X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=90d24bb7ad3bd40faa932986cb3544f0d5de6553;hb=464132f4d8840f7bb4228bfeef5484331bf50835;hp=7af7434e5bafb849e7a75004bef963059cf799d6;hpb=90f6fc11046608b9c6cad4f47b2804c290436876;p=libfirm diff --git a/ir/tv/tv.c b/ir/tv/tv.c index 7af7434e5..90d24bb7a 100644 --- a/ir/tv/tv.c +++ b/ir/tv/tv.c @@ -34,7 +34,9 @@ #ifdef HAVE_STRINGS_H #include /* strings.h also includes bsd only function strcasecmp */ #endif -#include +#ifdef HAVE_STDLIB_H +# include +#endif #ifdef HAVE_ALLOCA_H # include #endif @@ -44,12 +46,13 @@ #include "tv_t.h" #include "set.h" /* to store tarvals in */ -/* #include "tune.h" */ /* some constants */ #include "entity_t.h" /* needed to store pointers to entities */ #include "irmode_t.h" #include "irnode.h" /* defines boolean return values (pnc_number)*/ #include "strcalc.h" #include "fltcalc.h" +#include "irtools.h" +#include "firm_common.h" /** Size of hash tables. Should correspond to average number of distinct constant target values */ @@ -59,8 +62,11 @@ #define GET_OVERFLOW_MODE() int_overflow_mode /* unused, float to int doesn't work yet */ -#define TRUNCATE 1 -#define ROUND 2 +enum float_to_int_mode { + TRUNCATE, + ROUND +}; + #define GET_FLOAT_TO_INT_MODE() TRUNCATE #define SWITCH_NOINFINITY 0 @@ -132,7 +138,7 @@ INLINE static void tarval_verify(tarval *tv) static int hash_tv(tarval *tv) { - return ((unsigned int)tv->value ^ (unsigned int)tv->mode) + tv->length; + return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length; } static int hash_val(const void *value, unsigned int length) @@ -150,12 +156,13 @@ static int hash_val(const void *value, unsigned int length) return hash; } -/* finds tarval with value/mode or creates new tarval */ +/** finds tarval with value/mode or creates new tarval */ static tarval *get_tarval(const void *value, int length, ir_mode *mode) { tarval tv; - tv.mode = mode; + tv.kind = k_tarval; + tv.mode = mode; tv.length = length; if (length > 0) { /* if there already is such a value, it is returned, else value @@ -184,13 +191,8 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *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); + sc_val_from_ulong(-1, temp); + sc_and(temp, value, temp); return get_tarval(temp, length, mode); } case TV_OVERFLOW_BAD: @@ -206,13 +208,8 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *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); + sc_val_from_ulong(-1, temp); + sc_and(temp, value, temp); return get_tarval(temp, length, mode); } case TV_OVERFLOW_BAD: @@ -234,6 +231,7 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) return get_mode_null(mode); } break; + default: break; } @@ -244,13 +242,12 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) /* * public variables declared in tv.h */ -static tarval reserved_tv[5]; +static tarval reserved_tv[4]; tarval *tarval_bad = &reserved_tv[0]; tarval *tarval_undefined = &reserved_tv[1]; tarval *tarval_b_false = &reserved_tv[2]; tarval *tarval_b_true = &reserved_tv[3]; -tarval *tarval_P_void = &reserved_tv[4]; /* * public functions declared in tv.h @@ -296,13 +293,12 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); + case irms_reference: + /* same as integer modes */ case irms_int_number: case irms_character: - sc_val_from_str(str, len, NULL); + sc_val_from_str(str, len, NULL, mode); 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? */ @@ -315,7 +311,7 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) tarval *new_tarval_from_long(long l, ir_mode *mode) { ANNOUNCE(); - assert(mode && !((get_mode_sort(mode) == irms_memory)||(get_mode_sort(mode)==irms_control_flow)||(get_mode_sort(mode)==irms_auxiliary))); + assert(mode); switch(get_mode_sort(mode)) { @@ -323,6 +319,8 @@ tarval *new_tarval_from_long(long l, ir_mode *mode) /* XXX C semantics ! */ return l ? tarval_b_true : tarval_b_false ; + case irms_reference: + /* same as integer modes */ case irms_int_number: case irms_character: sc_val_from_long(l, NULL); @@ -331,11 +329,8 @@ tarval *new_tarval_from_long(long l, ir_mode *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); + assert(0 && "unsupported mode sort"); } return NULL; } @@ -343,8 +338,10 @@ tarval *new_tarval_from_long(long l, ir_mode *mode) /* 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 (get_mode_sort(tv->mode) != irms_int_number) return 0; + if (sort != irms_int_number && sort != irms_character) return 0; if (get_mode_size_bits(tv->mode) > sizeof(long)<<3) { @@ -408,21 +405,11 @@ long double get_tarval_double(tarval *tv) /* * Access routines for tarval fields ======================================== */ -ir_mode *get_tarval_mode (tarval *tv) /* get the mode of the tarval */ -{ - ANNOUNCE(); - assert(tv); - return tv->mode; -} -/* -void *get_tarval_link (tarval *tv) -{ - ANNOUNCE (); - assert (tv); - return (tv->link); +/* get the mode of the tarval */ +ir_mode *(get_tarval_mode)(const tarval *tv) { + return _get_tarval_mode(tv); } -*/ /* * Special value query functions ============================================ @@ -434,30 +421,20 @@ void *get_tarval_link (tarval *tv) * therefore the irmode functions should be prefered to the functions below. */ -tarval *get_tarval_bad(void) -{ - ANNOUNCE(); - return tarval_bad; +tarval *(get_tarval_bad)(void) { + return _get_tarval_bad(); } -tarval *get_tarval_undefined(void) -{ - ANNOUNCE(); - return tarval_undefined; -} -tarval *get_tarval_b_false(void) -{ - ANNOUNCE(); - return tarval_b_false; + +tarval *(get_tarval_undefined)(void) { + return _get_tarval_undefined(); } -tarval *get_tarval_b_true(void) -{ - ANNOUNCE(); - return tarval_b_true; + +tarval *(get_tarval_b_false)(void) { + return _get_tarval_b_false(); } -tarval *get_tarval_P_void(void) -{ - ANNOUNCE(); - return tarval_P_void; + +tarval *(get_tarval_b_true)(void) { + return _get_tarval_b_true(); } tarval *get_tarval_max(ir_mode *mode) @@ -550,6 +527,8 @@ tarval *get_tarval_min(ir_mode *mode) return tarval_bad; } +static long _null_value; + tarval *get_tarval_null(ir_mode *mode) { ANNOUNCE(); @@ -577,7 +556,7 @@ tarval *get_tarval_null(ir_mode *mode) return new_tarval_from_long(0l, mode); case irms_reference: - return tarval_P_void; + return new_tarval_from_long(_null_value, mode); } return tarval_bad; } @@ -613,6 +592,36 @@ tarval *get_tarval_one(ir_mode *mode) 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(); @@ -644,7 +653,7 @@ tarval *get_tarval_nan(ir_mode *mode) } } -tarval *get_tarval_inf(ir_mode *mode) +tarval *get_tarval_plus_inf(ir_mode *mode) { ANNOUNCE(); assert(mode); @@ -675,6 +684,37 @@ tarval *get_tarval_inf(ir_mode *mode) } } +tarval *get_tarval_minus_inf(ir_mode *mode) +{ + ANNOUNCE(); + assert(mode); + + if (get_mode_n_vector_elems(mode) > 1) { + /* vector arithmetic not implemented yet */ + return tarval_bad; + } + + if (get_mode_sort(mode) == irms_float_number) { + 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; + } +} + /* * Arithmethic operations on tarvals ======================================== */ @@ -732,16 +772,22 @@ int tarval_is_one(tarval *a) /* * comparison */ -pnc_number tarval_cmp(tarval *a, tarval *b) +pn_Cmp tarval_cmp(tarval *a, tarval *b) { ANNOUNCE(); assert(a); assert(b); - if (a == tarval_bad || b == tarval_bad) assert(0 && "Comparison with tarval_bad"); - if (a == tarval_undefined || b == tarval_undefined) return False; - if (a == b) return Eq; - if (a->mode != b->mode) return False; + 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 */ @@ -755,24 +801,34 @@ pnc_number tarval_cmp(tarval *a, tarval *b) case irms_memory: case irms_auxiliary: case irms_reference: - return False; + 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 Lt; - case 0: assert(0 && "different tarvals compare equal"); return Eq; - case 1: return Gt; - case 2: return Uo; - default: return False; + case -1: return pn_Cmp_Lt; + case 0: return pn_Cmp_Eq; + case 1: return pn_Cmp_Gt; + case 2: return pn_Cmp_Uo; + default: return pn_Cmp_False; } case irms_int_number: case irms_character: - return (sc_comp(a->value, b->value)==1)?(Gt):(Lt); + if (a == b) + return pn_Cmp_Eq; + return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt; case irms_internal_boolean: - return (a == tarval_b_true)?(Gt):(Lt); + if (a == b) + return pn_Cmp_Eq; + return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt; } - return False; + return pn_Cmp_False; } /* @@ -830,9 +886,10 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) fc_rnd(src->value, NULL); break; default: + assert(0); break; } - /* XXX floating point unit can't produce a value in integer + /* FIXME: floating point unit can't produce a value in integer * representation * an intermediate representation is needed here first. */ /* return get_tarval(); */ @@ -879,6 +936,12 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) } 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; + default: break; } @@ -914,7 +977,6 @@ tarval *tarval_not(tarval *a) ANNOUNCE(); assert(a); - assert(mode_is_int(a->mode)); /* bitwise negation is only allowed for integer */ /* works for vector mode without changes */ @@ -925,7 +987,15 @@ tarval *tarval_not(tarval *a) 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; } } @@ -1440,21 +1510,21 @@ int tarval_snprintf(char *buf, size_t len, tarval *tv) 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'; + if (tv == tv->mode->null) 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; } - return tv->length; - } else - return snprintf(buf, len, "void"); + return snprintf(buf, len, "void"); case irms_internal_boolean: switch (mode_info->mode_output) { @@ -1550,7 +1620,7 @@ int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modein /* * Returns the output options of one mode. * - * This functions returns the modinfo of a given mode. + * This functions returns the mode info of a given mode. */ const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) { @@ -1563,7 +1633,7 @@ const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) * Identifying tarvals values for algebraic simplifications. * * Returns: - * - TV_CLASSIFY_NULL for additive neutral, + * - 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 @@ -1584,7 +1654,33 @@ tarval_classification_t classify_tarval(tarval *tv) return TV_CLASSIFY_OTHER; } -/** +/* + * Returns non-zero if a given (integer) tarval has only one single bit + * set. + */ +int is_single_bit_tarval(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; +} + +/* * Sets the overflow mode for integer operations. */ void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) { @@ -1616,13 +1712,14 @@ static const tarval_mode_info reference_output = { ")", }; - /* * Initialization of the tarval module: called before init_mode() */ -void init_tarval_1(void) +void init_tarval_1(long null_value) { ANNOUNCE(); + _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); @@ -1640,11 +1737,17 @@ void init_tarval_2(void) { ANNOUNCE(); + tarval_bad->kind = k_tarval; tarval_bad->mode = mode_BAD; + + tarval_undefined->kind = k_tarval; tarval_undefined->mode = mode_ANY; + + tarval_b_true->kind = k_tarval; tarval_b_true->mode = mode_b; + + tarval_b_false->kind = k_tarval; tarval_b_false->mode = mode_b; - tarval_P_void->mode = mode_P; /* * assign output modes that are compatible with the