| # Alpha 21064 __udiv_qrnnd |
| |
| # Copyright (C) 1992-2014 Free Software Foundation, Inc. |
| |
| # This file is part of the GNU MP Library. |
| |
| # The GNU MP Library is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU Lesser General Public License as published by |
| # the Free Software Foundation; either version 2.1 of the License, or (at your |
| # option) any later version. |
| |
| # The GNU MP Library 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 Lesser General Public |
| # License for more details. |
| |
| # You should have received a copy of the GNU Lesser General Public License |
| # along with the GNU MP Library. If not, see <http://www.gnu.org/licenses/>. |
| |
| #include <sysdep.h> |
| |
| .set noreorder |
| .set noat |
| |
| .text |
| |
| LEAF(__udiv_qrnnd, 0) |
| #ifdef PROF |
| ldgp gp, 0(pv) |
| lda AT, _mcount |
| jsr AT, (AT), _mcount |
| .prologue 1 |
| #else |
| .prologue 0 |
| #endif |
| |
| #define cnt $2 |
| #define tmp $3 |
| #define rem_ptr $16 |
| #define n1 $17 |
| #define n0 $18 |
| #define d $19 |
| #define qb $20 |
| |
| ldiq cnt,16 |
| blt d,$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 |
