// counting it as SP delta, which is irrelevant as we are
	// on the system stack.
	SUB	$(asmcgocallSaveOffset+16), R1, R10
	RLDCR	$0, R10, $~15, R1	// 16-byte alignment for gcc ABI
	MOVD	R5, (asmcgocallSaveOffset+8)(R1)	// save old g on stack
	MOVD	(g_stack+stack_hi)(R5), R5
	SUB	R7, R5
	MOVD	R5, asmcgocallSaveOffset(R1)    // save depth in old g stack (can't just save SP, as stack might be copied during a callback)
#ifdef GOOS_aix