diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 33ecff813a1fb..d30f01bb51c48 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -574,6 +574,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
     libc.src.math.nextafterf128
     libc.src.math.nextdownf128
     libc.src.math.nextupf128
+    libc.src.math.remquof128
     libc.src.math.rintf128
     libc.src.math.roundf128
     libc.src.math.scalbnf128
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 1beca7e826870..77854d09b410e 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -605,6 +605,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
     libc.src.math.nextafterf128
     libc.src.math.nextdownf128
     libc.src.math.nextupf128
+    libc.src.math.remquof128
     libc.src.math.rintf128
     libc.src.math.roundevenf128
     libc.src.math.roundf128
diff --git a/libc/docs/math/index.rst b/libc/docs/math/index.rst
index 24b88a52f049d..61d737abbcfbc 100644
--- a/libc/docs/math/index.rst
+++ b/libc/docs/math/index.rst
@@ -200,7 +200,7 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
 | remainder        | |check|          | |check|         | |check|                |                      |                        | 7.12.10.2              | F.10.7.2                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
-| remquo           | |check|          | |check|         | |check|                |                      |                        | 7.12.10.3              | F.10.7.3                   |
+| remquo           | |check|          | |check|         | |check|                |                      | |check|                | 7.12.10.3              | F.10.7.3                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
 | rint             | |check|          | |check|         | |check|                | |check|              | |check|                | 7.12.9.4               | F.10.6.4                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td
index 64439144833d4..d707f15246cb4 100644
--- a/libc/spec/stdc.td
+++ b/libc/spec/stdc.td
@@ -578,6 +578,7 @@ def StdC : StandardSpec<"stdc"> {
           FunctionSpec<"remainderl", RetValSpec<LongDoubleType>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoubleType>]>,
 
           FunctionSpec<"remquof", RetValSpec<FloatType>, [ArgSpec<FloatType>, ArgSpec<FloatType>, ArgSpec<IntPtr>]>,
+          GuardedFunctionSpec<"remquof128", RetValSpec<Float128Type>, [ArgSpec<Float128Type>, ArgSpec<Float128Type>, ArgSpec<IntPtr>], "LIBC_TYPES_HAS_FLOAT128">,
           FunctionSpec<"remquo", RetValSpec<DoubleType>, [ArgSpec<DoubleType>, ArgSpec<DoubleType>, ArgSpec<IntPtr>]>,
           FunctionSpec<"remquol", RetValSpec<LongDoubleType>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoubleType>, ArgSpec<IntPtr>]>,
 
diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index 141f66817e53e..70ecb526d5a33 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -310,6 +310,7 @@ add_math_entrypoint_object(remainderl)
 
 add_math_entrypoint_object(remquo)
 add_math_entrypoint_object(remquof)
+add_math_entrypoint_object(remquof128)
 add_math_entrypoint_object(remquol)
 
 add_math_entrypoint_object(rint)
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 9c9073c0ea7bf..bd1c5d4f48ba7 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -2416,6 +2416,18 @@ add_entrypoint_object(
     -O2
 )
 
+add_entrypoint_object(
+  remquof128
+  SRCS
+    remquof128.cpp
+  HDRS
+    ../remquof128.h
+  DEPENDS
+    libc.src.__support.FPUtil.division_and_remainder_operations
+  COMPILE_OPTIONS
+    -O3
+)
+
 add_entrypoint_object(
   remquo
   SRCS
diff --git a/libc/src/math/generic/remquof128.cpp b/libc/src/math/generic/remquof128.cpp
new file mode 100644
index 0000000000000..e195c7b51b5ff
--- /dev/null
+++ b/libc/src/math/generic/remquof128.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of remquof128 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/remquof128.h"
+#include "src/__support/FPUtil/DivisionAndRemainderOperations.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float128, remquof128, (float128 x, float128 y, int *exp)) {
+  return fputil::remquo(x, y, *exp);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/remquof128.h b/libc/src/math/remquof128.h
new file mode 100644
index 0000000000000..e9db1ef5c5b51
--- /dev/null
+++ b/libc/src/math/remquof128.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for remquof128 --------------------*- 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_REMQUOF128_H
+#define LLVM_LIBC_SRC_MATH_REMQUOF128_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+float128 remquof128(float128 x, float128 y, int *exp);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_REMQUOF128_H
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
index 07e8b5dddfa6c..401196dbc74c9 100644
--- a/libc/test/src/math/smoke/CMakeLists.txt
+++ b/libc/test/src/math/smoke/CMakeLists.txt
@@ -2514,6 +2514,20 @@ add_fp_unittest(
     libc.src.__support.FPUtil.fp_bits
 )
 
+add_fp_unittest(
+  remquof128_test
+  SUITE
+    libc-math-smoke-tests
+  SRCS
+    remquof128_test.cpp
+  HDRS
+    RemQuoTest.h
+  DEPENDS
+    libc.src.math.remquof128
+    libc.src.__support.FPUtil.basic_operations
+    libc.src.__support.FPUtil.fp_bits
+)
+
 add_fp_unittest(
   remquo_test
   SUITE
diff --git a/libc/test/src/math/smoke/remquof128_test.cpp b/libc/test/src/math/smoke/remquof128_test.cpp
new file mode 100644
index 0000000000000..8ef6c3b31cef2
--- /dev/null
+++ b/libc/test/src/math/smoke/remquof128_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for remquof128 ------------------------------------------===//
+//
+// 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 "RemQuoTest.h"
+
+#include "src/math/remquof128.h"
+
+LIST_REMQUO_TESTS(float128, LIBC_NAMESPACE::remquof128)