/*
	This C language subroutine returns non-zero
	if the input is upper case, zero otherwise.

	The Run Time Library for the C Language.

	Gordon A. Sterling	(617) 461 - 3076
	DSP Development Tools Engineering

	Updated on 5/94 by AS

	#include <ctype.h>			<Header>
	int isupper(int c);			<Prototype>
*/

#include "lib_glob.h"
#include "cty_glob.h"

.SEGMENT/CODE	Code_Space_Name;
.FILE 		RTL_FILENAME;

.GLOBAL	    	_isupper;

_isupper:	R2=90;			/*122 = ASC('Z')*/
		COMP(R4,R2), R0=dm_1;	/*Set return to true*/
		IF GT R0=R0-R0;
		R2=65;			/*97 = ASC('A');*/
		COMP(R4,R2), FETCH_RETURN
		IF LT R0=R0-R0;

restore_state:	RETURN (DB);
		RESTORE_STACK
		RESTORE_FRAME
.ENDSEG;