mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-18 02:09:03 +08:00
141 lines
2.4 KiB
C
141 lines
2.4 KiB
C
|
#include <ansidecl.h>
|
||
|
|
|
||
|
|
#ifdef __IEEE_BIG_ENDIAN
|
||
|
|
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
double value;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int sign : 1;
|
||
|
|
unsigned int exponent: 11;
|
||
|
|
unsigned int fraction0:4;
|
||
|
|
unsigned int fraction1:16;
|
||
|
|
unsigned int fraction2:16;
|
||
|
|
unsigned int fraction3:16;
|
||
|
|
|
||
|
|
} number;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int sign : 1;
|
||
|
|
unsigned int exponent: 11;
|
||
|
|
unsigned int quiet:1;
|
||
|
|
unsigned int function0:3;
|
||
|
|
unsigned int function1:16;
|
||
|
|
unsigned int function2:16;
|
||
|
|
unsigned int function3:16;
|
||
|
|
} nan;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned long msw;
|
||
|
|
unsigned long lsw;
|
||
|
|
} parts;
|
||
|
|
long aslong[2];
|
||
|
|
} __ieee_double_shape_type;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __IEEE_LITTLE_ENDIAN
|
||
|
|
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
double value;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
#ifdef __SMALL_BITFIELDS
|
||
|
|
unsigned int fraction3:16;
|
||
|
|
unsigned int fraction2:16;
|
||
|
|
unsigned int fraction1:16;
|
||
|
|
unsigned int fraction0: 4;
|
||
|
|
#else
|
||
|
|
unsigned int fraction1:32;
|
||
|
|
unsigned int fraction0:20;
|
||
|
|
#endif
|
||
|
|
unsigned int exponent :11;
|
||
|
|
unsigned int sign : 1;
|
||
|
|
} number;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
#ifdef __SMALL_BITFIELDS
|
||
|
|
unsigned int function3:16;
|
||
|
|
unsigned int function2:16;
|
||
|
|
unsigned int function1:16;
|
||
|
|
unsigned int function0:3;
|
||
|
|
#else
|
||
|
|
unsigned int function1:32;
|
||
|
|
unsigned int function0:19;
|
||
|
|
#endif
|
||
|
|
unsigned int quiet:1;
|
||
|
|
unsigned int exponent: 11;
|
||
|
|
unsigned int sign : 1;
|
||
|
|
} nan;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned long lsw;
|
||
|
|
unsigned long msw;
|
||
|
|
} parts;
|
||
|
|
|
||
|
|
long aslong[2];
|
||
|
|
|
||
|
|
} __ieee_double_shape_type;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __IEEE_BIG_ENDIAN
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
float value;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int sign : 1;
|
||
|
|
unsigned int exponent: 8;
|
||
|
|
unsigned int fraction0: 7;
|
||
|
|
unsigned int fraction1: 16;
|
||
|
|
} number;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int sign:1;
|
||
|
|
unsigned int exponent:8;
|
||
|
|
unsigned int quiet:1;
|
||
|
|
unsigned int function0:6;
|
||
|
|
unsigned int function1:16;
|
||
|
|
} nan;
|
||
|
|
long p1;
|
||
|
|
|
||
|
|
} __ieee_float_shape_type;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __IEEE_LITTLE_ENDIAN
|
||
|
|
typedef union
|
||
|
|
{
|
||
|
|
float value;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int fraction0: 7;
|
||
|
|
unsigned int fraction1: 16;
|
||
|
|
unsigned int exponent: 8;
|
||
|
|
unsigned int sign : 1;
|
||
|
|
} number;
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
unsigned int function1:16;
|
||
|
|
unsigned int function0:6;
|
||
|
|
unsigned int quiet:1;
|
||
|
|
unsigned int exponent:8;
|
||
|
|
unsigned int sign:1;
|
||
|
|
} nan;
|
||
|
|
long p1;
|
||
|
|
|
||
|
|
} __ieee_float_shape_type;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
double DEFUN(copysign, (x, y), double x AND double y)
|
||
|
|
{
|
||
|
|
__ieee_double_shape_type a,b;
|
||
|
|
b.value = y;
|
||
|
|
a.value = x;
|
||
|
|
a.number.sign =b.number.sign;
|
||
|
|
return a.value;
|
||
|
|
}
|