Viewing file:  pr61055.c (1.29 KB) -rw-r--r--
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/* { dg-do run { target { ! avr_tiny } } } */
/* { dg-options { -fno-peephole2 } } */
#include <stdlib.h>
typedef __UINT16_TYPE__ uint16_t;
typedef __INT16_TYPE__ int16_t;
typedef __UINT8_TYPE__ uint8_t;
uint8_t __attribute__((noinline,noclone))
fun_inc (uint8_t c0)
{
register uint8_t c asm ("r15") = c0;
/* Force target value into R15 (lower register) */
asm ("" : "+l" (c));
c++;
if (c >= 0x80)
c = 0;
asm ("" : "+l" (c));
return c;
}
uint8_t __attribute__((noinline,noclone))
fun_dec (uint8_t c0)
{
register uint8_t c asm ("r15") = c0;
/* Force target value into R15 (lower register) */
asm ("" : "+l" (c));
c--;
if (c < 0x80)
c = 0;
asm ("" : "+l" (c));
return c;
}
uint8_t __attribute__((noinline,noclone))
fun_neg (uint8_t c0)
{
register uint8_t c asm ("r15") = c0;
c = -c;
if (c >= 0x80)
c = 0;
return c;
}
uint16_t __attribute__((noinline,noclone))
fun_adiw (uint16_t c0)
{
register uint16_t c asm ("r24") = c0;
/* Force target value into R24 (for ADIW) */
asm ("" : "+r" (c));
c += 2;
if (c >= 0x8000)
c = 0;
asm ("" : "+r" (c));
return c;
}
int main()
{
if (fun_inc (0x7f) != 0)
abort();
if (fun_neg (0x80) != 0)
abort();
if (fun_adiw (0x7ffe) != 0)
abort();
exit (0);
return 0;
}
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