X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ftv.c;h=afb06da9bcdbc895872e632141cdfd9279cc1008;hb=d615bce88ef8f2617140000095fa7bc216ed106b;hp=41442e66b5e60da05d38e931094bf28556b60a2d;hpb=52fc088a09bee9c2b2eb086c1bbed4107304675d;p=libfirm

diff --git a/ir/tv/tv.c b/ir/tv/tv.c
index 41442e66b..afb06da9b 100644
--- a/ir/tv/tv.c
+++ b/ir/tv/tv.c
@@ -24,7 +24,7 @@
  * @date     2003
  * @author   Mathias Heil
  * @version  $Id$
- * @summary
+ * @brief
  *
  * Values are stored in a format depending upon chosen arithmetic
  * module. Default uses strcalc and fltcalc.
@@ -33,19 +33,20 @@
  */
 #include "config.h"
 
-#include <assert.h>         /* assertions */
-#include <stdlib.h>         /* atoi() */
+#include <assert.h>
+#include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_STRINGS_H
-#include <strings.h>        /* strings.h also includes bsd only function strcasecmp */
+#include <strings.h>
 #endif
 #include <stdlib.h>
 
+#include "bitfiddle.h"
 #include "tv_t.h"
-#include "set.h"            /* to store tarvals in */
-#include "entity_t.h"       /* needed to store pointers to entities */
+#include "set.h"
+#include "entity_t.h"
 #include "irmode_t.h"
-#include "irnode.h"         /* defines boolean return values (pnc_number)*/
+#include "irnode.h"
 #include "strcalc.h"
 #include "fltcalc.h"
 #include "irtools.h"
@@ -57,9 +58,6 @@
     target values */
 #define N_CONSTANTS 2048
 
-/* get the integer overflow mode */
-#define GET_OVERFLOW_MODE() int_overflow_mode
-
 /* unused, float to int doesn't work yet */
 enum float_to_int_mode {
 	TRUNCATE,
@@ -147,12 +145,14 @@ inline static void tarval_verify(tarval *tv)
 #endif /* NDEBUG */
 
 /** Hash a tarval. */
-static int hash_tv(tarval *tv) {
+static int hash_tv(tarval *tv)
+{
 	return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
 }
 
 /** Hash a value. Treat it as a byte array. */
-static int hash_val(const void *value, unsigned int length) {
+static int hash_val(const void *value, unsigned int length)
+{
 	unsigned int i;
 	unsigned int hash = 0;
 
@@ -165,7 +165,8 @@ 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) {
+static int cmp_tv(const void *p1, const void *p2, size_t n)
+{
 	const tarval *tv1 = p1;
 	const tarval *tv2 = p2;
 	(void) n;
@@ -189,7 +190,8 @@ static int cmp_tv(const void *p1, const void *p2, size_t n) {
 }
 
 /** finds tarval with value/mode or creates new tarval */
-static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
+static tarval *get_tarval(const void *value, int length, ir_mode *mode)
+{
 	tarval tv;
 
 	tv.kind   = k_tarval;
@@ -231,7 +233,7 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
 
 	case irms_int_number:
 		if (sc_comp(value, get_mode_max(mode)->value) == 1) {
-			switch (GET_OVERFLOW_MODE()) {
+			switch (tarval_get_integer_overflow_mode()) {
 			case TV_OVERFLOW_SATURATE:
 				return get_mode_max(mode);
 			case TV_OVERFLOW_WRAP:
@@ -248,7 +250,7 @@ static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
 			}
 		}
 		if (sc_comp(value, get_mode_min(mode)->value) == -1) {
-			switch (GET_OVERFLOW_MODE()) {
+			switch (tarval_get_integer_overflow_mode()) {
 			case TV_OVERFLOW_SATURATE:
 				return get_mode_min(mode);
 			case TV_OVERFLOW_WRAP: {
@@ -298,23 +300,89 @@ tarval *tarval_unreachable = &reserved_tv[5];
 /**
  * get the float descriptor for given mode.
  */
-static const ieee_descriptor_t *get_descriptor(const ir_mode *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;
+	case 96:
+	case 128: return &extended_desc; /* FIXME: HACK for x86 where we have
+										sizeof(long double)==16 with 10 byte
+										real payload */
+	/* case 128: return &quad_desc; */
 	default:
 		panic("Unsupported mode in get_descriptor()");
 		return NULL;
 	}
 }
 
-/*
- *   public functions declared in tv.h
- */
+tarval *new_integer_tarval_from_str(const char *str, size_t len, char sign,
+                                    unsigned char base, ir_mode *mode)
+{
+	void *buffer;
+	int   ok;
+
+	buffer = alloca(sc_get_buffer_length());
+
+	ok = sc_val_from_str(sign, base, str, len, buffer);
+	if (!ok)
+		return tarval_bad;
+
+	return get_tarval_overflow(buffer, sc_get_buffer_length(), mode);
+}
+
+static tarval *new_tarval_from_str_int(const char *str, size_t len,
+                                       ir_mode *mode)
+{
+	void    *buffer;
+	unsigned base = 10;
+	char     sign = 1;
+	int      ok;
+
+	/* skip leading spaces */
+	while (len > 0 && str[0] == ' ') {
+		++str;
+		--len;
+	}
+	if (len == 0)
+		return tarval_bad;
+
+	/* 1 sign character allowed */
+	if (str[0] == '-') {
+		sign = -1;
+		++str;
+		--len;
+	} else if (str[0] == '+') {
+		++str;
+		--len;
+	}
+
+	/* a number starting with '0x' is hexadeciaml,
+	 * a number starting with '0' (and at least 1 more char) is octal */
+	if (len >= 2 && str[0] == '0') {
+		if (str[1] == 'x' || str[1] == 'X') {
+			str += 2;
+			len -= 2;
+			base = 16;
+		} else {
+			++str;
+			--len;
+			base = 8;
+		}
+	}
+	if (len == 0)
+		return tarval_bad;
+
+	buffer = alloca(sc_get_buffer_length());
+
+	ok = sc_val_from_str(sign, base, str, len, buffer);
+	if (!ok)
+		return tarval_bad;
+
+	return get_tarval_overflow(buffer, sc_get_buffer_length(), mode);
+}
 
 /*
  * Constructors =============================================================
@@ -353,8 +421,7 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
 			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);
+		return new_tarval_from_str_int(str, len, mode);
 	}
 	panic("Unsupported tarval creation with mode %F", mode);
 }
@@ -362,7 +429,8 @@ tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
 /*
  * helper function, create a tarval from long
  */
-tarval *new_tarval_from_long(long l, ir_mode *mode) {
+tarval *new_tarval_from_long(long l, ir_mode *mode)
+{
 	assert(mode);
 
 	switch (get_mode_sort(mode))   {
@@ -386,7 +454,8 @@ 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) {
+int tarval_is_long(tarval *tv)
+{
 	if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
 		return 0;
 
@@ -402,13 +471,15 @@ int tarval_is_long(tarval *tv) {
 }
 
 /* this might overflow the machine's long, so use only with small values */
-long get_tarval_long(tarval* tv) {
+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);
 }
 
-tarval *new_tarval_from_double(long double d, ir_mode *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));
@@ -418,13 +489,15 @@ tarval *new_tarval_from_double(long double d, ir_mode *mode) {
 }
 
 /* returns non-zero if can be converted to double */
-int tarval_is_double(tarval *tv) {
+int tarval_is_double(tarval *tv)
+{
 	assert(tv);
 
 	return (get_mode_sort(tv->mode) == irms_float_number);
 }
 
-long double get_tarval_double(tarval *tv) {
+long double get_tarval_double(tarval *tv)
+{
 	assert(tarval_is_double(tv));
 
 	return fc_val_to_ieee754(tv->value);
@@ -436,7 +509,8 @@ long double get_tarval_double(tarval *tv) {
  */
 
 /* get the mode of the tarval */
-ir_mode *(get_tarval_mode)(const tarval *tv) {
+ir_mode *(get_tarval_mode)(const tarval *tv)
+{
 	return _get_tarval_mode(tv);
 }
 
@@ -450,31 +524,38 @@ ir_mode *(get_tarval_mode)(const tarval *tv) {
  * therefore the irmode functions should be preferred to the functions below.
  */
 
-tarval *(get_tarval_bad)(void) {
+tarval *(get_tarval_bad)(void)
+{
 	return _get_tarval_bad();
 }
 
-tarval *(get_tarval_undefined)(void) {
+tarval *(get_tarval_undefined)(void)
+{
 	return _get_tarval_undefined();
 }
 
-tarval *(get_tarval_b_false)(void) {
+tarval *(get_tarval_b_false)(void)
+{
 	return _get_tarval_b_false();
 }
 
-tarval *(get_tarval_b_true)(void) {
+tarval *(get_tarval_b_true)(void)
+{
 	return _get_tarval_b_true();
 }
 
-tarval *(get_tarval_reachable)(void) {
+tarval *(get_tarval_reachable)(void)
+{
 	return _get_tarval_reachable();
 }
 
-tarval *(get_tarval_unreachable)(void) {
+tarval *(get_tarval_unreachable)(void)
+{
 	return _get_tarval_unreachable();
 }
 
-tarval *get_tarval_max(ir_mode *mode) {
+tarval *get_tarval_max(ir_mode *mode)
+{
 	const ieee_descriptor_t *desc;
 
 	assert(mode);
@@ -505,7 +586,8 @@ tarval *get_tarval_max(ir_mode *mode) {
 	return tarval_bad;
 }
 
-tarval *get_tarval_min(ir_mode *mode) {
+tarval *get_tarval_min(ir_mode *mode)
+{
 	const ieee_descriptor_t *desc;
 
 	assert(mode);
@@ -539,7 +621,8 @@ tarval *get_tarval_min(ir_mode *mode) {
 /** The bit pattern for the pointer NULL */
 static long _null_value = 0;
 
-tarval *get_tarval_null(ir_mode *mode) {
+tarval *get_tarval_null(ir_mode *mode)
+{
 	assert(mode);
 
 	if (get_mode_n_vector_elems(mode) > 1) {
@@ -566,7 +649,8 @@ tarval *get_tarval_null(ir_mode *mode) {
 	return tarval_bad;
 }
 
-tarval *get_tarval_one(ir_mode *mode) {
+tarval *get_tarval_one(ir_mode *mode)
+{
 	assert(mode);
 
 	if (get_mode_n_vector_elems(mode) > 1)
@@ -591,7 +675,8 @@ tarval *get_tarval_one(ir_mode *mode) {
 	return tarval_bad;
 }
 
-tarval *get_tarval_all_one(ir_mode *mode) {
+tarval *get_tarval_all_one(ir_mode *mode)
+{
 	assert(mode);
 
 	if (get_mode_n_vector_elems(mode) > 1)
@@ -615,7 +700,8 @@ tarval *get_tarval_all_one(ir_mode *mode) {
 	return tarval_bad;
 }
 
-int tarval_is_constant(tarval *tv) {
+int tarval_is_constant(tarval *tv)
+{
 	int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
 
 	/* reserved tarvals are NOT constants. Note that although
@@ -623,7 +709,8 @@ int tarval_is_constant(tarval *tv) {
 	return (tv < &reserved_tv[2] || tv > &reserved_tv[num_res - 1]);
 }
 
-tarval *get_tarval_minus_one(ir_mode *mode) {
+tarval *get_tarval_minus_one(ir_mode *mode)
+{
 	assert(mode);
 
 	if (get_mode_n_vector_elems(mode) > 1)
@@ -648,7 +735,8 @@ tarval *get_tarval_minus_one(ir_mode *mode) {
 	return tarval_bad;
 }
 
-tarval *get_tarval_nan(ir_mode *mode) {
+tarval *get_tarval_nan(ir_mode *mode)
+{
 	const ieee_descriptor_t *desc;
 
 	assert(mode);
@@ -663,7 +751,8 @@ tarval *get_tarval_nan(ir_mode *mode) {
 		panic("mode %F does not support NaN value", mode);
 }
 
-tarval *get_tarval_plus_inf(ir_mode *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");
@@ -676,7 +765,8 @@ tarval *get_tarval_plus_inf(ir_mode *mode) {
 		panic("mode %F does not support +inf value", mode);
 }
 
-tarval *get_tarval_minus_inf(ir_mode *mode) {
+tarval *get_tarval_minus_inf(ir_mode *mode)
+{
 	assert(mode);
 
 	if (get_mode_n_vector_elems(mode) > 1)
@@ -697,7 +787,8 @@ tarval *get_tarval_minus_inf(ir_mode *mode) {
 /*
  * test if negative number, 1 means 'yes'
  */
-int tarval_is_negative(tarval *a) {
+int tarval_is_negative(tarval *a)
+{
 	if (get_mode_n_vector_elems(a->mode) > 1)
 		panic("vector arithmetic not implemented yet");
 
@@ -718,7 +809,8 @@ int tarval_is_negative(tarval *a) {
 /*
  * test if null, 1 means 'yes'
  */
-int tarval_is_null(tarval *a) {
+int tarval_is_null(tarval *a)
+{
 	return
 		a != tarval_bad &&
 		a == get_mode_null(get_tarval_mode(a));
@@ -727,13 +819,15 @@ int tarval_is_null(tarval *a) {
 /*
  * test if one, 1 means 'yes'
  */
-int tarval_is_one(tarval *a) {
+int tarval_is_one(tarval *a)
+{
 	return
 		a != tarval_bad &&
 		a == get_mode_one(get_tarval_mode(a));
 }
 
-int tarval_is_all_one(tarval *tv) {
+int tarval_is_all_one(tarval *tv)
+{
 	return
 		tv != tarval_bad &&
 		tv == get_mode_all_one(get_tarval_mode(tv));
@@ -742,7 +836,8 @@ int tarval_is_all_one(tarval *tv) {
 /*
  * test if one, 1 means 'yes'
  */
-int tarval_is_minus_one(tarval *a) {
+int tarval_is_minus_one(tarval *a)
+{
 	return
 		a != tarval_bad &&
 		a == get_mode_minus_one(get_tarval_mode(a));
@@ -751,7 +846,8 @@ int tarval_is_minus_one(tarval *a) {
 /*
  * comparison
  */
-pn_Cmp tarval_cmp(tarval *a, tarval *b) {
+pn_Cmp tarval_cmp(tarval *a, tarval *b)
+{
 	carry_flag = -1;
 
 	if (a == tarval_bad || b == tarval_bad) {
@@ -811,10 +907,12 @@ pn_Cmp tarval_cmp(tarval *a, tarval *b) {
 /*
  * convert to other mode
  */
-tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
+tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode)
+{
 	char                    *buffer;
 	fp_value                *res;
 	const ieee_descriptor_t *desc;
+	int                      len;
 
 	carry_flag = -1;
 
@@ -889,11 +987,11 @@ tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
 			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",
+			len = 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);
+			fc_val_from_str(buffer, len, desc, NULL);
 			return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
 
 		default:
@@ -923,7 +1021,8 @@ tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
 /*
  * bitwise negation
  */
-tarval *tarval_not(tarval *a) {
+tarval *tarval_not(tarval *a)
+{
 	char *buffer;
 
 	carry_flag = -1;
@@ -953,7 +1052,8 @@ tarval *tarval_not(tarval *a) {
 /*
  * arithmetic negation
  */
-tarval *tarval_neg(tarval *a) {
+tarval *tarval_neg(tarval *a)
+{
 	char *buffer;
 
 	assert(mode_is_num(a->mode)); /* negation only for numerical values */
@@ -989,7 +1089,8 @@ tarval *tarval_neg(tarval *a) {
 /*
  * addition
  */
-tarval *tarval_add(tarval *a, tarval *b) {
+tarval *tarval_add(tarval *a, tarval *b)
+{
 	char *buffer;
 
 	carry_flag = -1;
@@ -1031,7 +1132,8 @@ tarval *tarval_add(tarval *a, tarval *b) {
 /*
  * subtraction
  */
-tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode) {
+tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode)
+{
 	char    *buffer;
 
 	carry_flag = -1;
@@ -1073,7 +1175,8 @@ tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode) {
 /*
  * multiplication
  */
-tarval *tarval_mul(tarval *a, tarval *b) {
+tarval *tarval_mul(tarval *a, tarval *b)
+{
 	char *buffer;
 
 	assert(a->mode == b->mode);
@@ -1107,7 +1210,8 @@ tarval *tarval_mul(tarval *a, tarval *b) {
 /*
  * floating point division
  */
-tarval *tarval_quo(tarval *a, tarval *b) {
+tarval *tarval_quo(tarval *a, tarval *b)
+{
 	assert((a->mode == b->mode) && mode_is_float(a->mode));
 
 	carry_flag = -1;
@@ -1128,7 +1232,8 @@ tarval *tarval_quo(tarval *a, tarval *b) {
  * integer division
  * overflow is impossible, but look out for division by zero
  */
-tarval *tarval_div(tarval *a, tarval *b) {
+tarval *tarval_div(tarval *a, tarval *b)
+{
 	assert((a->mode == b->mode) && mode_is_int(a->mode));
 
 	carry_flag = -1;
@@ -1149,7 +1254,8 @@ tarval *tarval_div(tarval *a, tarval *b) {
  * remainder
  * overflow is impossible, but look out for division by zero
  */
-tarval *tarval_mod(tarval *a, tarval *b) {
+tarval *tarval_mod(tarval *a, tarval *b)
+{
 	assert((a->mode == b->mode) && mode_is_int(a->mode));
 
 	carry_flag = -1;
@@ -1170,7 +1276,8 @@ tarval *tarval_mod(tarval *a, tarval *b) {
  * integer division AND remainder
  * overflow is impossible, but look out for division by zero
  */
-tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
+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);
@@ -1196,7 +1303,8 @@ tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
 /*
  * absolute value
  */
-tarval *tarval_abs(tarval *a) {
+tarval *tarval_abs(tarval *a)
+{
 	char *buffer;
 
 	carry_flag = -1;
@@ -1236,7 +1344,8 @@ tarval *tarval_abs(tarval *a) {
 /*
  * bitwise and
  */
-tarval *tarval_and(tarval *a, tarval *b) {
+tarval *tarval_and(tarval *a, tarval *b)
+{
 	assert(a->mode == b->mode);
 
 	/* works even for vector modes */
@@ -1256,10 +1365,32 @@ tarval *tarval_and(tarval *a, tarval *b) {
 	}
 }
 
+tarval *tarval_andnot(tarval *a, tarval *b)
+{
+	assert(a->mode == b->mode);
+
+	/* works even for vector modes */
+	carry_flag = 0;
+
+	switch (get_mode_sort(a->mode)) {
+	case irms_internal_boolean:
+		return a == tarval_b_true && b == tarval_b_false ? tarval_b_true : tarval_b_false;
+
+	case irms_int_number:
+		sc_andnot(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;
+	}
+}
+
 /*
  * bitwise or
  */
-tarval *tarval_or(tarval *a, tarval *b) {
+tarval *tarval_or(tarval *a, tarval *b)
+{
 	assert(a->mode == b->mode);
 
 	/* works even for vector modes */
@@ -1282,7 +1413,8 @@ tarval *tarval_or(tarval *a, tarval *b) {
 /*
  * bitwise exclusive or (xor)
  */
-tarval *tarval_eor(tarval *a, tarval *b) {
+tarval *tarval_eor(tarval *a, tarval *b)
+{
 	assert((a->mode == b->mode));
 
 	/* works even for vector modes */
@@ -1305,7 +1437,8 @@ tarval *tarval_eor(tarval *a, tarval *b) {
 /*
  * bitwise left shift
  */
-tarval *tarval_shl(tarval *a, tarval *b) {
+tarval *tarval_shl(tarval *a, tarval *b)
+{
 	char *temp_val = NULL;
 
 	assert(mode_is_int(a->mode) && mode_is_int(b->mode));
@@ -1332,7 +1465,8 @@ tarval *tarval_shl(tarval *a, tarval *b) {
 /*
  * bitwise unsigned right shift
  */
-tarval *tarval_shr(tarval *a, tarval *b) {
+tarval *tarval_shr(tarval *a, tarval *b)
+{
 	char *temp_val = NULL;
 
 	assert(mode_is_int(a->mode) && mode_is_int(b->mode));
@@ -1359,7 +1493,8 @@ tarval *tarval_shr(tarval *a, tarval *b) {
 /*
  * bitwise signed right shift
  */
-tarval *tarval_shrs(tarval *a, tarval *b) {
+tarval *tarval_shrs(tarval *a, tarval *b)
+{
 	char *temp_val = NULL;
 
 	assert(mode_is_int(a->mode) && mode_is_int(b->mode));
@@ -1386,7 +1521,8 @@ tarval *tarval_shrs(tarval *a, tarval *b) {
 /*
  * bitwise rotation to left
  */
-tarval *tarval_rotl(tarval *a, tarval *b) {
+tarval *tarval_rotl(tarval *a, tarval *b)
+{
 	char *temp_val = NULL;
 
 	assert(mode_is_int(a->mode) && mode_is_int(b->mode));
@@ -1413,7 +1549,8 @@ tarval *tarval_rotl(tarval *a, tarval *b) {
 /*
  * carry flag of the last operation
  */
-int tarval_carry(void) {
+int tarval_carry(void)
+{
 	if (carry_flag == -1)
 		panic("Carry undefined for the last operation");
 	return carry_flag;
@@ -1422,7 +1559,8 @@ int tarval_carry(void) {
 /*
  * Output of tarvals
  */
-int tarval_snprintf(char *buf, size_t len, tarval *tv) {
+int tarval_snprintf(char *buf, size_t len, tarval *tv)
+{
 	static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
 
 	const char *str;
@@ -1451,8 +1589,9 @@ int tarval_snprintf(char *buf, size_t len, tarval *tv) {
 			str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
 			break;
 
-		case TVO_HEX:
 		case TVO_NATIVE:
+			prefix = "0x";
+		case TVO_HEX:
 		default:
 			str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
 			break;
@@ -1508,7 +1647,8 @@ int tarval_snprintf(char *buf, size_t len, tarval *tv) {
 /**
  * Output of tarvals to stdio.
  */
-int tarval_printf(tarval *tv) {
+int tarval_printf(tarval *tv)
+{
 	char buf[1024];
 	int res;
 
@@ -1518,17 +1658,18 @@ int tarval_printf(tarval *tv) {
 	return res;
 }
 
-char *get_tarval_bitpattern(tarval *tv) {
+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;
 
-	for(i = 0; i < bytes; i++) {
+	for (i = 0; i < bytes; i++) {
 		byte = get_tarval_sub_bits(tv, i);
-		for(j = 1; j < 256; j <<= 1)
-			if(pos < n)
+		for (j = 1; j < 256; j <<= 1)
+			if (pos < n)
 				res[pos++] = j & byte ? '1' : '0';
 	}
 
@@ -1540,7 +1681,8 @@ char *get_tarval_bitpattern(tarval *tv) {
 /*
  * access to the bitpattern
  */
-unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
+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);
@@ -1558,7 +1700,8 @@ 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) {
+int  set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo)
+{
 	assert(mode);
 
 	mode->tv_priv = modeinfo;
@@ -1570,7 +1713,8 @@ 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) {
+const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode)
+{
 	assert(mode);
 
 	return mode->tv_priv;
@@ -1580,7 +1724,8 @@ const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) {
  * Returns non-zero if a given (integer) tarval has only one single bit
  * set.
  */
-int tarval_is_single_bit(tarval *tv) {
+int tarval_is_single_bit(tarval *tv)
+{
 	int i, l;
 	int bits;
 
@@ -1602,17 +1747,63 @@ int tarval_is_single_bit(tarval *tv) {
 	return bits;
 }
 
+/*
+ * Return the number of set bits in a given (integer) tarval.
+ */
+int get_tarval_popcnt(tarval *tv)
+{
+	int i, l;
+	int bits;
+
+	if (!tv || tv == tarval_bad) return -1;
+	if (! mode_is_int(tv->mode)) return -1;
+
+	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);
+
+		bits += popcnt(v);
+	}
+	return bits;
+}
+
+/**
+ * Return the number of the lowest set bit in a given (integer) tarval.
+ *
+ * @param tv    the tarval
+ *
+ * @return number of lowest set bit or -1 on error
+ */
+int get_tarval_lowest_bit(tarval *tv)
+{
+	int i, l;
+
+	if (!tv || tv == tarval_bad) return -1;
+	if (! mode_is_int(tv->mode)) return -1;
+
+	l = get_mode_size_bytes(tv->mode);
+	for (i = 0; i < l; ++i) {
+		unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
+
+		if (v)
+			return ntz(v) + i * 8;
+	}
+	return -1;
+}
+
 /*
  * 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) {
+int tarval_ieee754_zero_mantissa(tarval *tv)
+{
 	assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
 	return fc_zero_mantissa(tv->value);
 }
 
 /* Returns the exponent of a floating point IEEE-754 tarval. */
-int tarval_ieee754_get_exponent(tarval *tv) {
+int tarval_ieee754_get_exponent(tarval *tv)
+{
 	assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
 	return fc_get_exponent(tv->value);
 }
@@ -1621,24 +1812,28 @@ int tarval_ieee754_get_exponent(tarval *tv) {
  * 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) {
+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) {
+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) {
+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) {
+unsigned tarval_ieee754_get_mantissa_size(const ir_mode *mode)
+{
 	const ieee_descriptor_t *desc;
 
 	assert(get_mode_arithmetic(mode) == irma_ieee754);
@@ -1648,28 +1843,32 @@ unsigned tarval_ieee754_get_mantissa_size(const ir_mode *mode) {
 }
 
 /* check if its the a floating point NaN */
-int tarval_is_NaN(tarval *tv) {
+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) {
+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) {
+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) {
+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;
@@ -1678,21 +1877,25 @@ int tarval_is_finite(tarval *tv) {
 /*
  * Sets the overflow mode for integer operations.
  */
-void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
+void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode)
+{
 	int_overflow_mode = ov_mode;
 }
 
 /* Get the overflow mode for integer operations. */
-tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
+tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void)
+{
 	return int_overflow_mode;
 }
 
 /* Enable/Disable floating point constant folding. */
-void tarval_enable_fp_ops(int enable) {
+void tarval_enable_fp_ops(int enable)
+{
 	no_float = !enable;
 }
 
-int tarval_fp_ops_enabled(void) {
+int tarval_fp_ops_enabled(void)
+{
 	return !no_float;
 }
 
@@ -1708,7 +1911,8 @@ static const tarval_mode_info hex_output = {
 /*
  * Initialization of the tarval module: called before init_mode()
  */
-void init_tarval_1(long null_value, int support_quad_precision) {
+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!");
@@ -1726,7 +1930,8 @@ void init_tarval_1(long null_value, int support_quad_precision) {
 /*
  * Initialization of the tarval module: called after init_mode()
  */
-void init_tarval_2(void) {
+void init_tarval_2(void)
+{
 	tarval_bad->kind          = k_tarval;
 	tarval_bad->mode          = mode_BAD;
 	tarval_bad->value         = INT_TO_PTR(resid_tarval_bad);
@@ -1767,14 +1972,16 @@ void init_tarval_2(void) {
 }
 
 /* free all memory occupied by tarval. */
-void finish_tarval(void) {
+void finish_tarval(void)
+{
 	finish_strcalc();
 	finish_fltcalc();
 	del_set(tarvals); tarvals = NULL;
 	del_set(values);  values = NULL;
 }
 
-int (is_tarval)(const void *thing) {
+int (is_tarval)(const void *thing)
+{
 	return _is_tarval(thing);
 }