Compaq ECQD2KCTE manual Case, Div, Loadlocked

Table 3–7: Operators (Continued)

Operator	Meaning
CASE	The CASE construct selects one of several actions based
	on the value of its argument. The form of a case is:
	CASE argument OF
	argvalue1: action_1
	argvalue2: action_2
	...
	argvaluen:action_n
	[otherwise: default_action]
	ENDCASE
	If the value of argument is argvalue1 then action_1 is exe-
	cuted; if argument = argvalue2, then action_2 is executed,
	and so forth.
	Once a single action is executed, the code stream breaks
	to the ENDCASE (there is an implicit break as in Pascal).
	Each action may nonetheless be a sequence of
	pseudocode operations, one operation per line.
	Optionally, the last argvalue may be the atom ‘otherwise’.
	The associated default action will be taken if none of the
	other argvalues match the argument.
DIV	Integer division (truncates)
LEFT_SHIFT(x,y)	Logical left shift of first operand by the second operand.Y
	is an unsigned shift value. Zeros are moved into the
	vacated bit positions, and shifted out bits are discarded.
LOAD_LOCKED	The processor records the target physical address in a per-
	processor locked_physical_address register and sets the
	per-processor lock_flag.
lg	Log to the base 2.
MAP_x	F_float or S_float memory-to-register exponent mapping
	function.
MAXS(x,y)	Returns the larger of x and y, with x and y interpreted as
	signed integers.
MAXU(x,y)	Returns the larger of x and y, with x and y interpreted as
	unsigned integers.
MINS(x,y)	Returns the smaller of x and y, with x and y interpreted as
	signed integers.
MINU(x,y)	Returns the smaller of x and y, with x and y interpreted as
	unsigned integers.
x MOD y	x modulo y

3–8Alpha Architecture Handbook