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[libc][math][c23] Add f16subl C23 math function
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‎libc/config/linux/x86_64/entrypoints.txt

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@@ -547,6 +547,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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libc.src.math.f16sqrtf
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libc.src.math.f16sub
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libc.src.math.f16subf
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libc.src.math.f16subl
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libc.src.math.fabsf16
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libc.src.math.fdimf16
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libc.src.math.floorf16

‎libc/docs/math/index.rst

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@@ -130,7 +130,7 @@ Basic Operations
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| f16fma | |check| | |check| | |check| | N/A | |check| | 7.12.14.5 | F.10.11 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| f16sub | |check| | |check| | | N/A | |check| | 7.12.14.2 | F.10.11 |
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| f16sub | |check| | |check| | |check| | N/A | |check| | 7.12.14.2 | F.10.11 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| fabs | |check| | |check| | |check| | |check| | |check| | 7.12.7.3 | F.10.4.3 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+

‎libc/spec/stdc.td

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@@ -736,6 +736,7 @@ def StdC : StandardSpec<"stdc"> {
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GuardedFunctionSpec<"f16sub", RetValSpec<Float16Type>, [ArgSpec<DoubleType>, ArgSpec<DoubleType>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"f16subf", RetValSpec<Float16Type>, [ArgSpec<FloatType>, ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"f16subl", RetValSpec<Float16Type>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoubleType>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"f16subf128", RetValSpec<Float16Type>, [ArgSpec<Float128Type>, ArgSpec<Float128Type>], "LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128">,
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GuardedFunctionSpec<"f16divf", RetValSpec<Float16Type>, [ArgSpec<FloatType>, ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,

‎libc/src/math/CMakeLists.txt

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@@ -115,6 +115,7 @@ add_math_entrypoint_object(f16sqrtf)
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add_math_entrypoint_object(f16sub)
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add_math_entrypoint_object(f16subf)
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add_math_entrypoint_object(f16subl)
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add_math_entrypoint_object(f16subf128)
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add_math_entrypoint_object(fabs)

‎libc/src/math/f16subl.h

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//===-- Implementation header for f16subl -----------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_SRC_MATH_F16SUBL_H
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#define LLVM_LIBC_SRC_MATH_F16SUBL_H
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#include "src/__support/macros/properties/types.h"
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namespace LIBC_NAMESPACE {
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float16 f16subl(long double x, long double y);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_MATH_F16SUBL_H

‎libc/src/math/generic/CMakeLists.txt

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@@ -3854,6 +3854,19 @@ add_entrypoint_object(
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-O3
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)
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add_entrypoint_object(
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f16subl
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SRCS
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f16subl.cpp
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HDRS
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../f16subl.h
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DEPENDS
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libc.src.__support.macros.properties.types
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libc.src.__support.FPUtil.generic.add_sub
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COMPILE_OPTIONS
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-O3
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)
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add_entrypoint_object(
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f16subf128
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SRCS

‎libc/src/math/generic/f16subl.cpp

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//===-- Implementation of f16subl function --------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/math/f16subl.h"
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#include "src/__support/FPUtil/generic/add_sub.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(float16, f16subl, (long double x, long double y)) {
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return fputil::generic::sub<float16>(x, y);
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}
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} // namespace LIBC_NAMESPACE

‎libc/test/src/math/CMakeLists.txt

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@@ -1967,6 +1967,19 @@ add_fp_unittest(
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libc.src.math.f16subf
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)
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add_fp_unittest(
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f16subl_test
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NEED_MPFR
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SUITE
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libc-math-unittests
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SRCS
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f16subl_test.cpp
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HDRS
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SubTest.h
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DEPENDS
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libc.src.math.f16subl
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)
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add_fp_unittest(
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f16divf_test
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NEED_MPFR

‎libc/test/src/math/f16subl_test.cpp

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//===-- Unittests for f16subl ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "SubTest.h"
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#include "src/math/f16subl.h"
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LIST_SUB_TESTS(float16, long double, LIBC_NAMESPACE::f16subl)

‎libc/test/src/math/smoke/CMakeLists.txt

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@@ -3718,6 +3718,20 @@ add_fp_unittest(
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libc.src.math.f16subf
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)
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add_fp_unittest(
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f16subl_test
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SUITE
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libc-math-smoke-tests
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SRCS
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f16subl_test.cpp
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HDRS
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SubTest.h
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DEPENDS
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libc.hdr.fenv_macros
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libc.src.__support.FPUtil.basic_operations
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libc.src.math.f16subl
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)
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add_fp_unittest(
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f16subf128_test
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SUITE

‎libc/test/src/math/smoke/f16subl_test.cpp

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//===-- Unittests for f16subl ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "SubTest.h"
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#include "src/math/f16subl.h"
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LIST_SUB_TESTS(float16, long double, LIBC_NAMESPACE::f16subl)

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