Reverts llvm/llvm-project#146226
The MPFR test uses `mpfr_asinpi` which requires MPFR 4.2.0 or later, but
the Buildbots are running an older version of MPFR.
See https://lab.llvm.org/buildbot/#/builders/104/builds/27743 for
example.
I said I was going to revert the PR until we have a workaround for older
versions of MPFR, but then I forgot and I just disabled the entrypoints
which doesn't fix the Buildbot builds.
The function is implemented using the following Taylor series that's
generated using [python-sympy](https://www.sympy.org/en/index.html), and
it is very accurate for |x| $$\in [0, 0.5]$$ and has been verified using
Geogebra. The range reduction is used for the rest range (0.5, 1].
$$
\frac{\arcsin(x)}{\pi} \approx
\begin{aligned}[t]
& 0.318309886183791x \\
& + 0.0530516476972984x^3 \\
& + 0.0238732414637843x^5 \\
& + 0.0142102627760621x^7 \\
& + 0.00967087327815336x^9 \\
& + 0.00712127941391293x^{11} \\
& + 0.00552355646848375x^{13} \\
& + 0.00444514782463692x^{15} \\
& + 0.00367705242846804x^{17} \\
& + 0.00310721681820837x^{19} + O(x^{21})
\end{aligned}
$$
## Geogebra graph
Closes#132210
Add `CLOCKS_PER_SEC` and the older `CLK_TCK`. Allows the user to define
a `__CLK_TCK` to override if necessary.
Also add an extra column for embedded AArch64 in `time.rst`
Main algorithm:
The Taylor series expansion of `asin(x)` is:
```math
\begin{align*}
asin(x) &= x + x^3 / 6 + 3x^5 / 40 + ... \\
&= x \cdot P(x^2) \\
&= x \cdot P(u) &\text{, where } u = x^2.
\end{align*}
```
For the fast path, we perform range reduction mod 1/64 and use degree-7
(minimax + Taylor) polynomials to approximate `P(x^2)`.
When `|x| >= 0.5`, we use the transformation:
```math
u = \frac{1 + x}{2}
```
and apply half-angle formula to reduce `asin(x)` to:
```math
\begin{align*}
asin(x) &= sign(x) \cdot \left( \frac{\pi}{2} - 2 \cdot asin(\sqrt{u}) \right) \\
&= sign(x) \cdot \left( \frac{\pi}{2} - 2 \cdot \sqrt{u} \cdot P(u) \right).
\end{align*}
```
Since `0.5 <= |x| <= 1`, `|u| <= 0.5`. So we can reuse the polynomial
evaluation of `P(u)` when `|x| < 0.5`.
For the accurate path, we redo the computations in 128-bit precision
with degree-15 (minimax + Taylor) polynomials to approximate `P(u)`.
This PR implements the following 8 functions along with the tests.
```c++
int idivr(fract, fract);
long int idivlr(long fract, long fract);
int idivk(accum, accum);
long int idivlk(long accum, long accum);
unsigned int idivur(unsigned fract, unsigned fract);
unsigned long int idivulr(unsigned long fract, unsigned long fract);
unsigned int idivuk(unsigned accum, unsigned accum);
unsigned long int idivulk(unsigned long accum, unsigned long accum);
```
ref: https://www.iso.org/standard/51126.htmlFixes#129125
---------
Signed-off-by: krishna2803 <kpandey81930@gmail.com>
The docs build action was failing with libc due to checks.rst not
existing in the expected path. This patch adjusts the path to the actual
path which seems to make everything happy. It seems like this did not
show up before as stdfix.rst was not included in a place that actually
caused it to get picked up by sphinx.
This reverts commit bada9220b87e73c0f4a498b82f883e17eda928d1.
Revert "[libc][stdfix] Implement fixed point `countlsfx` functions in llvm-libc (#125356)"
This reverts commit f2a1103b323492160d7d27a1575fbda709b49036.
[libc][docs] add cpio to documentation and include related functi…
These changes ensure that the cpio header is documented properly
with respect to the issue
(https://github.com/llvm/llvm-project/issues/122006 ).
**Changes:**
1. **cpio.yaml**: Created a new YAML file for cpio with functions
and related macros.
2. **CMakeLists.txt**: Added cpio to the documentation
directories.
3. **index.rst**: Included `cpio` in the documentation index.
---------
Co-authored-by: siya <siya@Siya.com>
These changes ensure that the `sys/wait` header is documented properly
with respect to the issue (#122006 ).
**Changes:**
1. **wait.yaml**: Created a new YAML file for `sys/wait` with functions
(`wait`, `waitid`, `waitpid`) and related macros.
2. **CMakeLists.txt**: Added `sys/wait` to the documentation
directories.
3. **index.rst**: Included `sys/wait` in the documentation index.
### Add sys/resource header's implementation status ( #122006 )
#### Changes:
1. **CMakeLists.txt**: Added `sys/resource` to the list of documentation
directories.
2. **index.rst**: Included `sys/resource` in the documentation index.
3. **resource.yaml**: Created a new YAML file for `sys/resource` with
functions and macros which manages system resources.
This PR adds documentation support for the `sys/resource` header,
including functions and macros as per the latest POSIX standards.
This pull request introduces the following changes to the project with
reference to issue ( #122006 ):
1. **Documentation Update**:
- Added a new YAML file `if.yaml` under `net` to document network
interface functions and macros.
- The `if.yaml` file includes the following functions and macros:
- Functions:
- `if_freenameindex`
- `if_indextoname`
- `if_nameindex`
- `if_nametoindex`
- Macros:
- `IF_NAMESIZE`
2. **CMake Configuration Update**:
- Updated the `CMakeLists.txt` file to create the necessary directory
for the `net` headers.
- Included the `net/if` documentation in the Sphinx build configuration.
3. **Index Update**:
- Updated the `index.rst` file to include a reference to the newly added
`net/if` documentation.
**Purpose**:
- This pull request adds documentation for network interface functions
and macros, ensuring they are included in the project's documentation.
- Updates the CMake configuration to support the new documentation.
**Testing**:
- Verified that the new YAML file is correctly referenced in the
`index.rst`.
- Ensured that the documentation builds without errors and includes the
new network interface documentation.
Co-authored-by: Nick Desaulniers <ndesaulniers@google.com>
This pull request introduces the following changes to the project with
reference to ( #122006 ):
1. **Documentation Update**:
- Added a new YAML file `in.yaml` to document network protocol and
address macros.
- The `in.yaml` file includes the following macros:
- `IPPROTO_IP`
- `IPPROTO_IPV6`
- `IPPROTO_ICMP`
- `IPPROTO_RAW`
- `IPPROTO_TCP`
- `IPPROTO_UDP`
- `INADDR_ANY`
- `INADDR_BROADCAST`
- `INET_ADDRSTRLEN`
- `IPV6_JOIN_GROUP`
- `IPV6_LEAVE_GROUP`
- `IPV6_MULTICAST_HOPS`
- `IPV6_MULTICAST_IF`
- `IPV6_MULTICAST_LOOP`
- `IPV6_UNICAST_HOPS`
- `IPV6_V6ONLY`
- `IN6_IS_ADDR_UNSPECIFIED`
- `IN6_IS_ADDR_LOOPBACK`
- `IN6_IS_ADDR_MULTICAST`
- `IN6_IS_ADDR_LINKLOCAL`
- `IN6_IS_ADDR_SITELOCAL`
- `IN6_IS_ADDR_V4MAPPED`
- `IN6_IS_ADDR_V4COMPAT`
- `IN6_IS_ADDR_MC_NODELOCAL`
- `IN6_IS_ADDR_MC_LINKLOCAL`
- `IN6_IS_ADDR_MC_SITELOCAL`
- `IN6_IS_ADDR_MC_ORGLOCAL`
- `IN6_IS_ADDR_MC_GLOBAL`
_I believe, all these macros are necessary and should be documented._
2. **CMake Configuration Update**:
- Updated the `CMakeLists.txt` file to create the necessary directory
for the `netinet` headers.
- Included the `netinet/in` documentation in the Sphinx build
configuration.
3. **Index Update**:
- Updated the `index.rst` file to include a reference to the newly added
`netinet/in` documentation.
**Purpose**:
- This pull request adds documentation for network protocol and address
macros in the `netinet/in` header.
- Updates the CMake configuration to support the new documentation.
**Testing**:
- Verified that the new YAML file is correctly referenced in the
`index.rst`.
- Ensured that the documentation builds without errors and includes the
new network interface documentation.
This pull request ensures that the `netinet/in` header macros are
documented and included in the project's documentation, and updates the
CMake configuration to support these changes.
Now, `ninja docs-libc-html` will re-run docgen.
Previously, we would run docgen offline, and commit the result.
Now we no longer need to do that; docgen is invoked from the
dependencies of the `docs-libc-html` target on demand. This
commit removes the dynamically generated .rst files (keeping
the static ones that haven't been converted to docgen), and
fixes up some mistakes I failed to cleanup recently since I
didn't have such automation in place to catch such bugs.
