/*
- * Copyright (C) 1995-2010 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 */
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan(x)
+static inline int isinf(double x)
+{
+ return !_finite(x) && !_isnan(x);
+}
#define strtold(s, e) strtod(s, e)
+#define SIZEOF_LONG_DOUBLE_8
#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 {
- UINT32 high;
- UINT32 mid;
- UINT32 low;
- } val;
- volatile long double d;
-} value_t;
+#ifdef WORDS_BIGENDIAN
+ uint32_t high;
#else
-typedef union {
- struct {
- UINT32 low;
- UINT32 mid;
- UINT32 high;
- } val;
- volatile long double d;
-} value_t;
+ uint32_t low;
+#endif
+#ifndef SIZEOF_LONG_DOUBLE_8
+ uint32_t mid;
#endif
-#else
#ifdef WORDS_BIGENDIAN
-typedef union {
- struct {
- UINT32 high;
- UINT32 low;
- } val;
- volatile double d;
-} value_t;
+ uint32_t low;
#else
-typedef union {
- struct {
- UINT32 low;
- UINT32 high;
+ uint32_t high;
+#endif
} val;
- volatile double d;
+ volatile long double d;
} value_t;
-#endif
-#endif
#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)
{
char *buffer;
/* XXX excuse of an implementation to make things work */
- LLDBL val;
- fp_value *tmp = alloca(calc_buffer_size);
+ long double val;
+ 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)
+fp_value *fc_val_from_ieee754(long double l, const ieee_descriptor_t *desc, fp_value *result)
{
char *temp;
- int bias_res, bias_val, mant_val;
- value_t srcval;
- char sign;
- UINT32 exponent, mantissa0, mantissa1;
+ int bias_res, bias_val, mant_val;
+ value_t srcval;
+ char sign;
+ uint32_t exponent, mantissa0, mantissa1;
srcval.d = l;
bias_res = ((1 << (desc->exponent_size - 1)) - 1);
-#ifdef HAVE_LONG_DOUBLE
- mant_val = 63;
- bias_val = 0x3fff;
- sign = (srcval.val.high & 0x00008000) != 0;
- exponent = (srcval.val.high & 0x00007FFF) ;
- mantissa0 = srcval.val.mid;
- mantissa1 = srcval.val.low;
-#else /* no long double */
+#ifdef SIZEOF_LONG_DOUBLE_8
mant_val = 52;
bias_val = 0x3ff;
sign = (srcval.val.high & 0x80000000) != 0;
exponent = (srcval.val.high & 0x7FF00000) >> 20;
mantissa0 = srcval.val.high & 0x000FFFFF;
mantissa1 = srcval.val.low;
-#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)); */
- DEBUGPRINTF(("(%d-%.4X-%.8X%.8X)\n", sign, exponent, mantissa0, mantissa1));
#else
- TRACEPRINTF(("val_from_float(%.8X%.8X)\n", srcval.val.high, srcval.val.low));
- DEBUGPRINTF(("(%d-%.3X-%.5X%.8X)\n", sign, exponent, mantissa0, mantissa1));
+ mant_val = 63;
+ bias_val = 0x3fff;
+ sign = (srcval.val.high & 0x00008000) != 0;
+ exponent = (srcval.val.high & 0x00007FFF) ;
+ mantissa0 = srcval.val.mid;
+ mantissa1 = 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;
return result;
}
-LLDBL fc_val_to_ieee754(const fp_value *val)
+long double fc_val_to_ieee754(const fp_value *val)
{
fp_value *value;
fp_value *temp = NULL;
int byte_offset;
- UINT32 sign;
- UINT32 exponent;
- UINT32 mantissa0;
- UINT32 mantissa1;
+ uint32_t sign;
+ uint32_t exponent;
+ uint32_t mantissa0;
+ uint32_t mantissa1;
value_t buildval;
ieee_descriptor_t desc;
unsigned mantissa_size;
-#ifdef HAVE_LONG_DOUBLE
- desc.exponent_size = 15;
- desc.mantissa_size = 63;
- desc.explicit_one = 1;
- desc.clss = NORMAL;
-#else
+#ifdef SIZEOF_LONG_DOUBLE_8
desc.exponent_size = 11;
desc.mantissa_size = 52;
desc.explicit_one = 0;
desc.clss = NORMAL;
+#else
+ desc.exponent_size = 15;
+ desc.mantissa_size = 63;
+ desc.explicit_one = 1;
+ desc.clss = NORMAL;
#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;
for (; (byte_offset<<3) < desc.mantissa_size; byte_offset++)
mantissa0 |= sc_sub_bits(_mant(value), mantissa_size, byte_offset) << ((byte_offset - 4) << 3);
-#ifdef HAVE_LONG_DOUBLE
- buildval.val.high = sign << 15;
- buildval.val.high |= exponent;
- buildval.val.mid = mantissa0;
- buildval.val.low = mantissa1;
-#else /* no long double */
+#ifdef SIZEOF_LONG_DOUBLE_8
mantissa0 &= 0x000FFFFF; /* get rid of garbage */
buildval.val.high = sign << 31;
buildval.val.high |= exponent << 20;
buildval.val.high |= mantissa0;
buildval.val.low = mantissa1;
+#else
+ buildval.val.high = sign << 15;
+ buildval.val.high |= exponent;
+ buildval.val.mid = mantissa0;
+ buildval.val.low = mantissa1;
#endif
TRACEPRINTF(("val_to_float: %d-%x-%x%x\n", sign, exponent, mantissa0, mantissa1));
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 *fc_print(const fp_value *val, char *buf, int buflen, unsigned base)
{
char *mul_1;
- LLDBL flt_val;
+ long double flt_val;
- mul_1 = alloca(calc_buffer_size);
+ mul_1 = (char*) alloca(calc_buffer_size);
switch (base) {
case FC_DEC:
break;
default:
flt_val = fc_val_to_ieee754(val);
-#ifdef HAVE_LONG_DOUBLE
/* XXX 30 is arbitrary */
snprintf(buf, buflen, "%.30LE", flt_val);
-#else
- snprintf(buf, buflen, "%.18E", flt_val);
-#endif
}
break;
break;
default:
flt_val = fc_val_to_ieee754(val);
-#ifdef HAVE_LONG_DOUBLE
snprintf(buf, buflen, "%LA", flt_val);
-#else
- snprintf(buf, buflen, "%A", flt_val);
-#endif
}
break;
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
- DEBUGPRINTF(("\tUsing long double (1-15-64) interface\n"));
-#else
- DEBUGPRINTF(("\tUsing double (1-11-52) interface\n"));
-#endif
-#ifdef WORDS_BIGENDIAN
- DEBUGPRINTF(("\tWord order is big endian\n\n"));
-#else
- DEBUGPRINTF(("\tWord order is little endian\n\n"));
-#endif
}
}
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