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79 lines
2.3 KiB
79 lines
2.3 KiB
use crate::data::{
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Wr, Rd,
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literal::Label,
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literal::RoutineName,
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literal::DebugMsg,
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};
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use crate::instr::{Cond};
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/// A higher level simple opration
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#[derive(Clone, Debug, Eq, PartialEq)]
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pub enum HLOp {
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/// Mark a jump target.
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Label(Label),
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/// Jump to a label
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Jump(Label),
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/// Jump to a label if a flag is set
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JumpIf(Cond, Label),
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/// Low level op
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L(Op),
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}
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/// A low level instruction
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#[derive(Clone, Debug, Eq, PartialEq)]
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pub enum Op {
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/// Do nothing
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Nop,
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/// Mark a far jump target (can be jumped to from another routine).
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/// This label is preserved in optimized code.
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FarLabel(Label),
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/// Jump to a label that can be in another function
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FarJump(Label),
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/// Call a routine with arguments.
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/// The arguments are passed as argX. Return values are stored in resX registers.
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Call(RoutineName, Vec<Rd>),
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/// Exit the current routine with return values
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Ret(Vec<Rd>),
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/// Mark a routine entry point (call target).
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/// Kept in the low level instruction file for position-independent code
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Routine(RoutineName),
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/// Skip backward or forward
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Skip(Rd),
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/// Skip if a flag is set
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SkipIf(Cond, Rd),
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/// Deny jumps, skips and run across this address, producing a run-time fault with a message.
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Barrier(Option<DebugMsg>),
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/// Generate a run-time fault with a debugger message
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Fault(Option<DebugMsg>),
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Move { dst: Wr, src: Rd },
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Test { a: Rd },
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Compare { a: Rd, b: Rd },
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StoreStatus { dst: Wr },
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LoadStatus { src: Rd },
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Add { dst: Wr, a: Rd, b: Rd },
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Sub { dst: Wr, a: Rd, b: Rd },
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Mul { dst: Wr, a: Rd, b: Rd },
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Div { dst: Wr, rem: Wr, a: Rd, div: Rd },
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// "Mod" is functionally equivalent to "Div" with the result discarded,
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// but status flags are updated by the remainder
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Mod { dst: Wr, a: Rd, div: Rd },
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And { dst: Wr, a: Rd, b: Rd },
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Or { dst: Wr, a: Rd, b: Rd },
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Xor { dst: Wr, a: Rd, b: Rd },
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Cpl { dst: Wr, a: Rd },
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Rol { dst: Wr, a: Rd, n: Rd }, // Rotate (with wrap-around)
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Ror { dst: Wr, a: Rd, n: Rd },
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Lsl { dst: Wr, a: Rd, n: Rd }, // Shift
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Lsr { dst: Wr, a: Rd, n: Rd },
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Asr { dst: Wr, a: Rd, n: Rd },
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}
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/// Make "into" work
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impl From<Op> for HLOp {
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fn from(op: Op) -> Self {
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HLOp::L(op)
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}
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}
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