/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "fltcalc.h"
#include "strcalc.h"
+#include "error.h"
#include <math.h>
/* undef some reused constants defined by math.h */
#include "xmalloc.h"
+#ifndef HAVE_STRTOLD
+#define strtold(s, e) strtod(s, e)
+#endif
+
/** The number of extra precision rounding bits */
#define ROUNDING_BITS 2
void *fc_val_from_str(const char *str, unsigned int len, const ieee_descriptor_t *desc, void *result)
{
-#if 0
- enum {
- START,
- LEFT_OF_DOT,
- RIGHT_OF_DOT,
- EXP_START,
- EXPONENT,
- END
- };
-
- char exp_sign;
- int exp_int, hsb, state;
-
- const char *old_str;
-
- int pos;
- char *mant_str, *exp_val, *power_val;
-
- (void) len;
- if (result == NULL) result = calc_buffer;
-
- exp_val = alloca(value_size);
- power_val = alloca(calc_buffer_size);
- mant_str = alloca((len)?(len):(strlen(str)));
-
- result->desc.exponent_size = desc->exponent_size;
- result->desc.mantissa_size = desc->mantissa_size;
- result->desc.explicit_one = desc->explicit_one;
- result->desc.clss = NORMAL;
-
- old_str = str;
- pos = 0;
- exp_int = 0;
- state = START;
-
- while (len == 0 || str-old_str < len) {
- switch (state) {
- case START:
- switch (*str) {
- case '+':
- result->sign = 0;
- state = LEFT_OF_DOT;
- str++;
- break;
-
- case '-':
- result->sign = 1;
- state = LEFT_OF_DOT;
- str++;
- break;
-
- case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
- result->sign = 0;
- state = LEFT_OF_DOT;
- break;
+ char *buffer;
- case '.':
- result->sign = 0;
- state = RIGHT_OF_DOT;
- str++;
- break;
-
- case 'n':
- case 'N':
- case 'i':
- case 'I':
- break;
-
- default:
- fail_char(old_str, len, str - old_str);
- }
- break;
-
- case LEFT_OF_DOT:
- switch (*str) {
- case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
- mant_str[pos++] = *(str++);
- break;
-
- case '.':
- state = RIGHT_OF_DOT;
- str++;
- break;
-
- case 'e':
- case 'E':
- state = EXP_START;
- str++;
- break;
-
- case '\0':
- mant_str[pos] = '\0';
- goto done;
-
- default:
- fail_char(old_str, len, str - old_str);
- }
- break;
-
- case RIGHT_OF_DOT:
- switch (*str) {
- case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
- mant_str[pos++] = *(str++);
- exp_int++;
- break;
-
- case 'e':
- case 'E':
- state = EXP_START;
- str++;
- break;
-
- case '\0':
- mant_str[pos] = '\0';
- goto done;
-
- default:
- fail_char(old_str, len, str - old_str);
- }
- break;
-
- case EXP_START:
- switch (*str) {
- case '-':
- exp_sign = 1;
- /* fall through */
- case '+':
- if (*(str-1) != 'e' && *(str-1) != 'E') fail_char(old_str, len, str - old_str);
- str++;
- break;
-
- case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
- mant_str[pos] = '\0';
- pos = 1;
- str++;
- state = EXPONENT;
- break;
-
- default:
- fail_char(old_str, len, str - old_str);
- }
- break;
-
- case EXPONENT:
- switch (*str) {
- case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
- pos++;
- str++;
- break;
-
- case '\0': goto done;
-
- default:
- fail_char(old_str, len, str - old_str);
- }
- }
- } /* switch(state) */
-
-done:
- sc_val_from_str(mant_str, strlen(mant_str), _mant(result));
-
- /* shift to put value left of radix point */
- sc_val_from_ulong(mant_size + ROUNDING_BITS, exp_val);
-
- _shift_left(_mant(result), exp_val, _mant(result));
-
- sc_val_from_ulong((1 << (exp_size - 1)) - 1, _exp(result));
-
- _normalize(result, result, 0);
-
- if (state == EXPONENT) {
- exp_int -= atoi(str-pos);
- }
-
- _power_of_ten(exp_int, &result->desc, power_val);
-
- _fdiv(result, power_val, result);
-
- return result;
-#else
/* XXX excuse of an implementation to make things work */
LLDBL val;
fp_value *tmp = alloca(calc_buffer_size);
ieee_descriptor_t tmp_desc;
- (void) len;
-#if defined(HAVE_LONG_DOUBLE) && !defined(__CYGWIN__)
- val = strtold(str, NULL);
+ buffer = alloca(len+1);
+ memcpy(buffer, str, len);
+ buffer[len] = '\0';
+ val = strtold(buffer, NULL);
+
DEBUGPRINTF(("val_from_str(%s)\n", str));
tmp_desc.exponent_size = 15;
tmp_desc.mantissa_size = 63;
tmp_desc.explicit_one = 1;
tmp_desc.clss = NORMAL;
fc_val_from_ieee754(val, &tmp_desc, tmp);
-#else
- val = strtod(str, NULL);
- DEBUGPRINTF(("val_from_str(%s)\n", str));
- tmp_desc.exponent_size = 11;
- tmp_desc.mantissa_size = 52;
- tmp_desc.explicit_one = 0;
- tmp_desc.clss = NORMAL;
- fc_val_from_ieee754(val, &tmp_desc, tmp);
-#endif /* HAVE_LONG_DOUBLE */
+
return fc_cast(tmp, desc, result);
-#endif
}
fp_value *fc_val_from_ieee754(LLDBL l, const ieee_descriptor_t *desc, fp_value *result)
else
return fc_get_snan(desc, result);
}
- else if(value->desc.clss == INF) {
+ else if (value->desc.clss == INF) {
if (value->sign == 0)
return fc_get_plusinf(desc, result);
else
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
TRACEPRINTF(("rounded to integer "));
- assert(!"fc_rnd() not yet implemented");
-
- TRACEPRINTF(("= %s\n", fc_print(result, buffer, sizeof(buffer), FC_PACKED)));
- return result;
+ panic("fc_rnd() not yet implemented");
}
/*
projects / libfirm / blobdiff