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      1 /*	$NetBSD: alloca.S,v 1.2 2014/05/22 15:01:56 uebayasi Exp $	*/
      2 
      3 #include <machine/asm.h>
      4 
      5 #if defined(LIBC_SCCS)
      6 	RCSID("$NetBSD: alloca.S,v 1.2 2014/05/22 15:01:56 uebayasi Exp $")
      7 #endif
      8 
      9 ENTRY(alloca)
     10 	popq	%rdx
     11 	movq	%rsp,%rcx
     12 	addq	$15,%rdi	/*  round up to 16 bytes */
     13 	andq	$~15,%rdi
     14 	subq	%rdi,%rsp
     15 	movq	%rsp,%rax
     16 	jmp	*%rdx
     17 END(alloca)
     18