[libc][math][c++23] Add {modf,remainder,remquo}bf16 math functions #154652

krishna2803 · 2025-08-21T00:14:38Z

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

modfbf16
remainderbf16
remquobf16

Signed-off-by: Krishna Pandey <[email protected]>

…ions Signed-off-by: Krishna Pandey <[email protected]>

…igbf16 math functions Signed-off-by: Krishna Pandey <[email protected]>

Signed-off-by: Krishna Pandey <[email protected]>

…nctions Signed-off-by: Krishna Pandey <[email protected]>

Signed-off-by: Krishna Pandey <[email protected]>

…dfbf6

llvmbot · 2025-08-21T00:15:10Z

@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:

modfbf16
remainderbf16
remquobf16

Patch is 24.35 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/154652.diff

25 Files Affected:

(modified) libc/config/baremetal/aarch64/entrypoints.txt (+3)
(modified) libc/config/baremetal/arm/entrypoints.txt (+3)
(modified) libc/config/baremetal/riscv/entrypoints.txt (+3)
(modified) libc/config/darwin/aarch64/entrypoints.txt (+3)
(modified) libc/config/darwin/x86_64/entrypoints.txt (+3)
(modified) libc/config/gpu/amdgpu/entrypoints.txt (+3)
(modified) libc/config/gpu/nvptx/entrypoints.txt (+3)
(modified) libc/config/linux/aarch64/entrypoints.txt (+3)
(modified) libc/config/linux/arm/entrypoints.txt (+3)
(modified) libc/config/linux/riscv/entrypoints.txt (+3)
(modified) libc/config/linux/x86_64/entrypoints.txt (+3)
(modified) libc/config/windows/entrypoints.txt (+3)
(modified) libc/docs/headers/math/index.rst (+3-3)
(modified) libc/src/math/CMakeLists.txt (+5-1)
(modified) libc/src/math/generic/CMakeLists.txt (+44)
(added) libc/src/math/generic/modfbf16.cpp (+21)
(added) libc/src/math/generic/remainderbf16.cpp (+22)
(added) libc/src/math/generic/remquobf16.cpp (+21)
(added) libc/src/math/modfbf16.h (+21)
(added) libc/src/math/remainderbf16.h (+21)
(added) libc/src/math/remquobf16.h (+21)
(modified) libc/test/src/math/smoke/CMakeLists.txt (+30)
(modified) libc/test/src/math/smoke/ModfTest.h (+8-2)
(added) libc/test/src/math/smoke/modfbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/remquobf16_test.cpp (+14)

diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index 10d5b3a591d0d..f6f2740e52fe3 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -793,11 +793,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 785b84163701f..6f9ce31e4bb45 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -796,11 +796,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 2038f3e4952cf..ddca368e7175c 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -796,11 +796,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 707e8b1d43658..22b291ac6c2b7 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -626,11 +626,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/darwin/x86_64/entrypoints.txt b/libc/config/darwin/x86_64/entrypoints.txt
index db3b305d376b0..e69c24446403d 100644
--- a/libc/config/darwin/x86_64/entrypoints.txt
+++ b/libc/config/darwin/x86_64/entrypoints.txt
@@ -269,11 +269,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/gpu/amdgpu/entrypoints.txt b/libc/config/gpu/amdgpu/entrypoints.txt
index 76bda91f3b229..5630538547485 100644
--- a/libc/config/gpu/amdgpu/entrypoints.txt
+++ b/libc/config/gpu/amdgpu/entrypoints.txt
@@ -652,11 +652,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/gpu/nvptx/entrypoints.txt b/libc/config/gpu/nvptx/entrypoints.txt
index cae9d593b056d..c10cd8f454238 100644
--- a/libc/config/gpu/nvptx/entrypoints.txt
+++ b/libc/config/gpu/nvptx/entrypoints.txt
@@ -653,11 +653,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 18853de2c13c1..ff4b3bdcbcdad 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -880,11 +880,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 150e34a1fb195..8d81edf536b78 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -496,11 +496,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 937ec4253299a..dbe7356510e2d 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -899,11 +899,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 23871c406d236..a24af935fa6b2 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -931,11 +931,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index cc7c655280213..06868e1792dd4 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -342,11 +342,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.ldexpbf16
   libc.src.math.llogbbf16
   libc.src.math.logbbf16
+  libc.src.math.modfbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
   libc.src.math.nexttowardbf16
   libc.src.math.nextupbf16
+  libc.src.math.remainderbf16
+  libc.src.math.remquobf16
   libc.src.math.roundbf16
   libc.src.math.roundevenbf16
   libc.src.math.setpayloadbf16
diff --git a/libc/docs/headers/math/index.rst b/libc/docs/headers/math/index.rst
index 5049ab65d00af..d4326665ea851 100644
--- a/libc/docs/headers/math/index.rst
+++ b/libc/docs/headers/math/index.rst
@@ -209,7 +209,7 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | lround           | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.7               | F.10.6.7                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| modf             | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.18              | F.10.3.18                  |
+| modf             | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.18              | F.10.3.18                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | nan              | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.11.2              | F.10.8.2                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
@@ -223,9 +223,9 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | 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                   |
+| remainder        | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.10.2              | F.10.7.2                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| remquo           | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.10.3              | F.10.7.3                   |
+| remquo           | |check|          | |check|         | |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/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index b1d76c6008cf5..6cc221178df94 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -300,6 +300,7 @@ add_math_entrypoint_object(fmodf)
 add_math_entrypoint_object(fmodl)
 add_math_entrypoint_object(fmodf16)
 add_math_entrypoint_object(fmodf128)
+add_math_entrypoint_object(fmodbf16)
 
 add_math_entrypoint_object(frexp)
 add_math_entrypoint_object(frexpf)
@@ -419,6 +420,7 @@ add_math_entrypoint_object(modff)
 add_math_entrypoint_object(modfl)
 add_math_entrypoint_object(modff16)
 add_math_entrypoint_object(modff128)
+add_math_entrypoint_object(modfbf16)
 
 add_math_entrypoint_object(nan)
 add_math_entrypoint_object(nanf)
@@ -470,12 +472,14 @@ add_math_entrypoint_object(remainderf)
 add_math_entrypoint_object(remainderl)
 add_math_entrypoint_object(remainderf16)
 add_math_entrypoint_object(remainderf128)
+add_math_entrypoint_object(remainderbf16)
 
 add_math_entrypoint_object(remquo)
 add_math_entrypoint_object(remquof)
-add_math_entrypoint_object(remquof128)
 add_math_entrypoint_object(remquol)
 add_math_entrypoint_object(remquof16)
+add_math_entrypoint_object(remquof128)
+add_math_entrypoint_object(remquobf16)
 
 add_math_entrypoint_object(rint)
 add_math_entrypoint_object(rintf)
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 3dbc54a819722..dc9d101cc76c8 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -2280,6 +2280,21 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  modfbf16
+  SRCS
+    modfbf16.cpp
+  HDRS
+    ../modfbf16.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(
   fmin
   SRCS
@@ -3184,6 +3199,21 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.division_and_remainder_operations
 )
 
+add_entrypoint_object(
+  remquobf16
+  SRCS
+    remquobf16.cpp
+  HDRS
+    ../remquobf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.division_and_remainder_operations
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.config
+)
+
+
 add_entrypoint_object(
   remainderf
   SRCS
@@ -3236,6 +3266,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.division_and_remainder_operations
 )
 
+add_entrypoint_object(
+  remainderbf16
+  SRCS
+    remainderbf16.cpp
+  HDRS
+    ../remainderbf16.h
+  DEPENDS
+    libc.src.__support.common
+    libc.src.__support.FPUtil.bfloat16
+    libc.src.__support.FPUtil.division_and_remainder_operations
+    libc.src.__support.macros.properties.types
+    libc.src.__support.macros.config
+)
+
 add_entrypoint_object(
   hypotf
   SRCS
diff --git a/libc/src/math/generic/modfbf16.cpp b/libc/src/math/generic/modfbf16.cpp
new file mode 100644
index 0000000000000..09458f6a2db40
--- /dev/null
+++ b/libc/src/math/generic/modfbf16.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of modfbf16 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/modfbf16.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, modfbf16, (bfloat16 x, bfloat16 *iptr)) {
+  return fputil::modf(x, *iptr);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/remainderbf16.cpp b/libc/src/math/generic/remainderbf16.cpp
new file mode 100644
index 0000000000000..e70726a6cbc55
--- /dev/null
+++ b/libc/src/math/generic/remainderbf16.cpp
@@ -0,0 +1,22 @@
+//===-- Implementation of remainderbf16 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/remainderbf16.h"
+#include "src/__support/FPUtil/DivisionAndRemainderOperations.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, remainderbf16, (bfloat16 x, bfloat16 y)) {
+  int quotient;
+  return fputil::remquo(x, y, quotient);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/remquobf16.cpp b/libc/src/math/generic/remquobf16.cpp
new file mode 100644
index 0000000000000..e1b13f8deb19a
--- /dev/null
+++ b/libc/src/math/generic/remquobf16.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of remquobf16 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/remquobf16.h"
+#include "src/__support/FPUtil/DivisionAndRemainderOperations.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, remquobf16, (bfloat16 x, bfloat16 y, int *exp)) {
+  return fputil::remquo(x, y, *exp);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/modfbf16.h b/libc/src/math/modfbf16.h
new file mode 100644
index 0000000000000..df05b6c5b0aad
--- /dev/null
+++ b/libc/src/math/modfbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for modfbf16 ----------------------*- 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_MODFBF16_H
+#define LLVM_LIBC_SRC_MATH_MODFBF16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 modfbf16(bfloat16 x, bfloat16 *iptr);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_MODFBF16_H
diff --git a/libc/src/math/remainderbf16.h b/libc/src/math/remainderbf16.h
new file mode 100644
index 0000000000000..a1a2eaa3a0efb
--- /dev/null
+++ b/libc/src/math/remainderbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for remainderbf16 -----------------*- 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_REMAINDERBF16_H
+#define LLVM_LIBC_SRC_MATH_REMAINDERBF16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 remainderbf16(bfloat16 x, bfloat16 y);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_REMAINDERBF16_H
diff --git a/libc/src/math/remquobf16.h b/lib...
[truncated]

libc/src/math/CMakeLists.txt

libc/src/math/generic/CMakeLists.txt

Co-authored-by: OverMighty <[email protected]>

Signed-off-by: Krishna Pandey <[email protected]>

libc/config/baremetal/aarch64/entrypoints.txt

Signed-off-by: Krishna Pandey <[email protected]>

krishna2803 added 29 commits August 17, 2025 05:03

feat: implement {,u}fromfp{,x}bf16 math functions

b58785d

Signed-off-by: Krishna Pandey <[email protected]>

chore: add tests for {,u}fromfp{,x}bf16 math functions

0a2b527

Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

baaf0e0

Signed-off-by: Krishna Pandey <[email protected]>

chore: update docs

733f4f1

Signed-off-by: Krishna Pandey <[email protected]>

feat: implement next{after,down,toward,up}bf16 math functions

4a80312

Signed-off-by: Krishna Pandey <[email protected]>

chore: add smoke tests for next{after,down,toward,up}bf16 math functions

446e637

Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

a98b928

Signed-off-by: Krishna Pandey <[email protected]>

docs: add next{after,down,toward,up}bf16 math functions

12f1923

Signed-off-by: Krishna Pandey <[email protected]>

feat: implement {get,set}payloadbf16 and setpayloadsigbf16 math funct…

6f8d84d

…ions Signed-off-by: Krishna Pandey <[email protected]>

chore: implement smoke tests for {get,set}payloadbf16 and setpayloads…

c8f4380

…igbf16 math functions Signed-off-by: Krishna Pandey <[email protected]>

fix: add correct static_cast for fputil::getpload for bfloat16

8ea9354

Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

fc2b6eb

Signed-off-by: Krishna Pandey <[email protected]>

docs: add {get,set}payloadbf16 and setpayloadsigbf16 math functions

70e4463

Signed-off-by: Krishna Pandey <[email protected]>

feat: implement nanbf16 math function

ea9625e

Signed-off-by: Krishna Pandey <[email protected]>

chore: add smoke tests for nanbf16 math function

ae0e616

Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

27364c5

Signed-off-by: Krishna Pandey <[email protected]>

docs: add nanbf16

250cfea

Signed-off-by: Krishna Pandey <[email protected]>

feat: implement {frexp,ilogb,ldexp,llogb,logb}bf16 math functions

832bbc6

Signed-off-by: Krishna Pandey <[email protected]>

chore: add smoke tests for {frexp,ilogb,ldexp,llogb,logb}bf16 math fu…

a08faab

…nctions Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

5fb2a5c

Signed-off-by: Krishna Pandey <[email protected]>

fix: infinite recursion and tests

5f0ab92

Signed-off-by: Krishna Pandey <[email protected]>

docs: add {frexp,ilogb,ldexp,llogb,logb}bf16 math functions

49dc65d

Signed-off-by: Krishna Pandey <[email protected]>

feat: implement {modf,remainder,remquo}bf16 math functions

fc5e215

Signed-off-by: Krishna Pandey <[email protected]>

chore: add smoke tests for {modf,remainder,remquo}bf16 math functions

d0e8c83

Signed-off-by: Krishna Pandey <[email protected]>

chore: update entrypoints

7711efd

Signed-off-by: Krishna Pandey <[email protected]>

docs: add {modf,remainder,remquo}bf16 math functions

e52a7fa

Signed-off-by: Krishna Pandey <[email protected]>

chore: remove fmodbf16 from CMakeLists.txt

25674ef

Signed-off-by: Krishna Pandey <[email protected]>

fix: add cpp::min in LdExpTest.h

2bf7920

Signed-off-by: Krishna Pandey <[email protected]>

merge: branch 'users/krishna2803/frexpbf16' into users/krishna2803/mo…

c1f2be2

…dfbf6

llvmbot added the backend:AMDGPU label Aug 21, 2025

llvmbot added backend:RISC-V libc labels Aug 21, 2025

krishna2803 requested review from overmighty and lntue August 24, 2025 14:16

overmighty requested changes Aug 24, 2025

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libc/src/math/generic/CMakeLists.txt Outdated Show resolved Hide resolved

libc/src/math/generic/CMakeLists.txt Outdated Show resolved Hide resolved

fix: nits

5a76e02

Co-authored-by: OverMighty <[email protected]>

Base automatically changed from users/krishna2803/frexpbf16 to main August 25, 2025 06:16

krishna2803 added 3 commits August 25, 2025 15:35

merge: branch 'main' into users/krishna2803/modfbf6

7284969

Signed-off-by: Krishna Pandey <[email protected]>

merge: branch 'main' into users/krishna2803/modfbf6

916c997

Signed-off-by: Krishna Pandey <[email protected]>

fix: entrypoints.txt

9130ec2

overmighty approved these changes Aug 26, 2025

View reviewed changes

libc/config/baremetal/aarch64/entrypoints.txt Outdated Show resolved Hide resolved

nit: sort entrypoints

0de6843

Signed-off-by: Krishna Pandey <[email protected]>

overmighty approved these changes Aug 27, 2025

View reviewed changes

krishna2803 merged commit f005e2c into main Aug 27, 2025
20 checks passed

krishna2803 deleted the users/krishna2803/modfbf6 branch August 27, 2025 06:12

aemerson mentioned this pull request Aug 30, 2025

[NFC] [clangd] [Modules] remove dot in log #156207

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[libc][math][c++23] Add {modf,remainder,remquo}bf16 math functions #154652

[libc][math][c++23] Add {modf,remainder,remquo}bf16 math functions #154652

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[libc][math][c++23] Add {modf,remainder,remquo}bf16 math functions #154652

[libc][math][c++23] Add {modf,remainder,remquo}bf16 math functions #154652

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