110 lines
1.3 KiB
ArmAsm
110 lines
1.3 KiB
ArmAsm
/* x86 Assembly (AT&T style) version of a Prime Number Finder
|
|
haplo@mindstab.net */
|
|
|
|
.data
|
|
numstr: .asciz "%d\n"
|
|
max = 100000
|
|
scanformat : .asciz "%d"
|
|
|
|
int = 0
|
|
|
|
.text
|
|
.extern printf
|
|
.extern scanf
|
|
.extern exit
|
|
|
|
.global main
|
|
|
|
printnum:
|
|
pushl %ebx
|
|
pushl $numstr
|
|
call printf
|
|
pop %eax
|
|
pop %ecx
|
|
ret
|
|
|
|
main:
|
|
|
|
# scanf code from http://www.linuxgazette.com/issue71/joshi.html
|
|
|
|
pushl %ebp # save EBP on stack
|
|
movl %esp,%ebp # EBP = ESP
|
|
subl $4,%esp # create space for x on the stack
|
|
leal -4(%ebp),%eax
|
|
pushl %eax
|
|
pushl $scanformat
|
|
call scanf
|
|
addl $12, %esp
|
|
|
|
movl -4(%ebp),%eax
|
|
movl %eax, -12(%ebp)
|
|
|
|
# END scanf code
|
|
|
|
|
|
# The rest is all my code
|
|
|
|
pushl %eax
|
|
|
|
movl $3, %ebx
|
|
movl $2, %ecx
|
|
movl $4, %edx
|
|
|
|
toploop:
|
|
|
|
popl %eax
|
|
cmp %eax, %ebx
|
|
jg end
|
|
pushl %eax
|
|
|
|
pushl %edx
|
|
pushl %ecx
|
|
pushl %ebx
|
|
movl $3, %ecx
|
|
|
|
checkloop:
|
|
|
|
popl %ebx
|
|
popl %edx
|
|
cmp %edx, %ecx
|
|
pushl %edx
|
|
pushl %ebx
|
|
jge showprime
|
|
|
|
movl $0, %edx
|
|
movl %ebx, %eax
|
|
divl %ecx
|
|
|
|
addl $2, %ecx
|
|
|
|
cmp $0, %edx
|
|
je doneloop
|
|
|
|
jmp checkloop
|
|
|
|
showprime:
|
|
call printnum
|
|
|
|
doneloop:
|
|
|
|
popl %ebx
|
|
popl %ecx
|
|
popl %edx
|
|
|
|
addl $2, %ebx
|
|
|
|
cmp %edx, %ebx
|
|
jl toploop
|
|
|
|
addl $1, %ecx
|
|
movl %ecx, %eax
|
|
mull %eax
|
|
movl %eax, %edx
|
|
|
|
jmp toploop
|
|
|
|
end:
|
|
pushl $0
|
|
call exit
|
|
|