| 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 | |
| 132 | #if defined(__IEEE_BIG_ENDIAN) || defined(__IEEE_LITTLE_ENDIAN) |
| 133 | |
| 134 | double |
| 135 | copysign (double x, double y) |
| 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 | } |
| 143 | |
| 144 | #else |
| 145 | |
| 146 | double |
| 147 | copysign (double x, double y) |
| 148 | { |
| 149 | if ((x < 0 && y > 0) || (x > 0 && y < 0)) |
| 150 | return -x; |
| 151 | return x; |
| 152 | } |
| 153 | |
| 154 | #endif |