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7-sources/cmplno.mac
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TITLE CMPLNO - COMPARE LINE NUMBERS ROUTINE FOR EDT
; IDENT 1-001
;AUTHOR : GRAHAM BEECH CREATION DATE : 11-FEB-1983
;******************************************************************************
;* *
;* COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATIO 1978, 1988 ALL RIGHTS RESERVED.*
;* *
;* THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED *
;* ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE *
;* INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER *
;* COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY *
;* OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY *
;* TRANSFERRED. *
;* *
;* THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE *
;* AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT *
;* CORPORATION. *
;* *
;* DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS *
;* SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL. *
;* *
;******************************************************************************
;
;FACILITY: EDT VERSION 3
;
;FUNCTIONAL DESCRIPTION:
;
; THIS MODULE CONTAINS THE ROUTINE TO COMPARE 54-BIT LINE
; NUMBERS USED BY EDT VERSION 3.
;
;MODIFIED BY:
;
; 1-001 ORIGINAL. GB 11-Feb-1983
;--
; THE ROUTINE IS CALLED BY THE FOLLOWING INTERFACE, TWO SOURCE PARAMETERS
; EACH OF WHICH IS THE ADDRESS OF A 54-BIT UNSIGNED INTEGER.
;
SALL
TWOSEG
RELOC 400000
;
; TABLE OF CONTENTS:
;
INTERN CMPLNO
;
; INCLUDE FILES:
;
SEARCH MACSYM
SEARCH MONSYM
; DEFINITIONS
T1=1
T2=2
T3=3
T4=4
P=17
;
; FORMAL PARAMTERS
;
; P1 POINTER TO SOURCE1
; P2 POINTER TO SOURCE2
;-
CMPLNO::
MOVE T1,-1(P) ;PTR TO FIRST LINE NO.
MOVE T2,-2(P) ;PTR TO SECOND LINE NO.
HRRZ T3,1(T2) ;GET HI OF LINE 2
HRRZ T4,1(T1) ;AND HI OF LINE 1
CAIGE T3,(T4) ;LINE 2 < LINE 1?
JRST LT ;YES.
CAIE T3,(T4) ;EQUAL?
JRST GT ;NO. MUST >
HLRZ T3,(T2) ;GET MD OF LINE 2
HLRZ T4,(T1) ;GET MD OF LINE 1
CAIGE T3,(T4) ;LINE 2 < LINE 1?
JRST LT ;YES.
CAIE T3,(T4) ;EQUAL?
JRST GT ;NO. MUST >
HRRZ T3,(T2) ;GET LO OF LINE 1
HRRZ T4,(T1) ;GET LO OF LINE 2
CAIGE T3,(T4) ;LINE 2 < LINE 1?
JRST LT ;YES.
CAIN T3,(T4) ;EQUAL?
SKIPA T1,[0] ;YES. LINE2 = LINE1
GT: MOVEI T1,1 ;LINE2 > LINE1
RET
LT: SETO T1, ;LINE2 < LINE1
RET
END