COMPRESS.EXE
!
! Note: The following patches replace inline calls to LIB$INSV and LIB$EXTZV
!	with the actual single instructions that is contained in these
!	routines.  The offsets were derived by compiling COMPRESS.C and 
!	ARGPROC.C with the VAX C Compiler Version 3.1, and linking with the
!	standard sharable VAXCRTL.EXE supplied with VMS V5.3.  The effect of
!	these patches on the execution of the compress program was about 5%
!	less CPU time.  Some might not consider this extra benefit worth it,
!	I've done all the work, so if the patch applies (i.e. the correct
!	instructions are at the right spots in the image, then it's worth
!	using.
!
REPLACE/INS 86A54+4A		! This is output + 4a
'PUSHL R2'
'PUSHAL B^0F4(FP)'
'PUSHAL B^0F8(FP)'
'PUSHAL B^04(AP)'
'CALLS #04,@L^88524'
EXIT
'INSV B^4(AP),B^0F8(FP),B^0F4(FP),(R2)'
EXIT
REPLACE/INS 86F00+1DA		! This is getcode + 1DA
'PUSHL (SP)'
'PUSHAL B^0F4(FP)'
'PUSHAL W^0FFF8(FP)'
'CALLS #3,@L^88520'
EXIT
'MOVL	(SP),R0'
'EXTZV B^0F8(FP),B^0F4(FP),(R0),R0'
EXIT
UPDATE