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// Comparison Instructions
use crate::{MacroAssembler, Result};
use opcodes::Cancun as OpCode;
impl MacroAssembler {
/// Greater than or equal comparison.
///
/// a b ge -> a b-1 gt(lt)
///
/// Using lt due to order of stack.
pub fn _ge(&mut self) -> Result<()> {
self.push(&[1])?;
// NOTE: this is the overridden sub but not `self.asm.sub`
self._sub()?;
self.asm._lt()
}
/// Greater than or equal comparison.
///
/// a b sge -> a b-1 sgt(slt)
///
/// Using lt due to order of stack.
pub fn _sge(&mut self) -> Result<()> {
self.push(&[1])?;
// NOTE: this is the overridden sub but not `self.asm.sub`
self._sub()?;
self.asm._slt()
}
/// Greater than or equal comparison.
///
/// a b sge -> a b-1 sgt(slt)
///
/// Using lt due to order of stack.
pub fn _sle(&mut self) -> Result<()> {
self.push(&[1])?;
// NOTE: this is the overridden sub but not `self.asm.sub`
self._sub()?;
self.asm._slt()
}
/// Greater than or equal comparison.
///
/// a b le -> a b-1 lt(gt)
///
/// Using gt due to order of stack.
pub fn _le(&mut self) -> Result<()> {
self.push(&[1])?;
// NOTE: this is the overridden sub but not `self.asm.sub`
self._sub()?;
self.asm._lt()
}
/// Greater than and equal comparison.
///
/// Using slt due to order of stack.
pub fn _sgt(&mut self) -> Result<()> {
self.asm._slt()
}
/// Greater than comparison.
///
/// Using lt due to order of stack.
pub fn _gt(&mut self) -> Result<()> {
self.asm._lt()
}
/// less than comparison.
///
/// Using gt due to order of stack.
pub fn _lt(&mut self) -> Result<()> {
self.asm._gt()
}
/// less than or equal comparison.
///
/// Using gt due to order of stack.
pub fn _slt(&mut self) -> Result<()> {
self.asm._sgt()
}
/// Sign-agnostic compare unequal.
pub fn _ne(&mut self) -> Result<()> {
self.emit_op(OpCode::EQ)?;
self.emit_op(OpCode::ISZERO)?;
Ok(())
}
/// Simple not operator
pub fn _eqz(&mut self) -> Result<()> {
self.emit_op(OpCode::ISZERO)?;
Ok(())
}
}