testb.s
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/************************************************************************
This RSP program implements Test B by Suk and Reddy 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)
bne $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
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)
sll $4, $4, 1
bne $4, $0, Step1a
nop
bne $1, $29, Step1
addi $1, $1, 0x0004
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)
or $2, $2, $4
sw $2, 0 ($1)
sll $4, $4, 1
bne $4, $0, Step2a
nop
bne $1, $29, Step2
addi $1, $1, 0x0004
ori $30, $0, 3
or $1, $29, $0
Step3: lui $4, 0x8000
Step3a:
lw $2, 0 ($1)
and $3, $2, $4
bne $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
xor $2, $2, $4
sw $2, 0 ($1)
xor $2, $2, $4
sw $2, 0 ($1)
srl $4, $4, 1
bne $4, $0, Step3a
nop
bne $1, $0, Step3
addi $1, $1, 0xFFFC
ori $30, $0, 4
or $1, $29, $0
Step4: lui $4, 0x8000
Step4a:
lw $2, 0 ($1)
and $3, $2, $4
beq $3, $4, Fail
xor $2, $2, $4
sw $2, 0 ($1)
xor $2, $2, $4
sw $2, 0 ($1)
srl $4, $4, 1
bne $4, $0, Step4a
nop
bne $1, $0, Step4
addi $1, $1, 0xFFFC
ori $1, $0, 0xFEED
Fail: break