1 dnl HP-PA __udiv_qrnnd division support, used from longlong.h.
2 dnl This version runs fast on PA 7000 and later.
4 dnl Copyright 1993, 1994, 2000, 2001, 2003 Free Software Foundation, Inc.
6 dnl This file is part of the GNU MP Library.
8 dnl The GNU MP Library is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU Lesser General Public License as published
10 dnl by the Free Software Foundation; either version 3 of the License, or (at
11 dnl your option) any later version.
13 dnl The GNU MP Library is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 dnl License for more details.
18 dnl You should have received a copy of the GNU Lesser General Public License
19 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
21 include(`../config.m4')
29 C This file has caused a lot of trouble, since it demands PIC reference to
30 C static data, which triggers bugs in gas (at least version 2.7 through
31 C 2.11.2). When the bug is triggered, many bogus relocs are generated. The
32 C current solution is to stuff data right into the code, and refer it using
33 C absolute offsets. Fragile to be sure, but nothing else seems to work.
38 INT64(0000, 0x43f00000, 0x0) C 2^64
41 PROLOGUE(mpn_udiv_qrnnd)
42 C .callinfo frame=64,no_calls
46 stws %r25,-16(0,%r30) C n_hi
47 stws %r24,-12(0,%r30) C n_lo
52 .word 0x0 C padding for alignment
53 .word 0x43f00000, 0x0 C 2^64
55 ` ldil `L'%L(0000),%r31
56 ldo R%L(0000)(%r31),%r31')
58 fldds -16(0,%r30),%fr5
61 fcnvxf,dbl,dbl %fr5,%fr5
63 fadd,dbl %fr4,%fr5,%fr5
67 fldws -12(0,%r30),%fr6R
68 fcnvxf,dbl,dbl %fr6,%fr4
70 fdiv,dbl %fr5,%fr4,%fr5
72 fcnvfx,dbl,dbl %fr5,%fr4
74 xmpyu %fr4R,%fr6R,%fr6
76 fstds %fr6,-16(0,%r30)
91 EPILOGUE(mpn_udiv_qrnnd)