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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2021-2022. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/**
* @description Basic type representation for BEAM instruction operands.
* @file beam_types.h
*
* While the compiler is good eliminating redundant type tests and simplifying
* instructions, we're limited by the available instructions and it's not
* always worthwhile to add new variants.
*
* The idea behind this module is to allow minor optimizations _inside_
* instructions based on what we know about their operand types. For example,
* when we know that the source passed to `is_tagged_tuple` is always boxed, we
* can skip the boxed check.
*/
#ifndef _BEAM_TYPES_H
#define _BEAM_TYPES_H
#include "sys.h"
#define BEAM_TYPES_VERSION 1
#define BEAM_TYPE_NONE (0)
#define BEAM_TYPE_ATOM (1 << 0)
#define BEAM_TYPE_BITSTRING (1 << 1)
#define BEAM_TYPE_BS_MATCHSTATE (1 << 2)
#define BEAM_TYPE_CONS (1 << 3)
#define BEAM_TYPE_FLOAT (1 << 4)
#define BEAM_TYPE_FUN (1 << 5)
#define BEAM_TYPE_INTEGER (1 << 6)
#define BEAM_TYPE_MAP (1 << 7)
#define BEAM_TYPE_NIL (1 << 8)
#define BEAM_TYPE_PID (1 << 9)
#define BEAM_TYPE_PORT (1 << 10)
#define BEAM_TYPE_REFERENCE (1 << 11)
#define BEAM_TYPE_TUPLE (1 << 12)
#define BEAM_TYPE_ANY ((1 << 13) - 1)
#define BEAM_TYPE_MASK_BOXED \
(BEAM_TYPE_BITSTRING | \
BEAM_TYPE_BS_MATCHSTATE | \
BEAM_TYPE_FLOAT | \
BEAM_TYPE_FUN | \
BEAM_TYPE_INTEGER | \
BEAM_TYPE_MAP | \
BEAM_TYPE_PID | \
BEAM_TYPE_PORT | \
BEAM_TYPE_REFERENCE | \
BEAM_TYPE_TUPLE)
#define BEAM_TYPE_MASK_IMMEDIATE \
(BEAM_TYPE_ATOM | \
BEAM_TYPE_INTEGER | \
BEAM_TYPE_NIL | \
BEAM_TYPE_PID | \
BEAM_TYPE_PORT)
#define BEAM_TYPE_MASK_CELL \
(BEAM_TYPE_CONS)
#define BEAM_TYPE_MASK_ALWAYS_IMMEDIATE \
(BEAM_TYPE_MASK_IMMEDIATE & ~(BEAM_TYPE_MASK_BOXED | BEAM_TYPE_MASK_CELL))
#define BEAM_TYPE_MASK_ALWAYS_BOXED \
(BEAM_TYPE_MASK_BOXED & ~(BEAM_TYPE_MASK_CELL | BEAM_TYPE_MASK_IMMEDIATE))
#define BEAM_TYPE_MASK_ALWAYS_CELL \
(BEAM_TYPE_MASK_CELL & ~(BEAM_TYPE_MASK_BOXED | BEAM_TYPE_MASK_IMMEDIATE))
typedef struct {
/** @brief A set of the possible types (atom, tuple, etc) this term may
* be. When a single bit is set, the term will always be of that type. */
int type_union;
/** @brief Minimum and maximum values. Only valid if min <= max. */
Sint64 min;
Sint64 max;
} BeamType;
int beam_types_decode(const byte *data, Uint size, BeamType *out);
#endif
|
