Class: SyntaxTree::YARV::OptMinus

Inherits:
Object
  • Object
show all
Defined in:
lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

opt_minus is a specialization of the opt_send_without_block instruction that occurs when the - operator is used. There are fast paths for if both operands are integers or if both operands are floats. It pops both the receiver and the argument off the stack and pushes on the result.

### Usage

~~~ruby 3 - 2 ~~~

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(calldata) ⇒ OptMinus

Returns a new instance of OptMinus.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3343

def initialize(calldata)
  @calldata = calldata
end

Instance Attribute Details

#calldata ⇒ Object (readonly)

Returns the value of attribute calldata.



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3341

def calldata
  @calldata
end

Instance Method Details

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3371

def call(vm)
  canonical.call(vm)
end

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3367

def canonical
  Send.new(calldata, nil)
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3347

def disasm(fmt)
  fmt.instruction("opt_minus", [fmt.calldata(calldata)])
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3355

def length
  2
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3359

def pops
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3363

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 3351

def to_a(_iseq)
  [:opt_minus, calldata.to_h]
end