Commit Graph

21 Commits

Author SHA1 Message Date
JosJuice c00008e3cd Common: Remove unused stuff from BitUtils.h 2022-08-05 17:54:51 +02:00
TellowKrinkle 3d34a20105 Common: Fix CountTrailingZeros for weird compilers 2022-07-10 17:35:47 -05:00
Merry 20ccc38f0f BitUtils: Implement CountTrailingZeros 2022-07-10 22:17:09 +01:00
Tillmann Karras 59dfc43949 Common: replace std::aligned_storage_t with alignas
C++23 deprecates std::aligned_storage_t while alignas works since C++11.

This fixes issue 12925.
2022-06-13 00:06:19 +01:00
JosJuice 10861ed8ce JitArm64: Turn IsImmLogical into a constexpr constructor 2021-07-10 20:31:28 +02:00
Pierre Bourdon e149ad4f0a
treewide: convert GPLv2+ license info to SPDX tags
SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.
2021-07-05 04:35:56 +02:00
Shawn Hoffman fc65f65891 BitUtils: cleanup constexpr usage for msvc clz 2021-01-10 10:06:30 -08:00
Shawn Hoffman 65ecf1e43e BitUtils: loosen clz to inline on msvc/arm64 2021-01-09 23:44:00 -08:00
Shawn Hoffman 1e5e5ea855 BitUtils: initialize variables
fixes C3615 on some msvc/cmake configs
2021-01-09 22:18:29 -08:00
MerryMage 6106d6481f BitUtils: __builtin_clz is undefined when value == 0 2021-01-03 17:35:15 +00:00
iWeaker4you a636fcf230
BitUtils: Fix uint64_t gcc compile (Linux) 2020-12-28 11:50:57 +01:00
MerryMage d695fcb126 BitUtils: Add CountLeadingZeros 2020-12-27 22:56:43 +00:00
Jordan Woyak 8343dadd58 InputCommon: Add types to ControllerEmu that represent raw controller inputs and calibration data to calculate normalized input values. 2020-02-17 15:57:43 -06:00
Pokechu22 77189e74cd Implement Broadway GPIOs
SLOT_LED and the AVE ones are not implemented yet, but the other Broadway ones are.
2020-01-04 11:43:26 -08:00
Techjar 79092cdda0 Common/BitUtils: Implement BitCast(To|From)Array 2019-12-22 14:48:47 -05:00
Jordan Woyak 9c1a8891e5 WiimoteEmu: Code cleanups. 2019-02-02 19:40:31 -06:00
Jordan Woyak 0d1fbe7bbc WiimoteEmu: Major renaming and cleanup. 2019-02-02 19:40:31 -06:00
Lioncash b3292298c9
BitUtils: Add C++14/C++17 compatible equivalent of std::bit_cast from C++2a
Given bit conversions between types are quite common in emulation
(particularly when it comes to floating-point among other things) it
makes sense to provide a utility function that keeps all the boilerplate
contained; especially considering it makes it harder to accidentally
misuse std::memcpy (such as accidentally transposing arguments, etc).

Another benefit of this function is that it doesn't require separating
declarations from assignments, allowing variables to be declared const.
This makes the scenario of of uninitialized variables being used less
likely to occur.
2018-05-10 12:28:05 -04:00
Lioncash c3483a1823 CommonFuncs: Generify rotation functions and move them to BitUtils.h
These are bit manipulation functions, so they belong within BitUtils.

This also gets rid of duplicated code and avoids relying on compiler
reserved names existing or not existing to determine whether or not we
define a set of functions.

Optimizers are smart enough in GCC and clang to transform the code to a
ROR or ROL instruction in the respective functions.
2018-03-31 18:09:45 -04:00
Niels Boehm df82adca43 Add function testing whether a bitmask is valid.
This one verifies bitmasks where low bits are set to 1 (hence the name).
Any stray 0 among the lower ones or any stray 1 among the higher zeros
renders the mask invalid.

The edge cases of all zeros and all ones are considered valid masks.

It uses an efficient implementation. It's the counterpart of
https://graphics.stanford.edu/~seander/bithacks.html#DetermineIfPowerOf2
2017-06-22 20:22:53 +02:00
Lioncash 0a6f0dfb74 Common: Add bit utility header
This attempts to make some bit arithmetic more self-documenting and also
make it easier during review to identify potential off-by-one errors by
making it possible to just specify which bits are being extracted.

Functions both support the case where bits being extracted can vary and
fixed bit extraction. In the case the bits are fixed, compile-time asserts
are present to prevent accidental API usage at compile-time.

e.g. Instead of shifting and masking to get bits 10 to 15,
Common::ExtractBits<10, 15>(value) can just be done instead.
2017-01-14 11:16:02 -05:00