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