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Diffstat (limited to 'data/examples/test5.asm')
| -rw-r--r-- | data/examples/test5.asm | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/data/examples/test5.asm b/data/examples/test5.asm new file mode 100644 index 0000000..76837bc --- /dev/null +++ b/data/examples/test5.asm @@ -0,0 +1,155 @@ +# All program code is placed after the +# .text assembler directive +.text + +# Declare main as a global function +.globl main + +j main + +# code for foo +foo: +# Entering a new scope. +# Symbols in symbol table: +# println +# return +# Update the stack pointer. +addi $sp $sp -0 +# println +li $t0 7 +move $a0 $t0 +li $v0 1 +syscall +la $a0 newline +li $v0 4 +syscall +# Exiting scope. +addi $sp $sp 0 +jr $ra + +# code for fum +fum: +# Entering a new scope. +# Symbols in symbol table: +# a +# println +# b +# return +# Update the stack pointer. +addi $sp $sp -0 +# Get a's offset from $sp from the symbol table and initialize a's address with it. We'll add $sp later. +li $t0 -4 +# Add the stack pointer address to the offset. +add $t0 $t0 $sp +# Compute rhs for assignment = +li $t1 9 +# complete assignment statement with store +sw $t1 0($t0) +# Get b's offset from $sp from the symbol table and initialize b's address with it. We'll add $sp later. +li $t0 -8 +# Add the stack pointer address to the offset. +add $t0 $t0 $sp +# Compute rhs for assignment = +li $t1 12 +# complete assignment statement with store +sw $t1 0($t0) +# println +# Get b's offset from $sp from the symbol table and initialize b's address with it. We'll add $sp later. +li $t1 -8 +# Add the stack pointer address to the offset. +add $t1 $t1 $sp +# Load the value of b. +lw $t0 0($t1) +# Get a's offset from $sp from the symbol table and initialize a's address with it. We'll add $sp later. +li $t2 -4 +# Add the stack pointer address to the offset. +add $t2 $t2 $sp +# Load the value of a. +lw $t1 0($t2) +sub $t0 $t0 $t1 +li $t1 4 +add $t0 $t0 $t1 +move $a0 $t0 +li $v0 1 +syscall +la $a0 newline +li $v0 4 +syscall +# Calling function foo +# Save $ra to a register +move $t0 $ra +# Save $t0-9 registers +sw $t0 -12($sp) +# Evaluate parameters and save to stack +# Update the stack pointer +add $sp $sp -12 +# Call the function +jal foo +# Restore the stack pointer +add $sp $sp 12 +# Restore $t0-9 registers +lw $t0 -12($sp) +# Restore $ra +move $ra $t0 +# Exiting scope. +addi $sp $sp 0 +jr $ra + +# code for main +main: +# Entering a new scope. +# Symbols in symbol table: +# println +# return +# Update the stack pointer. +addi $sp $sp -0 +# println +la $a0 datalabel0 +li $v0 4 +syscall +la $a0 newline +li $v0 4 +syscall +# Calling function foo +# Save $ra to a register +move $t0 $ra +# Save $t0-9 registers +sw $t0 -4($sp) +# Evaluate parameters and save to stack +# Update the stack pointer +add $sp $sp -4 +# Call the function +jal foo +# Restore the stack pointer +add $sp $sp 4 +# Restore $t0-9 registers +lw $t0 -4($sp) +# Restore $ra +move $ra $t0 +# Calling function fum +# Save $ra to a register +move $t0 $ra +# Save $t0-9 registers +sw $t0 -4($sp) +# Evaluate parameters and save to stack +# Update the stack pointer +add $sp $sp -4 +# Call the function +jal fum +# Restore the stack pointer +add $sp $sp 4 +# Restore $t0-9 registers +lw $t0 -4($sp) +# Restore $ra +move $ra $t0 +# Exiting scope. +addi $sp $sp 0 +li $v0 10 +syscall + +# All memory structures are placed after the +# .data assembler directive +.data + +newline: .asciiz "\n" +datalabel0: .asciiz "This program prints 7 7 7" |