[libc-commits] [libc] 12a1e6d - [libc][math][c23] Add f16{add, sub}f C23 math functions (#96787)
via libc-commits
libc-commits at lists.llvm.org
Tue Jul 2 06:16:15 PDT 2024
Author: OverMighty
Date: 2024-07-02T09:16:12-04:00
New Revision: 12a1e6dd1292efb3d7c45582ba20dafa523b51cc
URL: https://github.com/llvm/llvm-project/commit/12a1e6dd1292efb3d7c45582ba20dafa523b51cc
DIFF: https://github.com/llvm/llvm-project/commit/12a1e6dd1292efb3d7c45582ba20dafa523b51cc.diff
LOG: [libc][math][c23] Add f16{add,sub}f C23 math functions (#96787)
Part of #93566.
Added:
libc/src/__support/FPUtil/generic/add_sub.h
libc/src/math/f16addf.h
libc/src/math/f16subf.h
libc/src/math/generic/f16addf.cpp
libc/src/math/generic/f16subf.cpp
libc/test/src/math/AddTest.h
libc/test/src/math/SubTest.h
libc/test/src/math/f16addf_test.cpp
libc/test/src/math/f16subf_test.cpp
libc/test/src/math/smoke/AddTest.h
libc/test/src/math/smoke/SubTest.h
libc/test/src/math/smoke/f16addf_test.cpp
libc/test/src/math/smoke/f16subf_test.cpp
Modified:
libc/config/linux/aarch64/entrypoints.txt
libc/config/linux/x86_64/entrypoints.txt
libc/docs/math/index.rst
libc/spec/llvm_libc_ext.td
libc/src/__support/FPUtil/generic/CMakeLists.txt
libc/src/math/CMakeLists.txt
libc/src/math/generic/CMakeLists.txt
libc/test/src/math/CMakeLists.txt
libc/test/src/math/smoke/CMakeLists.txt
libc/utils/MPFRWrapper/MPFRUtils.cpp
libc/utils/MPFRWrapper/MPFRUtils.h
Removed:
################################################################################
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 07fdbfdbcd7c9..ff35e8fffec19 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -508,11 +508,13 @@ if(LIBC_TYPES_HAS_FLOAT16)
libc.src.math.canonicalizef16
libc.src.math.ceilf16
libc.src.math.copysignf16
+ libc.src.math.f16addf
libc.src.math.f16div
libc.src.math.f16divf
libc.src.math.f16fmaf
libc.src.math.f16sqrt
libc.src.math.f16sqrtf
+ libc.src.math.f16subf
libc.src.math.fabsf16
libc.src.math.fdimf16
libc.src.math.floorf16
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 89f9011a52b64..3eefa129c9758 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -538,6 +538,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
libc.src.math.canonicalizef16
libc.src.math.ceilf16
libc.src.math.copysignf16
+ libc.src.math.f16addf
libc.src.math.f16div
libc.src.math.f16divf
libc.src.math.f16divl
@@ -547,6 +548,7 @@ if(LIBC_TYPES_HAS_FLOAT16)
libc.src.math.f16sqrt
libc.src.math.f16sqrtf
libc.src.math.f16sqrtl
+ libc.src.math.f16subf
libc.src.math.fabsf16
libc.src.math.fdimf16
libc.src.math.floorf16
diff --git a/libc/docs/math/index.rst b/libc/docs/math/index.rst
index ccafb1f9c73fc..e4da3d42baf7a 100644
--- a/libc/docs/math/index.rst
+++ b/libc/docs/math/index.rst
@@ -124,10 +124,14 @@ Basic Operations
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
| dsub | N/A | N/A | | N/A | | 7.12.14.2 | F.10.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
+| f16add | |check|\* | | | N/A | | 7.12.14.1 | F.10.11 |
++------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
| f16div | |check|\* | |check|\* | |check|\* | N/A | |check| | 7.12.14.4 | F.10.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
| f16fma | |check| | |check| | |check| | N/A | |check| | 7.12.14.5 | F.10.11 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
+| f16sub | |check|\* | | | N/A | | 7.12.14.2 | F.10.11 |
++------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
| fabs | |check| | |check| | |check| | |check| | |check| | 7.12.7.3 | F.10.4.3 |
+------------------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
| fadd | N/A | | | N/A | | 7.12.14.1 | F.10.11 |
diff --git a/libc/spec/llvm_libc_ext.td b/libc/spec/llvm_libc_ext.td
index 74a90a4d04132..ff7831f8bce16 100644
--- a/libc/spec/llvm_libc_ext.td
+++ b/libc/spec/llvm_libc_ext.td
@@ -57,6 +57,10 @@ def LLVMLibcExt : StandardSpec<"llvm_libc_ext"> {
[], // Types
[], // Enumerations
[
+ GuardedFunctionSpec<"f16addf", RetValSpec<Float16Type>, [ArgSpec<FloatType>, ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,
+
+ GuardedFunctionSpec<"f16subf", RetValSpec<Float16Type>, [ArgSpec<FloatType>, ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,
+
GuardedFunctionSpec<"f16div", RetValSpec<Float16Type>, [ArgSpec<DoubleType>, ArgSpec<DoubleType>], "LIBC_TYPES_HAS_FLOAT16">,
GuardedFunctionSpec<"f16divf", RetValSpec<Float16Type>, [ArgSpec<FloatType>, ArgSpec<FloatType>], "LIBC_TYPES_HAS_FLOAT16">,
GuardedFunctionSpec<"f16divl", RetValSpec<Float16Type>, [ArgSpec<LongDoubleType>, ArgSpec<LongDoubleType>], "LIBC_TYPES_HAS_FLOAT16">,
diff --git a/libc/src/__support/FPUtil/generic/CMakeLists.txt b/libc/src/__support/FPUtil/generic/CMakeLists.txt
index fb49fd0039537..c73f68723e232 100644
--- a/libc/src/__support/FPUtil/generic/CMakeLists.txt
+++ b/libc/src/__support/FPUtil/generic/CMakeLists.txt
@@ -49,6 +49,25 @@ add_header_library(
libc.src.__support.macros.optimization
)
+add_header_library(
+ add_sub
+ HDRS
+ add_sub.h
+ DEPENDS
+ libc.hdr.errno_macros
+ libc.hdr.fenv_macros
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.CPP.bit
+ libc.src.__support.CPP.type_traits
+ libc.src.__support.FPUtil.basic_operations
+ libc.src.__support.FPUtil.fenv_impl
+ libc.src.__support.FPUtil.fp_bits
+ libc.src.__support.FPUtil.dyadic_float
+ libc.src.__support.FPUtil.rounding_mode
+ libc.src.__support.macros.attributes
+ libc.src.__support.macros.optimization
+)
+
add_header_library(
div
HDRS
diff --git a/libc/src/__support/FPUtil/generic/add_sub.h b/libc/src/__support/FPUtil/generic/add_sub.h
new file mode 100644
index 0000000000000..a522deae31368
--- /dev/null
+++ b/libc/src/__support/FPUtil/generic/add_sub.h
@@ -0,0 +1,206 @@
+//===-- Add and subtract IEEE 754 floating-point numbers --------*- 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___SUPPORT_FPUTIL_GENERIC_ADD_SUB_H
+#define LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_ADD_SUB_H
+
+#include "hdr/errno_macros.h"
+#include "hdr/fenv_macros.h"
+#include "src/__support/CPP/algorithm.h"
+#include "src/__support/CPP/bit.h"
+#include "src/__support/CPP/type_traits.h"
+#include "src/__support/FPUtil/BasicOperations.h"
+#include "src/__support/FPUtil/FEnvImpl.h"
+#include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/FPUtil/dyadic_float.h"
+#include "src/__support/FPUtil/rounding_mode.h"
+#include "src/__support/macros/attributes.h"
+#include "src/__support/macros/optimization.h"
+
+namespace LIBC_NAMESPACE::fputil::generic {
+
+template <bool IsSub, typename OutType, typename InType>
+LIBC_INLINE cpp::enable_if_t<cpp::is_floating_point_v<OutType> &&
+ cpp::is_floating_point_v<InType> &&
+ sizeof(OutType) <= sizeof(InType),
+ OutType>
+add_or_sub(InType x, InType y) {
+ using OutFPBits = FPBits<OutType>;
+ using OutStorageType = typename OutFPBits::StorageType;
+ using InFPBits = FPBits<InType>;
+ using InStorageType = typename InFPBits::StorageType;
+
+ constexpr int GUARD_BITS_LEN = 3;
+ constexpr int RESULT_FRACTION_LEN = InFPBits::FRACTION_LEN + GUARD_BITS_LEN;
+ constexpr int RESULT_MANTISSA_LEN = RESULT_FRACTION_LEN + 1;
+
+ using DyadicFloat =
+ DyadicFloat<cpp::bit_ceil(static_cast<size_t>(RESULT_MANTISSA_LEN))>;
+
+ InFPBits x_bits(x);
+ InFPBits y_bits(y);
+
+ bool is_effectively_add = (x_bits.sign() == y_bits.sign()) != IsSub;
+
+ if (LIBC_UNLIKELY(x_bits.is_inf_or_nan() || y_bits.is_inf_or_nan() ||
+ x_bits.is_zero() || y_bits.is_zero())) {
+ if (x_bits.is_nan() || y_bits.is_nan()) {
+ if (x_bits.is_signaling_nan() || y_bits.is_signaling_nan())
+ raise_except_if_required(FE_INVALID);
+
+ if (x_bits.is_quiet_nan()) {
+ InStorageType x_payload = static_cast<InStorageType>(getpayload(x));
+ if ((x_payload & ~(OutFPBits::FRACTION_MASK >> 1)) == 0)
+ return OutFPBits::quiet_nan(x_bits.sign(),
+ static_cast<OutStorageType>(x_payload))
+ .get_val();
+ }
+
+ if (y_bits.is_quiet_nan()) {
+ InStorageType y_payload = static_cast<InStorageType>(getpayload(y));
+ if ((y_payload & ~(OutFPBits::FRACTION_MASK >> 1)) == 0)
+ return OutFPBits::quiet_nan(y_bits.sign(),
+ static_cast<OutStorageType>(y_payload))
+ .get_val();
+ }
+
+ return OutFPBits::quiet_nan().get_val();
+ }
+
+ if (x_bits.is_inf()) {
+ if (y_bits.is_inf()) {
+ if (!is_effectively_add) {
+ raise_except_if_required(FE_INVALID);
+ return OutFPBits::quiet_nan().get_val();
+ }
+
+ return OutFPBits::inf(x_bits.sign()).get_val();
+ }
+
+ return OutFPBits::inf(x_bits.sign()).get_val();
+ }
+
+ if (y_bits.is_inf())
+ return OutFPBits::inf(y_bits.sign()).get_val();
+
+ if (x_bits.is_zero()) {
+ if (y_bits.is_zero()) {
+ switch (quick_get_round()) {
+ case FE_DOWNWARD:
+ return OutFPBits::zero(Sign::NEG).get_val();
+ default:
+ return OutFPBits::zero(Sign::POS).get_val();
+ }
+ }
+
+ // volatile prevents Clang from converting tmp to OutType and then
+ // immediately back to InType before negating it, resulting in double
+ // rounding.
+ volatile InType tmp = y;
+ if constexpr (IsSub)
+ tmp = -tmp;
+ return static_cast<OutType>(tmp);
+ }
+
+ if (y_bits.is_zero()) {
+ volatile InType tmp = y;
+ if constexpr (IsSub)
+ tmp = -tmp;
+ return static_cast<OutType>(tmp);
+ }
+ }
+
+ InType x_abs = x_bits.abs().get_val();
+ InType y_abs = y_bits.abs().get_val();
+
+ if (x_abs == y_abs && !is_effectively_add) {
+ switch (quick_get_round()) {
+ case FE_DOWNWARD:
+ return OutFPBits::zero(Sign::NEG).get_val();
+ default:
+ return OutFPBits::zero(Sign::POS).get_val();
+ }
+ }
+
+ Sign result_sign = Sign::POS;
+
+ if (x_abs > y_abs) {
+ result_sign = x_bits.sign();
+ } else if (x_abs < y_abs) {
+ if (is_effectively_add)
+ result_sign = y_bits.sign();
+ else if (y_bits.is_pos())
+ result_sign = Sign::NEG;
+ } else if (is_effectively_add) {
+ result_sign = x_bits.sign();
+ }
+
+ InFPBits max_bits(cpp::max(x_abs, y_abs));
+ InFPBits min_bits(cpp::min(x_abs, y_abs));
+
+ InStorageType result_mant;
+
+ if (max_bits.is_subnormal()) {
+ // min_bits must be subnormal too.
+
+ if (is_effectively_add)
+ result_mant = max_bits.get_mantissa() + min_bits.get_mantissa();
+ else
+ result_mant = max_bits.get_mantissa() - min_bits.get_mantissa();
+
+ result_mant <<= GUARD_BITS_LEN;
+ } else {
+ InStorageType max_mant = max_bits.get_explicit_mantissa() << GUARD_BITS_LEN;
+ InStorageType min_mant = min_bits.get_explicit_mantissa() << GUARD_BITS_LEN;
+ int alignment =
+ max_bits.get_biased_exponent() - min_bits.get_biased_exponent();
+
+ InStorageType aligned_min_mant =
+ min_mant >> cpp::min(alignment, RESULT_MANTISSA_LEN);
+ bool aligned_min_mant_sticky;
+
+ if (alignment <= 3)
+ aligned_min_mant_sticky = false;
+ else if (alignment <= InFPBits::FRACTION_LEN + 3)
+ aligned_min_mant_sticky =
+ (min_mant << (InFPBits::STORAGE_LEN - alignment)) != 0;
+ else
+ aligned_min_mant_sticky = true;
+
+ if (is_effectively_add)
+ result_mant = max_mant + (aligned_min_mant | aligned_min_mant_sticky);
+ else
+ result_mant = max_mant - (aligned_min_mant | aligned_min_mant_sticky);
+ }
+
+ int result_exp = max_bits.get_exponent() - RESULT_FRACTION_LEN;
+ DyadicFloat result(result_sign, result_exp, result_mant);
+ return result.template as<OutType, /*ShouldSignalExceptions=*/true>();
+}
+
+template <typename OutType, typename InType>
+LIBC_INLINE cpp::enable_if_t<cpp::is_floating_point_v<OutType> &&
+ cpp::is_floating_point_v<InType> &&
+ sizeof(OutType) <= sizeof(InType),
+ OutType>
+add(InType x, InType y) {
+ return add_or_sub</*IsSub=*/false, OutType>(x, y);
+}
+
+template <typename OutType, typename InType>
+LIBC_INLINE cpp::enable_if_t<cpp::is_floating_point_v<OutType> &&
+ cpp::is_floating_point_v<InType> &&
+ sizeof(OutType) <= sizeof(InType),
+ OutType>
+sub(InType x, InType y) {
+ return add_or_sub</*IsSub=*/true, OutType>(x, y);
+}
+
+} // namespace LIBC_NAMESPACE::fputil::generic
+
+#endif // LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_ADD_SUB_H
diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index 607051a6ad78d..5b20913134fdf 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -99,6 +99,8 @@ add_math_entrypoint_object(exp10f)
add_math_entrypoint_object(expm1)
add_math_entrypoint_object(expm1f)
+add_math_entrypoint_object(f16addf)
+
add_math_entrypoint_object(f16div)
add_math_entrypoint_object(f16divf)
add_math_entrypoint_object(f16divl)
@@ -114,6 +116,8 @@ add_math_entrypoint_object(f16sqrtf)
add_math_entrypoint_object(f16sqrtl)
add_math_entrypoint_object(f16sqrtf128)
+add_math_entrypoint_object(f16subf)
+
add_math_entrypoint_object(fabs)
add_math_entrypoint_object(fabsf)
add_math_entrypoint_object(fabsl)
diff --git a/libc/src/math/f16addf.h b/libc/src/math/f16addf.h
new file mode 100644
index 0000000000000..31d0e786584e6
--- /dev/null
+++ b/libc/src/math/f16addf.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for f16addf -----------------------*- 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_F16ADDF_H
+#define LLVM_LIBC_SRC_MATH_F16ADDF_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+float16 f16addf(float x, float y);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_F16ADDF_H
diff --git a/libc/src/math/f16subf.h b/libc/src/math/f16subf.h
new file mode 100644
index 0000000000000..1d04a4c952d17
--- /dev/null
+++ b/libc/src/math/f16subf.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for f16subf -----------------------*- 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_F16SUBF_H
+#define LLVM_LIBC_SRC_MATH_F16SUBF_H
+
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE {
+
+float16 f16subf(float x, float y);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_MATH_F16SUBF_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 395d4f8cc9270..d6ea8c54174b6 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -3795,6 +3795,32 @@ add_entrypoint_object(
-O3
)
+add_entrypoint_object(
+ f16addf
+ SRCS
+ f16addf.cpp
+ HDRS
+ ../f16addf.h
+ DEPENDS
+ libc.src.__support.macros.properties.types
+ libc.src.__support.FPUtil.generic.add_sub
+ COMPILE_OPTIONS
+ -O3
+)
+
+add_entrypoint_object(
+ f16subf
+ SRCS
+ f16subf.cpp
+ HDRS
+ ../f16subf.h
+ DEPENDS
+ libc.src.__support.macros.properties.types
+ libc.src.__support.FPUtil.generic.add_sub
+ COMPILE_OPTIONS
+ -O3
+)
+
add_entrypoint_object(
f16div
SRCS
diff --git a/libc/src/math/generic/f16addf.cpp b/libc/src/math/generic/f16addf.cpp
new file mode 100644
index 0000000000000..f1761a193985d
--- /dev/null
+++ b/libc/src/math/generic/f16addf.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of f16addf 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/f16addf.h"
+#include "src/__support/FPUtil/generic/add_sub.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float16, f16addf, (float x, float y)) {
+ return fputil::generic::add<float16>(x, y);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/math/generic/f16subf.cpp b/libc/src/math/generic/f16subf.cpp
new file mode 100644
index 0000000000000..e4532a456b7b8
--- /dev/null
+++ b/libc/src/math/generic/f16subf.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of f16subf 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/f16subf.h"
+#include "src/__support/FPUtil/generic/add_sub.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(float16, f16subf, (float x, float y)) {
+ return fputil::generic::sub<float16>(x, y);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/test/src/math/AddTest.h b/libc/test/src/math/AddTest.h
new file mode 100644
index 0000000000000..df0ef66cfeefa
--- /dev/null
+++ b/libc/test/src/math/AddTest.h
@@ -0,0 +1,74 @@
+//===-- Utility class to test
diff erent flavors of float add ----*- 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_TEST_SRC_MATH_ADDTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
+
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+#include "utils/MPFRWrapper/MPFRUtils.h"
+
+namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+
+template <typename OutType, typename InType>
+class AddTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+ struct InConstants {
+ DECLARE_SPECIAL_CONSTANTS(InType)
+ };
+
+ using InFPBits = typename InConstants::FPBits;
+ using InStorageType = typename InConstants::StorageType;
+
+ static constexpr InStorageType IN_MAX_NORMAL_U =
+ InFPBits::max_normal().uintval();
+ static constexpr InStorageType IN_MIN_NORMAL_U =
+ InFPBits::min_normal().uintval();
+ static constexpr InStorageType IN_MAX_SUBNORMAL_U =
+ InFPBits::max_subnormal().uintval();
+ static constexpr InStorageType IN_MIN_SUBNORMAL_U =
+ InFPBits::min_subnormal().uintval();
+
+public:
+ typedef OutType (*AddFunc)(InType, InType);
+
+ void test_subnormal_range(AddFunc func) {
+ constexpr InStorageType COUNT = 100'001;
+ constexpr InStorageType STEP =
+ (IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) / COUNT;
+ for (InStorageType i = 0, v = 0, w = IN_MAX_SUBNORMAL_U; i <= COUNT;
+ ++i, v += STEP, w -= STEP) {
+ InType x = InFPBits(v).get_val();
+ InType y = InFPBits(w).get_val();
+ mpfr::BinaryInput<InType> input{x, y};
+ EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
+ 0.5);
+ }
+ }
+
+ void test_normal_range(AddFunc func) {
+ constexpr InStorageType COUNT = 100'001;
+ constexpr InStorageType STEP = (IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT;
+ for (InStorageType i = 0, v = 0, w = IN_MAX_NORMAL_U; i <= COUNT;
+ ++i, v += STEP, w -= STEP) {
+ InType x = InFPBits(v).get_val();
+ InType y = InFPBits(w).get_val();
+ mpfr::BinaryInput<InType> input{x, y};
+ EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
+ 0.5);
+ }
+ }
+};
+
+#define LIST_ADD_TESTS(OutType, InType, func) \
+ using LlvmLibcAddTest = AddTest<OutType, InType>; \
+ TEST_F(LlvmLibcAddTest, SubnormalRange) { test_subnormal_range(&func); } \
+ TEST_F(LlvmLibcAddTest, NormalRange) { test_normal_range(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index 9eda5db1ea2fc..637e6720400ff 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -1996,6 +1996,32 @@ add_fp_unittest(
libc.src.__support.FPUtil.fp_bits
)
+add_fp_unittest(
+ f16addf_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ f16addf_test.cpp
+ HDRS
+ AddTest.h
+ DEPENDS
+ libc.src.math.f16addf
+)
+
+add_fp_unittest(
+ f16subf_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ f16subf_test.cpp
+ HDRS
+ SubTest.h
+ DEPENDS
+ libc.src.math.f16subf
+)
+
add_fp_unittest(
f16div_test
NEED_MPFR
diff --git a/libc/test/src/math/SubTest.h b/libc/test/src/math/SubTest.h
new file mode 100644
index 0000000000000..9b4035344b468
--- /dev/null
+++ b/libc/test/src/math/SubTest.h
@@ -0,0 +1,74 @@
+//===-- Utility class to test
diff erent flavors of float sub ----*- 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_TEST_SRC_MATH_SUBTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H
+
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+#include "utils/MPFRWrapper/MPFRUtils.h"
+
+namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+
+template <typename OutType, typename InType>
+class SubTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+ struct InConstants {
+ DECLARE_SPECIAL_CONSTANTS(InType)
+ };
+
+ using InFPBits = typename InConstants::FPBits;
+ using InStorageType = typename InConstants::StorageType;
+
+ static constexpr InStorageType IN_MAX_NORMAL_U =
+ InFPBits::max_normal().uintval();
+ static constexpr InStorageType IN_MIN_NORMAL_U =
+ InFPBits::min_normal().uintval();
+ static constexpr InStorageType IN_MAX_SUBNORMAL_U =
+ InFPBits::max_subnormal().uintval();
+ static constexpr InStorageType IN_MIN_SUBNORMAL_U =
+ InFPBits::min_subnormal().uintval();
+
+public:
+ using SubFunc = OutType (*)(InType, InType);
+
+ void test_subnormal_range(SubFunc func) {
+ constexpr InStorageType COUNT = 100'001;
+ constexpr InStorageType STEP =
+ (IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) / COUNT;
+ for (InStorageType i = 0, v = 0, w = IN_MAX_SUBNORMAL_U; i <= COUNT;
+ ++i, v += STEP, w -= STEP) {
+ InType x = InFPBits(v).get_val();
+ InType y = InFPBits(w).get_val();
+ mpfr::BinaryInput<InType> input{x, y};
+ EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sub, input, func(x, y),
+ 0.5);
+ }
+ }
+
+ void test_normal_range(SubFunc func) {
+ constexpr InStorageType COUNT = 100'001;
+ constexpr InStorageType STEP = (IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT;
+ for (InStorageType i = 0, v = 0, w = IN_MAX_NORMAL_U; i <= COUNT;
+ ++i, v += STEP, w -= STEP) {
+ InType x = InFPBits(v).get_val();
+ InType y = InFPBits(w).get_val();
+ mpfr::BinaryInput<InType> input{x, y};
+ EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sub, input, func(x, y),
+ 0.5);
+ }
+ }
+};
+
+#define LIST_SUB_TESTS(OutType, InType, func) \
+ using LlvmLibcSubTest = SubTest<OutType, InType>; \
+ TEST_F(LlvmLibcSubTest, SubnormalRange) { test_subnormal_range(&func); } \
+ TEST_F(LlvmLibcSubTest, NormalRange) { test_normal_range(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H
diff --git a/libc/test/src/math/f16addf_test.cpp b/libc/test/src/math/f16addf_test.cpp
new file mode 100644
index 0000000000000..1e8b4323114ad
--- /dev/null
+++ b/libc/test/src/math/f16addf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for f16addf ---------------------------------------------===//
+//
+// 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 "AddTest.h"
+
+#include "src/math/f16addf.h"
+
+LIST_ADD_TESTS(float16, float, LIBC_NAMESPACE::f16addf)
diff --git a/libc/test/src/math/f16subf_test.cpp b/libc/test/src/math/f16subf_test.cpp
new file mode 100644
index 0000000000000..68ad9482ab1e4
--- /dev/null
+++ b/libc/test/src/math/f16subf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for f16subf ---------------------------------------------===//
+//
+// 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 "SubTest.h"
+
+#include "src/math/f16subf.h"
+
+LIST_SUB_TESTS(float16, float, LIBC_NAMESPACE::f16subf)
diff --git a/libc/test/src/math/smoke/AddTest.h b/libc/test/src/math/smoke/AddTest.h
new file mode 100644
index 0000000000000..c713c5a88763c
--- /dev/null
+++ b/libc/test/src/math/smoke/AddTest.h
@@ -0,0 +1,156 @@
+//===-- Utility class to test
diff erent flavors of float add ----*- 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_TEST_SRC_MATH_SMOKE_ADDTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_ADDTEST_H
+
+#include "hdr/errno_macros.h"
+#include "hdr/fenv_macros.h"
+#include "src/__support/FPUtil/BasicOperations.h"
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+template <typename OutType, typename InType>
+class AddTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+ DECLARE_SPECIAL_CONSTANTS(OutType)
+
+ struct InConstants {
+ DECLARE_SPECIAL_CONSTANTS(InType)
+ };
+
+ using InFPBits = typename InConstants::FPBits;
+ using InStorageType = typename InConstants::StorageType;
+
+ InConstants in;
+
+public:
+ using AddFunc = OutType (*)(InType, InType);
+
+ void test_special_numbers(AddFunc func) {
+ EXPECT_FP_IS_NAN(func(aNaN, aNaN));
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(sNaN, sNaN), FE_INVALID);
+
+ InType qnan_42 = InFPBits::quiet_nan(Sign::POS, 0x42).get_val();
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_42, zero)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(zero, qnan_42)));
+
+ if constexpr (sizeof(OutType) < sizeof(InType)) {
+ InStorageType max_payload = InFPBits::FRACTION_MASK >> 1;
+ InType qnan_max = InFPBits::quiet_nan(Sign::POS, max_payload).get_val();
+ EXPECT_FP_EQ(zero,
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_max, zero)));
+ EXPECT_FP_EQ(zero,
+ LIBC_NAMESPACE::fputil::getpayload(func(zero, qnan_max)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_max, qnan_42)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_42, qnan_max)));
+ }
+
+ EXPECT_FP_EQ(inf, func(inf, zero));
+ EXPECT_FP_EQ(neg_inf, func(neg_inf, zero));
+ EXPECT_FP_EQ(inf, func(inf, neg_zero));
+ EXPECT_FP_EQ(neg_inf, func(neg_inf, neg_zero));
+ }
+
+ void test_invalid_operations(AddFunc func) {
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(inf, neg_inf), FE_INVALID);
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(neg_inf, inf), FE_INVALID);
+ }
+
+ void test_range_errors(AddFunc func) {
+ using namespace LIBC_NAMESPACE::fputil::testing;
+
+ if (ForceRoundingMode r(RoundingMode::Nearest); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(-inf, func(neg_max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero, func(in.min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(
+ neg_zero, func(in.neg_min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::TowardZero); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(max_normal, func(max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_max_normal,
+ func(neg_max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero, func(in.min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(
+ neg_zero, func(in.neg_min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::Downward); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(max_normal, func(max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_FP_EQ_WITH_EXCEPTION(-inf, func(neg_max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero, func(in.min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(
+ neg_min_denormal, func(in.neg_min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::Upward); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_max_normal,
+ func(neg_max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(min_denormal,
+ func(in.min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(
+ neg_zero, func(in.neg_min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+ }
+
+ void test_inexact_results(AddFunc func) {
+ func(InType(1.0), min_denormal);
+ EXPECT_FP_EXCEPTION(FE_INEXACT);
+ }
+};
+
+#define LIST_ADD_TESTS(OutType, InType, func) \
+ using LlvmLibcAddTest = AddTest<OutType, InType>; \
+ TEST_F(LlvmLibcAddTest, SpecialNumbers) { test_special_numbers(&func); } \
+ TEST_F(LlvmLibcAddTest, InvalidOperations) { \
+ test_invalid_operations(&func); \
+ } \
+ TEST_F(LlvmLibcAddTest, RangeErrors) { test_range_errors(&func); } \
+ TEST_F(LlvmLibcAddTest, InexactResults) { test_inexact_results(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_ADDTEST_H
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
index a363644e6fa83..1b269edaa2477 100644
--- a/libc/test/src/math/smoke/CMakeLists.txt
+++ b/libc/test/src/math/smoke/CMakeLists.txt
@@ -3643,6 +3643,35 @@ add_fp_unittest(
libc.src.math.setpayloadsigf16
)
+add_fp_unittest(
+ f16addf_test
+ SUITE
+ libc-math-smoke-tests
+ SRCS
+ f16addf_test.cpp
+ HDRS
+ AddTest.h
+ DEPENDS
+ libc.hdr.errno_macros
+ libc.hdr.fenv_macros
+ libc.src.__support.FPUtil.basic_operations
+ libc.src.math.f16addf
+)
+
+add_fp_unittest(
+ f16subf_test
+ SUITE
+ libc-math-smoke-tests
+ SRCS
+ f16subf_test.cpp
+ HDRS
+ SubTest.h
+ DEPENDS
+ libc.hdr.fenv_macros
+ libc.src.__support.FPUtil.basic_operations
+ libc.src.math.f16subf
+)
+
add_fp_unittest(
f16div_test
SUITE
diff --git a/libc/test/src/math/smoke/SubTest.h b/libc/test/src/math/smoke/SubTest.h
new file mode 100644
index 0000000000000..a4b3822aca43c
--- /dev/null
+++ b/libc/test/src/math/smoke/SubTest.h
@@ -0,0 +1,158 @@
+//===-- Utility class to test
diff erent flavors of float sub ----*- 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_TEST_SRC_MATH_SMOKE_SUBTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_SUBTEST_H
+
+#include "hdr/fenv_macros.h"
+#include "src/__support/FPUtil/BasicOperations.h"
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+template <typename OutType, typename InType>
+class SubTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+ DECLARE_SPECIAL_CONSTANTS(OutType)
+
+ struct InConstants {
+ DECLARE_SPECIAL_CONSTANTS(InType)
+ };
+
+ using InFPBits = typename InConstants::FPBits;
+ using InStorageType = typename InConstants::StorageType;
+
+ InConstants in;
+
+public:
+ using SubFunc = OutType (*)(InType, InType);
+
+ void test_special_numbers(SubFunc func) {
+ EXPECT_FP_IS_NAN(func(aNaN, aNaN));
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(sNaN, sNaN), FE_INVALID);
+
+ InType qnan_42 = InFPBits::quiet_nan(Sign::POS, 0x42).get_val();
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_42, zero)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(zero, qnan_42)));
+
+ if constexpr (sizeof(OutType) < sizeof(InType)) {
+ InStorageType max_payload = InFPBits::FRACTION_MASK >> 1;
+ InType qnan_max = InFPBits::quiet_nan(Sign::POS, max_payload).get_val();
+ EXPECT_FP_EQ(zero,
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_max, zero)));
+ EXPECT_FP_EQ(zero,
+ LIBC_NAMESPACE::fputil::getpayload(func(zero, qnan_max)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_max, qnan_42)));
+ EXPECT_FP_EQ(InType(0x42.0p+0),
+ LIBC_NAMESPACE::fputil::getpayload(func(qnan_42, qnan_max)));
+ }
+
+ EXPECT_FP_EQ(inf, func(inf, zero));
+ EXPECT_FP_EQ(neg_inf, func(neg_inf, zero));
+ EXPECT_FP_EQ(inf, func(inf, neg_zero));
+ EXPECT_FP_EQ(neg_inf, func(neg_inf, neg_zero));
+ }
+
+ void test_invalid_operations(SubFunc func) {
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(inf, inf), FE_INVALID);
+ EXPECT_FP_IS_NAN_WITH_EXCEPTION(func(neg_inf, neg_inf), FE_INVALID);
+ }
+
+ void test_range_errors(SubFunc func) {
+ using namespace LIBC_NAMESPACE::fputil::testing;
+
+ if (ForceRoundingMode r(RoundingMode::Nearest); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(-inf, func(neg_max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero,
+ func(in.min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_zero,
+ func(in.neg_min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::TowardZero); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(max_normal, func(max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_max_normal,
+ func(neg_max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero,
+ func(in.min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_zero,
+ func(in.neg_min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::Downward); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(max_normal, func(max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_FP_EQ_WITH_EXCEPTION(-inf, func(neg_max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(zero,
+ func(in.min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_min_denormal,
+ func(in.neg_min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+
+ if (ForceRoundingMode r(RoundingMode::Upward); r.success) {
+ EXPECT_FP_EQ_WITH_EXCEPTION(inf, func(max_normal, neg_max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_max_normal,
+ func(neg_max_normal, max_normal),
+ FE_OVERFLOW | FE_INEXACT);
+
+ EXPECT_FP_EQ_WITH_EXCEPTION(min_denormal,
+ func(in.min_denormal, in.neg_min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ EXPECT_FP_EQ_WITH_EXCEPTION(neg_zero,
+ func(in.neg_min_denormal, in.min_denormal),
+ FE_UNDERFLOW | FE_INEXACT);
+ EXPECT_MATH_ERRNO(ERANGE);
+ }
+ }
+
+ void test_inexact_results(SubFunc func) {
+ func(InType(1.0), min_denormal);
+ EXPECT_FP_EXCEPTION(FE_INEXACT);
+ }
+};
+
+#define LIST_SUB_TESTS(OutType, InType, func) \
+ using LlvmLibcSubTest = SubTest<OutType, InType>; \
+ TEST_F(LlvmLibcSubTest, SpecialNumbers) { test_special_numbers(&func); } \
+ TEST_F(LlvmLibcSubTest, InvalidOperations) { \
+ test_invalid_operations(&func); \
+ } \
+ TEST_F(LlvmLibcSubTest, RangeErrors) { test_range_errors(&func); } \
+ TEST_F(LlvmLibcSubTest, InexactResults) { test_inexact_results(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_SUBTEST_H
diff --git a/libc/test/src/math/smoke/f16addf_test.cpp b/libc/test/src/math/smoke/f16addf_test.cpp
new file mode 100644
index 0000000000000..1e8b4323114ad
--- /dev/null
+++ b/libc/test/src/math/smoke/f16addf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for f16addf ---------------------------------------------===//
+//
+// 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 "AddTest.h"
+
+#include "src/math/f16addf.h"
+
+LIST_ADD_TESTS(float16, float, LIBC_NAMESPACE::f16addf)
diff --git a/libc/test/src/math/smoke/f16subf_test.cpp b/libc/test/src/math/smoke/f16subf_test.cpp
new file mode 100644
index 0000000000000..68ad9482ab1e4
--- /dev/null
+++ b/libc/test/src/math/smoke/f16subf_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for f16subf ---------------------------------------------===//
+//
+// 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 "SubTest.h"
+
+#include "src/math/f16subf.h"
+
+LIST_SUB_TESTS(float16, float, LIBC_NAMESPACE::f16subf)
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index c57cbe426425c..f0a653824bea2 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -185,6 +185,12 @@ class MPFRNumber {
return result;
}
+ MPFRNumber add(const MPFRNumber &b) const {
+ MPFRNumber result(*this);
+ mpfr_add(result.value, value, b.value, mpfr_rounding);
+ return result;
+ }
+
MPFRNumber asin() const {
MPFRNumber result(*this);
mpfr_asin(result.value, value, mpfr_rounding);
@@ -463,6 +469,12 @@ class MPFRNumber {
return result;
}
+ MPFRNumber sub(const MPFRNumber &b) const {
+ MPFRNumber result(*this);
+ mpfr_sub(result.value, value, b.value, mpfr_rounding);
+ return result;
+ }
+
MPFRNumber tan() const {
MPFRNumber result(*this);
mpfr_tan(result.value, value, mpfr_rounding);
@@ -734,6 +746,8 @@ binary_operation_one_output(Operation op, InputType x, InputType y,
MPFRNumber inputX(x, precision, rounding);
MPFRNumber inputY(y, precision, rounding);
switch (op) {
+ case Operation::Add:
+ return inputX.add(inputY);
case Operation::Atan2:
return inputX.atan2(inputY);
case Operation::Div:
@@ -744,6 +758,8 @@ binary_operation_one_output(Operation op, InputType x, InputType y,
return inputX.hypot(inputY);
case Operation::Pow:
return inputX.pow(inputY);
+ case Operation::Sub:
+ return inputX.sub(inputY);
case Operation::Fmul:
return inputX.fmul(inputY);
default:
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.h b/libc/utils/MPFRWrapper/MPFRUtils.h
index 743c06aa39286..213dc7a65c3bc 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.h
+++ b/libc/utils/MPFRWrapper/MPFRUtils.h
@@ -71,11 +71,13 @@ enum class Operation : int {
// input and produce a single floating point number of the same type as
// output.
BeginBinaryOperationsSingleOutput,
+ Add,
Atan2,
Div,
Fmod,
Hypot,
Pow,
+ Sub,
Fmul,
EndBinaryOperationsSingleOutput,
@@ -307,7 +309,8 @@ constexpr bool is_valid_operation() {
(op == Operation::Sqrt && cpp::is_floating_point_v<InputType> &&
cpp::is_floating_point_v<OutputType> &&
sizeof(OutputType) <= sizeof(InputType)) ||
- ((op == Operation::Div || op == Operation::Fmul) &&
+ (Operation::BeginBinaryOperationsSingleOutput < op &&
+ op < Operation::EndBinaryOperationsSingleOutput &&
internal::IsBinaryInput<InputType>::VALUE &&
cpp::is_floating_point_v<
typename internal::MakeScalarInput<InputType>::type> &&
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