X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=e0b51c18b735148b618076a36f1d4be70cb81014;hb=45ecc187cee7107c83c1f9618a1e1e586df73644;hp=7c102c83d39c7c7dcf5e9587022136a713f2f31d;hpb=192d953cd17836367373b15e678bc510f4bca045;p=libfirm diff --git a/ir/tv/tv.c b/ir/tv/tv.c index 7c102c83d..e0b51c18b 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. * @@ -94,16 +94,29 @@ enum float_to_int_mode { #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__) -/**************************************************************************** - * private variables - ****************************************************************************/ -static struct set *tarvals = NULL; /* container for tarval structs */ -static struct set *values = NULL; /* container for values */ +/** A set containing all existing tarvals. */ +static struct set *tarvals = NULL; +/** A set containing all existing values. */ +static struct set *values = NULL; + +/** The 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 ****************************************************************************/ @@ -114,10 +127,9 @@ 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); + panic("%s:%d: Invalid tarval: mode: %F\n value: [%p]", file, line, tv->mode, tv->value); else - printf("%s:%d: Invalid tarval (null)", file, line); - assert(0); + panic("%s:%d: Invalid tarval (null)", file, line); } #ifdef __GNUC__ INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused)); @@ -134,8 +146,6 @@ INLINE static void tarval_verify(tarval *tv) if (!FIND_TARVAL(tv)) fail_verify(tv); if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv); - - return; } #endif /* NDEBUG */ @@ -158,6 +168,29 @@ 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; @@ -168,7 +201,12 @@ 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; } @@ -188,8 +226,8 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) case irms_reference: /* addresses always wrap around */ 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); /* the sc_ module expects that all bits are set ... */ sign_extend(temp, mode); return get_tarval(temp, length, mode); @@ -201,8 +239,8 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode) return get_mode_max(mode); case TV_OVERFLOW_WRAP: 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); /* the sc_ module expects that all bits are set ... */ sign_extend(temp, mode); return get_tarval(temp, length, mode); @@ -218,8 +256,8 @@ 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: @@ -232,10 +270,12 @@ 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; @@ -249,12 +289,31 @@ 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_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]; -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]; +/** + * 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 @@ -265,6 +324,8 @@ tarval *tarval_b_true = &reserved_tv[3]; */ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) { + const ieee_descriptor_t *desc; + assert(str); assert(len); assert(mode); @@ -273,29 +334,21 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) case irms_control_flow: case irms_memory: case irms_auxiliary: - assert(0); - break; + panic("Unsupported tarval creation with mode %F", mode); case irms_internal_boolean: /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */ - if (strcasecmp(str, "true")) return tarval_b_true; - else if (strcasecmp(str, "false")) return tarval_b_true; + if (strcasecmp(str, "true")) + return tarval_b_true; + else if (strcasecmp(str, "false")) + return tarval_b_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; - } + 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: @@ -304,9 +357,7 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode) sc_val_from_str(str, len, NULL, mode); return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); } - - assert(0); /* can't be reached, can it? */ - return NULL; + panic("Unsupported tarval creation with mode %F", mode); } /* @@ -324,7 +375,6 @@ tarval *new_tarval_from_long(long l, ir_mode *mode) { /* same as integer modes */ case irms_int_number: sc_val_from_long(l, NULL); - sign_extend(sc_get_buffer(), mode); return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode); case irms_float_number: @@ -360,19 +410,11 @@ long get_tarval_long(tarval* tv) { } tarval *new_tarval_from_double(long double d, ir_mode *mode) { - assert(mode && (get_mode_sort(mode) == irms_float_number)); + const ieee_descriptor_t *desc; - switch (get_mode_size_bits(mode)) { - case 32: - fc_val_from_ieee754(d, 8, 23, NULL); - break; - case 64: - fc_val_from_ieee754(d, 11, 52, NULL); - break; - case 80: - fc_val_from_ieee754(d, 15, 64, NULL); - break; - } + assert(mode && (get_mode_sort(mode) == irms_float_number)); + desc = get_descriptor(mode); + fc_val_from_ieee754(d, desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); } @@ -425,36 +467,35 @@ 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); + 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)) { + switch (get_mode_sort(mode)) { case irms_control_flow: case irms_memory: case irms_auxiliary: - assert(0); - break; + panic("mode %F does not support maximum value", mode); case irms_internal_boolean: return tarval_b_true; case irms_float_number: - switch(get_mode_size_bits(mode)) { - case 32: - fc_get_max(8, 23, NULL); - break; - case 64: - fc_get_max(11, 52, NULL); - break; - case 80: - fc_get_max(15, 64, NULL); - break; - } + desc = get_descriptor(mode); + fc_get_max(desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); case irms_reference: @@ -466,35 +507,26 @@ tarval *get_tarval_max(ir_mode *mode) { } tarval *get_tarval_min(ir_mode *mode) { - assert(mode); + const ieee_descriptor_t *desc; + assert(mode); if (get_mode_n_vector_elems(mode) > 1) { /* vector arithmetic not implemented yet */ return tarval_bad; } - switch(get_mode_sort(mode)) { + switch (get_mode_sort(mode)) { case irms_control_flow: case irms_memory: case irms_auxiliary: - assert(0); - break; + panic("mode %F does not support minimum value", mode); case irms_internal_boolean: return tarval_b_false; case irms_float_number: - switch(get_mode_size_bits(mode)) { - case 32: - fc_get_min(8, 23, NULL); - break; - case 64: - fc_get_min(11, 52, NULL); - break; - case 80: - fc_get_min(15, 64, NULL); - break; - } + desc = get_descriptor(mode); + fc_get_min(desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); case irms_reference: @@ -516,17 +548,16 @@ tarval *get_tarval_null(ir_mode *mode) { return tarval_bad; } - switch(get_mode_sort(mode)) { + switch (get_mode_sort(mode)) { case irms_control_flow: case irms_memory: case irms_auxiliary: - case irms_internal_boolean: - assert(0); - break; + panic("mode %F does not support null value", mode); case irms_float_number: return new_tarval_from_double(0.0, mode); + case irms_internal_boolean: case irms_int_number: return new_tarval_from_long(0l, mode); @@ -539,46 +570,75 @@ tarval *get_tarval_null(ir_mode *mode) { tarval *get_tarval_one(ir_mode *mode) { assert(mode); - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); - switch(get_mode_sort(mode)) { + switch (get_mode_sort(mode)) { case irms_control_flow: case irms_memory: case irms_auxiliary: + panic("mode %F does not support one value", mode); + case irms_internal_boolean: - case irms_reference: - assert(0); - break; + return tarval_b_true; case irms_float_number: return new_tarval_from_double(1.0, mode); + case irms_reference: case irms_int_number: return new_tarval_from_long(1l, mode); - break; } return tarval_bad; } -tarval *get_tarval_minus_one(ir_mode *mode) { +tarval *get_tarval_all_one(ir_mode *mode) { assert(mode); - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); + + switch (get_mode_sort(mode)) { + case irms_control_flow: + case irms_memory: + case irms_auxiliary: + panic("mode %F does not support all-one value", mode); + + case irms_int_number: + case irms_internal_boolean: + case irms_reference: + return tarval_not(get_mode_null(mode)); + + + case irms_float_number: + return new_tarval_from_double(1.0, mode); } + return tarval_bad; +} + +int tarval_is_constant(tarval *tv) { + int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]); + + /* 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)) { + switch (get_mode_sort(mode)) { case irms_control_flow: case irms_memory: case irms_auxiliary: case irms_internal_boolean: + panic("mode %F does not support minus one value", mode); + case irms_reference: - assert(0); - break; + return tarval_bad; case irms_float_number: return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad; @@ -590,88 +650,49 @@ tarval *get_tarval_minus_one(ir_mode *mode) { } tarval *get_tarval_nan(ir_mode *mode) { - assert(mode); + const ieee_descriptor_t *desc; - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } + assert(mode); + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); if (get_mode_sort(mode) == irms_float_number) { - switch(get_mode_size_bits(mode)) { - case 32: - fc_get_qnan(8, 23, NULL); - break; - case 64: - fc_get_qnan(11, 52, NULL); - break; - case 80: - fc_get_qnan(15, 64, NULL); - break; - } + desc = get_descriptor(mode); + fc_get_qnan(desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - } else { - assert(0 && "tarval is not floating point"); - return tarval_bad; - } + } else + panic("mode %F does not support NaN value", mode); } tarval *get_tarval_plus_inf(ir_mode *mode) { assert(mode); - - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); if (get_mode_sort(mode) == irms_float_number) { - switch(get_mode_size_bits(mode)) { - case 32: - fc_get_plusinf(8, 23, NULL); - break; - case 64: - fc_get_plusinf(11, 52, NULL); - break; - case 80: - fc_get_plusinf(15, 64, NULL); - break; - } + const ieee_descriptor_t *desc = get_descriptor(mode); + fc_get_plusinf(desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - } else { - assert(0 && "tarval is not floating point"); - return tarval_bad; - } + } else + panic("mode %F does not support +inf value", mode); } tarval *get_tarval_minus_inf(ir_mode *mode) { assert(mode); - if (get_mode_n_vector_elems(mode) > 1) { - /* vector arithmetic not implemented yet */ - return tarval_bad; - } + if (get_mode_n_vector_elems(mode) > 1) + panic("vector arithmetic not implemented yet"); if (get_mode_sort(mode) == irms_float_number) { - switch(get_mode_size_bits(mode)) { - case 32: - fc_get_minusinf(8, 23, NULL); - break; - case 64: - fc_get_minusinf(11, 52, NULL); - break; - case 80: - fc_get_minusinf(15, 64, NULL); - break; - } + const ieee_descriptor_t *desc = get_descriptor(mode); + fc_get_minusinf(desc, NULL); return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode); - } else { - assert(0 && "tarval is not floating point"); - return tarval_bad; - } + } else + panic("mode %F does not support -inf value", mode); } /* - * Arithmethic operations on tarvals ======================================== + * Arithmetic operations on tarvals ======================================== */ /* @@ -680,11 +701,8 @@ tarval *get_tarval_minus_inf(ir_mode *mode) { int tarval_is_negative(tarval *a) { assert(a); - if (get_mode_n_vector_elems(a->mode) > 1) { - /* vector arithmetic not implemented yet */ - assert(0 && "tarval_is_negative is not allowed for vector modes"); - return 0; - } + if (get_mode_n_vector_elems(a->mode) > 1) + panic("vector arithmetic not implemented yet"); switch (get_mode_sort(a->mode)) { case irms_int_number: @@ -693,11 +711,10 @@ 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"); - return 0; + panic("mode %F does not support negation value", a->mode); } } @@ -705,18 +722,33 @@ 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)); +} + +int tarval_is_all_one(tarval *tv) { + return + tv != tarval_bad && + tv == get_mode_all_one(get_tarval_mode(tv)); +} - return a == get_tarval_one(m); +/* + * 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)); } /* @@ -727,7 +759,7 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { assert(b); if (a == tarval_bad || b == tarval_bad) { - assert(0 && "Comparison with tarval_bad"); + panic("Comparison with tarval_bad"); return pn_Cmp_False; } @@ -752,8 +784,9 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { return pn_Cmp_False; case irms_float_number: - if (no_float) - return pn_Cmp_False; + /* it should be safe to enable this even if other arithmetic is disabled */ + /*if (no_float) + return pn_Cmp_False;*/ /* * BEWARE: we cannot compare a == b here, because * a NaN is always Unordered to any other value, even to itself! @@ -782,13 +815,16 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) { /* * convert to other mode */ -tarval *tarval_convert_to(tarval *src, ir_mode *m) { - char *buffer; +tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) { + char *buffer; + fp_value *res; + const ieee_descriptor_t *desc; 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 */ @@ -803,40 +839,28 @@ 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)) { - case 32: - fc_cast(src->value, 8, 23, NULL); - break; - case 64: - fc_cast(src->value, 11, 52, NULL); - break; - case 80: - fc_cast(src->value, 15, 64, NULL); - break; - default: - break; - } - return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m); + desc = get_descriptor(dst_mode); + fc_cast(src->value, desc, NULL); + return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode); case irms_int_number: switch (GET_FLOAT_TO_INT_MODE()) { case TRUNCATE: - fc_int(src->value, NULL); + res = fc_int(src->value, NULL); break; case ROUND: - fc_rnd(src->value, NULL); + res = fc_rnd(src->value, NULL); break; default: - assert(0); + panic("Unsupported float to int conversion mode in tarval_convert_to()"); break; } - /* FIXME: floating point unit can't produce a value in integer - * representation - * an intermediate representation is needed here first. */ - /* return get_tarval(); */ - return tarval_bad; + buffer = alloca(sc_get_buffer_length()); + if (! fc_flt2int(res, buffer, dst_mode)) + return tarval_bad; + return get_tarval(buffer, sc_get_buffer_length(), dst_mode); default: /* the rest can't be converted */ @@ -846,14 +870,14 @@ 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 */ @@ -870,18 +894,9 @@ 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)) { - 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); + 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; @@ -890,16 +905,16 @@ tarval *tarval_convert_to(tarval *src, ir_mode *m) { case irms_internal_boolean: /* beware: this is C semantic for the INTERNAL boolean mode */ - if (get_mode_sort(m) == irms_int_number) - return src == tarval_b_true ? get_mode_one(m) : get_mode_null(m); + 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(m) == 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); + return get_tarval_overflow(buffer, src->length, dst_mode); } break; } @@ -918,6 +933,7 @@ 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); @@ -959,8 +975,9 @@ tarval *tarval_neg(tarval *a) { return get_tarval_overflow(buffer, a->length, a->mode); case irms_float_number: - if(no_float) - return tarval_bad; + /* it should be safe to enable this even if other arithmetic is disabled */ + /*if (no_float) + return tarval_bad;*/ fc_neg(a->value, NULL); return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode); @@ -978,14 +995,22 @@ tarval *tarval_add(tarval *a, tarval *b) { 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) && 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()); @@ -993,7 +1018,7 @@ tarval *tarval_add(tarval *a, tarval *b) { return get_tarval_overflow(buffer, a->length, a->mode); case irms_float_number: - if(no_float) + if (no_float) return tarval_bad; fc_add(a->value, b->value, NULL); @@ -1007,18 +1032,27 @@ tarval *tarval_add(tarval *a, tarval *b) { /* * subtraction */ -tarval *tarval_sub(tarval *a, tarval *b) { - char *buffer; +tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode) { + char *buffer; assert(a); assert(b); - assert(a->mode == b->mode); 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()); @@ -1026,7 +1060,7 @@ tarval *tarval_sub(tarval *a, tarval *b) { return get_tarval_overflow(buffer, a->length, a->mode); case irms_float_number: - if(no_float) + if (no_float) return tarval_bad; fc_sub(a->value, b->value, NULL); @@ -1060,7 +1094,7 @@ tarval *tarval_mul(tarval *a, tarval *b) { return get_tarval_overflow(buffer, a->length, a->mode); case irms_float_number: - if(no_float) + if (no_float) return tarval_bad; fc_mul(a->value, b->value, NULL); @@ -1079,7 +1113,7 @@ tarval *tarval_quo(tarval *a, tarval *b) { assert(b); assert((a->mode == b->mode) && mode_is_float(a->mode)); - if(no_float) + if (no_float) return tarval_bad; if (get_mode_n_vector_elems(a->mode) > 1) { @@ -1133,6 +1167,33 @@ 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 */ @@ -1157,8 +1218,9 @@ tarval *tarval_abs(tarval *a) { return a; case irms_float_number: - if(no_float) - return tarval_bad; + /* it should be safe to enable this even if other arithmetic is disabled */ + /*if (no_float) + return tarval_bad;*/ if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) { fc_neg(a->value, NULL); @@ -1182,7 +1244,7 @@ tarval *tarval_and(tarval *a, tarval *b) { /* works even for vector modes */ - switch(get_mode_sort(a->mode)) { + switch (get_mode_sort(a->mode)) { case irms_internal_boolean: return (a == tarval_b_false) ? a : b; @@ -1199,7 +1261,7 @@ 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); @@ -1326,9 +1388,9 @@ 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); @@ -1348,7 +1410,7 @@ 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); } @@ -1356,6 +1418,7 @@ 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(); } @@ -1431,7 +1494,15 @@ 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; @@ -1454,7 +1525,7 @@ 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 = xmalloc((n + 1) * sizeof(char)); + char *res = XMALLOCN(char, n + 1); unsigned char byte; for(i = 0; i < bytes; i++) { @@ -1508,29 +1579,6 @@ 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 == get_mode_minus_one(tv->mode))) - return TV_CLASSIFY_ALL_ONE; - - return TV_CLASSIFY_OTHER; -} - /* * Returns non-zero if a given (integer) tarval has only one single bit * set. @@ -1572,6 +1620,15 @@ 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) { + 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); @@ -1582,6 +1639,45 @@ 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. */ @@ -1614,38 +1710,48 @@ static const tarval_mode_info hex_output = { /* * Initialization of the tarval module: called before init_mode() */ -void init_tarval_1(long null_value) { +void init_tarval_1(long null_value, int support_quad_precision) { + /* if these assertion fail, tarval_is_constant() will follow ... */ + assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!"); + assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!"); + _null_value = null_value; /* initialize the sets holding the tarvals with a comparison function and * an initial size, which is the expected number of constants */ - tarvals = new_set(memcmp, N_CONSTANTS); + tarvals = new_set(cmp_tv, N_CONSTANTS); values = new_set(memcmp, N_CONSTANTS); - /* init strcalc with precision of 68 to support floating point values with 64 - * bit mantissa (needs extra bits for rounding and overflow) */ - init_strcalc(68); - init_fltcalc(0); + /* calls init_strcalc() with needed size */ + init_fltcalc(support_quad_precision ? 112 : 64); } /* * Initialization of the tarval module: called after init_mode() */ void init_tarval_2(void) { - tarval_bad->kind = k_tarval; - tarval_bad->mode = mode_BAD; - tarval_bad->value = INT_TO_PTR(resid_tarval_bad); + tarval_bad->kind = k_tarval; + tarval_bad->mode = mode_BAD; + tarval_bad->value = INT_TO_PTR(resid_tarval_bad); + + tarval_undefined->kind = k_tarval; + tarval_undefined->mode = mode_ANY; + tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined); - tarval_undefined->kind = k_tarval; - tarval_undefined->mode = mode_ANY; - tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined); + tarval_b_true->kind = k_tarval; + tarval_b_true->mode = mode_b; + tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true); - tarval_b_true->kind = k_tarval; - tarval_b_true->mode = mode_b; - tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true); + tarval_b_false->kind = k_tarval; + tarval_b_false->mode = mode_b; + tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false); - tarval_b_false->kind = k_tarval; - tarval_b_false->mode = mode_b; - tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false); + tarval_unreachable->kind = k_tarval; + tarval_unreachable->mode = mode_X; + tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable); + + tarval_reachable->kind = k_tarval; + tarval_reachable->mode = mode_X; + tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable); /* * assign output modes that are compatible with the @@ -1670,6 +1776,10 @@ void finish_tarval(void) { del_set(values); values = NULL; } +int (is_tarval)(const void *thing) { + return _is_tarval(thing); +} + /**************************************************************************** * end of tv.c ****************************************************************************/