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Tue Ly bc10a41080 [libc][math] Improve the performance and error printing of UInt. 
Use add_with_carry builtin to improve the performance of
addition and multiplication of UInt class.  For 128-bit, it is as
fast as using __uint128_t.

Microbenchmark for addition:
https://quick-bench.com/q/-5a6xM4T8rIXBhqMTtLE-DD2h8w

Microbenchmark for multiplication:
https://quick-bench.com/q/P2muLAzJ_W-VqWCuxEJ0CU0bLDg

Microbenchmark for shift right:
https://quick-bench.com/q/N-jkKXaVsGQ4AAv3k8VpsVkua5Y

Microbenchmark for shift left:
https://quick-bench.com/q/5-RzwF8UdslC-zuhNajXtXdzLRM

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D137871
 		2022-11-15 14:17:59 -05:00
..
CMakeLists.txt [libc] add scanf parser and core utilities 2022-10-28 10:52:51 -07:00
FPExceptMatcher.cpp [libc][NFC] Move test related pieces from FPUtil to util/UnitTest. 2021-10-29 15:37:30 +00:00
FPExceptMatcher.h [libc][NFC] Move test related pieces from FPUtil to util/UnitTest. 2021-10-29 15:37:30 +00:00
FPMatcher.cpp [libc][NFC] Use STL case for type_traits 2022-07-29 09:57:03 +00:00
FPMatcher.h [libc] Resolve NaN/implementation-defined behavior of floating-point tests 2022-10-06 21:11:47 -07:00
FuchsiaTest.h [libc] Add Fuchsia implementation of ::testing::Test 2022-06-13 21:03:51 +00:00
LibcTest.cpp [libc][math] Improve the performance and error printing of UInt. 2022-11-15 14:17:59 -05:00
LibcTest.h [libc] Add a testing macro for MPFR matchers skipping `explainError` calls. 2022-10-26 18:11:45 -04:00
LibcTestMain.cpp [libc] Add option to run specific tests 2021-07-23 16:08:13 +00:00
MemoryMatcher.cpp [libc][test] Better reporting for MemoryMatcher 2022-09-29 12:14:05 +00:00
MemoryMatcher.h [libc][test] Better reporting for MemoryMatcher 2022-09-29 12:14:05 +00:00
PlatformDefs.h [libc] Clean up Windows macros 2021-07-23 21:12:36 +00:00
PrintfMatcher.cpp [libc] move printf to use StringViews 2022-08-24 10:28:31 -07:00
PrintfMatcher.h [libc] add scanf parser and core utilities 2022-10-28 10:52:51 -07:00
README.md
…
ScanfMatcher.cpp [libc] add scanf parser and core utilities 2022-10-28 10:52:51 -07:00
ScanfMatcher.h [libc] add scanf parser and core utilities 2022-10-28 10:52:51 -07:00
StringUtils.h [libc][NFC] Use STL case for type_traits 2022-07-29 09:57:03 +00:00
Test.h [libc][NFC] add macro for fuchsia to switch test backend to zxtest 2021-01-13 21:28:02 +00:00

README.md

The LLVM libc unit test framework

This directory contains a lightweight implementation of a gtest like unit test framework for LLVM libc.

Why not gtest?

While gtest is great, featureful and time tested, it uses the C and C++ standard libraries. Hence, using it to test LLVM libc (which is also an implementation of the C standard libraries) causes various kinds of mixup/conflict problems.

How is it different from gtest?

LLVM libc's unit test framework is much less featureful as compared to gtest. But, what is available strives to be exactly like gtest.

Will it be made as featureful as gtest in future?

It is not clear if LLVM libc needs/will need every feature of gtest. We only intend to extend it on an as needed basis. Hence, it might never be as featureful as gtest.