* @date 2003
* @author Mathias Heil
* @version $Id$
- * @summary
+ * @brief
*
* Values are stored in a format depending upon chosen arithmetic
* module. Default uses strcalc and fltcalc.
* This implementation assumes:
* - target has IEEE-754 floating-point arithmetic.
*/
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include "config.h"
-#include <assert.h> /* assertions */
-#include <stdlib.h> /* atoi() */
-#ifdef HAVE_STRING_H
-# include <string.h> /* nice things for strings */
-#endif
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
#ifdef HAVE_STRINGS_H
-#include <strings.h> /* strings.h also includes bsd only function strcasecmp */
-#endif
-#ifdef HAVE_STDLIB_H
-# include <stdlib.h>
+#include <strings.h>
#endif
+#include <stdlib.h>
#include "tv_t.h"
-#include "set.h" /* to store tarvals in */
-#include "entity_t.h" /* needed to store pointers to entities */
+#include "set.h"
+#include "entity_t.h"
#include "irmode_t.h"
-#include "irnode.h" /* defines boolean return values (pnc_number)*/
+#include "irnode.h"
#include "strcalc.h"
#include "fltcalc.h"
#include "irtools.h"
/** A set containing all existing values. */
static struct set *values = NULL;
+/** The carry flag for SOME operations. -1 means UNDEFINED here */
+static int carry_flag = -1;
+
/** The integer overflow mode. */
static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
panic("%s:%d: Invalid tarval (null)", file, line);
}
#ifdef __GNUC__
-INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused));
+inline static void tarval_verify(tarval *tv) __attribute__ ((unused));
#endif
-INLINE static void tarval_verify(tarval *tv)
+inline static void tarval_verify(tarval *tv)
{
assert(tv);
assert(tv->mode);
case irms_internal_boolean:
/* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
- if (strcasecmp(str, "true"))
- return tarval_b_true;
- else if (strcasecmp(str, "false"))
+ if (!strcasecmp(str, "true"))
return tarval_b_true;
+ else if (!strcasecmp(str, "false"))
+ return tarval_b_false;
else
/* XXX This is C semantics */
return atoi(str) ? tarval_b_true : tarval_b_false;
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_reference:
- /* same as integer modes */
+ if (!strcasecmp(str, "null"))
+ return get_tarval_null(mode);
+ /* FALLTHROUGH */
case irms_int_number:
sc_val_from_str(str, len, NULL, mode);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
* test if negative number, 1 means 'yes'
*/
int tarval_is_negative(tarval *a) {
- assert(a);
-
if (get_mode_n_vector_elems(a->mode) > 1)
panic("vector arithmetic not implemented yet");
* comparison
*/
pn_Cmp tarval_cmp(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+ carry_flag = -1;
if (a == tarval_bad || b == tarval_bad) {
panic("Comparison with tarval_bad");
fp_value *res;
const ieee_descriptor_t *desc;
+ carry_flag = -1;
+
assert(src);
assert(dst_mode);
tarval *tarval_not(tarval *a) {
char *buffer;
- assert(a);
+ carry_flag = -1;
/* works for vector mode without changes */
tarval *tarval_neg(tarval *a) {
char *buffer;
- assert(a);
assert(mode_is_num(a->mode)); /* negation only for numerical values */
+ carry_flag = -1;
+
/* note: negation is allowed even for unsigned modes. */
if (get_mode_n_vector_elems(a->mode) > 1) {
tarval *tarval_add(tarval *a, tarval *b) {
char *buffer;
- assert(a);
- assert(b);
+ carry_flag = -1;
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
/* vector arithmetic not implemented yet */
/* modes of a,b are equal, so result has mode of a as this might be the character */
buffer = alloca(sc_get_buffer_length());
sc_add(a->value, b->value, buffer);
+ carry_flag = sc_get_bit_at(buffer, get_mode_size_bits(a->mode));
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode) {
char *buffer;
- assert(a);
- assert(b);
+ carry_flag = -1;
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
/* vector arithmetic not implemented yet */
/* modes of a,b are equal, so result has mode of a as this might be the character */
buffer = alloca(sc_get_buffer_length());
sc_sub(a->value, b->value, buffer);
+ carry_flag = sc_get_bit_at(buffer, get_mode_size_bits(a->mode));
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
tarval *tarval_mul(tarval *a, tarval *b) {
char *buffer;
- assert(a);
- assert(b);
assert(a->mode == b->mode);
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
* floating point division
*/
tarval *tarval_quo(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_float(a->mode));
+ carry_flag = -1;
+
if (no_float)
return tarval_bad;
* overflow is impossible, but look out for division by zero
*/
tarval *tarval_div(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_int(a->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
* overflow is impossible, but look out for division by zero
*/
tarval *tarval_mod(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_int(a->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
char *div_res = alloca(len);
char *mod_res = alloca(len);
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_int(a->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_abs(tarval *a) {
char *buffer;
- assert(a);
+ carry_flag = -1;
assert(mode_is_num(a->mode));
if (get_mode_n_vector_elems(a->mode) > 1) {
* bitwise and
*/
tarval *tarval_and(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert(a->mode == b->mode);
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
* bitwise or
*/
tarval *tarval_or(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert(a->mode == b->mode);
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
* bitwise exclusive or (xor)
*/
tarval *tarval_eor(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode));
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
tarval *tarval_shl(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_shr(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_shrs(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_rotl(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
* carry flag of the last operation
*/
int tarval_carry(void) {
- panic("tarval_carry() requetsed: not implemented on all operations");
- return sc_had_carry();
+ if (carry_flag == -1)
+ panic("Carry undefined for the last operation");
+ return carry_flag;
}
/*
switch (get_mode_sort(tv->mode)) {
case irms_reference:
if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
- /* fall through */
+ /* FALLTHROUGH */
case irms_int_number:
switch (mode_info->mode_output) {
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
break;
- case TVO_HEX:
case TVO_NATIVE:
+ prefix = "0x";
+ case TVO_HEX:
default:
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
break;
res = tarval_snprintf(buf, sizeof(buf), tv);
assert(res < (int) sizeof(buf) && "buffer to small for tarval_snprintf");
- printf(buf);
+ printf("%s", buf);
return res;
}
}
/* Enable/Disable floating point constant folding. */
-int tarval_enable_fp_ops(int enable) {
- int old = !no_float;
-
+void tarval_enable_fp_ops(int enable) {
no_float = !enable;
- return old;
+}
+
+int tarval_fp_ops_enabled(void) {
+ return !no_float;
}
/**
projects / libfirm / blobdiff