diff options
Diffstat (limited to 'mpi/alpha')
| -rw-r--r-- | mpi/alpha/distfiles | 3 | ||||
| -rw-r--r-- | mpi/alpha/udiv-qrnnd.S | 161 |
2 files changed, 164 insertions, 0 deletions
diff --git a/mpi/alpha/distfiles b/mpi/alpha/distfiles new file mode 100644 index 000000000..4dd0ffe3a --- /dev/null +++ b/mpi/alpha/distfiles @@ -0,0 +1,3 @@ + +udiv-qrnnd.S + diff --git a/mpi/alpha/udiv-qrnnd.S b/mpi/alpha/udiv-qrnnd.S new file mode 100644 index 000000000..487991cd8 --- /dev/null +++ b/mpi/alpha/udiv-qrnnd.S @@ -0,0 +1,161 @@ +/* Alpha 21064 __udiv_qrnnd + * + * Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc. + * Copyright (c) 1997 by Werner Koch (dd9jn) + * + * This file is part of G10. + * + * G10 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. + * + * G10 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + * Note: This code is heavily based on the GNU MP Library. + * Actually it's the same code with only minor changes in the + * way the data is stored; this is to support the abstraction + * of an optional secure memory allocation which may be used + * to avoid revealing of sensitive data due to paging etc. + * The GNU MP Library itself is published under the LGPL; + * however I decided to publish this code under the plain GPL. + */ + + + + .set noreorder + .set noat +.text + .align 3 + .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 + + 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,.LOdd + stq n1,0(rem_ptr) + bis $31,n0,$0 + ret $31,($26),1 + +.LOdd: + /* q' in n0. r' in n1 */ + addq n1,n0,n1 + cmpult n1,n0,tmp # tmp := carry from addq + beq tmp,.LLp6 + addq n0,1,n0 + subq n1,d,n1 +.LLp6: cmpult n1,d,tmp + bne tmp,.LLp7 + addq n0,1,n0 + subq n1,d,n1 +.LLp7: + stq n1,0(rem_ptr) + bis $31,n0,$0 + ret $31,($26),1 + + .end __udiv_qrnnd |