X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=55573f954036d78c6fb226910016e638b8e9eb2a;hb=7c4e33eb7648d9e1cc7efcffc8682a2f27a570a3;hp=2daab3ace6602a30b4e2a0a4dd730490951fe152;hpb=8cc52245e109070a5e9094803f74cc6432a44b1a;p=libfirm diff --git a/ir/tv/tv.c b/ir/tv/tv.c index 2daab3ace..55573f954 100644 --- a/ir/tv/tv.c +++ b/ir/tv/tv.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -168,7 +168,12 @@ static tarval *get_tarval(const void *value, int length, ir_mode *mode) { if (length > 0) { /* if there already is such a value, it is returned, else value * is copied into the set */ - tv.value = INSERT_VALUE(value, length); + char *temp = alloca(length); + memcpy(temp, value, length); + if (get_mode_arithmetic(mode) == irma_twos_complement) { + sign_extend(temp, mode); + } + tv.value = INSERT_VALUE(temp, length); } else { tv.value = value; } @@ -182,21 +187,30 @@ 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) { + char *temp; + switch (get_mode_sort(mode)) { + case irms_reference: + /* addresses always wrap around */ + temp = alloca(sc_get_buffer_length()); + memcpy(temp, value, sc_get_buffer_length()); + sc_truncate(get_mode_size_bits(mode), temp); + /* the sc_ module expects that all bits are set ... */ + sign_extend(temp, mode); + return get_tarval(temp, length, mode); + case irms_int_number: if (sc_comp(value, get_mode_max(mode)->value) == 1) { switch (GET_OVERFLOW_MODE()) { case TV_OVERFLOW_SATURATE: return get_mode_max(mode); case TV_OVERFLOW_WRAP: - { - char *temp = alloca(sc_get_buffer_length()); - sc_val_from_ulong(-1, temp); - sc_and(temp, value, temp); - /* the sc_ module expects that all bits are set ... */ - sign_extend(temp, mode); - return get_tarval(temp, length, mode); - } + temp = alloca(sc_get_buffer_length()); + memcpy(temp, value, sc_get_buffer_length()); + sc_truncate(get_mode_size_bits(mode), temp); + /* the sc_ module expects that all bits are set ... */ + sign_extend(temp, mode); + return get_tarval(temp, length, mode); case TV_OVERFLOW_BAD: return tarval_bad; default: @@ -209,8 +223,8 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) return get_mode_min(mode); case TV_OVERFLOW_WRAP: { char *temp = alloca(sc_get_buffer_length()); - sc_val_from_ulong(-1, temp); - sc_and(temp, value, temp); + memcpy(temp, value, sc_get_buffer_length()); + sc_truncate(get_mode_size_bits(mode), temp); return get_tarval(temp, length, mode); } case TV_OVERFLOW_BAD: @@ -223,10 +237,12 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) case irms_float_number: if (SWITCH_NOINFINITY && fc_is_inf(value)) { - return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode); + /* clip infinity to maximum value */ + return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode); } if (SWITCH_NODENORMALS && fc_is_subnormal(value)) { + /* clip denormals to zero */ return get_mode_null(mode); } break; @@ -284,8 +300,11 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) fc_val_from_str(str, len, 11, 52, NULL); break; case 80: + case 96: fc_val_from_str(str, len, 15, 64, NULL); break; + default: + panic("Unsupported mode in new_tarval_from_str()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); @@ -306,7 +325,7 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) tarval *new_tarval_from_long(long l, ir_mode *mode) { assert(mode); - switch(get_mode_sort(mode)) { + switch (get_mode_sort(mode)) { case irms_internal_boolean: /* XXX C semantics ! */ return l ? tarval_b_true : tarval_b_false ; @@ -360,8 +379,11 @@ tarval *new_tarval_from_double(long double d, ir_mode *mode) { fc_val_from_ieee754(d, 11, 52, NULL); break; case 80: + case 96: fc_val_from_ieee754(d, 15, 64, NULL); break; + default: + panic("Unsupported mode in new_tarval_from_double()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); } @@ -424,7 +446,6 @@ tarval *get_tarval_max(ir_mode *mode) { } switch(get_mode_sort(mode)) { - case irms_reference: case irms_control_flow: case irms_memory: case irms_auxiliary: @@ -443,14 +464,18 @@ tarval *get_tarval_max(ir_mode *mode) { fc_get_max(11, 52, NULL); break; case 80: + case 96: fc_get_max(15, 64, NULL); break; + default: + panic("Unsupported mode in get_tarval_max()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - case irms_int_number: - sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); + case irms_reference: + case irms_int_number: + sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL); + return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); } return tarval_bad; } @@ -464,7 +489,6 @@ tarval *get_tarval_min(ir_mode *mode) { } switch(get_mode_sort(mode)) { - case irms_reference: case irms_control_flow: case irms_memory: case irms_auxiliary: @@ -483,20 +507,24 @@ tarval *get_tarval_min(ir_mode *mode) { fc_get_min(11, 52, NULL); break; case 80: + case 96: fc_get_min(15, 64, NULL); break; + default: + panic("Unsupported mode in get_tarval_min()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - case irms_int_number: - sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL); - return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); + case irms_reference: + case irms_int_number: + sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL); + return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); } return tarval_bad; } /** The bit pattern for the pointer NULL */ -static long _null_value; +static long _null_value = 0; tarval *get_tarval_null(ir_mode *mode) { assert(mode); @@ -510,13 +538,13 @@ tarval *get_tarval_null(ir_mode *mode) { case irms_control_flow: case irms_memory: case irms_auxiliary: - case irms_internal_boolean: assert(0); break; case irms_float_number: return new_tarval_from_double(0.0, mode); + case irms_internal_boolean: case irms_int_number: return new_tarval_from_long(0l, mode); @@ -531,6 +559,7 @@ tarval *get_tarval_one(ir_mode *mode) { if (get_mode_n_vector_elems(mode) > 1) { /* vector arithmetic not implemented yet */ + assert(0); return tarval_bad; } @@ -538,26 +567,28 @@ tarval *get_tarval_one(ir_mode *mode) { case irms_control_flow: case irms_memory: case irms_auxiliary: - case irms_internal_boolean: - case irms_reference: assert(0); break; + 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); - break; } return tarval_bad; } -tarval *get_tarval_minus_one(ir_mode *mode) { +tarval *get_tarval_all_one(ir_mode *mode) { assert(mode); if (get_mode_n_vector_elems(mode) > 1) { /* vector arithmetic not implemented yet */ + assert(0); return tarval_bad; } @@ -565,16 +596,45 @@ tarval *get_tarval_minus_one(ir_mode *mode) { case irms_control_flow: case irms_memory: case irms_auxiliary: + assert(0); + return tarval_bad; + + 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; +} + +tarval *get_tarval_minus_one(ir_mode *mode) { + assert(mode); + + if (get_mode_n_vector_elems(mode) > 1) { + /* vector arithmetic not implemented yet */ + return tarval_bad; + } + + switch(get_mode_sort(mode)) { + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + case irms_internal_boolean: assert(0); break; + 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 mode_is_signed(mode) ? new_tarval_from_long(-1l, mode) : tarval_bad; + return new_tarval_from_long(-1l, mode); } return tarval_bad; } @@ -596,8 +656,11 @@ tarval *get_tarval_nan(ir_mode *mode) { fc_get_qnan(11, 52, NULL); break; case 80: + case 96: fc_get_qnan(15, 64, NULL); break; + default: + panic("Unsupported mode in get_tarval_nan()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); } else { @@ -623,8 +686,11 @@ tarval *get_tarval_plus_inf(ir_mode *mode) { fc_get_plusinf(11, 52, NULL); break; case 80: + case 96: fc_get_plusinf(15, 64, NULL); break; + default: + panic("Unsupported mode in get_tarval_plus_inf()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); } else { @@ -650,8 +716,11 @@ tarval *get_tarval_minus_inf(ir_mode *mode) { fc_get_minusinf(11, 52, NULL); break; case 80: + case 96: fc_get_minusinf(15, 64, NULL); break; + default: + panic("Unsupported mode in get_tarval_minus_inf()"); } return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); } else { @@ -683,7 +752,7 @@ int tarval_is_negative(tarval *a) { return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0; case irms_float_number: - return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0; + return fc_is_negative(a->value); default: assert(0 && "not implemented"); @@ -695,18 +764,33 @@ int tarval_is_negative(tarval *a) { * test if null, 1 means 'yes' */ int tarval_is_null(tarval *a) { - ir_mode *m = get_tarval_mode(a); - - return a == get_tarval_null(m); + return + a != tarval_bad && + a == get_mode_null(get_tarval_mode(a)); } /* * test if one, 1 means 'yes' */ int tarval_is_one(tarval *a) { - ir_mode *m = get_tarval_mode(a); + return + a != tarval_bad && + a == get_mode_one(get_tarval_mode(a)); +} - return a == get_tarval_one(m); +int tarval_is_all_one(tarval *tv) { + return + tv != tarval_bad && + tv == get_mode_all_one(get_tarval_mode(tv)); +} + +/* + * test if one, 1 means 'yes' + */ +int tarval_is_minus_one(tarval *a) { + return + a != tarval_bad && + a == get_mode_minus_one(get_tarval_mode(a)); } /* @@ -737,7 +821,6 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { case irms_control_flow: case irms_memory: case irms_auxiliary: - case irms_reference: if (a == b) return pn_Cmp_Eq; return pn_Cmp_False; @@ -756,6 +839,7 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { 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; @@ -772,13 +856,14 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { /* * convert to other mode */ -tarval *tarval_convert_to(tarval *src, ir_mode *m) { +tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) { char *buffer; + fp_value *res; assert(src); - assert(m); + assert(dst_mode); - if (src->mode == m) return src; + if (src->mode == dst_mode) return src; if (get_mode_n_vector_elems(src->mode) > 1) { /* vector arithmetic not implemented yet */ @@ -793,9 +878,9 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { /* cast float to something */ case irms_float_number: - switch (get_mode_sort(m)) { + switch (get_mode_sort(dst_mode)) { case irms_float_number: - switch (get_mode_size_bits(m)) { + switch (get_mode_size_bits(dst_mode)) { case 32: fc_cast(src->value, 8, 23, NULL); break; @@ -803,30 +888,30 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { fc_cast(src->value, 11, 52, NULL); break; case 80: + case 96: fc_cast(src->value, 15, 64, NULL); break; default: - break; + panic("Unsupported mode in tarval_convert_to()"); } - return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m); + return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode); case irms_int_number: switch (GET_FLOAT_TO_INT_MODE()) { case TRUNCATE: - fc_int(src->value, NULL); + res = fc_int(src->value, NULL); break; case ROUND: - fc_rnd(src->value, NULL); + res = fc_rnd(src->value, NULL); break; default: assert(0); break; } - /* FIXME: floating point unit can't produce a value in integer - * representation - * an intermediate representation is needed here first. */ - /* return get_tarval(); */ - return tarval_bad; + buffer = alloca(sc_get_buffer_length()); + if (! fc_flt2int(res, buffer, dst_mode)) + return tarval_bad; + return get_tarval(buffer, sc_get_buffer_length(), dst_mode); default: /* the rest can't be converted */ @@ -836,12 +921,14 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { /* cast int/characters to something */ case irms_int_number: - switch (get_mode_sort(m)) { + switch (get_mode_sort(dst_mode)) { + + case irms_reference: case irms_int_number: buffer = alloca(sc_get_buffer_length()); memcpy(buffer, src->value, sc_get_buffer_length()); - sign_extend(buffer, m); - return get_tarval_overflow(buffer, src->length, m); + sign_extend(buffer, dst_mode); + return get_tarval_overflow(buffer, src->length, dst_mode); case irms_internal_boolean: /* XXX C semantics */ @@ -858,7 +945,7 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { snprintf(buffer, 100, "%s", sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode))); buffer[100 - 1] = '\0'; - switch (get_mode_size_bits(m)) { + switch (get_mode_size_bits(dst_mode)) { case 32: fc_val_from_str(buffer, 0, 8, 23, NULL); break; @@ -866,16 +953,13 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { fc_val_from_str(buffer, 0, 11, 52, NULL); break; case 80: + case 96: fc_val_from_str(buffer, 0, 15, 64, NULL); break; + default: + panic("Unsupported mode in tarval_convert_to()"); } - 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; + return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode); default: break; @@ -883,27 +967,18 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { break; case irms_internal_boolean: - switch (get_mode_sort(m)) { - case irms_int_number: - if (src == tarval_b_true) return get_mode_one(m); - else return get_mode_null(m); - - default: - break; - } + /* beware: this is C semantic for the INTERNAL boolean mode */ + if (get_mode_sort(dst_mode) == irms_int_number) + return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode); break; case irms_reference: - switch(get_mode_sort(m)) { - case irms_int_number: + if (get_mode_sort(dst_mode) == irms_int_number) { buffer = alloca(sc_get_buffer_length()); memcpy(buffer, src->value, sc_get_buffer_length()); sign_extend(buffer, src->mode); - return get_tarval_overflow(buffer, src->length, m); - default: - break; + return get_tarval_overflow(buffer, src->length, dst_mode); } - break; } @@ -921,6 +996,7 @@ tarval *tarval_not(tarval *a) { /* 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); @@ -1136,6 +1212,33 @@ tarval *tarval_mod(tarval *a, tarval *b) { 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); + assert(b); + assert((a->mode == b->mode) && mode_is_int(a->mode)); + + if (get_mode_n_vector_elems(a->mode) > 1) { + /* vector arithmetic not implemented yet */ + return tarval_bad; + } + + + /* x/0 error */ + if (b == get_mode_null(b->mode)) return tarval_bad; + /* modes of a,b are equal */ + sc_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 */ @@ -1478,7 +1581,7 @@ char *get_tarval_bitpattern(tarval *tv) { unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) { switch (get_mode_arithmetic(tv->mode)) { case irma_twos_complement: - return sc_sub_bits(tv->value, tv->length, byte_ofs); + return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs); case irma_ieee754: return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs); default: @@ -1511,29 +1614,6 @@ const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) { return mode->tv_priv; } -/* - * Identifying tarvals values for algebraic simplifications. - * - * Returns: - * - TV_CLASSIFY_NULL for additive neutral or the NULL tarval for reference modes, - * - TV_CLASSIFY_ONE for multiplicative neutral, - * - TV_CLASSIFY_ALL_ONE for bitwise-and neutral - * - TV_CLASSIFY_OTHER else - */ -tarval_classification_t classify_tarval(tarval *tv) { - if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER; - - if (tv == get_mode_null(tv->mode)) - return TV_CLASSIFY_NULL; - else if (tv == get_mode_one(tv->mode)) - return TV_CLASSIFY_ONE; - else if ((get_mode_sort(tv->mode) == irms_int_number) - && (tv == new_tarval_from_long(-1, tv->mode))) - return TV_CLASSIFY_ALL_ONE; - - return TV_CLASSIFY_OTHER; -} - /* * Returns non-zero if a given (integer) tarval has only one single bit * set. @@ -1585,6 +1665,34 @@ unsigned tarval_ieee754_get_exact(void) { return fc_is_exact(); } +/* 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. */