Viewing file:  pr6526.c (1.13 KB) -rw-r--r--
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/* Check that the XF registers are not clobbered by an integer division
that is done using double precision FPU division. */
/* { dg-do run { target { default_single_fpu && has_xf_regs } } } */
/* { dg-options "-O1 -mdiv=call-fp" } */
#include <assert.h>
#include <stdlib.h>
extern void __set_fpscr (int);
void
write_xf0 (float* f)
{
__asm__ __volatile__ ("frchg; fmov.s @%0,fr0; frchg" : : "r" (f) : "memory");
}
void
read_xf0 (float* f)
{
__asm__ __volatile__ ("frchg; fmov.s fr0,@%0; frchg" : : "r" (f) : "memory");
}
int __attribute__ ((noinline))
test_00 (int a, int b)
{
return a / b;
}
unsigned int __attribute__ ((noinline))
test_01 (unsigned a, unsigned b)
{
return a / b;
}
int __attribute__ ((noinline))
test_02 (int x)
{
return x & 0;
}
int
main (void)
{
float test_value;
int r = 0;
/* Set FPSCR.FR to 1. */
__set_fpscr (0x200000);
test_value = 123;
write_xf0 (&test_value);
r += test_00 (40, 4);
read_xf0 (&test_value);
assert (test_value == 123);
test_value = 321;
write_xf0 (&test_value);
r += test_01 (50, 5);
read_xf0 (&test_value);
assert (test_value == 321);
return test_02 (r);
}
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