diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
@@ -375,10 +375,10 @@ add_entrypoint_object(
     lround.cpp
   HDRS
     ../lround.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -387,10 +387,10 @@ add_entrypoint_object(
     lroundf.cpp
   HDRS
     ../lroundf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -399,10 +399,23 @@ add_entrypoint_object(
     lroundl.cpp
   HDRS
     ../lroundl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
+)
+
+add_entrypoint_object(
+  lroundf128
+  SRCS
+    lroundf128.cpp
+  HDRS
+    ../lroundf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.nearest_integer_operations
 )
 
 add_entrypoint_object(
@@ -411,10 +424,10 @@ add_entrypoint_object(
     llround.cpp
   HDRS
     ../llround.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -423,10 +436,10 @@ add_entrypoint_object(
     llroundf.cpp
   HDRS
     ../llroundf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -435,10 +448,23 @@ add_entrypoint_object(
     llroundl.cpp
   HDRS
     ../llroundl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
+)
+
+add_entrypoint_object(
+  llroundf128
+  SRCS
+    llroundf128.cpp
+  HDRS
+    ../llroundf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.nearest_integer_operations
 )
 
 add_entrypoint_object(
@@ -447,10 +473,10 @@ add_entrypoint_object(
     rint.cpp
   HDRS
     ../rint.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -459,10 +485,10 @@ add_entrypoint_object(
     rintf.cpp
   HDRS
     ../rintf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -471,10 +497,23 @@ add_entrypoint_object(
     rintl.cpp
   HDRS
     ../rintl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
+)
+
+add_entrypoint_object(
+  rintf128
+  SRCS
+    rintf128.cpp
+  HDRS
+    ../rintf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.nearest_integer_operations
 )
 
 add_entrypoint_object(
@@ -483,10 +522,10 @@ add_entrypoint_object(
     lrint.cpp
   HDRS
     ../lrint.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -495,10 +534,10 @@ add_entrypoint_object(
     lrintf.cpp
   HDRS
     ../lrintf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -507,10 +546,23 @@ add_entrypoint_object(
     lrintl.cpp
   HDRS
     ../lrintl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
+)
+
+add_entrypoint_object(
+  lrintf128
+  SRCS
+    lrintf128.cpp
+  HDRS
+    ../lrintf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.nearest_integer_operations
 )
 
 add_entrypoint_object(
@@ -519,10 +571,10 @@ add_entrypoint_object(
     llrint.cpp
   HDRS
     ../llrint.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -531,10 +583,10 @@ add_entrypoint_object(
     llrintf.cpp
   HDRS
     ../llrintf.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
-  COMPILE_OPTIONS
-    -O2
 )
 
 add_entrypoint_object(
@@ -543,10 +595,23 @@ add_entrypoint_object(
     llrintl.cpp
   HDRS
     ../llrintl.h
+  COMPILE_OPTIONS
+    -O3
   DEPENDS
     libc.src.__support.FPUtil.nearest_integer_operations
+)
+
+add_entrypoint_object(
+  llrintf128
+  SRCS
+    llrintf128.cpp
+  HDRS
+    ../llrintf128.h
   COMPILE_OPTIONS
-    -O2
+    -O3
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.nearest_integer_operations
 )
 
 add_entrypoint_object(

diff --git a/libc/src/math/generic/llrintf128.cpp b/libc/src/math/generic/llrintf128.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of llrintf128 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/llrintf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long long, llrintf128, (float128 x)) {
+  return fputil::round_to_signed_integer_using_current_rounding_mode<float128,
+                                                                     long long>(
+      x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/llroundf128.cpp b/libc/src/math/generic/llroundf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of llroundf128 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/llroundf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long long, llroundf128, (float128 x)) {
+  return fputil::round_to_signed_integer<float128, long long>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/lrintf128.cpp b/libc/src/math/generic/lrintf128.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of lrintf128 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/lrintf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, lrintf128, (float128 x)) {
+  return fputil::round_to_signed_integer_using_current_rounding_mode<float128,
+                                                                     long>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/lroundf128.cpp b/libc/src/math/generic/lroundf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of lroundf128 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/lroundf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long, lroundf128, (float128 x)) {
+  return fputil::round_to_signed_integer<float128, long>(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/rintf128.cpp b/libc/src/math/generic/rintf128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of rintf128 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/rintf128.h"
+#include "src/__support/FPUtil/NearestIntegerOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float128, rintf128, (float128 x)) {
+  return fputil::round_using_current_rounding_mode(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/llrintf128.h b/libc/src/math/llrintf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llrintf128 --------------------*- 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_LLRINTF128_H
+#define LLVM_LIBC_SRC_MATH_LLRINTF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+long long llrintf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLRINTF128_H
diff --git a/libc/src/math/llroundf128.h b/libc/src/math/llroundf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for llroundf128 -------------------*- 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_LLROUNDF128_H
+#define LLVM_LIBC_SRC_MATH_LLROUNDF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+long long llroundf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LLROUNDF128_H
diff --git a/libc/src/math/lrintf128.h b/libc/src/math/lrintf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for lrintf128 ---------------------*- 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_LRINTF128_H
+#define LLVM_LIBC_SRC_MATH_LRINTF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+long lrintf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LRINTF128_H
diff --git a/libc/src/math/lroundf128.h b/libc/src/math/lroundf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for lroundf128 --------------------*- 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_LROUNDF128_H
+#define LLVM_LIBC_SRC_MATH_LROUNDF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+long lroundf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_LROUNDF128_H
diff --git a/libc/src/math/rintf128.h b/libc/src/math/rintf128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for rintf128 ----------------------*- 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_RINTF128_H
+#define LLVM_LIBC_SRC_MATH_RINTF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 rintf128(float128 x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_RINTF128_H
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
@@ -387,6 +387,24 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  lroundf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    lroundf128_test.cpp
+  HDRS
+    RoundToIntegerTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.errno.errno
+    libc.src.fenv.feclearexcept
+    libc.src.fenv.feraiseexcept
+    libc.src.fenv.fetestexcept
+    libc.src.math.lroundf128
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   llround_test
   SUITE
@@ -441,6 +459,24 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  llroundf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llroundf128_test.cpp
+  HDRS
+    RoundToIntegerTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.errno.errno
+    libc.src.fenv.feclearexcept
+    libc.src.fenv.feraiseexcept
+    libc.src.fenv.fetestexcept
+    libc.src.math.llroundf128
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   rint_test
   SUITE
@@ -486,6 +522,21 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  rintf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    rintf128_test.cpp
+  HDRS
+    RIntTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.rintf128
+    libc.src.__support.FPUtil.fenv_impl
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   lrint_test
   SUITE
@@ -531,6 +582,21 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  lrintf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    lrintf128_test.cpp
+  HDRS
+    RoundToIntegerTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.lrintf128
+    libc.src.__support.FPUtil.fenv_impl
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   llrint_test
   SUITE
@@ -576,6 +642,21 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  llrintf128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    llrintf128_test.cpp
+  HDRS
+    RoundToIntegerTest.h
+  DEPENDS
+    libc.include.math
+    libc.src.math.llrintf128
+    libc.src.__support.FPUtil.fenv_impl
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   expf_test
   SUITE

diff --git a/libc/test/src/math/smoke/llrintf128_test.cpp b/libc/test/src/math/smoke/llrintf128_test.cpp
@@ -0,0 +1,14 @@
+//===-- Unittests for llrintf128 ------------------------------------------===//
+//
+// 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 "RoundToIntegerTest.h"
+
+#include "src/math/llrintf128.h"
+
+LIST_ROUND_TO_INTEGER_TESTS_WITH_MODES(float128, long long,
+                                       LIBC_NAMESPACE::llrintf128)
diff --git a/libc/test/src/math/smoke/llroundf128_test.cpp b/libc/test/src/math/smoke/llroundf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for llroundf128 -----------------------------------------===//
+//
+// 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 "RoundToIntegerTest.h"
+
+#include "src/math/llroundf128.h"
+
+LIST_ROUND_TO_INTEGER_TESTS(float128, long long, LIBC_NAMESPACE::llroundf128)
diff --git a/libc/test/src/math/smoke/lrintf128_test.cpp b/libc/test/src/math/smoke/lrintf128_test.cpp
@@ -0,0 +1,14 @@
+//===-- Unittests for lrintf128 -------------------------------------------===//
+//
+// 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 "RoundToIntegerTest.h"
+
+#include "src/math/lrintf128.h"
+
+LIST_ROUND_TO_INTEGER_TESTS_WITH_MODES(float128, long,
+                                       LIBC_NAMESPACE::lrintf128)
diff --git a/libc/test/src/math/smoke/lroundf128_test.cpp b/libc/test/src/math/smoke/lroundf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for lroundf128 ------------------------------------------===//
+//
+// 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 "RoundToIntegerTest.h"
+
+#include "src/math/lroundf128.h"
+
+LIST_ROUND_TO_INTEGER_TESTS(float128, long, LIBC_NAMESPACE::lroundf128)
diff --git a/libc/test/src/math/smoke/rintf128_test.cpp b/libc/test/src/math/smoke/rintf128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for rintf128 --------------------------------------------===//
+//
+// 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 "RIntTest.h"
+
+#include "src/math/rintf128.h"
+
+LIST_RINT_TESTS(float128, LIBC_NAMESPACE::rintf128)