/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 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"
-#if defined(HAVE_LONG_DOUBLE) && !defined(__CYGWIN__)
-/* No strtold on windows and no replacement yet */
+#ifndef HAVE_STRTOLD
#define strtold(s, e) strtod(s, e)
#endif
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan(x)
+static inline int isinf(double x)
+{
+ return !_finite(x) && !_isnan(x);
+}
+#endif
+
/** The number of extra precision rounding bits */
#define ROUNDING_BITS 2
#define CLEAR_BUFFER(buffer) memset(buffer, 0, calc_buffer_size)
/* our floating point value */
-struct _fp_value {
+struct fp_value {
ieee_descriptor_t desc;
char sign;
- char value[1]; /* exp[value_size] + mant[value_size] */
+ char value[1]; /* exp[value_size] + mant[value_size] */
};
#define _exp(a) &((a)->value[0])
fp_value *val_buffer;
int pos;
- temp = alloca(value_size);
- shift_val = alloca(value_size);
+ temp = (char*) alloca(value_size);
+ shift_val = (char*) alloca(value_size);
switch ((value_class_t)int_float->desc.clss) {
case NAN:
- val_buffer = alloca(calc_buffer_size);
+ val_buffer = (fp_value*) alloca(calc_buffer_size);
fc_get_qnan(&int_float->desc, val_buffer);
int_float = val_buffer;
break;
case INF:
- val_buffer = alloca(calc_buffer_size);
+ val_buffer = (fp_value*) alloca(calc_buffer_size);
fc_get_plusinf(&int_float->desc, val_buffer);
val_buffer->sign = int_float->sign;
int_float = val_buffer;
int exact = 1;
int hsb;
char lsb, guard, round, round_dir = 0;
- char *temp = alloca(value_size);
+ char *temp = (char*) alloca(value_size);
/* save rounding bits at the end */
hsb = ROUNDING_BITS + in_val->desc.mantissa_size - sc_get_highest_set_bit(_mant(in_val)) - 1;
return;
}
- temp = alloca(value_size);
- exp_diff = alloca(value_size);
+ temp = (char*) alloca(value_size);
+ exp_diff = (char*) alloca(value_size);
/* get exponent difference */
sc_sub(_exp(a), _exp(b), exp_diff);
/* if subtracting a little more than the represented value or adding a little
* more than the represented value to a negative value this, in addition to the
* still set sticky bit, takes account of the 'little more' */
- char *temp1 = alloca(calc_buffer_size);
+ char *temp1 = (char*) alloca(calc_buffer_size);
sc_val_from_ulong(1, temp1);
sc_add(temp, temp1, temp);
}
handle_NAN(a, b, result);
- temp = alloca(value_size);
+ temp = (char*) alloca(value_size);
if (result != a && result != b)
result->desc = a->desc;
handle_NAN(a, b, result);
- temp = alloca(value_size);
- dividend = alloca(value_size);
+ temp = (char*) alloca(value_size);
+ dividend = (char*) alloca(value_size);
if (result != a && result != b)
result->desc = a->desc;
_shift_left(_mant(a), temp, dividend);
{
- char *divisor = alloca(calc_buffer_size);
+ char *divisor = (char*) alloca(calc_buffer_size);
sc_val_from_ulong(1, divisor);
_shift_right(_mant(b), divisor, divisor);
sc_div(dividend, divisor, _mant(result));
/* fixme: can be exact */
fc_exact = 0;
- temp = alloca(value_size);
+ temp = (char*) alloca(value_size);
if (a != result)
result->desc = a->desc;
return calc_buffer_size;
}
-void *fc_val_from_str(const char *str, unsigned int len, const ieee_descriptor_t *desc, void *result)
+void *fc_val_from_str(const char *str, size_t len, const ieee_descriptor_t *desc, void *result)
{
char *buffer;
/* XXX excuse of an implementation to make things work */
LLDBL val;
- fp_value *tmp = alloca(calc_buffer_size);
+ fp_value *tmp = (fp_value*) alloca(calc_buffer_size);
ieee_descriptor_t tmp_desc;
- buffer = alloca(len+1);
+ buffer = (char*) alloca(len+1);
memcpy(buffer, str, len);
buffer[len] = '\0';
val = strtold(buffer, NULL);
tmp_desc.clss = NORMAL;
fc_val_from_ieee754(val, &tmp_desc, tmp);
- return fc_cast(tmp, desc, result);
+ return fc_cast(tmp, desc, (fp_value*) result);
}
fp_value *fc_val_from_ieee754(LLDBL l, const ieee_descriptor_t *desc, fp_value *result)
#endif
if (result == NULL) result = calc_buffer;
- temp = alloca(value_size);
+ temp = (char*) alloca(value_size);
/* CLEAR the buffer, else some bits might be uninitialized */
memset(result, 0, fc_get_buffer_length());
result->desc.clss = NAN;
TRACEPRINTF(("val_from_float resulted in NAN\n"));
return result;
- }
- else if (isinf(l)) {
+ } else if (isinf(l)) {
result->desc.clss = INF;
TRACEPRINTF(("val_from_float resulted in %sINF\n", (result->sign == 1) ? "-" : ""));
return result;
#endif
mantissa_size = desc.mantissa_size + desc.explicit_one;
- temp = alloca(calc_buffer_size);
+ temp = (fp_value*) alloca(calc_buffer_size);
value = fc_cast(val, &desc, temp);
sign = value->sign;
int exp_offset, val_bias, res_bias;
if (result == NULL) result = calc_buffer;
- temp = alloca(value_size);
+ temp = (char*) alloca(value_size);
if (value->desc.exponent_size == desc->exponent_size &&
value->desc.mantissa_size == desc->mantissa_size &&
char *mul_1;
LLDBL flt_val;
- mul_1 = alloca(calc_buffer_size);
+ mul_1 = (char*) alloca(calc_buffer_size);
switch (base) {
case FC_DEC:
value_size = sc_get_buffer_length();
calc_buffer_size = sizeof(fp_value) + 2*value_size - 1;
- calc_buffer = xmalloc(calc_buffer_size);
+ calc_buffer = (fp_value*) xmalloc(calc_buffer_size);
memset(calc_buffer, 0, calc_buffer_size);
DEBUGPRINTF(("init fltcalc:\n\tVALUE_SIZE = %d\ntCALC_BUFFER_SIZE = %d\n\tcalc_buffer = %p\n\n", value_size, calc_buffer_size, calc_buffer));
#ifdef HAVE_LONG_DOUBLE
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
TRACEPRINTF(("- %s ", fc_print(b, buffer, sizeof(buffer), FC_PACKED)));
- temp = alloca(calc_buffer_size);
+ temp = (fp_value*) alloca(calc_buffer_size);
memcpy(temp, b, calc_buffer_size);
temp->sign = !b->sign;
if (sc_comp(_exp(a), _exp(temp)) == -1)
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");
}
/*