udiv.asm
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上传日期:2022-08-06
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- dnl SuperSPARC mpn_udiv_qrnnd division support, used from longlong.h.
- dnl This is for SuperSPARC only, to compensate for its semi-functional
- dnl udiv instruction.
- dnl Copyright 1993, 1994, 1996, 2000 Free Software Foundation, Inc.
- dnl This file is part of the GNU MP Library.
- dnl The GNU MP Library is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU Lesser General Public License as published
- dnl by the Free Software Foundation; either version 3 of the License, or (at
- dnl your option) any later version.
- dnl The GNU MP Library is distributed in the hope that it will be useful, but
- dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- dnl License for more details.
- dnl You should have received a copy of the GNU Lesser General Public License
- dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
- include(`../config.m4')
- C INPUT PARAMETERS
- C rem_ptr i0
- C n1 i1
- C n0 i2
- C d i3
- ASM_START()
- ifdef(`PIC',
- ` TEXT
- L(getpc):
- retl
- nop')
- TEXT
- ALIGN(8)
- L(C0): .double 0r4294967296
- L(C1): .double 0r2147483648
- PROLOGUE(mpn_udiv_qrnnd)
- save %sp,-104,%sp
- st %i1,[%fp-8]
- ld [%fp-8],%f10
- ifdef(`PIC',
- `L(pc): call L(getpc) C put address of this insn in %o7
- ldd [%o7+L(C0)-L(pc)],%f8',
- ` sethi %hi(L(C0)),%o7
- ldd [%o7+%lo(L(C0))],%f8')
- fitod %f10,%f4
- cmp %i1,0
- bge L(248)
- mov %i0,%i5
- faddd %f4,%f8,%f4
- L(248):
- st %i2,[%fp-8]
- ld [%fp-8],%f10
- fmuld %f4,%f8,%f6
- cmp %i2,0
- bge L(249)
- fitod %f10,%f2
- faddd %f2,%f8,%f2
- L(249):
- st %i3,[%fp-8]
- faddd %f6,%f2,%f2
- ld [%fp-8],%f10
- cmp %i3,0
- bge L(250)
- fitod %f10,%f4
- faddd %f4,%f8,%f4
- L(250):
- fdivd %f2,%f4,%f2
- ifdef(`PIC',
- ` ldd [%o7+L(C1)-L(pc)],%f4',
- ` sethi %hi(L(C1)),%o7
- ldd [%o7+%lo(L(C1))],%f4')
- fcmped %f2,%f4
- nop
- fbge,a L(251)
- fsubd %f2,%f4,%f2
- fdtoi %f2,%f2
- st %f2,[%fp-8]
- b L(252)
- ld [%fp-8],%i4
- L(251):
- fdtoi %f2,%f2
- st %f2,[%fp-8]
- ld [%fp-8],%i4
- sethi %hi(-2147483648),%g2
- xor %i4,%g2,%i4
- L(252):
- umul %i3,%i4,%g3
- rd %y,%i0
- subcc %i2,%g3,%o7
- subxcc %i1,%i0,%g0
- be L(253)
- cmp %o7,%i3
- add %i4,-1,%i0
- add %o7,%i3,%o7
- st %o7,[%i5]
- ret
- restore
- L(253):
- blu L(246)
- mov %i4,%i0
- add %i4,1,%i0
- sub %o7,%i3,%o7
- L(246):
- st %o7,[%i5]
- ret
- restore
- EPILOGUE(mpn_udiv_qrnnd)