Norimasa Okamoto / Mbed 2 deprecated pymite

python-on-a-chip online compiler

Dependencies:   mbed TSI

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more info: python-on-a-chip

vm/float.c@0:65f1469d6bfb, 2013-03-02 (annotated)

Committer:
va009039
Date:
Sat Mar 02 11:54:20 2013 +0000
Revision:
0:65f1469d6bfb
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:65f1469d6bfb 1 /*
va009039 0:65f1469d6bfb 2 # This file is Copyright 2009 Dean Hall.
va009039 0:65f1469d6bfb 3 # This file is part of the PyMite VM.
va009039 0:65f1469d6bfb 4 # This file is licensed under the MIT License.
va009039 0:65f1469d6bfb 5 # See the LICENSE file for details.
va009039 0:65f1469d6bfb 6 */
va009039 0:65f1469d6bfb 7
va009039 0:65f1469d6bfb 8
va009039 0:65f1469d6bfb 9 #undef __FILE_ID__
va009039 0:65f1469d6bfb 10 #define __FILE_ID__ 0x17
va009039 0:65f1469d6bfb 11
va009039 0:65f1469d6bfb 12
va009039 0:65f1469d6bfb 13 /**
va009039 0:65f1469d6bfb 14 * \file
va009039 0:65f1469d6bfb 15 * \brief Float Object Type
va009039 0:65f1469d6bfb 16 *
va009039 0:65f1469d6bfb 17 * Float object type operations.
va009039 0:65f1469d6bfb 18 */
va009039 0:65f1469d6bfb 19
va009039 0:65f1469d6bfb 20
va009039 0:65f1469d6bfb 21 #include "pm.h"
va009039 0:65f1469d6bfb 22
va009039 0:65f1469d6bfb 23
va009039 0:65f1469d6bfb 24 #ifdef HAVE_FLOAT
va009039 0:65f1469d6bfb 25 #include <math.h>
va009039 0:65f1469d6bfb 26
va009039 0:65f1469d6bfb 27
va009039 0:65f1469d6bfb 28 PmReturn_t
va009039 0:65f1469d6bfb 29 float_new(float f, pPmObj_t *r_pf)
va009039 0:65f1469d6bfb 30 {
va009039 0:65f1469d6bfb 31 PmReturn_t retval = PM_RET_OK;
va009039 0:65f1469d6bfb 32
va009039 0:65f1469d6bfb 33 retval = heap_getChunk(sizeof(PmFloat_t), (uint8_t **)r_pf);
va009039 0:65f1469d6bfb 34 PM_RETURN_IF_ERROR(retval);
va009039 0:65f1469d6bfb 35 OBJ_SET_TYPE(*r_pf, OBJ_TYPE_FLT);
va009039 0:65f1469d6bfb 36 ((pPmFloat_t) * r_pf)->val = f;
va009039 0:65f1469d6bfb 37 return retval;
va009039 0:65f1469d6bfb 38 }
va009039 0:65f1469d6bfb 39
va009039 0:65f1469d6bfb 40
va009039 0:65f1469d6bfb 41 #ifdef HAVE_PRINT
va009039 0:65f1469d6bfb 42
va009039 0:65f1469d6bfb 43 PmReturn_t
va009039 0:65f1469d6bfb 44 float_print(pPmObj_t pf)
va009039 0:65f1469d6bfb 45 {
va009039 0:65f1469d6bfb 46 uint8_t tBuffer[32];
va009039 0:65f1469d6bfb 47 uint8_t bytesWritten;
va009039 0:65f1469d6bfb 48 uint8_t *p;
va009039 0:65f1469d6bfb 49 PmReturn_t retval = PM_RET_OK;
va009039 0:65f1469d6bfb 50
va009039 0:65f1469d6bfb 51 C_ASSERT(pf != C_NULL);
va009039 0:65f1469d6bfb 52
va009039 0:65f1469d6bfb 53 /* Raise TypeError if obj is not an float */
va009039 0:65f1469d6bfb 54 if (OBJ_GET_TYPE(pf) != OBJ_TYPE_FLT)
va009039 0:65f1469d6bfb 55 {
va009039 0:65f1469d6bfb 56 PM_RAISE(retval, PM_RET_EX_TYPE);
va009039 0:65f1469d6bfb 57 return retval;
va009039 0:65f1469d6bfb 58 }
va009039 0:65f1469d6bfb 59
va009039 0:65f1469d6bfb 60 /* #212: Use homebrew float formatter */
va009039 0:65f1469d6bfb 61 retval = sli_ftoa(((pPmFloat_t)pf)->val, tBuffer, sizeof(tBuffer));
va009039 0:65f1469d6bfb 62 bytesWritten = sli_strlen((char *)tBuffer);
va009039 0:65f1469d6bfb 63
va009039 0:65f1469d6bfb 64 /* Remove trailing zeroes (per Python convention) */
va009039 0:65f1469d6bfb 65 for (p = &tBuffer[bytesWritten] - 1;
va009039 0:65f1469d6bfb 66 p[0] == '0' && p[-1] != '.';
va009039 0:65f1469d6bfb 67 --p, bytesWritten--);
va009039 0:65f1469d6bfb 68 ++p;
va009039 0:65f1469d6bfb 69 *p = '\0';
va009039 0:65f1469d6bfb 70
va009039 0:65f1469d6bfb 71 /* Sanity check */
va009039 0:65f1469d6bfb 72 C_ASSERT(bytesWritten != 0);
va009039 0:65f1469d6bfb 73 C_ASSERT(bytesWritten < sizeof(tBuffer));
va009039 0:65f1469d6bfb 74
va009039 0:65f1469d6bfb 75 sli_puts(tBuffer);
va009039 0:65f1469d6bfb 76 return PM_RET_OK;
va009039 0:65f1469d6bfb 77 }
va009039 0:65f1469d6bfb 78
va009039 0:65f1469d6bfb 79
va009039 0:65f1469d6bfb 80 PmReturn_t
va009039 0:65f1469d6bfb 81 float_negative(pPmObj_t pf, pPmObj_t *r_pf)
va009039 0:65f1469d6bfb 82 {
va009039 0:65f1469d6bfb 83 /* Create new int obj */
va009039 0:65f1469d6bfb 84 return float_new(-((pPmFloat_t) pf)->val, r_pf);
va009039 0:65f1469d6bfb 85 }
va009039 0:65f1469d6bfb 86
va009039 0:65f1469d6bfb 87 #endif /* HAVE_PRINT */
va009039 0:65f1469d6bfb 88
va009039 0:65f1469d6bfb 89
va009039 0:65f1469d6bfb 90 PmReturn_t
va009039 0:65f1469d6bfb 91 float_op(pPmObj_t px, pPmObj_t py, pPmObj_t *r_pn, int8_t op)
va009039 0:65f1469d6bfb 92 {
va009039 0:65f1469d6bfb 93 float x;
va009039 0:65f1469d6bfb 94 float y;
va009039 0:65f1469d6bfb 95 float r;
va009039 0:65f1469d6bfb 96 PmReturn_t retval;
va009039 0:65f1469d6bfb 97
va009039 0:65f1469d6bfb 98 /* Raise TypeError if args aren't ints or floats */
va009039 0:65f1469d6bfb 99 if (((OBJ_GET_TYPE(px) != OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 100 && (OBJ_GET_TYPE(px) != OBJ_TYPE_FLT))
va009039 0:65f1469d6bfb 101 || ((OBJ_GET_TYPE(py) != OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 102 && (OBJ_GET_TYPE(py) != OBJ_TYPE_FLT)))
va009039 0:65f1469d6bfb 103 {
va009039 0:65f1469d6bfb 104 PM_RAISE(retval, PM_RET_EX_TYPE);
va009039 0:65f1469d6bfb 105 return retval;
va009039 0:65f1469d6bfb 106 }
va009039 0:65f1469d6bfb 107
va009039 0:65f1469d6bfb 108 /* Get the values as floats */
va009039 0:65f1469d6bfb 109 if (OBJ_GET_TYPE(px) == OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 110 {
va009039 0:65f1469d6bfb 111 x = (float)((pPmInt_t)px)->val;
va009039 0:65f1469d6bfb 112 }
va009039 0:65f1469d6bfb 113 else
va009039 0:65f1469d6bfb 114 {
va009039 0:65f1469d6bfb 115 x = ((pPmFloat_t) px)->val;
va009039 0:65f1469d6bfb 116 }
va009039 0:65f1469d6bfb 117
va009039 0:65f1469d6bfb 118 if (OBJ_GET_TYPE(py) == OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 119 {
va009039 0:65f1469d6bfb 120 y = (float)((pPmInt_t)py)->val;
va009039 0:65f1469d6bfb 121 }
va009039 0:65f1469d6bfb 122 else
va009039 0:65f1469d6bfb 123 {
va009039 0:65f1469d6bfb 124 y = ((pPmFloat_t) py)->val;
va009039 0:65f1469d6bfb 125 }
va009039 0:65f1469d6bfb 126
va009039 0:65f1469d6bfb 127 /* Raise ZeroDivisionError if denominator is zero */
va009039 0:65f1469d6bfb 128 if ((y == 0.0) && ((op == '/') || (op == '%')))
va009039 0:65f1469d6bfb 129 {
va009039 0:65f1469d6bfb 130 PM_RAISE(retval, PM_RET_EX_ZDIV);
va009039 0:65f1469d6bfb 131 return retval;
va009039 0:65f1469d6bfb 132 }
va009039 0:65f1469d6bfb 133
va009039 0:65f1469d6bfb 134 /* Calculate x raised to y */
va009039 0:65f1469d6bfb 135 switch (op)
va009039 0:65f1469d6bfb 136 {
va009039 0:65f1469d6bfb 137 /* *INDENT-OFF* */
va009039 0:65f1469d6bfb 138 case '+': r = x + y; break;
va009039 0:65f1469d6bfb 139 case '-': r = x - y; break;
va009039 0:65f1469d6bfb 140 case '*': r = x * y; break;
va009039 0:65f1469d6bfb 141 case '/': r = x / y; break;
va009039 0:65f1469d6bfb 142 case '%': r = fmodf(x, y); break;
va009039 0:65f1469d6bfb 143 case 'P': r = powf(x, y); break;
va009039 0:65f1469d6bfb 144 default: r = 0.0; break;
va009039 0:65f1469d6bfb 145 /* *INDENT-ON* */
va009039 0:65f1469d6bfb 146 }
va009039 0:65f1469d6bfb 147
va009039 0:65f1469d6bfb 148 retval = float_new(r, r_pn);
va009039 0:65f1469d6bfb 149
va009039 0:65f1469d6bfb 150 return retval;
va009039 0:65f1469d6bfb 151 }
va009039 0:65f1469d6bfb 152
va009039 0:65f1469d6bfb 153 PmReturn_t
va009039 0:65f1469d6bfb 154 float_compare(pPmObj_t px, pPmObj_t py, pPmObj_t *r_pobj, PmCompare_t cmp)
va009039 0:65f1469d6bfb 155 {
va009039 0:65f1469d6bfb 156 float x;
va009039 0:65f1469d6bfb 157 float y;
va009039 0:65f1469d6bfb 158 PmReturn_t retval = PM_RET_OK;
va009039 0:65f1469d6bfb 159 int8_t t8 = 0;
va009039 0:65f1469d6bfb 160
va009039 0:65f1469d6bfb 161 /* Raise TypeError if args aren't ints or floats */
va009039 0:65f1469d6bfb 162 if (((OBJ_GET_TYPE(px) != OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 163 && (OBJ_GET_TYPE(px) != OBJ_TYPE_FLT))
va009039 0:65f1469d6bfb 164 || ((OBJ_GET_TYPE(py) != OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 165 && (OBJ_GET_TYPE(py) != OBJ_TYPE_FLT)))
va009039 0:65f1469d6bfb 166 {
va009039 0:65f1469d6bfb 167 PM_RAISE(retval, PM_RET_EX_TYPE);
va009039 0:65f1469d6bfb 168 return retval;
va009039 0:65f1469d6bfb 169 }
va009039 0:65f1469d6bfb 170
va009039 0:65f1469d6bfb 171 /* Get the values as floats */
va009039 0:65f1469d6bfb 172 if (OBJ_GET_TYPE(px) == OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 173 {
va009039 0:65f1469d6bfb 174 x = (float)((pPmInt_t)px)->val;
va009039 0:65f1469d6bfb 175 }
va009039 0:65f1469d6bfb 176 else
va009039 0:65f1469d6bfb 177 {
va009039 0:65f1469d6bfb 178 x = ((pPmFloat_t) px)->val;
va009039 0:65f1469d6bfb 179 }
va009039 0:65f1469d6bfb 180
va009039 0:65f1469d6bfb 181 if (OBJ_GET_TYPE(py) == OBJ_TYPE_INT)
va009039 0:65f1469d6bfb 182 {
va009039 0:65f1469d6bfb 183 y = (float)((pPmInt_t)py)->val;
va009039 0:65f1469d6bfb 184 }
va009039 0:65f1469d6bfb 185 else
va009039 0:65f1469d6bfb 186 {
va009039 0:65f1469d6bfb 187 y = ((pPmFloat_t) py)->val;
va009039 0:65f1469d6bfb 188 }
va009039 0:65f1469d6bfb 189
va009039 0:65f1469d6bfb 190 switch (cmp)
va009039 0:65f1469d6bfb 191 {
va009039 0:65f1469d6bfb 192 /* *INDENT-OFF* */
va009039 0:65f1469d6bfb 193 case COMP_LT: t8 = (int8_t)(x < y); break;
va009039 0:65f1469d6bfb 194 case COMP_LE: t8 = (int8_t)(x <= y); break;
va009039 0:65f1469d6bfb 195 case COMP_EQ: t8 = (int8_t)(x == y); break;
va009039 0:65f1469d6bfb 196 case COMP_NE: t8 = (int8_t)(x != y); break;
va009039 0:65f1469d6bfb 197 case COMP_GT: t8 = (int8_t)(x > y); break;
va009039 0:65f1469d6bfb 198 case COMP_GE: t8 = (int8_t)(x >= y); break;
va009039 0:65f1469d6bfb 199 case COMP_IS: t8 = (int8_t)(px == py); break;
va009039 0:65f1469d6bfb 200 case COMP_IS_NOT: t8 = (int8_t)(px != py);break;
va009039 0:65f1469d6bfb 201 case COMP_IN:
va009039 0:65f1469d6bfb 202 case COMP_NOT_IN:
va009039 0:65f1469d6bfb 203 PM_RAISE(retval, PM_RET_EX_TYPE);
va009039 0:65f1469d6bfb 204 break;
va009039 0:65f1469d6bfb 205
va009039 0:65f1469d6bfb 206 default:
va009039 0:65f1469d6bfb 207 /* Other compares are not yet supported */
va009039 0:65f1469d6bfb 208 PM_RAISE(retval, PM_RET_EX_SYS);
va009039 0:65f1469d6bfb 209 break;
va009039 0:65f1469d6bfb 210 /* *INDENT-ON* */
va009039 0:65f1469d6bfb 211 }
va009039 0:65f1469d6bfb 212 *r_pobj = (t8) ? PM_TRUE : PM_FALSE;
va009039 0:65f1469d6bfb 213
va009039 0:65f1469d6bfb 214 return retval;
va009039 0:65f1469d6bfb 215 }
va009039 0:65f1469d6bfb 216
va009039 0:65f1469d6bfb 217 #endif /* HAVE_FLOAT */