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fixed csb so that it also handles 0 cases

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ceriel
1988-03-16 19:38:14 +00:00
parent 2f11dce5ef
commit 0030ddd97f
2 changed files with 5 additions and 3 deletions
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5
mach/pdp/int/em_int.s
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@@ -2921,11 +2921,12 @@ csb.z: mov (sp)+,r0; br 1f;
csb.l: jsr pc,wrdoff;
1: sub $2,r0; jne e.illins;
csb.1W: mov (sp)+,r0; mov (sp)+,r1;
mov 2(r0),r5; mov r0,pcx;
mov r0,pcx; mov 2(r0),r5
/use pcx as ordinary register
ble 3f
2: add $4,r0; cmp (r0),r1;
beq 4f; sob r5,2b;
mov (pcx),pcx; jeq e.case; next
3: mov (pcx),pcx; jeq e.case; next
4: mov 2(r0),pcx; jeq e.case; next
rck.l: jsr pc,wrdoff; br 1f;