| 1 | #include <ansidecl.h>
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| 2 |
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| 3 | #ifdef __IEEE_BIG_ENDIAN
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| 4 |
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| 5 | typedef union
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| 6 | {
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| 7 | double value;
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| 8 | struct
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| 9 | {
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| 10 | unsigned int sign : 1;
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| 11 | unsigned int exponent: 11;
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| 12 | unsigned int fraction0:4;
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| 13 | unsigned int fraction1:16;
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| 14 | unsigned int fraction2:16;
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| 15 | unsigned int fraction3:16;
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| 16 |
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| 17 | } number;
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| 18 | struct
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| 19 | {
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| 20 | unsigned int sign : 1;
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| 21 | unsigned int exponent: 11;
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| 22 | unsigned int quiet:1;
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| 23 | unsigned int function0:3;
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| 24 | unsigned int function1:16;
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| 25 | unsigned int function2:16;
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| 26 | unsigned int function3:16;
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| 27 | } nan;
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| 28 | struct
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| 29 | {
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| 30 | unsigned long msw;
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| 31 | unsigned long lsw;
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| 32 | } parts;
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| 33 | long aslong[2];
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| 34 | } __ieee_double_shape_type;
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| 35 |
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| 36 | #endif
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| 37 |
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| 38 | #ifdef __IEEE_LITTLE_ENDIAN
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| 39 |
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| 40 | typedef union
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| 41 | {
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| 42 | double value;
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| 43 | struct
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| 44 | {
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| 45 | #ifdef __SMALL_BITFIELDS
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| 46 | unsigned int fraction3:16;
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| 47 | unsigned int fraction2:16;
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| 48 | unsigned int fraction1:16;
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| 49 | unsigned int fraction0: 4;
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| 50 | #else
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| 51 | unsigned int fraction1:32;
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| 52 | unsigned int fraction0:20;
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| 53 | #endif
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| 54 | unsigned int exponent :11;
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| 55 | unsigned int sign : 1;
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| 56 | } number;
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| 57 | struct
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| 58 | {
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| 59 | #ifdef __SMALL_BITFIELDS
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| 60 | unsigned int function3:16;
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| 61 | unsigned int function2:16;
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| 62 | unsigned int function1:16;
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| 63 | unsigned int function0:3;
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| 64 | #else
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| 65 | unsigned int function1:32;
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| 66 | unsigned int function0:19;
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| 67 | #endif
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| 68 | unsigned int quiet:1;
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| 69 | unsigned int exponent: 11;
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| 70 | unsigned int sign : 1;
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| 71 | } nan;
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| 72 | struct
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| 73 | {
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| 74 | unsigned long lsw;
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| 75 | unsigned long msw;
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| 76 | } parts;
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| 77 |
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| 78 | long aslong[2];
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| 79 |
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| 80 | } __ieee_double_shape_type;
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| 81 |
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| 82 | #endif
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| 83 |
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| 84 | #ifdef __IEEE_BIG_ENDIAN
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| 85 | typedef union
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| 86 | {
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| 87 | float value;
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| 88 | struct
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| 89 | {
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| 90 | unsigned int sign : 1;
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| 91 | unsigned int exponent: 8;
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| 92 | unsigned int fraction0: 7;
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| 93 | unsigned int fraction1: 16;
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| 94 | } number;
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| 95 | struct
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| 96 | {
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| 97 | unsigned int sign:1;
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| 98 | unsigned int exponent:8;
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| 99 | unsigned int quiet:1;
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| 100 | unsigned int function0:6;
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| 101 | unsigned int function1:16;
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| 102 | } nan;
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| 103 | long p1;
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| 104 |
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| 105 | } __ieee_float_shape_type;
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| 106 | #endif
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| 107 |
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| 108 | #ifdef __IEEE_LITTLE_ENDIAN
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| 109 | typedef union
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| 110 | {
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| 111 | float value;
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| 112 | struct
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| 113 | {
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| 114 | unsigned int fraction0: 7;
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| 115 | unsigned int fraction1: 16;
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| 116 | unsigned int exponent: 8;
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| 117 | unsigned int sign : 1;
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| 118 | } number;
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| 119 | struct
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| 120 | {
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| 121 | unsigned int function1:16;
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| 122 | unsigned int function0:6;
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| 123 | unsigned int quiet:1;
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| 124 | unsigned int exponent:8;
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| 125 | unsigned int sign:1;
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| 126 | } nan;
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| 127 | long p1;
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| 128 |
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| 129 | } __ieee_float_shape_type;
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| 130 | #endif
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| 131 |
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| 132 | #if defined(__IEEE_BIG_ENDIAN) || defined(__IEEE_LITTLE_ENDIAN)
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| 133 |
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| 134 | double
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| 135 | copysign (x, y)
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| 136 | double x, y;
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| 137 | {
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| 138 | __ieee_double_shape_type a,b;
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| 139 | b.value = y;
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| 140 | a.value = x;
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| 141 | a.number.sign =b.number.sign;
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| 142 | return a.value;
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| 143 | }
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| 144 |
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| 145 | #else
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| 146 |
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| 147 | double
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| 148 | copysign (x, y)
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| 149 | double x, y;
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| 150 | {
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| 151 | if ((x < 0 && y > 0) || (x > 0 && y < 0))
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| 152 | return -x;
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| 153 | return x;
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| 154 | }
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| 155 |
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| 156 | #endif
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