[deliverable/binutils-gdb.git] / libiberty / copysign.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

#if defined(__IEEE_BIG_ENDIAN) || defined(__IEEE_LITTLE_ENDIAN)

double
copysign (double x, double y)
{
  __ieee_double_shape_type a,b;
  b.value = y;  
  a.value = x;
  a.number.sign =b.number.sign;
  return a.value;
}

#else

double
copysign (double x, double y)
{
  if ((x < 0 && y > 0) || (x > 0 && y < 0))
    return -x;
  return x;
}

#endif
Commit	Line	Data
252b5132 RH	1	#include <ansidecl.h>
	2
	3	#ifdef __IEEE_BIG_ENDIAN
	4
	5	typedef union
	6	{
	7	double value;
	8	struct
	9	{
	10	unsigned int sign : 1;
	11	unsigned int exponent: 11;
	12	unsigned int fraction0:4;
	13	unsigned int fraction1:16;
	14	unsigned int fraction2:16;
	15	unsigned int fraction3:16;
	16
	17	} number;
	18	struct
	19	{
	20	unsigned int sign : 1;
	21	unsigned int exponent: 11;
	22	unsigned int quiet:1;
	23	unsigned int function0:3;
	24	unsigned int function1:16;
	25	unsigned int function2:16;
	26	unsigned int function3:16;
	27	} nan;
	28	struct
	29	{
	30	unsigned long msw;
	31	unsigned long lsw;
	32	} parts;
	33	long aslong[2];
	34	} __ieee_double_shape_type;
	35
	36	#endif
	37
	38	#ifdef __IEEE_LITTLE_ENDIAN
	39
	40	typedef union
	41	{
	42	double value;
	43	struct
	44	{
	45	#ifdef __SMALL_BITFIELDS
	46	unsigned int fraction3:16;
	47	unsigned int fraction2:16;
	48	unsigned int fraction1:16;
	49	unsigned int fraction0: 4;
	50	#else
	51	unsigned int fraction1:32;
	52	unsigned int fraction0:20;
	53	#endif
	54	unsigned int exponent :11;
	55	unsigned int sign : 1;
	56	} number;
	57	struct
	58	{
	59	#ifdef __SMALL_BITFIELDS
	60	unsigned int function3:16;
	61	unsigned int function2:16;
	62	unsigned int function1:16;
	63	unsigned int function0:3;
	64	#else
65	unsigned int function1:32;
66	unsigned int function0:19;
67	#endif
68	unsigned int quiet:1;
69	unsigned int exponent: 11;
70	unsigned int sign : 1;
71	} nan;
72	struct
73	{
74	unsigned long lsw;
75	unsigned long msw;
76	} parts;
77
78	long aslong[2];
79
80	} __ieee_double_shape_type;
81
82	#endif
83
84	#ifdef __IEEE_BIG_ENDIAN
85	typedef union
86	{
87	float value;
88	struct
89	{
90	unsigned int sign : 1;
91	unsigned int exponent: 8;
92	unsigned int fraction0: 7;
93	unsigned int fraction1: 16;
94	} number;
95	struct
96	{
97	unsigned int sign:1;
98	unsigned int exponent:8;
99	unsigned int quiet:1;
100	unsigned int function0:6;
101	unsigned int function1:16;
102	} nan;
103	long p1;
104
105	} __ieee_float_shape_type;
106	#endif
107
108	#ifdef __IEEE_LITTLE_ENDIAN
109	typedef union
110	{
111	float value;
112	struct
113	{
114	unsigned int fraction0: 7;
115	unsigned int fraction1: 16;
116	unsigned int exponent: 8;
117	unsigned int sign : 1;
118	} number;
119	struct
120	{
121	unsigned int function1:16;
122	unsigned int function0:6;
123	unsigned int quiet:1;
124	unsigned int exponent:8;
125	unsigned int sign:1;
126	} nan;
127	long p1;
128
129	} __ieee_float_shape_type;
130	#endif
131
cc096b71	132	#if defined(__IEEE_BIG_ENDIAN) \|\| defined(__IEEE_LITTLE_ENDIAN)
252b5132	133
7ec2fc6f	134	double
9334f9c6	135	copysign (double x, double y)
252b5132 RH	136	{
	137	__ieee_double_shape_type a,b;
	138	b.value = y;
	139	a.value = x;
	140	a.number.sign =b.number.sign;
	141	return a.value;
	142	}
cc096b71 DD	143
	144	#else
	145
7ec2fc6f	146	double
9334f9c6	147	copysign (double x, double y)
cc096b71 DD	148	{
	149	if ((x < 0 && y > 0) \|\| (x > 0 && y < 0))
	150	return -x;
	151	return x;
	152	}
	153
	154	#endif