nta.s
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/************************************************************************
This RSP program implements the Nair, Thatte, and Abraham test
procedure for DMEM stuck-at and coupling faults.
************************************************************************/
.base 0x04001000
nor $31, $0, $0
ori $20, $0, 0x001F
ori $29, $0, 0x0FFC
ori $30, $0, 0
or $1, $0, $0
StepR: sw $0, 0 ($1)
beq $1, $29, StepR
addi $1, $1, 0x0004
ori $30, $0, 1
or $1, $0, $0
Step1: ori $4, $0, 1
Step1a:
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
sll $4, $4, 1
bne $4, $0, Step1a
nop
bne $1, $29, Step1
addi $1, $1, 0x0004
ori $1, $0, 0x0FFC
Step1b:
lw $2, 0 ($1)
bne $2, $31, Fail
nop
bne $1, $0, Step1b
addi $1, $1, 0xFFFC
ori $30, $0, 2
or $1, $0, $0
Step2: ori $4, $0, 1
Step2a:
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
sll $4, $4, 1
bne $4, $0, Step2a
nop
bne $1, $29, Step2
addi $1, $1, 0x0004
ori $1, $0, 0x0FFC
Step2b:
lw $2, 0 ($1)
bne $2, $0, Fail
nop
bne $1, $0, Step2b
addi $1, $1, 0xFFFC
ori $30, $0, 3
or $1, $29, $0
Step3: lui $4, 0x8000
Step3a:
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
srl $4, $4, 1
bne $4, $0, Step3a
nop
bne $1, $0, Step3
addi $1, $1, 0xFFFC
or $1, $0, $0
Step3b:
lw $2, 0 ($1)
bne $2, $31, Fail
nop
bne $1, $29, Step3b
addi $1, $1, 0x0004
ori $30, $0, 4
or $1, $29, $0
Step4: lui $4, 0x8000
Step4a:
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
srl $4, $4, 1
bne $4, $0, Step4a
nop
bne $1, $0, Step4
addi $1, $1, 0xFFFC
or $1, $0, $0
Step4b:
lw $2, 0 ($1)
bne $2, $0, Fail
nop
bne $1, $29, Step4b
addi $1, $1, 0x0004
ori $30, $0, 5
or $1, $0, $0
Step5: ori $4, $0, 1
Step5a:
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
nop
sll $4, $4, 1
bne $4, $0, Step5a
nop
bne $1, $29, Step5
addi $1, $1, 0x0004
ori $1, $0, 0x0FFC
Step5b:
lw $2, 0 ($1)
bne $2, $0, Fail
nop
bne $1, $0, Step5b
addi $1, $1, 0xFFFC
ori $30, $0, 6
or $1, $29, $0
Step6: lui $4, 0x8000
Step6a:
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
nop
srl $4, $4, 1
bne $4, $0, Step6a
nop
bne $1, $0, Step6
addi $1, $1, 0xFFFC
or $1, $0, $0
Step6b:
lw $2, 0 ($1)
bne $2, $0, Fail
nop
bne $1, $29, Step6b
addi $1, $1, 0x0004
or $1, $0, $0
StepS: sw $31, 0 ($1)
beq $1, $29, StepS
addi $1, $1, 0x0004
ori $30, $0, 7
or $1, $0, $0
Step7: ori $4, $0, 1
Step7a:
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
nop
sll $4, $4, 1
bne $4, $0, Step7a
nop
bne $1, $29, Step7
addi $1, $1, 0x0004
ori $1, $0, 0x0FFC
Step7b:
lw $2, 0 ($1)
bne $2, $31, Fail
nop
bne $1, $0, Step7b
addi $1, $1, 0xFFFC
ori $30, $0, 8
or $1, $29, $0
Step8: lui $4, 0x8000
Step8a:
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
or $2, $2, $4
sw $2, 0 ($1)
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
nop
srl $4, $4, 1
bne $4, $0, Step8a
nop
bne $1, $0, Step8
addi $1, $1, 0xFFFC
or $1, $0, $0
Step8b:
lw $2, 0 ($1)
bne $2, $31, Fail
nop
bne $1, $29, Step8b
addi $1, $1, 0x0004
ori $1, $0, 0xFEED
Fail: break