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[libc][complex] Implement different flavors of the conj function (#118671)
Refer section 7.3.9.4 of ISO/IEC 9899:2023
1 parent 2c0b8b1 commit 78c2b6d

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-6
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‎libc/config/linux/aarch64/entrypoints.txt‎

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@@ -365,6 +365,9 @@ set(TARGET_LIBM_ENTRYPOINTS
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libc.src.complex.cimag
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libc.src.complex.cimagf
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libc.src.complex.cimagl
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libc.src.complex.conj
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libc.src.complex.conjf
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libc.src.complex.conjl
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# fenv.h entrypoints
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libc.src.fenv.feclearexcept
@@ -616,6 +619,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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# complex.h C23 _Complex _Float16 entrypoints
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# libc.src.complex.crealf16
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# libc.src.complex.cimagf16
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# libc.src.complex.conjf16
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# math.h C23 _Float16 entrypoints
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libc.src.math.canonicalizef16
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# complex.h C23 _Complex _Float128 entrypoints
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libc.src.complex.crealf128
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libc.src.complex.cimagf128
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libc.src.complex.conjf128
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# math.h C23 _Float128 entrypoints
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libc.src.math.canonicalizef128

‎libc/config/linux/arm/entrypoints.txt‎

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libc.src.complex.cimag
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libc.src.complex.cimagf
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libc.src.complex.cimagl
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libc.src.complex.conj
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libc.src.complex.conjf
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libc.src.complex.conjl
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# fenv.h entrypoints
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libc.src.fenv.feclearexcept

‎libc/config/linux/riscv/entrypoints.txt‎

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@@ -363,6 +363,9 @@ set(TARGET_LIBM_ENTRYPOINTS
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libc.src.complex.cimag
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libc.src.complex.cimagf
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libc.src.complex.cimagl
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libc.src.complex.conj
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libc.src.complex.conjf
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libc.src.complex.conjl
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# fenv.h entrypoints
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libc.src.fenv.feclearexcept
@@ -618,6 +621,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
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# complex.h C23 _Complex _Float128 entrypoints
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libc.src.complex.crealf128
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libc.src.complex.cimagf128
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libc.src.complex.conjf128
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# math.h C23 _Float128 entrypoints
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libc.src.math.canonicalizef128

‎libc/config/linux/x86_64/entrypoints.txt‎

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@@ -365,6 +365,9 @@ set(TARGET_LIBM_ENTRYPOINTS
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libc.src.complex.cimag
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libc.src.complex.cimagf
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libc.src.complex.cimagl
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libc.src.complex.conj
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libc.src.complex.conjf
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libc.src.complex.conjl
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# fenv.h entrypoints
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libc.src.fenv.feclearexcept
@@ -621,6 +624,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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# complex.h C23 _Complex _Float16 entrypoints
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libc.src.complex.crealf16
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libc.src.complex.cimagf16
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libc.src.complex.conjf16
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# math.h C23 _Float16 entrypoints
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libc.src.math.canonicalizef16
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# complex.h C23 _Complex _Float128 entrypoints
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# libc.src.complex.crealf128
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# libc.src.complex.cimagf128
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# libc.src.complex.conjf128
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# math.h C23 _Float128 entrypoints
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libc.src.math.canonicalizef128

‎libc/docs/headers/complex.rst‎

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@@ -57,7 +57,7 @@ Functions
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+-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| cimag | |check| | |check| | |check| | |check| | |check| | 7.3.9.2 | N/A |
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+-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| conj | | | | | | 7.3.9.4 | N/A |
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| conj | |check| | |check| | |check| | |check| | |check| | 7.3.9.4 | N/A |
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+-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| cproj | | | | | | 7.3.9.5 | N/A |
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+-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+

‎libc/src/__support/complex_type.h‎

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#define LLVM_LIBC_SRC___SUPPORT_COMPLEX_TYPE_H
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#include "src/__support/macros/config.h"
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#include "src/__support/macros/properties/complex_types.h"
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#include "src/__support/macros/properties/types.h"
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namespace LIBC_NAMESPACE_DECL {
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template <typename T> struct Complex {
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T real;
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T imag;
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};
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template <typename T> struct make_complex;
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template <> struct make_complex<float> {
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using type = _Complex float;
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};
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template <> struct make_complex<double> {
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using type = _Complex double;
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};
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template <> struct make_complex<long double> {
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using type = _Complex long double;
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};
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#if defined(LIBC_TYPES_HAS_CFLOAT16)
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template <> struct make_complex<float16> {
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using type = cfloat16;
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};
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#endif
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#if defined(LIBC_TYPES_HAS_CFLOAT128)
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template <> struct make_complex<float128> {
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using type = cfloat128;
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};
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#endif
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template <typename T> using make_complex_t = typename make_complex<T>::type;
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template <typename T> struct make_real;
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template <> struct make_real<_Complex float> {
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using type = float;
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};
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template <> struct make_real<_Complex double> {
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using type = double;
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};
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template <> struct make_real<_Complex long double> {
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using type = long double;
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};
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#if defined(LIBC_TYPES_HAS_CFLOAT16)
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template <> struct make_real<cfloat16> {
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using type = float16;
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};
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#endif
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#if defined(LIBC_TYPES_HAS_CFLOAT128)
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template <> struct make_real<cfloat128> {
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using type = float128;
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};
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#endif
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template <typename T> using make_real_t = typename make_real<T>::type;
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template <typename T> LIBC_INLINE constexpr T conjugate(T c) {
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Complex<make_real_t<T>> c_c = cpp::bit_cast<Complex<make_real_t<T>>>(c);
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c_c.imag = -c_c.imag;
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return cpp::bit_cast<T>(c_c);
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}
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} // namespace LIBC_NAMESPACE_DECL
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#endif // LLVM_LIBC_SRC___SUPPORT_COMPLEX_TYPE_H

‎libc/src/complex/CMakeLists.txt‎

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@@ -24,3 +24,9 @@ add_complex_entrypoint_object(cimagf)
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add_complex_entrypoint_object(cimagl)
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add_complex_entrypoint_object(cimagf16)
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add_complex_entrypoint_object(cimagf128)
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add_complex_entrypoint_object(conj)
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add_complex_entrypoint_object(conjf)
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add_complex_entrypoint_object(conjl)
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add_complex_entrypoint_object(conjf16)
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add_complex_entrypoint_object(conjf128)

‎libc/src/complex/conj.h‎

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//===-- Implementation header for conj --------------------------*- 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_COMPLEX_CONJ_H
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#define LLVM_LIBC_SRC_COMPLEX_CONJ_H
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#include "src/__support/macros/config.h"
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namespace LIBC_NAMESPACE_DECL {
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_Complex double conj(_Complex double x);
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} // namespace LIBC_NAMESPACE_DECL
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#endif // LLVM_LIBC_SRC_COMPLEX_CONJ_H

‎libc/src/complex/conjf.h‎

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//===-- Implementation header for conjf -------------------------*- 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_COMPLEX_CONJF_H
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#define LLVM_LIBC_SRC_COMPLEX_CONJF_H
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#include "src/__support/macros/config.h"
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namespace LIBC_NAMESPACE_DECL {
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_Complex float conjf(_Complex float x);
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} // namespace LIBC_NAMESPACE_DECL
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#endif // LLVM_LIBC_SRC_COMPLEX_CONJF_H

‎libc/src/complex/conjf128.h‎

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//===-- Implementation header for conjf128 ----------------------*- 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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#include "src/__support/macros/properties/complex_types.h"
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#include "src/__support/macros/properties/types.h"
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#if defined(LIBC_TYPES_HAS_CFLOAT128)
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#ifndef LLVM_LIBC_SRC_COMPLEX_CONJF128_H
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#define LLVM_LIBC_SRC_COMPLEX_CONJF128_H
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#include "src/__support/macros/config.h"
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namespace LIBC_NAMESPACE_DECL {
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cfloat128 conjf128(cfloat128 x);
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} // namespace LIBC_NAMESPACE_DECL
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#endif // LLVM_LIBC_SRC_COMPLEX_CONJF128_H
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#endif // LIBC_TYPES_HAS_CFLOAT128

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