[libc-commits] [libc] [libc][stdbit] implement stdc_count_ones (C23) (PR #82444)
via libc-commits
libc-commits at lists.llvm.org
Tue Feb 20 16:24:05 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libc
Author: Nick Desaulniers (nickdesaulniers)
<details>
<summary>Changes</summary>
---
Patch is 37.01 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/82444.diff
36 Files Affected:
- (modified) libc/config/linux/x86_64/entrypoints.txt (+10)
- (modified) libc/docs/stdbit.rst (+12-12)
- (modified) libc/include/llvm-libc-macros/stdbit-macros.h (+40)
- (modified) libc/spec/stdc.td (+14-2)
- (modified) libc/src/stdbit/CMakeLists.txt (+2)
- (added) libc/src/stdbit/stdc_count_ones_uc.cpp (+20)
- (added) libc/src/stdbit/stdc_count_ones_uc.h (+18)
- (added) libc/src/stdbit/stdc_count_ones_ui.cpp (+20)
- (added) libc/src/stdbit/stdc_count_ones_ui.h (+18)
- (added) libc/src/stdbit/stdc_count_ones_ul.cpp (+20)
- (added) libc/src/stdbit/stdc_count_ones_ul.h (+18)
- (added) libc/src/stdbit/stdc_count_ones_ull.cpp (+20)
- (added) libc/src/stdbit/stdc_count_ones_ull.h (+18)
- (added) libc/src/stdbit/stdc_count_ones_us.cpp (+20)
- (added) libc/src/stdbit/stdc_count_ones_us.h (+18)
- (added) libc/src/stdbit/stdc_count_zeros_uc.cpp (+20)
- (added) libc/src/stdbit/stdc_count_zeros_uc.h (+18)
- (added) libc/src/stdbit/stdc_count_zeros_ui.cpp (+20)
- (added) libc/src/stdbit/stdc_count_zeros_ui.h (+18)
- (added) libc/src/stdbit/stdc_count_zeros_ul.cpp (+20)
- (added) libc/src/stdbit/stdc_count_zeros_ul.h (+18)
- (added) libc/src/stdbit/stdc_count_zeros_ull.cpp (+20)
- (added) libc/src/stdbit/stdc_count_zeros_ull.h (+18)
- (added) libc/src/stdbit/stdc_count_zeros_us.cpp (+20)
- (added) libc/src/stdbit/stdc_count_zeros_us.h (+18)
- (modified) libc/test/include/stdbit_test.cpp (+26)
- (modified) libc/test/src/stdbit/CMakeLists.txt (+2)
- (added) libc/test/src/stdbit/stdc_count_ones_uc_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_ones_ul_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_ones_ull_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_ones_us_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_zeros_uc_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_zeros_ui_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_zeros_ul_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_zeros_ull_test.cpp (+21)
- (added) libc/test/src/stdbit/stdc_count_zeros_us_test.cpp (+21)
``````````diff
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index beb7a5ed448ded..f2a224d45bbae7 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -132,6 +132,16 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.stdbit.stdc_first_trailing_one_ui
libc.src.stdbit.stdc_first_trailing_one_ul
libc.src.stdbit.stdc_first_trailing_one_ull
+ libc.src.stdbit.stdc_count_zeros_uc
+ libc.src.stdbit.stdc_count_zeros_us
+ libc.src.stdbit.stdc_count_zeros_ui
+ libc.src.stdbit.stdc_count_zeros_ul
+ libc.src.stdbit.stdc_count_zeros_ull
+ libc.src.stdbit.stdc_count_ones_uc
+ libc.src.stdbit.stdc_count_ones_us
+ libc.src.stdbit.stdc_count_ones_ui
+ libc.src.stdbit.stdc_count_ones_ul
+ libc.src.stdbit.stdc_count_ones_ull
# stdlib.h entrypoints
libc.src.stdlib.abs
diff --git a/libc/docs/stdbit.rst b/libc/docs/stdbit.rst
index 3bd83ff70c8924..0308caeb929321 100644
--- a/libc/docs/stdbit.rst
+++ b/libc/docs/stdbit.rst
@@ -71,16 +71,16 @@ stdc_first_trailing_one_us |check|
stdc_first_trailing_one_ui |check|
stdc_first_trailing_one_ul |check|
stdc_first_trailing_one_ull |check|
-stdc_count_zeros_uc
-stdc_count_zeros_us
-stdc_count_zeros_ui
-stdc_count_zeros_ul
-stdc_count_zeros_ull
-stdc_count_ones_uc
-stdc_count_ones_us
-stdc_count_ones_ui
-stdc_count_ones_ul
-stdc_count_ones_ull
+stdc_count_zeros_uc |check|
+stdc_count_zeros_us |check|
+stdc_count_zeros_ui |check|
+stdc_count_zeros_ul |check|
+stdc_count_zeros_ull |check|
+stdc_count_ones_uc |check|
+stdc_count_ones_us |check|
+stdc_count_ones_ui |check|
+stdc_count_ones_ul |check|
+stdc_count_ones_ull |check|
stdc_has_single_bit_uc
stdc_has_single_bit_us
stdc_has_single_bit_ui
@@ -122,8 +122,8 @@ stdc_first_leading_zero |check|
stdc_first_leading_one |check|
stdc_first_trailing_zero |check|
stdc_first_trailing_one |check|
-stdc_count_zeros
-stdc_count_ones
+stdc_count_zeros |check|
+stdc_count_ones |check|
stdc_has_single_bit
stdc_bit_width
stdc_bit_floor
diff --git a/libc/include/llvm-libc-macros/stdbit-macros.h b/libc/include/llvm-libc-macros/stdbit-macros.h
index 0c97da96ebba29..5ee152e105f772 100644
--- a/libc/include/llvm-libc-macros/stdbit-macros.h
+++ b/libc/include/llvm-libc-macros/stdbit-macros.h
@@ -131,6 +131,32 @@ inline unsigned stdc_first_trailing_one(unsigned long x) {
inline unsigned stdc_first_trailing_one(unsigned long long x) {
return stdc_first_trailing_one_ull(x);
}
+inline unsigned stdc_count_zeros(unsigned char x) {
+ return stdc_count_zeros_uc(x);
+}
+inline unsigned stdc_count_zeros(unsigned short x) {
+ return stdc_count_zeros_us(x);
+}
+inline unsigned stdc_count_zeros(unsigned x) { return stdc_count_zeros_ui(x); }
+inline unsigned stdc_count_zeros(unsigned long x) {
+ return stdc_count_zeros_ul(x);
+}
+inline unsigned stdc_count_zeros(unsigned long long x) {
+ return stdc_count_zeros_ull(x);
+}
+inline unsigned stdc_count_ones(unsigned char x) {
+ return stdc_count_ones_uc(x);
+}
+inline unsigned stdc_count_ones(unsigned short x) {
+ return stdc_count_ones_us(x);
+}
+inline unsigned stdc_count_ones(unsigned x) { return stdc_count_ones_ui(x); }
+inline unsigned stdc_count_ones(unsigned long x) {
+ return stdc_count_ones_ul(x);
+}
+inline unsigned stdc_count_ones(unsigned long long x) {
+ return stdc_count_ones_ull(x);
+}
#else
#define stdc_leading_zeros(x) \
_Generic((x), \
@@ -188,6 +214,20 @@ inline unsigned stdc_first_trailing_one(unsigned long long x) {
unsigned: stdc_first_trailing_one_ui, \
unsigned long: stdc_first_trailing_one_ul, \
unsigned long long: stdc_first_trailing_one_ull)(x)
+#define stdc_count_zeros(x) \
+ _Generic((x), \
+ unsigned char: stdc_count_zeros_uc, \
+ unsigned short: stdc_count_zeros_us, \
+ unsigned: stdc_count_zeros_ui, \
+ unsigned long: stdc_count_zeros_ul, \
+ unsigned long long: stdc_count_zeros_ull)(x)
+#define stdc_count_ones(x) \
+ _Generic((x), \
+ unsigned char: stdc_count_ones_uc, \
+ unsigned short: stdc_count_ones_us, \
+ unsigned: stdc_count_ones_ui, \
+ unsigned long: stdc_count_ones_ul, \
+ unsigned long long: stdc_count_ones_ull)(x)
#endif // __cplusplus
#endif // __LLVM_LIBC_MACROS_STDBIT_MACROS_H
diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td
index 3fe19fae4c2e51..6b292588b6c7ae 100644
--- a/libc/spec/stdc.td
+++ b/libc/spec/stdc.td
@@ -790,7 +790,9 @@ def StdC : StandardSpec<"stdc"> {
Macro<"stdc_first_leading_zero">,
Macro<"stdc_first_leading_one">,
Macro<"stdc_first_trailing_zero">,
- Macro<"stdc_first_trailing_one">
+ Macro<"stdc_first_trailing_one">,
+ Macro<"stdc_count_zeros">,
+ Macro<"stdc_count_ones">
], // Macros
[], // Types
[], // Enumerations
@@ -829,7 +831,17 @@ def StdC : StandardSpec<"stdc"> {
FunctionSpec<"stdc_first_trailing_one_us", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedShortType>]>,
FunctionSpec<"stdc_first_trailing_one_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
FunctionSpec<"stdc_first_trailing_one_ul", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongType>]>,
- FunctionSpec<"stdc_first_trailing_one_ull", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongLongType>]>
+ FunctionSpec<"stdc_first_trailing_one_ull", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongLongType>]>,
+ FunctionSpec<"stdc_count_zeros_uc", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedCharType>]>,
+ FunctionSpec<"stdc_count_zeros_us", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedShortType>]>,
+ FunctionSpec<"stdc_count_zeros_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
+ FunctionSpec<"stdc_count_zeros_ul", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongType>]>,
+ FunctionSpec<"stdc_count_zeros_ull", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongLongType>]>,
+ FunctionSpec<"stdc_count_ones_uc", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedCharType>]>,
+ FunctionSpec<"stdc_count_ones_us", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedShortType>]>,
+ FunctionSpec<"stdc_count_ones_ui", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedIntType>]>,
+ FunctionSpec<"stdc_count_ones_ul", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongType>]>,
+ FunctionSpec<"stdc_count_ones_ull", RetValSpec<UnsignedIntType>, [ArgSpec<UnsignedLongLongType>]>
] // Functions
>;
diff --git a/libc/src/stdbit/CMakeLists.txt b/libc/src/stdbit/CMakeLists.txt
index 14cc26e206e0d3..5fb77d21e57a13 100644
--- a/libc/src/stdbit/CMakeLists.txt
+++ b/libc/src/stdbit/CMakeLists.txt
@@ -7,6 +7,8 @@ set(prefixes
first_leading_one
first_trailing_zero
first_trailing_one
+ count_zeros
+ count_ones
)
set(suffixes c s i l ll)
foreach(prefix IN LISTS prefixes)
diff --git a/libc/src/stdbit/stdc_count_ones_uc.cpp b/libc/src/stdbit/stdc_count_ones_uc.cpp
new file mode 100644
index 00000000000000..5a7314caa3baa0
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_uc.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_ones_uc ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_ones_uc.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_ones_uc, (unsigned char value)) {
+ return static_cast<unsigned>(cpp::count_ones(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_ones_uc.h b/libc/src/stdbit/stdc_count_ones_uc.h
new file mode 100644
index 00000000000000..eed3ee5f181b66
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_uc.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_ones_uc -----------*- 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_STDBIT_STDC_COUNT_ONES_UC_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UC_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_ones_uc(unsigned char value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UC_H
diff --git a/libc/src/stdbit/stdc_count_ones_ui.cpp b/libc/src/stdbit/stdc_count_ones_ui.cpp
new file mode 100644
index 00000000000000..289f4bac31f7b8
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ui.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_ones_ui ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_ones_ui.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_ones_ui, (unsigned value)) {
+ return static_cast<unsigned>(cpp::count_ones(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_ones_ui.h b/libc/src/stdbit/stdc_count_ones_ui.h
new file mode 100644
index 00000000000000..1f7ccb9c502f64
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ui.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_ones_ui -----------*- 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_STDBIT_STDC_COUNT_ONES_UI_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UI_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_ones_ui(unsigned value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UI_H
diff --git a/libc/src/stdbit/stdc_count_ones_ul.cpp b/libc/src/stdbit/stdc_count_ones_ul.cpp
new file mode 100644
index 00000000000000..83f3279d791937
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ul.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_ones_ul ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_ones_ul.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_ones_ul, (unsigned long value)) {
+ return static_cast<unsigned>(cpp::count_ones(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_ones_ul.h b/libc/src/stdbit/stdc_count_ones_ul.h
new file mode 100644
index 00000000000000..bde349a2fb94f2
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ul.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_ones_ul -----------*- 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_STDBIT_STDC_COUNT_ONES_UL_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UL_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_ones_ul(unsigned long value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_UL_H
diff --git a/libc/src/stdbit/stdc_count_ones_ull.cpp b/libc/src/stdbit/stdc_count_ones_ull.cpp
new file mode 100644
index 00000000000000..104788aaf21265
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ull.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_ones_ull -----------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_ones_ull.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_ones_ull, (unsigned long long value)) {
+ return static_cast<unsigned>(cpp::count_ones(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_ones_ull.h b/libc/src/stdbit/stdc_count_ones_ull.h
new file mode 100644
index 00000000000000..830239f8874b08
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_ull.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_ones_ull -----------*- 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_STDBIT_STDC_COUNT_ONES_ULL_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_ULL_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_ones_ull(unsigned long long value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_ULL_H
diff --git a/libc/src/stdbit/stdc_count_ones_us.cpp b/libc/src/stdbit/stdc_count_ones_us.cpp
new file mode 100644
index 00000000000000..4b6ff0b94b626a
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_us.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_ones_us ------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_ones_us.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_ones_us, (unsigned short value)) {
+ return static_cast<unsigned>(cpp::count_ones(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_ones_us.h b/libc/src/stdbit/stdc_count_ones_us.h
new file mode 100644
index 00000000000000..08fd4e76eaae69
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_ones_us.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_ones_us -----------*- 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_STDBIT_STDC_COUNT_ONES_US_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_US_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_ones_us(unsigned short value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ONES_US_H
diff --git a/libc/src/stdbit/stdc_count_zeros_uc.cpp b/libc/src/stdbit/stdc_count_zeros_uc.cpp
new file mode 100644
index 00000000000000..22c57bd60c3846
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_zeros_uc.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_zeros_uc -----------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_zeros_uc.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_zeros_uc, (unsigned char value)) {
+ return static_cast<unsigned>(cpp::count_zeros(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_zeros_uc.h b/libc/src/stdbit/stdc_count_zeros_uc.h
new file mode 100644
index 00000000000000..34b4636ee3f9e5
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_zeros_uc.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_zeros_uc -----------*- 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_STDBIT_STDC_COUNT_ZEROS_UC_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ZEROS_UC_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_zeros_uc(unsigned char value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ZEROS_UC_H
diff --git a/libc/src/stdbit/stdc_count_zeros_ui.cpp b/libc/src/stdbit/stdc_count_zeros_ui.cpp
new file mode 100644
index 00000000000000..6a1defd9d555b2
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_zeros_ui.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of stdc_count_zeros_ui -----------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdbit/stdc_count_zeros_ui.h"
+
+#include "src/__support/CPP/bit.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(unsigned, stdc_count_zeros_ui, (unsigned value)) {
+ return static_cast<unsigned>(cpp::count_zeros(value));
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdbit/stdc_count_zeros_ui.h b/libc/src/stdbit/stdc_count_zeros_ui.h
new file mode 100644
index 00000000000000..48e8630f6f0971
--- /dev/null
+++ b/libc/src/stdbit/stdc_count_zeros_ui.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for stdc_count_zeros_ui -----------*- 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_STDBIT_STDC_COUNT_ZEROS_UI_H
+#define LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ZEROS_UI_H
+
+namespace LIBC_NAMESPACE {
+
+unsigned stdc_count_zeros_ui(unsigned value);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDBIT_STDC_COUNT_ZEROS_UI_H
diff --git a/libc/src/stdbit/stdc_count_zeros_ul.cpp b/libc/src/stdbit/stdc...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/82444
More information about the libc-commits
mailing list