/*
- * 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"
+#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
typedef uint32_t UINT32;
-#ifdef HAVE_LONG_DOUBLE
-#ifdef WORDS_BIGENDIAN
typedef union {
struct {
+#ifdef WORDS_BIGENDIAN
UINT32 high;
- UINT32 mid;
- UINT32 low;
- } val;
- volatile long double d;
-} value_t;
#else
-typedef union {
- struct {
UINT32 low;
+#endif
+#ifdef HAVE_LONG_DOUBLE
UINT32 mid;
- UINT32 high;
- } val;
- volatile long double d;
-} value_t;
#endif
-#else
#ifdef WORDS_BIGENDIAN
-typedef union {
- struct {
- UINT32 high;
UINT32 low;
- } val;
- volatile double d;
-} value_t;
#else
-typedef union {
- struct {
- UINT32 low;
UINT32 high;
+#endif
} val;
+#ifdef HAVE_LONG_DOUBLE
+ volatile long double d;
+#else
volatile double d;
-} value_t;
-#endif
#endif
+} value_t;
#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])
/** Exact flag. */
static int fc_exact = 1;
-#if 0
-static void fail_char(const char *str, unsigned int len, int pos)
-{
- if (*(str+pos))
- printf("ERROR: Unexpected character '%c'\n", *(str + pos));
- else
- printf("ERROR: Unexpected end of string\n");
- while (len-- && *str) printf("%c", *str++); printf("\n");
- while (pos--) printf(" "); printf("^\n");
- /* the front end has to to check constant strings */
- exit(-1);
-}
-#endif
-
/** pack machine-like */
static void *pack(const fp_value *int_float, void *packed)
{
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)
{
-#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;
+ char *buffer;
- 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;
-
- 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);
+ fp_value *tmp = (fp_value*) alloca(calc_buffer_size);
ieee_descriptor_t tmp_desc;
- (void) len;
-#if defined(HAVE_LONG_DOUBLE) && !defined(__CYGWIN__)
- val = strtold(str, NULL);
+ buffer = (char*) 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
+
+ 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
#ifdef HAVE_LONG_DOUBLE
- TRACEPRINTF(("val_from_float(%.8X%.8X%.8X)\n", ((int*)&l)[2], ((int*)&l)[1], ((int*)&l)[0]));/* srcval.val.high, srcval.val.mid, srcval.val.low)); */
+ TRACEPRINTF(("val_from_float(%.8X%.8X%.8X)\n", srcval.val.high & 0xFFFF, srcval.val.mid, srcval.val.low));
DEBUGPRINTF(("(%d-%.4X-%.8X%.8X)\n", sign, exponent, mantissa0, mantissa1));
#else
TRACEPRINTF(("val_from_float(%.8X%.8X)\n", srcval.val.high, srcval.val.low));
#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");
}
/*
projects / libfirm / blobdiff