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Michael Flanders
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[libc][stdbit][c23] adds implementation of stdc_bit_ceil functions (llvm#84657)
Closes llvm#84652. Based on llvm#84233.
1 parent 862c7e0 commit 75b0d38

23 files changed

+409
-9
lines changed

‎libc/config/linux/x86_64/entrypoints.txt‎

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@@ -158,6 +158,11 @@ set(TARGET_LIBC_ENTRYPOINTS
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libc.src.stdbit.stdc_bit_floor_ui
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libc.src.stdbit.stdc_bit_floor_ul
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libc.src.stdbit.stdc_bit_floor_ull
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libc.src.stdbit.stdc_bit_ceil_uc
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libc.src.stdbit.stdc_bit_ceil_us
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libc.src.stdbit.stdc_bit_ceil_ui
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libc.src.stdbit.stdc_bit_ceil_ul
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libc.src.stdbit.stdc_bit_ceil_ull
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# stdlib.h entrypoints
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libc.src.stdlib.abs

‎libc/docs/stdbit.rst‎

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@@ -96,11 +96,11 @@ stdc_bit_floor_us |check|
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stdc_bit_floor_ui |check|
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stdc_bit_floor_ul |check|
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stdc_bit_floor_ull |check|
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stdc_bit_ceil_uc
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stdc_bit_ceil_us
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stdc_bit_ceil_ui
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stdc_bit_ceil_ul
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stdc_bit_ceil_ull
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stdc_bit_ceil_uc |check|
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stdc_bit_ceil_us |check|
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stdc_bit_ceil_ui |check|
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stdc_bit_ceil_ul |check|
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stdc_bit_ceil_ull |check|
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============================ =========
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@@ -127,7 +127,7 @@ stdc_count_ones |check|
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stdc_has_single_bit |check|
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stdc_bit_width |check|
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stdc_bit_floor |check|
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stdc_bit_ceil
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stdc_bit_ceil |check|
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========================= =========
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Standards

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

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@@ -194,6 +194,19 @@ inline unsigned long stdc_bit_floor(unsigned long x) {
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inline unsigned long long stdc_bit_floor(unsigned long long x) {
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return stdc_bit_floor_ull(x);
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}
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inline unsigned char stdc_bit_ceil(unsigned char x) {
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return stdc_bit_ceil_uc(x);
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}
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inline unsigned short stdc_bit_ceil(unsigned short x) {
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return stdc_bit_ceil_us(x);
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}
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inline unsigned stdc_bit_ceil(unsigned x) { return stdc_bit_ceil_ui(x); }
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inline unsigned long stdc_bit_ceil(unsigned long x) {
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return stdc_bit_ceil_ul(x);
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}
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inline unsigned long long stdc_bit_ceil(unsigned long long x) {
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return stdc_bit_ceil_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), \
@@ -286,6 +299,13 @@ inline unsigned long long stdc_bit_floor(unsigned long long x) {
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unsigned: stdc_bit_floor_ui, \
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unsigned long: stdc_bit_floor_ul, \
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unsigned long long: stdc_bit_floor_ull)(x)
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#define stdc_bit_ceil(x) \
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_Generic((x), \
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unsigned char: stdc_bit_ceil_uc, \
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unsigned short: stdc_bit_ceil_us, \
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unsigned: stdc_bit_ceil_ui, \
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unsigned long: stdc_bit_ceil_ul, \
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unsigned long long: stdc_bit_ceil_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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@@ -816,7 +816,8 @@ def StdC : StandardSpec<"stdc"> {
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Macro<"stdc_count_ones">,
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Macro<"stdc_has_single_bit">,
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Macro<"std_bit_width">,
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Macro<"std_bit_floor">
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Macro<"std_bit_floor">,
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Macro<"std_bit_ceil">
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], // Macros
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[], // Types
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[], // Enumerations
@@ -880,7 +881,12 @@ def StdC : StandardSpec<"stdc"> {
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FunctionSpec<"stdc_bit_floor_us", RetValSpec<UnsignedShortType>, [ArgSpec<UnsignedShortType>]>,
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FunctionSpec<"stdc_bit_floor_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
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FunctionSpec<"stdc_bit_floor_ul", RetValSpec<UnsignedLongType>, [ArgSpec<UnsignedLongType>]>,
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FunctionSpec<"stdc_bit_floor_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>
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FunctionSpec<"stdc_bit_floor_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>,
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FunctionSpec<"stdc_bit_ceil_uc", RetValSpec<UnsignedCharType>, [ArgSpec<UnsignedCharType>]>,
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FunctionSpec<"stdc_bit_ceil_us", RetValSpec<UnsignedShortType>, [ArgSpec<UnsignedShortType>]>,
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FunctionSpec<"stdc_bit_ceil_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
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FunctionSpec<"stdc_bit_ceil_ul", RetValSpec<UnsignedLongType>, [ArgSpec<UnsignedLongType>]>,
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FunctionSpec<"stdc_bit_ceil_ull", RetValSpec<UnsignedLongLongType>, [ArgSpec<UnsignedLongLongType>]>
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] // Functions
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>;
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‎libc/src/__support/CPP/bit.h‎

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@@ -193,7 +193,7 @@ template <typename T>
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bit_ceil(T value) {
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if (value < 2)
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return 1;
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return T(1) << cpp::bit_width<T>(value - 1u);
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return static_cast<T>(T(1) << cpp::bit_width<T>(value - 1u));
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}
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// Rotate algorithms make use of "Safe, Efficient, and Portable Rotate in C/C++"

‎libc/src/stdbit/CMakeLists.txt‎

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@@ -12,6 +12,7 @@ set(prefixes
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has_single_bit
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bit_width
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bit_floor
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bit_ceil
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)
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set(suffixes c s i l ll)
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foreach(prefix IN LISTS prefixes)

‎libc/src/stdbit/stdc_bit_ceil_uc.cpp‎

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//===-- Implementation of stdc_bit_ceil_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_bit_ceil_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_bit_ceil_uc, (unsigned char value)) {
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return cpp::bit_ceil(value);
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}
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} // namespace LIBC_NAMESPACE

‎libc/src/stdbit/stdc_bit_ceil_uc.h‎

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//===-- Implementation header for stdc_bit_ceil_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_BIT_CEIL_UC_H
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#define LLVM_LIBC_SRC_STDBIT_STDC_BIT_CEIL_UC_H
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namespace LIBC_NAMESPACE {
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unsigned char stdc_bit_ceil_uc(unsigned char value);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_STDBIT_STDC_BIT_CEIL_UC_H

‎libc/src/stdbit/stdc_bit_ceil_ui.cpp‎

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//===-- Implementation of stdc_bit_ceil_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_bit_ceil_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_bit_ceil_ui, (unsigned value)) {
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return cpp::bit_ceil(value);
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}
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} // namespace LIBC_NAMESPACE

‎libc/src/stdbit/stdc_bit_ceil_ui.h‎

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//===-- Implementation header for stdc_bit_ceil_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_BIT_CEIL_UI_H
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#define LLVM_LIBC_SRC_STDBIT_STDC_BIT_CEIL_UI_H
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namespace LIBC_NAMESPACE {
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unsigned stdc_bit_ceil_ui(unsigned value);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_STDBIT_STDC_BIT_CEIL_UI_H

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