| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 1 | /* longlong.h -- definitions for mixed size 32/64 bit arithmetic. |
| 2 | Copyright (C) 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This definition file is free software; you can redistribute it |
| 6 | and/or modify it under the terms of the GNU General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2, or (at your option) any later version. |
| 9 | |
| 10 | This definition file is distributed in the hope that it will be |
| 11 | useful, but WITHOUT ANY WARRANTY; without even the implied |
| 12 | warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 13 | See the GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 18 | Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | /* Borrowed from gcc-3.4.3 */ |
| 21 | |
| 22 | #define __BITS4 (W_TYPE_SIZE / 4) |
| 23 | #define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2)) |
| 24 | #define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1)) |
| 25 | #define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2)) |
| 26 | |
| 27 | #define count_leading_zeros(count, x) ((count) = __builtin_clz(x)) |
| 28 | |
| 29 | #define __udiv_qrnnd_c(q, r, n1, n0, d) \ |
| 30 | do { \ |
| 31 | UWtype __d1, __d0, __q1, __q0; \ |
| 32 | UWtype __r1, __r0, __m; \ |
| 33 | __d1 = __ll_highpart (d); \ |
| 34 | __d0 = __ll_lowpart (d); \ |
| 35 | \ |
| 36 | __r1 = (n1) % __d1; \ |
| 37 | __q1 = (n1) / __d1; \ |
| 38 | __m = (UWtype) __q1 * __d0; \ |
| 39 | __r1 = __r1 * __ll_B | __ll_highpart (n0); \ |
| 40 | if (__r1 < __m) \ |
| 41 | { \ |
| 42 | __q1--, __r1 += (d); \ |
| 43 | if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\ |
| 44 | if (__r1 < __m) \ |
| 45 | __q1--, __r1 += (d); \ |
| 46 | } \ |
| 47 | __r1 -= __m; \ |
| 48 | \ |
| 49 | __r0 = __r1 % __d1; \ |
| 50 | __q0 = __r1 / __d1; \ |
| 51 | __m = (UWtype) __q0 * __d0; \ |
| 52 | __r0 = __r0 * __ll_B | __ll_lowpart (n0); \ |
| 53 | if (__r0 < __m) \ |
| 54 | { \ |
| 55 | __q0--, __r0 += (d); \ |
| 56 | if (__r0 >= (d)) \ |
| 57 | if (__r0 < __m) \ |
| 58 | __q0--, __r0 += (d); \ |
| 59 | } \ |
| 60 | __r0 -= __m; \ |
| 61 | \ |
| 62 | (q) = (UWtype) __q1 * __ll_B | __q0; \ |
| 63 | (r) = __r0; \ |
| 64 | } while (0) |
| 65 | |
| 66 | #define udiv_qrnnd __udiv_qrnnd_c |
| 67 | |
| 68 | #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ |
| 69 | do { \ |
| 70 | UWtype __x; \ |
| 71 | __x = (al) - (bl); \ |
| 72 | (sh) = (ah) - (bh) - (__x > (al)); \ |
| 73 | (sl) = __x; \ |
| 74 | } while (0) |
| 75 | |
| 76 | #define umul_ppmm(w1, w0, u, v) \ |
| 77 | do { \ |
| 78 | UWtype __x0, __x1, __x2, __x3; \ |
| 79 | UHWtype __ul, __vl, __uh, __vh; \ |
| 80 | \ |
| 81 | __ul = __ll_lowpart (u); \ |
| 82 | __uh = __ll_highpart (u); \ |
| 83 | __vl = __ll_lowpart (v); \ |
| 84 | __vh = __ll_highpart (v); \ |
| 85 | \ |
| 86 | __x0 = (UWtype) __ul * __vl; \ |
| 87 | __x1 = (UWtype) __ul * __vh; \ |
| 88 | __x2 = (UWtype) __uh * __vl; \ |
| 89 | __x3 = (UWtype) __uh * __vh; \ |
| 90 | \ |
| 91 | __x1 += __ll_highpart (__x0);/* this can't give carry */ \ |
| 92 | __x1 += __x2; /* but this indeed can */ \ |
| 93 | if (__x1 < __x2) /* did we get it? */ \ |
| 94 | __x3 += __ll_B; /* yes, add it in the proper pos. */ \ |
| 95 | \ |
| 96 | (w1) = __x3 + __ll_highpart (__x1); \ |
| 97 | (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ |
| 98 | } while (0) |