/*
- * 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 <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>
-#endif
+#include <stdlib.h>
#include "tv_t.h"
#include "set.h" /* to store tarvals in */
#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 */
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) {
tarval tv;
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());
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), 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());
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), 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:
return get_mode_min(mode);
case TV_OVERFLOW_WRAP: {
char *temp = alloca(sc_get_buffer_length());
- sc_val_from_ulong(-1, temp);
- sc_and(temp, value, temp);
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), temp);
return get_tarval(temp, length, mode);
}
case TV_OVERFLOW_BAD:
case irms_float_number:
if (SWITCH_NOINFINITY && fc_is_inf(value)) {
- return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode);
+ /* clip infinity to maximum value */
+ return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
}
if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
+ /* clip denormals to zero */
return get_mode_null(mode);
}
break;
/*
* 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];
+
+/**
+ * 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: return &extended_desc;
+ case 128: return &quad_desc;
+ default:
+ panic("Unsupported mode in get_descriptor()");
+ return NULL;
+ }
+}
/*
* public functions declared in tv.h
*/
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:
- fc_val_from_str(str, len, 15, 64, NULL);
- break;
- }
+ 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);
}
-
- assert(0); /* can't be reached, can it? */
- return NULL;
+ panic("Unsupported tarval creation with mode %F", mode);
}
/*
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 ;
/* same as integer modes */
case irms_int_number:
sc_val_from_long(l, NULL);
- sign_extend(sc_get_buffer(), mode);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
case irms_float_number:
}
tarval *new_tarval_from_double(long double d, ir_mode *mode) {
- assert(mode && (get_mode_sort(mode) == irms_float_number));
+ 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:
- fc_val_from_ieee754(d, 15, 64, NULL);
- break;
- }
+ 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);
}
return _get_tarval_b_true();
}
+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) {
- assert(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)) {
- case irms_reference:
+ 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:
- fc_get_max(15, 64, NULL);
- break;
- }
+ desc = get_descriptor(mode);
+ fc_get_max(desc, NULL);
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;
}
tarval *get_tarval_min(ir_mode *mode) {
- assert(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)) {
- case irms_reference:
+ 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:
- fc_get_min(15, 64, NULL);
- break;
- }
+ desc = get_descriptor(mode);
+ fc_get_min(desc, NULL);
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);
return tarval_bad;
}
- 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 null value", mode);
case irms_float_number:
return new_tarval_from_double(0.0, mode);
+ case irms_internal_boolean:
case irms_int_number:
return new_tarval_from_long(0l, mode);
tarval *get_tarval_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:
+ panic("mode %F does not support one value", mode);
+
case irms_internal_boolean:
- case irms_reference:
- assert(0);
- break;
+ 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 */
- return tarval_bad;
+ if (get_mode_n_vector_elems(mode) > 1)
+ panic("vector arithmetic not implemented yet");
+
+ switch (get_mode_sort(mode)) {
+ case irms_control_flow:
+ case irms_memory:
+ case irms_auxiliary:
+ panic("mode %F does not support all-one value", mode);
+
+ 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;
+}
+
+int tarval_is_constant(tarval *tv) {
+ int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
- switch(get_mode_sort(mode)) {
+ /* 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)
+ panic("vector arithmetic not implemented yet");
+
+ switch (get_mode_sort(mode)) {
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
case irms_internal_boolean:
+ panic("mode %F does not support minus one value", mode);
+
case irms_reference:
- assert(0);
- break;
+ return tarval_bad;
case irms_float_number:
return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
}
tarval *get_tarval_nan(ir_mode *mode) {
- assert(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:
- fc_get_qnan(15, 64, NULL);
- break;
- }
+ 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) {
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:
- fc_get_plusinf(15, 64, NULL);
- break;
- }
+ 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) {
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:
- fc_get_minusinf(15, 64, NULL);
- break;
- }
+ 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;
- }
+ 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 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 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) {
- ir_mode *m = get_tarval_mode(a);
-
- return a == get_tarval_null(m);
+ return
+ a != tarval_bad &&
+ a == get_mode_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_mode_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));
+}
+
+/*
+ * test if one, 1 means 'yes'
+ */
+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);
+ carry_flag = -1;
if (a == tarval_bad || b == tarval_bad) {
- assert(0 && "Comparison with tarval_bad");
+ panic("Comparison with tarval_bad");
return pn_Cmp_False;
}
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 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!
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) {
- char *buffer;
+tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
+ char *buffer;
+ fp_value *res;
+ const ieee_descriptor_t *desc;
+
+ carry_flag = -1;
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)) {
- 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);
+ 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()) {
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);
+ panic("Unsupported float to int conversion mode in tarval_convert_to()");
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;
+ buffer = alloca(sc_get_buffer_length());
+ if (! fc_flt2int(res, buffer, dst_mode))
+ return tarval_bad;
+ return get_tarval(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)) {
- 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);
-
- case irms_reference:
- /* allow 0 to be casted */
- if (src == get_mode_null(src->mode))
- return get_mode_null(m);
- break;
+ desc = get_descriptor(dst_mode);
+ fc_val_from_str(buffer, 0, desc, NULL);
+ 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;
}
tarval *tarval_not(tarval *a) {
char *buffer;
- assert(a);
+ carry_flag = -1;
/* 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);
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);
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);
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);
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) {
* overflow is impossible, but look out for division by zero
*/
tarval *tarval_div(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_int(a->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
* overflow is impossible, but look out for division by zero
*/
tarval *tarval_mod(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode) && mode_is_int(a->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
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->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;
+ }
+
+
+ /* 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
*/
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);
* bitwise and
*/
tarval *tarval_and(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert(a->mode == b->mode);
/* works even for vector modes */
+ carry_flag = 0;
- switch(get_mode_sort(a->mode)) {
+ switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
return (a == tarval_b_false) ? a : b;
/*
* 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:
* bitwise exclusive or (xor)
*/
tarval *tarval_eor(tarval *a, tarval *b) {
- assert(a);
- assert(b);
assert((a->mode == b->mode));
/* works even for vector modes */
+ carry_flag = 0;
switch (get_mode_sort(a->mode)) {
case irms_internal_boolean:
tarval *tarval_shl(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_shr(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
tarval *tarval_shrs(tarval *a, tarval *b) {
char *temp_val = NULL;
- assert(a);
- assert(b);
assert(mode_is_int(a->mode) && mode_is_int(b->mode));
+ carry_flag = -1;
+
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
/*
- * 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();
+ if (carry_flag == -1)
+ panic("Carry undefined for the last operation");
+ return carry_flag;
}
/*
switch (get_mode_sort(tv->mode)) {
case irms_reference:
if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
- /* fall through */
+ /* FALLTHROUGH */
case irms_int_number:
switch (mode_info->mode_output) {
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
break;
- case TVO_HEX:
case TVO_NATIVE:
+ prefix = "0x";
+ case TVO_HEX:
default:
str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
break;
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;
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;
}
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++) {
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 == get_mode_minus_one(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.
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) {
return fc_set_immediate_precision(bits);
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) {
+ 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) {
+ 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) {
+ 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) {
+ 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.
*/
}
/* 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);
+ 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
del_set(values); values = NULL;
}
+int (is_tarval)(const void *thing) {
+ return _is_tarval(thing);
+}
+
/****************************************************************************
* end of tv.c
****************************************************************************/
projects / libfirm / blobdiff