1dnl  SuperSPARC mpn_udiv_qrnnd division support, used from longlong.h.
2dnl  This is for SuperSPARC only, to compensate for its semi-functional
3dnl  udiv instruction.
4
5dnl  Copyright 1993, 1994, 1996, 2000 Free Software Foundation, Inc.
6
7dnl  This file is part of the GNU MP Library.
8dnl
9dnl  The GNU MP Library is free software; you can redistribute it and/or modify
10dnl  it under the terms of either:
11dnl
12dnl    * the GNU Lesser General Public License as published by the Free
13dnl      Software Foundation; either version 3 of the License, or (at your
14dnl      option) any later version.
15dnl
16dnl  or
17dnl
18dnl    * the GNU General Public License as published by the Free Software
19dnl      Foundation; either version 2 of the License, or (at your option) any
20dnl      later version.
21dnl
22dnl  or both in parallel, as here.
23dnl
24dnl  The GNU MP Library is distributed in the hope that it will be useful, but
25dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
26dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
27dnl  for more details.
28dnl
29dnl  You should have received copies of the GNU General Public License and the
30dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
31dnl  see https://www.gnu.org/licenses/.
32
33
34include(`../config.m4')
35
36C INPUT PARAMETERS
37C rem_ptr i0
38C n1                i1
39C n0                i2
40C d                 i3
41
42ASM_START()
43
44ifdef(`PIC',
45`         TEXT
46L(getpc):
47          retl
48          nop')
49
50          TEXT
51          ALIGN(8)
52L(C0):    .double   0r4294967296
53L(C1):    .double   0r2147483648
54
55PROLOGUE(mpn_udiv_qrnnd)
56          save      %sp,-104,%sp
57          st        %i1,[%fp-8]
58          ld        [%fp-8],%f10
59
60ifdef(`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
71L(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
79L(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
87L(250):
88          fdivd     %f2,%f4,%f2
89
90ifdef(`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
103L(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
109L(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
122L(253):
123          blu       L(246)
124          mov       %i4,%i0
125          add       %i4,1,%i0
126          sub       %o7,%i3,%o7
127L(246):
128          st        %o7,[%i5]
129          ret
130          restore
131EPILOGUE(mpn_udiv_qrnnd)
132