X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=083e6303f7c2d67da842419ed60b6a893199af00;hb=b0d9cc1ccc75a33411f6e24d92eb6c6536d2281c;hp=512a1e50cb7c49af38772a37aed36a846b02acfc;hpb=75ec67cbebc8aa289505427706cf5d9b3061d5d0;p=libfirm diff --git a/ir/tv/tv.c b/ir/tv/tv.c index 512a1e50c..083e6303f 100644 --- a/ir/tv/tv.c +++ b/ir/tv/tv.c @@ -158,6 +158,29 @@ static int hash_val(const void *value, unsigned int length) { return hash; } +static int cmp_tv(const void *p1, const void *p2, size_t n) { + const tarval *tv1 = p1; + const tarval *tv2 = p2; + (void) n; + + assert(tv1->kind == k_tarval); + assert(tv2->kind == k_tarval); + if(tv1->mode < tv2->mode) + return -1; + if(tv1->mode > tv2->mode) + return 1; + if(tv1->length < tv2->length) + return -1; + if(tv1->length > tv2->length) + return 1; + if(tv1->value < tv2->value) + return -1; + if(tv1->value > tv2->value) + return 1; + + return 0; +} + /** finds tarval with value/mode or creates new tarval */ static tarval *get_tarval(const void *value, int length, ir_mode *mode) { tarval tv; @@ -256,12 +279,14 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) /* * public variables declared in tv.h */ -static tarval reserved_tv[4]; +static tarval reserved_tv[6]; -tarval *tarval_bad = &reserved_tv[0]; -tarval *tarval_undefined = &reserved_tv[1]; -tarval *tarval_b_false = &reserved_tv[2]; -tarval *tarval_b_true = &reserved_tv[3]; +tarval *tarval_b_false = &reserved_tv[0]; +tarval *tarval_b_true = &reserved_tv[1]; +tarval *tarval_bad = &reserved_tv[2]; +tarval *tarval_undefined = &reserved_tv[3]; +tarval *tarval_reachable = &reserved_tv[4]; +tarval *tarval_unreachable = &reserved_tv[5]; /* * public functions declared in tv.h @@ -285,8 +310,10 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) case irms_internal_boolean: /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */ - if (strcasecmp(str, "true")) return tarval_b_true; - else if (strcasecmp(str, "false")) return tarval_b_true; + if (strcasecmp(str, "true")) + return tarval_b_true; + else if (strcasecmp(str, "false")) + return tarval_b_true; else /* XXX This is C semantics */ return atoi(str) ? tarval_b_true : tarval_b_false; @@ -437,6 +464,14 @@ tarval *(get_tarval_b_true)(void) { return _get_tarval_b_true(); } +tarval *(get_tarval_reachable)(void) { + return _get_tarval_reachable(); +} + +tarval *(get_tarval_unreachable)(void) { + return _get_tarval_unreachable(); +} + tarval *get_tarval_max(ir_mode *mode) { assert(mode); @@ -611,6 +646,14 @@ tarval *get_tarval_all_one(ir_mode *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); @@ -864,7 +907,8 @@ tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) { assert(src); assert(dst_mode); - if (src->mode == dst_mode) return src; + if (src->mode == dst_mode) + return src; if (get_mode_n_vector_elems(src->mode) > 1) { /* vector arithmetic not implemented yet */ @@ -906,7 +950,7 @@ tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) { res = fc_rnd(src->value, NULL); break; default: - assert(0); + panic("Unsupported float to int conversion mode in tarval_convert_to()"); break; } buffer = alloca(sc_get_buffer_length()); @@ -1055,67 +1099,125 @@ tarval *tarval_neg(tarval *a) { * addition */ tarval *tarval_add(tarval *a, tarval *b) { - char *buffer; + tarval *res; + char *buffer; + ir_mode *dst_mode, *src_mode = NULL; 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; } + if (mode_is_reference(a->mode)) { + src_mode = a->mode; + dst_mode = find_unsigned_mode(a->mode); + + if (dst_mode == NULL) + return tarval_bad; + + a = tarval_convert_to(a, dst_mode); + b = tarval_convert_to(b, dst_mode); + } + if (mode_is_reference(b->mode)) { + src_mode = b->mode; + dst_mode = find_unsigned_mode(b->mode); + + if (dst_mode == 0) + return tarval_bad; + + a = tarval_convert_to(a, dst_mode); + b = tarval_convert_to(b, dst_mode); + } + + assert(a->mode == b->mode); + switch (get_mode_sort(a->mode)) { 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); + res = get_tarval_overflow(buffer, a->length, a->mode); + break; 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); + res = get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + break; default: return tarval_bad; } + if (src_mode != NULL) + return tarval_convert_to(res, src_mode); + return res; } /* * subtraction */ tarval *tarval_sub(tarval *a, tarval *b) { - char *buffer; + tarval *res; + char *buffer; + ir_mode *dst_mode, *src_mode = NULL; 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; } + if (mode_is_reference(a->mode)) { + src_mode = a->mode; + dst_mode = find_unsigned_mode(a->mode); + + if (dst_mode == NULL) + return tarval_bad; + + a = tarval_convert_to(a, dst_mode); + b = tarval_convert_to(b, dst_mode); + } + if (mode_is_reference(b->mode)) { + src_mode = b->mode; + dst_mode = find_unsigned_mode(b->mode); + + if (dst_mode == 0) + return tarval_bad; + + a = tarval_convert_to(a, dst_mode); + b = tarval_convert_to(b, dst_mode); + } + + assert(a->mode == b->mode); + switch (get_mode_sort(a->mode)) { 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); + res = get_tarval_overflow(buffer, a->length, a->mode); + break; 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); + res = get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); + break; default: return tarval_bad; } + if (src_mode != NULL) + return tarval_convert_to(res, src_mode); + return res; } /* @@ -1308,7 +1410,7 @@ tarval *tarval_and(tarval *a, tarval *b) { /* * bitwise or */ -tarval *tarval_or (tarval *a, tarval *b) { +tarval *tarval_or(tarval *a, tarval *b) { assert(a); assert(b); assert(a->mode == b->mode); @@ -1435,9 +1537,9 @@ tarval *tarval_shrs(tarval *a, tarval *b) { } /* - * bitwise rotation + * bitwise rotation to left */ -tarval *tarval_rot(tarval *a, tarval *b) { +tarval *tarval_rotl(tarval *a, tarval *b) { char *temp_val = NULL; assert(a); @@ -1457,7 +1559,7 @@ tarval *tarval_rot(tarval *a, tarval *b) { } else temp_val = (char*)b->value; - sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL); + sc_rotl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL); return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode); } @@ -1465,6 +1567,7 @@ tarval *tarval_rot(tarval *a, tarval *b) { * carry flag of the last operation */ int tarval_carry(void) { + panic("tarval_carry() requetsed: not implemented on all operations"); return sc_had_carry(); } @@ -1540,7 +1643,15 @@ int tarval_snprintf(char *buf, size_t len, tarval *tv) { case irms_control_flow: case irms_memory: case irms_auxiliary: - return snprintf(buf, len, ""); + 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; @@ -1658,6 +1769,30 @@ int tarval_ieee754_get_exponent(tarval *tv) { 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) { + char exp_size, mant_size; + switch (get_mode_size_bits(mode)) { + case 32: + exp_size = 8; mant_size = 23; + break; + case 64: + exp_size = 11; mant_size = 52; + break; + case 80: + case 96: + exp_size = 15; mant_size = 64; + break; + default: + panic("Unsupported mode in tarval_ieee754_can_conv_lossless()"); + return 0; + } + return fc_can_lossless_conv_to(tv->value, exp_size, mant_size); +} + /* Set the immediate precision for IEEE-754 results. */ unsigned tarval_ieee754_set_immediate_precision(unsigned bits) { return fc_set_immediate_precision(bits); @@ -1729,11 +1864,15 @@ static const tarval_mode_info hex_output = { * Initialization of the tarval module: called before init_mode() */ void init_tarval_1(long null_value) { + /* if these assertion fail, tarval_is_constant() will follow ... */ + assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!"); + assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!"); + _null_value = null_value; /* initialize the sets holding the tarvals with a comparison function and * an initial size, which is the expected number of constants */ - tarvals = new_set(memcmp, N_CONSTANTS); + tarvals = new_set(cmp_tv, N_CONSTANTS); values = new_set(memcmp, N_CONSTANTS); /* init strcalc with precision of 68 to support floating point values with 64 * bit mantissa (needs extra bits for rounding and overflow) */ @@ -1745,21 +1884,29 @@ void init_tarval_1(long null_value) { * Initialization of the tarval module: called after init_mode() */ void init_tarval_2(void) { - tarval_bad->kind = k_tarval; - tarval_bad->mode = mode_BAD; - tarval_bad->value = INT_TO_PTR(resid_tarval_bad); + tarval_bad->kind = k_tarval; + tarval_bad->mode = mode_BAD; + tarval_bad->value = INT_TO_PTR(resid_tarval_bad); - tarval_undefined->kind = k_tarval; - tarval_undefined->mode = mode_ANY; - tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined); + tarval_undefined->kind = k_tarval; + tarval_undefined->mode = mode_ANY; + tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined); - tarval_b_true->kind = k_tarval; - tarval_b_true->mode = mode_b; - tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true); + tarval_b_true->kind = k_tarval; + tarval_b_true->mode = mode_b; + tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true); - tarval_b_false->kind = k_tarval; - tarval_b_false->mode = mode_b; - tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false); + tarval_b_false->kind = k_tarval; + tarval_b_false->mode = mode_b; + tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false); + + tarval_unreachable->kind = k_tarval; + tarval_unreachable->mode = mode_X; + tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable); + + tarval_reachable->kind = k_tarval; + tarval_reachable->mode = mode_X; + tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable); /* * assign output modes that are compatible with the @@ -1784,6 +1931,10 @@ void finish_tarval(void) { del_set(values); values = NULL; } +int (is_tarval)(const void *thing) { + return _is_tarval(thing); +} + /**************************************************************************** * end of tv.c ****************************************************************************/