File: pr61306-1.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 (39 lines) | stat: -rw-r--r-- 960 bytes parent folder | download | duplicates (10) 
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
 
#ifdef __INT32_TYPE__
typedef __INT32_TYPE__ int32_t;
#else
typedef int int32_t;
#endif

#ifdef __UINT32_TYPE__
typedef __UINT32_TYPE__ uint32_t;
#else
typedef unsigned uint32_t;
#endif

#define __fake_const_swab32(x) ((uint32_t)(		      \
	(((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |    \
	(((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |    \
	(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |    \
	(( (int32_t)(x) &  (int32_t)0xff000000UL) >> 24)))

/* Previous version of bswap optimization failed to consider sign extension
   and as a result would replace an expression *not* doing a bswap by a
   bswap.  */

__attribute__ ((noinline, noclone)) uint32_t
fake_bswap32 (uint32_t in)
{
  return __fake_const_swab32 (in);
}

int
main(void)
{
  if (sizeof (int32_t) * __CHAR_BIT__ != 32)
    return 0;
  if (sizeof (uint32_t) * __CHAR_BIT__ != 32)
    return 0;
  if (fake_bswap32 (0x87654321) != 0xffffff87)
    __builtin_abort ();
  return 0;
}