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[libc] Add definitions to embedded AArch32/AArch64 (#142597)

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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`
This commit is contained in:
William
2025-06-06 21:05:14 +01:00
committed by GitHub
parent 34e5d8ef16
commit a75fc765d3
4 changed files with 104 additions and 65 deletions
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132
libc/docs/headers/time.rst
View File

@@ -42,72 +42,74 @@ Implementation Status
* To check date and time functions enabled for embedded system:
- `barebone-aarch64 <https://github.com/llvm/llvm-project/tree/main/libc/config/baremetal/aarch64/entrypoints.txt>`_
- `barebone-aarch32 <https://github.com/llvm/llvm-project/tree/main/libc/config/baremetal/arm/entrypoints.txt>`_
- barebone-riscv32 - to be added
+---------------------+-----------------------------------------------+-------------------+-------------------+-------------------+-------------------+
| <Func> | Linux | Windows | MacOS | Embedded | GPU |
| +---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| | x86_64 | aarch64 | aarch32 | riscv64/riscv32 | x86_64 | aarch64 | x86_64 | aarch64 | aarch32 | riscv32 | AMD | nVidia |
+=====================+=========+=========+=========+=================+=========+=========+=========+=========+=========+=========+=========+=========+
| asctime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| asctime_r | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime_r | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_getcpuclockid | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_getres | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_gettime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_nanosleep | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_settime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime_r | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| difftime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| getdate | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| gettimeofday | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| gmtime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| gmtime_r | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| localtime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| localtime_r | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| mktime | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| nanosleep | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| strftime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| strptime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| time | |check| | |check| | | |check| | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_create | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_delete | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_gettime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_getoverrun | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_settime | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
| tzset | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+
+---------------------+-----------------------------------------------+-------------------+-------------------+-----------------------------+---------+---------+
| <Func> | Linux | Windows | MacOS | Embedded | GPU |
| +---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| | x86_64 | aarch64 | aarch32 | riscv64/riscv32 | x86_64 | aarch64 | x86_64 | aarch64 | aarch64 | aarch32 | riscv32 | AMD | nVidia |
+=====================+=========+=========+=========+=================+=========+=========+=========+=========+=========+=========+=========+=========+=========+
| asctime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| asctime_r | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime_r | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_getcpuclockid | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_getres | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_gettime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_nanosleep | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| clock_settime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| ctime_r | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| difftime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| getdate | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| gettimeofday | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| gmtime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| gmtime_r | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| localtime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| localtime_r | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| mktime | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| nanosleep | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| strftime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| strptime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| time | |check| | |check| | | |check| | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_create | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_delete | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_gettime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_getoverrun | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| timer_settime | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
| tzset | | | | | | | | | | | | | |
+---------------------+---------+---------+---------+-----------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+

5
libc/include/llvm-libc-macros/baremetal/CMakeLists.txt Normal file
View File

@@ -0,0 +1,5 @@
add_header(
time_macros
HDR
time-macros.h
)

26
libc/include/llvm-libc-macros/baremetal/time-macros.h Normal file
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@@ -0,0 +1,26 @@
//===-- Definition of macros from time.h ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_MACROS_BAREMETAL_TIME_MACROS_H
#define LLVM_LIBC_MACROS_BAREMETAL_TIME_MACROS_H
#ifdef __CLK_TCK
#define CLOCKS_PER_SEC __CLK_TCK
#else
#if defined(__arm__) || defined(_M_ARM) || defined(__aarch64__) || \
defined(__arm64__) || defined(_M_ARM64)
// This default implementation of this function shall use semihosting
// Semihosting measures time in centiseconds
// https://github.com/ARM-software/abi-aa/blob/main/semihosting/semihosting.rst#sys-clock-0x10
#define CLOCKS_PER_SEC 100
#else
#define CLOCKS_PER_SEC 1000000
#endif
#endif
#endif // LLVM_LIBC_MACROS_BAREMETAL_TIME_MACROS_H

6
libc/include/llvm-libc-macros/time-macros.h
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@@ -5,8 +5,14 @@
#include "gpu/time-macros.h"
#elif defined(__linux__)
#include "linux/time-macros.h"
#elif defined(__ELF__)
#include "baremetal/time-macros.h"
#else
#define CLOCKS_PER_SEC 1000000
#endif
#define CLK_TCK CLOCKS_PER_SEC
#define TIME_UTC 1
#define TIME_MONOTONIC 2
#define TIME_ACTIVE 3