use super::{InlineAsmArch, InlineAsmType};
use rustc_macros::HashStable_Generic;
use rustc_span::Symbol;
use std::fmt;
def_reg_class! {
Bpf BpfInlineAsmRegClass {
reg,
wreg,
}
}
impl BpfInlineAsmRegClass {
pub fn valid_modifiers(self, _arch: 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, I64; },
Self::wreg => types! { alu32: I8, I16, I32; },
}
}
}
def_regs! {
Bpf BpfInlineAsmReg BpfInlineAsmRegClass {
r0: reg = ["r0"],
r1: reg = ["r1"],
r2: reg = ["r2"],
r3: reg = ["r3"],
r4: reg = ["r4"],
r5: reg = ["r5"],
r6: reg = ["r6"],
r7: reg = ["r7"],
r8: reg = ["r8"],
r9: reg = ["r9"],
w0: wreg = ["w0"],
w1: wreg = ["w1"],
w2: wreg = ["w2"],
w3: wreg = ["w3"],
w4: wreg = ["w4"],
w5: wreg = ["w5"],
w6: wreg = ["w6"],
w7: wreg = ["w7"],
w8: wreg = ["w8"],
w9: wreg = ["w9"],
#error = ["r10", "w10"] =>
"the stack pointer cannot be used as an operand for inline asm",
}
}
impl BpfInlineAsmReg {
pub fn emit(
self,
out: &mut dyn fmt::Write,
_arch: InlineAsmArch,
_modifier: Option<char>,
) -> fmt::Result {
out.write_str(self.name())
}
pub fn overlapping_regs(self, mut cb: impl FnMut(BpfInlineAsmReg)) {
cb(self);
macro_rules! reg_conflicts {
(
$(
$r:ident : $w:ident
),*
) => {
match self {
$(
Self::$r => {
cb(Self::$w);
}
Self::$w => {
cb(Self::$r);
}
)*
}
};
}
reg_conflicts! {
r0 : w0,
r1 : w1,
r2 : w2,
r3 : w3,
r4 : w4,
r5 : w5,
r6 : w6,
r7 : w7,
r8 : w8,
r9 : w9
}
}
}