src/red.src at master · LucAlexander/src · GitHub

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using_opinion syntax

comptime {
	comptime {
		mov r1 !mtp
		sub r1 r1 !8
	}
	bind 0 tmp = r1

	mov tmp !mtp
	sub tmp tmp !8
}
bind 1 sp = tmp

comptime {
	sub tmp tmp !8
}
bind 1 fp = tmp

comptime {
	sub tmp tmp !8
}
bind 0 stack_start = tmp

mov sp !stack_start
mov fp !stack_start

bind 1 psh +x {
	sub sp sp !8
	mov [sp] x
}

bind 1 pop +r {
	mov r [sp]
	add sp sp !8
}

bind 1 ret {
	mov sp fp
	pop fp
	pop ip
}

bind 1 ( +symbol ) {
	bind 0 tag = ip
	psh tag
	add [sp] [sp] !20
	psh fp
	mov fp sp
	jmp symbol
}

bind 1 def +name +args:{+arg %} +body:\= ... \; {
	bind 0 name = ip
	comptime {
		mov tmp !0
		mov r1 fp
	}
	args{
		comptime {
			add tmp tmp !8
			sub r2 r1 tmp
		}
		bind 0 arg = r2
	}
	body
	ret
}

bind 1 def +name +body:\= ... \; {
	bind 0 name = ip
	body
	ret
}

bind 1 exit {
	mov r0 !1
	int
}

(main)
exit

def clear_screen =
	mov r0 !0

	mov r1 !fbw
	mov r2 !fbh

	mul r1 r1 r2
	mul r1 r1 !4

	bind 0 loop = ip
		mov [r0] !ff808080
		movh [r0] !ff808080
		add r0 r0 !8

		cmp r0 r1
		jge end
		jmp loop

	bind 0 end = ip
	mov r0 !0
	int
	jmp clear_screen
;

def main = (clear_screen) ;