paul@850 | 1 | /* Native functions for floating point operations. |
paul@850 | 2 | |
paul@871 | 3 | Copyright (C) 2016, 2017, 2018, 2019 Paul Boddie <paul@boddie.org.uk> |
paul@850 | 4 | |
paul@850 | 5 | This program is free software; you can redistribute it and/or modify it under |
paul@850 | 6 | the terms of the GNU General Public License as published by the Free Software |
paul@850 | 7 | Foundation; either version 3 of the License, or (at your option) any later |
paul@850 | 8 | version. |
paul@850 | 9 | |
paul@850 | 10 | This program is distributed in the hope that it will be useful, but WITHOUT |
paul@850 | 11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
paul@850 | 12 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
paul@850 | 13 | details. |
paul@850 | 14 | |
paul@850 | 15 | You should have received a copy of the GNU General Public License along with |
paul@850 | 16 | this program. If not, see <http://www.gnu.org/licenses/>. |
paul@850 | 17 | */ |
paul@850 | 18 | |
paul@850 | 19 | #include <math.h> /* pow */ |
paul@850 | 20 | #include <stdio.h> /* snprintf */ |
paul@850 | 21 | #include <errno.h> /* errno */ |
paul@850 | 22 | #include "native/common.h" |
paul@850 | 23 | #include "types.h" |
paul@850 | 24 | #include "exceptions.h" |
paul@850 | 25 | #include "ops.h" |
paul@850 | 26 | #include "progconsts.h" |
paul@850 | 27 | #include "progops.h" |
paul@850 | 28 | #include "progtypes.h" |
paul@850 | 29 | #include "main.h" |
paul@850 | 30 | |
paul@871 | 31 | /* Conversion of trailing data to a double-precision floating point number. */ |
paul@850 | 32 | |
paul@850 | 33 | static double __TOFLOAT(__attr attr) |
paul@850 | 34 | { |
paul@850 | 35 | return __get_trailing_data(attr, __builtins___float_float); |
paul@850 | 36 | } |
paul@850 | 37 | |
paul@850 | 38 | /* Numeric formatting using snprintf. |
paul@850 | 39 | NOTE: This might be moved elsewhere and used by other types. */ |
paul@850 | 40 | |
paul@850 | 41 | static __attr format_number(double n, int size) |
paul@850 | 42 | { |
paul@850 | 43 | char *s = (char *) __ALLOCATE(size, sizeof(char)); |
paul@850 | 44 | int digits; |
paul@850 | 45 | |
paul@850 | 46 | /* Allocation should raise a memory error if it fails, so this loop should |
paul@850 | 47 | terminate via the return statement or an allocation failure. */ |
paul@850 | 48 | |
paul@850 | 49 | while (1) |
paul@850 | 50 | { |
paul@850 | 51 | digits = snprintf(s, size, "%f", n); |
paul@850 | 52 | |
paul@850 | 53 | if (digits < size) |
paul@850 | 54 | { |
paul@850 | 55 | s = (char *) __REALLOCATE(s, (digits + 1) * sizeof(char)); |
paul@850 | 56 | return __new_str(s, digits); |
paul@850 | 57 | } |
paul@850 | 58 | |
paul@850 | 59 | size = digits + 1; |
paul@850 | 60 | s = (char *) __REALLOCATE(s, size * sizeof(char)); |
paul@850 | 61 | } |
paul@850 | 62 | |
paul@850 | 63 | return __NULL; |
paul@850 | 64 | } |
paul@850 | 65 | |
paul@879 | 66 | /* Floating point operations. Exceptions are raised in the signal handler. */ |
paul@850 | 67 | |
paul@850 | 68 | __attr __fn_native_float_float_add(__attr __self, __attr self, __attr other) |
paul@850 | 69 | { |
paul@850 | 70 | /* self and other interpreted as float */ |
paul@850 | 71 | double i = __TOFLOAT(self); |
paul@850 | 72 | double j = __TOFLOAT(other); |
paul@879 | 73 | return __new_float(i + j); |
paul@850 | 74 | } |
paul@850 | 75 | |
paul@850 | 76 | __attr __fn_native_float_float_sub(__attr __self, __attr self, __attr other) |
paul@850 | 77 | { |
paul@850 | 78 | /* self and other interpreted as float */ |
paul@850 | 79 | double i = __TOFLOAT(self); |
paul@850 | 80 | double j = __TOFLOAT(other); |
paul@879 | 81 | return __new_float(i - j); |
paul@850 | 82 | } |
paul@850 | 83 | |
paul@850 | 84 | __attr __fn_native_float_float_mul(__attr __self, __attr self, __attr other) |
paul@850 | 85 | { |
paul@850 | 86 | /* self and other interpreted as float */ |
paul@850 | 87 | double i = __TOFLOAT(self); |
paul@850 | 88 | double j = __TOFLOAT(other); |
paul@879 | 89 | return __new_float(i * j); |
paul@850 | 90 | } |
paul@850 | 91 | |
paul@850 | 92 | __attr __fn_native_float_float_div(__attr __self, __attr self, __attr other) |
paul@850 | 93 | { |
paul@850 | 94 | /* self and other interpreted as float */ |
paul@850 | 95 | double i = __TOFLOAT(self); |
paul@850 | 96 | double j = __TOFLOAT(other); |
paul@879 | 97 | return __new_float(i / j); |
paul@850 | 98 | } |
paul@850 | 99 | |
paul@850 | 100 | __attr __fn_native_float_float_mod(__attr __self, __attr self, __attr other) |
paul@850 | 101 | { |
paul@850 | 102 | /* self and other interpreted as float */ |
paul@850 | 103 | double i = __TOFLOAT(self); |
paul@850 | 104 | double j = __TOFLOAT(other); |
paul@879 | 105 | return __new_float(fmod(i, j)); |
paul@850 | 106 | } |
paul@850 | 107 | |
paul@850 | 108 | __attr __fn_native_float_float_neg(__attr __self, __attr self) |
paul@850 | 109 | { |
paul@850 | 110 | /* self interpreted as float */ |
paul@850 | 111 | double i = __TOFLOAT(self); |
paul@879 | 112 | return __new_float(-i); |
paul@850 | 113 | } |
paul@850 | 114 | |
paul@850 | 115 | __attr __fn_native_float_float_pow(__attr __self, __attr self, __attr other) |
paul@850 | 116 | { |
paul@850 | 117 | /* self and other interpreted as float */ |
paul@850 | 118 | double i = __TOFLOAT(self); |
paul@850 | 119 | double j = __TOFLOAT(other); |
paul@850 | 120 | double result; |
paul@850 | 121 | |
paul@850 | 122 | errno = 0; |
paul@850 | 123 | result = pow(i, j); |
paul@850 | 124 | |
paul@850 | 125 | /* Test for overflow. */ |
paul@850 | 126 | |
paul@850 | 127 | if (errno == ERANGE) |
paul@850 | 128 | __raise_overflow_error(); |
paul@850 | 129 | |
paul@850 | 130 | /* Return the result. */ |
paul@850 | 131 | return __new_float(result); |
paul@850 | 132 | } |
paul@850 | 133 | |
paul@850 | 134 | __attr __fn_native_float_float_le(__attr __self, __attr self, __attr other) |
paul@850 | 135 | { |
paul@850 | 136 | /* self and other interpreted as float */ |
paul@850 | 137 | double i = __TOFLOAT(self); |
paul@850 | 138 | double j = __TOFLOAT(other); |
paul@850 | 139 | |
paul@850 | 140 | /* Return a boolean result. */ |
paul@850 | 141 | return i <= j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 142 | } |
paul@850 | 143 | |
paul@850 | 144 | __attr __fn_native_float_float_lt(__attr __self, __attr self, __attr other) |
paul@850 | 145 | { |
paul@850 | 146 | /* self and other interpreted as float */ |
paul@850 | 147 | double i = __TOFLOAT(self); |
paul@850 | 148 | double j = __TOFLOAT(other); |
paul@850 | 149 | |
paul@850 | 150 | /* Return a boolean result. */ |
paul@850 | 151 | return i < j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 152 | } |
paul@850 | 153 | |
paul@850 | 154 | __attr __fn_native_float_float_ge(__attr __self, __attr self, __attr other) |
paul@850 | 155 | { |
paul@850 | 156 | /* self and other interpreted as float */ |
paul@850 | 157 | double i = __TOFLOAT(self); |
paul@850 | 158 | double j = __TOFLOAT(other); |
paul@850 | 159 | |
paul@850 | 160 | /* Return a boolean result. */ |
paul@850 | 161 | return i >= j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 162 | } |
paul@850 | 163 | |
paul@850 | 164 | __attr __fn_native_float_float_gt(__attr __self, __attr self, __attr other) |
paul@850 | 165 | { |
paul@850 | 166 | /* self and other interpreted as float */ |
paul@850 | 167 | double i = __TOFLOAT(self); |
paul@850 | 168 | double j = __TOFLOAT(other); |
paul@850 | 169 | |
paul@850 | 170 | /* Return a boolean result. */ |
paul@850 | 171 | return i > j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 172 | } |
paul@850 | 173 | |
paul@850 | 174 | __attr __fn_native_float_float_eq(__attr __self, __attr self, __attr other) |
paul@850 | 175 | { |
paul@850 | 176 | /* self and other interpreted as float */ |
paul@850 | 177 | double i = __TOFLOAT(self); |
paul@850 | 178 | double j = __TOFLOAT(other); |
paul@850 | 179 | |
paul@850 | 180 | /* Return a boolean result. */ |
paul@850 | 181 | return i == j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 182 | } |
paul@850 | 183 | |
paul@850 | 184 | __attr __fn_native_float_float_ne(__attr __self, __attr self, __attr other) |
paul@850 | 185 | { |
paul@850 | 186 | /* self and other interpreted as float */ |
paul@850 | 187 | double i = __TOFLOAT(self); |
paul@850 | 188 | double j = __TOFLOAT(other); |
paul@850 | 189 | |
paul@850 | 190 | /* Return a boolean result. */ |
paul@850 | 191 | return i != j ? __builtins___boolean_True : __builtins___boolean_False; |
paul@850 | 192 | } |
paul@850 | 193 | |
paul@850 | 194 | __attr __fn_native_float_float_str(__attr __self, __attr self) |
paul@850 | 195 | { |
paul@850 | 196 | /* self interpreted as float */ |
paul@850 | 197 | double i = __TOFLOAT(self); |
paul@850 | 198 | |
paul@850 | 199 | /* Return a new string. */ |
paul@850 | 200 | return format_number(i, 64); |
paul@850 | 201 | } |
paul@850 | 202 | |
paul@850 | 203 | __attr __fn_native_float_float_int(__attr __self, __attr self) |
paul@850 | 204 | { |
paul@850 | 205 | /* self interpreted as float */ |
paul@850 | 206 | double i = __TOFLOAT(self); |
paul@850 | 207 | |
paul@850 | 208 | /* NOTE: Test for conversion failure. */ |
paul@850 | 209 | return __new_int((int) i); |
paul@850 | 210 | } |
paul@850 | 211 | |
paul@850 | 212 | /* Module initialisation. */ |
paul@850 | 213 | |
paul@850 | 214 | void __main_native_float() |
paul@850 | 215 | { |
paul@850 | 216 | } |