main.s

在linux下实行的简单的c语言编译器

#main.S: target asm file generated by BenC
#Benfaung @ Copyrights
#http://www.benfaung.org
#------------------------------

.section .data

.section .bss

.section .text
	.type f, @function
f:
	enter	$4,	$0
	#Initiate Varible with int:
	pushl	%eax
	pushl	%eax
	movl	$1,	%eax
	pushl	%ebp
	addl	$-4,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp
	popl	%eax

	#Initiate Varible with int:
	pushl	%eax
	pushl	%eax
	movl	$1,	%eax
	pushl	%ebp
	addl	$-8,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp
	popl	%eax

	#Initiate Varible with int:
	pushl	%eax
	pushl	%eax
	movl	$1,	%eax
	pushl	%ebp
	addl	$-12,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp
	popl	%eax

	#declare variable without initiation:
	pushl	%eax

	#If Stmt:
	#load a constant:
	movl	$0,	%eax
	pushl	%eax

	#eq expr:
	popl	%ebx
	popl	%eax
	cmpl	%ebx,	%eax
	je	.LABEL0
	movl	$0,	%eax
	pushl	%eax
	jmp	.LABEL1
	.LABEL0:
	movl	$1,	%eax
	.LABEL1:
	#load a constant:
	movl	$1,	%eax
	pushl	%eax

	#eq expr:
	popl	%ebx
	popl	%eax
	cmpl	%ebx,	%eax
	je	.LABEL2
	movl	$0,	%eax
	pushl	%eax
	jmp	.LABEL3
	.LABEL2:
	movl	$1,	%eax
	.LABEL3:
	#or expr:
	popl	%ebx
	popl	%eax
	or	%ebx,	%eax
	pushl	%eax

	popl	%eax
	cmpl	$0,	%eax
	je	.L1
	#load a constant:
	movl	$1,	%eax
	pushl	%eax

	#return with int:
	popl	%eax
	pushl	%ebp
	addl	$-18,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp

	leave
	ret
.L1 :
	#while stmt:
.L3 :
	#load a value from memory:
	pushl	%ebp
	addl	$-12,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#lt expr:
	popl	%ebx
	popl	%eax
	cmpl	%ebx,	%eax
	jl	.LABEL4
	movl	$0,	%eax
	pushl	%eax
	jmp	.LABEL5
	.LABEL4:
	movl	$1,	%eax
	.LABEL5:
	popl	%eax
	cmpl	$0,	%eax
	je	.L4
	#backup memory value:
	pushl	-4(%ebp)

	#backup memory value:
	pushl	-8(%ebp)

	#backup memory value:
	pushl	-12(%ebp)

	#backup memory value:
	pushl	-16(%ebp)

	#load an address from memory:
	movl	%ebp,	%eax
	addl	$-4,	%eax
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-4,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-8,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#add expr:
	popl	%ebx
	popl	%eax
	addl	%ebx,	%eax
	pushl	%eax

	#store a value to memory:
	popl	%ebx
	popl	%eax
	pushl	%ebp
	movl	%eax,	%ebp
	movl	%ebx,	(%ebp)
	popl	%ebp

	#load an address from memory:
	movl	%ebp,	%eax
	addl	$-8,	%eax
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-4,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-8,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#add expr:
	popl	%ebx
	popl	%eax
	addl	%ebx,	%eax
	pushl	%eax

	#store a value to memory:
	popl	%ebx
	popl	%eax
	pushl	%ebp
	movl	%eax,	%ebp
	movl	%ebx,	(%ebp)
	popl	%ebp

	#load an address from memory:
	movl	%ebp,	%eax
	addl	$-12,	%eax
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-12,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#load a constant:
	movl	$1,	%eax
	pushl	%eax

	#add expr:
	popl	%ebx
	popl	%eax
	addl	%ebx,	%eax
	pushl	%eax

	#store a value to memory:
	popl	%ebx
	popl	%eax
	pushl	%ebp
	movl	%eax,	%ebp
	movl	%ebx,	(%ebp)
	popl	%ebp

	#restore memory value:
	popl	%ebx
	popl	-4(%ebp)

	#restore memory value:
	popl	%ebx
	popl	-8(%ebp)

	#restore memory value:
	popl	%ebx
	popl	-12(%ebp)

	#restore memory value:
	popl	%ebx
	popl	-16(%ebp)

	jmp	.L3
.L4 :
	#load a value from memory:
	pushl	%ebp
	addl	$-8,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#return with int:
	popl	%eax
	pushl	%ebp
	addl	$-18,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp

	leave
	ret
	#return without a value:
	leave
	ret

.global main
	.type main, @function
main:
	enter	$0,	$0
	#Initiate Varible with int:
	pushl	%eax
	pushl	%eax
	movl	$1,	%eax
	pushl	%ebp
	addl	$-4,	%ebp
	movl	%eax,	(%ebp)
	popl	%ebp
	popl	%eax

	#while stmt:
.L5 :
	#load a value from memory:
	pushl	%ebp
	addl	$-4,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#load a constant:
	movl	$10,	%eax
	pushl	%eax

	#le expr:
	popl	%ebx
	popl	%eax
	cmpl	%ebx,	%eax
	jle	.LABEL6
	movl	$0,	%eax
	pushl	%eax
	jmp	.LABEL7
	.LABEL6:
	movl	$1,	%eax
	.LABEL7:
	popl	%eax
	cmpl	$0,	%eax
	je	.L6
	#backup memory value:
	pushl	-4(%ebp)

	#passing params:
	#load a value from memory:
	pushl	%ebp
	addl	$-4,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#call stmt:
	call	f

	#load an address from memory:
	movl	%ebp,	%eax
	addl	$-4,	%eax
	pushl	%eax

	#load a value from memory:
	pushl	%ebp
	addl	$-4,	%ebp
	movl	(%ebp),	%eax
	popl	%ebp
	pushl	%eax

	#load a constant:
	movl	$1,	%eax
	pushl	%eax

	#add expr:
	popl	%ebx
	popl	%eax
	addl	%ebx,	%eax
	pushl	%eax

	#store a value to memory:
	popl	%ebx
	popl	%eax
	pushl	%ebp
	movl	%eax,	%ebp
	movl	%ebx,	(%ebp)
	popl	%ebp

	#restore memory value:
	popl	%ebx
	popl	-4(%ebp)

	jmp	.L5
.L6 :
	#return without a value:
	leave
	ret