forked from AbleOS/holey-bytes
66 lines
1.5 KiB
Rust
66 lines
1.5 KiB
Rust
#![no_std]
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#![feature(error_in_core)]
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extern crate alloc;
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pub mod text;
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mod macros;
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use {alloc::vec::Vec, hashbrown::HashSet};
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#[derive(Default)]
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pub struct Assembler {
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pub buf: Vec<u8>,
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sub: HashSet<usize>,
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}
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impl Assembler {
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macros::impl_asm!(
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bbbb(p0: u8, p1: u8, p2: u8, p3: u8)
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=> [DIR, DIRF, FMAF],
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bbb(p0: u8, p1: u8, p2: u8)
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=> [ADD, SUB, MUL, AND, OR, XOR, SL, SR, SRS, CMP, CMPU, BRC, ADDF, SUBF, MULF],
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bbdh(p0: u8, p1: u8, p2: impl Imm, p3: u16)
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=> [LD, ST],
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bbd(p0: u8, p1: u8, p2: impl Imm)
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=> [ADDI, MULI, ANDI, ORI, XORI, SLI, SRI, SRSI, CMPI, CMPUI,
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BMC, JEQ, JNE, JLT, JGT, JLTU, JGTU, ADDFI, MULFI],
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bb(p0: u8, p1: u8)
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=> [NEG, NOT, CP, SWA, NEGF, ITF, FTI],
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bd(p0: u8, p1: impl Imm)
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=> [LI, JMP],
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n()
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=> [NOP, ECALL],
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);
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}
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pub trait Imm {
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fn insert(&self, asm: &mut Assembler);
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}
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macro_rules! impl_imm_le_bytes {
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($($ty:ty),* $(,)?) => {
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$(
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impl Imm for $ty {
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#[inline(always)]
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fn insert(&self, asm: &mut Assembler) {
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asm.buf.extend(self.to_le_bytes());
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}
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}
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)*
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};
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}
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impl_imm_le_bytes!(u64, i64, f64);
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub struct Symbol(pub u64);
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impl Imm for Symbol {
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#[inline(always)]
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fn insert(&self, asm: &mut Assembler) {
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asm.sub.insert(asm.buf.len());
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asm.buf.extend(self.0.to_le_bytes());
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}
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}
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