if (length > 0) {
/* if there already is such a value, it is returned, else value
* is copied into the set */
- tv.value = INSERT_VALUE(value, length);
+ char *temp = alloca(length);
+ memcpy(temp, value, length);
+ if (get_mode_arithmetic(mode) == irma_twos_complement) {
+ sign_extend(temp, mode);
+ }
+ tv.value = INSERT_VALUE(temp, length);
} else {
tv.value = value;
}
*/
static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
{
+ char *temp;
+
switch (get_mode_sort(mode)) {
+ case irms_reference:
+ /* addresses always wrap around */
+ temp = alloca(sc_get_buffer_length());
+ sc_val_from_ulong(-1, temp);
+ sc_and(temp, value, temp);
+ /* the sc_ module expects that all bits are set ... */
+ sign_extend(temp, mode);
+ return get_tarval(temp, length, mode);
+
case irms_int_number:
if (sc_comp(value, get_mode_max(mode)->value) == 1) {
switch (GET_OVERFLOW_MODE()) {
case TV_OVERFLOW_SATURATE:
return get_mode_max(mode);
case TV_OVERFLOW_WRAP:
- {
- char *temp = alloca(sc_get_buffer_length());
- sc_val_from_ulong(-1, temp);
- sc_and(temp, value, temp);
- /* the sc_ module expects that all bits are set ... */
- sign_extend(temp, mode);
- return get_tarval(temp, length, mode);
- }
+ temp = alloca(sc_get_buffer_length());
+ sc_val_from_ulong(-1, temp);
+ sc_and(temp, value, temp);
+ /* the sc_ module expects that all bits are set ... */
+ sign_extend(temp, mode);
+ return get_tarval(temp, length, mode);
case TV_OVERFLOW_BAD:
return tarval_bad;
default:
tarval *new_tarval_from_long(long l, ir_mode *mode) {
assert(mode);
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_internal_boolean:
/* XXX C semantics ! */
return l ? tarval_b_true : tarval_b_false ;
}
switch(get_mode_sort(mode)) {
- case irms_reference:
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- case irms_int_number:
- sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
+ case irms_reference:
+ case irms_int_number:
+ sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
}
return tarval_bad;
}
}
switch(get_mode_sort(mode)) {
- case irms_reference:
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- case irms_int_number:
- sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
+ case irms_reference:
+ case irms_int_number:
+ sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
}
return tarval_bad;
}
/** The bit pattern for the pointer NULL */
-static long _null_value;
+static long _null_value = 0;
tarval *get_tarval_null(ir_mode *mode) {
assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
+ assert(0);
return tarval_bad;
}
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- case irms_internal_boolean:
- case irms_reference:
assert(0);
break;
+ case irms_internal_boolean:
+ return tarval_b_true;
+
case irms_float_number:
return new_tarval_from_double(1.0, mode);
+ case irms_reference:
case irms_int_number:
return new_tarval_from_long(1l, mode);
- break;
}
return tarval_bad;
}
-tarval *get_tarval_minus_one(ir_mode *mode) {
+tarval *get_tarval_all_one(ir_mode *mode) {
assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
+ assert(0);
return tarval_bad;
}
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
+ assert(0);
+ return tarval_bad;
+
+ case irms_int_number:
case irms_internal_boolean:
case irms_reference:
+ return tarval_not(get_mode_null(mode));
+
+
+ case irms_float_number:
+ return new_tarval_from_double(1.0, mode);
+ }
+ return tarval_bad;
+}
+
+tarval *get_tarval_minus_one(ir_mode *mode) {
+ assert(mode);
+
+ if (get_mode_n_vector_elems(mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+ switch(get_mode_sort(mode)) {
+ case irms_control_flow:
+ case irms_memory:
+ case irms_auxiliary:
+ case irms_internal_boolean:
assert(0);
break;
+ case irms_reference:
+ return tarval_bad;
+
case irms_float_number:
return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
case irms_int_number:
- return mode_is_signed(mode) ? new_tarval_from_long(-1l, mode) : tarval_bad;
+ return new_tarval_from_long(-1l, mode);
}
return tarval_bad;
}
* test if null, 1 means 'yes'
*/
int tarval_is_null(tarval *a) {
- ir_mode *m = get_tarval_mode(a);
-
- return a == get_tarval_null(m);
+ return
+ a != tarval_bad &&
+ a == get_tarval_null(get_tarval_mode(a));
}
/*
* test if one, 1 means 'yes'
*/
int tarval_is_one(tarval *a) {
- ir_mode *m = get_tarval_mode(a);
+ return
+ a != tarval_bad &&
+ a == get_tarval_one(get_tarval_mode(a));
+}
- return a == get_tarval_one(m);
+int tarval_is_all_one(tarval *tv) {
+ return
+ tv != tarval_bad &&
+ tv == get_mode_all_one(get_tarval_mode(tv));
}
/*
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- case irms_reference:
if (a == b)
return pn_Cmp_Eq;
return pn_Cmp_False;
case 2: return pn_Cmp_Uo;
default: return pn_Cmp_False;
}
+ case irms_reference:
case irms_int_number:
if (a == b)
return pn_Cmp_Eq;
/*
* convert to other mode
*/
-tarval *tarval_convert_to(tarval *src, ir_mode *m) {
+tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
char *buffer;
+ fp_value *res;
assert(src);
- assert(m);
+ assert(dst_mode);
- if (src->mode == m) return src;
+ if (src->mode == dst_mode) return src;
if (get_mode_n_vector_elems(src->mode) > 1) {
/* vector arithmetic not implemented yet */
/* cast float to something */
case irms_float_number:
- switch (get_mode_sort(m)) {
+ switch (get_mode_sort(dst_mode)) {
case irms_float_number:
- switch (get_mode_size_bits(m)) {
+ switch (get_mode_size_bits(dst_mode)) {
case 32:
fc_cast(src->value, 8, 23, NULL);
break;
default:
break;
}
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
case irms_int_number:
switch (GET_FLOAT_TO_INT_MODE()) {
case TRUNCATE:
- fc_int(src->value, NULL);
+ res = fc_int(src->value, NULL);
break;
case ROUND:
- fc_rnd(src->value, NULL);
+ res = fc_rnd(src->value, NULL);
break;
default:
assert(0);
break;
}
- /* FIXME: floating point unit can't produce a value in integer
- * representation
- * an intermediate representation is needed here first. */
- /* return get_tarval(); */
- return tarval_bad;
+ if (! fc_flt2int(res, sc_get_buffer(), dst_mode))
+ return tarval_bad;
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), dst_mode);
default:
/* the rest can't be converted */
/* cast int/characters to something */
case irms_int_number:
- switch (get_mode_sort(m)) {
+ switch (get_mode_sort(dst_mode)) {
+
+ case irms_reference:
case irms_int_number:
buffer = alloca(sc_get_buffer_length());
memcpy(buffer, src->value, sc_get_buffer_length());
- sign_extend(buffer, m);
- return get_tarval_overflow(buffer, src->length, m);
+ sign_extend(buffer, dst_mode);
+ return get_tarval_overflow(buffer, src->length, dst_mode);
case irms_internal_boolean:
/* XXX C semantics */
snprintf(buffer, 100, "%s",
sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
buffer[100 - 1] = '\0';
- switch (get_mode_size_bits(m)) {
+ switch (get_mode_size_bits(dst_mode)) {
case 32:
fc_val_from_str(buffer, 0, 8, 23, NULL);
break;
fc_val_from_str(buffer, 0, 15, 64, NULL);
break;
}
- 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;
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
default:
break;
break;
case irms_internal_boolean:
- switch (get_mode_sort(m)) {
- case irms_int_number:
- if (src == tarval_b_true) return get_mode_one(m);
- else return get_mode_null(m);
-
- default:
- break;
- }
+ /* beware: this is C semantic for the INTERNAL boolean mode */
+ if (get_mode_sort(dst_mode) == irms_int_number)
+ return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
break;
case irms_reference:
- switch(get_mode_sort(m)) {
- case irms_int_number:
+ if (get_mode_sort(dst_mode) == irms_int_number) {
buffer = alloca(sc_get_buffer_length());
memcpy(buffer, src->value, sc_get_buffer_length());
sign_extend(buffer, src->mode);
- return get_tarval_overflow(buffer, src->length, m);
- default:
- break;
+ return get_tarval_overflow(buffer, src->length, dst_mode);
}
-
break;
}
/* works for vector mode without changes */
switch (get_mode_sort(a->mode)) {
+ case irms_reference:
case irms_int_number:
buffer = alloca(sc_get_buffer_length());
sc_not(a->value, buffer);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
+/*
+ * integer division AND remainder
+ * overflow is impossible, but look out for division by zero
+ */
+tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
+ int len = sc_get_buffer_length();
+ char *div_res = alloca(len);
+ char *mod_res = alloca(len);
+
+ assert(a);
+ assert(b);
+ assert((a->mode == b->mode) && mode_is_int(a->mode));
+
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+
+ /* x/0 error */
+ if (b == get_mode_null(b->mode)) return tarval_bad;
+ /* modes of a,b are equal */
+ sc_divmod(a->value, b->value, div_res, mod_res);
+ *mod = get_tarval(mod_res, len, a->mode);
+ return get_tarval(div_res, len, a->mode);
+}
+
/*
* absolute value
*/
unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
switch (get_mode_arithmetic(tv->mode)) {
case irma_twos_complement:
- return sc_sub_bits(tv->value, tv->length, byte_ofs);
+ return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
case irma_ieee754:
return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
default:
return mode->tv_priv;
}
-/*
- * Identifying tarvals values for algebraic simplifications.
- *
- * Returns:
- * - 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
- */
-tarval_classification_t classify_tarval(tarval *tv) {
- if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER;
-
- if (tv == get_mode_null(tv->mode))
- return TV_CLASSIFY_NULL;
- else if (tv == get_mode_one(tv->mode))
- return TV_CLASSIFY_ONE;
- else if ((get_mode_sort(tv->mode) == irms_int_number)
- && (tv == new_tarval_from_long(-1, tv->mode)))
- return TV_CLASSIFY_ALL_ONE;
-
- return TV_CLASSIFY_OTHER;
-}
-
/*
* Returns non-zero if a given (integer) tarval has only one single bit
* set.
projects / libfirm / blobdiff