[libc][math][c++23] Add {frexp,ilogb,ldexp,llogb,logb}bf16 math functions by krishna2803 · Pull Request #154427 · llvm/llvm-project

krishna2803 · 2025-08-19T21:44:17Z

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

frexpbf16
ilobbf16
ldexpbf16
llogbbf16
logbbf16

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

…ions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

…igbf16 math functions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

…nctions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

llvmbot · 2025-08-19T21:44:48Z

@llvm/pr-subscribers-libc

@llvm/pr-subscribers-backend-amdgpu

Author: Krishna Pandey (krishna2803)

Changes

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

frexpbf16
ilobbf16
ldexpbf16
llogbbf16
logbbf16

Patch is 36.49 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/154427.diff

33 Files Affected:

(modified) libc/config/baremetal/aarch64/entrypoints.txt (+5)
(modified) libc/config/baremetal/arm/entrypoints.txt (+5)
(modified) libc/config/baremetal/riscv/entrypoints.txt (+5)
(modified) libc/config/darwin/aarch64/entrypoints.txt (+5)
(modified) libc/config/darwin/x86_64/entrypoints.txt (+5)
(modified) libc/config/gpu/amdgpu/entrypoints.txt (+5)
(modified) libc/config/gpu/nvptx/entrypoints.txt (+5)
(modified) libc/config/linux/aarch64/entrypoints.txt (+5)
(modified) libc/config/linux/arm/entrypoints.txt (+5)
(modified) libc/config/linux/riscv/entrypoints.txt (+5)
(modified) libc/config/linux/x86_64/entrypoints.txt (+5)
(modified) libc/config/windows/entrypoints.txt (+5)
(modified) libc/docs/headers/math/index.rst (+5-5)
(modified) libc/src/__support/FPUtil/bfloat16.h (+2)
(modified) libc/src/math/CMakeLists.txt (+5)
(added) libc/src/math/frexpbf16.h (+21)
(modified) libc/src/math/generic/CMakeLists.txt (+70)
(added) libc/src/math/generic/frexpbf16.cpp (+21)
(added) libc/src/math/generic/ilogbbf16.cpp (+21)
(added) libc/src/math/generic/ldexpbf16.cpp (+21)
(added) libc/src/math/generic/llogbbf16.cpp (+21)
(added) libc/src/math/generic/logbbf16.cpp (+19)
(added) libc/src/math/ilogbbf16.h (+21)
(added) libc/src/math/ldexpbf16.h (+21)
(added) libc/src/math/llogbbf16.h (+21)
(added) libc/src/math/logbbf16.h (+21)
(modified) libc/test/src/math/smoke/CMakeLists.txt (+76)
(modified) libc/test/src/math/smoke/LdExpTest.h (+4-3)
(added) libc/test/src/math/smoke/frexpbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/ilogbbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/ldexpbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/llogbbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/logbbf16_test.cpp (+14)

diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index c4ec03fc146e8..10d5b3a591d0d 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -785,9 +785,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index d9e173a71e47a..785b84163701f 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -788,9 +788,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 9b0cf14037fae..2038f3e4952cf 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -788,9 +788,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 2a634852a2ed0..707e8b1d43658 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -618,9 +618,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/darwin/x86_64/entrypoints.txt b/libc/config/darwin/x86_64/entrypoints.txt
index 6a18d557f86fb..db3b305d376b0 100644
--- a/libc/config/darwin/x86_64/entrypoints.txt
+++ b/libc/config/darwin/x86_64/entrypoints.txt
@@ -261,9 +261,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/gpu/amdgpu/entrypoints.txt b/libc/config/gpu/amdgpu/entrypoints.txt
index 008f7c7bd642c..76bda91f3b229 100644
--- a/libc/config/gpu/amdgpu/entrypoints.txt
+++ b/libc/config/gpu/amdgpu/entrypoints.txt
@@ -644,9 +644,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/gpu/nvptx/entrypoints.txt b/libc/config/gpu/nvptx/entrypoints.txt
index ae434117eb8e2..cae9d593b056d 100644
--- a/libc/config/gpu/nvptx/entrypoints.txt
+++ b/libc/config/gpu/nvptx/entrypoints.txt
@@ -645,9 +645,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 88438247643f6..18853de2c13c1 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -872,9 +872,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 865392a918624..150e34a1fb195 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -488,9 +488,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 207608c431a9b..937ec4253299a 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -891,9 +891,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 44f5f2d03db0a..23871c406d236 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -923,9 +923,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index 32a6a578aae13..cc7c655280213 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -334,9 +334,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/docs/headers/math/index.rst b/libc/docs/headers/math/index.rst
index 9efbce06920b5..5049ab65d00af 100644
--- a/libc/docs/headers/math/index.rst
+++ b/libc/docs/headers/math/index.rst
@@ -179,7 +179,7 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | fmul             | N/A              | |check|         | |check|                | N/A                  | |check|\*              | N/A                    | 7.12.14.3              | F.10.11                    |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| frexp            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.7               | F.10.3.7                   |
+| frexp            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.7               | F.10.3.7                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | fromfp           | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.9.10              | F.10.6.10                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
@@ -189,21 +189,21 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | getpayload       | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | F.10.13.1              | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| ilogb            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.8               | F.10.3.8                   |
+| ilogb            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.8               | F.10.3.8                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | iscanonical      | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.3.2               | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | issignaling      | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.3.8               | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| ldexp            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.9               | F.10.3.9                   |
+| ldexp            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.9               | F.10.3.9                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| llogb            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.10              | F.10.3.10                  |
+| llogb            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.10              | F.10.3.10                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | llrint           | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.5               | F.10.6.5                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | llround          | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.7               | F.10.6.7                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| logb             | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.17              | F.10.3.17                  |
+| logb             | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.17              | F.10.3.17                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | lrint            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.5               | F.10.6.5                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
diff --git a/libc/src/__support/FPUtil/bfloat16.h b/libc/src/__support/FPUtil/bfloat16.h
index 3fab2b80317de..89d06a06f2dcf 100644
--- a/libc/src/__support/FPUtil/bfloat16.h
+++ b/libc/src/__support/FPUtil/bfloat16.h
@@ -48,6 +48,8 @@ struct BFloat16 {
           xd(sign, 0, value);
       bits = xd.template as<bfloat16, /*ShouldSignalExceptions=*/true>().bits;
 
+    } else if constexpr (cpp::is_convertible_v<T, BFloat16>) {
+      bits = value.operator BFloat16().bits;
     } else {
       bits = fputil::cast<bfloat16>(static_cast<float>(value)).bits;
     }
diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index 87a341bb6267b..b1d76c6008cf5 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -306,6 +306,7 @@ add_math_entrypoint_object(frexpf)
 add_math_entrypoint_object(frexpl)
 add_math_entrypoint_object(frexpf16)
 add_math_entrypoint_object(frexpf128)
+add_math_entrypoint_object(frexpbf16)
 
 add_math_entrypoint_object(fromfp)
 add_math_entrypoint_object(fromfpf)
@@ -341,6 +342,7 @@ add_math_entrypoint_object(ilogbf)
 add_math_entrypoint_object(ilogbl)
 add_math_entrypoint_object(ilogbf16)
 add_math_entrypoint_object(ilogbf128)
+add_math_entrypoint_object(ilogbbf16)
 
 add_math_entrypoint_object(isnan)
 add_math_entrypoint_object(isnanf)
@@ -357,12 +359,14 @@ add_math_entrypoint_object(llogbf)
 add_math_entrypoint_object(llogbl)
 add_math_entrypoint_object(llogbf16)
 add_math_entrypoint_object(llogbf128)
+add_math_entrypoint_object(llogbbf16)
 
 add_math_entrypoint_object(ldexp)
 add_math_entrypoint_object(ldexpf)
 add_math_entrypoint_object(ldexpl)
 add_math_entrypoint_object(ldexpf16)
 add_math_entrypoint_object(ldexpf128)
+add_math_entrypoint_object(ldexpbf16)
 
 add_math_entrypoint_object(log10)
 add_math_entrypoint_object(log10f)
@@ -384,6 +388,7 @@ add_math_entrypoint_object(logbf)
 add_math_entrypoint_object(logbl)
 add_math_entrypoint_object(logbf16)
 add_math_entrypoint_object(logbf128)
+add_math_entrypoint_object(logbbf16)
 
 add_math_entrypoint_object(llrint)
 add_math_entrypoint_object(llrintf)
diff --git a/libc/src/math/frexpbf16.h b/libc/src/math/frexpbf16.h
new file mode 100644
index 0000000000000..1e9bba16ea6c4
--- /dev/null
+++ b/libc/src/math/frexpbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for frexpbf16 ---------------------*- 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_FREXPFB16_H
+#define LLVM_LIBC_SRC_MATH_FREXPFB16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 frexpbf16(bfloat16 x, int *exp);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_FREXPFB16_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index e34e3f04ed8bd..3dbc54a819722 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -1732,6 +1732,20 @@ add_entrypoint_object(
     libc.src.__support.math.frexpf128
 )
 
+add_entrypoint_object(
+  frexpbf16
+  SRCS
+    frexpbf16.cpp
+  HDRS
+    ../frexpbf16.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(
   ilogb
   SRCS
@@ -1784,6 +1798,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  ilogbbf16
+  SRCS
+    ilogbbf16.cpp
+  HDRS
+    ../ilogbbf16.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(
   llogb
   SRCS
@@ -1836,6 +1864,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  llogbbf16
+  SRCS
+    llogbbf16.cpp
+  HDRS
+    ../llogbbf16.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(
   ldexp
   SRCS
@@ -1886,6 +1928,20 @@ add_entrypoint_object(
     libc.src.__support.math.ldexpf128
 )
 
+add_entrypoint_object(
+  ldexpbf16
+  SRCS
+    ldexpbf16.cpp
+  HDRS
+    ../ldexpbf16.h
+  DE...
[truncated]

llvmbot · 2025-08-19T21:44:49Z

@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:

frexpbf16
ilobbf16
ldexpbf16
llogbbf16
logbbf16

Patch is 36.49 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/154427.diff

33 Files Affected:

(modified) libc/config/baremetal/aarch64/entrypoints.txt (+5)
(modified) libc/config/baremetal/arm/entrypoints.txt (+5)
(modified) libc/config/baremetal/riscv/entrypoints.txt (+5)
(modified) libc/config/darwin/aarch64/entrypoints.txt (+5)
(modified) libc/config/darwin/x86_64/entrypoints.txt (+5)
(modified) libc/config/gpu/amdgpu/entrypoints.txt (+5)
(modified) libc/config/gpu/nvptx/entrypoints.txt (+5)
(modified) libc/config/linux/aarch64/entrypoints.txt (+5)
(modified) libc/config/linux/arm/entrypoints.txt (+5)
(modified) libc/config/linux/riscv/entrypoints.txt (+5)
(modified) libc/config/linux/x86_64/entrypoints.txt (+5)
(modified) libc/config/windows/entrypoints.txt (+5)
(modified) libc/docs/headers/math/index.rst (+5-5)
(modified) libc/src/__support/FPUtil/bfloat16.h (+2)
(modified) libc/src/math/CMakeLists.txt (+5)
(added) libc/src/math/frexpbf16.h (+21)
(modified) libc/src/math/generic/CMakeLists.txt (+70)
(added) libc/src/math/generic/frexpbf16.cpp (+21)
(added) libc/src/math/generic/ilogbbf16.cpp (+21)
(added) libc/src/math/generic/ldexpbf16.cpp (+21)
(added) libc/src/math/generic/llogbbf16.cpp (+21)
(added) libc/src/math/generic/logbbf16.cpp (+19)
(added) libc/src/math/ilogbbf16.h (+21)
(added) libc/src/math/ldexpbf16.h (+21)
(added) libc/src/math/llogbbf16.h (+21)
(added) libc/src/math/logbbf16.h (+21)
(modified) libc/test/src/math/smoke/CMakeLists.txt (+76)
(modified) libc/test/src/math/smoke/LdExpTest.h (+4-3)
(added) libc/test/src/math/smoke/frexpbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/ilogbbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/ldexpbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/llogbbf16_test.cpp (+14)
(added) libc/test/src/math/smoke/logbbf16_test.cpp (+14)

diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index c4ec03fc146e8..10d5b3a591d0d 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -785,9 +785,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index d9e173a71e47a..785b84163701f 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -788,9 +788,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 9b0cf14037fae..2038f3e4952cf 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -788,9 +788,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 2a634852a2ed0..707e8b1d43658 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -618,9 +618,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/darwin/x86_64/entrypoints.txt b/libc/config/darwin/x86_64/entrypoints.txt
index 6a18d557f86fb..db3b305d376b0 100644
--- a/libc/config/darwin/x86_64/entrypoints.txt
+++ b/libc/config/darwin/x86_64/entrypoints.txt
@@ -261,9 +261,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/gpu/amdgpu/entrypoints.txt b/libc/config/gpu/amdgpu/entrypoints.txt
index 008f7c7bd642c..76bda91f3b229 100644
--- a/libc/config/gpu/amdgpu/entrypoints.txt
+++ b/libc/config/gpu/amdgpu/entrypoints.txt
@@ -644,9 +644,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/gpu/nvptx/entrypoints.txt b/libc/config/gpu/nvptx/entrypoints.txt
index ae434117eb8e2..cae9d593b056d 100644
--- a/libc/config/gpu/nvptx/entrypoints.txt
+++ b/libc/config/gpu/nvptx/entrypoints.txt
@@ -645,9 +645,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 88438247643f6..18853de2c13c1 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -872,9 +872,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 865392a918624..150e34a1fb195 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -488,9 +488,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 207608c431a9b..937ec4253299a 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -891,9 +891,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 44f5f2d03db0a..23871c406d236 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -923,9 +923,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index 32a6a578aae13..cc7c655280213 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -334,9 +334,14 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.fminimum_magbf16
   libc.src.math.fminimum_mag_numbf16
   libc.src.math.fminimum_numbf16
+  libc.src.math.frexpbf16
   libc.src.math.fromfpbf16
   libc.src.math.fromfpxbf16
   libc.src.math.getpayloadbf16
+  libc.src.math.ilogbbf16
+  libc.src.math.ldexpbf16
+  libc.src.math.llogbbf16
+  libc.src.math.logbbf16
   libc.src.math.nanbf16
   libc.src.math.nextafterbf16
   libc.src.math.nextdownbf16
diff --git a/libc/docs/headers/math/index.rst b/libc/docs/headers/math/index.rst
index 9efbce06920b5..5049ab65d00af 100644
--- a/libc/docs/headers/math/index.rst
+++ b/libc/docs/headers/math/index.rst
@@ -179,7 +179,7 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | fmul             | N/A              | |check|         | |check|                | N/A                  | |check|\*              | N/A                    | 7.12.14.3              | F.10.11                    |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| frexp            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.7               | F.10.3.7                   |
+| frexp            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.7               | F.10.3.7                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | fromfp           | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.9.10              | F.10.6.10                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
@@ -189,21 +189,21 @@ Basic Operations
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | getpayload       | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | F.10.13.1              | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| ilogb            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.8               | F.10.3.8                   |
+| ilogb            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.8               | F.10.3.8                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | iscanonical      | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.3.2               | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | issignaling      | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.3.8               | N/A                        |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| ldexp            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.9               | F.10.3.9                   |
+| ldexp            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.9               | F.10.3.9                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| llogb            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.10              | F.10.3.10                  |
+| llogb            | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.10              | F.10.3.10                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | llrint           | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.5               | F.10.6.5                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | llround          | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.7               | F.10.6.7                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
-| logb             | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.6.17              | F.10.3.17                  |
+| logb             | |check|          | |check|         | |check|                | |check|              | |check|                | |check|                | 7.12.6.17              | F.10.3.17                  |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
 | lrint            | |check|          | |check|         | |check|                | |check|              | |check|                |                        | 7.12.9.5               | F.10.6.5                   |
 +------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+------------------------+----------------------------+
diff --git a/libc/src/__support/FPUtil/bfloat16.h b/libc/src/__support/FPUtil/bfloat16.h
index 3fab2b80317de..89d06a06f2dcf 100644
--- a/libc/src/__support/FPUtil/bfloat16.h
+++ b/libc/src/__support/FPUtil/bfloat16.h
@@ -48,6 +48,8 @@ struct BFloat16 {
           xd(sign, 0, value);
       bits = xd.template as<bfloat16, /*ShouldSignalExceptions=*/true>().bits;
 
+    } else if constexpr (cpp::is_convertible_v<T, BFloat16>) {
+      bits = value.operator BFloat16().bits;
     } else {
       bits = fputil::cast<bfloat16>(static_cast<float>(value)).bits;
     }
diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index 87a341bb6267b..b1d76c6008cf5 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -306,6 +306,7 @@ add_math_entrypoint_object(frexpf)
 add_math_entrypoint_object(frexpl)
 add_math_entrypoint_object(frexpf16)
 add_math_entrypoint_object(frexpf128)
+add_math_entrypoint_object(frexpbf16)
 
 add_math_entrypoint_object(fromfp)
 add_math_entrypoint_object(fromfpf)
@@ -341,6 +342,7 @@ add_math_entrypoint_object(ilogbf)
 add_math_entrypoint_object(ilogbl)
 add_math_entrypoint_object(ilogbf16)
 add_math_entrypoint_object(ilogbf128)
+add_math_entrypoint_object(ilogbbf16)
 
 add_math_entrypoint_object(isnan)
 add_math_entrypoint_object(isnanf)
@@ -357,12 +359,14 @@ add_math_entrypoint_object(llogbf)
 add_math_entrypoint_object(llogbl)
 add_math_entrypoint_object(llogbf16)
 add_math_entrypoint_object(llogbf128)
+add_math_entrypoint_object(llogbbf16)
 
 add_math_entrypoint_object(ldexp)
 add_math_entrypoint_object(ldexpf)
 add_math_entrypoint_object(ldexpl)
 add_math_entrypoint_object(ldexpf16)
 add_math_entrypoint_object(ldexpf128)
+add_math_entrypoint_object(ldexpbf16)
 
 add_math_entrypoint_object(log10)
 add_math_entrypoint_object(log10f)
@@ -384,6 +388,7 @@ add_math_entrypoint_object(logbf)
 add_math_entrypoint_object(logbl)
 add_math_entrypoint_object(logbf16)
 add_math_entrypoint_object(logbf128)
+add_math_entrypoint_object(logbbf16)
 
 add_math_entrypoint_object(llrint)
 add_math_entrypoint_object(llrintf)
diff --git a/libc/src/math/frexpbf16.h b/libc/src/math/frexpbf16.h
new file mode 100644
index 0000000000000..1e9bba16ea6c4
--- /dev/null
+++ b/libc/src/math/frexpbf16.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for frexpbf16 ---------------------*- 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_FREXPFB16_H
+#define LLVM_LIBC_SRC_MATH_FREXPFB16_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+bfloat16 frexpbf16(bfloat16 x, int *exp);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_FREXPFB16_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index e34e3f04ed8bd..3dbc54a819722 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -1732,6 +1732,20 @@ add_entrypoint_object(
     libc.src.__support.math.frexpf128
 )
 
+add_entrypoint_object(
+  frexpbf16
+  SRCS
+    frexpbf16.cpp
+  HDRS
+    ../frexpbf16.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(
   ilogb
   SRCS
@@ -1784,6 +1798,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  ilogbbf16
+  SRCS
+    ilogbbf16.cpp
+  HDRS
+    ../ilogbbf16.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(
   llogb
   SRCS
@@ -1836,6 +1864,20 @@ add_entrypoint_object(
     libc.src.__support.FPUtil.manipulation_functions
 )
 
+add_entrypoint_object(
+  llogbbf16
+  SRCS
+    llogbbf16.cpp
+  HDRS
+    ../llogbbf16.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(
   ldexp
   SRCS
@@ -1886,6 +1928,20 @@ add_entrypoint_object(
     libc.src.__support.math.ldexpf128
 )
 
+add_entrypoint_object(
+  ldexpbf16
+  SRCS
+    ldexpbf16.cpp
+  HDRS
+    ../ldexpbf16.h
+  DE...
[truncated]

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

krishna2803 added 22 commits August 17, 2025 05:03

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

b58785d

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

0a2b527

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update entrypoints

baaf0e0

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update docs

733f4f1

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

4a80312

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

446e637

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update entrypoints

a98b928

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

12f1923

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

6f8d84d

…ions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

c8f4380

…igbf16 math functions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

8ea9354

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update entrypoints

fc2b6eb

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

70e4463

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

feat: implement nanbf16 math function

ea9625e

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: add smoke tests for nanbf16 math function

ae0e616

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update entrypoints

27364c5

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

docs: add nanbf16

250cfea

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

832bbc6

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

a08faab

…nctions Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

chore: update entrypoints

5fb2a5c

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

fix: infinite recursion and tests

5f0ab92

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

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

49dc65d

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

krishna2803 requested review from lntue and overmighty August 19, 2025 21:44

llvmbot added backend:AMDGPU backend:RISC-V libc labels Aug 19, 2025

fix: add cpp::min in LdExpTest.h

2bf7920

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

Base automatically changed from users/krishna2803/nanbf16 to main August 23, 2025 09:15

lntue reviewed Aug 24, 2025

View reviewed changes

Comment thread libc/src/__support/FPUtil/BasicOperations.h Outdated

krishna2803 added 3 commits August 24, 2025 20:07

merge: branch 'main' into users/krishna2803/frexpbf16

92cdc99

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

refactor: remove redundant if-else

3c062b9

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

merge: branch 'main' into users/krishna2803/frexpbf16

dc0e3d7

Signed-off-by: Krishna Pandey <kpandey81930@gmail.com>

overmighty approved these changes Aug 24, 2025

View reviewed changes

lntue approved these changes Aug 25, 2025

View reviewed changes

krishna2803 merged commit c11acac into main Aug 25, 2025
20 checks passed

krishna2803 deleted the users/krishna2803/frexpbf16 branch August 25, 2025 06:16

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[libc][math][c++23] Add {frexp,ilogb,ldexp,llogb,logb}bf16 math functions - #154427

[libc][math][c++23] Add {frexp,ilogb,ldexp,llogb,logb}bf16 math functions#154427
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