1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** ThreadX Component */
16 /** */
17 /** Thread */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22 #define TX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "tx_api.h"
28 #include "tx_thread.h"
29
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _tx_thread_fp_disable ARMv8-A */
36 /* 6.1.10 */
37 /* AUTHOR */
38 /* */
39 /* William E. Lamie, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This function disables the FP for the currently executing thread. */
44 /* */
45 /* INPUT */
46 /* */
47 /* None */
48 /* */
49 /* OUTPUT */
50 /* */
51 /* None */
52 /* */
53 /* CALLS */
54 /* */
55 /* None */
56 /* */
57 /* CALLED BY */
58 /* */
59 /* Application Code */
60 /* */
61 /* RELEASE HISTORY */
62 /* */
63 /* DATE NAME DESCRIPTION */
64 /* */
65 /* 09-30-2020 William E. Lamie Initial Version 6.1 */
66 /* 01-31-2022 Andres Mlinar Updated comments, */
67 /* resulting in version 6.1.10 */
68 /* */
69 /**************************************************************************/
_tx_thread_fp_disable(VOID)70 VOID _tx_thread_fp_disable(VOID)
71 {
72
73 TX_THREAD *thread_ptr;
74 ULONG system_state;
75
76
77 /* Pickup the current thread pointer. */
78 TX_THREAD_GET_CURRENT(thread_ptr);
79
80 /* Get the system state. */
81 system_state = TX_THREAD_GET_SYSTEM_STATE();
82
83 /* Make sure it is not NULL. */
84 if (thread_ptr != TX_NULL)
85 {
86
87 /* Thread is running... make sure the call is from the thread context. */
88 if (system_state == 0)
89 {
90
91 /* Yes, now set the FP enable flag to false in the TX_THREAD structure. */
92 thread_ptr -> tx_thread_fp_enable = TX_FALSE;
93 }
94 }
95 }
96
97
