[libc-commits] [libc] [libc][math][c23] Add MPFR unit tests for {ceil, floor, round, roundeven, trunc}f16 (PR #94383)
via libc-commits
libc-commits at lists.llvm.org
Wed Jun 5 06:03:30 PDT 2024
https://github.com/overmighty updated https://github.com/llvm/llvm-project/pull/94383
>From 3f198ac94279ef8962aac96e2949b5dc036c563f Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:14:22 +0200
Subject: [PATCH 1/9] [libc][math][c23] Add ceilf16 MPFR unit tests
---
libc/test/src/math/CMakeLists.txt | 18 ++++++++++++++++++
libc/test/src/math/CeilTest.h | 22 +++++++++++++---------
libc/test/src/math/ceilf16_test.cpp | 13 +++++++++++++
libc/utils/MPFRWrapper/MPFRUtils.cpp | 28 +++++++++++++++++++++++-----
4 files changed, 67 insertions(+), 14 deletions(-)
create mode 100644 libc/test/src/math/ceilf16_test.cpp
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index 102188c332e40..2c839774f98fc 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -183,6 +183,7 @@ add_fp_unittest(
CeilTest.h
DEPENDS
libc.src.math.ceil
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -197,6 +198,7 @@ add_fp_unittest(
CeilTest.h
DEPENDS
libc.src.math.ceilf
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -211,6 +213,22 @@ add_fp_unittest(
CeilTest.h
DEPENDS
libc.src.math.ceill
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.FPUtil.fp_bits
+)
+
+add_fp_unittest(
+ ceilf16_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ ceilf16_test.cpp
+ HDRS
+ CeilTest.h
+ DEPENDS
+ libc.src.math.ceilf16
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
diff --git a/libc/test/src/math/CeilTest.h b/libc/test/src/math/CeilTest.h
index b4c3752cc5c4b..2880b40cb80b7 100644
--- a/libc/test/src/math/CeilTest.h
+++ b/libc/test/src/math/CeilTest.h
@@ -6,6 +6,7 @@
//
//===----------------------------------------------------------------------===//
+#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
@@ -59,18 +60,21 @@ class CeilTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
EXPECT_FP_EQ(T(-10.0), func(T(-10.32)));
EXPECT_FP_EQ(T(11.0), func(T(10.65)));
EXPECT_FP_EQ(T(-10.0), func(T(-10.65)));
- EXPECT_FP_EQ(T(1235.0), func(T(1234.38)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.38)));
- EXPECT_FP_EQ(T(1235.0), func(T(1234.96)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.96)));
+ EXPECT_FP_EQ(T(124.0), func(T(123.38)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.38)));
+ EXPECT_FP_EQ(T(124.0), func(T(123.96)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.96)));
}
void testRange(CeilFunc func) {
- 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))
+ constexpr int COUNT = 100'000;
+ constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
+ static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
+ StorageType v = 0;
+ for (int i = 0; i <= COUNT; ++i, v += STEP) {
+ FPBits xbits(v);
+ T x = xbits.get_val();
+ if (xbits.is_inf_or_nan())
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Ceil, x, func(x), 0.0);
diff --git a/libc/test/src/math/ceilf16_test.cpp b/libc/test/src/math/ceilf16_test.cpp
new file mode 100644
index 0000000000000..a6ec922836a75
--- /dev/null
+++ b/libc/test/src/math/ceilf16_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for ceilf16 ---------------------------------------------===//
+//
+// 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 "CeilTest.h"
+
+#include "src/math/ceilf16.h"
+
+LIST_CEIL_TESTS(float16, LIBC_NAMESPACE::ceilf16)
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index 18a8ac044a9bb..1e7467c8abbdf 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -12,6 +12,7 @@
#include "src/__support/CPP/string_view.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/FPUtil/fpbits_str.h"
+#include "src/__support/macros/properties/types.h"
#include "test/UnitTest/FPMatcher.h"
#include "hdr/math_macros.h"
@@ -30,6 +31,10 @@ namespace mpfr {
// precision compared to the floating point precision.
template <typename T> struct ExtraPrecision;
+template <> struct ExtraPrecision<float16> {
+ static constexpr unsigned int VALUE = 128;
+};
+
template <> struct ExtraPrecision<float> {
static constexpr unsigned int VALUE = 128;
};
@@ -85,9 +90,12 @@ class MPFRNumber {
// We use explicit EnableIf specializations to disallow implicit
// conversions. Implicit conversions can potentially lead to loss of
- // precision.
- template <typename XType,
- cpp::enable_if_t<cpp::is_same_v<float, XType>, int> = 0>
+ // precision. We exceptionally allow implicit conversions from float16
+ // to float, as the MPFR API does not support float16, thus requiring
+ // conversion to a higher-precision format.
+ template <typename XType, cpp::enable_if_t<cpp::is_same_v<float, XType> ||
+ cpp::is_same_v<float16, XType>,
+ int> = 0>
explicit MPFRNumber(XType x,
unsigned int precision = ExtraPrecision<XType>::VALUE,
RoundingMode rounding = RoundingMode::Nearest)
@@ -529,8 +537,9 @@ class MPFRNumber {
// If the control reaches here, it means that this number and input are
// of the same sign but different exponent. In such a case, ULP error is
// calculated as sum of two parts.
- thisAsT = std::abs(thisAsT);
- input = std::abs(input);
+ using U = cpp::conditional_t<cpp::is_same_v<T, float16>, float, T>;
+ thisAsT = std::abs(static_cast<U>(thisAsT));
+ input = std::abs(static_cast<U>(input));
T min = thisAsT > input ? input : thisAsT;
T max = thisAsT > input ? thisAsT : input;
int minExponent = FPBits<T>(min).get_exponent();
@@ -585,6 +594,10 @@ template <> long double MPFRNumber::as<long double>() const {
return mpfr_get_ld(value, mpfr_rounding);
}
+template <> float16 MPFRNumber::as<float16>() const {
+ return static_cast<float16>(mpfr_get_flt(value, mpfr_rounding));
+}
+
namespace internal {
template <typename InputType>
@@ -763,6 +776,8 @@ template void explain_unary_operation_single_output_error<double>(
Operation op, double, double, double, RoundingMode);
template void explain_unary_operation_single_output_error<long double>(
Operation op, long double, long double, double, RoundingMode);
+template void explain_unary_operation_single_output_error<float16>(
+ Operation op, float16, float16, double, RoundingMode);
template <typename T>
void explain_unary_operation_two_outputs_error(
@@ -942,6 +957,9 @@ template bool compare_unary_operation_single_output<double>(Operation, double,
RoundingMode);
template bool compare_unary_operation_single_output<long double>(
Operation, long double, long double, double, RoundingMode);
+template bool compare_unary_operation_single_output<float16>(Operation, float16,
+ float16, double,
+ RoundingMode);
template <typename T>
bool compare_unary_operation_two_outputs(Operation op, T input,
>From eeeb16ebbda5760ef6398abcd0087af59e373835 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:20:18 +0200
Subject: [PATCH 2/9] [libc][math][c23] Add floorf16 MPFR unit tests
---
libc/test/src/math/CMakeLists.txt | 18 ++++++++++++++++++
libc/test/src/math/FloorTest.h | 22 +++++++++++++---------
libc/test/src/math/floorf16_test.cpp | 13 +++++++++++++
3 files changed, 44 insertions(+), 9 deletions(-)
create mode 100644 libc/test/src/math/floorf16_test.cpp
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index 2c839774f98fc..703bfbc728890 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -243,6 +243,7 @@ add_fp_unittest(
FloorTest.h
DEPENDS
libc.src.math.floor
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -257,6 +258,7 @@ add_fp_unittest(
FloorTest.h
DEPENDS
libc.src.math.floorf
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -271,6 +273,22 @@ add_fp_unittest(
FloorTest.h
DEPENDS
libc.src.math.floorl
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.FPUtil.fp_bits
+)
+
+add_fp_unittest(
+ floorf16_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ floorf16_test.cpp
+ HDRS
+ FloorTest.h
+ DEPENDS
+ libc.src.math.floorf16
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
diff --git a/libc/test/src/math/FloorTest.h b/libc/test/src/math/FloorTest.h
index 9103a5b05eb5a..cce0c731ebbc0 100644
--- a/libc/test/src/math/FloorTest.h
+++ b/libc/test/src/math/FloorTest.h
@@ -9,6 +9,7 @@
#ifndef LLVM_LIBC_TEST_SRC_MATH_FLOORTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_FLOORTEST_H
+#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
@@ -62,18 +63,21 @@ class FloorTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
EXPECT_FP_EQ(T(-11.0), func(T(-10.32)));
EXPECT_FP_EQ(T(10.0), func(T(10.65)));
EXPECT_FP_EQ(T(-11.0), func(T(-10.65)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.38)));
- EXPECT_FP_EQ(T(-1235.0), func(T(-1234.38)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.96)));
- EXPECT_FP_EQ(T(-1235.0), func(T(-1234.96)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.38)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-123.38)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.96)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-123.96)));
}
void testRange(FloorFunc func) {
- 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))
+ constexpr int COUNT = 100'000;
+ constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
+ static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
+ StorageType v = 0;
+ for (int i = 0; i <= COUNT; ++i, v += STEP) {
+ FPBits xbits(v);
+ T x = xbits.get_val();
+ if (xbits.is_inf_or_nan())
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Floor, x, func(x), 0.0);
diff --git a/libc/test/src/math/floorf16_test.cpp b/libc/test/src/math/floorf16_test.cpp
new file mode 100644
index 0000000000000..ca5160e927035
--- /dev/null
+++ b/libc/test/src/math/floorf16_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for floorf16 --------------------------------------------===//
+//
+// 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 "FloorTest.h"
+
+#include "src/math/floorf16.h"
+
+LIST_FLOOR_TESTS(float16, LIBC_NAMESPACE::floorf16)
>From 2d4aa54d5c9e792e820c11ae1d9edc99634f89e7 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:23:56 +0200
Subject: [PATCH 3/9] [libc][math][c23] Add roundf16 MPFR unit tests
---
libc/test/src/math/CMakeLists.txt | 18 ++++++++++++++++++
libc/test/src/math/RoundTest.h | 22 +++++++++++++---------
libc/test/src/math/roundf16_test.cpp | 13 +++++++++++++
3 files changed, 44 insertions(+), 9 deletions(-)
create mode 100644 libc/test/src/math/roundf16_test.cpp
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index 703bfbc728890..aab5c895e01b6 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -303,6 +303,7 @@ add_fp_unittest(
RoundTest.h
DEPENDS
libc.src.math.round
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -317,6 +318,7 @@ add_fp_unittest(
RoundTest.h
DEPENDS
libc.src.math.roundf
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -331,6 +333,22 @@ add_fp_unittest(
RoundTest.h
DEPENDS
libc.src.math.roundl
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.FPUtil.fp_bits
+)
+
+add_fp_unittest(
+ roundf16_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ roundf16_test.cpp
+ HDRS
+ RoundTest.h
+ DEPENDS
+ libc.src.math.roundf16
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
diff --git a/libc/test/src/math/RoundTest.h b/libc/test/src/math/RoundTest.h
index 2a31df305ac38..d571d5d8feed4 100644
--- a/libc/test/src/math/RoundTest.h
+++ b/libc/test/src/math/RoundTest.h
@@ -9,6 +9,7 @@
#ifndef LLVM_LIBC_TEST_SRC_MATH_ROUNDTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_ROUNDTEST_H
+#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
@@ -62,18 +63,21 @@ class RoundTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
EXPECT_FP_EQ(T(-10.0), func(T(-10.32)));
EXPECT_FP_EQ(T(11.0), func(T(10.65)));
EXPECT_FP_EQ(T(-11.0), func(T(-10.65)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.38)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.38)));
- EXPECT_FP_EQ(T(1235.0), func(T(1234.96)));
- EXPECT_FP_EQ(T(-1235.0), func(T(-1234.96)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.38)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.38)));
+ EXPECT_FP_EQ(T(124.0), func(T(123.96)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-123.96)));
}
void testRange(RoundFunc func) {
- 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))
+ constexpr int COUNT = 100'000;
+ constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
+ static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
+ StorageType v = 0;
+ for (int i = 0; i <= COUNT; ++i, v += STEP) {
+ FPBits xbits(v);
+ T x = xbits.get_val();
+ if (xbits.is_inf_or_nan())
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Round, x, func(x), 0.0);
diff --git a/libc/test/src/math/roundf16_test.cpp b/libc/test/src/math/roundf16_test.cpp
new file mode 100644
index 0000000000000..54ead855934db
--- /dev/null
+++ b/libc/test/src/math/roundf16_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for roundf16 --------------------------------------------===//
+//
+// 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 "RoundTest.h"
+
+#include "src/math/roundf16.h"
+
+LIST_ROUND_TESTS(float16, LIBC_NAMESPACE::roundf16)
>From df553b38669e7dbbc46ead097db65a036851235d Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:28:01 +0200
Subject: [PATCH 4/9] [libc][math][c23] Add roundevenf16 MPFR unit tests
---
libc/test/src/math/CMakeLists.txt | 18 ++++++++++++++
libc/test/src/math/RoundEvenTest.h | 30 ++++++++++++++----------
libc/test/src/math/roundevenf16_test.cpp | 13 ++++++++++
3 files changed, 48 insertions(+), 13 deletions(-)
create mode 100644 libc/test/src/math/roundevenf16_test.cpp
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index aab5c895e01b6..d93a81f2173af 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -363,6 +363,7 @@ add_fp_unittest(
RoundEvenTest.h
DEPENDS
libc.src.math.roundeven
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -377,6 +378,7 @@ add_fp_unittest(
RoundEvenTest.h
DEPENDS
libc.src.math.roundevenf
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -391,6 +393,22 @@ add_fp_unittest(
RoundEvenTest.h
DEPENDS
libc.src.math.roundevenl
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.FPUtil.fp_bits
+)
+
+add_fp_unittest(
+ roundevenf16_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ roundevenf16_test.cpp
+ HDRS
+ RoundEvenTest.h
+ DEPENDS
+ libc.src.math.roundevenf16
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
diff --git a/libc/test/src/math/RoundEvenTest.h b/libc/test/src/math/RoundEvenTest.h
index d70555d347659..5ecda66ccb588 100644
--- a/libc/test/src/math/RoundEvenTest.h
+++ b/libc/test/src/math/RoundEvenTest.h
@@ -9,6 +9,7 @@
#ifndef LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H
+#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
@@ -60,22 +61,25 @@ class RoundEvenTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
EXPECT_FP_EQ(T(-2.0), func(T(-1.75)));
EXPECT_FP_EQ(T(11.0), func(T(10.65)));
EXPECT_FP_EQ(T(-11.0), func(T(-10.65)));
- EXPECT_FP_EQ(T(1233.0), func(T(1233.25)));
- EXPECT_FP_EQ(T(1234.0), func(T(1233.50)));
- EXPECT_FP_EQ(T(1234.0), func(T(1233.75)));
- EXPECT_FP_EQ(T(-1233.0), func(T(-1233.25)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1233.50)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1233.75)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.50)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.50)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.25)));
+ EXPECT_FP_EQ(T(124.0), func(T(123.50)));
+ EXPECT_FP_EQ(T(124.0), func(T(123.75)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.25)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-123.50)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-123.75)));
+ EXPECT_FP_EQ(T(124.0), func(T(124.50)));
+ EXPECT_FP_EQ(T(-124.0), func(T(-124.50)));
}
void testRange(RoundEvenFunc func) {
- 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))
+ constexpr int COUNT = 100'000;
+ constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
+ static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
+ StorageType v = 0;
+ for (int i = 0; i <= COUNT; ++i, v += STEP) {
+ FPBits xbits(v);
+ T x = xbits.get_val();
+ if (xbits.is_inf_or_nan())
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::RoundEven, x, func(x), 0.0);
diff --git a/libc/test/src/math/roundevenf16_test.cpp b/libc/test/src/math/roundevenf16_test.cpp
new file mode 100644
index 0000000000000..911a32c9f73f4
--- /dev/null
+++ b/libc/test/src/math/roundevenf16_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for roundevenf16 ----------------------------------------===//
+//
+// 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 "RoundEvenTest.h"
+
+#include "src/math/roundevenf16.h"
+
+LIST_ROUNDEVEN_TESTS(float16, LIBC_NAMESPACE::roundevenf16)
>From f8799a298b13a89e6a4f52eaa006086179d51349 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:32:27 +0200
Subject: [PATCH 5/9] [libc][math][c23] Fix missing header guard in CeilTest.h
---
libc/test/src/math/CeilTest.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libc/test/src/math/CeilTest.h b/libc/test/src/math/CeilTest.h
index 2880b40cb80b7..3af87420a739f 100644
--- a/libc/test/src/math/CeilTest.h
+++ b/libc/test/src/math/CeilTest.h
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+#ifndef LLVM_LIBC_TEST_SRC_MATH_CEILTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_CEILTEST_H
+
#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
@@ -88,3 +91,5 @@ class CeilTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
TEST_F(LlvmLibcCeilTest, RoundedNubmers) { testRoundedNumbers(&func); } \
TEST_F(LlvmLibcCeilTest, Fractions) { testFractions(&func); } \
TEST_F(LlvmLibcCeilTest, Range) { testRange(&func); }
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_CEILTEST_H
>From 89cf40df72b013375d4d54d353953cd097f91524 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Tue, 4 Jun 2024 19:36:18 +0200
Subject: [PATCH 6/9] [libc][math][c23] Add truncf16 MPFR unit tests
---
libc/test/src/math/CMakeLists.txt | 18 ++++++++++++++++++
libc/test/src/math/TruncTest.h | 22 +++++++++++++---------
libc/test/src/math/truncf16_test.cpp | 13 +++++++++++++
3 files changed, 44 insertions(+), 9 deletions(-)
create mode 100644 libc/test/src/math/truncf16_test.cpp
diff --git a/libc/test/src/math/CMakeLists.txt b/libc/test/src/math/CMakeLists.txt
index d93a81f2173af..e4a3087c9055f 100644
--- a/libc/test/src/math/CMakeLists.txt
+++ b/libc/test/src/math/CMakeLists.txt
@@ -141,6 +141,7 @@ add_fp_unittest(
TruncTest.h
DEPENDS
libc.src.math.trunc
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -155,6 +156,7 @@ add_fp_unittest(
TruncTest.h
DEPENDS
libc.src.math.truncf
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
@@ -169,6 +171,22 @@ add_fp_unittest(
TruncTest.h
DEPENDS
libc.src.math.truncl
+ libc.src.__support.CPP.algorithm
+ libc.src.__support.FPUtil.fp_bits
+)
+
+add_fp_unittest(
+ truncf16_test
+ NEED_MPFR
+ SUITE
+ libc-math-unittests
+ SRCS
+ truncf16_test.cpp
+ HDRS
+ TruncTest.h
+ DEPENDS
+ libc.src.math.truncf16
+ libc.src.__support.CPP.algorithm
libc.src.__support.FPUtil.fp_bits
)
diff --git a/libc/test/src/math/TruncTest.h b/libc/test/src/math/TruncTest.h
index bc5b76131291b..76c9740a917bf 100644
--- a/libc/test/src/math/TruncTest.h
+++ b/libc/test/src/math/TruncTest.h
@@ -9,6 +9,7 @@
#ifndef LLVM_LIBC_TEST_SRC_MATH_TRUNCTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_TRUNCTEST_H
+#include "src/__support/CPP/algorithm.h"
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
@@ -62,18 +63,21 @@ class TruncTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
EXPECT_FP_EQ(T(-10.0), func(T(-10.32)));
EXPECT_FP_EQ(T(10.0), func(T(10.65)));
EXPECT_FP_EQ(T(-10.0), func(T(-10.65)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.38)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.38)));
- EXPECT_FP_EQ(T(1234.0), func(T(1234.96)));
- EXPECT_FP_EQ(T(-1234.0), func(T(-1234.96)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.38)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.38)));
+ EXPECT_FP_EQ(T(123.0), func(T(123.96)));
+ EXPECT_FP_EQ(T(-123.0), func(T(-123.96)));
}
void testRange(TruncFunc func) {
- 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))
+ constexpr int COUNT = 100'000;
+ constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(
+ static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));
+ StorageType v = 0;
+ for (int i = 0; i <= COUNT; ++i, v += STEP) {
+ FPBits xbits(v);
+ T x = xbits.get_val();
+ if (xbits.is_inf_or_nan())
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Trunc, x, func(x), 0.0);
diff --git a/libc/test/src/math/truncf16_test.cpp b/libc/test/src/math/truncf16_test.cpp
new file mode 100644
index 0000000000000..832d88ec84f8e
--- /dev/null
+++ b/libc/test/src/math/truncf16_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for truncf16 --------------------------------------------===//
+//
+// 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 "TruncTest.h"
+
+#include "src/math/truncf16.h"
+
+LIST_TRUNC_TESTS(float16, LIBC_NAMESPACE::truncf16)
>From 3f6df4cc0e33750217189b5d379c42b0f63b3914 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Wed, 5 Jun 2024 14:47:48 +0200
Subject: [PATCH 7/9] [libc][math][c23] Improve MPFRNumber::as<float16>()
---
libc/utils/MPFRWrapper/MPFRUtils.cpp | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index 1e7467c8abbdf..4aa6ff77a4f69 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -595,7 +595,9 @@ template <> long double MPFRNumber::as<long double>() const {
}
template <> float16 MPFRNumber::as<float16>() const {
- return static_cast<float16>(mpfr_get_flt(value, mpfr_rounding));
+ // TODO: Either prove that this cast won't cause double-rounding errors, or
+ // find a better way to get a float16.
+ return static_cast<float16>(mpfr_get_d(value, mpfr_rounding));
}
namespace internal {
>From d66fadf763143fde375e59360a0bbe4da8876904 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Wed, 5 Jun 2024 14:58:21 +0200
Subject: [PATCH 8/9] [libc][math][c23] Guard usage of float16 in MPFRUtils.cpp
---
libc/utils/MPFRWrapper/MPFRUtils.cpp | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index 4aa6ff77a4f69..69b6055ed522c 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -31,9 +31,11 @@ namespace mpfr {
// precision compared to the floating point precision.
template <typename T> struct ExtraPrecision;
+#ifdef LIBC_TYPES_HAS_FLOAT16
template <> struct ExtraPrecision<float16> {
static constexpr unsigned int VALUE = 128;
};
+#endif
template <> struct ExtraPrecision<float> {
static constexpr unsigned int VALUE = 128;
@@ -93,9 +95,13 @@ class MPFRNumber {
// precision. We exceptionally allow implicit conversions from float16
// to float, as the MPFR API does not support float16, thus requiring
// conversion to a higher-precision format.
- template <typename XType, cpp::enable_if_t<cpp::is_same_v<float, XType> ||
- cpp::is_same_v<float16, XType>,
- int> = 0>
+ template <typename XType,
+ cpp::enable_if_t<cpp::is_same_v<float, XType>
+#ifdef LIBC_TYPES_HAS_FLOAT16
+ || cpp::is_same_v<float16, XType>
+#endif
+ ,
+ int> = 0>
explicit MPFRNumber(XType x,
unsigned int precision = ExtraPrecision<XType>::VALUE,
RoundingMode rounding = RoundingMode::Nearest)
@@ -537,7 +543,11 @@ class MPFRNumber {
// If the control reaches here, it means that this number and input are
// of the same sign but different exponent. In such a case, ULP error is
// calculated as sum of two parts.
+#ifdef LIBC_TYPES_HAS_FLOAT16
using U = cpp::conditional_t<cpp::is_same_v<T, float16>, float, T>;
+#else
+ using U = T;
+#endif
thisAsT = std::abs(static_cast<U>(thisAsT));
input = std::abs(static_cast<U>(input));
T min = thisAsT > input ? input : thisAsT;
@@ -594,11 +604,13 @@ template <> long double MPFRNumber::as<long double>() const {
return mpfr_get_ld(value, mpfr_rounding);
}
+#ifdef LIBC_TYPES_HAS_FLOAT16
template <> float16 MPFRNumber::as<float16>() const {
// TODO: Either prove that this cast won't cause double-rounding errors, or
// find a better way to get a float16.
return static_cast<float16>(mpfr_get_d(value, mpfr_rounding));
}
+#endif
namespace internal {
@@ -778,8 +790,10 @@ template void explain_unary_operation_single_output_error<double>(
Operation op, double, double, double, RoundingMode);
template void explain_unary_operation_single_output_error<long double>(
Operation op, long double, long double, double, RoundingMode);
+#ifdef LIBC_TYPES_HAS_FLOAT16
template void explain_unary_operation_single_output_error<float16>(
Operation op, float16, float16, double, RoundingMode);
+#endif
template <typename T>
void explain_unary_operation_two_outputs_error(
@@ -959,9 +973,11 @@ template bool compare_unary_operation_single_output<double>(Operation, double,
RoundingMode);
template bool compare_unary_operation_single_output<long double>(
Operation, long double, long double, double, RoundingMode);
+#ifdef LIBC_TYPES_HAS_FLOAT16
template bool compare_unary_operation_single_output<float16>(Operation, float16,
float16, double,
RoundingMode);
+#endif
template <typename T>
bool compare_unary_operation_two_outputs(Operation op, T input,
>From 0014e07b17cc5682b4d8be8fffcc0409a08aedd2 Mon Sep 17 00:00:00 2001
From: OverMighty <its.overmighty at gmail.com>
Date: Wed, 5 Jun 2024 15:03:08 +0200
Subject: [PATCH 9/9] [libc][math][c23] Add TODO about std::abs currently not
supporting float16
---
libc/utils/MPFRWrapper/MPFRUtils.cpp | 1 +
1 file changed, 1 insertion(+)
diff --git a/libc/utils/MPFRWrapper/MPFRUtils.cpp b/libc/utils/MPFRWrapper/MPFRUtils.cpp
index 69b6055ed522c..56fcb4b989ae0 100644
--- a/libc/utils/MPFRWrapper/MPFRUtils.cpp
+++ b/libc/utils/MPFRWrapper/MPFRUtils.cpp
@@ -544,6 +544,7 @@ class MPFRNumber {
// of the same sign but different exponent. In such a case, ULP error is
// calculated as sum of two parts.
#ifdef LIBC_TYPES_HAS_FLOAT16
+ // TODO: This will no longer be needed once std::abs supports float16.
using U = cpp::conditional_t<cpp::is_same_v<T, float16>, float, T>;
#else
using U = T;
More information about the libc-commits
mailing list