Annotation of OpenXM_contrib/gmp/mpn/cray/ieee/sqr_basecase.c, Revision 1.1.1.1
1.1 ohara 1: /* Cray PVP/IEEE mpn_sqr_basecase.
2:
3: Copyright 2000, 2001 Free Software Foundation, Inc.
4:
5: This file is part of the GNU MP Library.
6:
7: The GNU MP Library is free software; you can redistribute it and/or modify
8: it under the terms of the GNU Lesser General Public License as published by
9: the Free Software Foundation; either version 2.1 of the License, or (at your
10: option) any later version.
11:
12: The GNU MP Library is distributed in the hope that it will be useful, but
13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15: License for more details.
16:
17: You should have received a copy of the GNU Lesser General Public License
18: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20: MA 02111-1307, USA. */
21:
22: /* This is just mpn_mul_basecase with trivial modifications. */
23:
24: #include <intrinsics.h>
25: #include "gmp.h"
26: #include "gmp-impl.h"
27:
28: void
29: mpn_sqr_basecase (mp_ptr rp,
30: mp_srcptr up, mp_size_t un)
31: {
32: mp_limb_t cy[un + un];
33: mp_limb_t ul;
34: mp_limb_t a, b, r, s0, s1, c0, c1;
35: mp_size_t i, j;
36: int more_carries;
37:
38: for (i = 0; i < un + un; i++)
39: {
40: rp[i] = 0;
41: cy[i] = 0;
42: }
43:
44: #pragma _CRI novector
45: for (j = 0; j < un; j++)
46: {
47: ul = up[j];
48:
49: a = up[0] * ul;
50: r = rp[j];
51: s0 = a + r;
52: rp[j] = s0;
53: c0 = ((a & r) | ((a | r) & ~s0)) >> 63;
54: cy[j] += c0;
55:
56: #pragma _CRI ivdep
57: for (i = 1; i < un; i++)
58: {
59: a = up[i] * ul;
60: b = _int_mult_upper (up[i - 1], ul);
61: s0 = a + b;
62: c0 = ((a & b) | ((a | b) & ~s0)) >> 63;
63: r = rp[j + i];
64: s1 = s0 + r;
65: rp[j + i] = s1;
66: c1 = ((s0 & r) | ((s0 | r) & ~s1)) >> 63;
67: cy[j + i] += c0 + c1;
68: }
69: rp[j + un] = _int_mult_upper (up[un - 1], ul);
70: }
71:
72: more_carries = 0;
73: #pragma _CRI ivdep
74: for (i = 1; i < un + un; i++)
75: {
76: r = rp[i];
77: c0 = cy[i - 1];
78: s0 = r + c0;
79: rp[i] = s0;
80: c0 = (r & ~s0) >> 63;
81: more_carries += c0;
82: }
83: /* If that second loop generated carry, handle that in scalar loop. */
84: if (more_carries)
85: {
86: mp_limb_t cyrec = 0;
87: for (i = 1; i < un + un; i++)
88: {
89: r = rp[i];
90: c0 = (r < cy[i - 1]);
91: s0 = r + cyrec;
92: rp[i] = s0;
93: c1 = (r & ~s0) >> 63;
94: cyrec = c0 | c1;
95: }
96: }
97: }
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