290 lines
7.3 KiB
NASM
290 lines
7.3 KiB
NASM
# All program code is placed after the
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# .text assembler directive
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.text
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# Declare main as a global function
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.globl main
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j main
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# code for sum
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sum:
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# Entering a new scope.
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# Symbols in symbol table:
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# println
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# x
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# i
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# sum
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# n
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# return
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# Update the stack pointer.
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addi $sp $sp -0
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t0 -16
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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li $t1 0
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# complete assignment statement with store
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sw $t1 0($t0)
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# Get sum's offset from $sp from the symbol table and initialize sum's address with it. We'll add $sp later.
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li $t0 -20
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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li $t1 0
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# complete assignment statement with store
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sw $t1 0($t0)
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datalabel0:
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t1 -16
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# Add the stack pointer address to the offset.
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add $t1 $t1 $sp
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# Load the value of i.
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lw $t0 0($t1)
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# Get n's offset from $sp from the symbol table and initialize n's address with it. We'll add $sp later.
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li $t2 -8
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of n.
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lw $t1 0($t2)
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slt $t0 $t0 $t1
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subi $t0 $t0 1
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bne $t0 $zero datalabel1
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# Entering a new scope.
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# Symbols in symbol table:
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# println
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# Update the stack pointer.
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addi $sp $sp -20
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# Get sum's offset from $sp from the symbol table and initialize sum's address with it. We'll add $sp later.
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li $t0 0
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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# Get sum's offset from $sp from the symbol table and initialize sum's address with it. We'll add $sp later.
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li $t2 0
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of sum.
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lw $t1 0($t2)
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# Get x's offset from $sp from the symbol table and initialize x's address with it. We'll add $sp later.
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li $t3 16
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# Add the stack pointer address to the offset.
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add $t3 $t3 $sp
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# Get x's base address from the stack.
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lw $t3 0($t3)
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# Evaluate the index expression and store in a register.
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t5 4
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# Add the stack pointer address to the offset.
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add $t5 $t5 $sp
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# Load the value of i.
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lw $t4 0($t5)
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# Multiply the index by -4.
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li $t5 4
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mul $t4 $t4 $t5
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# Add the index offset to the offset.
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add $t3 $t3 $t4
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# Load the value of x.
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lw $t2 0($t3)
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add $t1 $t1 $t2
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# complete assignment statement with store
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sw $t1 0($t0)
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t0 4
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t2 4
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of i.
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lw $t1 0($t2)
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li $t2 1
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add $t1 $t1 $t2
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# complete assignment statement with store
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sw $t1 0($t0)
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# Exiting scope.
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addi $sp $sp 20
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j datalabel0
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datalabel1:
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# Get sum's offset from $sp from the symbol table and initialize sum's address with it. We'll add $sp later.
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li $t1 -20
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# Add the stack pointer address to the offset.
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add $t1 $t1 $sp
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# Load the value of sum.
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lw $t0 0($t1)
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sw $t0 -12($sp)
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jr $ra
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# Exiting scope.
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addi $sp $sp 0
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jr $ra
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# code for main
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main:
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# Entering a new scope.
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# Symbols in symbol table:
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# a
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# println
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# i
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# return
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# Update the stack pointer.
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addi $sp $sp -0
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# println
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la $a0 datalabel2
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li $v0 4
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syscall
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la $a0 newline
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li $v0 4
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syscall
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t0 -44
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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li $t1 0
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# complete assignment statement with store
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sw $t1 0($t0)
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datalabel3:
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t1 -44
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# Add the stack pointer address to the offset.
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add $t1 $t1 $sp
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# Load the value of i.
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lw $t0 0($t1)
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li $t1 10
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slt $t0 $t0 $t1
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subi $t0 $t0 1
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bne $t0 $zero datalabel4
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# Entering a new scope.
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# Symbols in symbol table:
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# println
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# Update the stack pointer.
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addi $sp $sp -44
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# Get a's offset from $sp from the symbol table and initialize a's address with it. We'll add $sp later.
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li $t0 4
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Evaluate the index expression and store in a register.
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t2 0
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of i.
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lw $t1 0($t2)
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# Multiply the index by -4.
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li $t2 4
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mul $t1 $t1 $t2
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# Add the index offset to the offset.
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add $t0 $t0 $t1
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# Compute rhs for assignment =
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t2 0
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of i.
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lw $t1 0($t2)
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# complete assignment statement with store
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sw $t1 0($t0)
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t0 0
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# Add the stack pointer address to the offset.
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add $t0 $t0 $sp
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# Compute rhs for assignment =
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# Get i's offset from $sp from the symbol table and initialize i's address with it. We'll add $sp later.
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li $t2 0
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Load the value of i.
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lw $t1 0($t2)
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li $t2 1
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add $t1 $t1 $t2
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# complete assignment statement with store
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sw $t1 0($t0)
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# Exiting scope.
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addi $sp $sp 44
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j datalabel3
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datalabel4:
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# println
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# Calling function sum
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# Save $ra to a register
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move $t0 $ra
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# Save $t0-9 registers
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sw $t0 -48($sp)
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# Evaluate parameters and save to stack
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# Get a's offset from $sp from the symbol table and initialize a's address with it. We'll add $sp later.
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li $t2 -40
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Put the address of the array into the register.
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# Use the address of a.
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move $t1 $t2
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sw $t1 -52($sp)
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li $t1 4
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sw $t1 -56($sp)
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# Update the stack pointer
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add $sp $sp -48
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# Call the function
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jal sum
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# Restore the stack pointer
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add $sp $sp 48
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# Restore $t0-9 registers
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lw $t0 -48($sp)
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# Restore $ra
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move $ra $t0
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# Get return value off stack
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lw $t0 -60($sp)
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move $a0 $t0
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li $v0 1
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syscall
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la $a0 newline
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li $v0 4
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syscall
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# println
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# Calling function sum
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# Save $ra to a register
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move $t0 $ra
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# Save $t0-9 registers
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sw $t0 -48($sp)
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# Evaluate parameters and save to stack
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# Get a's offset from $sp from the symbol table and initialize a's address with it. We'll add $sp later.
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li $t2 -40
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# Add the stack pointer address to the offset.
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add $t2 $t2 $sp
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# Put the address of the array into the register.
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# Use the address of a.
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move $t1 $t2
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sw $t1 -52($sp)
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li $t1 8
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sw $t1 -56($sp)
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# Update the stack pointer
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add $sp $sp -48
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# Call the function
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jal sum
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# Restore the stack pointer
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add $sp $sp 48
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# Restore $t0-9 registers
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lw $t0 -48($sp)
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# Restore $ra
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move $ra $t0
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# Get return value off stack
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lw $t0 -60($sp)
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move $a0 $t0
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li $v0 1
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syscall
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la $a0 newline
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li $v0 4
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syscall
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# Exiting scope.
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addi $sp $sp 0
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li $v0 10
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syscall
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# All memory structures are placed after the
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# .data assembler directive
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.data
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newline: .asciiz "\n"
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datalabel2: .asciiz "This should print 6 and 28"
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