56 lines
1.4 KiB
Rust
56 lines
1.4 KiB
Rust
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use std::fmt::{self, Display, Formatter};
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use super::{Instruction, InstructionBuilder, Operand, Operation};
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pub struct LessEqualByte {
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pub comparator: bool,
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pub left: Operand,
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pub right: Operand,
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}
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impl From<Instruction> for LessEqualByte {
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fn from(instruction: Instruction) -> Self {
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let comparator = instruction.d_field();
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let (left, right) = instruction.b_and_c_as_operands();
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LessEqualByte {
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comparator,
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left,
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right,
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}
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}
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}
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impl From<LessEqualByte> for Instruction {
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fn from(less_equal_byte: LessEqualByte) -> Self {
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let operation = Operation::LESS_EQUAL_BYTE;
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let (b_field, b_is_constant) = less_equal_byte.left.as_index_and_constant_flag();
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let (c_field, c_is_constant) = less_equal_byte.right.as_index_and_constant_flag();
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let d_field = less_equal_byte.comparator;
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InstructionBuilder {
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operation,
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b_field,
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c_field,
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d_field,
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b_is_constant,
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c_is_constant,
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..Default::default()
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}
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.build()
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}
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}
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impl Display for LessEqualByte {
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fn fmt(&self, f: &mut Formatter) -> fmt::Result {
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let LessEqualByte {
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comparator,
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left,
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right,
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} = self;
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let operator = if *comparator { "≤" } else { ">" };
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write!(f, "if {left} {operator} {right} {{ JUMP +1 }}")
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}
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}
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