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f0efc7aa DN |
1 | /* Generic streaming support for basic data types. |
2 | ||
a945c346 | 3 | Copyright (C) 2011-2024 Free Software Foundation, Inc. |
f0efc7aa DN |
4 | Contributed by Diego Novillo <dnovillo@google.com> |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 3, or (at your option) any later | |
11 | version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
c7131fb2 | 25 | #include "backend.h" |
40e23961 | 26 | #include "tree.h" |
c7131fb2 | 27 | #include "gimple.h" |
c582198b | 28 | #include "cgraph.h" |
f0efc7aa DN |
29 | #include "data-streamer.h" |
30 | ||
31 | /* Pack WORK into BP in a variant of uleb format. */ | |
32 | ||
33 | void | |
34 | bp_pack_var_len_unsigned (struct bitpack_d *bp, unsigned HOST_WIDE_INT work) | |
35 | { | |
36 | do | |
37 | { | |
38 | unsigned int half_byte = (work & 0x7); | |
39 | work >>= 3; | |
40 | if (work != 0) | |
41 | /* More half_bytes to follow. */ | |
42 | half_byte |= 0x8; | |
43 | ||
44 | bp_pack_value (bp, half_byte, 4); | |
45 | } | |
46 | while (work != 0); | |
47 | } | |
48 | ||
49 | ||
50 | /* Pack WORK into BP in a variant of sleb format. */ | |
51 | ||
52 | void | |
53 | bp_pack_var_len_int (struct bitpack_d *bp, HOST_WIDE_INT work) | |
54 | { | |
55 | int more, half_byte; | |
56 | ||
57 | do | |
58 | { | |
59 | half_byte = (work & 0x7); | |
60 | /* arithmetic shift */ | |
61 | work >>= 3; | |
62 | more = !((work == 0 && (half_byte & 0x4) == 0) | |
63 | || (work == -1 && (half_byte & 0x4) != 0)); | |
64 | if (more) | |
65 | half_byte |= 0x8; | |
66 | ||
67 | bp_pack_value (bp, half_byte, 4); | |
68 | } | |
69 | while (more); | |
70 | } | |
71 | ||
72 | ||
73 | /* Unpack VAL from BP in a variant of uleb format. */ | |
74 | ||
75 | unsigned HOST_WIDE_INT | |
76 | bp_unpack_var_len_unsigned (struct bitpack_d *bp) | |
77 | { | |
78 | unsigned HOST_WIDE_INT result = 0; | |
79 | int shift = 0; | |
80 | unsigned HOST_WIDE_INT half_byte; | |
81 | ||
82 | while (true) | |
83 | { | |
84 | half_byte = bp_unpack_value (bp, 4); | |
85 | result |= (half_byte & 0x7) << shift; | |
86 | shift += 3; | |
87 | if ((half_byte & 0x8) == 0) | |
88 | return result; | |
89 | } | |
90 | } | |
91 | ||
92 | ||
93 | /* Unpack VAL from BP in a variant of sleb format. */ | |
94 | ||
95 | HOST_WIDE_INT | |
96 | bp_unpack_var_len_int (struct bitpack_d *bp) | |
97 | { | |
98 | HOST_WIDE_INT result = 0; | |
99 | int shift = 0; | |
100 | unsigned HOST_WIDE_INT half_byte; | |
101 | ||
102 | while (true) | |
103 | { | |
104 | half_byte = bp_unpack_value (bp, 4); | |
105 | result |= (half_byte & 0x7) << shift; | |
106 | shift += 3; | |
107 | if ((half_byte & 0x8) == 0) | |
108 | { | |
109 | if ((shift < HOST_BITS_PER_WIDE_INT) && (half_byte & 0x4)) | |
4176084b | 110 | result |= - (HOST_WIDE_INT_1U << shift); |
f0efc7aa DN |
111 | |
112 | return result; | |
113 | } | |
114 | } | |
115 | } | |
6e552ec2 AH |
116 | |
117 | /* Pack REAL_VALUE_TYPE R into BP. */ | |
118 | ||
119 | void | |
120 | bp_pack_real_value (struct bitpack_d *bp, const REAL_VALUE_TYPE *r) | |
121 | { | |
122 | bp_pack_value (bp, r->cl, 2); | |
123 | bp_pack_value (bp, r->decimal, 1); | |
124 | bp_pack_value (bp, r->sign, 1); | |
125 | bp_pack_value (bp, r->signalling, 1); | |
126 | bp_pack_value (bp, r->canonical, 1); | |
127 | bp_pack_value (bp, r->uexp, EXP_BITS); | |
128 | for (unsigned i = 0; i < SIGSZ; i++) | |
129 | bp_pack_value (bp, r->sig[i], HOST_BITS_PER_LONG); | |
130 | } | |
131 | ||
132 | /* Unpack REAL_VALUE_TYPE R from BP. */ | |
133 | ||
134 | void | |
135 | bp_unpack_real_value (struct bitpack_d *bp, REAL_VALUE_TYPE *r) | |
136 | { | |
137 | /* Clear all bits of the real value type so that we can later do | |
138 | bitwise comparisons to see if two values are the same. */ | |
139 | memset (r, 0, sizeof (*r)); | |
140 | r->cl = (unsigned) bp_unpack_value (bp, 2); | |
141 | r->decimal = (unsigned) bp_unpack_value (bp, 1); | |
142 | r->sign = (unsigned) bp_unpack_value (bp, 1); | |
143 | r->signalling = (unsigned) bp_unpack_value (bp, 1); | |
144 | r->canonical = (unsigned) bp_unpack_value (bp, 1); | |
145 | r->uexp = (unsigned) bp_unpack_value (bp, EXP_BITS); | |
146 | for (unsigned i = 0; i < SIGSZ; i++) | |
147 | r->sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG); | |
148 | } |