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Diffstat (limited to 'data/examples/test7.asm')
| -rw-r--r-- | data/examples/test7.asm | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/data/examples/test7.asm b/data/examples/test7.asm new file mode 100644 index 0000000..8414044 --- /dev/null +++ b/data/examples/test7.asm @@ -0,0 +1,141 @@ +# All program code is placed after the +# .text assembler directive +.text + +# Declare main as a global function +.globl main + +j main + +# code for identity +identity: +# Entering a new scope. +# Symbols in symbol table: +# println +# x +# return +# Update the stack pointer. +addi $sp $sp -0 +# Get x's offset from $sp from the symbol table and initialize x's address with it. We'll add $sp later. +li $t1 -4 +# Add the stack pointer address to the offset. +add $t1 $t1 $sp +# Load the value of x. +lw $t0 0($t1) +sw $t0 -8($sp) +jr $ra +# Exiting scope. +addi $sp $sp 0 +jr $ra + +# code for add +add: +# Entering a new scope. +# Symbols in symbol table: +# println +# x +# y +# return +# Update the stack pointer. +addi $sp $sp -0 +# Get x's offset from $sp from the symbol table and initialize x's address with it. We'll add $sp later. +li $t1 -4 +# Add the stack pointer address to the offset. +add $t1 $t1 $sp +# Load the value of x. +lw $t0 0($t1) +# Get y's offset from $sp from the symbol table and initialize y's address with it. We'll add $sp later. +li $t2 -8 +# Add the stack pointer address to the offset. +add $t2 $t2 $sp +# Load the value of y. +lw $t1 0($t2) +add $t0 $t0 $t1 +sw $t0 -12($sp) +jr $ra +# 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 +# println +# Calling function identity +# Save $ra to a register +move $t0 $ra +# Save $t0-9 registers +sw $t0 -4($sp) +# Evaluate parameters and save to stack +li $t1 7 +sw $t1 -8($sp) +# Update the stack pointer +add $sp $sp -4 +# Call the function +jal identity +# Restore the stack pointer +add $sp $sp 4 +# Restore $t0-9 registers +lw $t0 -4($sp) +# Restore $ra +move $ra $t0 +# Get return value off stack +lw $t0 -12($sp) +move $a0 $t0 +li $v0 1 +syscall +la $a0 newline +li $v0 4 +syscall +# println +# Calling function add +# Save $ra to a register +move $t0 $ra +# Save $t0-9 registers +sw $t0 -4($sp) +# Evaluate parameters and save to stack +li $t1 3 +sw $t1 -8($sp) +li $t1 4 +sw $t1 -12($sp) +# Update the stack pointer +add $sp $sp -4 +# Call the function +jal add +# Restore the stack pointer +add $sp $sp 4 +# Restore $t0-9 registers +lw $t0 -4($sp) +# Restore $ra +move $ra $t0 +# Get return value off stack +lw $t0 -16($sp) +move $a0 $t0 +li $v0 1 +syscall +la $a0 newline +li $v0 4 +syscall +# 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" |