cranelift-codegen 0.112.2

Low-level code generator library
Documentation 
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

//! Riscv64 ISA definitions: registers.
//!

use crate::machinst::{Reg, Writable};

use alloc::vec;
use alloc::vec::Vec;

use regalloc2::{PReg, RegClass, VReg};

// first argument of function call
#[inline]
pub fn a0() -> Reg {
    x_reg(10)
}

// second argument of function call
#[inline]
#[allow(dead_code)]
pub fn a1() -> Reg {
    x_reg(11)
}

// third argument of function call
#[inline]
#[allow(dead_code)]
pub fn a2() -> Reg {
    x_reg(12)
}

#[inline]
#[allow(dead_code)]
pub fn writable_a0() -> Writable<Reg> {
    Writable::from_reg(a0())
}
#[inline]
#[allow(dead_code)]
pub fn writable_a1() -> Writable<Reg> {
    Writable::from_reg(a1())
}
#[inline]
#[allow(dead_code)]
pub fn writable_a2() -> Writable<Reg> {
    Writable::from_reg(a2())
}

#[inline]
#[allow(dead_code)]
pub fn fa0() -> Reg {
    f_reg(10)
}
#[inline]
#[allow(dead_code)]
pub fn writable_fa0() -> Writable<Reg> {
    Writable::from_reg(fa0())
}
#[inline]
#[allow(dead_code)]
pub fn writable_fa1() -> Writable<Reg> {
    Writable::from_reg(fa1())
}
#[inline]
pub fn fa1() -> Reg {
    f_reg(11)
}

/// Get a reference to the zero-register.
#[inline]
pub fn zero_reg() -> Reg {
    x_reg(0)
}

/// Get a writable reference to the zero-register (this discards a result).
#[inline]
pub fn writable_zero_reg() -> Writable<Reg> {
    Writable::from_reg(zero_reg())
}
#[inline]
pub fn stack_reg() -> Reg {
    x_reg(2)
}

/// Get a writable reference to the stack-pointer register.
#[inline]
pub fn writable_stack_reg() -> Writable<Reg> {
    Writable::from_reg(stack_reg())
}

/// Get a reference to the link register (x1).
pub fn link_reg() -> Reg {
    x_reg(1)
}

/// Get a writable reference to the link register.
#[inline]
pub fn writable_link_reg() -> Writable<Reg> {
    Writable::from_reg(link_reg())
}

/// Get a reference to the frame pointer (x8).
#[inline]
pub fn fp_reg() -> Reg {
    x_reg(8)
}

/// Get a writable reference to the frame pointer.
#[inline]
pub fn writable_fp_reg() -> Writable<Reg> {
    Writable::from_reg(fp_reg())
}

/// Get a reference to the first temporary, sometimes "spill temporary",
/// register. This register is used in various ways as a temporary.
#[inline]
pub fn spilltmp_reg() -> Reg {
    x_reg(31)
}

/// Get a writable reference to the spilltmp reg.
#[inline]
pub fn writable_spilltmp_reg() -> Writable<Reg> {
    Writable::from_reg(spilltmp_reg())
}

///spilltmp2
#[inline]
pub fn spilltmp_reg2() -> Reg {
    x_reg(30)
}

/// Get a writable reference to the spilltmp2 reg.
#[inline]
pub fn writable_spilltmp_reg2() -> Writable<Reg> {
    Writable::from_reg(spilltmp_reg2())
}

#[inline]
pub fn x_reg(enc: usize) -> Reg {
    let p_reg = PReg::new(enc, RegClass::Int);
    let v_reg = VReg::new(p_reg.index(), p_reg.class());
    Reg::from(v_reg)
}
pub const fn px_reg(enc: usize) -> PReg {
    PReg::new(enc, RegClass::Int)
}

#[inline]
pub fn f_reg(enc: usize) -> Reg {
    let p_reg = PReg::new(enc, RegClass::Float);
    let v_reg = VReg::new(p_reg.index(), p_reg.class());
    Reg::from(v_reg)
}
pub const fn pf_reg(enc: usize) -> PReg {
    PReg::new(enc, RegClass::Float)
}

#[allow(dead_code)]
pub(crate) fn x_reg_range(start: usize, end: usize) -> Vec<Writable<Reg>> {
    let mut regs = vec![];
    for i in start..=end {
        regs.push(Writable::from_reg(x_reg(i)));
    }
    regs
}

pub const fn pv_reg(enc: usize) -> PReg {
    PReg::new(enc, RegClass::Vector)
}