Article View: comp.bugs.2bsd
Article #51screwy opcodes in 'as' overlooked (#71)
From: Steven M. Schultz
Date: Fri, 28 Aug 1992 06:05
Date: Fri, 28 Aug 1992 06:05
236 lines
4595 bytes
4595 bytes
Subject: screwy opcodes in 'as' overlooked (#71)
Index: bin/as/{as12,as14,as17,as22,as27}.s 2.11BSD
Description:
When several of the obsolete/deprecated/oddball opcodes were
removed from the assembler the usage of these in the assembler
itself was overlooked (the compiler never generates them).
Repeat-By:
Attempt to assemble the assembler. Note the errors on
'dvd', 'mpy' and 'als'. Changing these to 'div', 'mul' and 'ash'
fixes the problem.
Fix:
Apply the patch below and reinstall the assembler. Both the old
and new assemblers recognize the "standard" opcodes, there wasn't
any risk of the assembler not being able to reconstitute itself.
=========================cut here===============================
*** /usr/src/bin/as/as12.s.old Wed Dec 13 16:43:06 1989
--- /usr/src/bin/as/as12.s Thu Aug 27 20:40:36 1992
***************
*** 26,32 ****
mov $4,r1
2:
clr r2
! dvd $10.,r2
add $'0,r3
movb r3,-(r0)
mov r2,r3
--- 26,32 ----
mov $4,r1
2:
clr r2
! div $10.,r2
add $'0,r3
movb r3,-(r0)
mov r2,r3
*** /usr/src/bin/as/as14.s.old Wed Dec 13 16:43:14 1989
--- /usr/src/bin/as/as14.s Thu Aug 27 20:41:07 1992
***************
*** 146,154 ****
cmp r0,$'9
bgt 1f
sub $'0,r0
! mpy $10.,r5
add r0,r5
! als $3,r1
add r0,r1
br 1b
1:
--- 146,154 ----
cmp r0,$'9
bgt 1f
sub $'0,r0
! mul $10.,r5
add r0,r5
! ash $3,r1
add r0,r1
br 1b
1:
*** /usr/src/bin/as/as17.s.old Wed Dec 13 16:43:25 1989
--- /usr/src/bin/as/as17.s Thu Aug 27 20:41:43 1992
***************
*** 143,149 ****
exlsh:
clr r5
jsr pc,combin
! als r1,r2
br eoprnd
exmod:
--- 143,149 ----
exlsh:
clr r5
jsr pc,combin
! ash r1,r2
br eoprnd
exmod:
***************
*** 152,158 ****
mov r1,-(sp)
mov r2,r1
clr r0
! dvd (sp)+,r0
mov r1,r2
br eoprnd
--- 152,158 ----
mov r1,-(sp)
mov r2,r1
clr r0
! div (sp)+,r0
mov r1,r2
br eoprnd
***************
*** 184,190 ****
exmul:
clr r5
jsr pc,combin
! mpy r2,r1
mov r1,r2
br eoprnd
--- 184,190 ----
exmul:
clr r5
jsr pc,combin
! mul r2,r1
mov r1,r2
br eoprnd
***************
*** 194,200 ****
mov r1,-(sp)
mov r2,r1
clr r0
! dvd (sp)+,r0
mov r0,r2
br eoprnd
--- 194,200 ----
mov r1,-(sp)
mov r2,r1
clr r0
! div (sp)+,r0
mov r0,r2
br eoprnd
*** /usr/src/bin/as/as22.s.old Sun Dec 24 16:53:18 1989
--- /usr/src/bin/as/as22.s Thu Aug 27 20:42:41 1992
***************
*** 144,150 ****
mov $4,r1
2:
clr r2
! dvd $10.,r2
add $'0,r3
movb r3,-(r0)
mov r2,r3
--- 144,150 ----
mov $4,r1
2:
clr r2
! div $10.,r2
add $'0,r3
movb r3,-(r0)
mov r2,r3
*** /usr/src/bin/as/as27.s.old Sun Dec 24 21:29:19 1989
--- /usr/src/bin/as/as27.s Thu Aug 27 20:43:23 1992
***************
*** 159,165 ****
exlsh:
mov $relte2,r5
jsr pc,combin
! als r1,r2
br eoprnd
exmod:
--- 159,165 ----
exlsh:
mov $relte2,r5
jsr pc,combin
! ash r1,r2
br eoprnd
exmod:
***************
*** 168,174 ****
mov r3,r0
mov r2,r3
clr r2
! dvd r1,r2
mov r3,r2
mov r0,r3
br eoprnd
--- 168,174 ----
mov r3,r0
mov r2,r3
clr r2
! div r1,r2
mov r3,r2
mov r0,r3
br eoprnd
***************
*** 201,207 ****
exmul:
mov $relte2,r5
jsr pc,combin
! mpy r2,r1
mov r1,r2
br eoprnd
--- 201,207 ----
exmul:
mov $relte2,r5
jsr pc,combin
! mul r2,r1
mov r1,r2
br eoprnd
***************
*** 211,217 ****
mov r3,r0
mov r2,r3
clr r2
! dvd r1,r2
mov r0,r3
br eoprnd
--- 211,217 ----
mov r3,r0
mov r2,r3
clr r2
! div r1,r2
mov r0,r3
br eoprnd
***************
*** 258,264 ****
clr maxtyp
jsr pc,maprel
mov r0,r1
! mpy $6,r1
mov r3,r0
jsr pc,maprel
add r5,r0
--- 258,264 ----
clr maxtyp
jsr pc,maprel
mov r0,r1
! mul $6,r1
mov r3,r0
jsr pc,maprel
add r5,r0
Technical Details
Message-ID:
<1992Aug28.060543.12313@wlbr.iipo.gtegsc.com>Path:
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Complete Article Headers
Newsgroups: comp.bugs.2bsd Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!awds.imsd.contel.com!wlbr!sms From: sms@WLV.IIPO.GTEGSC.COM (Steven M. Schultz) Subject: screwy opcodes in 'as' overlooked (#71) Message-ID: <1992Aug28.060543.12313@wlbr.iipo.gtegsc.com> Sender: news@wlbr.iipo.gtegsc.com (news) Nntp-Posting-Host: wlv.iipo.gtegsc.com Organization: GTE Government Systems Date: Fri, 28 Aug 92 06:05:43 GMT Lines: 236