
-
-TEST_F(LlvmLibcILogbTest, SomeIntegers_ilogbf) {
-  test_some_integers<float>(&LIBC_NAMESPACE::ilogbf);
-}
-
-TEST_F(LlvmLibcILogbTest, SubnormalRange_ilogbf) {
-  test_subnormal_range<float>(&LIBC_NAMESPACE::ilogbf);
-}
-
-TEST_F(LlvmLibcILogbTest, NormalRange_ilogbf) {
-  test_normal_range<float>(&LIBC_NAMESPACE::ilogbf);
-}
+LIST_INTLOGB_TESTS(int, float, LIBC_NAMESPACE::ilogbf);
diff --git a/libc/test/src/math/smoke/ilogbl_test.cpp b/libc/test/src/math/smoke/ilogbl_test.cpp
@@ -8,29 +8,6 @@
 
 #include "ILogbTest.h"
 
-#include "src/__support/FPUtil/FPBits.h"
-#include "src/__support/FPUtil/ManipulationFunctions.h"
 #include "src/math/ilogbl.h"
-#include "test/UnitTest/FPMatcher.h"
-#include "test/UnitTest/Test.h"
-#include <math.h>
 
-TEST_F(LlvmLibcILogbTest, SpecialNumbers_ilogbl) {
-  test_special_numbers<long double>(&LIBC_NAMESPACE::ilogbl);
-}
-
-TEST_F(LlvmLibcILogbTest, PowersOfTwo_ilogbl) {
-  test_powers_of_two<long double>(&LIBC_NAMESPACE::ilogbl);
-}
-
-TEST_F(LlvmLibcILogbTest, SomeIntegers_ilogbl) {
-  test_some_integers<long double>(&LIBC_NAMESPACE::ilogbl);
-}
-
-TEST_F(LlvmLibcILogbTest, SubnormalRange_ilogbl) {
-  test_subnormal_range<long double>(&LIBC_NAMESPACE::ilogbl);
-}
-
-TEST_F(LlvmLibcILogbTest, NormalRange_ilogbl) {
-  test_normal_range<long double>(&LIBC_NAMESPACE::ilogbl);
-}
+LIST_INTLOGB_TESTS(int, long double, LIBC_NAMESPACE::ilogbl);
diff --git a/libc/test/src/math/smoke/llogb_test.cpp b/libc/test/src/math/smoke/llogb_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for llogb -----------------------------------------------===//
+//
+// 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 "ILogbTest.h"
+
+#include "src/math/llogb.h"
+
+LIST_INTLOGB_TESTS(long, double, LIBC_NAMESPACE::llogb);
diff --git a/libc/test/src/math/smoke/llogbf128_test.cpp b/libc/test/src/math/smoke/llogbf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for llogbf128 -------------------------------------------===//
+//
+// 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 "ILogbTest.h"
+
+#include "src/math/llogbf128.h"
+
+LIST_INTLOGB_TESTS(long, float128, LIBC_NAMESPACE::llogbf128);
diff --git a/libc/test/src/math/smoke/llogbf_test.cpp b/libc/test/src/math/smoke/llogbf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for llogbf ----------------------------------------------===//
+//
+// 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 "ILogbTest.h"
+
+#include "src/math/llogbf.h"
+
+LIST_INTLOGB_TESTS(long, float, LIBC_NAMESPACE::llogbf);
diff --git a/libc/test/src/math/smoke/llogbl_test.cpp b/libc/test/src/math/smoke/llogbl_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for llogbl ----------------------------------------------===//
+//
+// 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 "ILogbTest.h"
+
+#include "src/math/llogbl.h"
+
+LIST_INTLOGB_TESTS(long, long double, LIBC_NAMESPACE::llogbl);
diff --git a/libc/test/src/math/smoke/logbf128_test.cpp b/libc/test/src/math/smoke/logbf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for logbf128 --------------------------------------------===//
+//
+// 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 "LogbTest.h"
+
+#include "src/math/logbf128.h"
+
+LIST_LOGB_TESTS(float128, LIBC_NAMESPACE::logbf128)