diff --git a/libc/src/math/generic/roundf128.cpp b/libc/src/math/generic/roundf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of roundf128 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/roundf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float128, roundf128, (float128 x)) {
+  return fputil::round(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/truncf128.cpp b/libc/src/math/generic/truncf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of truncf128 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/truncf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float128, truncf128, (float128 x)) {
+  return fputil::trunc(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/roundf128.h b/libc/src/math/roundf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for roundf128 ---------------------*- 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_ROUNDF128_H
+#define LLVM_LIBC_SRC_MATH_ROUNDF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 roundf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_ROUNDF128_H
diff --git a/libc/src/math/truncf128.h b/libc/src/math/truncf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for truncf128 ---------------------*- 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_TRUNCF128_H
+#define LLVM_LIBC_SRC_MATH_TRUNCF128_H
+
+#include "src/__support/macros/properties/float.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 truncf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_TRUNCF128_H
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
@@ -165,6 +165,22 @@ add_fp_unittest(
   UNIT_TEST_ONLY
 )
 
+add_fp_unittest(
+  truncf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    truncf128_test.cpp
+  HDRS
+    TruncTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.truncf128
+    libc.src.__support.FPUtil.fp_bits
+  # FIXME: Currently fails on the GPU build.
+  UNIT_TEST_ONLY
+)
+
 add_fp_unittest(
   ceil_test
   SUITE
@@ -213,6 +229,22 @@ add_fp_unittest(
   UNIT_TEST_ONLY
 )
 
+add_fp_unittest(
+  ceilf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    ceilf128_test.cpp
+  HDRS
+    CeilTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.ceilf128
+    libc.src.__support.FPUtil.fp_bits
+  # FIXME: Currently fails on the GPU build.
+  UNIT_TEST_ONLY
+)
+
 add_fp_unittest(
   floor_test
   SUITE
@@ -261,6 +293,22 @@ add_fp_unittest(
   UNIT_TEST_ONLY
 )
 
+add_fp_unittest(
+  floorf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    floorf128_test.cpp
+  HDRS
+    FloorTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.floorf128
+    libc.src.__support.FPUtil.fp_bits
+  # FIXME: Currently fails on the GPU build.
+  UNIT_TEST_ONLY
+)
+
 add_fp_unittest(
   round_test
   SUITE
@@ -309,6 +357,22 @@ add_fp_unittest(
   UNIT_TEST_ONLY
 )
 
+add_fp_unittest(
+  roundf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    roundf128_test.cpp
+  HDRS
+    RoundTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.roundf128
+    libc.src.__support.FPUtil.fp_bits
+  # FIXME: Currently fails on the GPU build.
+  UNIT_TEST_ONLY
+)
+
 add_fp_unittest(
   lround_test
   SUITE

diff --git a/libc/test/src/math/smoke/ceilf128_test.cpp b/libc/test/src/math/smoke/ceilf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for ceilf128 --------------------------------------------===//
+//
+// 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 "CeilTest.h"
+
+#include "src/math/ceilf128.h"
+
+LIST_CEIL_TESTS(float128, LIBC_NAMESPACE::ceilf128)
diff --git a/libc/test/src/math/smoke/floorf128_test.cpp b/libc/test/src/math/smoke/floorf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for floorf128 -------------------------------------------===//
+//
+// 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 "FloorTest.h"
+
+#include "src/math/floorf128.h"
+
+LIST_FLOOR_TESTS(float128, LIBC_NAMESPACE::floorf128)
diff --git a/libc/test/src/math/smoke/roundf128_test.cpp b/libc/test/src/math/smoke/roundf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for roundf128 -------------------------------------------===//
+//
+// 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 "RoundTest.h"
+
+#include "src/math/roundf128.h"
+
+LIST_ROUND_TESTS(float128, LIBC_NAMESPACE::roundf128)
diff --git a/libc/test/src/math/smoke/truncf128_test.cpp b/libc/test/src/math/smoke/truncf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for truncf128 -------------------------------------------===//
+//
+// 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 "TruncTest.h"
+
+#include "src/math/truncf128.h"
+
+LIST_TRUNC_TESTS(float128, LIBC_NAMESPACE::truncf128)