2 * Copyright © 2013 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 void ao_plus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b) __FATTR {
24 r->high = a->high + b->high;
31 void ao_minus64(ao_int64_t *r, ao_int64_t *a, ao_int64_t *b) __FATTR {
34 r->high = a->high - b->high;
41 void ao_rshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d) __FATTR {
45 r->low |= a->high << (32 - d);
46 r->high = (int32_t) a->high >> d;
49 r->low = (int32_t) a->high >> d;
54 void ao_lshift64(ao_int64_t *r, ao_int64_t *a, uint8_t d) __FATTR {
56 r->high = a->high << d;
58 r->high |= a->low >> (32 - d);
62 r->high = a->low << d;
67 static void ao_umul64_32_32(__ARG ao_int64_t *r, uint32_t a, uint32_t b) {
70 r->low = (uint32_t) (uint16_t) a * (uint16_t) b;
71 r->high = (uint32_t) (uint16_t) (a >> 16) * (uint16_t) (b >> 16);
73 s = (uint32_t) (uint16_t) (a >> 16) * (uint16_t) b;
79 s = (uint32_t) (uint16_t) a * (uint16_t) (b >> 16);
86 void ao_neg64(ao_int64_t *r, ao_int64_t *a) __FATTR {
88 if (!(r->low = ~a->low + 1))
92 void ao_mul64_32_32(__ARG ao_int64_t *r, int32_t a, int32_t b) __FATTR {
103 ao_umul64_32_32(r, a, b);
108 static void ao_umul64(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG ao_int64_t *b) {
109 __LOCAL ao_int64_t r2, r3;
111 ao_umul64_32_32(&r2, a->high, b->low);
112 ao_umul64_32_32(&r3, a->low, b->high);
113 ao_umul64_32_32(r, a->low, b->low);
115 r->high += r2.low + r3.low;
118 static __ARG ao_int64_t ap, bp;
120 void ao_mul64(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG ao_int64_t *b) __FATTR {
121 uint8_t negative = 0;
123 if (ao_int64_negativep(a)) {
128 if (ao_int64_negativep(b)) {
138 static void ao_umul64_64_16(__ARG ao_int64_t *r, __ARG ao_int64_t *a, uint16_t b) {
142 ao_umul64_32_32(r, a->low, b);
146 void ao_mul64_64_16(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG uint16_t b) __FATTR {
147 uint8_t negative = 0;
149 if ((int32_t) a->high < 0) {
154 ao_umul64_64_16(r, a, b);