[llvm-branch-commits] [libc] [llvm] [libc] Make `fdimf128` use the emulated float128 type (PR #217567)

via llvm-branch-commits llvm-branch-commits at lists.llvm.org
Thu Aug 20 03:01:15 PDT 2026


llvmorg-github-actions[bot] wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Zorojuro (Sukumarsawant)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/217567.diff


25 Files Affected:

- (modified) libc/config/baremetal/aarch64/entrypoints.txt (+1-1) 
- (modified) libc/config/baremetal/arm/entrypoints.txt (+1-1) 
- (modified) libc/config/baremetal/riscv/entrypoints.txt (+1-1) 
- (modified) libc/config/darwin/aarch64/entrypoints.txt (+1-1) 
- (modified) libc/config/darwin/x86_64/entrypoints.txt (+1) 
- (modified) libc/config/freebsd/x86_64/entrypoints.txt (+1-1) 
- (modified) libc/config/gpu/amdgpu/entrypoints.txt (+1) 
- (modified) libc/config/gpu/nvptx/entrypoints.txt (+1) 
- (modified) libc/config/linux/aarch64/entrypoints.txt (+1-1) 
- (modified) libc/config/linux/arm/entrypoints.txt (+1) 
- (modified) libc/config/linux/riscv/entrypoints.txt (+1-1) 
- (modified) libc/config/linux/x86_64/entrypoints.txt (+1-1) 
- (modified) libc/config/windows/entrypoints.txt (+1) 
- (modified) libc/shared/math/fdimf128.h (-6) 
- (modified) libc/src/__support/math/CMakeLists.txt (+1-1) 
- (modified) libc/src/__support/math/fdimf128.h (+4-7) 
- (modified) libc/src/math/fdimf128.h (+5) 
- (modified) libc/src/math/generic/CMakeLists.txt (+1) 
- (modified) libc/src/math/generic/fdimf128.cpp (+5-1) 
- (modified) libc/test/shared/shared_math_constexpr_test.cpp (+2-2) 
- (modified) libc/test/shared/shared_math_test.cpp (+2-2) 
- (modified) libc/test/src/math/smoke/CMakeLists.txt (+1) 
- (modified) libc/test/src/math/smoke/fdimf128_test.cpp (+5) 
- (modified) utils/bazel/llvm-project-overlay/libc/BUILD.bazel (+3-1) 
- (modified) utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel (+3) 


``````````diff
diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index e461324171058..c4dd3dcac1eec 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -408,6 +408,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -758,7 +759,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 810d2bb277752..283ffbbb330ff 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -420,6 +420,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -769,7 +770,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 579838fa5e659..4fc769a9c40d5 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -416,6 +416,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -766,7 +767,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     # libc.src.math.fmodf128
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 3dbc4010431b1..96efac733c1bb 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -227,6 +227,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -578,7 +579,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/darwin/x86_64/entrypoints.txt b/libc/config/darwin/x86_64/entrypoints.txt
index da5c8d91cb732..ff29edf14c74b 100644
--- a/libc/config/darwin/x86_64/entrypoints.txt
+++ b/libc/config/darwin/x86_64/entrypoints.txt
@@ -143,6 +143,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     #libc.src.math.fabsl
     #libc.src.math.fdim
     #libc.src.math.fdimf
+    #libc.src.math.fdimf128
     #libc.src.math.fdiml
     #libc.src.math.fdiv
     #libc.src.math.fdivl
diff --git a/libc/config/freebsd/x86_64/entrypoints.txt b/libc/config/freebsd/x86_64/entrypoints.txt
index 2cc7463626d39..799af1ccb4f0b 100644
--- a/libc/config/freebsd/x86_64/entrypoints.txt
+++ b/libc/config/freebsd/x86_64/entrypoints.txt
@@ -162,6 +162,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.faddl
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -517,7 +518,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/gpu/amdgpu/entrypoints.txt b/libc/config/gpu/amdgpu/entrypoints.txt
index bbb113009216d..a727eaa4b6b89 100644
--- a/libc/config/gpu/amdgpu/entrypoints.txt
+++ b/libc/config/gpu/amdgpu/entrypoints.txt
@@ -355,6 +355,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.faddl
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
diff --git a/libc/config/gpu/nvptx/entrypoints.txt b/libc/config/gpu/nvptx/entrypoints.txt
index 6cd2b61b9b70a..952e6e961839c 100644
--- a/libc/config/gpu/nvptx/entrypoints.txt
+++ b/libc/config/gpu/nvptx/entrypoints.txt
@@ -351,6 +351,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.faddl
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 7a169dcedb766..e274e87036078 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -571,6 +571,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.floor
     libc.src.math.floorf
@@ -911,7 +912,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 9be34aec16856..c3306022a3c67 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -395,6 +395,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 92f7eaf70c8d4..feeecd3311e61 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -635,6 +635,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -996,7 +997,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 4e25a228ebce6..5658e67002907 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -645,6 +645,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.fadd
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
@@ -1006,7 +1007,6 @@ if(LIBC_TYPES_HAS_NATIVE_FLOAT128)
     libc.src.math.dsqrtf128
     libc.src.math.dsubf128
     libc.src.math.faddf128
-    libc.src.math.fdimf128
     libc.src.math.fdivf128
     libc.src.math.ffmaf128
     libc.src.math.fmodf128
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index 5dc5dc8ed27a9..56399adecc082 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -194,6 +194,7 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.faddl
     libc.src.math.fdim
     libc.src.math.fdimf
+    libc.src.math.fdimf128
     libc.src.math.fdiml
     libc.src.math.fdiv
     libc.src.math.fdivl
diff --git a/libc/shared/math/fdimf128.h b/libc/shared/math/fdimf128.h
index 0cac3ce9a67ae..16437f3bc0067 100644
--- a/libc/shared/math/fdimf128.h
+++ b/libc/shared/math/fdimf128.h
@@ -9,10 +9,6 @@
 #ifndef LLVM_LIBC_SHARED_MATH_FDIMF128_H
 #define LLVM_LIBC_SHARED_MATH_FDIMF128_H
 
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
 #include "shared/libc_common.h"
 #include "src/__support/math/fdimf128.h"
 
@@ -24,6 +20,4 @@ using math::fdimf128;
 } // namespace shared
 } // namespace LIBC_NAMESPACE_DECL
 
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
 #endif // LLVM_LIBC_SHARED_MATH_FDIMF128_H
diff --git a/libc/src/__support/math/CMakeLists.txt b/libc/src/__support/math/CMakeLists.txt
index 618f29510bb7c..415a75c1ace22 100644
--- a/libc/src/__support/math/CMakeLists.txt
+++ b/libc/src/__support/math/CMakeLists.txt
@@ -3436,7 +3436,7 @@ add_header_library(
   HDRS
     fdimf128.h
   DEPENDS
-    libc.include.llvm-libc-types.float128
+    libc.src.__support.FPUtil.float128
     libc.src.__support.FPUtil.basic_operations
     libc.src.__support.macros.config
 )
diff --git a/libc/src/__support/math/fdimf128.h b/libc/src/__support/math/fdimf128.h
index 0f73f1c0561ee..63b3913fb7afb 100644
--- a/libc/src/__support/math/fdimf128.h
+++ b/libc/src/__support/math/fdimf128.h
@@ -9,23 +9,20 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_MATH_FDIMF128_H
 #define LLVM_LIBC_SRC___SUPPORT_MATH_FDIMF128_H
 
-#include "include/llvm-libc-types/float128.h"
-
-#ifdef LIBC_TYPES_HAS_NATIVE_FLOAT128
-
 #include "src/__support/FPUtil/BasicOperations.h"
+#include "src/__support/FPUtil/float128.h"
 #include "src/__support/macros/config.h"
 
 namespace LIBC_NAMESPACE_DECL {
 namespace math {
 
-LIBC_INLINE constexpr float128 fdimf128(float128 x, float128 y) {
+using LIBC_NAMESPACE::fputil::Float128;
+
+LIBC_INLINE constexpr Float128 fdimf128(Float128 x, Float128 y) {
   return fputil::fdim(x, y);
 }
 
 } // namespace math
 } // namespace LIBC_NAMESPACE_DECL
 
-#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
-
 #endif // LLVM_LIBC_SRC___SUPPORT_MATH_FDIMF128_H
diff --git a/libc/src/math/fdimf128.h b/libc/src/math/fdimf128.h
index a5e1387042b71..ead7fbc02162d 100644
--- a/libc/src/math/fdimf128.h
+++ b/libc/src/math/fdimf128.h
@@ -9,11 +9,16 @@
 #ifndef LLVM_LIBC_SRC_MATH_FDIMF128_H
 #define LLVM_LIBC_SRC_MATH_FDIMF128_H
 
+#include "src/__support/FPUtil/float128.h"
 #include "src/__support/macros/config.h"
 #include "src/__support/macros/properties/types.h"
 
 namespace LIBC_NAMESPACE_DECL {
 
+#ifndef LIBC_TYPES_HAS_NATIVE_FLOAT128
+using float128 = LIBC_NAMESPACE::fputil::Float128;
+#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
+
 float128 fdimf128(float128 x, float128 y);
 
 } // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 2dcf252b28e99..e63aac676e95d 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -2926,6 +2926,7 @@ add_entrypoint_object(
   HDRS
     ../fdimf128.h
   DEPENDS
+    libc.src.__support.CPP.bit
     libc.src.__support.math.fdimf128
 )
 
diff --git a/libc/src/math/generic/fdimf128.cpp b/libc/src/math/generic/fdimf128.cpp
index de705aa03a2a5..385d683eba01b 100644
--- a/libc/src/math/generic/fdimf128.cpp
+++ b/libc/src/math/generic/fdimf128.cpp
@@ -7,12 +7,16 @@
 //===----------------------------------------------------------------------===//
 
 #include "src/math/fdimf128.h"
+#include "src/__support/CPP/bit.h"
 #include "src/__support/math/fdimf128.h"
 
 namespace LIBC_NAMESPACE_DECL {
 
+using LIBC_NAMESPACE::fputil::Float128;
+
 LLVM_LIBC_FUNCTION(float128, fdimf128, (float128 x, float128 y)) {
-  return math::fdimf128(x, y);
+  return cpp::bit_cast<float128>(
+      math::fdimf128(cpp::bit_cast<Float128>(x), cpp::bit_cast<Float128>(y)));
 }
 
 } // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/test/shared/shared_math_constexpr_test.cpp b/libc/test/shared/shared_math_constexpr_test.cpp
index ffa8c895628c4..bc3b719561e4e 100644
--- a/libc/test/shared/shared_math_constexpr_test.cpp
+++ b/libc/test/shared/shared_math_constexpr_test.cpp
@@ -386,6 +386,8 @@ static_assert(Float128(0.0) ==
                                                    Float128(0.0)));
 static_assert(Float128(1.0) ==
               LIBC_NAMESPACE::shared::fabsf128(Float128(-1.0)));
+static_assert(Float128(1.0) ==
+              LIBC_NAMESPACE::shared::fdimf128(Float128(1.0), Float128(0.0)));
 static_assert(Float128(0.0) ==
               LIBC_NAMESPACE::shared::floorf128(Float128(0.0)));
 static_assert(Float128(0.0) ==
@@ -440,8 +442,6 @@ static_assert(0.0 ==
               LIBC_NAMESPACE::shared::dmulf128(float128(0.0), float128(1.0)));
 static_assert(0.0f ==
               LIBC_NAMESPACE::shared::faddf128(float128(0.0), float128(0.0)));
-static_assert(float128(1.0) ==
-              LIBC_NAMESPACE::shared::fdimf128(float128(1.0), float128(0.0)));
 static_assert(0.0f ==
               LIBC_NAMESPACE::shared::fdivf128(float128(0.0), float128(1.0)));
 static_assert(0.0 == LIBC_NAMESPACE::shared::dsqrtf128(float128(0.0)));
diff --git a/libc/test/shared/shared_math_test.cpp b/libc/test/shared/shared_math_test.cpp
index 1349ee3db3ad3..62297bf1cfec4 100644
--- a/libc/test/shared/shared_math_test.cpp
+++ b/libc/test/shared/shared_math_test.cpp
@@ -587,6 +587,8 @@ TEST(LlvmLibcSharedMathTest, AllEmuFloat128) {
   EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::copysignf128(
                                   Float128(0.0), Float128(0.0)));
   EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::fabsf128(Float128(0.0)));
+  EXPECT_FP_EQ(Float128(0.0),
+               LIBC_NAMESPACE::shared::fdimf128(Float128(0.0), Float128(0.0)));
   EXPECT_FP_EQ(Float128(0.0), LIBC_NAMESPACE::shared::floorf128(Float128(0.0)));
   EXPECT_FP_EQ(Float128(0.0),
                LIBC_NAMESPACE::shared::fmaxf128(Float128(0.0), Float128(0.0)));
@@ -668,8 +670,6 @@ TEST(LlvmLibcSharedMathTest, AllFloat128) {
                LIBC_NAMESPACE::shared::dsubf128(float128(0.0), float128(0.0)));
   EXPECT_FP_EQ(float128(0.0),
                LIBC_NAMESPACE::shared::faddf128(float128(0.0), float128(0.0)));
-  EXPECT_FP_EQ(float128(0.0),
-               LIBC_NAMESPACE::shared::fdimf128(float128(0.0), float128(0.0)));
   EXPECT_FP_EQ(1.0f,
                LIBC_NAMESPACE::shared::fdivf128(float128(1.0), float128(1.0)));
 
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
index 56aa077eee562..6839727c42270 100644
--- a/libc/test/src/math/smoke/CMakeLists.txt
+++ b/libc/test/src/math/smoke/CMakeLists.txt
@@ -2628,6 +2628,7 @@ add_fp_unittest(
   HDRS
     FDimTest.h
   DEPENDS
+    libc.src.__support.FPUtil.float128
     libc.src.math.fdimf128
     libc.src.__support.CPP.algorithm
     libc.src.__support.FPUtil.fp_bits
diff --git a/libc/test/src/math/smoke/fdimf128_test.cpp b/libc/test/src/math/smoke/fdimf128_test.cpp
index 8e65c2b4a1ec5..65ecff18a8cc6 100644
--- a/libc/test/src/math/smoke/fdimf128_test.cpp
+++ b/libc/test/src/math/smoke/fdimf128_test.cpp
@@ -7,7 +7,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "FDimTest.h"
+#include "src/__support/FPUtil/float128.h"
 
 #include "src/math/fdimf128.h"
 
+#ifndef LIBC_TYPES_HAS_NATIVE_FLOAT128
+using float128 = LIBC_NAMESPACE::fputil::Float128;
+#endif // LIBC_TYPES_HAS_NATIVE_FLOAT128
+
 LIST_FDIM_TESTS(float128, LIBC_NAMESPACE::fdimf128);
diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
index f5098f1dc765d..35d7bf94bb028 100644
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -7792,8 +7792,8 @@ libc_support_library(
     hdrs = ["src/__support/math/fdimf128.h"],
     deps = [
         ":__support_fputil_basic_operations",
+        ":__support_fputil_float128",
         ":__support_macros_config",
-        ":llvm_libc_types_float128",
     ],
 )
 
@@ -11643,6 +11643,8 @@ libc_math_function(
 libc_math_function(
     name = "fdimf128",
     additional_deps = [
+        ":__support_cpp_bit",
+        ":__support_fputil_float128",
         ":__support_math_fdimf128",
     ],
 )
diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
index cd0c201520812..02efcaeac23c1 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
@@ -440,6 +440,9 @@ math_test(
 math_test(
     name = "fdimf128",
     hdrs = ["FDimTest.h"],
+    deps = [
+        "//libc:__support_fputil_float128",
+    ],
 )
 
 math_test(

``````````

</details>


https://github.com/llvm/llvm-project/pull/217567


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