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[libc][math][c23] Add modff128 C23 math function. (#84532)

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This commit is contained in:
lntue
2024-03-09 11:47:22 -05:00
committed by GitHub
parent 92d7aca441
commit 99f5e9634b
13 changed files with 95 additions and 9 deletions
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1
libc/config/linux/aarch64/entrypoints.txt
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@@ -434,6 +434,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
libc.src.math.llroundf128
libc.src.math.lrintf128
libc.src.math.lroundf128
libc.src.math.modff128
libc.src.math.rintf128
libc.src.math.roundf128
libc.src.math.sqrtf128

1
libc/config/linux/riscv/entrypoints.txt
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@@ -442,6 +442,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
libc.src.math.llroundf128
libc.src.math.lrintf128
libc.src.math.lroundf128
libc.src.math.modff128
libc.src.math.rintf128
libc.src.math.roundf128
libc.src.math.sqrtf128

1
libc/config/linux/x86_64/entrypoints.txt
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@@ -472,6 +472,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
libc.src.math.llroundf128
libc.src.math.lrintf128
libc.src.math.lroundf128
libc.src.math.modff128
libc.src.math.rintf128
libc.src.math.roundf128
libc.src.math.sqrtf128

2
libc/docs/math/index.rst
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@@ -249,6 +249,8 @@ Basic Operations
+--------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| modfl | |check| | |check| | |check| | |check| | |check| | | | |check| | |check| | |check| | | |
+--------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| modff128 | |check| | |check| | | |check| | | | | | | | | |
+--------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| nan | |check| | |check| | |check| | |check| | |check| | | | |check| | |check| | |check| | | |
+--------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| nanf | |check| | |check| | |check| | |check| | |check| | | | |check| | |check| | |check| | | |

1
libc/spec/spec.td
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@@ -111,6 +111,7 @@ def IntPtr : PtrType<IntType>;
def RestrictedIntPtr : RestrictedPtrType<IntType>;
def FloatPtr : PtrType<FloatType>;
def DoublePtr : PtrType<DoubleType>;
def Float128Ptr : PtrType<Float128Type>;
def UnsignedCharPtr : PtrType<UnsignedCharType>;
def SigHandlerT : NamedType<"__sighandler_t">;

1
libc/spec/stdc.td
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@@ -451,6 +451,7 @@ def StdC : StandardSpec<"stdc"> {
FunctionSpec<"modf", RetValSpec<DoubleType>, [ArgSpec<DoubleType>, ArgSpec<DoublePtr>]>,
FunctionSpec<"modff", RetValSpec<FloatType>, [ArgSpec<FloatType>, ArgSpec<FloatPtr>]>,
FunctionSpec<"modfl", RetValSpec<LongDoubleType>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoublePtr>]>,
GuardedFunctionSpec<"modff128", RetValSpec<Float128Type>, [ArgSpec<Float128Type>, ArgSpec<Float128Ptr>], "LIBC_TYPES_HAS_FLOAT128">,
FunctionSpec<"cos", RetValSpec<DoubleType>, [ArgSpec<DoubleType>]>,
FunctionSpec<"cosf", RetValSpec<FloatType>, [ArgSpec<FloatType>]>,

1
libc/src/math/CMakeLists.txt
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@@ -183,6 +183,7 @@ add_math_entrypoint_object(lroundf128)
add_math_entrypoint_object(modf)
add_math_entrypoint_object(modff)
add_math_entrypoint_object(modfl)
add_math_entrypoint_object(modff128)
add_math_entrypoint_object(nan)
add_math_entrypoint_object(nanf)

19
libc/src/math/generic/CMakeLists.txt
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@@ -1407,7 +1407,7 @@ add_entrypoint_object(
DEPENDS
libc.src.__support.FPUtil.manipulation_functions
COMPILE_OPTIONS
-O2
-O3
)
add_entrypoint_object(
@@ -1419,7 +1419,7 @@ add_entrypoint_object(
DEPENDS
libc.src.__support.FPUtil.manipulation_functions
COMPILE_OPTIONS
-O2
-O3
)
add_entrypoint_object(
@@ -1431,7 +1431,20 @@ add_entrypoint_object(
DEPENDS
libc.src.__support.FPUtil.manipulation_functions
COMPILE_OPTIONS
-O2
-O3
)
add_entrypoint_object(
modff128
SRCS
modff128.cpp
HDRS
../modff128.h
DEPENDS
libc.src.__support.macros.properties.types
libc.src.__support.FPUtil.manipulation_functions
COMPILE_OPTIONS
-O3
)
add_entrypoint_object(

19
libc/src/math/generic/modff128.cpp Normal file
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@@ -0,0 +1,19 @@
//===-- Implementation of modff128 function -------------------------------===//
//
// 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/math/modff128.h"
#include "src/__support/FPUtil/ManipulationFunctions.h"
#include "src/__support/common.h"
namespace LIBC_NAMESPACE {
LLVM_LIBC_FUNCTION(float128, modff128, (float128 x, float128 *iptr)) {
return fputil::modf(x, *iptr);
}
} // namespace LIBC_NAMESPACE

20
libc/src/math/modff128.h Normal file
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@@ -0,0 +1,20 @@
//===-- Implementation header for modff128 -----------------------*- 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_MATH_MODFF128_H
#define LLVM_LIBC_SRC_MATH_MODFF128_H
#include "src/__support/macros/properties/types.h"
namespace LIBC_NAMESPACE {
float128 modff128(float128 x, float128 *iptr);
} // namespace LIBC_NAMESPACE
#endif // LLVM_LIBC_SRC_MATH_MODFF128_H

19
libc/test/src/math/smoke/CMakeLists.txt
View File

@@ -1078,8 +1078,6 @@ add_fp_unittest(
libc.src.math.modf
libc.src.__support.FPUtil.basic_operations
libc.src.__support.FPUtil.nearest_integer_operations
# Requires C++ limits.
UNIT_TEST_ONLY
)
add_fp_unittest(
@@ -1095,8 +1093,6 @@ add_fp_unittest(
libc.src.math.modff
libc.src.__support.FPUtil.basic_operations
libc.src.__support.FPUtil.nearest_integer_operations
# Requires C++ limits.
UNIT_TEST_ONLY
)
add_fp_unittest(
@@ -1114,6 +1110,21 @@ add_fp_unittest(
libc.src.__support.FPUtil.nearest_integer_operations
)
add_fp_unittest(
modff128_test
SUITE
libc-math-smoke-tests
SRCS
modff128_test.cpp
HDRS
ModfTest.h
DEPENDS
libc.include.math
libc.src.math.modff128
libc.src.__support.FPUtil.basic_operations
libc.src.__support.FPUtil.nearest_integer_operations
)
add_fp_unittest(
fdimf_test
SUITE

6
libc/test/src/math/smoke/ModfTest.h
View File

@@ -84,10 +84,12 @@ public:
constexpr StorageType COUNT = 100'000;
constexpr StorageType STEP = STORAGE_MAX / COUNT;
for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
T x = FPBits(v).get_val();
if (isnan(x) || isinf(x) || x == T(0.0))
FPBits x_bits = FPBits(v);
if (x_bits.is_zero() || x_bits.is_inf_or_nan())
continue;
T x = x_bits.get_val();
T integral;
T frac = func(x, &integral);
ASSERT_TRUE(LIBC_NAMESPACE::fputil::abs(frac) < 1.0l);

13
libc/test/src/math/smoke/modff128_test.cpp Normal file
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@@ -0,0 +1,13 @@
//===-- Unittests for modff128 --------------------------------------------===//
//
// 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 "ModfTest.h"
#include "src/math/modff128.h"
LIST_MODF_TESTS(float128, LIBC_NAMESPACE::modff128)