#ifdef HAVE_STRINGS_H
#include <strings.h> /* strings.h also includes bsd only function strcasecmp */
#endif
-#include <stdlib.h>
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif
#include "tv_t.h"
#include "set.h" /* to store tarvals in */
-/* #include "tune.h" */ /* some constants */
#include "entity_t.h" /* needed to store pointers to entities */
#include "irmode_t.h"
#include "irnode.h" /* defines boolean return values (pnc_number)*/
#include "strcalc.h"
#include "fltcalc.h"
+#include "irtools.h"
+#include "xmalloc.h"
+#include "firm_common.h"
/** Size of hash tables. Should correspond to average number of distinct constant
target values */
#define GET_OVERFLOW_MODE() int_overflow_mode
/* unused, float to int doesn't work yet */
-#define TRUNCATE 1
-#define ROUND 2
+enum float_to_int_mode {
+ TRUNCATE,
+ ROUND
+};
+
#define GET_FLOAT_TO_INT_MODE() TRUNCATE
#define SWITCH_NOINFINITY 0
static int hash_tv(tarval *tv)
{
- return ((unsigned int)tv->value ^ (unsigned int)tv->mode) + tv->length;
+ return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
}
static int hash_val(const void *value, unsigned int length)
return hash;
}
-/* finds tarval with value/mode or creates new tarval */
+/** finds tarval with value/mode or creates new tarval */
static tarval *get_tarval(const void *value, int length, ir_mode *mode)
{
tarval tv;
- tv.mode = mode;
+ tv.kind = k_tarval;
+ tv.mode = mode;
tv.length = length;
if (length > 0) {
/* if there already is such a value, it is returned, else value
case TV_OVERFLOW_WRAP:
{
char *temp = alloca(sc_get_buffer_length());
- char *diff = alloca(sc_get_buffer_length());
- sc_sub(get_mode_max(mode)->value, get_mode_min(mode)->value, diff);
- sc_val_from_ulong(1, temp);
- sc_add(diff, temp, diff);
- sc_sub(value, diff, temp);
- while (sc_comp(temp, get_mode_max(mode)->value) == 1)
- sc_sub(temp, diff, temp);
+ sc_val_from_ulong(-1, temp);
+ sc_and(temp, value, temp);
return get_tarval(temp, length, mode);
}
case TV_OVERFLOW_BAD:
case TV_OVERFLOW_WRAP:
{
char *temp = alloca(sc_get_buffer_length());
- char *diff = alloca(sc_get_buffer_length());
- sc_sub(get_mode_max(mode)->value, get_mode_min(mode)->value, diff);
- sc_val_from_ulong(1, temp);
- sc_add(diff, temp, diff);
- sc_add(value, diff, temp);
- while (sc_comp(temp, get_mode_max(mode)->value) == 1)
- sc_add(temp, diff, temp);
+ sc_val_from_ulong(-1, temp);
+ sc_and(temp, value, temp);
return get_tarval(temp, length, mode);
}
case TV_OVERFLOW_BAD:
return get_mode_null(mode);
}
break;
+
default:
break;
}
return get_tarval(value, length, mode);
}
-
/*
* public variables declared in tv.h
*/
-static tarval reserved_tv[5];
+static tarval reserved_tv[4];
tarval *tarval_bad = &reserved_tv[0];
tarval *tarval_undefined = &reserved_tv[1];
tarval *tarval_b_false = &reserved_tv[2];
tarval *tarval_b_true = &reserved_tv[3];
-tarval *tarval_P_void = &reserved_tv[4];
/*
* public functions declared in tv.h
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
+ case irms_reference:
+ /* same as integer modes */
case irms_int_number:
case irms_character:
- sc_val_from_str(str, len, NULL);
+ sc_val_from_str(str, len, NULL, mode);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
-
- case irms_reference:
- return get_tarval(str, len, mode);
}
assert(0); /* can't be reached, can it? */
tarval *new_tarval_from_long(long l, ir_mode *mode)
{
ANNOUNCE();
- assert(mode && !((get_mode_sort(mode) == irms_memory)||(get_mode_sort(mode)==irms_control_flow)||(get_mode_sort(mode)==irms_auxiliary)));
+ assert(mode);
switch(get_mode_sort(mode))
{
/* XXX C semantics ! */
return l ? tarval_b_true : tarval_b_false ;
+ case irms_reference:
+ /* same as integer modes */
case irms_int_number:
case irms_character:
sc_val_from_long(l, NULL);
case irms_float_number:
return new_tarval_from_double((long double)l, mode);
- case irms_reference:
- return l ? tarval_bad : get_tarval(NULL, 0, mode); /* null pointer or tarval_bad */
-
default:
- assert(0);
+ assert(0 && "unsupported mode sort");
}
return NULL;
}
/* returns non-zero if can be converted to long */
int tarval_is_long(tarval *tv)
{
+ mode_sort sort = get_mode_sort(tv->mode);
+
ANNOUNCE();
- if (get_mode_sort(tv->mode) != irms_int_number) return 0;
+ if (sort != irms_int_number && sort != irms_character) return 0;
if (get_mode_size_bits(tv->mode) > sizeof(long)<<3)
{
/*
* Access routines for tarval fields ========================================
*/
-ir_mode *get_tarval_mode (tarval *tv) /* get the mode of the tarval */
-{
- ANNOUNCE();
- assert(tv);
- return tv->mode;
-}
-/*
-void *get_tarval_link (tarval *tv)
-{
- ANNOUNCE ();
- assert (tv);
- return (tv->link);
+/* get the mode of the tarval */
+ir_mode *(get_tarval_mode)(const tarval *tv) {
+ return _get_tarval_mode(tv);
}
-*/
/*
* Special value query functions ============================================
* therefore the irmode functions should be prefered to the functions below.
*/
-tarval *get_tarval_bad(void)
-{
- ANNOUNCE();
- return tarval_bad;
+tarval *(get_tarval_bad)(void) {
+ return _get_tarval_bad();
}
-tarval *get_tarval_undefined(void)
-{
- ANNOUNCE();
- return tarval_undefined;
-}
-tarval *get_tarval_b_false(void)
-{
- ANNOUNCE();
- return tarval_b_false;
+
+tarval *(get_tarval_undefined)(void) {
+ return _get_tarval_undefined();
}
-tarval *get_tarval_b_true(void)
-{
- ANNOUNCE();
- return tarval_b_true;
+
+tarval *(get_tarval_b_false)(void) {
+ return _get_tarval_b_false();
}
-tarval *get_tarval_P_void(void)
-{
- ANNOUNCE();
- return tarval_P_void;
+
+tarval *(get_tarval_b_true)(void) {
+ return _get_tarval_b_true();
}
tarval *get_tarval_max(ir_mode *mode)
return tarval_bad;
}
+static long _null_value;
+
tarval *get_tarval_null(ir_mode *mode)
{
ANNOUNCE();
return new_tarval_from_long(0l, mode);
case irms_reference:
- return tarval_P_void;
+ return new_tarval_from_long(_null_value, mode);
}
return tarval_bad;
}
assert(a);
assert(b);
- if (a == tarval_bad || b == tarval_bad) assert(0 && "Comparison with tarval_bad");
- if (a == tarval_undefined || b == tarval_undefined) return pn_Cmp_False;
- if (a == b) return pn_Cmp_Eq;
- if (a->mode != b->mode) return pn_Cmp_False;
+ if (a == tarval_bad || b == tarval_bad) {
+ assert(0 && "Comparison with tarval_bad");
+ return pn_Cmp_False;
+ }
+
+ if (a == tarval_undefined || b == tarval_undefined)
+ return pn_Cmp_False;
+
+ if (a->mode != b->mode)
+ return pn_Cmp_False;
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
case irms_memory:
case irms_auxiliary:
case irms_reference:
+ if (a == b)
+ return pn_Cmp_Eq;
return pn_Cmp_False;
case irms_float_number:
+ /*
+ * BEWARE: we cannot compare a == b here, because
+ * a NaN is always Unordered to any other value, even to itself!
+ */
switch (fc_comp(a->value, b->value)) {
case -1: return pn_Cmp_Lt;
- case 0: assert(0 && "different tarvals compare equal"); return pn_Cmp_Eq;
+ case 0: return pn_Cmp_Eq;
case 1: return pn_Cmp_Gt;
case 2: return pn_Cmp_Uo;
default: return pn_Cmp_False;
}
case irms_int_number:
case irms_character:
+ if (a == b)
+ return pn_Cmp_Eq;
return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
case irms_internal_boolean:
+ if (a == b)
+ return pn_Cmp_Eq;
return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
}
return pn_Cmp_False;
fc_rnd(src->value, NULL);
break;
default:
+ assert(0);
break;
}
- /* XXX floating point unit can't produce a value in integer
+ /* FIXME: floating point unit can't produce a value in integer
* representation
* an intermediate representation is needed here first. */
/* return get_tarval(); */
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
+ case irms_reference:
+ /* allow 0 to be casted */
+ if (src == get_mode_null(src->mode))
+ return get_mode_null(m);
+ break;
+
default:
break;
}
ANNOUNCE();
assert(a);
- assert(mode_is_int(a->mode)); /* bitwise negation is only allowed for integer */
/* works for vector mode without changes */
sc_not(a->value, buffer);
return get_tarval(buffer, a->length, a->mode);
+ case irms_internal_boolean:
+ if (a == tarval_b_true)
+ return tarval_b_false;
+ if (a == tarval_b_false)
+ return tarval_b_true;
+ return tarval_bad;
+
default:
+ assert(0 && "bitwise negation is only allowed for integer and boolean");
return tarval_bad;
}
}
break;
case irms_reference:
- if (tv == tarval_P_void) return snprintf(buf, len, "NULL");
- if (tv->value != NULL){
- if (len > tv->length) {
- memcpy(buf, tv->value, tv->length);
- buf[tv->length] = '\0';
- }
- else {
- /* truncated */
- memcpy(buf, tv->value, len-1);
- buf[len-1] = '\0';
+ if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
+ if (tv->value != NULL) {
+ if (len > tv->length) {
+ memcpy(buf, tv->value, tv->length);
+ buf[tv->length] = '\0';
+ }
+ else {
+ /* truncated */
+ memcpy(buf, tv->value, len-1);
+ buf[len-1] = '\0';
+ }
+ return tv->length;
}
- return tv->length;
- }
else
- return snprintf(buf, len, "void");
+ return snprintf(buf, len, "void");
case irms_internal_boolean:
switch (mode_info->mode_output) {
int i, j, pos = 0;
int n = get_mode_size_bits(tv->mode);
int bytes = (n + 7) / 8;
- char *res = malloc((n + 1) * sizeof(char));
+ char *res = xmalloc((n + 1) * sizeof(char));
unsigned char byte;
for(i = 0; i < bytes; i++) {
* Identifying tarvals values for algebraic simplifications.
*
* Returns:
- * - TV_CLASSIFY_NULL for additive neutral,
+ * - TV_CLASSIFY_NULL for additive neutral or the NULL tarval for reference modes,
* - TV_CLASSIFY_ONE for multiplicative neutral,
* - TV_CLASSIFY_ALL_ONE for bitwise-and neutral
* - TV_CLASSIFY_OTHER else
return TV_CLASSIFY_OTHER;
}
-/**
+/*
+ * Returns non-zero if a given (integer) tarval has only one single bit
+ * set.
+ */
+int is_single_bit_tarval(tarval *tv) {
+ int i, l;
+ int bits;
+
+ if (!tv || tv == tarval_bad) return 0;
+ if (! mode_is_int(tv->mode)) return 0;
+
+ l = get_mode_size_bytes(tv->mode);
+ for (bits = 0, i = l - 1; i >= 0; --i) {
+ unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
+
+ /* check for more than one bit in these */
+ if (v) {
+ if (v & (v-1))
+ return 0;
+ if (++bits > 1)
+ return 0;
+ }
+ }
+ return bits;
+}
+
+/*
* Sets the overflow mode for integer operations.
*/
void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
")",
};
-
/*
* Initialization of the tarval module: called before init_mode()
*/
-void init_tarval_1(void)
+void init_tarval_1(long null_value)
{
ANNOUNCE();
+ _null_value = null_value;
+
/* initialize the sets holding the tarvals with a comparison function and
* an initial size, which is the expected number of constants */
tarvals = new_set(memcmp, N_CONSTANTS);
{
ANNOUNCE();
- tarval_bad->mode = mode_BAD;
- tarval_undefined->mode = mode_ANY;
- tarval_b_true->mode = mode_b;
- tarval_b_false->mode = mode_b;
- tarval_P_void->mode = mode_P;
+ tarval_bad->kind = k_tarval;
+ tarval_bad->mode = mode_BAD;
+ tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
+
+ tarval_undefined->kind = k_tarval;
+ tarval_undefined->mode = mode_ANY;
+ tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
+
+ tarval_b_true->kind = k_tarval;
+ tarval_b_true->mode = mode_b;
+ tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
+
+ tarval_b_false->kind = k_tarval;
+ tarval_b_false->mode = mode_b;
+ tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
/*
* assign output modes that are compatible with the
projects / libfirm / blobdiff