cranelift_assembler_x64/
xmm.rs

1//! Xmm register operands; see [`Xmm`].
2
3use crate::{AsReg, CodeSink, rex::encode_modrm};
4
5/// An x64 SSE register (e.g., `%xmm0`).
6#[derive(Clone, Copy, Debug)]
7pub struct Xmm<R: AsReg = u8>(pub(crate) R);
8
9impl<R: AsReg> Xmm<R> {
10    /// Create a new [`Xmm`] register.
11    pub fn new(reg: R) -> Self {
12        Self(reg)
13    }
14
15    /// Return the register's hardware encoding; the underlying type `R` _must_
16    /// be a real register at this point.
17    ///
18    /// # Panics
19    ///
20    /// Panics if the register is not a valid Xmm register.
21    pub fn enc(&self) -> u8 {
22        let enc = self.0.enc();
23        assert!(enc < 16, "invalid register: {enc}");
24        enc
25    }
26
27    /// Return the register name.
28    pub fn to_string(&self) -> String {
29        self.0.to_string(None)
30    }
31
32    /// Emit this register as the `r/m` field of a ModR/M byte.
33    pub(crate) fn encode_modrm(&self, sink: &mut impl CodeSink, enc_reg: u8) {
34        sink.put1(encode_modrm(0b11, enc_reg & 0b111, self.enc() & 0b111));
35    }
36}
37
38impl<R: AsReg> AsRef<R> for Xmm<R> {
39    fn as_ref(&self) -> &R {
40        &self.0
41    }
42}
43
44impl<R: AsReg> AsMut<R> for Xmm<R> {
45    fn as_mut(&mut self) -> &mut R {
46        &mut self.0
47    }
48}
49
50impl<R: AsReg> From<R> for Xmm<R> {
51    fn from(reg: R) -> Xmm<R> {
52        Xmm(reg)
53    }
54}
55
56/// Encode xmm registers.
57pub mod enc {
58    pub const XMM0: u8 = 0;
59    pub const XMM1: u8 = 1;
60    pub const XMM2: u8 = 2;
61    pub const XMM3: u8 = 3;
62    pub const XMM4: u8 = 4;
63    pub const XMM5: u8 = 5;
64    pub const XMM6: u8 = 6;
65    pub const XMM7: u8 = 7;
66    pub const XMM8: u8 = 8;
67    pub const XMM9: u8 = 9;
68    pub const XMM10: u8 = 10;
69    pub const XMM11: u8 = 11;
70    pub const XMM12: u8 = 12;
71    pub const XMM13: u8 = 13;
72    pub const XMM14: u8 = 14;
73    pub const XMM15: u8 = 15;
74
75    /// Return the name of a XMM encoding (`enc`).
76    ///
77    /// # Panics
78    ///
79    /// This function will panic if the encoding is not a valid x64 register.
80    pub fn to_string(enc: u8) -> &'static str {
81        match enc {
82            XMM0 => "%xmm0",
83            XMM1 => "%xmm1",
84            XMM2 => "%xmm2",
85            XMM3 => "%xmm3",
86            XMM4 => "%xmm4",
87            XMM5 => "%xmm5",
88            XMM6 => "%xmm6",
89            XMM7 => "%xmm7",
90            XMM8 => "%xmm8",
91            XMM9 => "%xmm9",
92            XMM10 => "%xmm10",
93            XMM11 => "%xmm11",
94            XMM12 => "%xmm12",
95            XMM13 => "%xmm13",
96            XMM14 => "%xmm14",
97            XMM15 => "%xmm15",
98            _ => panic!("%invalid{enc}"),
99        }
100    }
101}
cranelift_assembler_x64/xmm.rs

cranelift_assembler_x64/
xmm.rs
