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- Newsgroups: comp.bugs.2bsd
- Path: 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
-
- 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
-