[libc-commits] [libc] [libc][stdfix] Initial support for stdfix.h and fixed point arithmetic. (PR #81201)
via libc-commits
libc-commits at lists.llvm.org
Thu Feb 8 20:45:52 PST 2024
https://github.com/lntue updated https://github.com/llvm/llvm-project/pull/81201
>From b154a984f375c1c86dd7dae6e6df1e83433f9446 Mon Sep 17 00:00:00 2001
From: Tue Ly <lntue.h at gmail.com>
Date: Fri, 9 Feb 2024 04:45:17 +0000
Subject: [PATCH] [libc][stdfix] Initial support for stdfix.h and fixed-point
arithmetic.
---
.../cmake/modules/CheckCompilerFeatures.cmake | 12 +-
libc/cmake/modules/LLVMLibCObjectRules.cmake | 4 +
.../compiler_features/check_fixedpoint.cpp | 5 +
libc/config/linux/x86_64/entrypoints.txt | 12 +
libc/include/CMakeLists.txt | 9 +
libc/include/llvm-libc-macros/CMakeLists.txt | 6 +
libc/include/llvm-libc-macros/stdfix-macros.h | 349 ++++++++++++++++++
libc/include/llvm-libc-types/CMakeLists.txt | 7 +
libc/include/llvm-libc-types/stdfix_types.h | 19 +
libc/include/stdfix.h.def | 21 ++
libc/spec/spec.td | 16 +
libc/spec/stdc.td | 18 +
libc/src/CMakeLists.txt | 1 +
libc/src/__support/CMakeLists.txt | 2 +
libc/src/__support/CPP/CMakeLists.txt | 1 +
libc/src/__support/CPP/type_traits.h | 1 +
.../CPP/type_traits/is_fixed_point.h | 44 +++
libc/src/__support/fixedpoint/CMakeLists.txt | 21 ++
libc/src/__support/fixedpoint/fxbits.h | 38 ++
libc/src/__support/fixedpoint/fxrep.h | 158 ++++++++
libc/src/stdfix/CMakeLists.txt | 18 +
libc/src/stdfix/abshk.cpp | 19 +
libc/src/stdfix/abshk.h | 20 +
libc/src/stdfix/abshr.cpp | 19 +
libc/src/stdfix/abshr.h | 20 +
libc/src/stdfix/absk.cpp | 17 +
libc/src/stdfix/absk.h | 20 +
libc/src/stdfix/abslk.cpp | 19 +
libc/src/stdfix/abslk.h | 20 +
libc/src/stdfix/abslr.cpp | 19 +
libc/src/stdfix/abslr.h | 20 +
libc/src/stdfix/absr.cpp | 17 +
libc/src/stdfix/absr.h | 20 +
libc/test/UnitTest/CMakeLists.txt | 3 +
libc/test/UnitTest/LibcTest.cpp | 164 ++++----
libc/test/UnitTest/LibcTest.h | 4 +-
libc/test/src/CMakeLists.txt | 1 +
libc/test/src/stdfix/AbsTest.h | 37 ++
libc/test/src/stdfix/CMakeLists.txt | 23 ++
libc/test/src/stdfix/abshk_test.cpp | 13 +
libc/test/src/stdfix/abshr_test.cpp | 13 +
libc/test/src/stdfix/absk_test.cpp | 13 +
libc/test/src/stdfix/abslk_test.cpp | 13 +
libc/test/src/stdfix/abslr_test.cpp | 13 +
libc/test/src/stdfix/absr_test.cpp | 13 +
45 files changed, 1219 insertions(+), 83 deletions(-)
create mode 100644 libc/cmake/modules/compiler_features/check_fixedpoint.cpp
create mode 100644 libc/include/llvm-libc-macros/stdfix-macros.h
create mode 100644 libc/include/llvm-libc-types/stdfix_types.h
create mode 100644 libc/include/stdfix.h.def
create mode 100644 libc/src/__support/CPP/type_traits/is_fixed_point.h
create mode 100644 libc/src/__support/fixedpoint/CMakeLists.txt
create mode 100644 libc/src/__support/fixedpoint/fxbits.h
create mode 100644 libc/src/__support/fixedpoint/fxrep.h
create mode 100644 libc/src/stdfix/CMakeLists.txt
create mode 100644 libc/src/stdfix/abshk.cpp
create mode 100644 libc/src/stdfix/abshk.h
create mode 100644 libc/src/stdfix/abshr.cpp
create mode 100644 libc/src/stdfix/abshr.h
create mode 100644 libc/src/stdfix/absk.cpp
create mode 100644 libc/src/stdfix/absk.h
create mode 100644 libc/src/stdfix/abslk.cpp
create mode 100644 libc/src/stdfix/abslk.h
create mode 100644 libc/src/stdfix/abslr.cpp
create mode 100644 libc/src/stdfix/abslr.h
create mode 100644 libc/src/stdfix/absr.cpp
create mode 100644 libc/src/stdfix/absr.h
create mode 100644 libc/test/src/stdfix/AbsTest.h
create mode 100644 libc/test/src/stdfix/CMakeLists.txt
create mode 100644 libc/test/src/stdfix/abshk_test.cpp
create mode 100644 libc/test/src/stdfix/abshr_test.cpp
create mode 100644 libc/test/src/stdfix/absk_test.cpp
create mode 100644 libc/test/src/stdfix/abslk_test.cpp
create mode 100644 libc/test/src/stdfix/abslr_test.cpp
create mode 100644 libc/test/src/stdfix/absr_test.cpp
diff --git a/libc/cmake/modules/CheckCompilerFeatures.cmake b/libc/cmake/modules/CheckCompilerFeatures.cmake
index 983ce86ab1b253..506a97d2fad874 100644
--- a/libc/cmake/modules/CheckCompilerFeatures.cmake
+++ b/libc/cmake/modules/CheckCompilerFeatures.cmake
@@ -3,7 +3,7 @@
# ------------------------------------------------------------------------------
# Initialize ALL_COMPILER_FEATURES as empty list.
-set(ALL_COMPILER_FEATURES "float128")
+set(ALL_COMPILER_FEATURES "float128" "fixedpoint")
# Making sure ALL_COMPILER_FEATURES is sorted.
list(SORT ALL_COMPILER_FEATURES)
@@ -42,16 +42,24 @@ set(AVAILABLE_COMPILER_FEATURES "")
# Try compile a C file to check if flag is supported.
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
foreach(feature IN LISTS ALL_COMPILER_FEATURES)
+ set(compile_options ${LIBC_COMPILE_OPTIONS_NATIVE})
+ if(${feature} STREQUAL "fixedpoint")
+ list(APPEND compiler_options "-ffixed-point")
+ endif()
+
try_compile(
has_feature
${CMAKE_CURRENT_BINARY_DIR}/compiler_features
SOURCES ${LIBC_SOURCE_DIR}/cmake/modules/compiler_features/check_${feature}.cpp
- COMPILE_DEFINITIONS -I${LIBC_SOURCE_DIR} ${LIBC_COMPILE_OPTIONS_NATIVE}
+ COMPILE_DEFINITIONS -I${LIBC_SOURCE_DIR} ${compiler_options}
)
+
if(has_feature)
list(APPEND AVAILABLE_COMPILER_FEATURES ${feature})
if(${feature} STREQUAL "float128")
set(LIBC_COMPILER_HAS_FLOAT128 TRUE)
+ elseif(${feature} STREQUAL "fixedpoint")
+ set(LIBC_COMPILER_HAS_FIXED_POINT TRUE)
endif()
endif()
endforeach()
diff --git a/libc/cmake/modules/LLVMLibCObjectRules.cmake b/libc/cmake/modules/LLVMLibCObjectRules.cmake
index 70e64a6cb1ae2a..c11c72f23f64fa 100644
--- a/libc/cmake/modules/LLVMLibCObjectRules.cmake
+++ b/libc/cmake/modules/LLVMLibCObjectRules.cmake
@@ -44,6 +44,10 @@ function(_get_common_compile_options output_var flags)
if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
list(APPEND compile_options "-fpie")
+ if(LIBC_COMPILER_HAS_FIXED_POINT)
+ list(APPEND compile_options "-ffixed-point")
+ endif()
+
if(LLVM_LIBC_FULL_BUILD)
# Only add -ffreestanding flag in full build mode.
list(APPEND compile_options "-ffreestanding")
diff --git a/libc/cmake/modules/compiler_features/check_fixedpoint.cpp b/libc/cmake/modules/compiler_features/check_fixedpoint.cpp
new file mode 100644
index 00000000000000..f9711ff8cec0a7
--- /dev/null
+++ b/libc/cmake/modules/compiler_features/check_fixedpoint.cpp
@@ -0,0 +1,5 @@
+#include "include/llvm-libc-types/stdfix_types.h"
+
+#ifndef LIBC_COMPILER_HAS_FIXED_POINT
+#error unsupported
+#endif
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index b35fc9fc6866b4..5fea05df087b8c 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -419,6 +419,18 @@ if(LIBC_COMPILER_HAS_FLOAT128)
)
endif()
+if(LIBC_COMPILER_HAS_FIXED_POINT)
+ list(APPEND TARGET_LIBM_ENTRYPOINTS
+ # stdfix.h N1169 _Fract and _Accum entrypoints
+ libc.src.stdfix.abshk
+ libc.src.stdfix.abshr
+ libc.src.stdfix.absk
+ libc.src.stdfix.absr
+ libc.src.stdfix.abslk
+ libc.src.stdfix.abslr
+ )
+endif()
+
if(LLVM_LIBC_FULL_BUILD)
list(APPEND TARGET_LIBC_ENTRYPOINTS
# assert.h entrypoints
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index 332410453b54d1..be21ac19840440 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -104,6 +104,15 @@ add_gen_header(
.llvm-libc-types.float128
)
+add_gen_header(
+ stdfix
+ DEF_FILE stdfix.h.def
+ GEN_HDR stdfix.h
+ DEPENDS
+ .llvm-libc-macros.stdfix_macros
+ .llvm-libc-types.stdfix_types
+)
+
# TODO: This should be conditional on POSIX networking being included.
file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/arpa)
diff --git a/libc/include/llvm-libc-macros/CMakeLists.txt b/libc/include/llvm-libc-macros/CMakeLists.txt
index 562769a5e84cef..225885d3a9b085 100644
--- a/libc/include/llvm-libc-macros/CMakeLists.txt
+++ b/libc/include/llvm-libc-macros/CMakeLists.txt
@@ -227,3 +227,9 @@ add_macro_header(
HDR
inttypes-macros.h
)
+
+add_macro_header(
+ stdfix_macros
+ HDR
+ stdfix-macros.h
+)
diff --git a/libc/include/llvm-libc-macros/stdfix-macros.h b/libc/include/llvm-libc-macros/stdfix-macros.h
new file mode 100644
index 00000000000000..cfedf2dfd1330d
--- /dev/null
+++ b/libc/include/llvm-libc-macros/stdfix-macros.h
@@ -0,0 +1,349 @@
+//===-- Definitions from stdfix.h -----------------------------------------===//
+//
+// 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_MACROS_STDFIX_MACROS_H
+#define __LLVM_LIBC_MACROS_STDFIX_MACROS_H
+
+#ifdef __clang__
+#if (!defined(__cplusplus) || (__clang_major__ >= 18))
+// _Fract and _Accum types are avaiable
+#define LIBC_COMPILER_HAS_FIXED_POINT
+#endif // __cplusplus
+#endif // __clang__
+
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+
+// Default values: from N1169 standard - Annex A.3 - Typical desktop processor.
+
+#ifdef __SFRACT_FBIT__
+#define SFRACT_FBIT __SFRACT_FBIT__
+#else
+#define SFRACT_FBIT 7
+#endif // SFRACT_FBIT
+
+#ifdef __SFRACT_MIN__
+#define SFRACT_MIN __SFRACT_MIN__
+#else
+#define SFRACT_MIN (-0.5HR - 0.5HR)
+#endif // SFRACT_MIN
+
+#ifdef __SFRACT_MAX__
+#define SFRACT_MAX __SFRACT_MAX__
+#else
+#define SFRACT_MAX 0x1.FCp-1HR
+#endif // SFRACT_MAX
+
+#ifdef __SFRACT_EPSILON__
+#define SFRACT_EPSILON __SFRACT_EPSILON__
+#else
+#define SFRACT_EPSILON 0x1.0p-7HR
+#endif // SFRACT_EPSILON
+
+#ifdef __USFRACT_FBIT__
+#define USFRACT_FBIT __USFRACT_FBIT__
+#else
+#define USFRACT_FBIT 8
+#endif // USFRACT_FBIT
+
+#ifdef __USFRACT_MIN__
+#define USFRACT_MIN __USFRACT_MIN__
+#else
+#define USFRACT_MIN 0.0UHR
+#endif // USFRACT_MIN
+
+#ifdef __USFRACT_MAX__
+#define USFRACT_MAX __USFRACT_MAX__
+#else
+#define USFRACT_MAX 0x1.FEp-1UHR
+#endif // USFRACT_MAX
+
+#ifdef __USFRACT_EPSILON__
+#define USFRACT_EPSILON __USFRACT_EPSILON__
+#else
+#define USFRACT_EPSILON 0x1.0p-8UHR
+#endif // USFRACT_EPSILON
+
+#ifdef __FRACT_FBIT__
+#define FRACT_FBIT __FRACT_FBIT__
+#else
+#define FRACT_FBIT 15
+#endif // FRACT_FBIT
+
+#ifdef __FRACT_MIN__
+#define FRACT_MIN __FRACT_MIN__
+#else
+#define FRACT_MIN (-0.5R - 0.5R)
+#endif // FRACT_MIN
+
+#ifdef __FRACT_MAX__
+#define FRACT_MAX __FRACT_MAX__
+#else
+#define FRACT_MAX 0x1.FFFCp-1R
+#endif // FRACT_MAX
+
+#ifdef __FRACT_EPSILON__
+#define FRACT_EPSILON __FRACT_EPSILON__
+#else
+#define FRACT_EPSILON 0x1.0p-15R
+#endif // FRACT_EPSILON
+
+#ifdef __UFRACT_FBIT__
+#define UFRACT_FBIT __UFRACT_FBIT__
+#else
+#define UFRACT_FBIT 16
+#endif // UFRACT_FBIT
+
+#ifdef __UFRACT_MIN__
+#define UFRACT_MIN __UFRACT_MIN__
+#else
+#define UFRACT_MIN 0.0UR
+#endif // UFRACT_MIN
+
+#ifdef __UFRACT_MAX__
+#define UFRACT_MAX __UFRACT_MAX__
+#else
+#define UFRACT_MAX 0x1.FFFEp-1UR
+#endif // UFRACT_MAX
+
+#ifdef __UFRACT_EPSILON__
+#define UFRACT_EPSILON __UFRACT_EPSILON__
+#else
+#define UFRACT_EPSILON 0x1.0p-16UR
+#endif // UFRACT_EPSILON
+
+#ifdef __LFRACT_FBIT__
+#define LFRACT_FBIT __LFRACT_FBIT__
+#else
+#define LFRACT_FBIT 31
+#endif // LFRACT_FBIT
+
+#ifdef __LFRACT_MIN__
+#define LFRACT_MIN __LFRACT_MIN__
+#else
+#define LFRACT_MIN (-0.5LR - 0.5LR)
+#endif // LFRACT_MIN
+
+#ifdef __LFRACT_MAX__
+#define LFRACT_MAX __LFRACT_MAX__
+#else
+#define LFRACT_MAX 0x1.FFFFFFFCp-1LR
+#endif // LFRACT_MAX
+
+#ifdef __LFRACT_EPSILON__
+#define LFRACT_EPSILON __LFRACT_EPSILON__
+#else
+#define LFRACT_EPSILON 0x1.0p-31LR
+#endif // LFRACT_EPSILON
+
+#ifdef __ULFRACT_FBIT__
+#define ULFRACT_FBIT __ULFRACT_FBIT__
+#else
+#define ULFRACT_FBIT 32
+#endif // ULFRACT_FBIT
+
+#ifdef __ULFRACT_MIN__
+#define ULFRACT_MIN __ULFRACT_MIN__
+#else
+#define ULFRACT_MIN 0.0ULR
+#endif // ULFRACT_MIN
+
+#ifdef __ULFRACT_MAX__
+#define ULFRACT_MAX __ULFRACT_MAX__
+#else
+#define ULFRACT_MAX 0x1.FFFFFFFEp-1ULR
+#endif // ULFRACT_MAX
+
+#ifdef __ULFRACT_EPSILON__
+#define ULFRACT_EPSILON __ULFRACT_EPSILON__
+#else
+#define ULFRACT_EPSILON 0x1.0p-32ULR
+#endif // ULFRACT_EPSILON
+
+#ifdef __SACCUM_FBIT__
+#define SACCUM_FBIT __SACCUM_FBIT__
+#else
+#define SACCUM_FBIT 7
+#endif // SACCUM_FBIT
+
+#ifdef __SACCUM_IBIT__
+#define SACCUM_IBIT __SACCUM_IBIT__
+#else
+#define SACCUM_IBIT 8
+#endif // SACCUM_IBIT
+
+#ifdef __SACCUM_MIN__
+#define SACCUM_MIN __SACCUM_MIN__
+#else
+#define SACCUM_MIN (-0x1.0p+7HK - 0x1.0p+7HK)
+#endif // SACCUM_MIN
+
+#ifdef __SACCUM_MAX__
+#define SACCUM_MAX __SACCUM_MAX__
+#else
+#define SACCUM_MAX 0x1.FFFCp+7HK
+#endif // SACCUM_MAX
+
+#ifdef __SACCUM_EPSILON__
+#define SACCUM_EPSILON __SACCUM_EPSILON__
+#else
+#define SACCUM_EPSILON 0x1.0p-7HK
+#endif // SACCUM_EPSILON
+
+#ifdef __USACCUM_FBIT__
+#define USACCUM_FBIT __USACCUM_FBIT__
+#else
+#define USACCUM_FBIT 8
+#endif // USACCUM_FBIT
+
+#ifdef __USACCUM_IBIT__
+#define USACCUM_IBIT __USACCUM_IBIT__
+#else
+#define USACCUM_IBIT 8
+#endif // USACCUM_IBIT
+
+#ifdef __USACCUM_MIN__
+#define USACCUM_MIN __USACCUM_MIN__
+#else
+#define USACCUM_MIN 0.0UHK
+#endif // USACCUM_MIN
+
+#ifdef __USACCUM_MAX__
+#define USACCUM_MAX __USACCUM_MAX__
+#else
+#define USACCUM_MAX 0x1.FFFEp+7UHK
+#endif // USACCUM_MAX
+
+#ifdef __USACCUM_EPSILON__
+#define USACCUM_EPSILON __USACCUM_EPSILON__
+#else
+#define USACCUM_EPSILON 0x1.0p-8UHK
+#endif // USACCUM_EPSILON
+
+#ifdef __ACCUM_FBIT__
+#define ACCUM_FBIT __ACCUM_FBIT__
+#else
+#define ACCUM_FBIT 15
+#endif // ACCUM_FBIT
+
+#ifdef __ACCUM_IBIT__
+#define ACCUM_IBIT __ACCUM_IBIT__
+#else
+#define ACCUM_IBIT 16
+#endif // ACCUM_IBIT
+
+#ifdef __ACCUM_MIN__
+#define ACCUM_MIN __ACCUM_MIN__
+#else
+#define ACCUM_MIN (-0x1.0p+15K - 0x1.0p+15K)
+#endif // ACCUM_MIN
+
+#ifdef __ACCUM_MAX__
+#define ACCUM_MAX __ACCUM_MAX__
+#else
+#define ACCUM_MAX 0x1.FFFFFFFCp+15K
+#endif // ACCUM_MAX
+
+#ifdef __ACCUM_EPSILON__
+#define ACCUM_EPSILON __ACCUM_EPSILON__
+#else
+#define ACCUM_EPSILON 0x1.0p-15K
+#endif // ACCUM_EPSILON
+
+#ifdef __UACCUM_FBIT__
+#define UACCUM_FBIT __UACCUM_FBIT__
+#else
+#define UACCUM_FBIT 16
+#endif // UACCUM_FBIT
+
+#ifdef __UACCUM_IBIT__
+#define UACCUM_IBIT __UACCUM_IBIT__
+#else
+#define UACCUM_IBIT 16
+#endif // UACCUM_IBIT
+
+#ifdef __UACCUM_MIN__
+#define UACCUM_MIN __UACCUM_MIN__
+#else
+#define UACCUM_MIN 0.0UK
+#endif // UACCUM_MIN
+
+#ifdef __UACCUM_MAX__
+#define UACCUM_MAX __UACCUM_MAX__
+#else
+#define UACCUM_MAX 0x1.FFFFFFFEp+15UK
+#endif // UACCUM_MAX
+
+#ifdef __UACCUM_EPSILON__
+#define UACCUM_EPSILON __UACCUM_EPSILON__
+#else
+#define UACCUM_EPSILON 0x1.0p-16UK
+#endif // UACCUM_EPSILON
+
+#ifdef __LACCUM_FBIT__
+#define LACCUM_FBIT __LACCUM_FBIT__
+#else
+#define LACCUM_FBIT 31
+#endif // LACCUM_FBIT
+
+#ifdef __LACCUM_IBIT__
+#define LACCUM_IBIT __LACCUM_IBIT__
+#else
+#define LACCUM_IBIT 32
+#endif // LACCUM_IBIT
+
+#ifdef __LACCUM_MIN__
+#define LACCUM_MIN __LACCUM_MIN__
+#else
+#define LACCUM_MIN (-0x1.0p+31LK - 0x1.0p+31LK)
+#endif // LACCUM_MIN
+
+#ifdef __LACCUM_MAX__
+#define LACCUM_MAX __LACCUM_MAX__
+#else
+#define LACCUM_MAX 0x1.FFFFFFFFFFFFFFFCp+31LK
+#endif // LACCUM_MAX
+
+#ifdef __LACCUM_EPSILON__
+#define LACCUM_EPSILON __LACCUM_EPSILON__
+#else
+#define LACCUM_EPSILON 0x1.0p-31LK
+#endif // LACCUM_EPSILON
+
+#ifdef __ULACCUM_FBIT__
+#define ULACCUM_FBIT __ULACCUM_FBIT__
+#else
+#define ULACCUM_FBIT 32
+#endif // ULACCUM_FBIT
+
+#ifdef __ULACCUM_IBIT__
+#define ULACCUM_IBIT __ULACCUM_IBIT__
+#else
+#define ULACCUM_IBIT 32
+#endif // ULACCUM_IBIT
+
+#ifdef __ULACCUM_MIN__
+#define ULACCUM_MIN __ULACCUM_MIN__
+#else
+#define ULACCUM_MIN 0.0ULK
+#endif // ULACCUM_MIN
+
+#ifdef __ULACCUM_MAX__
+#define ULACCUM_MAX __ULACCUM_MAX__
+#else
+#define ULACCUM_MAX 0x1.FFFFFFFFFFFFFFFEp+31ULK
+#endif // ULACCUM_MAX
+
+#ifdef __ULACCUM_EPSILON__
+#define ULACCUM_EPSILON __ULACCUM_EPSILON__
+#else
+#define ULACCUM_EPSILON 0x1.0p-32ULK
+#endif // ULACCUM_EPSILON
+
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
+#endif // __LLVM_LIBC_MACROS_STDFIX_MACROS_H
diff --git a/libc/include/llvm-libc-types/CMakeLists.txt b/libc/include/llvm-libc-types/CMakeLists.txt
index e4f23b2a781305..0ff8e9cf95fb46 100644
--- a/libc/include/llvm-libc-types/CMakeLists.txt
+++ b/libc/include/llvm-libc-types/CMakeLists.txt
@@ -105,3 +105,10 @@ add_header(
DEPENDS
libc.include.llvm-libc-macros.float_macros
)
+add_header(
+ stdfix_types
+ HDR
+ stdfix_types.h
+ DEPENDS
+ libc.include.llvm-libc-macros.stdfix_macros
+)
diff --git a/libc/include/llvm-libc-types/stdfix_types.h b/libc/include/llvm-libc-types/stdfix_types.h
new file mode 100644
index 00000000000000..da22a56fef73cf
--- /dev/null
+++ b/libc/include/llvm-libc-types/stdfix_types.h
@@ -0,0 +1,19 @@
+//===-- Definition from stdfix.h ------------------------------------------===//
+//
+// 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_MACROS_STDFIX_TYPES_H
+#define __LLVM_LIBC_MACROS_STDFIX_TYPES_H
+
+#include <include/llvm-libc-macros/stdfix-macros.h>
+
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+#define fract _Fract
+#define accum _Accum
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
+#endif // __LLVM_LIBC_MACROS_STDFIX_TYPES_H
diff --git a/libc/include/stdfix.h.def b/libc/include/stdfix.h.def
new file mode 100644
index 00000000000000..1ffef915bfd019
--- /dev/null
+++ b/libc/include/stdfix.h.def
@@ -0,0 +1,21 @@
+//===-- C standard library header stdfix.h --------------------------------===//
+//
+// 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_STDFIX_H
+#define LLVM_LIBC_STDFIX_H
+
+#include <__llvm-libc-common.h>
+#include <llvm-libc-macros/stdfix-macros.h>
+#include <llvm-libc-types/stdfix-types.h>
+
+// From N1169 standard:
+// https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf
+
+%%public_api()
+
+#endif // LLVM_LIBC_STDFIX_H
diff --git a/libc/spec/spec.td b/libc/spec/spec.td
index aebf4955382862..879a845aba6252 100644
--- a/libc/spec/spec.td
+++ b/libc/spec/spec.td
@@ -55,6 +55,22 @@ def UnsignedShortType : NamedType<"unsigned short">;
// TODO: Add compatibility layer to use C23 type _Float128 if possible.
def Float128Type : NamedType<"float128">;
+// Fixed point types
+// https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf
+def ShortFractType : NamedType<"short fract">;
+def FractType : NamedType<"fract">;
+def LongFractType : NamedType<"long fract">;
+def UnsignedShortFractType : NamedType<"unsigned short fract">;
+def UnsignedFractType : NamedType<"unsigned fract">;
+def UnsignedLongFractType : NamedType<"unsigned long fract">;
+
+def ShortAccumType : NamedType<"short accum">;
+def AccumType : NamedType<"accum">;
+def LongAccumType : NamedType<"long accum">;
+def UnsignedShortAccumType : NamedType<"unsigned short accum">;
+def UnsignedAccumType : NamedType<"unsigned accum">;
+def UnsignedLongAccumType : NamedType<"unsigned long accum">;
+
// Common types
def VoidPtr : PtrType<VoidType>;
def VoidPtrPtr : PtrType<VoidPtr>;
diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td
index e37f95a7c2daf0..11a82d043ab20d 100644
--- a/libc/spec/stdc.td
+++ b/libc/spec/stdc.td
@@ -15,6 +15,8 @@ def StdC : StandardSpec<"stdc"> {
PtrType TssTPtr = PtrType<TssTType>;
NamedType TssDtorTType = NamedType<"tss_dtor_t">;
+
+
HeaderSpec Assert = HeaderSpec<
"assert.h",
[
@@ -898,6 +900,22 @@ def StdC : StandardSpec<"stdc"> {
]
>;
+ HeaderSpec StdFix = HeaderSpec<
+ "stdfix.h",
+ [], // macros
+ [], // types
+ [], // enums
+ [ // functions
+ GuardedFunctionSpec<"abshr", RetValSpec<ShortFractType>, [ArgSpec<ShortFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+ GuardedFunctionSpec<"absr", RetValSpec<FractType>, [ArgSpec<FractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+ GuardedFunctionSpec<"abslr", RetValSpec<LongFractType>, [ArgSpec<LongFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+
+ GuardedFunctionSpec<"abshk", RetValSpec<ShortAccumType>, [ArgSpec<ShortAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+ GuardedFunctionSpec<"absk", RetValSpec<AccumType>, [ArgSpec<AccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+ GuardedFunctionSpec<"abslk", RetValSpec<LongAccumType>, [ArgSpec<LongAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+ ]
+ >;
+
HeaderSpec Limits = HeaderSpec<"limits.h">;
NamedType SigAtomicT = NamedType<"sig_atomic_t">;
diff --git a/libc/src/CMakeLists.txt b/libc/src/CMakeLists.txt
index 5211db7bc1f993..09b16be1e2d42e 100644
--- a/libc/src/CMakeLists.txt
+++ b/libc/src/CMakeLists.txt
@@ -6,6 +6,7 @@ add_subdirectory(fenv)
add_subdirectory(inttypes)
add_subdirectory(math)
add_subdirectory(stdbit)
+add_subdirectory(stdfix)
add_subdirectory(stdio)
add_subdirectory(stdlib)
add_subdirectory(string)
diff --git a/libc/src/__support/CMakeLists.txt b/libc/src/__support/CMakeLists.txt
index bd814a080c4f87..ed32f0a032c9f7 100644
--- a/libc/src/__support/CMakeLists.txt
+++ b/libc/src/__support/CMakeLists.txt
@@ -271,3 +271,5 @@ add_subdirectory(threads)
add_subdirectory(File)
add_subdirectory(HashTable)
+
+add_subdirectory(fixedpoint)
diff --git a/libc/src/__support/CPP/CMakeLists.txt b/libc/src/__support/CPP/CMakeLists.txt
index f10bb936047eb9..5c8c7a74f8fe71 100644
--- a/libc/src/__support/CPP/CMakeLists.txt
+++ b/libc/src/__support/CPP/CMakeLists.txt
@@ -122,6 +122,7 @@ add_header_library(
type_traits/is_convertible.h
type_traits/is_destructible.h
type_traits/is_enum.h
+ type_traits/is_fixed_point.h
type_traits/is_floating_point.h
type_traits/is_function.h
type_traits/is_integral.h
diff --git a/libc/src/__support/CPP/type_traits.h b/libc/src/__support/CPP/type_traits.h
index 1eb2f34ebee37f..697cf79d6ccc59 100644
--- a/libc/src/__support/CPP/type_traits.h
+++ b/libc/src/__support/CPP/type_traits.h
@@ -28,6 +28,7 @@
#include "src/__support/CPP/type_traits/is_convertible.h"
#include "src/__support/CPP/type_traits/is_destructible.h"
#include "src/__support/CPP/type_traits/is_enum.h"
+#include "src/__support/CPP/type_traits/is_fixed_point.h"
#include "src/__support/CPP/type_traits/is_floating_point.h"
#include "src/__support/CPP/type_traits/is_function.h"
#include "src/__support/CPP/type_traits/is_integral.h"
diff --git a/libc/src/__support/CPP/type_traits/is_fixed_point.h b/libc/src/__support/CPP/type_traits/is_fixed_point.h
new file mode 100644
index 00000000000000..368bfad11463c7
--- /dev/null
+++ b/libc/src/__support/CPP/type_traits/is_fixed_point.h
@@ -0,0 +1,44 @@
+//===-- is_fixed_point type_traits ------------------------------*- 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_CPP_TYPE_TRAITS_IS_FIXED_POINT_H
+#define LLVM_LIBC_SRC___SUPPORT_CPP_TYPE_TRAITS_IS_FIXED_POINT_H
+
+#include "src/__support/CPP/type_traits/is_same.h"
+#include "src/__support/CPP/type_traits/remove_cv.h"
+#include "src/__support/macros/attributes.h"
+
+#include "include/llvm-libc-macros/stdfix-macros.h"
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE::cpp {
+
+// is_fixed_point
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+template <typename T> struct is_fixed_point {
+private:
+ template <typename Head, typename... Args>
+ LIBC_INLINE_VAR static constexpr bool __is_unqualified_any_of() {
+ return (... || is_same_v<remove_cv_t<Head>, Args>);
+ }
+
+public:
+ LIBC_INLINE_VAR static constexpr bool value = __is_unqualified_any_of<
+ T, short fract, fract, long fract, unsigned short fract, unsigned fract,
+ unsigned long fract, short accum, accum, long accum, unsigned short accum,
+ unsigned accum, unsigned long accum>();
+};
+#else
+template <typename T> struct is_fixed_point : false_type {};
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
+template <typename T>
+LIBC_INLINE_VAR constexpr bool is_fixed_point_v = is_fixed_point<T>::value;
+
+} // namespace LIBC_NAMESPACE::cpp
+
+#endif // LLVM_LIBC_SRC___SUPPORT_CPP_TYPE_TRAITS_IS_INTEGRAL_H
diff --git a/libc/src/__support/fixedpoint/CMakeLists.txt b/libc/src/__support/fixedpoint/CMakeLists.txt
new file mode 100644
index 00000000000000..0e180ff773d402
--- /dev/null
+++ b/libc/src/__support/fixedpoint/CMakeLists.txt
@@ -0,0 +1,21 @@
+add_header_library(
+ fx_rep
+ HDRS
+ fxrep.h
+ DEPENDS
+ libc.include.llvm-libc-macros.stdfix_macros
+ libc.include.llvm-libc-types.stdfix_types
+ libc.src.__support.macros.attributes
+)
+
+add_header_library(
+ fx_bits
+ HDRS
+ fxbits.h
+ DEPENDS
+ .fx_rep
+ libc.include.llvm-libc-macros.stdfix_macros
+ libc.include.llvm-libc-types.stdfix_types
+ libc.src.__support.macros.attributes
+ libc.src.__support.macros.optimization
+)
diff --git a/libc/src/__support/fixedpoint/fxbits.h b/libc/src/__support/fixedpoint/fxbits.h
new file mode 100644
index 00000000000000..89187dffc34f66
--- /dev/null
+++ b/libc/src/__support/fixedpoint/fxbits.h
@@ -0,0 +1,38 @@
+//===-- Utility class to manipulate fixed 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_FIXEDPOINT_FXBITS_H
+#define LLVM_LIBC_SRC___SUPPORT_FIXEDPOINT_FXBITS_H
+
+#include "include/llvm-libc-macros/stdfix-macros.h"
+#include "include/llvm-libc-types/stdfix_types.h"
+#include "src/__support/macros/attributes.h" // LIBC_INLINE
+#include "src/__support/macros/optimization.h" // LIBC_UNLIKELY
+
+#include "fxrep.h"
+
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+
+namespace LIBC_NAMESPACE::fixed_point {
+
+template <typename T> LIBC_INLINE constexpr T abs(T x) {
+ using FXRep = FXRep<T>;
+ if constexpr (FXRep::SIGN_LEN == 0)
+ return x;
+ else {
+ if (LIBC_UNLIKELY(x == FXRep::MIN()))
+ return FXRep::MAX();
+ return (x < FXRep::ZERO() ? -x : x);
+ }
+}
+
+} // namespace LIBC_NAMESPACE::fixed_point
+
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
+#endif // LLVM_LIBC_SRC___SUPPORT_FIXEDPOINT_FXBITS_H
diff --git a/libc/src/__support/fixedpoint/fxrep.h b/libc/src/__support/fixedpoint/fxrep.h
new file mode 100644
index 00000000000000..b98354ea7e4113
--- /dev/null
+++ b/libc/src/__support/fixedpoint/fxrep.h
@@ -0,0 +1,158 @@
+//===-- Utility class to manipulate fixed 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_FIXEDPOINT_FXREP_H
+#define LLVM_LIBC_SRC___SUPPORT_FIXEDPOINT_FXREP_H
+
+#include "include/llvm-libc-macros/stdfix-macros.h"
+#include "include/llvm-libc-types/stdfix_types.h"
+#include "src/__support/macros/attributes.h" // LIBC_INLINE, LIBC_INLINE_VAR
+
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+
+namespace LIBC_NAMESPACE::fixed_point {
+
+template <typename T> struct FXRep;
+
+template <> struct FXRep<short fract> {
+ using Type = short _Fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = SFRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return SFRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return SFRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0HR; }
+ LIBC_INLINE static constexpr Type EPS() { return SFRACT_EPSILON; }
+};
+
+template <> struct FXRep<unsigned short fract> {
+ using Type = unsigned short fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = USFRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return USFRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return USFRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0UHR; }
+ LIBC_INLINE static constexpr Type EPS() { return USFRACT_EPSILON; }
+};
+
+template <> struct FXRep<fract> {
+ using Type = fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = FRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return FRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return FRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0R; }
+ LIBC_INLINE static constexpr Type EPS() { return FRACT_EPSILON; }
+};
+
+template <> struct FXRep<unsigned fract> {
+ using Type = unsigned fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = UFRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return UFRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return UFRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0UR; }
+ LIBC_INLINE static constexpr Type EPS() { return UFRACT_EPSILON; }
+};
+
+template <> struct FXRep<long fract> {
+ using Type = long fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = LFRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return LFRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return LFRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0LR; }
+ LIBC_INLINE static constexpr Type EPS() { return LFRACT_EPSILON; }
+};
+
+template <> struct FXRep<unsigned long fract> {
+ using Type = unsigned long fract;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = ULFRACT_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return ULFRACT_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return ULFRACT_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0ULR; }
+ LIBC_INLINE static constexpr Type EPS() { return ULFRACT_EPSILON; }
+};
+
+template <> struct FXRep<short accum> {
+ using Type = short accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = SACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = SACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return SACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return SACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0HK; }
+ LIBC_INLINE static constexpr Type EPS() { return SACCUM_EPSILON; }
+};
+
+template <> struct FXRep<unsigned short accum> {
+ using Type = unsigned short accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = UACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = USACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return USACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return USACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0UHK; }
+ LIBC_INLINE static constexpr Type EPS() { return USACCUM_EPSILON; }
+};
+
+template <> struct FXRep<accum> {
+ using Type = accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = ACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = ACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return ACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return ACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0K; }
+ LIBC_INLINE static constexpr Type EPS() { return ACCUM_EPSILON; }
+};
+
+template <> struct FXRep<unsigned accum> {
+ using Type = unsigned accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = UACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = UACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return UACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return UACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0UK; }
+ LIBC_INLINE static constexpr Type EPS() { return UACCUM_EPSILON; }
+};
+
+template <> struct FXRep<long accum> {
+ using Type = long accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 1;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = LACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = LACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return LACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return LACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0LK; }
+ LIBC_INLINE static constexpr Type EPS() { return LACCUM_EPSILON; }
+};
+
+template <> struct FXRep<unsigned long accum> {
+ using Type = unsigned long accum;
+ LIBC_INLINE_VAR static constexpr int SIGN_LEN = 0;
+ LIBC_INLINE_VAR static constexpr int INTEGRAL_LEN = ULACCUM_IBIT;
+ LIBC_INLINE_VAR static constexpr int FRACTION_LEN = ULACCUM_FBIT;
+ LIBC_INLINE static constexpr Type MIN() { return ULACCUM_MIN; }
+ LIBC_INLINE static constexpr Type MAX() { return ULACCUM_MIN; }
+ LIBC_INLINE static constexpr Type ZERO() { return 0.0ULK; }
+ LIBC_INLINE static constexpr Type EPS() { return ULACCUM_EPSILON; }
+};
+
+} // namespace LIBC_NAMESPACE::fixed_point
+
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
+#endif // LLVM_LIBC_SRC___SUPPORT_FIXEDPOINT_FXREP_H
diff --git a/libc/src/stdfix/CMakeLists.txt b/libc/src/stdfix/CMakeLists.txt
new file mode 100644
index 00000000000000..4aa055df0ac1b2
--- /dev/null
+++ b/libc/src/stdfix/CMakeLists.txt
@@ -0,0 +1,18 @@
+if(NOT LIBC_COMPILER_HAS_FIXED_POINT)
+ return()
+endif()
+
+foreach(suffix IN ITEMS hr r lr hk k lk)
+ add_entrypoint_object(
+ abs${suffix}
+ HDRS
+ abs${suffix}.h
+ SRCS
+ abs${suffix}.cpp
+ COMPILE_OPTIONS
+ -O3
+ -ffixed-point
+ DEPENDS
+ libc.src.__support.fixedpoint.fx_bits
+ )
+endforeach()
diff --git a/libc/src/stdfix/abshk.cpp b/libc/src/stdfix/abshk.cpp
new file mode 100644
index 00000000000000..93a1c72bd0ca88
--- /dev/null
+++ b/libc/src/stdfix/abshk.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of abshk 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 "abshk.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(short accum, abshk, (short accum x)) {
+ return fixed_point::abs(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/abshk.h b/libc/src/stdfix/abshk.h
new file mode 100644
index 00000000000000..1f2d8d3faa3ece
--- /dev/null
+++ b/libc/src/stdfix/abshk.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for abshk -------------------------*- 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_STDFIX_ABSHK_H
+#define LLVM_LIBC_SRC_STDFIX_ABSHK_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+short accum abshk(short accum x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSHK_H
diff --git a/libc/src/stdfix/abshr.cpp b/libc/src/stdfix/abshr.cpp
new file mode 100644
index 00000000000000..f96080827468e5
--- /dev/null
+++ b/libc/src/stdfix/abshr.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of abshr 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 "abshr.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(short fract, abshr, (short fract x)) {
+ return fixed_point::abs(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/abshr.h b/libc/src/stdfix/abshr.h
new file mode 100644
index 00000000000000..beb61f8113162d
--- /dev/null
+++ b/libc/src/stdfix/abshr.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for abshr -------------------------*- 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_STDFIX_ABSHR_H
+#define LLVM_LIBC_SRC_STDFIX_ABSHR_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+short fract abshr(short fract x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSHR_H
diff --git a/libc/src/stdfix/absk.cpp b/libc/src/stdfix/absk.cpp
new file mode 100644
index 00000000000000..0505d12af39d4d
--- /dev/null
+++ b/libc/src/stdfix/absk.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of absk 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 "absk.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(accum, absk, (accum x)) { return fixed_point::abs(x); }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/absk.h b/libc/src/stdfix/absk.h
new file mode 100644
index 00000000000000..0e446e65413a7f
--- /dev/null
+++ b/libc/src/stdfix/absk.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for absk --------------------------*- 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_STDFIX_ABSK_H
+#define LLVM_LIBC_SRC_STDFIX_ABSK_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+accum absk(accum x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSK_H
diff --git a/libc/src/stdfix/abslk.cpp b/libc/src/stdfix/abslk.cpp
new file mode 100644
index 00000000000000..3ddb7630416726
--- /dev/null
+++ b/libc/src/stdfix/abslk.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of abslk 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 "abslk.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long accum, abslk, (long accum x)) {
+ return fixed_point::abs(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/abslk.h b/libc/src/stdfix/abslk.h
new file mode 100644
index 00000000000000..a4b264aaae5c63
--- /dev/null
+++ b/libc/src/stdfix/abslk.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for abslk -------------------------*- 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_STDFIX_ABSLK_H
+#define LLVM_LIBC_SRC_STDFIX_ABSLK_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+long accum abslk(long accum x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSLK_H
diff --git a/libc/src/stdfix/abslr.cpp b/libc/src/stdfix/abslr.cpp
new file mode 100644
index 00000000000000..4764042eeeb91d
--- /dev/null
+++ b/libc/src/stdfix/abslr.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of abslr 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 "abslr.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(long fract, abslr, (long fract x)) {
+ return fixed_point::abs(x);
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/abslr.h b/libc/src/stdfix/abslr.h
new file mode 100644
index 00000000000000..3c80c50928ec29
--- /dev/null
+++ b/libc/src/stdfix/abslr.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for abslr -------------------------*- 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_STDFIX_ABSLR_H
+#define LLVM_LIBC_SRC_STDFIX_ABSLR_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+long fract abslr(long fract x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSLR_H
diff --git a/libc/src/stdfix/absr.cpp b/libc/src/stdfix/absr.cpp
new file mode 100644
index 00000000000000..8745ed9b65d3de
--- /dev/null
+++ b/libc/src/stdfix/absr.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of absr 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 "absr.h"
+#include "src/__support/common.h"
+#include "src/__support/fixedpoint/fxbits.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(fract, absr, (fract x)) { return fixed_point::abs(x); }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/stdfix/absr.h b/libc/src/stdfix/absr.h
new file mode 100644
index 00000000000000..dbe5308d421c10
--- /dev/null
+++ b/libc/src/stdfix/absr.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for absr --------------------------*- 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_STDFIX_ABSR_H
+#define LLVM_LIBC_SRC_STDFIX_ABSR_H
+
+#include "include/llvm-libc-types/stdfix_types.h"
+
+namespace LIBC_NAMESPACE {
+
+fract absr(fract x);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_STDFIX_ABSR_H
diff --git a/libc/test/UnitTest/CMakeLists.txt b/libc/test/UnitTest/CMakeLists.txt
index 9baa41874a83db..e3099e45154765 100644
--- a/libc/test/UnitTest/CMakeLists.txt
+++ b/libc/test/UnitTest/CMakeLists.txt
@@ -31,6 +31,9 @@ function(add_unittest_framework_library name)
if(TARGET libc.src.time.clock)
target_compile_definitions(${lib} PRIVATE TARGET_SUPPORTS_CLOCK)
endif()
+ if(LIBC_COMPILER_HAS_FIXED_POINT)
+ target_compile_options(${lib} PUBLIC -ffixed-point)
+ endif()
endforeach()
target_include_directories(${name}.hermetic PRIVATE ${LIBC_BUILD_DIR}/include)
target_compile_options(${name}.hermetic
diff --git a/libc/test/UnitTest/LibcTest.cpp b/libc/test/UnitTest/LibcTest.cpp
index 201b40a178dca0..e21c59bc259677 100644
--- a/libc/test/UnitTest/LibcTest.cpp
+++ b/libc/test/UnitTest/LibcTest.cpp
@@ -13,6 +13,9 @@
#include "src/__support/UInt128.h"
#include "test/UnitTest/TestLogger.h"
+#include "include/llvm-libc-macros/stdfix-macros.h"
+#include "include/llvm-libc-types/stdfix_types.h"
+
#if __STDC_HOSTED__
#include <time.h>
#define LIBC_TEST_USE_CLOCK
@@ -53,6 +56,46 @@ describeValue(ValType Value) {
return cpp::to_string(Value);
}
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+cpp::string describeValue(short fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint8_t>(Value));
+}
+cpp::string describeValue(fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint16_t>(Value));
+}
+cpp::string describeValue(long fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint32_t>(Value));
+}
+cpp::string describeValue(unsigned short fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint8_t>(Value));
+}
+cpp::string describeValue(unsigned fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint16_t>(Value));
+}
+cpp::string describeValue(unsigned long fract Value) {
+ return cpp::to_string(cpp::bit_cast<uint32_t>(Value));
+}
+
+cpp::string describeValue(short accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint16_t>(Value));
+}
+cpp::string describeValue(accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint32_t>(Value));
+}
+cpp::string describeValue(long accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint64_t>(Value));
+}
+cpp::string describeValue(unsigned short accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint16_t>(Value));
+}
+cpp::string describeValue(unsigned accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint32_t>(Value));
+}
+cpp::string describeValue(unsigned long accum Value) {
+ return cpp::to_string(cpp::bit_cast<uint64_t>(Value));
+}
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
+
cpp::string_view describeValue(const cpp::string &Value) { return Value; }
cpp::string_view describeValue(cpp::string_view Value) { return Value; }
@@ -181,50 +224,24 @@ int Test::runTests(const char *TestFilter) {
namespace internal {
-template bool test<char>(RunContext *Ctx, TestCond Cond, char LHS, char RHS,
- const char *LHSStr, const char *RHSStr, Location Loc);
-
-template bool test<short>(RunContext *Ctx, TestCond Cond, short LHS, short RHS,
- const char *LHSStr, const char *RHSStr, Location Loc);
-
-template bool test<int>(RunContext *Ctx, TestCond Cond, int LHS, int RHS,
- const char *LHSStr, const char *RHSStr, Location Loc);
-
-template bool test<long>(RunContext *Ctx, TestCond Cond, long LHS, long RHS,
- const char *LHSStr, const char *RHSStr, Location Loc);
-
-template bool test<long long>(RunContext *Ctx, TestCond Cond, long long LHS,
- long long RHS, const char *LHSStr,
- const char *RHSStr, Location Loc);
-
-template bool test<unsigned char>(RunContext *Ctx, TestCond Cond,
- unsigned char LHS, unsigned char RHS,
- const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<unsigned short>(RunContext *Ctx, TestCond Cond,
- unsigned short LHS, unsigned short RHS,
- const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<unsigned int>(RunContext *Ctx, TestCond Cond,
- unsigned int LHS, unsigned int RHS,
- const char *LHSStr, const char *RHSStr,
- Location Loc);
+#define TEST_SPECIALIZATION(TYPE) \
+ template bool test<TYPE>(RunContext * Ctx, TestCond Cond, TYPE LHS, \
+ TYPE RHS, const char *LHSStr, const char *RHSStr, \
+ Location Loc)
-template bool test<unsigned long>(RunContext *Ctx, TestCond Cond,
- unsigned long LHS, unsigned long RHS,
- const char *LHSStr, const char *RHSStr,
- Location Loc);
+TEST_SPECIALIZATION(char);
+TEST_SPECIALIZATION(short);
+TEST_SPECIALIZATION(int);
+TEST_SPECIALIZATION(long);
+TEST_SPECIALIZATION(long long);
-template bool test<bool>(RunContext *Ctx, TestCond Cond, bool LHS, bool RHS,
- const char *LHSStr, const char *RHSStr, Location Loc);
+TEST_SPECIALIZATION(unsigned char);
+TEST_SPECIALIZATION(unsigned short);
+TEST_SPECIALIZATION(unsigned int);
+TEST_SPECIALIZATION(unsigned long);
+TEST_SPECIALIZATION(unsigned long long);
-template bool test<unsigned long long>(RunContext *Ctx, TestCond Cond,
- unsigned long long LHS,
- unsigned long long RHS,
- const char *LHSStr, const char *RHSStr,
- Location Loc);
+TEST_SPECIALIZATION(bool);
// We cannot just use a single UInt128 specialization as that resolves to only
// one type, UInt<128> or __uint128_t. We want both overloads as we want to
@@ -233,47 +250,34 @@ template bool test<unsigned long long>(RunContext *Ctx, TestCond Cond,
#ifdef __SIZEOF_INT128__
// When builtin __uint128_t type is available, include its specialization
// also.
-template bool test<__uint128_t>(RunContext *Ctx, TestCond Cond, __uint128_t LHS,
- __uint128_t RHS, const char *LHSStr,
- const char *RHSStr, Location Loc);
+TEST_SPECIALIZATION(__uint128_t);
#endif
-template bool test<LIBC_NAMESPACE::cpp::Int<128>>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::Int<128> LHS,
- LIBC_NAMESPACE::cpp::Int<128> RHS, const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::UInt<128>>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::UInt<128> LHS,
- LIBC_NAMESPACE::cpp::UInt<128> RHS, const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::UInt<192>>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::UInt<192> LHS,
- LIBC_NAMESPACE::cpp::UInt<192> RHS, const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::UInt<256>>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::UInt<256> LHS,
- LIBC_NAMESPACE::cpp::UInt<256> RHS, const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::UInt<320>>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::UInt<320> LHS,
- LIBC_NAMESPACE::cpp::UInt<320> RHS, const char *LHSStr, const char *RHSStr,
- Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::string_view>(
- RunContext *Ctx, TestCond Cond, LIBC_NAMESPACE::cpp::string_view LHS,
- LIBC_NAMESPACE::cpp::string_view RHS, const char *LHSStr,
- const char *RHSStr, Location Loc);
-
-template bool test<LIBC_NAMESPACE::cpp::string>(RunContext *Ctx, TestCond Cond,
- LIBC_NAMESPACE::cpp::string LHS,
- LIBC_NAMESPACE::cpp::string RHS,
- const char *LHSStr,
- const char *RHSStr,
- Location Loc);
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::Int<128>);
+
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::UInt<128>);
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::UInt<192>);
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::UInt<256>);
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::UInt<320>);
+
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::string_view);
+TEST_SPECIALIZATION(LIBC_NAMESPACE::cpp::string);
+
+#ifdef LIBC_COMPILER_HAS_FIXED_POINT
+TEST_SPECIALIZATION(short fract);
+TEST_SPECIALIZATION(fract);
+TEST_SPECIALIZATION(long fract);
+TEST_SPECIALIZATION(unsigned short fract);
+TEST_SPECIALIZATION(unsigned fract);
+TEST_SPECIALIZATION(unsigned long fract);
+
+TEST_SPECIALIZATION(short accum);
+TEST_SPECIALIZATION(accum);
+TEST_SPECIALIZATION(long accum);
+TEST_SPECIALIZATION(unsigned short accum);
+TEST_SPECIALIZATION(unsigned accum);
+TEST_SPECIALIZATION(unsigned long accum);
+#endif // LIBC_COMPILER_HAS_FIXED_POINT
} // namespace internal
diff --git a/libc/test/UnitTest/LibcTest.h b/libc/test/UnitTest/LibcTest.h
index 047f18036b0ac2..00e34a4da85852 100644
--- a/libc/test/UnitTest/LibcTest.h
+++ b/libc/test/UnitTest/LibcTest.h
@@ -126,7 +126,9 @@ class Test {
// |Cond| on mismatched |LHS| and |RHS| types can potentially succeed because
// of type promotion.
template <typename ValType,
- cpp::enable_if_t<cpp::is_integral_v<ValType>, int> = 0>
+ cpp::enable_if_t<cpp::is_integral_v<ValType> ||
+ cpp::is_fixed_point_v<ValType>,
+ int> = 0>
bool test(TestCond Cond, ValType LHS, ValType RHS, const char *LHSStr,
const char *RHSStr, internal::Location Loc) {
return internal::test(Ctx, Cond, LHS, RHS, LHSStr, RHSStr, Loc);
diff --git a/libc/test/src/CMakeLists.txt b/libc/test/src/CMakeLists.txt
index 6c99c6735befff..9ad868551f071c 100644
--- a/libc/test/src/CMakeLists.txt
+++ b/libc/test/src/CMakeLists.txt
@@ -44,6 +44,7 @@ add_subdirectory(inttypes)
add_subdirectory(math)
add_subdirectory(search)
add_subdirectory(stdbit)
+add_subdirectory(stdfix)
add_subdirectory(stdio)
add_subdirectory(stdlib)
add_subdirectory(string)
diff --git a/libc/test/src/stdfix/AbsTest.h b/libc/test/src/stdfix/AbsTest.h
new file mode 100644
index 00000000000000..a0f76fa6961817
--- /dev/null
+++ b/libc/test/src/stdfix/AbsTest.h
@@ -0,0 +1,37 @@
+//===-- Utility class to test fixed-point abs -------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "test/UnitTest/Test.h"
+
+#include "src/__support/fixedpoint/fxrep.h"
+
+template <typename T> class AbsTest : public LIBC_NAMESPACE::testing::Test {
+
+ using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>;
+ static constexpr T zero = FXRep::ZERO();
+ static constexpr T min = FXRep::MIN();
+ static constexpr T max = FXRep::MAX();
+ static constexpr T half = static_cast<T>(0.5);
+ static constexpr T neg_half = static_cast<T>(-0.5);
+
+public:
+ typedef T (*AbsFunc)(T);
+
+ void testSpecialNumbers(AbsFunc func) {
+ EXPECT_EQ(zero, func(zero));
+ EXPECT_EQ(max, func(min));
+ EXPECT_EQ(max, func(max));
+ EXPECT_EQ(half, func(half));
+ EXPECT_EQ(half, func(neg_half));
+ }
+};
+
+#define LIST_ABS_TESTS(T, func) \
+ using LlvmLibcAbsTest = AbsTest<T>; \
+ TEST_F(LlvmLibcAbsTest, SpecialNumbers) { testSpecialNumbers(&func); } \
+ static_assert(true, "Require semicolon.")
diff --git a/libc/test/src/stdfix/CMakeLists.txt b/libc/test/src/stdfix/CMakeLists.txt
new file mode 100644
index 00000000000000..7cab9ca22abc0d
--- /dev/null
+++ b/libc/test/src/stdfix/CMakeLists.txt
@@ -0,0 +1,23 @@
+if(NOT LIBC_COMPILER_HAS_FIXED_POINT)
+ return()
+endif()
+
+add_custom_target(libc-stdfix-tests)
+
+foreach(suffix IN ITEMS hr r lr hk k lk)
+ add_libc_test(
+ abs${suffix}_test
+ SUITE
+ libc-stdfix-tests
+ HDRS
+ AbsTest.h
+ SRCS
+ abs${suffix}_test.cpp
+ COMPILE_OPTIONS
+ -O3
+ -ffixed-point
+ DEPENDS
+ libc.src.stdfix.abs${suffix}
+ libc.src.__support.fixedpoint.fx_bits
+ )
+endforeach()
diff --git a/libc/test/src/stdfix/abshk_test.cpp b/libc/test/src/stdfix/abshk_test.cpp
new file mode 100644
index 00000000000000..c3f58625ac58ce
--- /dev/null
+++ b/libc/test/src/stdfix/abshk_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for abshk -----------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/abshk.h"
+
+LIST_ABS_TESTS(short accum, LIBC_NAMESPACE::abshk);
diff --git a/libc/test/src/stdfix/abshr_test.cpp b/libc/test/src/stdfix/abshr_test.cpp
new file mode 100644
index 00000000000000..d7a962ea1f98d3
--- /dev/null
+++ b/libc/test/src/stdfix/abshr_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for abshr -----------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/abshr.h"
+
+LIST_ABS_TESTS(short fract, LIBC_NAMESPACE::abshr);
diff --git a/libc/test/src/stdfix/absk_test.cpp b/libc/test/src/stdfix/absk_test.cpp
new file mode 100644
index 00000000000000..729cf143a4130a
--- /dev/null
+++ b/libc/test/src/stdfix/absk_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for absk ------------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/absk.h"
+
+LIST_ABS_TESTS(accum, LIBC_NAMESPACE::absk);
diff --git a/libc/test/src/stdfix/abslk_test.cpp b/libc/test/src/stdfix/abslk_test.cpp
new file mode 100644
index 00000000000000..93ef3469a225af
--- /dev/null
+++ b/libc/test/src/stdfix/abslk_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for abslk -----------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/abslk.h"
+
+LIST_ABS_TESTS(long accum, LIBC_NAMESPACE::abslk);
diff --git a/libc/test/src/stdfix/abslr_test.cpp b/libc/test/src/stdfix/abslr_test.cpp
new file mode 100644
index 00000000000000..c50a5587380288
--- /dev/null
+++ b/libc/test/src/stdfix/abslr_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for abslr -----------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/abslr.h"
+
+LIST_ABS_TESTS(long fract, LIBC_NAMESPACE::abslr);
diff --git a/libc/test/src/stdfix/absr_test.cpp b/libc/test/src/stdfix/absr_test.cpp
new file mode 100644
index 00000000000000..7b811735397935
--- /dev/null
+++ b/libc/test/src/stdfix/absr_test.cpp
@@ -0,0 +1,13 @@
+//===-- Unittests for absr ------------------------------------------------===//
+//
+// 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 "AbsTest.h"
+
+#include "src/stdfix/absr.h"
+
+LIST_ABS_TESTS(fract, LIBC_NAMESPACE::absr);
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