X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=1892f6f7bd3bb6757114a949922a018d9b5bef02;hb=800e4d37cd161f66232656944211a718ce007a4b;hp=b585f3cb7012fd0a6d24eed7efe13a6a82a59517;hpb=992281da35715f152a519e9b3475796194ea14b8;p=libfirm diff --git a/ir/tv/tv.c b/ir/tv/tv.c index b585f3cb7..1892f6f7b 100644 --- a/ir/tv/tv.c +++ b/ir/tv/tv.c @@ -1,46 +1,45 @@ /* - * 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. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. + * + * This file is part of libFirm. + * + * This file may be distributed and/or modified under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation and appearing in the file LICENSE.GPL included in the + * packaging of this file. + * + * Licensees holding valid libFirm Professional Edition licenses may use + * this file in accordance with the libFirm Commercial License. + * Agreement provided with the Software. + * + * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE + * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. */ -/* - * Values are stored in a format depending upon chosen arithmetic - * module. Default uses strcalc and fltcalc. +/** + * @file + * @brief Representation of and static computations on target machine + * values. + * @date 2003 + * @author Mathias Heil + * @version $Id$ + * @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. */ - -/* This implementation assumes: - * - target has IEEE-754 floating-point arithmetic. */ - - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - +#include "config.h" #include /* assertions */ #include /* atoi() */ -#ifdef HAVE_STRING_H -# include /* nice things for strings */ -#endif +#include #ifdef HAVE_STRINGS_H #include /* strings.h also includes bsd only function strcasecmp */ #endif #include -#ifdef HAVE_ALLOCA_H -# include -#endif -#ifdef HAVE_MALLOC_H -# include -#endif #include "tv_t.h" #include "set.h" /* to store tarvals in */ @@ -49,6 +48,10 @@ #include "irnode.h" /* defines boolean return values (pnc_number)*/ #include "strcalc.h" #include "fltcalc.h" +#include "irtools.h" +#include "xmalloc.h" +#include "firm_common.h" +#include "error.h" /** Size of hash tables. Should correspond to average number of distinct constant target values */ @@ -59,8 +62,8 @@ /* unused, float to int doesn't work yet */ enum float_to_int_mode { - TRUNCATE, - ROUND + TRUNCATE, + ROUND }; #define GET_FLOAT_TO_INT_MODE() TRUNCATE @@ -84,19 +87,33 @@ enum float_to_int_mode { #define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size))) #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__) -#if 0 -static long long count = 0; -# define ANNOUNCE() printf(__FILE__": call no. %lld (%s)\n", count++, __FUNCTION__); -#else -# define ANNOUNCE() ((void)0) -#endif -/**************************************************************************** - * private variables - ****************************************************************************/ -static struct set *tarvals; /* container for tarval structs */ -static struct set *values; /* 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 ****************************************************************************/ @@ -105,70 +122,94 @@ static int hash_val(const void *value, unsigned int length); static int hash_tv(tarval *tv); static void _fail_verify(tarval *tv, const char* file, int line) { - /* 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); - else - printf("%s:%d: Invalid tarval (null)", file, line); - assert(0); + /* print a memory image of the tarval and throw an assertion */ + if (tv) + panic("%s:%d: Invalid tarval: mode: %F\n value: [%p]", file, line, tv->mode, tv->value); + else + 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); - assert(tv->value); + assert(tv); + assert(tv->mode); + assert(tv->value); - if ((tv == tarval_bad) || (tv == tarval_undefined)) return; - if ((tv == tarval_b_true) || (tv == tarval_b_false)) return; + if ((tv == tarval_bad) || (tv == tarval_undefined)) return; + if ((tv == tarval_b_true) || (tv == tarval_b_false)) return; - if (!FIND_TARVAL(tv)) fail_verify(tv); - if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv); - - return; + if (!FIND_TARVAL(tv)) fail_verify(tv); + if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv); } #endif /* NDEBUG */ -static int hash_tv(tarval *tv) -{ - return ((unsigned int)tv->value ^ (unsigned int)tv->mode) + tv->length; +/** Hash a tarval. */ +static int hash_tv(tarval *tv) { + return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length; } -static int hash_val(const void *value, unsigned int length) -{ - unsigned int i; - unsigned int hash = 0; +/** Hash a value. Treat it as a byte array. */ +static int hash_val(const void *value, unsigned int length) { + unsigned int i; + unsigned int hash = 0; - /* scramble the byte - array */ - for (i = 0; i < length; i++) - { - hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i]; - hash += (hash << 11) ^ (hash >> 17); - } + /* scramble the byte - array */ + for (i = 0; i < length; ++i) { + hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i]; + hash += (hash << 11) ^ (hash >> 17); + } - return hash; + return hash; } -/* 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.length = length; - 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 { - tv.value = value; - } - /* if there is such a tarval, it is returned, else tv is copied - * into the set */ - return (tarval *)INSERT_TARVAL(&tv); +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; + + tv.kind = k_tarval; + tv.mode = mode; + tv.length = length; + if (length > 0) { + /* if there already is such a value, it is returned, else value + * is copied into the set */ + 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; + } + /* if there is such a tarval, it is returned, else tv is copied + * into the set */ + return (tarval *)INSERT_TARVAL(&tv); } /** @@ -176,83 +217,100 @@ static tarval *get_tarval(const void *value, int length, ir_mode *mode) */ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) { - switch (get_mode_sort(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()); - 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: - 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 get_tarval(value, length, 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: + 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_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()); + 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: + return tarval_bad; + default: + return get_tarval(value, length, mode); + } + } + break; + + case irms_float_number: + if (SWITCH_NOINFINITY && fc_is_inf(value)) { + /* 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; + + default: + break; + } + return get_tarval(value, length, mode); } - /* * public variables declared in tv.h */ -static tarval reserved_tv[5]; +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_P_void = &reserved_tv[4]; +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 @@ -263,149 +321,113 @@ tarval *tarval_P_void = &reserved_tv[4]; */ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) { - ANNOUNCE(); - assert(str); - assert(len); - assert(mode); - - switch (get_mode_sort(mode)) - { - case irms_control_flow: - case irms_memory: - case irms_auxiliary: - assert(0); - break; - - 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; - 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; - } - return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - - case irms_int_number: - case irms_character: - sc_val_from_str(str, len, NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); - - case irms_reference: - return get_tarval(str, len, mode); - } - - assert(0); /* can't be reached, can it? */ - return NULL; + const ieee_descriptor_t *desc; + + assert(str); + assert(len); + assert(mode); + + switch (get_mode_sort(mode)) { + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + 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_false; + else + /* XXX This is C semantics */ + return atoi(str) ? tarval_b_true : tarval_b_false; + + case irms_float_number: + 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: + 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); + } + 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) -{ - ANNOUNCE(); - assert(mode); - - switch(get_mode_sort(mode)) - { - case irms_internal_boolean: - /* XXX C semantics ! */ - return l ? tarval_b_true : tarval_b_false ; - - case irms_int_number: - case irms_character: - sc_val_from_long(l, NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); - - case irms_float_number: - return new_tarval_from_double((long double)l, mode); - - case irms_reference: - return l ? tarval_bad : get_tarval(NULL, 0, mode); /* null pointer or tarval_bad */ - - default: - assert(0 && "unsupported mode sort"); - } - return NULL; +tarval *new_tarval_from_long(long l, ir_mode *mode) { + assert(mode); + + switch (get_mode_sort(mode)) { + case irms_internal_boolean: + /* XXX C semantics ! */ + return l ? tarval_b_true : tarval_b_false ; + + case irms_reference: + /* same as integer modes */ + case irms_int_number: + sc_val_from_long(l, NULL); + return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); + + case irms_float_number: + return new_tarval_from_double((long double)l, mode); + + default: + assert(0 && "unsupported mode sort"); + } + return NULL; } /* returns non-zero if can be converted to long */ -int tarval_is_long(tarval *tv) -{ - mode_sort sort = get_mode_sort(tv->mode); - - ANNOUNCE(); - if (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; +int tarval_is_long(tarval *tv) { + if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode)) + return 0; + + if (get_mode_size_bits(tv->mode) > (int) (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 get_tarval_long(tarval* tv) -{ - ANNOUNCE(); - assert(tarval_is_long(tv) && "tarval too big to fit in long"); +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); + 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)); - - 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); +tarval *new_tarval_from_double(long double d, ir_mode *mode) { + const ieee_descriptor_t *desc; + + 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) -{ - ANNOUNCE(); - assert(tv); +int tarval_is_double(tarval *tv) { + assert(tv); - return (get_mode_sort(tv->mode) == irms_float_number); + return (get_mode_sort(tv->mode) == irms_float_number); } -long double get_tarval_double(tarval *tv) -{ - ANNOUNCE(); - assert(tarval_is_double(tv)); +long double get_tarval_double(tarval *tv) { + assert(tarval_is_double(tv)); - return fc_val_to_float(tv->value); + return fc_val_to_ieee754(tv->value); } @@ -415,7 +437,7 @@ long double get_tarval_double(tarval *tv) /* get the mode of the tarval */ ir_mode *(get_tarval_mode)(const tarval *tv) { - return _get_tarval_mode(tv); + return _get_tarval_mode(tv); } /* @@ -425,1177 +447,1109 @@ ir_mode *(get_tarval_mode)(const tarval *tv) { * value. * The functions get_mode_{Max,Min,...} return tarvals retrieved from these * functions, but these are stored on initialization of the irmode module and - * therefore the irmode functions should be prefered to the functions below. + * therefore the irmode functions should be preferred to the functions below. */ tarval *(get_tarval_bad)(void) { - return _get_tarval_bad(); + return _get_tarval_bad(); } tarval *(get_tarval_undefined)(void) { - return _get_tarval_undefined(); + return _get_tarval_undefined(); } tarval *(get_tarval_b_false)(void) { - return _get_tarval_b_false(); + return _get_tarval_b_false(); } tarval *(get_tarval_b_true)(void) { - return _get_tarval_b_true(); + return _get_tarval_b_true(); } -tarval *(get_tarval_P_void)(void) { - return _get_tarval_P_void(); +tarval *(get_tarval_reachable)(void) { + return _get_tarval_reachable(); } -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: - case irms_control_flow: - case irms_memory: - case irms_auxiliary: - assert(0); - break; - - 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; - } - 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), NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); - } - return tarval_bad; -} - -tarval *get_tarval_min(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: - case irms_control_flow: - case irms_memory: - case irms_auxiliary: - assert(0); - break; - - 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; - } - 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), NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); - } - return tarval_bad; -} - -tarval *get_tarval_null(ir_mode *mode) -{ - ANNOUNCE(); - assert(mode); +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)) { + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + panic("mode %F does not support maximum value", mode); + + case irms_internal_boolean: + return tarval_b_true; + + case irms_float_number: + desc = get_descriptor(mode); + fc_get_max(desc, NULL); + return get_tarval(fc_get_buffer(), fc_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) { + 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_control_flow: + case irms_memory: + case irms_auxiliary: + panic("mode %F does not support minimum value", mode); + + case irms_internal_boolean: + return tarval_b_false; + + case irms_float_number: + desc = get_descriptor(mode); + fc_get_min(desc, NULL); + return get_tarval(fc_get_buffer(), fc_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 = 0; - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } +tarval *get_tarval_null(ir_mode *mode) { + assert(mode); - switch(get_mode_sort(mode)) - { - case irms_control_flow: - case irms_memory: - case irms_auxiliary: - case irms_internal_boolean: - assert(0); - break; + if (get_mode_n_vector_elems(mode) > 1) { + /* vector arithmetic not implemented yet */ + return tarval_bad; + } - case irms_float_number: - return new_tarval_from_double(0.0, mode); + switch (get_mode_sort(mode)) { + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + panic("mode %F does not support null value", mode); - case irms_int_number: - case irms_character: - return new_tarval_from_long(0l, mode); + case irms_float_number: + return new_tarval_from_double(0.0, mode); - case irms_reference: - return tarval_P_void; - } - return tarval_bad; + case irms_internal_boolean: + case irms_int_number: + return new_tarval_from_long(0l, mode); + + case irms_reference: + return new_tarval_from_long(_null_value, mode); + } + return tarval_bad; } -tarval *get_tarval_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 new_tarval_from_double(1.0, mode); - - case irms_int_number: - case irms_character: - return new_tarval_from_long(1l, mode); - break; - } - 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) { - 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 { - assert(0 && "tarval is not floating point"); - return tarval_bad; - } -} - -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) { - 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 { - assert(0 && "tarval is not floating point"); - return tarval_bad; - } +tarval *get_tarval_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: + panic("mode %F does not support one value", mode); + + case irms_internal_boolean: + return tarval_b_true; + + case irms_float_number: + return new_tarval_from_double(1.0, mode); + + case irms_reference: + case irms_int_number: + return new_tarval_from_long(1l, mode); + } + return tarval_bad; +} + +tarval *get_tarval_all_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: + 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]); + + /* 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: + return tarval_bad; + + case irms_float_number: + return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad; + + case irms_int_number: + return new_tarval_from_long(-1l, mode); + } + return tarval_bad; +} + +tarval *get_tarval_nan(ir_mode *mode) { + const ieee_descriptor_t *desc; + + assert(mode); + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); + + if (get_mode_sort(mode) == irms_float_number) { + desc = get_descriptor(mode); + fc_get_qnan(desc, NULL); + return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); + } 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) + panic("vector arithmetic not implemented yet"); + + if (get_mode_sort(mode) == irms_float_number) { + 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 + 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) + panic("vector arithmetic not implemented yet"); + + if (get_mode_sort(mode) == irms_float_number) { + 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 + 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) -{ - 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; - - case irms_float_number: - return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0; - - default: - assert(0 && "not implemented"); - 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: + if (!mode_is_signed(a->mode)) return 0; + else + return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0; + + case irms_float_number: + return fc_is_negative(a->value); + + default: + 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); +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) -{ - ir_mode *m = get_tarval_mode(a); +int tarval_is_one(tarval *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) -{ - ANNOUNCE(); - assert(a); - assert(b); - - 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: - case irms_reference: - if (a == b) - return pn_Cmp_Eq; - return pn_Cmp_False; - - case irms_float_number: - /* - * BEWARE: we cannot compare a == b here, because - * a NaN is always Unordered to any other value, even to itself! - */ - switch (fc_comp(a->value, b->value)) { - case -1: return pn_Cmp_Lt; - case 0: return pn_Cmp_Eq; - case 1: return pn_Cmp_Gt; - case 2: return pn_Cmp_Uo; - default: return pn_Cmp_False; - } - case irms_int_number: - case irms_character: - if (a == b) - return pn_Cmp_Eq; - return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt; - - case irms_internal_boolean: - if (a == b) - return pn_Cmp_Eq; - return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt; - } - return pn_Cmp_False; +pn_Cmp tarval_cmp(tarval *a, tarval *b) { + carry_flag = -1; + + if (a == tarval_bad || b == tarval_bad) { + panic("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: + if (a == b) + return pn_Cmp_Eq; + return pn_Cmp_False; + + case irms_float_number: + /* 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! + */ + 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_reference: + case irms_int_number: + if (a == b) + return pn_Cmp_Eq; + return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt; + + case irms_internal_boolean: + if (a == b) + return pn_Cmp_Eq; + return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt; + } + return pn_Cmp_False; } /* * convert to other mode */ -tarval *tarval_convert_to(tarval *src, ir_mode *m) -{ - char *buffer; - - ANNOUNCE(); - assert(src); - assert(m); - - 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_memory: - case irms_auxiliary: - break; - - /* cast float to something */ - case irms_float_number: - switch (get_mode_sort(m)) { - 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); - - 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: - /* 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: - 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); - - 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; - } - break; - - case irms_character: - break; - case irms_reference: - break; - } - - return tarval_bad; +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(dst_mode); + + if (src->mode == dst_mode) + 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_memory: + case irms_auxiliary: + break; + + /* cast float to something */ + case irms_float_number: + switch (get_mode_sort(dst_mode)) { + case irms_float_number: + 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: + res = fc_int(src->value, NULL); + break; + case ROUND: + res = fc_rnd(src->value, NULL); + break; + default: + panic("Unsupported float to int conversion mode in tarval_convert_to()"); + break; + } + 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 */ + return tarval_bad; + } + break; + + /* cast int/characters to something */ + case irms_int_number: + 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, dst_mode); + return get_tarval_overflow(buffer, src->length, dst_mode); + + 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, mode_is_signed(src->mode))); + buffer[100 - 1] = '\0'; + 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: + /* 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: + 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, dst_mode); + } + break; + } + + return tarval_bad; } /* * bitwise negation */ -tarval *tarval_not(tarval *a) -{ - char *buffer; - - ANNOUNCE(); - assert(a); - assert(mode_is_int(a->mode)); /* bitwise negation is only allowed for integer */ - - /* 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); - - default: - return tarval_bad; - } +tarval *tarval_not(tarval *a) { + char *buffer; + + 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); + 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; +tarval *tarval_neg(tarval *a) { + char *buffer; + + assert(mode_is_num(a->mode)); /* negation only for numerical values */ - ANNOUNCE(); - assert(a); - assert(mode_is_num(a->mode)); /* negation only for numerical values */ + carry_flag = -1; - /* note: negation is allowed even for unsigned modes. */ + /* 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; - } + 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: - buffer = alloca(sc_get_buffer_length()); - sc_neg(a->value, buffer); - return get_tarval_overflow(buffer, a->length, a->mode); + switch (get_mode_sort(a->mode)) { + case irms_int_number: + 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, NULL); - return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + case irms_float_number: + /* it should be safe to enable this even if other arithmetic is disabled */ + /*if (no_float) + return tarval_bad;*/ - default: - return tarval_bad; - } + fc_neg(a->value, NULL); + return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + + default: + return tarval_bad; + } } /* * addition */ -tarval *tarval_add(tarval *a, tarval *b) -{ - char *buffer; - - ANNOUNCE(); - assert(a); - assert(b); - 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 */ - 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: - 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_add(tarval *a, tarval *b) { + char *buffer; + + 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) + return tarval_bad; + + fc_add(a->value, b->value, NULL); + return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + + default: + return tarval_bad; + } } /* * subtraction */ -tarval *tarval_sub(tarval *a, tarval *b) -{ - char *buffer; - - ANNOUNCE(); - assert(a); - assert(b); - 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 */ - 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: - 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_sub(tarval *a, tarval *b, ir_mode *dst_mode) { + char *buffer; + + 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) + return tarval_bad; + + fc_sub(a->value, b->value, NULL); + return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + + default: + return tarval_bad; + } } /* * multiplication */ -tarval *tarval_mul(tarval *a, tarval *b) -{ - char *buffer; +tarval *tarval_mul(tarval *a, tarval *b) { + char *buffer; + + assert(a->mode == b->mode); - ANNOUNCE(); - 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; - } + 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 */ - buffer = alloca(sc_get_buffer_length()); - sc_mul(a->value, b->value, buffer); - return get_tarval_overflow(buffer, a->length, a->mode); + switch (get_mode_sort(a->mode)) { + case irms_int_number: + /* modes of a,b are equal */ + 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: - fc_mul(a->value, b->value, NULL); - return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + case irms_float_number: + if (no_float) + return tarval_bad; - default: - return tarval_bad; - } + fc_mul(a->value, b->value, NULL); + return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + + default: + return tarval_bad; + } } /* * floating point division */ -tarval *tarval_quo(tarval *a, tarval *b) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert((a->mode == b->mode) && mode_is_float(a->mode)); +tarval *tarval_quo(tarval *a, tarval *b) { + assert((a->mode == b->mode) && mode_is_float(a->mode)); + + carry_flag = -1; - if (get_mode_n_vector_elems(a->mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } + if (no_float) + return tarval_bad; - fc_div(a->value, b->value, NULL); - return get_tarval_overflow(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) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert((a->mode == b->mode) && mode_is_int(a->mode)); +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; - } + 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, NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode); + /* 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, 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) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert((a->mode == b->mode) && mode_is_int(a->mode)); +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; + } + + /* 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, NULL); + 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; - } + 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, NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode); + + /* 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; - - 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) - { - 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: - 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; - } - return tarval_bad; +tarval *tarval_abs(tarval *a) { + char *buffer; + + carry_flag = -1; + 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) { + 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: + /* 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 get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + } + return a; + + default: + return tarval_bad; + } + return tarval_bad; } /* * bitwise and */ -tarval *tarval_and(tarval *a, tarval *b) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert(a->mode == b->mode); +tarval *tarval_and(tarval *a, tarval *b) { + assert(a->mode == b->mode); - /* works even for vector modes */ + /* works even for vector modes */ + carry_flag = 0; - switch(get_mode_sort(a->mode)) - { - case irms_internal_boolean: - return (a == tarval_b_false) ? a : b; + switch (get_mode_sort(a->mode)) { + case irms_internal_boolean: + return (a == tarval_b_false) ? a : b; - case irms_int_number: - sc_and(a->value, b->value, NULL); - 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; - } + default: + assert(0 && "operation not defined on mode"); + return tarval_bad; + } } /* * bitwise or */ -tarval *tarval_or (tarval *a, tarval *b) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert(a->mode == b->mode); +tarval *tarval_or(tarval *a, tarval *b) { + assert(a->mode == b->mode); - /* works even for vector modes */ + /* works even for vector modes */ + carry_flag = 0; - switch (get_mode_sort(a->mode)) - { - case irms_internal_boolean: - return (a == tarval_b_true) ? a : b; + switch (get_mode_sort(a->mode)) { + case irms_internal_boolean: + return (a == tarval_b_true) ? a : b; - case irms_int_number: - sc_or(a->value, b->value, NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), 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); - default: - assert(0 && "operation not defined on mode"); - return tarval_bad;; - } + default: + assert(0 && "operation not defined on mode"); + return tarval_bad; + } } /* * bitwise exclusive or (xor) */ -tarval *tarval_eor(tarval *a, tarval *b) -{ - ANNOUNCE(); - assert(a); - assert(b); - assert((a->mode == b->mode)); +tarval *tarval_eor(tarval *a, tarval *b) { + assert((a->mode == b->mode)); - /* works even for vector modes */ + /* works even for vector modes */ + carry_flag = 0; - switch (get_mode_sort(a->mode)) - { - case irms_internal_boolean: - return (a == b)? tarval_b_false : tarval_b_true; + 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); + 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;; - } + default: + assert(0 && "operation not defined on mode"); + return tarval_bad;; + } } /* * bitwise left shift */ -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)); +tarval *tarval_shl(tarval *a, tarval *b) { + char *temp_val = NULL; + + assert(mode_is_int(a->mode) && mode_is_int(b->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; - } + carry_flag = -1; - if (get_mode_modulo_shift(a->mode) != 0) - { - temp_val = alloca(sc_get_buffer_length()); + 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; + } - 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; + if (get_mode_modulo_shift(a->mode) != 0) { + temp_val = alloca(sc_get_buffer_length()); - 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); + 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); } /* * bitwise unsigned right shift */ -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)); +tarval *tarval_shr(tarval *a, tarval *b) { + char *temp_val = NULL; + + assert(mode_is_int(a->mode) && mode_is_int(b->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; - } + carry_flag = -1; - if (get_mode_modulo_shift(a->mode) != 0) - { - temp_val = alloca(sc_get_buffer_length()); + 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; + } - 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; + if (get_mode_modulo_shift(a->mode) != 0) { + temp_val = alloca(sc_get_buffer_length()); - 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); + 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); } /* * bitwise signed right shift */ -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)); +tarval *tarval_shrs(tarval *a, tarval *b) { + char *temp_val = NULL; + + assert(mode_is_int(a->mode) && mode_is_int(b->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; - } + carry_flag = -1; - if (get_mode_modulo_shift(a->mode) != 0) - { - temp_val = alloca(sc_get_buffer_length()); + 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; + } - 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; + if (get_mode_modulo_shift(a->mode) != 0) { + temp_val = alloca(sc_get_buffer_length()); - 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); + 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); } /* - * bitwise rotation + * bitwise rotation to left */ -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)); +tarval *tarval_rotl(tarval *a, tarval *b) { + char *temp_val = NULL; + + assert(mode_is_int(a->mode) && mode_is_int(b->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; - } + carry_flag = -1; - if (get_mode_modulo_shift(a->mode) != 0) - { - temp_val = alloca(sc_get_buffer_length()); + 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; + } - 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; + if (get_mode_modulo_shift(a->mode) != 0) { + temp_val = alloca(sc_get_buffer_length()); - 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); + 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_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) -{ - static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL }; - - const char *str; - char tv_buf[100]; - const tarval_mode_info *mode_info; - const char *prefix, *suffix; - - ANNOUNCE(); - - mode_info = tv->mode->tv_priv; - if (! mode_info) - mode_info = &default_info; - prefix = mode_info->mode_prefix ? mode_info->mode_prefix : ""; - suffix = mode_info->mode_suffix ? mode_info->mode_suffix : ""; - - switch (get_mode_sort(tv->mode)) - { - case irms_int_number: - case irms_character: - switch (mode_info->mode_output) { - - case TVO_DECIMAL: - str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC); - break; - - case TVO_OCTAL: - str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT); - break; - - case TVO_HEX: - case TVO_NATIVE: - default: - str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX); - break; - } - return snprintf(buf, len, "%s%s%s", prefix, str, suffix); - - case irms_float_number: - 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 == 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"); - - case irms_internal_boolean: - switch (mode_info->mode_output) { - - case TVO_DECIMAL: - case TVO_OCTAL: - case TVO_HEX: - case TVO_BINARY: - return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix); - - case TVO_NATIVE: - default: - return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix); - } - - case irms_control_flow: - case irms_memory: - case irms_auxiliary: - return snprintf(buf, len, ""); - } - - return 0; +int tarval_snprintf(char *buf, size_t len, tarval *tv) { + static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL }; + + const char *str; + char tv_buf[100]; + const tarval_mode_info *mode_info; + const char *prefix, *suffix; + + mode_info = tv->mode->tv_priv; + if (! mode_info) + mode_info = &default_info; + prefix = mode_info->mode_prefix ? mode_info->mode_prefix : ""; + suffix = mode_info->mode_suffix ? mode_info->mode_suffix : ""; + + switch (get_mode_sort(tv->mode)) { + case irms_reference: + if (tv == tv->mode->null) return snprintf(buf, len, "NULL"); + /* FALLTHROUGH */ + case irms_int_number: + switch (mode_info->mode_output) { + + case TVO_DECIMAL: + str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC, mode_is_signed(tv->mode)); + break; + + case TVO_OCTAL: + str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0); + break; + + case TVO_NATIVE: + prefix = "0x"; + case TVO_HEX: + default: + str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0); + break; + } + return snprintf(buf, len, "%s%s%s", prefix, str, suffix); + + case irms_float_number: + 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_internal_boolean: + switch (mode_info->mode_output) { + + case TVO_DECIMAL: + case TVO_OCTAL: + case TVO_HEX: + case TVO_BINARY: + return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix); + + case TVO_NATIVE: + default: + return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix); + } + + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + if (tv == tarval_bad) + return snprintf(buf, len, ""); + if (tv == tarval_undefined) + return snprintf(buf, len, ""); + if (tv == tarval_unreachable) + return snprintf(buf, len, ""); + if (tv == tarval_reachable) + return snprintf(buf, len, ""); + return snprintf(buf, len, ""); + } + + return 0; } - /** * Output of tarvals to stdio. */ int tarval_printf(tarval *tv) { - char buf[1024]; - int res; + char buf[1024]; + int res; - res = tarval_snprintf(buf, sizeof(buf), tv); - assert(res < sizeof(buf) && "buffer to small for tarval_snprintf"); - printf(buf); - return res; + res = tarval_snprintf(buf, sizeof(buf), tv); + assert(res < (int) sizeof(buf) && "buffer to small for tarval_snprintf"); + printf("%s", buf); + return res; } +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 = XMALLOCN(char, n + 1); + unsigned char byte; -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 = 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'; - } + 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'; + res[n] = '\0'; - return res; + return res; } /* * access to the bitpattern */ -unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) -{ - switch (get_mode_sort(tv->mode)) { - case irms_int_number: - case irms_character: - return sc_sub_bits(tv->value, tv->length, byte_ofs); - - case irms_float_number: - return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs); - - default: - return 0; - } +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); + case irma_ieee754: + return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs); + default: + panic("get_tarval_sub_bits(): arithmetic mode not supported"); + } } /* @@ -1605,12 +1559,11 @@ unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) * * Returns zero on success. */ -int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo) -{ - assert(mode); +int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo) { + assert(mode); - mode->tv_priv = modeinfo; - return 0; + mode->tv_priv = modeinfo; + return 0; } /* @@ -1618,123 +1571,212 @@ int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modein * * This functions returns the mode info of a given mode. */ -const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) -{ - assert(mode); +const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) { + assert(mode); - return mode->tv_priv; + return mode->tv_priv; } /* - * 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 + * Returns non-zero if a given (integer) tarval has only one single bit + * set. */ -tarval_classification_t classify_tarval(tarval *tv) -{ - ANNOUNCE(); - if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER; +int tarval_is_single_bit(tarval *tv) { + int i, l; + int bits; + + if (!tv || tv == tarval_bad) return 0; + if (! mode_is_int(tv->mode)) return 0; + + l = get_mode_size_bytes(tv->mode); + for (bits = 0, i = l - 1; i >= 0; --i) { + unsigned char v = get_tarval_sub_bits(tv, (unsigned)i); + + /* check for more than one bit in these */ + if (v) { + if (v & (v-1)) + return 0; + if (++bits > 1) + return 0; + } + } + return bits; +} - 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; +/* + * 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) { + assert(get_mode_arithmetic(tv->mode) == irma_ieee754); + return fc_zero_mantissa(tv->value); +} - return TV_CLASSIFY_OTHER; +/* Returns the exponent of a floating point IEEE-754 tarval. */ +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) { + 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) { + 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. */ void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) { - int_overflow_mode = ov_mode; + int_overflow_mode = ov_mode; } -/** - * Get the overflow mode for integer operations. - */ +/* Get the overflow mode for integer operations. */ tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) { - return int_overflow_mode; + return int_overflow_mode; +} + +/* Enable/Disable floating point constant folding. */ +void tarval_enable_fp_ops(int enable) { + no_float = !enable; +} + +int tarval_fp_ops_enabled(void) { + return !no_float; } /** * default mode_info for output as HEX */ static const tarval_mode_info hex_output = { - TVO_HEX, - "0x", - NULL, + TVO_HEX, + "0x", + NULL, }; -/** - * default mode_info for output as reference - */ -static const tarval_mode_info reference_output = { - TVO_NATIVE, - "&(", - ")", -}; - - /* * 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); +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(cmp_tv, N_CONSTANTS); + values = new_set(memcmp, N_CONSTANTS); + /* 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) -{ - ANNOUNCE(); - - tarval_bad->mode = mode_BAD; - tarval_undefined->mode = mode_ANY; - tarval_b_true->mode = mode_b; - tarval_b_false->mode = mode_b; - tarval_P_void->mode = mode_P; - - /* - * assign output modes that are compatible with the - * old implementation: Hex 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); +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_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_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 + * old implementation: 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, &hex_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; + finish_strcalc(); + finish_fltcalc(); + del_set(tarvals); tarvals = NULL; + del_set(values); values = NULL; +} + +int (is_tarval)(const void *thing) { + return _is_tarval(thing); } /****************************************************************************