Hidden 1_1

This function is called from lots of different places. This is probably a utility of some kind. It seems to be fairly simple, but I need to know more about what's going on ahead of time to know what this does. A number of bytes (arg<r5>) are copied from the address at <r4> to the address at <r6>. <r4> is originally 80407570. <r6> is either <r3> + <r5>, or <r3>-1, depending on if <r3> or <r4> is larger.

void hidden_1_1(<r3>, <r4>, <r5>) {
	if(<r4> < <r3>) {
		goto lessThan
	} else {
		goto gte
	}
}

lessThan:
	<r4> = <r4> + <r5>
	<r6> = <r3> + <r5>
	<r5>++
	while(true) {
		<r5>--
		if (<r5> ==0) {
			return
		}
		*(--<r6>) = *(--<r4>) //r4 and r6 are decremented. The byte pointed to by r6 is changed to the vale at the byte pointed to by r4
	}
:

gte:
	<r4>--
	<r6> = <r3> - 1
	<r5>++
	while(true) {
		<r5>--
		if (<r5> == 0) {
			return
		}
		*(++<r6>) = *(++<r4>) //r4 and r6 are incremented. The byte pointed to by r6 is changed to the byte pointed to by r4
	}