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/* bug-3184920.c
*/
#include <testfwk.h>
#include <limits.h>
typedef union registerpair {
unsigned int rp_pair;
struct {
unsigned char rp_low;
unsigned char rp_high;
} rp_bytes;
} registerpair_t;
typedef struct regs {
registerpair_t regpair_iy;
registerpair_t regpair_ix;
registerpair_t regpair_bc;
registerpair_t regpair_hl;
registerpair_t regpair_de;
registerpair_t regpair_af;
registerpair_t regpair_pc;
} regs_t;
/* register pairs */
#define regs_de regpair_de.rp_pair
/* Individual registers */
#define reg_d regpair_de.rp_bytes.rp_high
#define reg_e regpair_de.rp_bytes.rp_low
void
do_nothing(regs_t *r)
{
r->reg_d = 0xaa;
r->reg_e = 0x55;
}
void
read_values(unsigned char *a, unsigned char *b)
{
regs_t r;
r.regs_de = 0xaa55;
do_nothing(&r);
*a = r.reg_d;
*b = r.reg_e;
}
void testBug(void)
{
unsigned char p1;
unsigned char p2;
read_values(&p1, &p2);
ASSERT(p1 == 0xaa);
ASSERT(p2 == 0x55);
}
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