File: mma-alignment.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (41 lines) | stat: -rw-r--r-- 1,264 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
/* { dg-do run } */
/* { dg-require-effective-target hard_float } */
/* { dg-options "-O2 -mhard-float" } */

#include <stdlib.h>

/* The MMA types below are enabled for pre-power10 compiles, because the
   built-ins that use them must always be initialized in case the user has
   a target attribute or pragma on a function that uses the MMA built-ins.
   Since the test below doesn't need any other MMA support, we can enable
   this test case on basically any cpu that has hard floating point
   registers.  */

struct
{
  int __attribute__ ((__aligned__)) ivar;
  __vector_pair pair;
  __vector_quad quad;
} s;

int
main (void)
{
  /* Verify default alignment is 16-byte aligned (BIGGEST_ALIGNMENT).
     This may change in the future, but that is an ABI break, so this
     hardcoded test case is here to be a noisy FAIL as a warning, in
     case the ABI change was unintended and unwanted.  An example of where
     this can break an ABI is in glibc's struct _Unwind_Exception.  */
  if (__alignof__ (s.ivar) != 16)
    abort ();

  /* Verify __vector_pair types are 32-byte aligned.  */
  if (__alignof__ (s.pair) != 32)
    abort ();

  /* Verify __vector_quad types are 64-byte aligned.  */
  if (__alignof__ (s.quad) != 64)
    abort ();

  return 0;
}