2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * File name: ir/tv/strcalc.h
23 * Purpose: Provides basic mathematical operations on values represented as strings.
24 * Author: Mathias Heil
28 * Copyright: (c) 2003 Universität Karlsruhe
34 * The module uses a string to represent values, and provides operations
35 * to perform calculations with these values.
36 * Results are stored in an internal buffer, so you have to make a copy
37 * of them if you need to store the result.
46 #ifdef STRCALC_DEBUG_ALL /* switch on all debug options */
47 # ifndef STRCALC_DEBUG
48 # define STRCALC_DEBUG /* switch on debug output */
50 # ifndef STRCALC_DEBUG_PRINTCOMP /* print arguments and result of each computation */
51 # define STRCALC_DEBUG_PRINTCOMP
53 # ifndef STRCALC_DEBUG_FULLPRINT
54 # define STRCALC_DEBUG_FULLPRINT /* print full length of values (e.g. 128 bit instead of 64 bit using default init) */
56 # ifndef STRCALC_DEBUG_GROUPPRINT
57 # define STRCALC_DEBUG_GROUPPRINT /* print spaces after each 8 bits */
62 * constants, typedefs, enums
65 #define SC_DEFAULT_PRECISION 64
87 * Possible operations on integer values.
90 SC_ADD = 0, /**< Addition */
91 SC_SUB, /**< Substraction */
92 SC_NEG, /**< Unary Minus */
93 SC_MUL, /**< Multiplication */
94 SC_DIV, /**< Integer Division (with rounding toward zero ?) */
95 SC_MOD, /**< Devision Remainder */
96 SC_SHL, /**< Left Shift */
97 SC_SHR, /**< Logical (unsigned) Right Shift */
98 SC_SHRS, /**< Arithmetic (signed) Right Shift */
99 SC_ROT, /**< Rotation (both directions) */
100 SC_AND, /**< Bitwise And */
101 SC_OR, /**< Bitwise Or */
102 SC_NOT, /**< Bitwise Not */
103 SC_XOR /**< Bitwise Exclusive Or */
107 * The output mode for integer values.
110 SC_hex, /**< hexadecimal output with small letters */
111 SC_HEX, /**< hexadecimal output with BIG letters */
112 SC_DEC, /**< decimal output */
113 SC_OCT, /**< octal output */
114 SC_BIN /**< binary output */
118 * definitions and macros
120 #define sc_add(a, b, c) sc_calc((a), (b), SC_ADD, (c))
121 #define sc_sub(a, b, c) sc_calc((a), (b), SC_SUB, (c))
122 #define sc_neg(a, c) sc_calc((a), NULL, SC_NEG, (c))
123 #define sc_and(a, b, c) sc_calc((a), (b), SC_AND, (c))
124 #define sc_or(a, b, c) sc_calc((a), (b), SC_OR, (c))
125 #define sc_xor(a, b, c) sc_calc((a), (b), SC_XOR, (c))
126 #define sc_not(a, c) sc_calc((a), NULL, SC_NOT, (c))
127 #define sc_mul(a, b, c) sc_calc((a), (b), SC_MUL, (c))
128 #define sc_div(a, b, c) sc_calc((a), (b), SC_DIV, (c))
129 #define sc_mod(a, b, c) sc_calc((a), (b), SC_MOD, (c))
130 #define sc_shl(a, b, c, d, e) sc_bitcalc((a), (b), (c), (d), SC_SHL, (e))
131 #define sc_shr(a, b, c, d, e) sc_bitcalc((a), (b), (c), (d), SC_SHR, (e))
132 #define sc_shrs(a, b, c, d, e) sc_bitcalc((a), (b), (c), (d), SC_SHRS, (e))
133 #define sc_rot(a, b, c, d, e) sc_bitcalc((a), (b), (c), (d), SC_ROT, (e))
136 * function declarations
138 const void *sc_get_buffer(void);
139 int sc_get_buffer_length(void);
141 void sign_extend(char *calc_buffer, ir_mode *mode);
143 /** create an value form a string representation */
144 void sc_val_from_str(const char *str, unsigned int len, void *buffer, ir_mode *mode);
146 /** create a value from a long */
147 void sc_val_from_long(long l, void *buffer);
149 /** create a value form an unsigned long */
150 void sc_val_from_ulong(unsigned long l, void *buffer);
152 /** converts a value to a long */
153 long sc_val_to_long(const void *val);
154 void sc_min_from_bits(unsigned int num_bits, unsigned int sign, void *buffer);
155 void sc_max_from_bits(unsigned int num_bits, unsigned int sign, void *buffer);
157 void sc_calc(const void *val1, const void *val2, unsigned op, void *buffer);
158 void sc_bitcalc(const void *val1, const void *val2, int radius, int sign, unsigned op, void *buffer);
159 int sc_comp(const void *val1, const void *val2);
161 int sc_get_highest_set_bit(const void *value);
162 int sc_get_lowest_set_bit(const void *value);
163 int sc_is_zero(const void *value);
164 int sc_is_negative(const void *value);
165 int sc_had_carry(void);
166 unsigned char sc_sub_bits(const void *value, int len, unsigned byte_ofs);
169 * Converts a tarval into a string.
171 * @param val1 the value pointer
172 * @param bits number of valid bits in this value
173 * @param base output base
174 * @param signed_mode print it signed (only decimal mode supported
176 const char *sc_print(const void *val1, unsigned bits, enum base_t base, int signed_mode);
178 /** Initialize the strcalc module.
179 * Sets up internal data structures and constants
180 * After the first call subsequent calls have no effect
182 * @param precision_in_bytes Specifies internal precision to be used
183 * for calculations. The reason for being multiples of 8 eludes me
185 void init_strcalc(int precision_in_bytes);
186 void finish_strcalc(void);
187 int sc_get_precision(void);
189 #endif /* _STRCALC_H_ */