delta/llvm.git/libc/utils, branch EmptyLineAfterFunctionDefinition

[libc] Add more robust compile time architecture detection

2021-11-02T11:00:33+00:00

We may want to restrict the detected platforms to only `x86_64` and `aarch64`.
There are still custom detection in api.td but I don't think we can handle these:
 - config/linux/api.td:205
 - config/linux/api.td:199

Differential Revision: https://reviews.llvm.org/D112818

Revert "[libc] Add more robust compile time architecture detection"

2021-10-29T20:25:55+00:00

This reverts commit a72e2499865b55cb007b63673100c06cc85faf97.

[libc] Add more robust compile time architecture detection

2021-10-29T20:15:12+00:00

We may want to restrict the detected platforms to only `x86_64` and `aarch64`.
There are still custom detection in api.td but I don't think we can handle these:
 - config/linux/api.td:205
 - config/linux/api.td:199

Differential Revision: https://reviews.llvm.org/D112818

[libc][NFC] Move test related pieces from FPUtil to util/UnitTest.

2021-10-29T15:37:30+00:00

Reviewed By: michaelrj

Differential Revision: https://reviews.llvm.org/D112673

[libc][NFC] Move utils/CPP to src/__support/CPP.

2021-10-28T15:50:00+00:00

The idea is to move all pieces related to the actual libc sources to the
"src" directory. This allows downstream users to ship and build just the
"src" directory.

Reviewed By: michaelrj

Differential Revision: https://reviews.llvm.org/D112653

[libc][NFC] Add supporting class for atof implementation

2021-10-04T21:08:02+00:00

This change adds the High Precision Decimal described here:
https://nigeltao.github.io/blog/2020/parse-number-f64-simple.html
It will be used for the atof implementation later, but is complete and
tested now.

The code is inspired by the golang implmentation of the HPD class, which
can be found here: https://github.com/golang/go/blob/release-branch.go1.16/src/strconv/decimal.go

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D110454

[libc] Add support for 128 bit ints in limits.h

2021-09-28T23:50:16+00:00

Also, this adds unit tests to check that limits.h complies with the C
standard.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D110643

[libc] fix string conversion tests for windows

2021-08-24T18:06:21+00:00

There were some copy paste errors as well as some oddities around how
windows handles the difference between long and long long types. This
change fixes those.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D108591

[libc] Add range reduction functions based on Paine and Hanek algorithm.

2021-08-23T05:18:41+00:00

These functions will be used in a future patch to implement
trigonometric functions. Unit tests have been added but to the
libc-long-running-tests suite. The unit tests long running because we
compare against MPFR computations performed at 1280 bits of precision.

Some cleanups or elimination of repeated patterns can be done as follow
up changes.

Differential Revision: https://reviews.llvm.org/D104817

[libc][nfc] add CPP Limits.h for numeric_limits

2021-08-12T21:31:16+00:00

Add an implementation of numeric_limits for use in str_conv_utils.
It currently only supports the basic integer types, with more types
coming as needed.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D107987