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|
/** Bitfield tests.
SDCC pic16 port currently does not support bitfields of size > 8,
so they are ifdefed out.
*/
#include <testfwk.h>
struct {
char c0_3 : 3;
char c3_5 : 5;
} c_bf;
#if !defined(SDCC_pic16)
struct {
int i0_7 : 7;
int i7_9 : 9;
} i_bf;
struct {
long l0_7 : 7;
long l7_10 : 10;
long l17_15 : 15;
} l_bf;
struct {
unsigned int b0 : 1;
unsigned int b1 : 1;
unsigned int b2 : 1;
unsigned int b3 : 1;
unsigned int b4 : 1;
unsigned int b5 : 1;
unsigned int b6 : 1;
unsigned int b7 : 1;
unsigned int b8 : 1;
unsigned int b9 : 1;
} sb_bf;
#endif /* !SDCC_pic16 */
struct {
unsigned int b0 : 1;
unsigned int b2 : 1;
} size1a_bf;
struct {
unsigned int b0 : 1;
unsigned int b1 : 1;
unsigned int : 0;
} size1b_bf;
struct {
unsigned int b0 : 1;
unsigned int b1 : 1;
unsigned int b2 : 6;
} size1c_bf;
struct {
unsigned int b0 : 1;
unsigned int : 0;
unsigned int b1 : 1;
} size2a_bf;
#if !defined(SDCC_pic16)
struct {
unsigned int b0 : 1;
unsigned int b1 : 1;
unsigned int b2 : 1;
unsigned int b3 : 1;
unsigned int b4 : 1;
unsigned int b5 : 1;
unsigned int b6 : 1;
unsigned int b7 : 1;
unsigned int b8 : 1;
unsigned int b9 : 1;
} size2b_bf;
struct {
unsigned int b0 : 4;
unsigned int b1 : 5;
} size2c_bf;
struct {
unsigned int b0 : 12;
unsigned int b1 : 3;
} size2d_bf;
struct {
unsigned int b0 : 3;
unsigned int b1 : 12;
} size3a_bf;
struct {
signed int s0_7 : 7;
signed int s7_1 : 1;
signed int s8_9 : 9;
} s_bf;
#endif /* !SDCC_pic16 */
void
testBitfieldSizeof(void)
{
/* Although bitfields are extremely implementation dependant, these
assertions should hold for all implementations with storage units
of 8 bits or larger (nearly universal).
*/
ASSERT( sizeof(size1a_bf) >= 1);
ASSERT( sizeof(size1b_bf) >= 1);
ASSERT( sizeof(size1c_bf) >= 1);
#if !defined(SDCC_pic16)
ASSERT( sizeof(size2b_bf) >= 2);
ASSERT( sizeof(size2c_bf) >= 2);
ASSERT( sizeof(size2d_bf) >= 2);
ASSERT( sizeof(size3a_bf) >= 2);
ASSERT( sizeof(size1a_bf) <= sizeof(size1b_bf));
#endif /* !SDCC_pic16 */
/* Some SDCC specific assertions. SDCC uses 8 bit storage units.
Bitfields that are less than 8 bits, but would (due to earlier
bitfield declarations) span a storage unit boundary are
realigned to the next storage unit boundary. Bitfields of
8 or greater bits are always aligned to start on a storage
unit boundary.
*/
#ifdef SDCC
ASSERT( sizeof(size1a_bf) == 1);
ASSERT( sizeof(size1b_bf) == 1);
ASSERT( sizeof(size1c_bf) == 1);
ASSERT( sizeof(size2a_bf) == 2);
#if !defined(SDCC_pic16)
ASSERT( sizeof(size2b_bf) == 2);
ASSERT( sizeof(size2c_bf) == 2);
ASSERT( sizeof(size2d_bf) == 2);
ASSERT( sizeof(size3a_bf) == 3);
#endif /* !SDCC_pic16 */
#endif
}
void
testBitfieldsSingleBitLiteral(void)
{
#if !defined(SDCC_pic16)
size2b_bf.b0 = 0;
size2b_bf.b1 = 0;
size2b_bf.b2 = 0;
size2b_bf.b3 = 0;
size2b_bf.b4 = 0;
size2b_bf.b5 = 0;
size2b_bf.b6 = 0;
size2b_bf.b7 = 0;
size2b_bf.b8 = 0;
size2b_bf.b9 = 0;
/* make sure modulo 2 truncation works */
size2b_bf.b0 = 0x3fe;
ASSERT(size2b_bf.b0==0);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==0);
size2b_bf.b0 = 0x3ff;
ASSERT(size2b_bf.b0==1);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==0);
/* make sure both bytes work */
size2b_bf.b9 = 0x3ff;
ASSERT(size2b_bf.b0==1);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==1);
#endif /* !SDCC_pic16 */
}
void
testBitfieldsSingleBit(void)
{
#if !defined(SDCC_pic16)
volatile unsigned char c;
c = 0;
size2b_bf.b0 = c;
size2b_bf.b1 = c;
size2b_bf.b2 = c;
size2b_bf.b3 = c;
size2b_bf.b4 = c;
size2b_bf.b5 = c;
size2b_bf.b6 = c;
size2b_bf.b7 = c;
size2b_bf.b8 = c;
size2b_bf.b9 = c;
/* make sure modulo 2 truncation works */
c = 0xfe;
size2b_bf.b0 = c;
ASSERT(size2b_bf.b0==0);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==0);
c++;
size2b_bf.b0 = c;
ASSERT(size2b_bf.b0==1);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==0);
/* make sure both bytes work */
size2b_bf.b9 = c;
ASSERT(size2b_bf.b0==1);
ASSERT(size2b_bf.b1==0);
ASSERT(size2b_bf.b2==0);
ASSERT(size2b_bf.b3==0);
ASSERT(size2b_bf.b4==0);
ASSERT(size2b_bf.b5==0);
ASSERT(size2b_bf.b6==0);
ASSERT(size2b_bf.b7==0);
ASSERT(size2b_bf.b8==0);
ASSERT(size2b_bf.b9==1);
#endif /* !SDCC_pic16 */
}
void
testBitfieldsMultibitLiteral(void)
{
#if !defined(SDCC_pic16)
size2c_bf.b0 = 0xff; /* should truncate to 0x0f */
size2c_bf.b1 = 0;
ASSERT(size2c_bf.b0==0x0f);
ASSERT(size2c_bf.b1==0);
size2c_bf.b1 = 0xff; /* should truncate to 0x1f */
size2c_bf.b0 = 0;
ASSERT(size2c_bf.b0==0);
ASSERT(size2c_bf.b1==0x1f);
size2c_bf.b0 = 0xff; /* should truncate to 0x0f */
size2c_bf.b1 = 0xff; /* should truncate to 0x1f */
ASSERT(size2c_bf.b0==0x0f);
ASSERT(size2c_bf.b1==0x1f);
size2d_bf.b0 = 0xffff; /* should truncate to 0x0fff */
size2d_bf.b1 = 0;
ASSERT(size2d_bf.b0==0x0fff);
ASSERT(size2d_bf.b1==0);
size2d_bf.b1 = 0xffff; /* should truncate to 0x07 */
size2d_bf.b0 = 0;
ASSERT(size2d_bf.b0==0);
ASSERT(size2d_bf.b1==0x07);
size2d_bf.b0 = 0xffff; /* should truncate to 0x0fff */
size2d_bf.b1 = 0xffff; /* should truncate to 0x07 */
ASSERT(size2d_bf.b0==0x0fff);
ASSERT(size2d_bf.b1==0x07);
size2d_bf.b0 = 0x0321;
size2d_bf.b1 = 1;
ASSERT(size2d_bf.b0==0x0321);
ASSERT(size2d_bf.b1==1);
size2d_bf.b0 = 0x0a46;
size2d_bf.b1 = 5;
ASSERT(size2d_bf.b0==0x0a46);
ASSERT(size2d_bf.b1==5);
#endif /* !SDCC_pic16 */
}
void
testBitfieldsMultibit(void)
{
#if !defined(SDCC_pic16)
volatile int allones = 0xffff;
volatile int zero = 0;
volatile int x;
size2c_bf.b0 = allones; /* should truncate to 0x0f */
size2c_bf.b1 = zero;
ASSERT(size2c_bf.b0==0x0f);
ASSERT(size2c_bf.b1==0);
size2c_bf.b1 = allones; /* should truncate to 0x1f */
size2c_bf.b0 = zero;
ASSERT(size2c_bf.b0==0);
ASSERT(size2c_bf.b1==0x1f);
size2d_bf.b0 = allones; /* should truncate to 0x0fff */
size2d_bf.b1 = zero;
ASSERT(size2d_bf.b0==0x0fff);
ASSERT(size2d_bf.b1==0);
size2d_bf.b1 = allones; /* should truncate to 0x07 */
size2d_bf.b0 = zero;
ASSERT(size2d_bf.b0==0);
ASSERT(size2d_bf.b1==0x07);
x = 0x0321;
size2d_bf.b0 = x;
x = 1;
size2d_bf.b1 = x;
ASSERT(size2d_bf.b0==0x0321);
ASSERT(size2d_bf.b1==1);
x = 0x0a46;
size2d_bf.b0 = x;
x = 5;
size2d_bf.b1 = x;
ASSERT(size2d_bf.b0==0x0a46);
ASSERT(size2d_bf.b1==5);
#endif /* !SDCC_pic16 */
}
void
testBitfields(void)
{
c_bf.c0_3 = 2;
c_bf.c3_5 = 3;
#if defined(PORT_HOST) && (defined(__ppc__) || defined(__PPC__))
/* bitfields on powerpc architecture are allocated from left to right */
ASSERT(*(char *)(&c_bf) == ((2<<(8-3)) + 3) );
#else
ASSERT(*(char *)(&c_bf) == (2 + (3<<3)) );
#endif
#if 0 // not yet
i_bf.i0_7 = 23;
i_bf.i7_9 = 234;
ASSERT(*(int *)(&i_bf) == (23 + (234<<7)) );
l_bitfield.l0_7 = 23;
l_bitfield.l7_10 = 234;
l_bitfield.l17_15 = 2345;
ASSERT(*(long *)(&l_bf) == (23 + (234<<7) + (2345<<17)) );
#endif
}
void
testSignedBitfields(void)
{
#if !defined(SDCC_pic16)
s_bf.s0_7 = 0xf0;
s_bf.s7_1 = 1;
s_bf.s8_9 = 0xfff8;
ASSERT(s_bf.s0_7 == -16);
ASSERT(s_bf.s7_1 == - 1);
ASSERT(s_bf.s8_9 == - 8);
ASSERT(s_bf.s0_7 < 0);
ASSERT(s_bf.s7_1 < 0);
ASSERT(s_bf.s8_9 < 0);
s_bf.s0_7 = 0x3f;
s_bf.s7_1 = 2;
s_bf.s8_9 = 0x00ff;
ASSERT(s_bf.s0_7 == 0x3f);
ASSERT(s_bf.s7_1 == 0);
ASSERT(s_bf.s8_9 == 0xff);
ASSERT(s_bf.s0_7 > 0);
ASSERT(s_bf.s8_9 > 0);
#endif /* !SDCC_pic16 */
}
/* test case for enhancement request #2291335 : Unnamed bit-field initialization */
struct s2291335_1 {
int a : 2;
char : 2;
int b : 2;
};
struct s2291335_2 {
int a : 2;
char : 0;
int b : 2;
};
struct s2291335_1 gs2291335_1 = {1, 2};
struct s2291335_2 gs2291335_2 = {1, 2};
void
__test2291335(void)
{
struct s2291335_1 ls2291335_1 = {1, 2};
struct s2291335_2 ls2291335_2 = {1, 2};
ASSERT(gs2291335_1.a == 1);
ASSERT(gs2291335_1.b == 2);
ASSERT(gs2291335_2.a == 1);
ASSERT(gs2291335_2.b == 2);
ASSERT(ls2291335_1.a == 1);
ASSERT(ls2291335_1.b == 2);
ASSERT(ls2291335_2.a == 1);
ASSERT(ls2291335_2.b == 2);
}
/* test case for bug #2366757: segfault when initializing structure with bitfield */
struct
{
char a : 1;
char b : 1;
} s2366757 = {0};
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