diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt index d53b225e4d87e2..57b4a1e0f93d4f 100644 --- a/libc/config/linux/x86_64/entrypoints.txt +++ b/libc/config/linux/x86_64/entrypoints.txt @@ -127,6 +127,11 @@ set(TARGET_LIBC_ENTRYPOINTS libc.src.stdbit.stdc_first_trailing_zero_ui libc.src.stdbit.stdc_first_trailing_zero_ul libc.src.stdbit.stdc_first_trailing_zero_ull + libc.src.stdbit.stdc_first_trailing_one_uc + libc.src.stdbit.stdc_first_trailing_one_us + libc.src.stdbit.stdc_first_trailing_one_ui + libc.src.stdbit.stdc_first_trailing_one_ul + libc.src.stdbit.stdc_first_trailing_one_ull # stdlib.h entrypoints libc.src.stdlib.abs diff --git a/libc/docs/stdbit.rst b/libc/docs/stdbit.rst index 790a747baaa2da..3bd83ff70c8924 100644 --- a/libc/docs/stdbit.rst +++ b/libc/docs/stdbit.rst @@ -66,11 +66,11 @@ stdc_first_trailing_zero_us |check| stdc_first_trailing_zero_ui |check| stdc_first_trailing_zero_ul |check| stdc_first_trailing_zero_ull |check| -stdc_first_trailing_one_uc -stdc_first_trailing_one_us -stdc_first_trailing_one_ui -stdc_first_trailing_one_ul -stdc_first_trailing_one_ull +stdc_first_trailing_one_uc |check| +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 @@ -121,7 +121,7 @@ stdc_trailing_ones |check| stdc_first_leading_zero |check| stdc_first_leading_one |check| stdc_first_trailing_zero |check| -stdc_first_trailing_one +stdc_first_trailing_one |check| stdc_count_zeros stdc_count_ones stdc_has_single_bit diff --git a/libc/include/llvm-libc-macros/stdbit-macros.h b/libc/include/llvm-libc-macros/stdbit-macros.h index 0ec8aef10d3e0a..0c97da96ebba29 100644 --- a/libc/include/llvm-libc-macros/stdbit-macros.h +++ b/libc/include/llvm-libc-macros/stdbit-macros.h @@ -116,6 +116,21 @@ inline unsigned stdc_first_trailing_zero(unsigned long x) { inline unsigned stdc_first_trailing_zero(unsigned long long x) { return stdc_first_trailing_zero_ull(x); } +inline unsigned stdc_first_trailing_one(unsigned char x) { + return stdc_first_trailing_one_uc(x); +} +inline unsigned stdc_first_trailing_one(unsigned short x) { + return stdc_first_trailing_one_us(x); +} +inline unsigned stdc_first_trailing_one(unsigned x) { + return stdc_first_trailing_one_ui(x); +} +inline unsigned stdc_first_trailing_one(unsigned long x) { + return stdc_first_trailing_one_ul(x); +} +inline unsigned stdc_first_trailing_one(unsigned long long x) { + return stdc_first_trailing_one_ull(x); +} #else #define stdc_leading_zeros(x) \ _Generic((x), \ @@ -166,6 +181,13 @@ inline unsigned stdc_first_trailing_zero(unsigned long long x) { unsigned: stdc_first_trailing_zero_ui, \ unsigned long: stdc_first_trailing_zero_ul, \ unsigned long long: stdc_first_trailing_zero_ull)(x) +#define stdc_first_trailing_one(x) \ + _Generic((x), \ + unsigned char: stdc_first_trailing_one_uc, \ + unsigned short: stdc_first_trailing_one_us, \ + unsigned: stdc_first_trailing_one_ui, \ + unsigned long: stdc_first_trailing_one_ul, \ + unsigned long long: stdc_first_trailing_one_ull)(x) #endif // __cplusplus #endif // __LLVM_LIBC_MACROS_STDBIT_MACROS_H diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td index b97e90d1a8ae34..9ed94638f522ca 100644 --- a/libc/spec/stdc.td +++ b/libc/spec/stdc.td @@ -783,7 +783,8 @@ def StdC : StandardSpec<"stdc"> { Macro<"stdc_trailing_ones">, Macro<"stdc_first_leading_zero">, Macro<"stdc_first_leading_one">, - Macro<"stdc_first_trailing_zero"> + Macro<"stdc_first_trailing_zero">, + Macro<"stdc_first_trailing_one"> ], // Macros [], // Types [], // Enumerations @@ -818,11 +819,11 @@ def StdC : StandardSpec<"stdc"> { FunctionSpec<"stdc_first_leading_one_ui", RetValSpec, [ArgSpec]>, FunctionSpec<"stdc_first_leading_one_ul", RetValSpec, [ArgSpec]>, FunctionSpec<"stdc_first_leading_one_ull", RetValSpec, [ArgSpec]>, - FunctionSpec<"stdc_first_trailing_zero_uc", RetValSpec, [ArgSpec]>, - FunctionSpec<"stdc_first_trailing_zero_us", RetValSpec, [ArgSpec]>, - FunctionSpec<"stdc_first_trailing_zero_ui", RetValSpec, [ArgSpec]>, - FunctionSpec<"stdc_first_trailing_zero_ul", RetValSpec, [ArgSpec]>, - FunctionSpec<"stdc_first_trailing_zero_ull", RetValSpec, [ArgSpec]>, + FunctionSpec<"stdc_first_trailing_one_uc", RetValSpec, [ArgSpec]>, + FunctionSpec<"stdc_first_trailing_one_us", RetValSpec, [ArgSpec]>, + FunctionSpec<"stdc_first_trailing_one_ui", RetValSpec, [ArgSpec]>, + FunctionSpec<"stdc_first_trailing_one_ul", RetValSpec, [ArgSpec]>, + FunctionSpec<"stdc_first_trailing_one_ull", RetValSpec, [ArgSpec]> ] // Functions >; diff --git a/libc/src/__support/CPP/bit.h b/libc/src/__support/CPP/bit.h index 5afcc875752cff..f5e50262371f26 100644 --- a/libc/src/__support/CPP/bit.h +++ b/libc/src/__support/CPP/bit.h @@ -243,6 +243,11 @@ template >> : countr_zero(static_cast(~value)) + 1; } +template >> +[[nodiscard]] LIBC_INLINE constexpr int first_trailing_one(T value) { + return value == cpp::numeric_limits::max() ? 0 : countr_zero(value) + 1; +} + } // namespace LIBC_NAMESPACE::cpp #endif // LLVM_LIBC_SRC___SUPPORT_CPP_BIT_H diff --git a/libc/src/stdbit/CMakeLists.txt b/libc/src/stdbit/CMakeLists.txt index fa68d4a90dbb7e..14cc26e206e0d3 100644 --- a/libc/src/stdbit/CMakeLists.txt +++ b/libc/src/stdbit/CMakeLists.txt @@ -6,6 +6,7 @@ set(prefixes first_leading_zero first_leading_one first_trailing_zero + first_trailing_one ) set(suffixes c s i l ll) foreach(prefix IN LISTS prefixes) diff --git a/libc/src/stdbit/stdc_first_trailing_one_uc.cpp b/libc/src/stdbit/stdc_first_trailing_one_uc.cpp new file mode 100644 index 00000000000000..6ed35966be61a0 --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_uc.cpp @@ -0,0 +1,21 @@ +//===-- Implementation of stdc_first_trailing_one_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_first_trailing_one_uc.h" + +#include "src/__support/CPP/bit.h" +#include "src/__support/common.h" + +namespace LIBC_NAMESPACE { + +LLVM_LIBC_FUNCTION(unsigned, stdc_first_trailing_one_uc, + (unsigned char value)) { + return static_cast(cpp::first_trailing_one(value)); +} + +} // namespace LIBC_NAMESPACE diff --git a/libc/src/stdbit/stdc_first_trailing_one_uc.h b/libc/src/stdbit/stdc_first_trailing_one_uc.h new file mode 100644 index 00000000000000..d733ce850de0fb --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_uc.h @@ -0,0 +1,18 @@ +//===-- Implementation header for stdc_first_trailing_one_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_FIRST_TRAILING_ONE_UC_H +#define LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UC_H + +namespace LIBC_NAMESPACE { + +unsigned stdc_first_trailing_one_uc(unsigned char value); + +} // namespace LIBC_NAMESPACE + +#endif // LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UC_H diff --git a/libc/src/stdbit/stdc_first_trailing_one_ui.cpp b/libc/src/stdbit/stdc_first_trailing_one_ui.cpp new file mode 100644 index 00000000000000..a89083bd49507a --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ui.cpp @@ -0,0 +1,20 @@ +//===-- Implementation of stdc_first_trailing_one_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_first_trailing_one_ui.h" + +#include "src/__support/CPP/bit.h" +#include "src/__support/common.h" + +namespace LIBC_NAMESPACE { + +LLVM_LIBC_FUNCTION(unsigned, stdc_first_trailing_one_ui, (unsigned value)) { + return static_cast(cpp::first_trailing_one(value)); +} + +} // namespace LIBC_NAMESPACE diff --git a/libc/src/stdbit/stdc_first_trailing_one_ui.h b/libc/src/stdbit/stdc_first_trailing_one_ui.h new file mode 100644 index 00000000000000..6a6a5046709aec --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ui.h @@ -0,0 +1,18 @@ +//===-- Implementation header for stdc_first_trailing_one_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_FIRST_TRAILING_ONE_UI_H +#define LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UI_H + +namespace LIBC_NAMESPACE { + +unsigned stdc_first_trailing_one_ui(unsigned value); + +} // namespace LIBC_NAMESPACE + +#endif // LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UI_H diff --git a/libc/src/stdbit/stdc_first_trailing_one_ul.cpp b/libc/src/stdbit/stdc_first_trailing_one_ul.cpp new file mode 100644 index 00000000000000..f30078d0f5ffaa --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ul.cpp @@ -0,0 +1,21 @@ +//===-- Implementation of stdc_first_trailing_one_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_first_trailing_one_ul.h" + +#include "src/__support/CPP/bit.h" +#include "src/__support/common.h" + +namespace LIBC_NAMESPACE { + +LLVM_LIBC_FUNCTION(unsigned, stdc_first_trailing_one_ul, + (unsigned long value)) { + return static_cast(cpp::first_trailing_one(value)); +} + +} // namespace LIBC_NAMESPACE diff --git a/libc/src/stdbit/stdc_first_trailing_one_ul.h b/libc/src/stdbit/stdc_first_trailing_one_ul.h new file mode 100644 index 00000000000000..09b6a9bbbe34a1 --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ul.h @@ -0,0 +1,18 @@ +//===-- Implementation header for stdc_first_trailing_one_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_FIRST_TRAILING_ONE_UL_H +#define LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UL_H + +namespace LIBC_NAMESPACE { + +unsigned stdc_first_trailing_one_ul(unsigned long value); + +} // namespace LIBC_NAMESPACE + +#endif // LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_UL_H diff --git a/libc/src/stdbit/stdc_first_trailing_one_ull.cpp b/libc/src/stdbit/stdc_first_trailing_one_ull.cpp new file mode 100644 index 00000000000000..2e526a890cda9c --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ull.cpp @@ -0,0 +1,21 @@ +//===-- Implementation of stdc_first_trailing_one_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_first_trailing_one_ull.h" + +#include "src/__support/CPP/bit.h" +#include "src/__support/common.h" + +namespace LIBC_NAMESPACE { + +LLVM_LIBC_FUNCTION(unsigned, stdc_first_trailing_one_ull, + (unsigned long long value)) { + return static_cast(cpp::first_trailing_one(value)); +} + +} // namespace LIBC_NAMESPACE diff --git a/libc/src/stdbit/stdc_first_trailing_one_ull.h b/libc/src/stdbit/stdc_first_trailing_one_ull.h new file mode 100644 index 00000000000000..3e12a1d7456691 --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_ull.h @@ -0,0 +1,18 @@ +//===-- Implementation header for stdc_first_trailing_one_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_FIRST_TRAILING_ONE_ULL_H +#define LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_ULL_H + +namespace LIBC_NAMESPACE { + +unsigned stdc_first_trailing_one_ull(unsigned long long value); + +} // namespace LIBC_NAMESPACE + +#endif // LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_ULL_H diff --git a/libc/src/stdbit/stdc_first_trailing_one_us.cpp b/libc/src/stdbit/stdc_first_trailing_one_us.cpp new file mode 100644 index 00000000000000..e4c88e0d7906b9 --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_us.cpp @@ -0,0 +1,21 @@ +//===-- Implementation of stdc_first_trailing_one_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_first_trailing_one_us.h" + +#include "src/__support/CPP/bit.h" +#include "src/__support/common.h" + +namespace LIBC_NAMESPACE { + +LLVM_LIBC_FUNCTION(unsigned, stdc_first_trailing_one_us, + (unsigned short value)) { + return static_cast(cpp::first_trailing_one(value)); +} + +} // namespace LIBC_NAMESPACE diff --git a/libc/src/stdbit/stdc_first_trailing_one_us.h b/libc/src/stdbit/stdc_first_trailing_one_us.h new file mode 100644 index 00000000000000..f380898fc68cde --- /dev/null +++ b/libc/src/stdbit/stdc_first_trailing_one_us.h @@ -0,0 +1,18 @@ +//===-- Implementation header for stdc_first_trailing_one_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_FIRST_TRAILING_ONE_US_H +#define LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_US_H + +namespace LIBC_NAMESPACE { + +unsigned stdc_first_trailing_one_us(unsigned short value); + +} // namespace LIBC_NAMESPACE + +#endif // LLVM_LIBC_SRC_STDBIT_STDC_FIRST_TRAILING_ONE_US_H diff --git a/libc/test/include/stdbit_test.cpp b/libc/test/include/stdbit_test.cpp index 238c2d44fac45a..22d5533df1e854 100644 --- a/libc/test/include/stdbit_test.cpp +++ b/libc/test/include/stdbit_test.cpp @@ -64,6 +64,13 @@ unsigned stdc_first_trailing_zero_ul(unsigned long) noexcept { return 0x0DU; } unsigned stdc_first_trailing_zero_ull(unsigned long long) noexcept { return 0x0FU; } +unsigned stdc_first_trailing_one_uc(unsigned char) noexcept { return 0x1AU; } +unsigned stdc_first_trailing_one_us(unsigned short) noexcept { return 0x1BU; } +unsigned stdc_first_trailing_one_ui(unsigned) noexcept { return 0x1CU; } +unsigned stdc_first_trailing_one_ul(unsigned long) noexcept { return 0x1DU; } +unsigned stdc_first_trailing_one_ull(unsigned long long) noexcept { + return 0x1FU; +} } #include "include/llvm-libc-macros/stdbit-macros.h" @@ -123,3 +130,11 @@ TEST(LlvmLibcStdbitTest, TypeGenericMacroFirstTrailingZero) { EXPECT_EQ(stdc_first_trailing_zero(0UL), 0x0DU); EXPECT_EQ(stdc_first_trailing_zero(0ULL), 0x0FU); } + +TEST(LlvmLibcStdbitTest, TypeGenericMacroFirstTrailingOne) { + EXPECT_EQ(stdc_first_trailing_one(static_cast(0U)), 0x1AU); + EXPECT_EQ(stdc_first_trailing_one(static_cast(0U)), 0x1BU); + EXPECT_EQ(stdc_first_trailing_one(0U), 0x1CU); + EXPECT_EQ(stdc_first_trailing_one(0UL), 0x1DU); + EXPECT_EQ(stdc_first_trailing_one(0ULL), 0x1FU); +} diff --git a/libc/test/src/__support/CPP/bit_test.cpp b/libc/test/src/__support/CPP/bit_test.cpp index 914c6ca823c8ef..5d1f451776a5fe 100644 --- a/libc/test/src/__support/CPP/bit_test.cpp +++ b/libc/test/src/__support/CPP/bit_test.cpp @@ -226,4 +226,10 @@ TYPED_TEST(LlvmLibcBitTest, FirstTrailingZero, UnsignedTypes) { EXPECT_EQ(first_trailing_zero(~(T(1) << i)), i + 1); } +TYPED_TEST(LlvmLibcBitTest, FirstTrailingOne, UnsignedTypes) { + EXPECT_EQ(first_trailing_one(cpp::numeric_limits::max()), 0); + for (int i = 0U; i != cpp::numeric_limits::digits; ++i) + EXPECT_EQ(first_trailing_one(T(1) << i), i + 1); +} + } // namespace LIBC_NAMESPACE::cpp diff --git a/libc/test/src/stdbit/CMakeLists.txt b/libc/test/src/stdbit/CMakeLists.txt index d5896ad83dbfab..203f48bda99a44 100644 --- a/libc/test/src/stdbit/CMakeLists.txt +++ b/libc/test/src/stdbit/CMakeLists.txt @@ -8,6 +8,7 @@ set(prefixes first_leading_zero first_leading_one first_trailing_zero + first_trailing_one ) set(suffixes c s i l ll) foreach(prefix IN LISTS prefixes) diff --git a/libc/test/src/stdbit/stdc_first_trailing_one_uc_test.cpp b/libc/test/src/stdbit/stdc_first_trailing_one_uc_test.cpp new file mode 100644 index 00000000000000..ed2b4921cdada4 --- /dev/null +++ b/libc/test/src/stdbit/stdc_first_trailing_one_uc_test.cpp @@ -0,0 +1,20 @@ +//===-- Unittests for stdc_first_trailing_one_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/__support/CPP/limits.h" +#include "src/stdbit/stdc_first_trailing_one_uc.h" +#include "test/UnitTest/Test.h" + +TEST(LlvmLibcStdcFirstTrailingOneUcTest, ALL) { + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_uc(UCHAR_MAX), 0U); +} + +TEST(LlvmLibcStdcFirstTrailingOneUcTest, OneHot) { + for (unsigned i = 0U; i != UCHAR_WIDTH; ++i) + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_uc(1U << i), i + 1); +} diff --git a/libc/test/src/stdbit/stdc_first_trailing_one_ui_test.cpp b/libc/test/src/stdbit/stdc_first_trailing_one_ui_test.cpp new file mode 100644 index 00000000000000..137c8a42e407df --- /dev/null +++ b/libc/test/src/stdbit/stdc_first_trailing_one_ui_test.cpp @@ -0,0 +1,20 @@ +//===-- Unittests for stdc_first_trailing_one_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/__support/CPP/limits.h" +#include "src/stdbit/stdc_first_trailing_one_ui.h" +#include "test/UnitTest/Test.h" + +TEST(LlvmLibcStdcFirstTrailingOneUiTest, ALL) { + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ui(UINT_MAX), 0U); +} + +TEST(LlvmLibcStdcFirstTrailingOneUiTest, OneHot) { + for (unsigned i = 0U; i != UINT_WIDTH; ++i) + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ui(1U << i), i + 1); +} diff --git a/libc/test/src/stdbit/stdc_first_trailing_one_ul_test.cpp b/libc/test/src/stdbit/stdc_first_trailing_one_ul_test.cpp new file mode 100644 index 00000000000000..3fc1f3f16c60de --- /dev/null +++ b/libc/test/src/stdbit/stdc_first_trailing_one_ul_test.cpp @@ -0,0 +1,20 @@ +//===-- Unittests for stdc_first_trailing_one_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/__support/CPP/limits.h" +#include "src/stdbit/stdc_first_trailing_one_ul.h" +#include "test/UnitTest/Test.h" + +TEST(LlvmLibcStdcFirstTrailingOneUlTest, ALL) { + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ul(ULONG_MAX), 0U); +} + +TEST(LlvmLibcStdcFirstTrailingOneUlTest, OneHot) { + for (unsigned i = 0U; i != ULONG_WIDTH; ++i) + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ul(1UL << i), i + 1); +} diff --git a/libc/test/src/stdbit/stdc_first_trailing_one_ull_test.cpp b/libc/test/src/stdbit/stdc_first_trailing_one_ull_test.cpp new file mode 100644 index 00000000000000..5719e09a5120a0 --- /dev/null +++ b/libc/test/src/stdbit/stdc_first_trailing_one_ull_test.cpp @@ -0,0 +1,20 @@ +//===-- Unittests for stdc_first_trailing_one_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/__support/CPP/limits.h" +#include "src/stdbit/stdc_first_trailing_one_ull.h" +#include "test/UnitTest/Test.h" + +TEST(LlvmLibcStdcFirstTrailingOneUllTest, ALL) { + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ull(ULLONG_MAX), 0U); +} + +TEST(LlvmLibcStdcFirstTrailingOneUllTest, OneHot) { + for (unsigned i = 0U; i != ULLONG_WIDTH; ++i) + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_ull(1ULL << i), i + 1); +} diff --git a/libc/test/src/stdbit/stdc_first_trailing_one_us_test.cpp b/libc/test/src/stdbit/stdc_first_trailing_one_us_test.cpp new file mode 100644 index 00000000000000..60021552310bee --- /dev/null +++ b/libc/test/src/stdbit/stdc_first_trailing_one_us_test.cpp @@ -0,0 +1,20 @@ +//===-- Unittests for stdc_first_trailing_one_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/__support/CPP/limits.h" +#include "src/stdbit/stdc_first_trailing_one_us.h" +#include "test/UnitTest/Test.h" + +TEST(LlvmLibcStdcFirstTrailingOneUsTest, ALL) { + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_us(USHRT_MAX), 0U); +} + +TEST(LlvmLibcStdcFirstTrailingOneUsTest, OneHot) { + for (unsigned i = 0U; i != USHRT_WIDTH; ++i) + EXPECT_EQ(LIBC_NAMESPACE::stdc_first_trailing_one_us(1U << i), i + 1); +}