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\ ========== Copyright Header Begin ==========================================
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\ Hypervisor Software File: memtest.fth
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\ ========== Copyright Header End ============================================
id: @(#)memtest.fth 1.3 94/05/30
purpose: Fast memory test
copyright: Copyright 1992 Sun Microsystems, Inc. All Rights Reserved
headerless
code test-memory ( start-addr count -- obs-data exp-data fail-adr true | false )
tos scr move \ count in scr
sp 0 sc1 nget \ start in sc1
\ Backwards fill with 0
scr sc2 move
0 F: bra \ jump to the until branch
nop
begin
%g0 sc1 sc2 st
0 L:
sc2 4 sc2 subcc
0< until
nop \ Delay slot
\ Forward test for 0 and fill with -1
-1 sc4 set
%g0 sc2 move
0 F: bra \ jump to the until branch
nop
begin
sc1 sc2 sc3 ld
sc3 %g0 %g0 subcc
0<> if nop
-1 tos move \ fail
sp 2 /n* sp sub \ Make room on the stack
sc1 sc2 sc1 add \ failed address
sc1 sp 0 /n* nput \ failed adr
%g0 sp 1 /n* nput \ expected data
sc3 sp 2 /n* nput \ observed data
next \ exit
then
sc4 sc1 sc2 st
sc2 4 sc2 add
0 L:
scr sc2 %g0 subcc
0<= until
nop \ Delay slot
\ Backwards check for -1 and fill with 0
-1 sc4 set
scr sc2 move
0 F: bra \ jump to the until branch
nop
begin
sc1 sc2 sc3 ld
sc3 sc4 %g0 subcc
0<> if nop
-1 tos move \ fail
sc1 sc2 sc1 add \ failed address
sc1 sp 0 /n* nput
sc4 sp 1 /n* nput \ expected data
sc3 sp 2 /n* nput \ observed data
next \ exit
then
%g0 sc1 sc2 st
0 L:
sc2 4 sc2 subcc
0< until
nop \ Delay slot
0 tos move \ put false (=pass) on stack
sp /n sp add \ "
c;
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