/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @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 "bitfiddle.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"
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 {
+typedef enum float_to_int_mode {
TRUNCATE,
ROUND
-};
+} float_to_int_mode;
-#define GET_FLOAT_TO_INT_MODE() TRUNCATE
+static float_to_int_mode current_float_to_int_mode = TRUNCATE;
#define SWITCH_NOINFINITY 0
#define SWITCH_NODENORMALS 0
#define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
-/****************************************************************************
- * private variables
- ****************************************************************************/
-static struct set *tarvals = NULL; /* container for tarval structs */
-static struct set *values = NULL; /* container for values */
+/** A set containing all existing tarvals. */
+static struct set *tarvals = NULL;
+/** 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;
/** if this is set non-zero, the constant folding for floating point is OFF */
static int no_float = 0;
+/** IEEE-754r half precision */
+static const ieee_descriptor_t half_desc = { 5, 10, 0, NORMAL };
+/** IEEE-754 single precision */
+static const ieee_descriptor_t single_desc = { 8, 23, 0, NORMAL };
+/** IEEE-754 double precision */
+static const ieee_descriptor_t double_desc = { 11, 52, 0, NORMAL };
+/** Intel x87 extended precision */
+static const ieee_descriptor_t extended_desc = { 15, 63, 1, NORMAL };
+
+/** IEEE-754r quad precision */
+static const ieee_descriptor_t quad_desc = { 15, 112, 0, NORMAL };
+
/****************************************************************************
* private functions
****************************************************************************/
{
/* print a memory image of the tarval and throw an assertion */
if (tv)
- printf("%s:%d: Invalid tarval:\n mode: %s\n value: [%p]\n", file, line, get_mode_name(tv->mode), tv->value);
+ panic("%s:%d: Invalid tarval: mode: %F\n value: [%p]", file, line, tv->mode, tv->value);
else
- printf("%s:%d: Invalid tarval (null)", file, line);
- assert(0);
+ 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);
if (!FIND_TARVAL(tv)) fail_verify(tv);
if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
-
- return;
}
#endif /* NDEBUG */
/** Hash a tarval. */
-static int hash_tv(tarval *tv) {
+static int hash_tv(tarval *tv)
+{
return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
}
/** Hash a value. Treat it as a byte array. */
-static int hash_val(const void *value, unsigned int length) {
+static int hash_val(const void *value, unsigned int length)
+{
unsigned int i;
unsigned int hash = 0;
return hash;
}
+static int cmp_tv(const void *p1, const void *p2, size_t n)
+{
+ const tarval *tv1 = p1;
+ const tarval *tv2 = p2;
+ (void) n;
+
+ assert(tv1->kind == k_tarval);
+ assert(tv2->kind == k_tarval);
+ if (tv1->mode < tv2->mode)
+ return -1;
+ if (tv1->mode > tv2->mode)
+ return 1;
+ if (tv1->length < tv2->length)
+ return -1;
+ if (tv1->length > tv2->length)
+ return 1;
+ if (tv1->value < tv2->value)
+ return -1;
+ if (tv1->value > tv2->value)
+ return 1;
+
+ return 0;
+}
+
/** finds tarval with value/mode or creates new tarval */
-static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
+static tarval *get_tarval(const void *value, int length, ir_mode *mode)
+{
tarval tv;
tv.kind = k_tarval;
case irms_int_number:
if (sc_comp(value, get_mode_max(mode)->value) == 1) {
- switch (GET_OVERFLOW_MODE()) {
+ switch (tarval_get_integer_overflow_mode()) {
case TV_OVERFLOW_SATURATE:
return get_mode_max(mode);
case TV_OVERFLOW_WRAP:
}
}
if (sc_comp(value, get_mode_min(mode)->value) == -1) {
- switch (GET_OVERFLOW_MODE()) {
+ switch (tarval_get_integer_overflow_mode()) {
case TV_OVERFLOW_SATURATE:
return get_mode_min(mode);
case TV_OVERFLOW_WRAP: {
break;
case irms_float_number:
- if (SWITCH_NOINFINITY && fc_is_inf(value)) {
+#ifdef SWITCH_NOINFINITY
+ if (fc_is_inf(value)) {
/* clip infinity to maximum value */
return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
}
+#endif
- if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
+#ifdef SWITCH_NODENORMALS
+ if (fc_is_subnormal(value)) {
/* clip denormals to zero */
return get_mode_null(mode);
}
+#endif
break;
default:
/*
* public variables declared in tv.h
*/
-static tarval reserved_tv[4];
+static tarval reserved_tv[6];
-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_b_false = &reserved_tv[0];
+tarval *tarval_b_true = &reserved_tv[1];
+tarval *tarval_bad = &reserved_tv[2];
+tarval *tarval_undefined = &reserved_tv[3];
+tarval *tarval_reachable = &reserved_tv[4];
+tarval *tarval_unreachable = &reserved_tv[5];
-/*
- * public functions declared in tv.h
+/**
+ * get the float descriptor for given mode.
*/
+static const ieee_descriptor_t *get_descriptor(const ir_mode *mode)
+{
+ switch (get_mode_size_bits(mode)) {
+ case 16: return &half_desc;
+ case 32: return &single_desc;
+ case 64: return &double_desc;
+ case 80:
+ case 96:
+ case 128: return &extended_desc; /* FIXME: HACK for x86 where we have
+ sizeof(long double)==16 with 10 byte
+ real payload */
+ /* case 128: return &quad_desc; */
+ default:
+ panic("Unsupported mode in get_descriptor()");
+ }
+}
+
+tarval *new_integer_tarval_from_str(const char *str, size_t len, char sign,
+ unsigned char base, ir_mode *mode)
+{
+ void *buffer;
+ int ok;
+
+ buffer = alloca(sc_get_buffer_length());
+
+ ok = sc_val_from_str(sign, base, str, len, buffer);
+ if (!ok)
+ return tarval_bad;
+
+ return get_tarval_overflow(buffer, sc_get_buffer_length(), mode);
+}
+
+static tarval *new_tarval_from_str_int(const char *str, size_t len,
+ ir_mode *mode)
+{
+ void *buffer;
+ unsigned base = 10;
+ char sign = 1;
+ int ok;
+
+ /* skip leading spaces */
+ while (len > 0 && str[0] == ' ') {
+ ++str;
+ --len;
+ }
+ if (len == 0)
+ return tarval_bad;
+
+ /* 1 sign character allowed */
+ if (str[0] == '-') {
+ sign = -1;
+ ++str;
+ --len;
+ } else if (str[0] == '+') {
+ ++str;
+ --len;
+ }
+
+ /* a number starting with '0x' is hexadeciaml,
+ * a number starting with '0' (and at least 1 more char) is octal */
+ if (len >= 2 && str[0] == '0') {
+ if (str[1] == 'x' || str[1] == 'X') {
+ str += 2;
+ len -= 2;
+ base = 16;
+ } else {
+ ++str;
+ --len;
+ base = 8;
+ }
+ }
+ if (len == 0)
+ return tarval_bad;
+
+ buffer = alloca(sc_get_buffer_length());
+
+ ok = sc_val_from_str(sign, base, str, len, buffer);
+ if (!ok)
+ return tarval_bad;
+
+ return get_tarval_overflow(buffer, sc_get_buffer_length(), mode);
+}
/*
* Constructors =============================================================
*/
tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
{
+ const ieee_descriptor_t *desc;
+
assert(str);
assert(len);
assert(mode);
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- break;
+ panic("Unsupported tarval creation with mode %F", 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")) return tarval_b_true;
+ 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;
case irms_float_number:
- 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:
- case 96:
- fc_val_from_str(str, len, 15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in new_tarval_from_str()");
- }
+ desc = get_descriptor(mode);
+ fc_val_from_str(str, len, desc, NULL);
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);
+ return new_tarval_from_str_int(str, len, mode);
}
-
- assert(0); /* can't be reached, can it? */
- return NULL;
+ panic("Unsupported tarval creation with mode %F", mode);
}
/*
* helper function, create a tarval from long
*/
-tarval *new_tarval_from_long(long l, ir_mode *mode) {
+tarval *new_tarval_from_long(long l, ir_mode *mode)
+{
assert(mode);
switch (get_mode_sort(mode)) {
return new_tarval_from_double((long double)l, mode);
default:
- assert(0 && "unsupported mode sort");
+ panic("unsupported mode sort");
}
- return NULL;
}
/* returns non-zero if can be converted to long */
-int tarval_is_long(tarval *tv) {
+int tarval_is_long(tarval *tv)
+{
if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
return 0;
}
/* this might overflow the machine's long, so use only with small values */
-long get_tarval_long(tarval* tv) {
+long get_tarval_long(tarval* tv)
+{
assert(tarval_is_long(tv) && "tarval too big to fit in long");
return sc_val_to_long(tv->value);
}
-tarval *new_tarval_from_double(long double d, ir_mode *mode) {
- assert(mode && (get_mode_sort(mode) == irms_float_number));
+tarval *new_tarval_from_double(long double d, ir_mode *mode)
+{
+ const ieee_descriptor_t *desc;
- switch (get_mode_size_bits(mode)) {
- case 32:
- fc_val_from_ieee754(d, 8, 23, NULL);
- break;
- case 64:
- fc_val_from_ieee754(d, 11, 52, NULL);
- break;
- case 80:
- case 96:
- fc_val_from_ieee754(d, 15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in new_tarval_from_double()");
- }
+ assert(mode && (get_mode_sort(mode) == irms_float_number));
+ desc = get_descriptor(mode);
+ fc_val_from_ieee754(d, desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
}
/* returns non-zero if can be converted to double */
-int tarval_is_double(tarval *tv) {
+int tarval_is_double(tarval *tv)
+{
assert(tv);
return (get_mode_sort(tv->mode) == irms_float_number);
}
-long double get_tarval_double(tarval *tv) {
+long double get_tarval_double(tarval *tv)
+{
assert(tarval_is_double(tv));
return fc_val_to_ieee754(tv->value);
*/
/* get the mode of the tarval */
-ir_mode *(get_tarval_mode)(const tarval *tv) {
+ir_mode *(get_tarval_mode)(const tarval *tv)
+{
return _get_tarval_mode(tv);
}
* therefore the irmode functions should be preferred to the functions below.
*/
-tarval *(get_tarval_bad)(void) {
+tarval *(get_tarval_bad)(void)
+{
return _get_tarval_bad();
}
-tarval *(get_tarval_undefined)(void) {
+tarval *(get_tarval_undefined)(void)
+{
return _get_tarval_undefined();
}
-tarval *(get_tarval_b_false)(void) {
+tarval *(get_tarval_b_false)(void)
+{
return _get_tarval_b_false();
}
-tarval *(get_tarval_b_true)(void) {
+tarval *(get_tarval_b_true)(void)
+{
return _get_tarval_b_true();
}
-tarval *get_tarval_max(ir_mode *mode) {
- assert(mode);
+tarval *(get_tarval_reachable)(void)
+{
+ return _get_tarval_reachable();
+}
+tarval *(get_tarval_unreachable)(void)
+{
+ return _get_tarval_unreachable();
+}
+
+tarval *get_tarval_max(ir_mode *mode)
+{
+ const ieee_descriptor_t *desc;
+
+ assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- break;
+ panic("mode %F does not support maximum value", mode);
case irms_internal_boolean:
return tarval_b_true;
case irms_float_number:
- 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:
- case 96:
- fc_get_max(15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in get_tarval_max()");
- }
+ desc = get_descriptor(mode);
+ fc_get_max(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_reference:
return tarval_bad;
}
-tarval *get_tarval_min(ir_mode *mode) {
- assert(mode);
+tarval *get_tarval_min(ir_mode *mode)
+{
+ const ieee_descriptor_t *desc;
+ assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- break;
+ panic("mode %F does not support minimum value", mode);
case irms_internal_boolean:
return tarval_b_false;
case irms_float_number:
- 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:
- case 96:
- fc_get_min(15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in get_tarval_min()");
- }
+ desc = get_descriptor(mode);
+ fc_get_min(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
case irms_reference:
/** The bit pattern for the pointer NULL */
static long _null_value = 0;
-tarval *get_tarval_null(ir_mode *mode) {
+tarval *get_tarval_null(ir_mode *mode)
+{
assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
return tarval_bad;
}
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- break;
+ panic("mode %F does not support null value", mode);
case irms_float_number:
return new_tarval_from_double(0.0, mode);
return tarval_bad;
}
-tarval *get_tarval_one(ir_mode *mode) {
+tarval *get_tarval_one(ir_mode *mode)
+{
assert(mode);
- if (get_mode_n_vector_elems(mode) > 1) {
- /* vector arithmetic not implemented yet */
- assert(0);
- return tarval_bad;
- }
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- break;
+ panic("mode %F does not support one value", mode);
case irms_internal_boolean:
return tarval_b_true;
return tarval_bad;
}
-tarval *get_tarval_all_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;
- }
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- assert(0);
- return tarval_bad;
+ panic("mode %F does not support all-one value", mode);
case irms_int_number:
case irms_internal_boolean:
return tarval_bad;
}
-tarval *get_tarval_minus_one(ir_mode *mode) {
+int tarval_is_constant(tarval *tv)
+{
+ int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
+
+ /* reserved tarvals are NOT constants. Note that although
+ tarval_b_true and tarval_b_false are reserved, they are constants of course. */
+ return (tv < &reserved_tv[2] || tv > &reserved_tv[num_res - 1]);
+}
+
+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;
- }
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
case irms_internal_boolean:
- assert(0);
- break;
+ panic("mode %F does not support minus one value", mode);
case irms_reference:
return tarval_bad;
return tarval_bad;
}
-tarval *get_tarval_nan(ir_mode *mode) {
- assert(mode);
+tarval *get_tarval_nan(ir_mode *mode)
+{
+ const ieee_descriptor_t *desc;
- if (get_mode_n_vector_elems(mode) > 1) {
- /* vector arithmetic not implemented yet */
- return tarval_bad;
- }
+ assert(mode);
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
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:
- case 96:
- fc_get_qnan(15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in get_tarval_nan()");
- }
+ desc = get_descriptor(mode);
+ fc_get_qnan(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- } else {
- assert(0 && "tarval is not floating point");
- return tarval_bad;
- }
+ } else
+ panic("mode %F does not support NaN value", mode);
}
-tarval *get_tarval_plus_inf(ir_mode *mode) {
+tarval *get_tarval_plus_inf(ir_mode *mode)
+{
assert(mode);
-
- if (get_mode_n_vector_elems(mode) > 1) {
- /* vector arithmetic not implemented yet */
- return tarval_bad;
- }
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
if (get_mode_sort(mode) == irms_float_number) {
- 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:
- case 96:
- fc_get_plusinf(15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in get_tarval_plus_inf()");
- }
+ const ieee_descriptor_t *desc = get_descriptor(mode);
+ fc_get_plusinf(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- } else {
- assert(0 && "tarval is not floating point");
- return tarval_bad;
- }
+ } else
+ panic("mode %F does not support +inf value", mode);
}
-tarval *get_tarval_minus_inf(ir_mode *mode) {
+tarval *get_tarval_minus_inf(ir_mode *mode)
+{
assert(mode);
- if (get_mode_n_vector_elems(mode) > 1) {
- /* vector arithmetic not implemented yet */
- return tarval_bad;
- }
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
if (get_mode_sort(mode) == irms_float_number) {
- 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:
- case 96:
- fc_get_minusinf(15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in get_tarval_minus_inf()");
- }
+ const ieee_descriptor_t *desc = get_descriptor(mode);
+ fc_get_minusinf(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- } else {
- assert(0 && "tarval is not floating point");
- return tarval_bad;
- }
+ } else
+ panic("mode %F does not support -inf value", mode);
}
/*
- * Arithmethic operations on tarvals ========================================
+ * Arithmetic operations on tarvals ========================================
*/
/*
* test if negative number, 1 means 'yes'
*/
-int tarval_is_negative(tarval *a) {
- 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;
- }
+int tarval_is_negative(tarval *a)
+{
+ if (get_mode_n_vector_elems(a->mode) > 1)
+ panic("vector arithmetic not implemented yet");
switch (get_mode_sort(a->mode)) {
case irms_int_number:
return fc_is_negative(a->value);
default:
- assert(0 && "not implemented");
- return 0;
+ panic("mode %F does not support negation value", a->mode);
}
}
/*
* test if null, 1 means 'yes'
*/
-int tarval_is_null(tarval *a) {
+int tarval_is_null(tarval *a)
+{
return
a != tarval_bad &&
a == get_mode_null(get_tarval_mode(a));
/*
* test if one, 1 means 'yes'
*/
-int tarval_is_one(tarval *a) {
+int tarval_is_one(tarval *a)
+{
return
a != tarval_bad &&
a == get_mode_one(get_tarval_mode(a));
}
-int tarval_is_all_one(tarval *tv) {
+int tarval_is_all_one(tarval *tv)
+{
return
tv != tarval_bad &&
tv == get_mode_all_one(get_tarval_mode(tv));
/*
* test if one, 1 means 'yes'
*/
-int tarval_is_minus_one(tarval *a) {
+int tarval_is_minus_one(tarval *a)
+{
return
a != tarval_bad &&
a == get_mode_minus_one(get_tarval_mode(a));
/*
* comparison
*/
-pn_Cmp tarval_cmp(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+pn_Cmp tarval_cmp(tarval *a, tarval *b)
+{
+ carry_flag = -1;
if (a == tarval_bad || b == tarval_bad) {
- assert(0 && "Comparison with tarval_bad");
- return pn_Cmp_False;
+ panic("Comparison with tarval_bad");
}
if (a == tarval_undefined || b == tarval_undefined)
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
- assert(0 && "cmp not implemented for vector modes");
+ panic("cmp not implemented for vector modes");
}
/* Here the two tarvals are unequal and of the same mode */
return pn_Cmp_False;
case irms_float_number:
- if (no_float)
- return pn_Cmp_False;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return pn_Cmp_False;*/
/*
* BEWARE: we cannot compare a == b here, because
* a NaN is always Unordered to any other value, even to itself!
/*
* convert to other mode
*/
-tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
- char *buffer;
- fp_value *res;
+tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode)
+{
+ char *buffer;
+ fp_value *res;
+ const ieee_descriptor_t *desc;
+ int len;
+
+ carry_flag = -1;
assert(src);
assert(dst_mode);
- if (src->mode == dst_mode) return src;
+ if (src->mode == dst_mode)
+ return src;
if (get_mode_n_vector_elems(src->mode) > 1) {
/* vector arithmetic not implemented yet */
case irms_float_number:
switch (get_mode_sort(dst_mode)) {
case irms_float_number:
- switch (get_mode_size_bits(dst_mode)) {
- case 32:
- fc_cast(src->value, 8, 23, NULL);
- break;
- case 64:
- fc_cast(src->value, 11, 52, NULL);
- break;
- case 80:
- case 96:
- fc_cast(src->value, 15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in tarval_convert_to()");
- }
+ desc = get_descriptor(dst_mode);
+ fc_cast(src->value, desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
case irms_int_number:
- switch (GET_FLOAT_TO_INT_MODE()) {
+ switch (current_float_to_int_mode) {
case TRUNCATE:
res = fc_int(src->value, NULL);
break;
case ROUND:
res = fc_rnd(src->value, NULL);
break;
- default:
- assert(0);
- break;
}
buffer = alloca(sc_get_buffer_length());
if (! fc_flt2int(res, buffer, dst_mode))
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",
+ len = 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(dst_mode)) {
- 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:
- case 96:
- fc_val_from_str(buffer, 0, 15, 64, NULL);
- break;
- default:
- panic("Unsupported mode in tarval_convert_to()");
- }
+ desc = get_descriptor(dst_mode);
+ fc_val_from_str(buffer, len, desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
default:
/*
* bitwise negation
*/
-tarval *tarval_not(tarval *a) {
+tarval *tarval_not(tarval *a)
+{
char *buffer;
- assert(a);
+ carry_flag = -1;
/* works for vector mode without changes */
return tarval_bad;
default:
- assert(0 && "bitwise negation is only allowed for integer and boolean");
- return tarval_bad;
+ panic("bitwise negation is only allowed for integer and boolean");
}
}
/*
* arithmetic negation
*/
-tarval *tarval_neg(tarval *a) {
+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) {
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
- return tarval_bad;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return tarval_bad;*/
fc_neg(a->value, NULL);
return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
/*
* addition
*/
-tarval *tarval_add(tarval *a, tarval *b) {
+tarval *tarval_add(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 || get_mode_n_vector_elems(b->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
+ if (mode_is_reference(a->mode) && a->mode != b->mode) {
+ b = tarval_convert_to(b, a->mode);
+ } else if (mode_is_reference(b->mode) && b->mode != a->mode) {
+ a = tarval_convert_to(a, b->mode);
+ }
+
+ assert(a->mode == b->mode);
+
switch (get_mode_sort(a->mode)) {
+ case irms_reference:
case irms_int_number:
/* 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:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_add(a->value, b->value, NULL);
/*
* subtraction
*/
-tarval *tarval_sub(tarval *a, tarval *b) {
- char *buffer;
+tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode)
+{
+ char *buffer;
- assert(a);
- assert(b);
- assert(a->mode == b->mode);
+ 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 */
return tarval_bad;
}
+
+ if (dst_mode != NULL) {
+ if (a->mode != dst_mode)
+ a = tarval_convert_to(a, dst_mode);
+ if (b->mode != dst_mode)
+ b = tarval_convert_to(b, dst_mode);
+ }
+ assert(a->mode == b->mode);
+
switch (get_mode_sort(a->mode)) {
+ case irms_reference:
case irms_int_number:
/* 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:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_sub(a->value, b->value, NULL);
/*
* multiplication
*/
-tarval *tarval_mul(tarval *a, tarval *b) {
+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;
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_mul(a->value, b->value, NULL);
/*
* floating point division
*/
-tarval *tarval_quo(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_quo(tarval *a, tarval *b)
+{
assert((a->mode == b->mode) && mode_is_float(a->mode));
- if(no_float)
+ carry_flag = -1;
+
+ if (no_float)
return tarval_bad;
if (get_mode_n_vector_elems(a->mode) > 1) {
* integer division
* overflow is impossible, but look out for division by zero
*/
-tarval *tarval_div(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_div(tarval *a, tarval *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;
* remainder
* overflow is impossible, but look out for division by zero
*/
-tarval *tarval_mod(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_mod(tarval *a, tarval *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;
* integer division AND remainder
* overflow is impossible, but look out for division by zero
*/
-tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
+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));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
/*
* absolute value
*/
-tarval *tarval_abs(tarval *a) {
+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) {
return a;
case irms_float_number:
- if(no_float)
- return tarval_bad;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return tarval_bad;*/
if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
fc_neg(a->value, NULL);
return a;
default:
- return tarval_bad;
+ break;
}
return tarval_bad;
}
/*
* bitwise and
*/
-tarval *tarval_and(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_and(tarval *a, tarval *b)
+{
assert(a->mode == b->mode);
/* works even for vector modes */
+ carry_flag = 0;
- switch(get_mode_sort(a->mode)) {
+ switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
return (a == tarval_b_false) ? a : b;
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
default:
- assert(0 && "operation not defined on mode");
- return tarval_bad;
+ panic("operation not defined on mode");
+ }
+}
+
+tarval *tarval_andnot(tarval *a, tarval *b)
+{
+ assert(a->mode == b->mode);
+
+ /* works even for vector modes */
+ carry_flag = 0;
+
+ switch (get_mode_sort(a->mode)) {
+ case irms_internal_boolean:
+ return a == tarval_b_true && b == tarval_b_false ? tarval_b_true : tarval_b_false;
+
+ case irms_int_number:
+ sc_andnot(a->value, b->value, NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
+
+ default:
+ panic("operation not defined on mode");
}
}
/*
* bitwise or
*/
-tarval *tarval_or (tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_or(tarval *a, tarval *b)
+{
assert(a->mode == b->mode);
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
default:
- assert(0 && "operation not defined on mode");
- return tarval_bad;
+ panic("operation not defined on mode");
}
}
/*
* bitwise exclusive or (xor)
*/
-tarval *tarval_eor(tarval *a, tarval *b) {
- assert(a);
- assert(b);
+tarval *tarval_eor(tarval *a, tarval *b)
+{
assert((a->mode == b->mode));
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
default:
- assert(0 && "operation not defined on mode");
- return tarval_bad;;
+ panic("operation not defined on mode");
}
}
/*
* bitwise left shift
*/
-tarval *tarval_shl(tarval *a, tarval *b) {
+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;
/*
* bitwise unsigned right shift
*/
-tarval *tarval_shr(tarval *a, tarval *b) {
+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;
/*
* bitwise signed right shift
*/
-tarval *tarval_shrs(tarval *a, tarval *b) {
+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;
}
/*
- * bitwise rotation
+ * bitwise rotation to left
*/
-tarval *tarval_rot(tarval *a, tarval *b) {
+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;
} else
temp_val = (char*)b->value;
- sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
+ sc_rotl(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();
+int tarval_carry(void)
+{
+ if (carry_flag == -1)
+ panic("Carry undefined for the last operation");
+ return carry_flag;
}
/*
* Output of tarvals
*/
-int tarval_snprintf(char *buf, size_t len, tarval *tv) {
+int tarval_snprintf(char *buf, size_t len, tarval *tv)
+{
static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
const char *str;
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;
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
+ if (tv == tarval_bad)
+ return snprintf(buf, len, "<TV_BAD>");
+ if (tv == tarval_undefined)
+ return snprintf(buf, len, "<TV_UNDEF>");
+ if (tv == tarval_unreachable)
+ return snprintf(buf, len, "<TV_UNREACHABLE>");
+ if (tv == tarval_reachable)
+ return snprintf(buf, len, "<TV_REACHABLE>");
+ return snprintf(buf, len, "<TV_??""?>");
}
return 0;
/**
* Output of tarvals to stdio.
*/
-int tarval_printf(tarval *tv) {
+int tarval_printf(tarval *tv)
+{
char buf[1024];
int res;
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;
}
-char *get_tarval_bitpattern(tarval *tv) {
+char *get_tarval_bitpattern(tarval *tv)
+{
int i, j, pos = 0;
int n = get_mode_size_bits(tv->mode);
int bytes = (n + 7) / 8;
- char *res = xmalloc((n + 1) * sizeof(char));
+ char *res = XMALLOCN(char, n + 1);
unsigned char byte;
- for(i = 0; i < bytes; i++) {
+ for (i = 0; i < bytes; i++) {
byte = get_tarval_sub_bits(tv, i);
- for(j = 1; j < 256; j <<= 1)
- if(pos < n)
+ for (j = 1; j < 256; j <<= 1)
+ if (pos < n)
res[pos++] = j & byte ? '1' : '0';
}
/*
* access to the bitpattern
*/
-unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
+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, get_mode_size_bits(tv->mode), byte_ofs);
*
* Returns zero on success.
*/
-int set_tarval_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);
mode->tv_priv = modeinfo;
*
* This functions returns the mode info of a given mode.
*/
-const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) {
+const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode)
+{
assert(mode);
return mode->tv_priv;
* Returns non-zero if a given (integer) tarval has only one single bit
* set.
*/
-int tarval_is_single_bit(tarval *tv) {
+int tarval_is_single_bit(tarval *tv)
+{
int i, l;
int bits;
return bits;
}
+/*
+ * Return the number of set bits in a given (integer) tarval.
+ */
+int get_tarval_popcnt(tarval *tv)
+{
+ int i, l;
+ int bits;
+
+ if (!tv || tv == tarval_bad) return -1;
+ if (! mode_is_int(tv->mode)) return -1;
+
+ 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);
+
+ bits += popcnt(v);
+ }
+ return bits;
+}
+
+/**
+ * Return the number of the lowest set bit in a given (integer) tarval.
+ *
+ * @param tv the tarval
+ *
+ * @return number of lowest set bit or -1 on error
+ */
+int get_tarval_lowest_bit(tarval *tv)
+{
+ int i, l;
+
+ if (!tv || tv == tarval_bad) return -1;
+ if (! mode_is_int(tv->mode)) return -1;
+
+ l = get_mode_size_bytes(tv->mode);
+ for (i = 0; i < l; ++i) {
+ unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
+
+ if (v)
+ return ntz(v) + i * 8;
+ }
+ return -1;
+}
+
/*
* Returns non-zero if the mantissa of a floating point IEEE-754
* tarval is zero (i.e. 1.0Exxx)
*/
-int tarval_ieee754_zero_mantissa(tarval *tv) {
+int tarval_ieee754_zero_mantissa(tarval *tv)
+{
assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
return fc_zero_mantissa(tv->value);
}
/* Returns the exponent of a floating point IEEE-754 tarval. */
-int tarval_ieee754_get_exponent(tarval *tv) {
+int tarval_ieee754_get_exponent(tarval *tv)
+{
assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
return fc_get_exponent(tv->value);
}
+/*
+ * Check if the tarval can be converted to the given mode without
+ * precision loss.
+ */
+int tarval_ieee754_can_conv_lossless(tarval *tv, ir_mode *mode)
+{
+ const ieee_descriptor_t *desc = get_descriptor(mode);
+ return fc_can_lossless_conv_to(tv->value, desc);
+}
+
/* Set the immediate precision for IEEE-754 results. */
-unsigned tarval_ieee754_set_immediate_precision(unsigned bits) {
+unsigned tarval_ieee754_set_immediate_precision(unsigned bits)
+{
return fc_set_immediate_precision(bits);
}
/* Returns non-zero if the result of the last IEEE-754 operation was exact. */
-unsigned tarval_ieee754_get_exact(void) {
+unsigned tarval_ieee754_get_exact(void)
+{
return fc_is_exact();
}
+/* Return the size of the mantissa in bits (including possible
+ implicit bits) for the given mode. */
+unsigned tarval_ieee754_get_mantissa_size(const ir_mode *mode)
+{
+ const ieee_descriptor_t *desc;
+
+ assert(get_mode_arithmetic(mode) == irma_ieee754);
+ desc = get_descriptor(mode);
+
+ return desc->mantissa_size + desc->explicit_one;
+}
+
/* check if its the a floating point NaN */
-int tarval_is_NaN(tarval *tv) {
+int tarval_is_NaN(tarval *tv)
+{
if (! mode_is_float(tv->mode))
return 0;
return fc_is_nan(tv->value);
}
/* check if its the a floating point +inf */
-int tarval_is_plus_inf(tarval *tv) {
+int tarval_is_plus_inf(tarval *tv)
+{
if (! mode_is_float(tv->mode))
return 0;
return fc_is_inf(tv->value) && !fc_is_negative(tv->value);
}
/* check if its the a floating point -inf */
-int tarval_is_minus_inf(tarval *tv) {
+int tarval_is_minus_inf(tarval *tv)
+{
if (! mode_is_float(tv->mode))
return 0;
return fc_is_inf(tv->value) && fc_is_negative(tv->value);
}
/* check if the tarval represents a finite value */
-int tarval_is_finite(tarval *tv) {
+int tarval_is_finite(tarval *tv)
+{
if (mode_is_float(tv->mode))
return !fc_is_nan(tv->value) && !fc_is_inf(tv->value);
return 1;
/*
* Sets the overflow mode for integer operations.
*/
-void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
+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) {
+tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void)
+{
return int_overflow_mode;
}
/* 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;
}
/**
/*
* Initialization of the tarval module: called before init_mode()
*/
-void init_tarval_1(long null_value) {
+void init_tarval_1(long null_value, int support_quad_precision)
+{
+ /* if these assertion fail, tarval_is_constant() will follow ... */
+ assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!");
+ assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!");
+
_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);
+ tarvals = new_set(cmp_tv, 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);
+ /* calls init_strcalc() with needed size */
+ init_fltcalc(support_quad_precision ? 112 : 64);
}
/*
* Initialization of the tarval module: called after init_mode()
*/
-void init_tarval_2(void) {
- tarval_bad->kind = k_tarval;
- tarval_bad->mode = mode_BAD;
- tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
+void init_tarval_2(void)
+{
+ 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_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_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);
- tarval_b_false->kind = k_tarval;
- tarval_b_false->mode = mode_b;
- tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
+ tarval_unreachable->kind = k_tarval;
+ tarval_unreachable->mode = mode_X;
+ tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable);
+
+ tarval_reachable->kind = k_tarval;
+ tarval_reachable->mode = mode_X;
+ tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable);
/*
* assign output modes that are compatible with the
}
/* free all memory occupied by tarval. */
-void finish_tarval(void) {
+void finish_tarval(void)
+{
finish_strcalc();
finish_fltcalc();
del_set(tarvals); tarvals = NULL;
del_set(values); values = NULL;
}
+int (is_tarval)(const void *thing)
+{
+ return _is_tarval(thing);
+}
+
/****************************************************************************
* end of tv.c
****************************************************************************/
projects / libfirm / blobdiff