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llvm-project/libc/docs/gpu/support.rst

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[libc][Docs] Begin improving documentation for the GPU libc This patch updates some of the documentation for the GPU libc project. There is a lot of work still to be done, but this sets the general outline. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D149194
2023-04-25 16:23:07 -05:00
.. _libc_gpu_support:
===================
Supported Functions
===================
.. include:: ../check.rst
.. contents:: Table of Contents
:depth: 4
:local:
The following functions and headers are supported at least partially on the
device. Some functions are implemented fully on the GPU, while others require a
[libc][Docs] Add some motivation for the GPU libc This provides some basic motivation behind the GPU libc. Suggests are welcome. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D152028
2023-06-02 15:38:37 -05:00
`remote procedure call <libc_gpu_rpc>`_.
[libc][Docs] Begin improving documentation for the GPU libc This patch updates some of the documentation for the GPU libc project. There is a lot of work still to be done, but this sets the general outline. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D149194
2023-04-25 16:23:07 -05:00
ctype.h
-------
============= ========= ============
Function Name Available RPC Required
============= ========= ============
isalnum |check|
isalpha |check|
isascii |check|
isblank |check|
iscntrl |check|
isdigit |check|
isgraph |check|
islower |check|
isprint |check|
ispunct |check|
isspace |check|
isupper |check|
isxdigit |check|
toascii |check|
tolower |check|
toupper |check|
============= ========= ============
string.h
--------
============= ========= ============
Function Name Available RPC Required
============= ========= ============
bcmp |check|
bzero |check|
memccpy |check|
memchr |check|
memcmp |check|
memcpy |check|
memmove |check|
mempcpy |check|
memrchr |check|
memset |check|
stpcpy |check|
stpncpy |check|
strcat |check|
strchr |check|
strcmp |check|
strcpy |check|
strcspn |check|
strlcat |check|
strlcpy |check|
strlen |check|
strncat |check|
strncmp |check|
strncpy |check|
strnlen |check|
strpbrk |check|
strrchr |check|
strspn |check|
strstr |check|
strtok |check|
strtok_r |check|
strdup
strndup
============= ========= ============
stdlib.h
--------
============= ========= ============
Function Name Available RPC Required
============= ========= ============
[libc] Support the `abs` functions in the GPU libc. This patch simply enables building the integer `abs` functions for the GPU. Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D149317
2023-04-26 20:46:02 -05:00
abs |check|
[libc] Enable conversion functions on the GPU These functions were previously removed due to problems running the tests with `errno` in them. This was resolved previously by making the internal implementation of these functions use a global `errno` so that tests can still use `errno` functionality as long as they are run with a single thread. This allows us to re-enable these tests as a previous patch has also resolved the issue where the `stdlib` tests could not be hermetic due to the dependence on system rounding functions. Reviewed By: lntue Differential Revision: https://reviews.llvm.org/D153016
2023-06-15 08:18:11 -05:00
atoi |check|
atof |check|
atol |check|
atoll |check|
[libc] Fix the implementation of exit on the GPU The RPC calls all have delays associated with them. Currently the `exit` function does an async send and immediately exits the GPU. This can have the effect that the RPC server never sees the exit call and we continue. This patch changes that to first sync with the server before continuing to perform its exit. There is still a hazard here, where the kernel can complete before the RPC call reads back its response, but this is simply multi-threaded hazards. This change ensures that the server *will* always exit some time after the GPU exits. Reviewed By: JonChesterfield Differential Revision: https://reviews.llvm.org/D154112
2023-06-29 12:03:40 -05:00
exit |check| |check|
[libc] Support the `abs` functions in the GPU libc. This patch simply enables building the integer `abs` functions for the GPU. Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D149317
2023-04-26 20:46:02 -05:00
labs |check|
llabs |check|
[libc] Enable the 'div' routines on the GPU This patch simply enables the `div`, `ldiv,` and, `lldiv` functions on the GPU. This should be straightforward enough. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D154143
2023-06-29 15:03:18 -05:00
div |check|
ldiv |check|
lldiv |check|
[libc] Enable conversion functions on the GPU These functions were previously removed due to problems running the tests with `errno` in them. This was resolved previously by making the internal implementation of these functions use a global `errno` so that tests can still use `errno` functionality as long as they are run with a single thread. This allows us to re-enable these tests as a previous patch has also resolved the issue where the `stdlib` tests could not be hermetic due to the dependence on system rounding functions. Reviewed By: lntue Differential Revision: https://reviews.llvm.org/D153016
2023-06-15 08:18:11 -05:00
strtod |check|
strtof |check|
strtol |check|
strtold |check|
strtoll |check|
strtoul |check|
strtoull |check|
[libc][Docs] Begin improving documentation for the GPU libc This patch updates some of the documentation for the GPU libc project. There is a lot of work still to be done, but this sets the general outline. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D149194
2023-04-25 16:23:07 -05:00
============= ========= ============
[libc][Docs] Add support for the printing functions
2023-06-06 14:32:58 -05:00
[libc] Add GPU support for the 'inttypes.h' functions Another low hanging fruit we can put on the GPU, this ports the tests over to the hermetic framework so we can run them on the GPU. Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D154540
2023-07-05 14:18:27 -05:00
inttypes.h
--------
============= ========= ============
Function Name Available RPC Required
============= ========= ============
imaxabs |check|
imaxdiv |check|
strtoimax |check|
strtoumax |check|
============= ========= ============
[libc][Docs] Add support for the printing functions
2023-06-06 14:32:58 -05:00
stdio.h
--------
============= ========= ============
Function Name Available RPC Required
============= ========= ============
puts |check| |check|
fputs |check| |check|
============= ========= ============
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