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0bc9bdf1 | 1 | /* Test if POWER vscr read by ucontext. |
dff8da6b | 2 | Copyright (C) 2018-2024 Free Software Foundation, Inc. |
0bc9bdf1 RA |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
0bc9bdf1 RA |
18 | |
19 | #include <support/check.h> | |
20 | #include <sys/auxv.h> | |
21 | #include <ucontext.h> | |
22 | #include <stdlib.h> | |
23 | #include <stdio.h> | |
24 | #include <stdint.h> | |
25 | #include <altivec.h> | |
26 | ||
27 | #define SAT 0x1 | |
28 | ||
29 | /* This test is supported only on POWER 5 or higher. */ | |
c5f65462 JM |
30 | #define PPC_CPU_SUPPORTED (PPC_FEATURE_POWER5 | PPC_FEATURE_POWER5_PLUS \ |
31 | | PPC_FEATURE_ARCH_2_05 | PPC_FEATURE_ARCH_2_06 \ | |
32 | | PPC_FEATURE2_ARCH_2_07) | |
0bc9bdf1 RA |
33 | static int |
34 | do_test (void) | |
35 | { | |
36 | ||
37 | if (!(getauxval(AT_HWCAP2) & PPC_CPU_SUPPORTED)) | |
38 | { | |
39 | if (!(getauxval(AT_HWCAP) & PPC_CPU_SUPPORTED)) | |
40 | FAIL_UNSUPPORTED("This test is unsupported on POWER < 5\n"); | |
41 | } | |
42 | ||
43 | uint32_t vscr[4] __attribute__ ((aligned (16))); | |
44 | uint32_t* vscr_ptr = vscr; | |
45 | uint32_t vscr_word; | |
46 | ucontext_t ucp; | |
56054664 RA |
47 | __vector unsigned int v0 = {0}; |
48 | __vector unsigned int v1 = {0}; | |
0bc9bdf1 RA |
49 | |
50 | /* Set SAT bit in VSCR register. */ | |
51 | asm volatile (".machine push;\n" | |
52 | ".machine \"power5\";\n" | |
064b475a | 53 | ".machine altivec;\n" |
0bc9bdf1 RA |
54 | "vspltisb %0,0;\n" |
55 | "vspltisb %1,-1;\n" | |
56 | "vpkuwus %0,%0,%1;\n" | |
57 | "mfvscr %0;\n" | |
58 | "stvx %0,0,%2;\n" | |
59 | ".machine pop;" | |
60 | : "=v" (v0), "=v" (v1) | |
61 | : "r" (vscr_ptr) | |
62 | : "memory"); | |
63 | #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ | |
64 | vscr_word = vscr[0]; | |
65 | #else | |
66 | vscr_word = vscr[3]; | |
67 | #endif | |
68 | ||
69 | if ((vscr_word & SAT) != SAT) | |
70 | { | |
71 | FAIL_EXIT1("FAIL: SAT bit is not set.\n"); | |
72 | } | |
73 | ||
74 | if (getcontext (&ucp)) | |
75 | { | |
76 | FAIL_EXIT1("FAIL: getcontext error\n"); | |
77 | } | |
78 | if (ucp.uc_mcontext.v_regs->vscr.vscr_word != vscr_word) | |
79 | { | |
80 | FAIL_EXIT1("FAIL: ucontext vscr does not match with vscr\n"); | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
85 | #include <support/test-driver.c> |