/usr/lib/gcc-cross/powerpc64-linux-gnu/7/plugin/include/data-streamer.h is in gcc-7-plugin-dev-powerpc64-linux-gnu 7.3.0-16ubuntu3cross1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 | /* Generic streaming support for various data types.
Copyright (C) 2011-2017 Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@google.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_DATA_STREAMER_H
#define GCC_DATA_STREAMER_H
#include "lto-streamer.h"
/* Data structures used to pack values and bitflags into a vector of
words. Used to stream values of a fixed number of bits in a space
efficient way. */
static unsigned const BITS_PER_BITPACK_WORD = HOST_BITS_PER_WIDE_INT;
typedef unsigned HOST_WIDE_INT bitpack_word_t;
struct bitpack_d
{
/* The position of the first unused or unconsumed bit in the word. */
unsigned pos;
/* The current word we are (un)packing. */
bitpack_word_t word;
/* The lto_output_stream or the lto_input_block we are streaming to/from. */
void *stream;
};
/* In data-streamer.c */
void bp_pack_var_len_unsigned (struct bitpack_d *, unsigned HOST_WIDE_INT);
void bp_pack_var_len_int (struct bitpack_d *, HOST_WIDE_INT);
unsigned HOST_WIDE_INT bp_unpack_var_len_unsigned (struct bitpack_d *);
HOST_WIDE_INT bp_unpack_var_len_int (struct bitpack_d *);
/* In data-streamer-out.c */
void streamer_write_zero (struct output_block *);
void streamer_write_uhwi (struct output_block *, unsigned HOST_WIDE_INT);
void streamer_write_hwi (struct output_block *, HOST_WIDE_INT);
void streamer_write_gcov_count (struct output_block *, gcov_type);
void streamer_write_string (struct output_block *, struct lto_output_stream *,
const char *, bool);
void streamer_write_string_with_length (struct output_block *,
struct lto_output_stream *,
const char *, unsigned int, bool);
void bp_pack_string_with_length (struct output_block *, struct bitpack_d *,
const char *, unsigned int, bool);
void bp_pack_string (struct output_block *, struct bitpack_d *,
const char *, bool);
void streamer_write_uhwi_stream (struct lto_output_stream *,
unsigned HOST_WIDE_INT);
void streamer_write_hwi_stream (struct lto_output_stream *, HOST_WIDE_INT);
void streamer_write_gcov_count_stream (struct lto_output_stream *, gcov_type);
void streamer_write_data_stream (struct lto_output_stream *, const void *,
size_t);
void streamer_write_wide_int (struct output_block *, const wide_int &);
void streamer_write_widest_int (struct output_block *, const widest_int &);
/* In data-streamer-in.c */
const char *streamer_read_string (struct data_in *, struct lto_input_block *);
const char *streamer_read_indexed_string (struct data_in *,
struct lto_input_block *,
unsigned int *);
const char *bp_unpack_indexed_string (struct data_in *, struct bitpack_d *,
unsigned int *);
const char *bp_unpack_string (struct data_in *, struct bitpack_d *);
unsigned HOST_WIDE_INT streamer_read_uhwi (struct lto_input_block *);
HOST_WIDE_INT streamer_read_hwi (struct lto_input_block *);
gcov_type streamer_read_gcov_count (struct lto_input_block *);
wide_int streamer_read_wide_int (struct lto_input_block *);
widest_int streamer_read_widest_int (struct lto_input_block *);
/* Returns a new bit-packing context for bit-packing into S. */
static inline struct bitpack_d
bitpack_create (struct lto_output_stream *s)
{
struct bitpack_d bp;
bp.pos = 0;
bp.word = 0;
bp.stream = (void *)s;
return bp;
}
/* Pack the NBITS bit sized value VAL into the bit-packing context BP. */
static inline void
bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits)
{
bitpack_word_t word = bp->word;
int pos = bp->pos;
/* Verify that VAL fits in the NBITS. */
gcc_checking_assert (nbits == BITS_PER_BITPACK_WORD
|| !(val & ~(((bitpack_word_t)1<<nbits)-1)));
/* If val does not fit into the current bitpack word switch to the
next one. */
if (pos + nbits > BITS_PER_BITPACK_WORD)
{
streamer_write_uhwi_stream ((struct lto_output_stream *) bp->stream,
word);
word = val;
pos = nbits;
}
else
{
word |= val << pos;
pos += nbits;
}
bp->word = word;
bp->pos = pos;
}
/* Finishes bit-packing of BP. */
static inline void
streamer_write_bitpack (struct bitpack_d *bp)
{
streamer_write_uhwi_stream ((struct lto_output_stream *) bp->stream,
bp->word);
bp->word = 0;
bp->pos = 0;
}
/* Returns a new bit-packing context for bit-unpacking from IB. */
static inline struct bitpack_d
streamer_read_bitpack (struct lto_input_block *ib)
{
struct bitpack_d bp;
bp.word = streamer_read_uhwi (ib);
bp.pos = 0;
bp.stream = (void *)ib;
return bp;
}
/* Unpacks NBITS bits from the bit-packing context BP and returns them. */
static inline bitpack_word_t
bp_unpack_value (struct bitpack_d *bp, unsigned nbits)
{
bitpack_word_t mask, val;
int pos = bp->pos;
mask = (nbits == BITS_PER_BITPACK_WORD
? (bitpack_word_t) -1
: ((bitpack_word_t) 1 << nbits) - 1);
/* If there are not continuous nbits in the current bitpack word
switch to the next one. */
if (pos + nbits > BITS_PER_BITPACK_WORD)
{
bp->word = val
= streamer_read_uhwi ((struct lto_input_block *)bp->stream);
bp->pos = nbits;
return val & mask;
}
val = bp->word;
val >>= pos;
bp->pos = pos + nbits;
return val & mask;
}
/* Write a character to the output block. */
static inline void
streamer_write_char_stream (struct lto_output_stream *obs, char c)
{
/* No space left. */
if (obs->left_in_block == 0)
lto_append_block (obs);
/* Write the actual character. */
char *current_pointer = obs->current_pointer;
*(current_pointer++) = c;
obs->current_pointer = current_pointer;
obs->total_size++;
obs->left_in_block--;
}
/* Read byte from the input block. */
static inline unsigned char
streamer_read_uchar (struct lto_input_block *ib)
{
if (ib->p >= ib->len)
lto_section_overrun (ib);
return (ib->data[ib->p++]);
}
/* Output VAL into OBS and verify it is in range MIN...MAX that is supposed
to be compile time constant.
Be host independent, limit range to 31bits. */
static inline void
streamer_write_hwi_in_range (struct lto_output_stream *obs,
HOST_WIDE_INT min,
HOST_WIDE_INT max,
HOST_WIDE_INT val)
{
HOST_WIDE_INT range = max - min;
gcc_checking_assert (val >= min && val <= max && range > 0
&& range < 0x7fffffff);
val -= min;
streamer_write_uhwi_stream (obs, (unsigned HOST_WIDE_INT) val);
}
/* Input VAL into OBS and verify it is in range MIN...MAX that is supposed
to be compile time constant. PURPOSE is used for error reporting. */
static inline HOST_WIDE_INT
streamer_read_hwi_in_range (struct lto_input_block *ib,
const char *purpose,
HOST_WIDE_INT min,
HOST_WIDE_INT max)
{
HOST_WIDE_INT range = max - min;
unsigned HOST_WIDE_INT uval = streamer_read_uhwi (ib);
gcc_checking_assert (range > 0 && range < 0x7fffffff);
HOST_WIDE_INT val = (HOST_WIDE_INT) (uval + (unsigned HOST_WIDE_INT) min);
if (val < min || val > max)
lto_value_range_error (purpose, val, min, max);
return val;
}
/* Output VAL into BP and verify it is in range MIN...MAX that is supposed
to be compile time constant.
Be host independent, limit range to 31bits. */
static inline void
bp_pack_int_in_range (struct bitpack_d *bp,
HOST_WIDE_INT min,
HOST_WIDE_INT max,
HOST_WIDE_INT val)
{
HOST_WIDE_INT range = max - min;
int nbits = floor_log2 (range) + 1;
gcc_checking_assert (val >= min && val <= max && range > 0
&& range < 0x7fffffff);
val -= min;
bp_pack_value (bp, val, nbits);
}
/* Input VAL into BP and verify it is in range MIN...MAX that is supposed
to be compile time constant. PURPOSE is used for error reporting. */
static inline HOST_WIDE_INT
bp_unpack_int_in_range (struct bitpack_d *bp,
const char *purpose,
HOST_WIDE_INT min,
HOST_WIDE_INT max)
{
HOST_WIDE_INT range = max - min;
int nbits = floor_log2 (range) + 1;
HOST_WIDE_INT val = bp_unpack_value (bp, nbits);
gcc_checking_assert (range > 0 && range < 0x7fffffff);
if (val < min || val > max)
lto_value_range_error (purpose, val, min, max);
return val;
}
/* Output VAL of type "enum enum_name" into OBS.
Assume range 0...ENUM_LAST - 1. */
#define streamer_write_enum(obs,enum_name,enum_last,val) \
streamer_write_hwi_in_range ((obs), 0, (int)(enum_last) - 1, (int)(val))
/* Input enum of type "enum enum_name" from IB.
Assume range 0...ENUM_LAST - 1. */
#define streamer_read_enum(ib,enum_name,enum_last) \
(enum enum_name)streamer_read_hwi_in_range ((ib), #enum_name, 0, \
(int)(enum_last) - 1)
/* Output VAL of type "enum enum_name" into BP.
Assume range 0...ENUM_LAST - 1. */
#define bp_pack_enum(bp,enum_name,enum_last,val) \
bp_pack_int_in_range ((bp), 0, (int)(enum_last) - 1, (int)(val))
/* Input enum of type "enum enum_name" from BP.
Assume range 0...ENUM_LAST - 1. */
#define bp_unpack_enum(bp,enum_name,enum_last) \
(enum enum_name)bp_unpack_int_in_range ((bp), #enum_name, 0, \
(int)(enum_last) - 1)
/* Output the start of a record with TAG to output block OB. */
static inline void
streamer_write_record_start (struct output_block *ob, enum LTO_tags tag)
{
streamer_write_enum (ob->main_stream, LTO_tags, LTO_NUM_TAGS, tag);
}
/* Return the next tag in the input block IB. */
static inline enum LTO_tags
streamer_read_record_start (struct lto_input_block *ib)
{
return streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
}
#endif /* GCC_DATA_STREAMER_H */
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