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[libc][math][c23] Add getpayloadf16 C23 math function
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13 files changed

+167
-1
lines changed

13 files changed

+167
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‎libc/config/linux/aarch64/entrypoints.txt

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@@ -520,6 +520,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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libc.src.math.frexpf16
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libc.src.math.fromfpf16
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libc.src.math.fromfpxf16
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libc.src.math.getpayloadf16
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libc.src.math.ilogbf16
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libc.src.math.llogbf16
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libc.src.math.llrintf16

‎libc/config/linux/x86_64/entrypoints.txt

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@@ -553,6 +553,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
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libc.src.math.frexpf16
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libc.src.math.fromfpf16
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libc.src.math.fromfpxf16
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libc.src.math.getpayloadf16
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libc.src.math.ilogbf16
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libc.src.math.llogbf16
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libc.src.math.llrintf16

‎libc/docs/c23.rst

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@@ -44,7 +44,7 @@ Additions:
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* compoundn*
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* totalorder* |check|
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* totalordermag* |check|
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* getpayload*
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* getpayload* |check|
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* setpayload*
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* iscannonical
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* issignaling

‎libc/docs/math/index.rst

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@@ -168,6 +168,8 @@ Basic Operations
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| fsub | N/A | | | N/A | | 7.12.14.2 | F.10.11 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| getpayload | | | | |check| | | F.10.13.1 | N/A |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| ilogb | |check| | |check| | |check| | |check| | |check| | 7.12.6.8 | F.10.3.8 |
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+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
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| ldexp | |check| | |check| | |check| | | |check| | 7.12.6.9 | F.10.3.9 |

‎libc/spec/stdc.td

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@@ -715,6 +715,8 @@ def StdC : StandardSpec<"stdc"> {
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GuardedFunctionSpec<"totalordermagf16", RetValSpec<IntType>, [ArgSpec<Float16Ptr>, ArgSpec<Float16Ptr>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"getpayloadf16", RetValSpec<Float16Type>, [ArgSpec<Float16Ptr>], "LIBC_TYPES_HAS_FLOAT16">,
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GuardedFunctionSpec<"f16sqrtf", RetValSpec<Float16Type>, [ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,
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]
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>;

‎libc/src/__support/FPUtil/BasicOperations.h

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@@ -265,6 +265,17 @@ totalordermag(T x, T y) {
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return FPBits<T>(x).abs().uintval() <= FPBits<T>(y).abs().uintval();
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}
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template <typename T>
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LIBC_INLINE cpp::enable_if_t<cpp::is_floating_point_v<T>, T> getpayload(T x) {
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using FPBits = FPBits<T>;
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FPBits x_bits(x);
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if (!x_bits.is_nan())
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return T(-1.0);
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return T(x_bits.uintval() & (FPBits::FRACTION_MASK >> 1));
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}
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} // namespace fputil
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} // namespace LIBC_NAMESPACE
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‎libc/src/math/CMakeLists.txt

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@@ -208,6 +208,8 @@ add_math_entrypoint_object(fromfpxl)
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add_math_entrypoint_object(fromfpxf16)
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add_math_entrypoint_object(fromfpxf128)
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add_math_entrypoint_object(getpayloadf16)
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add_math_entrypoint_object(hypot)
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add_math_entrypoint_object(hypotf)
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‎libc/src/math/generic/CMakeLists.txt

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@@ -3602,6 +3602,19 @@ add_entrypoint_object(
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-O3
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)
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add_entrypoint_object(
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getpayloadf16
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SRCS
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getpayloadf16.cpp
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HDRS
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../getpayloadf16.h
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DEPENDS
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libc.src.__support.macros.properties.types
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libc.src.__support.FPUtil.basic_operations
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COMPILE_OPTIONS
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-O3
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)
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add_entrypoint_object(
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f16sqrtf
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SRCS

‎libc/src/math/generic/getpayloadf16.cpp

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//===-- Implementation of getpayloadf16 function --------------------------===//
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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/math/getpayloadf16.h"
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#include "src/__support/FPUtil/BasicOperations.h"
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#include "src/__support/common.h"
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namespace LIBC_NAMESPACE {
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LLVM_LIBC_FUNCTION(float16, getpayloadf16, (const float16 *x)) {
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return fputil::getpayload(*x);
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}
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} // namespace LIBC_NAMESPACE

‎libc/src/math/getpayloadf16.h

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//===-- Implementation header for getpayloadf16 -----------------*- 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_MATH_GETPAYLOADF16_H
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#define LLVM_LIBC_SRC_MATH_GETPAYLOADF16_H
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#include "src/__support/macros/properties/types.h"
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namespace LIBC_NAMESPACE {
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float16 getpayloadf16(const float16 *x);
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} // namespace LIBC_NAMESPACE
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#endif // LLVM_LIBC_SRC_MATH_GETPAYLOADF16_H

‎libc/test/src/math/smoke/CMakeLists.txt

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@@ -3548,6 +3548,18 @@ add_fp_unittest(
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libc.src.math.totalordermagf16
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)
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add_fp_unittest(
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getpayloadf16_test
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SUITE
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libc-math-smoke-tests
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SRCS
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getpayloadf16_test.cpp
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HDRS
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GetPayloadTest.h
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DEPENDS
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libc.src.math.getpayloadf16
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)
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add_fp_unittest(
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f16sqrtf_test
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SUITE

‎libc/test/src/math/smoke/GetPayloadTest.h

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//===-- Utility class to test different flavors of getpayload ---*- 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 LIBC_TEST_SRC_MATH_SMOKE_GETPAYLOADTEST_H
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#define LIBC_TEST_SRC_MATH_SMOKE_GETPAYLOADTEST_H
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#include "test/UnitTest/FEnvSafeTest.h"
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#include "test/UnitTest/FPMatcher.h"
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#include "test/UnitTest/Test.h"
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template <typename T>
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class GetPayloadTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
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DECLARE_SPECIAL_CONSTANTS(T)
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public:
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typedef T (*GetPayloadFunc)(const T *);
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T funcWrapper(GetPayloadFunc func, T x) { return func(&x); }
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void testNonNaNs(GetPayloadFunc func) {
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(0.0)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(-0.0)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(0.1)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(-0.1)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(123.38)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, T(-123.38)));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, inf));
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EXPECT_FP_EQ(T(-1.0), funcWrapper(func, neg_inf));
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}
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void testNaNs(GetPayloadFunc func) {
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EXPECT_FP_EQ(T(0.0), funcWrapper(func, aNaN));
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EXPECT_FP_EQ(T(0.0), funcWrapper(func, neg_aNaN));
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T default_snan_payload = StorageType(1) << (FPBits::SIG_LEN - 2);
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EXPECT_FP_EQ(default_snan_payload, funcWrapper(func, sNaN));
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EXPECT_FP_EQ(default_snan_payload, funcWrapper(func, neg_sNaN));
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T qnan_42 = FPBits::quiet_nan(Sign::POS, 0x42).get_val();
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T neg_qnan_42 = FPBits::quiet_nan(Sign::NEG, 0x42).get_val();
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T snan_42 = FPBits::signaling_nan(Sign::POS, 0x42).get_val();
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T neg_snan_42 = FPBits::signaling_nan(Sign::NEG, 0x42).get_val();
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EXPECT_FP_EQ(T(0x42.0p+0), funcWrapper(func, qnan_42));
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EXPECT_FP_EQ(T(0x42.0p+0), funcWrapper(func, neg_qnan_42));
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EXPECT_FP_EQ(T(0x42.0p+0), funcWrapper(func, snan_42));
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EXPECT_FP_EQ(T(0x42.0p+0), funcWrapper(func, neg_snan_42));
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T qnan_123 = FPBits::quiet_nan(Sign::POS, 0x123).get_val();
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T neg_qnan_123 = FPBits::quiet_nan(Sign::NEG, 0x123).get_val();
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T snan_123 = FPBits::signaling_nan(Sign::POS, 0x123).get_val();
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T neg_snan_123 = FPBits::signaling_nan(Sign::NEG, 0x123).get_val();
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EXPECT_FP_EQ(T(0x123.0p+0), funcWrapper(func, qnan_123));
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EXPECT_FP_EQ(T(0x123.0p+0), funcWrapper(func, neg_qnan_123));
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EXPECT_FP_EQ(T(0x123.0p+0), funcWrapper(func, snan_123));
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EXPECT_FP_EQ(T(0x123.0p+0), funcWrapper(func, neg_snan_123));
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}
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};
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#define LIST_GETPAYLOAD_TESTS(T, func) \
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using LlvmLibcGetPayloadTest = GetPayloadTestTemplate<T>; \
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TEST_F(LlvmLibcGetPayloadTest, NonNaNs) { testNonNaNs(&func); } \
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TEST_F(LlvmLibcGetPayloadTest, NaNs) { testNaNs(&func); }
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#endif // LIBC_TEST_SRC_MATH_SMOKE_GETPAYLOADTEST_H

‎libc/test/src/math/smoke/getpayloadf16_test.cpp

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//===-- Unittests for getpayloadf16 ---------------------------------------===//
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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 "GetPayloadTest.h"
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#include "src/math/getpayloadf16.h"
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LIST_GETPAYLOAD_TESTS(float16, LIBC_NAMESPACE::getpayloadf16)

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