qrnnd.S
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- # Alpha 21064 __udiv_qrnnd
- # Copyright (C) 1992, 1994, 1995, 2000 Free Software Foundation, Inc.
- # This file is part of GCC.
- # The GNU MP Library is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 2 of the License, or (at your
- # option) any later version.
- # In addition to the permissions in the GNU General Public License, the
- # Free Software Foundation gives you unlimited permission to link the
- # compiled version of this file with other programs, and to distribute
- # those programs without any restriction coming from the use of this
- # file. (The General Public License restrictions do apply in other
- # respects; for example, they cover modification of the file, and
- # distribution when not linked into another program.)
- # This file is distributed in the hope that it will be useful, but
- # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
- # License for more details.
- # You should have received a copy of the GNU General Public License
- # along with GCC; see the file COPYING. If not, write to the
- # Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- # MA 02111-1307, USA.
- .set noreorder
- .set noat
- .text
- .globl __udiv_qrnnd
- .ent __udiv_qrnnd
- __udiv_qrnnd:
- .frame $30,0,$26,0
- .prologue 0
- #define cnt $2
- #define tmp $3
- #define rem_ptr $16
- #define n1 $17
- #define n0 $18
- #define d $19
- #define qb $20
- #define AT $at
- ldiq cnt,16
- blt d,$largedivisor
- $loop1: cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule d,n1,qb
- subq n1,d,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule d,n1,qb
- subq n1,d,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule d,n1,qb
- subq n1,d,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule d,n1,qb
- subq n1,d,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- subq cnt,1,cnt
- bgt cnt,$loop1
- stq n1,0(rem_ptr)
- bis $31,n0,$0
- ret $31,($26),1
- $largedivisor:
- and n0,1,$4
- srl n0,1,n0
- sll n1,63,tmp
- or tmp,n0,n0
- srl n1,1,n1
- and d,1,$6
- srl d,1,$5
- addq $5,$6,$5
- $loop2: cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule $5,n1,qb
- subq n1,$5,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule $5,n1,qb
- subq n1,$5,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule $5,n1,qb
- subq n1,$5,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- cmplt n0,0,tmp
- addq n1,n1,n1
- bis n1,tmp,n1
- addq n0,n0,n0
- cmpule $5,n1,qb
- subq n1,$5,tmp
- cmovne qb,tmp,n1
- bis n0,qb,n0
- subq cnt,1,cnt
- bgt cnt,$loop2
- addq n1,n1,n1
- addq $4,n1,n1
- bne $6,$Odd
- stq n1,0(rem_ptr)
- bis $31,n0,$0
- ret $31,($26),1
- $Odd:
- /* q' in n0. r' in n1 */
- addq n1,n0,n1
- cmpult n1,n0,tmp # tmp := carry from addq
- subq n1,d,AT
- addq n0,tmp,n0
- cmovne tmp,AT,n1
- cmpult n1,d,tmp
- addq n0,1,AT
- cmoveq tmp,AT,n0
- subq n1,d,AT
- cmoveq tmp,AT,n1
- stq n1,0(rem_ptr)
- bis $31,n0,$0
- ret $31,($26),1
- .end __udiv_qrnnd