Elmo HARmonica, HARSFEN0602 Rsltand Logical and Operator, Rsltb Relational Operator, Sp Sp

HARSFEN0602ElmoHARmonicaSoftwareManual PRELIMINARYDRAFT

7.7.25RSLTAND – Logical AND Operator (&&)

Purpose:

If both numbers are non-zero condition is true. Otherwise it is false (numbers are at top two entries of the stack).

	Algorithm:
	(SP-1) && (SP) (SP-1)
	SP	SP – 1
	Attributes
	Attribute			Value		Comment
	Op code					May change in future
						versions
	Number of arguments			None
	Argument types		→	N.A.		Both arguments types must
						be integer (set according to
						stack members flags)
	Addressing modes			Absent
	→
	Promotion			N.A.
	Output type			Int && Int	Int
	Imposes end of line			No
7.7.26		RSLTB – Relational Operator (<)

Purpose:

Compare two numbers, if the first number is smaller condition is true otherwise it’s false (numbers are at top two entries of the stack) .

Algorithm:			→
((SP-1) < (SP))	(SP)
SP SP - 1
Attributes
Attribute		Value		Comment
Op code				May change in future
				versions
Number of arguments		None
Argument types	→	N.A.		Both arguments types are set
→				according to stack members
				flags
Addressing modes		Absent
Promotion		N.A.
Output type		Int		Compare result is always
				integer
Imposes end of line		No

86

7.7.27RSLTBE – Relational Operator (<=)

Purpose:

Compare two numbers, if the first number is smaller or they are equal condition is true otherwise it’s false (numbers are at top two entries of the stack) .

Algorithm:
((SP-1) <=	(SP))	(SP)
SP SP -	1	→
Attributes→