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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/alpha/math-emu/qrnnd.S
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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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