/*
- * 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.
*
* @author Mathias Heil
* @version $Id$
*/
-
#include "config.h"
#include "fltcalc.h"
#include "strcalc.h"
+#include "error.h"
-#include <math.h> /* need isnan() and isinf() (will be changed)*/
+#include <math.h>
/* undef some reused constants defined by math.h */
#ifdef NAN
# undef NAN
#endif
-#ifdef HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
+#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "xmalloc.h"
+#if !defined(HAVE_LONG_DOUBLE) || defined(__CYGWIN__)
+/* No strtold on windows and no replacement yet */
+#define strtold(s, e) strtod(s, e)
+#endif
+
/** The number of extra precision rounding bits */
#define ROUNDING_BITS 2
static int fc_exact = 1;
#if 0
-static void fail_char(const char *str, unsigned int len, int pos) {
+static void fail_char(const char *str, unsigned int len, int pos)
+{
if (*(str+pos))
printf("ERROR: Unexpected character '%c'\n", *(str + pos));
else
#endif
/** pack machine-like */
-static void *pack(const fp_value *int_float, void *packed) {
+static void *pack(const fp_value *int_float, void *packed)
+{
char *shift_val;
char *temp;
fp_value *val_buffer;
*
* @return non-zero if result is exact
*/
-static int normalize(const fp_value *in_val, fp_value *out_val, int sticky) {
+static int normalize(const fp_value *in_val, fp_value *out_val, int sticky)
+{
int exact = 1;
int hsb;
char lsb, guard, round, round_dir = 0;
/**
* calculate a + b, where a is the value with the bigger exponent
*/
-static void _fadd(const fp_value *a, const fp_value *b, fp_value *result) {
+static void _fadd(const fp_value *a, const fp_value *b, fp_value *result)
+{
char *temp;
char *exp_diff;
/**
* calculate a * b
*/
-static void _fmul(const fp_value *a, const fp_value *b, fp_value *result) {
+static void _fmul(const fp_value *a, const fp_value *b, fp_value *result)
+{
int sticky;
char *temp;
char res_sign;
/**
* calculate a / b
*/
-static void _fdiv(const fp_value *a, const fp_value *b, fp_value *result) {
+static void _fdiv(const fp_value *a, const fp_value *b, fp_value *result)
+{
int sticky;
char *temp, *dividend;
char res_sign;
}
#if 0
-static void _power_of_ten(int exp, ieee_descriptor_t *desc, char *result) {
+static void _power_of_ten(int exp, ieee_descriptor_t *desc, char *result)
+{
char *build;
char *temp;
*
* This does not clip to any integer range.
*/
-static void _trunc(const fp_value *a, fp_value *result) {
+static void _trunc(const fp_value *a, fp_value *result)
+{
/*
* When exponent == 0 all bits left of the radix point
* are the integral part of the value. For 15bit exp_size
/********
* functions defined in fltcalc.h
********/
-const void *fc_get_buffer(void) {
+const void *fc_get_buffer(void)
+{
return calc_buffer;
}
-int fc_get_buffer_length(void) {
+int fc_get_buffer_length(void)
+{
return calc_buffer_size;
}
-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;
-
- 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);
+void *fc_val_from_str(const char *str, unsigned int len, const ieee_descriptor_t *desc, void *result)
+{
+ char *buffer;
- 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) {
+fp_value *fc_val_from_ieee754(LLDBL l, const ieee_descriptor_t *desc, fp_value *result)
+{
char *temp;
int bias_res, bias_val, mant_val;
value_t srcval;
return result;
}
-LLDBL fc_val_to_ieee754(const fp_value *val) {
+LLDBL fc_val_to_ieee754(const fp_value *val)
+{
fp_value *value;
fp_value *temp = NULL;
return buildval.d;
}
-fp_value *fc_cast(const fp_value *value, const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_cast(const fp_value *value, const ieee_descriptor_t *desc, fp_value *result)
+{
char *temp;
int exp_offset, val_bias, res_bias;
else
return fc_get_snan(desc, result);
}
+ else if (value->desc.clss == INF) {
+ if (value->sign == 0)
+ return fc_get_plusinf(desc, result);
+ else
+ return fc_get_minusinf(desc, result);
+ }
/* set the descriptor of the new value */
result->desc.exponent_size = desc->exponent_size;
return result;
}
-fp_value *fc_get_max(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_max(const ieee_descriptor_t *desc, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
result->desc.exponent_size = desc->exponent_size;
return result;
}
-fp_value *fc_get_min(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_min(const ieee_descriptor_t *desc, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
fc_get_max(desc, result);
return result;
}
-fp_value *fc_get_snan(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_snan(const ieee_descriptor_t *desc, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
result->desc.exponent_size = desc->exponent_size;
return result;
}
-fp_value *fc_get_qnan(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_qnan(const ieee_descriptor_t *desc, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
result->desc.exponent_size = desc->exponent_size;
return result;
}
-fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result)
+{
+ char *mant;
+
if (result == NULL) result = calc_buffer;
result->desc.exponent_size = desc->exponent_size;
sc_val_from_ulong((1 << desc->exponent_size) - 1, _exp(result));
- sc_val_from_ulong(0, _mant(result));
+ mant = _mant(result);
+ sc_val_from_ulong(0, mant);
+ if (desc->explicit_one) {
+ sc_set_bit_at(mant, result->desc.mantissa_size + ROUNDING_BITS);
+ }
return result;
}
-fp_value *fc_get_minusinf(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_minusinf(const ieee_descriptor_t *desc, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
fc_get_plusinf(desc, result);
return result;
}
-int fc_comp(const fp_value *val_a, const fp_value *val_b) {
+int fc_comp(const fp_value *val_a, const fp_value *val_b)
+{
int mul = 1;
/*
}
}
-int fc_is_zero(const fp_value *a) {
+int fc_is_zero(const fp_value *a)
+{
return a->desc.clss == ZERO;
}
-int fc_is_negative(const fp_value *a) {
+int fc_is_negative(const fp_value *a)
+{
return a->sign;
}
-int fc_is_inf(const fp_value *a) {
+int fc_is_inf(const fp_value *a)
+{
return a->desc.clss == INF;
}
-int fc_is_nan(const fp_value *a) {
+int fc_is_nan(const fp_value *a)
+{
return a->desc.clss == NAN;
}
-int fc_is_subnormal(const fp_value *a) {
+int fc_is_subnormal(const fp_value *a)
+{
return a->desc.clss == SUBNORMAL;
}
-char *fc_print(const fp_value *val, char *buf, int buflen, unsigned base) {
+char *fc_print(const fp_value *val, char *buf, int buflen, unsigned base)
+{
char *mul_1;
LLDBL flt_val;
return buf;
}
-unsigned char fc_sub_bits(const fp_value *value, unsigned num_bits, unsigned byte_ofs) {
+unsigned char fc_sub_bits(const fp_value *value, unsigned num_bits, unsigned byte_ofs)
+{
/* this is used to cache the packed version of the value */
static char *packed_value = NULL;
}
/* Returns non-zero if the mantissa is zero, i.e. 1.0Exxx */
-int fc_zero_mantissa(const fp_value *value) {
+int fc_zero_mantissa(const fp_value *value)
+{
return sc_get_lowest_set_bit(_mant(value)) == ROUNDING_BITS + value->desc.mantissa_size;
}
/* Returns the exponent of a value. */
-int fc_get_exponent(const fp_value *value) {
+int fc_get_exponent(const fp_value *value)
+{
int exp_bias = (1 << (value->desc.exponent_size - 1)) - 1;
return sc_val_to_long(_exp(value)) - exp_bias;
}
/* Return non-zero if a given value can be converted lossless into another precision */
-int fc_can_lossless_conv_to(const fp_value *value, const ieee_descriptor_t *desc) {
+int fc_can_lossless_conv_to(const fp_value *value, const ieee_descriptor_t *desc)
+{
int v;
int exp_bias;
if (0 < v && v < (1 << desc->exponent_size) - 1) {
/* exponent can be encoded, now check the mantissa */
v = value->desc.mantissa_size + ROUNDING_BITS - sc_get_lowest_set_bit(_mant(value));
- return v < desc->mantissa_size;
+ return v <= desc->mantissa_size;
}
return 0;
}
-fc_rounding_mode_t fc_set_rounding_mode(fc_rounding_mode_t mode) {
+fc_rounding_mode_t fc_set_rounding_mode(fc_rounding_mode_t mode)
+{
if (mode == FC_TONEAREST || mode == FC_TOPOSITIVE || mode == FC_TONEGATIVE || mode == FC_TOZERO)
rounding_mode = mode;
return rounding_mode;
}
-fc_rounding_mode_t fc_get_rounding_mode(void) {
+fc_rounding_mode_t fc_get_rounding_mode(void)
+{
return rounding_mode;
}
-void init_fltcalc(int precision) {
+void init_fltcalc(int precision)
+{
if (calc_buffer == NULL) {
/* does nothing if already init */
if (precision == 0) precision = FC_DEFAULT_PRECISION;
}
}
-void finish_fltcalc (void) {
+void finish_fltcalc (void)
+{
free(calc_buffer); calc_buffer = NULL;
}
#endif
/* definition of interface functions */
-fp_value *fc_add(const fp_value *a, const fp_value *b, fp_value *result) {
+fp_value *fc_add(const fp_value *a, const fp_value *b, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
return result;
}
-fp_value *fc_sub(const fp_value *a, const fp_value *b, fp_value *result) {
+fp_value *fc_sub(const fp_value *a, const fp_value *b, fp_value *result)
+{
fp_value *temp;
if (result == NULL) result = calc_buffer;
return result;
}
-fp_value *fc_mul(const fp_value *a, const fp_value *b, fp_value *result) {
+fp_value *fc_mul(const fp_value *a, const fp_value *b, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
return result;
}
-fp_value *fc_div(const fp_value *a, const fp_value *b, fp_value *result) {
+fp_value *fc_div(const fp_value *a, const fp_value *b, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
return result;
}
-fp_value *fc_neg(const fp_value *a, fp_value *result) {
+fp_value *fc_neg(const fp_value *a, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
TRACEPRINTF(("- %s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
return result;
}
-fp_value *fc_int(const fp_value *a, fp_value *result) {
+fp_value *fc_int(const fp_value *a, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
TRACEPRINTF(("%s ", fc_print(a, buffer, sizeof(buffer), FC_PACKED)));
return result;
}
-fp_value *fc_rnd(const fp_value *a, fp_value *result) {
+fp_value *fc_rnd(const fp_value *a, fp_value *result)
+{
if (result == NULL) result = calc_buffer;
(void) a;
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");
}
/*
* convert a floating point value into an sc value ...
*/
-int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode) {
+int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode)
+{
if (a->desc.clss == NORMAL) {
int exp_bias = (1 << (a->desc.exponent_size - 1)) - 1;
int exp_val = sc_val_to_long(_exp(a)) - exp_bias;
int shift, highest;
int mantissa_size;
+ int tgt_bits;
if (a->sign && !mode_is_signed(dst_mode)) {
/* FIXME: for now we cannot convert this */
return 0;
}
+ tgt_bits = get_mode_size_bits(dst_mode);
+ if (mode_is_signed(dst_mode))
+ --tgt_bits;
+
assert(exp_val >= 0 && "floating point value not integral before fc_flt2int() call");
mantissa_size = a->desc.mantissa_size + ROUNDING_BITS;
shift = exp_val - mantissa_size;
- mantissa_size += a->desc.explicit_one;
+ if (tgt_bits < mantissa_size + 1)
+ tgt_bits = mantissa_size + 1;
if (shift > 0) {
- sc_shlI(_mant(a), shift, mantissa_size, 0, result);
+ sc_shlI(_mant(a), shift, tgt_bits, 0, result);
} else {
- sc_shrI(_mant(a), -shift, mantissa_size, 0, result);
+ sc_shrI(_mant(a), -shift, tgt_bits, 0, result);
}
/* check for overflow */
}
-unsigned fc_set_immediate_precision(unsigned bits) {
+unsigned fc_set_immediate_precision(unsigned bits)
+{
unsigned old = immediate_prec;
immediate_prec = bits;
return old;
}
-int fc_is_exact(void) {
+int fc_is_exact(void)
+{
return fc_exact;
}
projects / libfirm / blobdiff