source/libs/gmp/gmp-src/mpn/sparc32/v8/udiv.asm

   1 dnl  SuperSPARC mpn_udiv_qrnnd division support, used from longlong.h.
   2 dnl  This is for SuperSPARC only, to compensate for its semi-functional
   3 dnl  udiv instruction.
   4
   5 dnl  Copyright 1993, 1994, 1996, 2000 Free Software Foundation, Inc.
   6
   7 dnl  This file is part of the GNU MP Library.
   8 dnl
   9 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
  10 dnl  it under the terms of either:
  11 dnl
  12 dnl    * the GNU Lesser General Public License as published by the Free
  13 dnl      Software Foundation; either version 3 of the License, or (at your
  14 dnl      option) any later version.
  15 dnl
  16 dnl  or
  17 dnl
  18 dnl    * the GNU General Public License as published by the Free Software
  19 dnl      Foundation; either version 2 of the License, or (at your option) any
  20 dnl      later version.
  21 dnl
  22 dnl  or both in parallel, as here.
  23 dnl
  24 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
  25 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  26 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  27 dnl  for more details.
  28 dnl
  29 dnl  You should have received copies of the GNU General Public License and the
  30 dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
  31 dnl  see https://www.gnu.org/licenses/.
  32
  33
  34 include(`../config.m4')
  35
  36 C INPUT PARAMETERS
  37 C rem_ptr       i0
  38 C n1            i1
  39 C n0            i2
  40 C d             i3
  41
  42 ASM_START()
  43
  44 ifdef(`PIC',
  45 `       TEXT
  46 L(getpc):
  47         retl
  48         nop')
  49
  50         TEXT
  51         ALIGN(8)
  52 L(C0):  .double 0r4294967296
  53 L(C1):  .double 0r2147483648
  54
  55 PROLOGUE(mpn_udiv_qrnnd)
  56         save    %sp,-104,%sp
  57         st      %i1,[%fp-8]
  58         ld      [%fp-8],%f10
  59
  60 ifdef(`PIC',
  61 `L(pc): call    L(getpc)                C put address of this insn in %o7
  62         ldd     [%o7+L(C0)-L(pc)],%f8',
  63 `       sethi   %hi(L(C0)),%o7
  64         ldd     [%o7+%lo(L(C0))],%f8')
  65
  66         fitod   %f10,%f4
  67         cmp     %i1,0
  68         bge     L(248)
  69         mov     %i0,%i5
  70         faddd   %f4,%f8,%f4
  71 L(248):
  72         st      %i2,[%fp-8]
  73         ld      [%fp-8],%f10
  74         fmuld   %f4,%f8,%f6
  75         cmp     %i2,0
  76         bge     L(249)
  77         fitod   %f10,%f2
  78         faddd   %f2,%f8,%f2
  79 L(249):
  80         st      %i3,[%fp-8]
  81         faddd   %f6,%f2,%f2
  82         ld      [%fp-8],%f10
  83         cmp     %i3,0
  84         bge     L(250)
  85         fitod   %f10,%f4
  86         faddd   %f4,%f8,%f4
  87 L(250):
  88         fdivd   %f2,%f4,%f2
  89
  90 ifdef(`PIC',
  91 `       ldd     [%o7+L(C1)-L(pc)],%f4',
  92 `       sethi   %hi(L(C1)),%o7
  93         ldd     [%o7+%lo(L(C1))],%f4')
  94
  95         fcmped  %f2,%f4
  96         nop
  97         fbge,a  L(251)
  98         fsubd   %f2,%f4,%f2
  99         fdtoi   %f2,%f2
 100         st      %f2,[%fp-8]
 101         b       L(252)
 102         ld      [%fp-8],%i4
 103 L(251):
 104         fdtoi   %f2,%f2
 105         st      %f2,[%fp-8]
 106         ld      [%fp-8],%i4
 107         sethi   %hi(-2147483648),%g2
 108         xor     %i4,%g2,%i4
 109 L(252):
 110         umul    %i3,%i4,%g3
 111         rd      %y,%i0
 112         subcc   %i2,%g3,%o7
 113         subxcc  %i1,%i0,%g0
 114         be      L(253)
 115         cmp     %o7,%i3
 116
 117         add     %i4,-1,%i0
 118         add     %o7,%i3,%o7
 119         st      %o7,[%i5]
 120         ret
 121         restore
 122 L(253):
 123         blu     L(246)
 124         mov     %i4,%i0
 125         add     %i4,1,%i0
 126         sub     %o7,%i3,%o7
 127 L(246):
 128         st      %o7,[%i5]
 129         ret
 130         restore
 131 EPILOGUE(mpn_udiv_qrnnd)