modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/floatunsisf-1.c (about) 1 /* The fp-bit.c function __floatunsisf had a latent bug where guard bits 2 could be lost leading to incorrect rounding. */ 3 /* Origin: Joseph Myers <joseph@codesourcery.com> */ 4 5 extern void abort (void); 6 extern void exit (int); 7 #if __INT_MAX__ >= 0x7fffffff 8 volatile unsigned u = 0x80000081; 9 #else 10 volatile unsigned long u = 0x80000081; 11 #endif 12 volatile float f1, f2; 13 int 14 main (void) 15 { 16 f1 = (float) u; 17 f2 = (float) 0x80000081; 18 if (f1 != f2) 19 abort (); 20 exit (0); 21 }