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nickdesaulniersnickdesaulniers
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[libc] implement stdc_leading_ones (C23) (#80082)
1 parent ecb5a1b commit 6a3fde6

22 files changed

+468
-8
lines changed

‎libc/config/linux/x86_64/entrypoints.txt‎

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@@ -97,6 +97,11 @@ set(TARGET_LIBC_ENTRYPOINTS
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libc.src.stdbit.stdc_leading_zeros_ui
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libc.src.stdbit.stdc_leading_zeros_ul
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libc.src.stdbit.stdc_leading_zeros_ull
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libc.src.stdbit.stdc_leading_ones_uc
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libc.src.stdbit.stdc_leading_ones_us
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libc.src.stdbit.stdc_leading_ones_ui
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libc.src.stdbit.stdc_leading_ones_ul
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libc.src.stdbit.stdc_leading_ones_ull
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# stdlib.h entrypoints
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libc.src.stdlib.abs

‎libc/docs/stdbit.rst‎

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@@ -36,11 +36,11 @@ stdc_leading_zeros_us |check|
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stdc_leading_zeros_ui |check|
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stdc_leading_zeros_ul |check|
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stdc_leading_zeros_ull |check|
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stdc_leading_ones_uc
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stdc_leading_ones_us
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stdc_leading_ones_ui
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stdc_leading_ones_ul
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stdc_leading_ones_ull
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stdc_leading_ones_uc |check|
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stdc_leading_ones_us |check|
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stdc_leading_ones_ui |check|
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stdc_leading_ones_ul |check|
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stdc_leading_ones_ull |check|
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stdc_trailing_zeros_uc
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stdc_trailing_zeros_us
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stdc_trailing_zeros_ui
@@ -115,7 +115,7 @@ __STDC_ENDIAN_LITTLE__
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__STDC_ENDIAN_BIG__
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__STDC_ENDIAN_NATIVE__
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stdc_leading_zeros |check|
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stdc_leading_ones
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stdc_leading_ones |check|
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stdc_trailing_zeros
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stdc_trailing_ones
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stdc_first_leading_zero

‎libc/include/llvm-libc-macros/stdbit-macros.h‎

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@@ -25,6 +25,21 @@ inline unsigned long stdc_leading_zeros(unsigned long x) {
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inline unsigned long long stdc_leading_zeros(unsigned long long x) {
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return stdc_leading_zeros_ull(x);
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}
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inline unsigned char stdc_leading_ones(unsigned char x) {
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return stdc_leading_ones_uc(x);
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}
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inline unsigned short stdc_leading_ones(unsigned short x) {
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return stdc_leading_ones_us(x);
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}
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inline unsigned stdc_leading_ones(unsigned x) {
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return stdc_leading_ones_ui(x);
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}
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inline unsigned long stdc_leading_ones(unsigned long x) {
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return stdc_leading_ones_ul(x);
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}
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inline unsigned long long stdc_leading_ones(unsigned long long x) {
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return stdc_leading_ones_ull(x);
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}
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#else
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#define stdc_leading_zeros(x) \
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_Generic((x), \
@@ -33,6 +48,13 @@ inline unsigned long long stdc_leading_zeros(unsigned long long x) {
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unsigned: stdc_leading_zeros_ui, \
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unsigned long: stdc_leading_zeros_ul, \
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unsigned long long: stdc_leading_zeros_ull)(x)
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#define stdc_leading_ones(x) \
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_Generic((x), \
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unsigned char: stdc_leading_ones_uc, \
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unsigned short: stdc_leading_ones_us, \
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unsigned: stdc_leading_ones_ui, \
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unsigned long: stdc_leading_ones_ul, \
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unsigned long long: stdc_leading_ones_ull)(x)
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#endif // __cplusplus
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#endif // __LLVM_LIBC_MACROS_STDBIT_MACROS_H

‎libc/spec/stdc.td‎

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@@ -779,7 +779,12 @@ def StdC : StandardSpec<"stdc"> {
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FunctionSpec<"stdc_leading_zeros_us", RetValSpec<UnsignedShortType>, [ArgSpec<UnsignedShortType>]>,
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FunctionSpec<"stdc_leading_zeros_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
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FunctionSpec<"stdc_leading_zeros_ul", RetValSpec<UnsignedLongType>, [ArgSpec<UnsignedLongType>]>,
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FunctionSpec<"stdc_leading_zeros_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>
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FunctionSpec<"stdc_leading_zeros_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>,
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FunctionSpec<"stdc_leading_ones_uc", RetValSpec<UnsignedCharType>, [ArgSpec<UnsignedCharType>]>,
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FunctionSpec<"stdc_leading_ones_us", RetValSpec<UnsignedShortType>, [ArgSpec<UnsignedShortType>]>,
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FunctionSpec<"stdc_leading_ones_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
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FunctionSpec<"stdc_leading_ones_ul", RetValSpec<UnsignedLongType>, [ArgSpec<UnsignedLongType>]>,
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FunctionSpec<"stdc_leading_ones_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>
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] // Functions
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>;
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‎libc/src/stdbit/CMakeLists.txt‎

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@@ -47,3 +47,53 @@ add_entrypoint_object(
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DEPENDS
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libc.src.__support.CPP.bit
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)
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add_entrypoint_object(
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stdc_leading_ones_uc
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SRCS
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stdc_leading_ones_uc.cpp
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HDRS
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stdc_leading_ones_uc.h
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DEPENDS
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libc.src.__support.CPP.bit
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)
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add_entrypoint_object(
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stdc_leading_ones_us
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SRCS
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stdc_leading_ones_us.cpp
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HDRS
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stdc_leading_ones_us.h
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DEPENDS
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libc.src.__support.CPP.bit
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)
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add_entrypoint_object(
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stdc_leading_ones_ui
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SRCS
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stdc_leading_ones_ui.cpp
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HDRS
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stdc_leading_ones_ui.h
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DEPENDS
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libc.src.__support.CPP.bit
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)
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add_entrypoint_object(
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stdc_leading_ones_ul
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SRCS
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stdc_leading_ones_ul.cpp
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HDRS
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stdc_leading_ones_ul.h
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DEPENDS
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libc.src.__support.CPP.bit
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)
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add_entrypoint_object(
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stdc_leading_ones_ull
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SRCS
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stdc_leading_ones_ull.cpp
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HDRS
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stdc_leading_ones_ull.h
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DEPENDS
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libc.src.__support.CPP.bit
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)

‎libc/src/stdbit/stdc_leading_ones_uc.cpp‎

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//===-- Implementation of stdc_leading_ones_uc ----------------------------===//
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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/stdbit/stdc_leading_ones_uc.h"
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#include "src/__support/CPP/bit.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(unsigned char, stdc_leading_ones_uc, (unsigned char value)) {
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return static_cast<unsigned char>(cpp::countl_one(value));
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}
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} // namespace LIBC_NAMESPACE

‎libc/src/stdbit/stdc_leading_ones_uc.h‎

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//===-- Implementation header for stdc_leading_ones_uc ----------*- 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_STDBIT_STDC_LEADING_ONES_UC_H
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#define LLVM_LIBC_SRC_STDBIT_STDC_LEADING_ONES_UC_H
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namespace LIBC_NAMESPACE {
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unsigned char stdc_leading_ones_uc(unsigned char value);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_STDBIT_STDC_LEADING_ONES_UC_H

‎libc/src/stdbit/stdc_leading_ones_ui.cpp‎

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//===-- Implementation of stdc_leading_ones_ui ----------------------------===//
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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/stdbit/stdc_leading_ones_ui.h"
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#include "src/__support/CPP/bit.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(unsigned, stdc_leading_ones_ui, (unsigned value)) {
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return static_cast<unsigned>(cpp::countl_one(value));
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}
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} // namespace LIBC_NAMESPACE

‎libc/src/stdbit/stdc_leading_ones_ui.h‎

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//===-- Implementation header for stdc_leading_ones_ui ----------*- 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_STDBIT_STDC_LEADING_ONES_UI_H
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#define LLVM_LIBC_SRC_STDBIT_STDC_LEADING_ONES_UI_H
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namespace LIBC_NAMESPACE {
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unsigned stdc_leading_ones_ui(unsigned value);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_STDBIT_STDC_LEADING_ONES_UI_H

‎libc/src/stdbit/stdc_leading_ones_ul.cpp‎

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//===-- Implementation of stdc_leading_ones_ul ----------------------------===//
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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/stdbit/stdc_leading_ones_ul.h"
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#include "src/__support/CPP/bit.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(unsigned long, stdc_leading_ones_ul, (unsigned long value)) {
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return static_cast<unsigned long>(cpp::countl_one(value));
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}
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} // namespace LIBC_NAMESPACE

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