dnl  Alpha auxiliary for longlong.h's count_leading_zeros

dnl  Copyright 1997, 2000, 2002 Free Software Foundation, Inc.

dnl  This file is part of the GNU MP Library.

dnl

dnl  The GNU MP Library is free software; you can redistribute it and/or modify

dnl  it under the terms of either:

dnl

dnl    * the GNU Lesser General Public License as published by the Free

dnl      Software Foundation; either version 3 of the License, or (at your

dnl      option) any later version.

dnl

dnl  or

dnl

dnl    * the GNU General Public License as published by the Free Software

dnl      Foundation; either version 2 of the License, or (at your option) any

dnl      later version.

dnl

dnl  or both in parallel, as here.

dnl

dnl  The GNU MP Library is distributed in the hope that it will be useful, but

dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

dnl  for more details.

dnl

dnl  You should have received copies of the GNU General Public License and the

dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,

dnl  see https://www.gnu.org/licenses/.

include(`../config.m4')

ASM_START()

EXTERN(__clz_tab)

PROLOGUE(mpn_count_leading_zeros,gp)

	cmpbge	r31,  r16, r1

	LEA(r3,__clz_tab)

	sra	r1,   1,   r1

	xor	r1,   127, r1

	srl	r16,  1,   r16

	addq	r1,   r3,  r1

	ldq_u	r0,   0(r1)

	lda	r2,   64

	extbl	r0,   r1,   r0

	s8subl	r0,   8,    r0

	srl	r16,  r0,   r16

	addq	r16,  r3,   r16

	ldq_u	r1,   0(r16)

	extbl	r1,   r16,  r1

	subq	r2,   r1,   r2

	subq	r2,   r0,   r0

	ret	r31,  (r26),1

EPILOGUE(mpn_count_leading_zeros)

ASM_END()