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
use super::{InlineAsmArch, InlineAsmType};
use rustc_macros::HashStable_Generic;
use rustc_span::Symbol;
use std::fmt;

def_reg_class! {
    CSKY CSKYInlineAsmRegClass {
        reg,
        freg,
    }
}

impl CSKYInlineAsmRegClass {
    pub fn valid_modifiers(self, _arch: super::InlineAsmArch) -> &'static [char] {
        &[]
    }

    pub fn suggest_class(self, _arch: InlineAsmArch, _ty: InlineAsmType) -> Option<Self> {
        None
    }

    pub fn suggest_modifier(
        self,
        _arch: InlineAsmArch,
        _ty: InlineAsmType,
    ) -> Option<(char, &'static str)> {
        None
    }

    pub fn default_modifier(self, _arch: InlineAsmArch) -> Option<(char, &'static str)> {
        None
    }

    pub fn supported_types(
        self,
        _arch: InlineAsmArch,
    ) -> &'static [(InlineAsmType, Option<Symbol>)] {
        match self {
            Self::reg => types! { _: I8, I16, I32; },
            Self::freg => types! { _: F32; },
        }
    }
}

// The reserved registers are taken from <https://github.com/llvm/llvm-project/blob/main/llvm/lib/Target/CSKY/CSKYRegisterInfo.cpp#79>
def_regs! {
    CSKY CSKYInlineAsmReg CSKYInlineAsmRegClass {
        r0: reg = ["r0","a0"],
        r1: reg = ["r1","a1"],
        r2: reg = ["r2","a2"],
        r3: reg = ["r3","a3"],
        r4: reg = ["r4","l0"],
        r5: reg = ["r5","l1"],
        r6: reg = ["r6","l2"],
        r9: reg = ["r9","l5"],// feature e2
        r10: reg = ["r10","l6"],// feature e2
        r11: reg = ["r11","l7"],// feature e2
        r12: reg = ["r12","t0"],// feature e2
        r13: reg = ["r13","t1"],// feature e2
        r16: reg = ["r16","l8"],// feature high-register
        r17: reg = ["r17","l9"],// feature high-register
        r18: reg = ["r18","t2"],// feature high-register
        r19: reg = ["r19","t3"],// feature high-register
        r20: reg = ["r20","t4"],// feature high-register
        r21: reg = ["r21","t5"],// feature high-register
        r22: reg = ["r22","t6"],// feature high-register
        r23: reg = ["r23","t7", "fp"],// feature high-register
        r24: reg = ["r24","t8", "sop"],// feature high-register
        r25: reg = ["r25","t9","tp", "bsp"],// feature high-register
        f0: freg = ["fr0","vr0"],
        f1: freg = ["fr1","vr1"],
        f2: freg = ["fr2","vr2"],
        f3: freg = ["fr3","vr3"],
        f4: freg = ["fr4","vr4"],
        f5: freg = ["fr5","vr5"],
        f6: freg = ["fr6","vr6"],
        f7: freg = ["fr7","vr7"],
        f8: freg = ["fr8","vr8"],
        f9: freg = ["fr9","vr9"],
        f10: freg = ["fr10","vr10"],
        f11: freg = ["fr11","vr11"],
        f12: freg = ["fr12","vr12"],
        f13: freg = ["fr13","vr13"],
        f14: freg = ["fr14","vr14"],
        f15: freg = ["fr15","vr15"],
        f16: freg = ["fr16","vr16"],
        f17: freg = ["fr17","vr17"],
        f18: freg = ["fr18","vr18"],
        f19: freg = ["fr19","vr19"],
        f20: freg = ["fr20","vr20"],
        f21: freg = ["fr21","vr21"],
        f22: freg = ["fr22","vr22"],
        f23: freg = ["fr23","vr23"],
        f24: freg = ["fr24","vr24"],
        f25: freg = ["fr25","vr25"],
        f26: freg = ["fr26","vr26"],
        f27: freg = ["fr27","vr27"],
        f28: freg = ["fr28","vr28"],
        f29: freg = ["fr29","vr29"],
        f30: freg = ["fr30","vr30"],
        f31: freg = ["fr31","vr31"],
        #error = ["r7", "l3"] =>
            "the base pointer cannot be used as an operand for inline asm",
        #error = ["r8","l4"] =>
            "the frame pointer cannot be used as an operand for inline asm",
        #error = ["r14","sp"] =>
            "the stack pointer cannot be used as an operand for inline asm",
        #error = ["r15","lr"] =>
            "the link register cannot be used as an operand for inline asm",
        #error = ["r31","tls"] =>
            "reserver for tls",
        #error = ["r28", "gb", "rgb", "rdb"] =>
            "the global pointer cannot be used as an operand for inline asm",
        #error = ["r26","r27","r29","tb", "rtb", "r30","svbr"] =>
            "reserved by the ABI",
    }
}

impl CSKYInlineAsmReg {
    pub fn emit(
        self,
        out: &mut dyn fmt::Write,
        _arch: InlineAsmArch,
        _modifier: Option<char>,
    ) -> fmt::Result {
        out.write_str(self.name())
    }
}