mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-27 08:46:06 +00:00
d04494ccc9
The GPU has much tighter requirements for handling IO functions. Previously we attempted to define the GPU as one of the platform files. Using a common interface allowed us to easily define these functions without much extra work. However, it became more clear that this was a poor fit for the GPU. The file interface uses function pointers, which prevented inlining and caused bad perfromance and resource usage on the GPU. Further, using an actual `FILE` type rather than referring to it as a host stub prevented us from usin files coming from the host on the GPU device. After talking with @sivachandra, the approach now is to simply define GPU specific versions of the functions we intend to support. Also, we are ignoring `errno` for the time being as it is unlikely we will ever care about supporting it fully. Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D157427
130 lines
2.9 KiB
ReStructuredText
130 lines
2.9 KiB
ReStructuredText
.. _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
|
|
`remote procedure call <libc_gpu_rpc>`_.
|
|
|
|
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
|
|
memcmp |check|
|
|
memcpy |check|
|
|
memmove |check|
|
|
mempcpy |check|
|
|
memrchr |check|
|
|
memset |check|
|
|
stpcpy |check|
|
|
stpncpy |check|
|
|
strcat |check|
|
|
strchr
|
|
strcmp |check|
|
|
strcpy |check|
|
|
strcspn |check|
|
|
strlcat |check|
|
|
strlcpy |check|
|
|
strlen |check|
|
|
strncat |check|
|
|
strncmp |check|
|
|
strncpy |check|
|
|
strnlen |check|
|
|
strpbrk
|
|
strrchr
|
|
strspn |check|
|
|
strstr
|
|
strtok |check|
|
|
strtok_r |check|
|
|
strdup
|
|
strndup
|
|
============= ========= ============
|
|
|
|
stdlib.h
|
|
--------
|
|
|
|
============= ========= ============
|
|
Function Name Available RPC Required
|
|
============= ========= ============
|
|
abs |check|
|
|
atoi |check|
|
|
atof |check|
|
|
atol |check|
|
|
atoll |check|
|
|
exit |check| |check|
|
|
labs |check|
|
|
llabs |check|
|
|
div |check|
|
|
ldiv |check|
|
|
lldiv |check|
|
|
strtod |check|
|
|
strtof |check|
|
|
strtol |check|
|
|
strtold |check|
|
|
strtoll |check|
|
|
strtoul |check|
|
|
strtoull |check|
|
|
============= ========= ============
|
|
|
|
inttypes.h
|
|
--------
|
|
|
|
============= ========= ============
|
|
Function Name Available RPC Required
|
|
============= ========= ============
|
|
imaxabs |check|
|
|
imaxdiv |check|
|
|
strtoimax |check|
|
|
strtoumax |check|
|
|
============= ========= ============
|
|
|
|
stdio.h
|
|
--------
|
|
|
|
============= ========= ============
|
|
Function Name Available RPC Required
|
|
============= ========= ============
|
|
puts |check| |check|
|
|
fputs |check| |check|
|
|
fclose |check|
|
|
fopen |check|
|
|
============= ========= ============
|