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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 void ao_plus64(__pdata ao_int64_t *r, __pdata ao_int64_t *a, __pdata ao_int64_t *b) __FATTR {
23 r->high = a->high + b->high;
30 void ao_minus64(__pdata ao_int64_t *r, __pdata ao_int64_t *a, __pdata ao_int64_t *b) __FATTR {
33 r->high = a->high - b->high;
40 void ao_rshift64(__pdata ao_int64_t *r, __pdata ao_int64_t *a, uint8_t d) __FATTR {
44 r->low |= a->high << (32 - d);
45 r->high = (int32_t) a->high >> d;
48 r->low = (int32_t) a->high >> d;
53 void ao_lshift64(__pdata ao_int64_t *r, __pdata ao_int64_t *a, uint8_t d) __FATTR {
55 r->high = a->high << d;
57 r->high |= a->low >> (32 - d);
61 r->high = a->low << d;
66 static void ao_umul64_32_32(__ARG ao_int64_t *r, uint32_t a, uint32_t b) __reentrant {
69 r->low = (uint32_t) (uint16_t) a * (uint16_t) b;
70 r->high = (uint32_t) (uint16_t) (a >> 16) * (uint16_t) (b >> 16);
72 s = (uint32_t) (uint16_t) (a >> 16) * (uint16_t) b;
78 s = (uint32_t) (uint16_t) a * (uint16_t) (b >> 16);
85 void ao_neg64(__pdata ao_int64_t *r, __pdata ao_int64_t *a) __FATTR {
87 if (!(r->low = ~a->low + 1))
91 void ao_mul64_32_32(__ARG ao_int64_t *r, int32_t a, int32_t b) __FATTR {
102 ao_umul64_32_32(r, a, b);
107 static void ao_umul64(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG ao_int64_t *b) __reentrant {
108 __LOCAL ao_int64_t r2, r3;
110 ao_umul64_32_32(&r2, a->high, b->low);
111 ao_umul64_32_32(&r3, a->low, b->high);
112 ao_umul64_32_32(r, a->low, b->low);
114 r->high += r2.low + r3.low;
117 static __ARG ao_int64_t ap, bp;
119 void ao_mul64(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG ao_int64_t *b) __FATTR {
120 uint8_t negative = 0;
122 if (ao_int64_negativep(a)) {
127 if (ao_int64_negativep(b)) {
137 static void ao_umul64_64_16(__ARG ao_int64_t *r, __ARG ao_int64_t *a, uint16_t b) __reentrant {
141 ao_umul64_32_32(r, a->low, b);
145 void ao_mul64_64_16(__ARG ao_int64_t *r, __ARG ao_int64_t *a, __ARG uint16_t b) __FATTR {
146 uint8_t negative = 0;
148 if ((int32_t) a->high < 0) {
153 ao_umul64_64_16(r, a, b);