-/* TV --- Target Values, aka Constant Table.
- Copyright (C) 1995, 1996 Christian von Roques */
-
-/* $Id$ */
+/*
+ * Project: libFIRM
+ * File name: ir/tv/tv.c
+ * Purpose: Representation of and static computations on target machine
+ * values.
+ * Author: Mathias Heil
+ * Modified by:
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 2003 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
-/****i* tv/implementation
- *
- * AUTHORS
- * Christian von Roques
- * Matthias Heil
- *
- * NOTES
- * Internal storage for tarvals, 1st draft:
- * Integers as well as pointers are stored in a hex formatted string holding
- * 16 characters. Booleans are not stored as there are only two of them.
+/*
+ * Values are stored in a format depending upon chosen arithmetic
+ * module. Default uses strcalc and fltcalc.
*
- * Floats are just reinterpreted as byte strings, because I am not sure if
- * there is loss if I convert float to long double and back and furthermore
- * the implementation of a fully ieee compatible floating point emulation
- * is not sensible for now
- * With this information it is easy to decide the kind of stored value:
- * Integers have size 16, floats 4, doubles 8, long doubles 12.
- ******/
+ */
/* This implementation assumes:
- * both host and target have IEEE-754 floating-point arithmetic. */
+ * - target has IEEE-754 floating-point arithmetic. */
-/* !!! float and double divides MUST NOT SIGNAL !!! */
-/* @@@ query the floating-point expception status flags */
-
-/* @@@ Problem: All Values are stored twice, once as Univ_*s and a 2nd
- time in their real target mode. :-( */
-
-#define MAX_INT_LENGTH 8
-#define CHAR_BUFFER_SIZE ((MAX_INT_LENGTH) * 2)
#ifdef HAVE_CONFIG_H
-# include <config.h>
+# include "config.h"
#endif
+
#include <assert.h> /* assertions */
#include <stdlib.h> /* atoi() */
-#include <string.h> /* nice things for strings */
-#include <strings.h> /* nice things for strings */
+#ifdef HAVE_STRING_H
+# include <string.h> /* nice things for strings */
+#endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h> /* strings.h also includes bsd only function strcasecmp */
+#endif
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#endif
+#ifdef HAVE_MALLOC_H
+# include <malloc.h>
+#endif
-#include <stdlib.h>
#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.h" /* defines modes etc */
#include "irmode_t.h"
-#include "irnode.h" /* defines boolean return values */
-#include "host.h"
+#include "irnode.h" /* defines boolean return values (pnc_number)*/
#include "strcalc.h"
#include "fltcalc.h"
+#include "irtools.h"
+#include "firm_common.h"
+
+/** Size of hash tables. Should correspond to average number of distinct constant
+ target values */
+#define N_CONSTANTS 2048
+
+/* get the integer overflow mode */
+#define GET_OVERFLOW_MODE() int_overflow_mode
+
+/* unused, float to int doesn't work yet */
+enum float_to_int_mode {
+ TRUNCATE,
+ ROUND
+};
+
+#define GET_FLOAT_TO_INT_MODE() TRUNCATE
+
+#define SWITCH_NOINFINITY 0
+#define SWITCH_NODENORMALS 0
/****************************************************************************
* local definitions and macros
****************************************************************************/
static struct set *tarvals; /* container for tarval structs */
static struct set *values; /* container for values */
+static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
/****************************************************************************
* private functions
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 (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);
- else
+ } else {
tv.value = value;
-
+ }
/* if there is such a tarval, it is returned, else tv is copied
* into the set */
return (tarval *)INSERT_TARVAL(&tv);
}
/**
- * Returns non-zero if a tarval overflows.
- *
- * @todo Implementation did not work on all modes
+ * handle overflow
*/
-static int overflows(tarval *tv)
+static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
{
- switch (get_mode_sort(tv->mode))
+ switch (get_mode_sort(mode))
{
- case irms_character:
case irms_int_number:
- if (sc_comp(tv->value, get_mode_max(tv->mode)->value) == 1) return 1;
- if (sc_comp(tv->value, get_mode_min(tv->mode)->value) == -1) return 1;
+ 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());
+ 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);
+ return get_tarval(temp, length, mode);
+ }
+ case TV_OVERFLOW_BAD:
+ return tarval_bad;
+ default:
+ return get_tarval(value, length, mode);
+ }
+ }
+ if (sc_comp(value, get_mode_min(mode)->value) == -1) {
+ switch (GET_OVERFLOW_MODE()) {
+ case TV_OVERFLOW_SATURATE:
+ return get_mode_min(mode);
+ 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);
+ return get_tarval(temp, length, mode);
+ }
+ case TV_OVERFLOW_BAD:
+ return tarval_bad;
+ default:
+ return get_tarval(value, length, mode);
+ }
+ }
break;
case irms_float_number:
- /*
- * TODO: check NaNs
- */
- if (fc_comp(tv->value, get_mode_max(tv->mode)->value) == 1) return 1;
- if (fc_comp(tv->value, get_mode_min(tv->mode)->value) == -1) return 1;
- break;
+ if (SWITCH_NOINFINITY && fc_is_inf(value))
+ {
+ return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode);
+ }
+ if (SWITCH_NODENORMALS && fc_is_subnormal(value))
+ {
+ return get_mode_null(mode);
+ }
+ break;
default:
break;
}
-
- return 0;
+ return get_tarval(value, length, mode);
}
+
/*
* public variables declared in tv.h
*/
-tarval *tarval_bad;
-tarval *tarval_undefined;
-tarval *tarval_b_false;
-tarval *tarval_b_true;
-tarval *tarval_P_void;
+static tarval reserved_tv[5];
+
+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
break;
case irms_internal_boolean:
- /* match tTrRuUeE/fFaAlLsSeE */
+ /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
if (strcasecmp(str, "true")) return tarval_b_true;
else if (strcasecmp(str, "false")) return tarval_b_true;
else
- return atoi(str) ? tarval_b_true : tarval_b_false;
+ /* XXX This is C semantics */
+ return atoi(str) ? tarval_b_true : tarval_b_false;
case irms_float_number:
- fc_val_from_str(str, len);
+ switch(get_mode_size_bits(mode)) {
+ case 32:
+ fc_val_from_str(str, len, 8, 23, NULL);
+ break;
+ case 64:
+ fc_val_from_str(str, len, 11, 52, NULL);
+ break;
+ case 80:
+ fc_val_from_str(str, len, 15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_int_number:
case irms_character:
- sc_val_from_str(str, len);
+ sc_val_from_str(str, len, NULL, mode);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
case irms_reference:
return NULL;
}
-#if 0
-int tarval_is_str(tarval *tv)
-{
- ANNOUNCE();
- assert(tv);
-
- return ((get_mode_sort(tv->mode) == reference) && (tv->value != NULL) && (tv->length > 0));
-}
-char *tarval_to_str(tarval *tv)
-{
- ANNOUNCE();
- assert(tarval_is_str(tv));
- return (char *)tv->value;
-}
-#endif
-
/*
* helper function, create a tarval from long
*/
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))
{
case irms_internal_boolean:
- /* XXX C-Semantics ! */
+ /* XXX C semantics ! */
return l ? tarval_b_true : tarval_b_false ;
case irms_int_number:
case irms_character:
- sc_val_from_long(l);
+ sc_val_from_long(l, NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
case irms_float_number:
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();
- return ((get_mode_sort(tv->mode) == irms_int_number) || (get_mode_sort(tv->mode) == irms_character));
+ if (sort != irms_int_number && sort != irms_character) return 0;
+
+ if (get_mode_size_bits(tv->mode) > sizeof(long)<<3)
+ {
+ /* the value might be too big to fit in a long */
+ sc_max_from_bits(sizeof(long)<<3, 0, NULL);
+ if (sc_comp(sc_get_buffer(), tv->value) == -1)
+ {
+ /* really doesn't fit */
+ return 0;
+ }
+ }
+ return 1;
}
/* this might overflow the machine's long, so use only with small values */
-long tarval_to_long(tarval* tv)
+long get_tarval_long(tarval* tv)
{
ANNOUNCE();
- assert(tv && get_mode_sort(tv->mode) == irms_int_number);
+ assert(tarval_is_long(tv) && "tarval too big to fit in long");
- return sc_val_to_long(tv->value); /* might overflow */
+ return sc_val_to_long(tv->value);
}
tarval *new_tarval_from_double(long double d, ir_mode *mode)
ANNOUNCE();
assert(mode && (get_mode_sort(mode) == irms_float_number));
- fc_val_from_float(d);
+ switch (get_mode_size_bits(mode)) {
+ case 32:
+ fc_val_from_float(d, 8, 23, NULL);
+ break;
+ case 64:
+ fc_val_from_float(d, 11, 52, NULL);
+ break;
+ case 80:
+ fc_val_from_float(d, 15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
}
return (get_mode_sort(tv->mode) == irms_float_number);
}
-long double tarval_to_double(tarval *tv)
+long double get_tarval_double(tarval *tv)
{
ANNOUNCE();
assert(tarval_is_double(tv));
return fc_val_to_float(tv->value);
}
-/* The tarval represents the address of the entity. As the address must
- be constant the entity must have as owner the global type. */
-tarval *new_tarval_from_entity (entity *ent, ir_mode *mode)
-{
- ANNOUNCE();
- assert(ent);
- assert(mode && (get_mode_sort(mode) == irms_reference));
-
- return get_tarval((void *)ent, 0, mode);
-}
-int tarval_is_entity(tarval *tv)
-{
- ANNOUNCE();
- assert(tv);
- /* tv->value == NULL means dereferencing a null pointer */
- return ((get_mode_sort(tv->mode) == irms_reference) && (tv->value != NULL) && (tv->length == 0)
- && (tv != tarval_P_void));
-}
-
-entity *tarval_to_entity(tarval *tv)
-{
- ANNOUNCE();
- assert(tv);
-
- if (tarval_is_entity(tv))
- return (entity *)tv->value;
- else {
- assert(0 && "tarval did not represent an entity");
- return NULL;
- }
-}
-
-void free_tarval_entity(entity *ent) {
- /* There can be a tarval referencing this entity. Even if the
- tarval is not used by the code any more, it can still reference
- the entity as tarvals live indepently of the entity referenced.
- Further the tarval is hashed into a set. If a hash function
- evaluation happens to collide with this tarval, we will vrfy that
- it contains a proper entity and we will crash if the entity is
- freed.
-
- Unluckily, tarvals can neither be changed nor deleted, and to find
- one, all existing reference modes have to be tried -> a facility
- to retrieve all modes of a kind is needed. */
- ANNOUNCE();
-}
/*
* Access routines for tarval fields ========================================
*/
-ir_mode *get_tarval_mode (tarval *tv) /* get the mode of the tarval */
-{
- ANNOUNCE();
- assert(tv);
- return tv->mode;
+
+/* get the mode of the tarval */
+ir_mode *(get_tarval_mode)(const tarval *tv) {
+ return _get_tarval_mode(tv);
}
/*
* 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_undefined)(void) {
+ return _get_tarval_undefined();
}
-tarval *get_tarval_b_false(void)
-{
- ANNOUNCE();
- return tarval_b_false;
+
+tarval *(get_tarval_b_false)(void) {
+ return _get_tarval_b_false();
}
-tarval *get_tarval_b_true(void)
-{
- ANNOUNCE();
- return tarval_b_true;
+
+tarval *(get_tarval_b_true)(void) {
+ return _get_tarval_b_true();
}
-tarval *get_tarval_P_void(void)
-{
- ANNOUNCE();
- return tarval_P_void;
+
+tarval *(get_tarval_P_void)(void) {
+ return _get_tarval_P_void();
}
tarval *get_tarval_max(ir_mode *mode)
ANNOUNCE();
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_reference:
return tarval_b_true;
case irms_float_number:
- fc_get_max(get_mode_size_bits(mode));
+ switch(get_mode_size_bits(mode))
+ {
+ case 32:
+ fc_get_max(8, 23, NULL);
+ break;
+ case 64:
+ fc_get_max(11, 52, NULL);
+ break;
+ case 80:
+ fc_get_max(15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_int_number:
case irms_character:
- sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode));
+ 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;
ANNOUNCE();
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_reference:
return tarval_b_false;
case irms_float_number:
- fc_get_min(get_mode_size_bits(mode));
+ switch(get_mode_size_bits(mode))
+ {
+ case 32:
+ fc_get_min(8, 23, NULL);
+ break;
+ case 64:
+ fc_get_min(11, 52, NULL);
+ break;
+ case 80:
+ fc_get_min(15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_int_number:
case irms_character:
- sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode));
+ 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;
ANNOUNCE();
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:
ANNOUNCE();
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:
return tarval_bad;
}
+tarval *get_tarval_minus_one(ir_mode *mode)
+{
+ ANNOUNCE();
+ 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:
+ case irms_reference:
+ assert(0);
+ break;
+
+ case irms_float_number:
+ return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
+
+ case irms_int_number:
+ case irms_character:
+ return mode_is_signed(mode) ? new_tarval_from_long(-1l, mode) : tarval_bad;
+ }
+ return tarval_bad;
+}
+
tarval *get_tarval_nan(ir_mode *mode)
{
ANNOUNCE();
assert(mode);
+ if (get_mode_n_vector_elems(mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+ if (get_mode_sort(mode) == irms_float_number) {
+ switch(get_mode_size_bits(mode))
+ {
+ case 32:
+ fc_get_qnan(8, 23, NULL);
+ break;
+ case 64:
+ fc_get_qnan(11, 52, NULL);
+ break;
+ case 80:
+ fc_get_qnan(15, 64, NULL);
+ break;
+ }
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
+ }
+ else {
+ assert(0 && "tarval is not floating point");
+ return tarval_bad;
+ }
+}
+
+tarval *get_tarval_plus_inf(ir_mode *mode)
+{
+ ANNOUNCE();
+ assert(mode);
+
+ if (get_mode_n_vector_elems(mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
if (get_mode_sort(mode) == irms_float_number) {
- fc_get_nan();
+ switch(get_mode_size_bits(mode))
+ {
+ case 32:
+ fc_get_plusinf(8, 23, NULL);
+ break;
+ case 64:
+ fc_get_plusinf(11, 52, NULL);
+ break;
+ case 80:
+ fc_get_plusinf(15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
}
else {
}
}
-tarval *get_tarval_inf(ir_mode *mode)
+tarval *get_tarval_minus_inf(ir_mode *mode)
{
ANNOUNCE();
assert(mode);
+ if (get_mode_n_vector_elems(mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
if (get_mode_sort(mode) == irms_float_number) {
- fc_get_inf();
+ switch(get_mode_size_bits(mode))
+ {
+ case 32:
+ fc_get_minusinf(8, 23, NULL);
+ break;
+ case 64:
+ fc_get_minusinf(11, 52, NULL);
+ break;
+ case 80:
+ fc_get_minusinf(15, 64, NULL);
+ break;
+ }
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
}
else {
ANNOUNCE();
assert(a);
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ assert(0 && "tarval_is_negative is not allowed for vector modes");
+ return 0;
+ }
+
switch (get_mode_sort(a->mode))
{
case irms_int_number:
if (!mode_is_signed(a->mode)) return 0;
else
- return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
+ return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
case irms_float_number:
return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
return a == get_tarval_null(m);
}
+/*
+ * test if one, 1 means 'yes'
+ */
+int tarval_is_one(tarval *a)
+{
+ ir_mode *m = get_tarval_mode(a);
+
+ return a == get_tarval_one(m);
+}
+
/*
* comparison
*/
-pnc_number tarval_cmp(tarval *a, tarval *b)
+pn_Cmp tarval_cmp(tarval *a, tarval *b)
{
ANNOUNCE();
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 False;
- if (a == b) return Eq;
- if (get_tarval_mode(a) != get_tarval_mode(b)) return Uo;
+ 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 */
+ assert(0 && "cmp not implemented for vector modes");
+ }
/* Here the two tarvals are unequal and of the same mode */
switch (get_mode_sort(a->mode))
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- return False;
+ case irms_reference:
+ if (a == b)
+ return pn_Cmp_Eq;
+ return pn_Cmp_False;
case irms_float_number:
- return (fc_comp(a->value, b->value)==1)?(Gt):(Lt);
-
+ /*
+ * 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: 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:
- return (sc_comp(a->value, b->value)==1)?(Gt):(Lt);
+ 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:
- return (a == tarval_b_true)?(Gt):(Lt);
-
- case irms_reference:
- return Uo;
+ if (a == b)
+ return pn_Cmp_Eq;
+ return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
}
- return False;
+ return pn_Cmp_False;
}
/*
*/
tarval *tarval_convert_to(tarval *src, ir_mode *m)
{
- tarval tv;
+ char *buffer;
ANNOUNCE();
assert(src);
if (src->mode == m) return src;
+ if (get_mode_n_vector_elems(src->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
switch (get_mode_sort(src->mode))
{
case irms_control_flow:
case irms_auxiliary:
break;
+ /* cast float to something */
case irms_float_number:
switch (get_mode_sort(m)) {
- case irms_float_number:
- tv.mode = m;
- tv.length = src->length;
- tv.value = src->value;
- if (overflows(&tv)) {
- return tarval_bad;
- }
+ case irms_float_number:
+ switch (get_mode_size_bits(m))
+ {
+ case 32:
+ fc_cast(src->value, 8, 23, NULL);
+ break;
+ case 64:
+ fc_cast(src->value, 11, 52, NULL);
+ break;
+ case 80:
+ fc_cast(src->value, 15, 64, NULL);
+ break;
+ default:
+ break;
+ }
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
- return INSERT_TARVAL(&tv);
+ case irms_int_number:
+ switch (GET_FLOAT_TO_INT_MODE())
+ {
+ case TRUNCATE:
+ fc_int(src->value, NULL);
+ break;
+ case ROUND:
+ 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;
- default:
- break;
+ default:
+ /* the rest can't be converted */
+ return tarval_bad;
}
break;
+ /* cast int to something */
case irms_int_number:
switch (get_mode_sort(m)) {
case irms_int_number:
case irms_character:
- tv.mode = m;
- tv.length = src->length;
- tv.value = src->value;
- if (overflows(&tv))
- return tarval_bad;
-
- return INSERT_TARVAL(&tv);
+ return get_tarval_overflow(src->value, src->length, m);
case irms_internal_boolean:
/* XXX C semantics */
if (src == get_mode_null(src->mode)) return tarval_b_false;
else return tarval_b_true;
+ case irms_float_number:
+ /* XXX floating point unit does not understand internal integer
+ * representation, convert to string first, then create float from
+ * string */
+ buffer = alloca(100);
+ /* decimal string representation because hexadecimal output is
+ * interpreted unsigned by fc_val_from_str, so this is a HACK */
+ snprintf(buffer, 100, "%s",
+ sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC));
+ switch (get_mode_size_bits(m))
+ {
+ case 32:
+ fc_val_from_str(buffer, 0, 8, 23, NULL);
+ break;
+ case 64:
+ fc_val_from_str(buffer, 0, 11, 52, NULL);
+ break;
+ case 80:
+ fc_val_from_str(buffer, 0, 15, 64, NULL);
+ break;
+ }
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
+#if 0
+ case irms_reference:
+ /* allow 0 to be casted */
+ if (src == get_mode_null(src->mode))
+ return get_mode_null(m);
+ break;
+#endif
default:
break;
}
}
/*
- * negation
+ * bitwise negation
+ */
+tarval *tarval_not(tarval *a)
+{
+ char *buffer;
+
+ ANNOUNCE();
+ assert(a);
+
+ /* works for vector mode without changes */
+
+ switch (get_mode_sort(a->mode))
+ {
+ case irms_int_number:
+ buffer = alloca(sc_get_buffer_length());
+ 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;
+ }
+}
+
+/*
+ * arithmetic negation
*/
tarval *tarval_neg(tarval *a)
{
+ char *buffer;
+
ANNOUNCE();
assert(a);
assert(mode_is_num(a->mode)); /* negation only for numerical values */
- assert(mode_is_signed(a->mode)); /* negation is difficult without negative numbers, isn't it */
+
+ /* note: negation is allowed even for unsigned modes. */
+
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
switch (get_mode_sort(a->mode))
{
case irms_int_number:
- sc_neg(a->value);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ buffer = alloca(sc_get_buffer_length());
+ sc_neg(a->value, buffer);
+ return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- fc_neg(a->value);
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ fc_neg(a->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
default:
return tarval_bad;
*/
tarval *tarval_add(tarval *a, tarval *b)
{
+ char *buffer;
+
ANNOUNCE();
assert(a);
assert(b);
- assert((a->mode == b->mode) || (get_mode_sort(a->mode) == irms_character && mode_is_int(b->mode)));
+ assert(a->mode == b->mode);
+
+ if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
switch (get_mode_sort(a->mode))
{
case irms_character:
case irms_int_number:
/* modes of a,b are equal, so result has mode of a as this might be the character */
- sc_add(a->value, b->value);
- /* FIXME: Check for overflow */
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ buffer = alloca(sc_get_buffer_length());
+ sc_add(a->value, b->value, buffer);
+ return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- /* FIXME: Overflow/Underflow/transition to inf when mode < 80bit */
- fc_add(a->value, b->value);
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ fc_add(a->value, b->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
default:
return tarval_bad;
*/
tarval *tarval_sub(tarval *a, tarval *b)
{
+ char *buffer;
+
ANNOUNCE();
assert(a);
assert(b);
- assert((a->mode == b->mode) || (get_mode_sort(a->mode) == irms_character && mode_is_int(b->mode)));
+ assert(a->mode == b->mode);
+ if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
switch (get_mode_sort(a->mode))
{
case irms_character:
case irms_int_number:
/* modes of a,b are equal, so result has mode of a as this might be the character */
- sc_sub(a->value, b->value);
- /* FIXME: check for overflow */
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ buffer = alloca(sc_get_buffer_length());
+ sc_sub(a->value, b->value, buffer);
+ return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- /* FIXME: Overflow/Underflow/transition to inf when mode < 80bit */
- fc_add(a->value, b->value);
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ fc_sub(a->value, b->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
default:
return tarval_bad;
*/
tarval *tarval_mul(tarval *a, tarval *b)
{
+ char *buffer;
+
ANNOUNCE();
assert(a);
assert(b);
- assert((a->mode == b->mode) && mode_is_num(a->mode));
+ assert(a->mode == b->mode);
+
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
switch (get_mode_sort(a->mode))
{
case irms_int_number:
/* modes of a,b are equal */
- sc_mul(a->value, b->value);
- /* FIXME: check for overflow */
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ buffer = alloca(sc_get_buffer_length());
+ sc_mul(a->value, b->value, buffer);
+ return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- /* FIXME: Overflow/Underflow/transition to inf when mode < 80bit */
- fc_add(a->value, b->value);
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ fc_mul(a->value, b->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
default:
return tarval_bad;
assert(b);
assert((a->mode == b->mode) && mode_is_float(a->mode));
- /* FIXME: Overflow/Underflow/transition to inf when mode < 80bit */
- fc_div(a->value, b->value);
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+ fc_div(a->value, b->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
}
/*
* integer division
+ * overflow is impossible, but look out for division by zero
*/
tarval *tarval_div(tarval *a, tarval *b)
{
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_div(a->value, b->value);
+ sc_div(a->value, b->value, NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
/*
* remainder
+ * overflow is impossible, but look out for division by zero
*/
tarval *tarval_mod(tarval *a, tarval *b)
{
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_mod(a->value, b->value);
+ sc_mod(a->value, b->value, NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
*/
tarval *tarval_abs(tarval *a)
{
+ char *buffer;
+
ANNOUNCE();
assert(a);
assert(mode_is_num(a->mode));
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
switch (get_mode_sort(a->mode))
{
case irms_int_number:
if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1)
{
- sc_neg(a->value);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ buffer = alloca(sc_get_buffer_length());
+ sc_neg(a->value, buffer);
+ return get_tarval_overflow(buffer, a->length, a->mode);
}
return a;
case irms_float_number:
- break;
+ if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1)
+ {
+ fc_neg(a->value, NULL);
+ return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ }
+ return a;
default:
return tarval_bad;
assert(b);
assert(a->mode == b->mode);
- /* GL: needed for easy optimization. */
- if (a->mode == mode_b) return (a == tarval_b_false) ? a : b;
+ /* works even for vector modes */
- assert(mode_is_int(a->mode));
+ switch(get_mode_sort(a->mode))
+ {
+ case irms_internal_boolean:
+ return (a == tarval_b_false) ? a : b;
- sc_and(a->value, b->value);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ case irms_int_number:
+ sc_and(a->value, b->value, NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+
+ default:
+ assert(0 && "operation not defined on mode");
+ return tarval_bad;
+ }
}
/*
assert(b);
assert(a->mode == b->mode);
- /* GL: needed for easy optimization. */
- if (a->mode == mode_b) return (a == tarval_b_true) ? a : b;
+ /* works even for vector modes */
+ switch (get_mode_sort(a->mode))
+ {
+ case irms_internal_boolean:
+ return (a == tarval_b_true) ? a : b;
- assert(mode_is_int(a->mode));
+ case irms_int_number:
+ sc_or(a->value, b->value, NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
- sc_or(a->value, b->value);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ default:
+ assert(0 && "operation not defined on mode");
+ return tarval_bad;;
+ }
}
/*
ANNOUNCE();
assert(a);
assert(b);
- assert((a->mode == b->mode) && mode_is_int(a->mode));
+ assert((a->mode == b->mode));
- sc_or(a->value, b->value);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+ /* works even for vector modes */
+
+ switch (get_mode_sort(a->mode))
+ {
+ case irms_internal_boolean:
+ return (a == b)? tarval_b_false : tarval_b_true;
+
+ case irms_int_number:
+ sc_xor(a->value, b->value, NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+
+ default:
+ assert(0 && "operation not defined on mode");
+ return tarval_bad;;
+ }
}
/*
*/
tarval *tarval_shl(tarval *a, tarval *b)
{
+ char *temp_val = NULL;
ANNOUNCE();
assert(a);
assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
- sc_shl(a->value, b->value, get_mode_size_bits(a->mode), mode_is_signed(a->mode));
+ 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;
+ }
+
+ if (get_mode_modulo_shift(a->mode) != 0)
+ {
+ temp_val = alloca(sc_get_buffer_length());
+
+ sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
+ sc_mod(b->value, temp_val, temp_val);
+ }
+ else
+ temp_val = (char*)b->value;
+
+ sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
*/
tarval *tarval_shr(tarval *a, tarval *b)
{
+ char *temp_val = NULL;
ANNOUNCE();
assert(a);
assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
- sc_shr(a->value, b->value, get_mode_size_bits(a->mode), mode_is_signed(a->mode));
+ 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;
+ }
+
+ if (get_mode_modulo_shift(a->mode) != 0)
+ {
+ temp_val = alloca(sc_get_buffer_length());
+
+ sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
+ sc_mod(b->value, temp_val, temp_val);
+ }
+ else
+ temp_val = (char*)b->value;
+
+ sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
*/
tarval *tarval_shrs(tarval *a, tarval *b)
{
+ char *temp_val = NULL;
ANNOUNCE();
assert(a);
assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
- sc_shrs(a->value, b->value, get_mode_size_bits(a->mode), mode_is_signed(a->mode));
+ 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;
+ }
+
+ if (get_mode_modulo_shift(a->mode) != 0)
+ {
+ temp_val = alloca(sc_get_buffer_length());
+
+ sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
+ sc_mod(b->value, temp_val, temp_val);
+ }
+ else
+ temp_val = (char*)b->value;
+
+ sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
*/
tarval *tarval_rot(tarval *a, tarval *b)
{
+ char *temp_val = NULL;
ANNOUNCE();
assert(a);
assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
- sc_rot(a->value, b->value, get_mode_size_bits(a->mode), mode_is_signed(a->mode));
+ 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;
+ }
+
+ if (get_mode_modulo_shift(a->mode) != 0)
+ {
+ temp_val = alloca(sc_get_buffer_length());
+
+ sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
+ sc_mod(b->value, temp_val, temp_val);
+ }
+ else
+ temp_val = (char*)b->value;
+
+ sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
+/*
+ * carry flag of the last operation
+ */
+int tarval_carry(void)
+{
+ return sc_had_carry();
+}
/*
* Output of tarvals
case TVO_DECIMAL:
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC);
- break;
+ break;
case TVO_OCTAL:
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT);
- break;
+ break;
case TVO_HEX:
case TVO_NATIVE:
default:
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX);
- break;
+ break;
}
return snprintf(buf, len, "%s%s%s", prefix, str, suffix);
case irms_float_number:
- return snprintf(buf, len, "%s%s%s", prefix, fc_print_dec(tv->value, tv_buf, sizeof(tv_buf)), suffix);
+ switch (mode_info->mode_output) {
+ case TVO_HEX:
+ return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_PACKED), suffix);
+
+ case TVO_HEXFLOAT:
+ return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_HEX), suffix);
+
+ case TVO_FLOAT:
+ case TVO_NATIVE:
+ default:
+ return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_DEC), suffix);
+ }
+ break;
case irms_reference:
- if (tv->value != NULL)
- if (tarval_is_entity(tv)) {
- if (get_entity_peculiarity((entity *)tv->value) == existent)
- return snprintf(buf, len, "%s%s%s", prefix, get_entity_ld_name((entity *)tv->value), suffix);
- else {
- if (mode_info->mode_output == TVO_NATIVE)
- return snprintf(buf, len, "NULL");
- else
- return snprintf(buf, len, "0");
- }
- }
- else {
- if (size > tv->length) {
- memcpy(buf, tv->value, tv->length);
- buf[tv->length] = '\0';
- }
- else {
- /* truncated */
- memcpy(buf, tv->value, size-1);
- buf[size-1] = '\0';
- }
- return tv->length;
- }
+ 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';
+ }
+ return tv->length;
+ }
else
- return snprintf(buf, len, "void");
+ return snprintf(buf, len, "void");
case irms_internal_boolean:
switch (mode_info->mode_output) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- return snprintf(buf, len, "<BAD>");
+ return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
}
return 0;
}
-char *tarval_bitpattern(tarval *tv)
+char *get_tarval_bitpattern(tarval *tv)
{
- return NULL;
+ 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));
+ unsigned char byte;
+
+ for(i = 0; i < bytes; i++) {
+ byte = get_tarval_sub_bits(tv, i);
+ for(j = 1; j < 256; j <<= 1)
+ if(pos < n)
+ res[pos++] = j & byte ? '1' : '0';
+ }
+
+ res[n] = '\0';
+
+ return res;
}
/*
* access to the bitpattern
*/
-unsigned char tarval_sub_bits(tarval *tv, unsigned byte_ofs)
+unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs)
{
switch (get_mode_sort(tv->mode)) {
case irms_int_number:
*
* Returns zero on success.
*/
-int tarval_set_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo)
+int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo)
{
assert(mode);
return 0;
}
-/* Identifying some tarvals ??? */
-/* Implemented in old tv.c as such:
- * return 0 for additive neutral,
- * 1 for multiplicative neutral,
- * -1 for bitwise-and neutral
- * 2 else
+/*
+ * Returns the output options of one mode.
*
- * Implemented for completeness */
-long tarval_classify(tarval *tv)
+ * This functions returns the mode info of a given mode.
+ */
+const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode)
{
- ANNOUNCE();
- if (!tv || tv == tarval_bad) return 2;
-
- if (tv == get_mode_null(tv->mode)) return 0;
- else if (tv == get_mode_one(tv->mode)) return 1;
- else if ((get_mode_sort(tv->mode) == irms_int_number)
- && (tv == new_tarval_from_long(-1, tv->mode))) return -1;
+ assert(mode);
- return 2;
+ return mode->tv_priv;
}
/*
- * Initialization of the tarval module: called before init_mode()
+ * Identifying tarvals values for algebraic simplifications.
+ *
+ * Returns:
+ * - TV_CLASSIFY_NULL for additive neutral,
+ * - TV_CLASSIFY_ONE for multiplicative neutral,
+ * - TV_CLASSIFY_ALL_ONE for bitwise-and neutral
+ * - TV_CLASSIFY_OTHER else
*/
-void init_tarval_1(void)
+tarval_classification_t classify_tarval(tarval *tv)
{
ANNOUNCE();
- /* 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, TUNE_NCONSTANTS);
- values = new_set(memcmp, TUNE_NCONSTANTS);
- /* init with default precision */
- init_strcalc(0);
- /* init_fltcalc(0); not yet*/
+ 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;
+}
+
+/**
+ * Sets the overflow mode for integer operations.
+ */
+void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
+ int_overflow_mode = ov_mode;
+}
+
+/**
+ * Get the overflow mode for integer operations.
+ */
+tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
+ return int_overflow_mode;
}
/**
};
+/*
+ * Initialization of the tarval module: called before init_mode()
+ */
+void init_tarval_1(void)
+{
+ ANNOUNCE();
+ /* 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);
+ values = new_set(memcmp, N_CONSTANTS);
+ /* init strcalc with precision of 68 to support floating point values with 64
+ * bit mantissa (needs extra bits for rounding and overflow) */
+ init_strcalc(68);
+ init_fltcalc(0);
+}
+
/*
* Initialization of the tarval module: called after init_mode()
*/
{
ANNOUNCE();
- tarval_bad = (tarval*)malloc(sizeof(tarval));
- tarval_bad->mode = mode_BAD;
+ tarval_bad->kind = k_tarval;
+ tarval_bad->mode = mode_BAD;
- tarval_undefined = (tarval*)malloc(sizeof(tarval));
+ tarval_undefined->kind = k_tarval;
tarval_undefined->mode = mode_ANY;
- tarval_b_true = (tarval*)malloc(sizeof(tarval));
- tarval_b_true->mode = mode_b;
+ tarval_b_true->kind = k_tarval;
+ tarval_b_true->mode = mode_b;
- tarval_b_false = (tarval*)malloc(sizeof(tarval));
- tarval_b_false->mode = mode_b;
+ tarval_b_false->kind = k_tarval;
+ tarval_b_false->mode = mode_b;
- tarval_P_void = (tarval*)malloc(sizeof(tarval));
- tarval_P_void->mode = mode_P;
+ tarval_P_void->kind = k_tarval;
+ tarval_P_void->mode = mode_P;
/*
* assign output modes that are compatible with the
* old implementation: Hex output
*/
- tarval_set_mode_output_option(mode_U, &hex_output);
- tarval_set_mode_output_option(mode_C, &hex_output);
- tarval_set_mode_output_option(mode_Bs, &hex_output);
- tarval_set_mode_output_option(mode_Bu, &hex_output);
- tarval_set_mode_output_option(mode_Hs, &hex_output);
- tarval_set_mode_output_option(mode_Hu, &hex_output);
- tarval_set_mode_output_option(mode_Hs, &hex_output);
- tarval_set_mode_output_option(mode_Hu, &hex_output);
- tarval_set_mode_output_option(mode_Is, &hex_output);
- tarval_set_mode_output_option(mode_Iu, &hex_output);
- tarval_set_mode_output_option(mode_Ls, &hex_output);
- tarval_set_mode_output_option(mode_Lu, &hex_output);
- tarval_set_mode_output_option(mode_P, &reference_output);
+ set_tarval_mode_output_option(mode_U, &hex_output);
+ set_tarval_mode_output_option(mode_C, &hex_output);
+ set_tarval_mode_output_option(mode_Bs, &hex_output);
+ set_tarval_mode_output_option(mode_Bu, &hex_output);
+ set_tarval_mode_output_option(mode_Hs, &hex_output);
+ set_tarval_mode_output_option(mode_Hu, &hex_output);
+ set_tarval_mode_output_option(mode_Is, &hex_output);
+ set_tarval_mode_output_option(mode_Iu, &hex_output);
+ set_tarval_mode_output_option(mode_Ls, &hex_output);
+ set_tarval_mode_output_option(mode_Lu, &hex_output);
+ set_tarval_mode_output_option(mode_P, &reference_output);
+}
+
+/* free all memory occupied by tarval. */
+void finish_tarval(void) {
+ finish_strcalc ();
+ finish_fltcalc ();
+ del_set(tarvals); tarvals = NULL;
+ del_set(values); values = NULL;
}
/****************************************************************************
projects / libfirm / blobdiff