Skip to content

Conversation

krishna2803
Copy link
Contributor

This PR adds the following basic math functions for BFloat16 type along with the tests:

  • nextafterbf16
  • nextdownbf16
  • nexttowardbf16
  • nextupbf16

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
@llvmbot
Copy link
Member

llvmbot commented Aug 17, 2025

@llvm/pr-subscribers-libc
@llvm/pr-subscribers-backend-amdgpu

@llvm/pr-subscribers-backend-risc-v

Author: Krishna Pandey (krishna2803)

Changes

This PR adds the following basic math functions for BFloat16 type along with the tests:

  • nextafterbf16
  • nextdownbf16
  • nexttowardbf16
  • nextupbf16

Patch is 32.82 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/153993.diff

30 Files Affected:

  • (modified) libc/config/baremetal/aarch64/entrypoints.txt (+4)
  • (modified) libc/config/baremetal/arm/entrypoints.txt (+4)
  • (modified) libc/config/baremetal/riscv/entrypoints.txt (+4)
  • (modified) libc/config/darwin/aarch64/entrypoints.txt (+4)
  • (modified) libc/config/darwin/x86_64/entrypoints.txt (+4)
  • (modified) libc/config/gpu/amdgpu/entrypoints.txt (+4)
  • (modified) libc/config/gpu/nvptx/entrypoints.txt (+4)
  • (modified) libc/config/linux/aarch64/entrypoints.txt (+4)
  • (modified) libc/config/linux/arm/entrypoints.txt (+4)
  • (modified) libc/config/linux/riscv/entrypoints.txt (+4)
  • (modified) libc/config/linux/x86_64/entrypoints.txt (+4)
  • (modified) libc/config/windows/entrypoints.txt (+4)
  • (modified) libc/docs/headers/math/index.rst (+4-4)
  • (modified) libc/src/math/CMakeLists.txt (+4)
  • (modified) libc/src/math/generic/CMakeLists.txt (+56)
  • (added) libc/src/math/generic/nextafterbf16.cpp (+21)
  • (added) libc/src/math/generic/nextdownbf16.cpp (+21)
  • (added) libc/src/math/generic/nexttowardbf16.cpp (+22)
  • (added) libc/src/math/generic/nextupbf16.cpp (+21)
  • (added) libc/src/math/nextafterbf16.h (+21)
  • (added) libc/src/math/nextdownbf16.h (+21)
  • (added) libc/src/math/nexttowardbf16.h (+21)
  • (added) libc/src/math/nextupbf16.h (+21)
  • (modified) libc/test/src/math/smoke/CMakeLists.txt (+52)
  • (modified) libc/test/src/math/smoke/NextAfterTest.h (+23-20)
  • (modified) libc/test/src/math/smoke/NextTowardTest.h (+2-2)
  • (added) libc/test/src/math/smoke/nextafterbf16_test.cpp (+14)
  • (added) libc/test/src/math/smoke/nextdownbf16_test.cpp (+14)
  • (added) libc/test/src/math/smoke/nexttowardbf16_test.cpp (+14)
  • (added) libc/test/src/math/smoke/nextupbf16_test.cpp (+14)
diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index c2710429b3cfd..26ee82d99192f 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -787,6 +787,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 6e5389d542f80..00025d324fc2c 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -790,6 +790,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 76da24d2cc876..c0ab0cf903c41 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -790,6 +790,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 5bfd6c863fabb..cd81756770ed4 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -620,6 +620,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/darwin/x86_64/entrypoints.txt b/libc/config/darwin/x86_64/entrypoints.txt
index 27d214d06cd0b..3aa54e027a42d 100644
--- a/libc/config/darwin/x86_64/entrypoints.txt
+++ b/libc/config/darwin/x86_64/entrypoints.txt
@@ -263,6 +263,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/gpu/amdgpu/entrypoints.txt b/libc/config/gpu/amdgpu/entrypoints.txt
index bc75956738e5a..3b42c0fd71547 100644
--- a/libc/config/gpu/amdgpu/entrypoints.txt
+++ b/libc/config/gpu/amdgpu/entrypoints.txt
@@ -646,6 +646,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/gpu/nvptx/entrypoints.txt b/libc/config/gpu/nvptx/entrypoints.txt
index c9688284df16c..b569327409849 100644
--- a/libc/config/gpu/nvptx/entrypoints.txt
+++ b/libc/config/gpu/nvptx/entrypoints.txt
@@ -647,6 +647,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index e42bbb14ec119..4058e7155f34a 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -874,6 +874,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 60fc953c2b9f4..9002bd12d6733 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -490,6 +490,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 1a03683d72e61..77d5bae188a3c 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -893,6 +893,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 9b4946b883626..b811fe79c174d 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -925,6 +925,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index b97e893567038..ec2fde253e898 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -336,6 +336,10 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_numbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
+  libc.src.math.nextafterbf16
+  libc.src.math.nextdownbf16
+  libc.src.math.nexttowardbf16
+  libc.src.math.nextupbf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.truncbf16
diff --git a/libc/docs/headers/math/index.rst b/libc/docs/headers/math/index.rst
index 754c1a55cf449..591295659c3d4 100644
--- a/libc/docs/headers/math/index.rst
+++ b/libc/docs/headers/math/index.rst
@@ -215,13 +215,13 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | nearbyint        | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.3               | F.10.6.3                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| nextafter        | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.11.3              | F.10.8.3                   |
+| nextafter        | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.11.3              | F.10.8.3                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| nextdown         | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.11.6              | F.10.8.6                   |
+| nextdown         | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.11.6              | F.10.8.6                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| nexttoward       | |check|          | |check|         | |check|                | |check|              | N/A                    |                        | 7.12.11.4              | F.10.8.4                   |
+| nexttoward       | |check|          | |check|         | |check|                | |check|              | N/A                    | |check|                | 7.12.11.4              | F.10.8.4                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| nextup           | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.11.5              | F.10.8.5                   |
+| nextup           | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.11.5              | F.10.8.5                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | remainder        | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.10.2              | F.10.7.2                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index f94120272ce66..3843247c4fa5b 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -431,23 +431,27 @@ add_math_entrypoint_object(nextafterf)
 add_math_entrypoint_object(nextafterl)
 add_math_entrypoint_object(nextafterf16)
 add_math_entrypoint_object(nextafterf128)
+add_math_entrypoint_object(nextafterbf16)
 
 add_math_entrypoint_object(nexttoward)
 add_math_entrypoint_object(nexttowardf)
 add_math_entrypoint_object(nexttowardl)
 add_math_entrypoint_object(nexttowardf16)
+add_math_entrypoint_object(nexttowardbf16)
 
 add_math_entrypoint_object(nextdown)
 add_math_entrypoint_object(nextdownf)
 add_math_entrypoint_object(nextdownl)
 add_math_entrypoint_object(nextdownf16)
 add_math_entrypoint_object(nextdownf128)
+add_math_entrypoint_object(nextdownbf16)
 
 add_math_entrypoint_object(nextup)
 add_math_entrypoint_object(nextupf)
 add_math_entrypoint_object(nextupl)
 add_math_entrypoint_object(nextupf16)
 add_math_entrypoint_object(nextupf128)
+add_math_entrypoint_object(nextupbf16)
 
 add_math_entrypoint_object(pow)
 add_math_entrypoint_object(powf)
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 1608bed87cb6b..822da74d7597e 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -3496,6 +3496,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  nextafterbf16
+  SRCS
+    nextafterbf16.cpp
+  HDRS
+    ../nextafterbf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.manipulation_functions
+    libc.src.__support.macros.config
+    libc.src.__support.macros.properties.types
+)
+
 add_entrypoint_object(
   nexttoward
   SRCS
@@ -3537,6 +3551,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  nexttowardbf16
+  SRCS
+    nexttowardbf16.cpp
+  HDRS
+    ../nexttowardbf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.manipulation_functions
+    libc.src.__support.macros.config
+    libc.src.__support.macros.properties.types
+)
+
 add_entrypoint_object(
   nextdown
   SRCS
@@ -3589,6 +3617,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  nextdownbf16
+  SRCS
+    nextdownbf16.cpp
+  HDRS
+    ../nextdownbf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.manipulation_functions
+    libc.src.__support.macros.config
+    libc.src.__support.macros.properties.types
+)
+
 add_entrypoint_object(
   nextup
   SRCS
@@ -3641,6 +3683,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  nextupbf16
+  SRCS
+    nextupbf16.cpp
+  HDRS
+    ../nextupbf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.manipulation_functions
+    libc.src.__support.macros.config
+    libc.src.__support.macros.properties.types
+)
+
 add_entrypoint_object(
   fmod
   SRCS
diff --git a/libc/src/math/generic/nextafterbf16.cpp b/libc/src/math/generic/nextafterbf16.cpp
new file mode 100644
index 0000000000000..e21a2dcb3d664
--- /dev/null
+++ b/libc/src/math/generic/nextafterbf16.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of nextafterbf16 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/nextafterbf16.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(bfloat16, nextafterbf16, (bfloat16 x, bfloat16 y)) {
+  return fputil::nextafter(x, y);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/nextdownbf16.cpp b/libc/src/math/generic/nextdownbf16.cpp
new file mode 100644
index 0000000000000..2115df95ff072
--- /dev/null
+++ b/libc/src/math/generic/nextdownbf16.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of nextdownbf16 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/nextdownbf16.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(bfloat16, nextdownbf16, (bfloat16 x)) {
+  return fputil::nextupdown</*IsDown=*/true>(x);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/nexttowardbf16.cpp b/libc/src/math/generic/nexttowardbf16.cpp
new file mode 100644
index 0000000000000..3deab87575939
--- /dev/null
+++ b/libc/src/math/generic/nexttowardbf16.cpp
@@ -0,0 +1,22 @@
+//===-- Implementation of nexttowardbf16 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/nexttowardbf16.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(bfloat16, nexttowardbf16, (bfloat16 x, long double y)) {
+  // nextafter<T, U> where T != U is nexttoward
+  return fputil::nextafter(x, y);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/nextupbf16.cpp b/libc/src/math/generic/nextupbf16.cpp
new file mode 100644
index 0000000000000..147ce37477d9f
--- /dev/null
+++ b/libc/src/math/generic/nextupbf16.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of nextupbf16 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/nextupbf16.h"
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(bfloat16, nextupbf16, (bfloat16 x)) {
+  return fputil::nextupdown</*IsDown=*/false>(x);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/nextafterbf16.h b/libc/src/math/nextafterbf16.h
new file mode 100644
index 0000000000000..f962c7c51e5cd
--- /dev/null
+++ b/libc/src/math/nextafterbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for nextafterbf16 -----------------*- 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_NEXTAFTERBF16_H
+#define LLVM_LIBC_SRC_MATH_NEXTAFTERBF16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 nextafterbf16(bfloat16 x, bfloat16 y);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_NEXTAFTERBF16_H
diff --git a/libc/src/math/nextdownbf16.h b/libc/src/math/nextdownbf16.h
new file mode 100644
index 0000000000000..36b0cd7cb9626
--- /dev/null
+++ b/libc/src/math/nextdownbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for nextdownbf16 ------------------*- 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_NEXTDOWNBF16_H
+#define LLVM_LIBC_SRC_MATH_NEXTDOWNBF16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 nextdownbf16(bfloat16 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_NEXTDOWNBF16_H
diff --git a/libc/src/math/nexttowardbf16.h b/libc/src/math/nexttowardbf16.h
new file mode 100644
index 0000000000000..930abf858ef51
--- /dev/null
+++ b/libc/src/math/nexttowardbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for nexttowardbf16 ----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.tx...
[truncated]

@overmighty overmighty requested review from overmighty and lntue August 18, 2025 21:14
Base automatically changed from users/krishna2803/fromfpbf16 to main August 19, 2025 16:49
Copy link

github-actions bot commented Aug 19, 2025

✅ With the latest revision this PR passed the C/C++ code formatter.

@krishna2803 krishna2803 force-pushed the users/krishna2803/nextfnbf16 branch from 66e5f1d to 6092968 Compare August 19, 2025 20:17
Comment on lines 254 to 255
EXPECT_FP_EQ_WITH_EXCEPTION(T(63.0), func(T(63.25), FP_INT_TOWARDZERO, 8U),
FE_INEXACT);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Duplicate of the test case above.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

You removed the wrong test case in your latest commit.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

ah sorry about that. should be correct now as of the latest commit.

krishna2803 and others added 4 commits August 20, 2025 22:58
Co-authored-by: OverMighty <its.overmighty@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>
@krishna2803 krishna2803 merged commit eac19d4 into main Aug 22, 2025
20 checks passed
@krishna2803 krishna2803 deleted the users/krishna2803/nextfnbf16 branch August 22, 2025 16:31
rupprecht added a commit to rupprecht/llvm-project that referenced this pull request Aug 22, 2025
rupprecht added a commit that referenced this pull request Aug 22, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Development

Successfully merging this pull request may close these issues.

4 participants