| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/sound/sound/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/sound/sound/snd_fxdiv_gen.h |
#ifndef _SND_FXDIV_GEN_H_
#define _SND_FXDIV_GEN_H_
/*
* Generated using snd_fxdiv_gen.awk, heaven, wind and awesome.
*
* DO NOT EDIT!
*/
#ifdef SND_USE_FXDIV
/*
* Fast unsigned 32bit integer division and rounding, accurate for
* x = 1 - 65536. This table should be enough to handle possible
* division for 1 - 72 (more can be generated though..).
*
* 72 = SND_CHN_MAX * PCM_32_BPS, which is why....
*/
static const uint32_t snd_fxdiv_table[][2] = {
[0x01] = { 0x0001, 0x00 }, /* x / 1 = (x * 1 ) >> 0 */
[0x02] = { 0x0001, 0x01 }, /* x / 2 = (x * 1 ) >> 1 */
[0x03] = { 0x2aab, 0x0f }, /* x / 3 = (x * 10923) >> 15 */
[0x04] = { 0x0001, 0x02 }, /* x / 4 = (x * 1 ) >> 2 */
[0x05] = { 0x0ccd, 0x0e }, /* x / 5 = (x * 3277 ) >> 14 */
[0x06] = { 0x2aab, 0x10 }, /* x / 6 = (x * 10923) >> 16 */
[0x07] = { 0x2493, 0x10 }, /* x / 7 = (x * 9363 ) >> 16 */
[0x08] = { 0x0001, 0x03 }, /* x / 8 = (x * 1 ) >> 3 */
[0x09] = { 0x0e39, 0x0f }, /* x / 9 = (x * 3641 ) >> 15 */
[0x0a] = { 0x0ccd, 0x0f }, /* x / 10 = (x * 3277 ) >> 15 */
[0x0b] = { 0x0ba3, 0x0f }, /* x / 11 = (x * 2979 ) >> 15 */
[0x0c] = { 0x0aab, 0x0f }, /* x / 12 = (x * 2731 ) >> 15 */
[0x0d] = { 0x09d9, 0x0f }, /* x / 13 = (x * 2521 ) >> 15 */
[0x0e] = { 0x0925, 0x0f }, /* x / 14 = (x * 2341 ) >> 15 */
[0x0f] = { 0x0889, 0x0f }, /* x / 15 = (x * 2185 ) >> 15 */
[0x10] = { 0x0001, 0x04 }, /* x / 16 = (x * 1 ) >> 4 */
[0x11] = { 0x00f1, 0x0c }, /* x / 17 = (x * 241 ) >> 12 */
[0x12] = { 0x0e39, 0x10 }, /* x / 18 = (x * 3641 ) >> 16 */
[0x14] = { 0x0ccd, 0x10 }, /* x / 20 = (x * 3277 ) >> 16 */
[0x15] = { 0x0c31, 0x10 }, /* x / 21 = (x * 3121 ) >> 16 */
[0x16] = { 0x0ba3, 0x10 }, /* x / 22 = (x * 2979 ) >> 16 */
[0x18] = { 0x0aab, 0x10 }, /* x / 24 = (x * 2731 ) >> 16 */
[0x1a] = { 0x09d9, 0x10 }, /* x / 26 = (x * 2521 ) >> 16 */
[0x1b] = { 0x025f, 0x0e }, /* x / 27 = (x * 607 ) >> 14 */
[0x1c] = { 0x0925, 0x10 }, /* x / 28 = (x * 2341 ) >> 16 */
[0x1e] = { 0x0889, 0x10 }, /* x / 30 = (x * 2185 ) >> 16 */
[0x20] = { 0x0001, 0x05 }, /* x / 32 = (x * 1 ) >> 5 */
[0x21] = { 0x03e1, 0x0f }, /* x / 33 = (x * 993 ) >> 15 */
[0x22] = { 0x00f1, 0x0d }, /* x / 34 = (x * 241 ) >> 13 */
[0x24] = { 0x071d, 0x10 }, /* x / 36 = (x * 1821 ) >> 16 */
[0x27] = { 0x0691, 0x10 }, /* x / 39 = (x * 1681 ) >> 16 */
[0x28] = { 0x0667, 0x10 }, /* x / 40 = (x * 1639 ) >> 16 */
[0x2a] = { 0x0619, 0x10 }, /* x / 42 = (x * 1561 ) >> 16 */
[0x2c] = { 0x02e9, 0x0f }, /* x / 44 = (x * 745 ) >> 15 */
[0x2d] = { 0x05b1, 0x10 }, /* x / 45 = (x * 1457 ) >> 16 */
[0x30] = { 0x02ab, 0x0f }, /* x / 48 = (x * 683 ) >> 15 */
[0x33] = { 0x0283, 0x0f }, /* x / 51 = (x * 643 ) >> 15 */
[0x34] = { 0x04ed, 0x10 }, /* x / 52 = (x * 1261 ) >> 16 */
[0x36] = { 0x025f, 0x0f }, /* x / 54 = (x * 607 ) >> 15 */
[0x38] = { 0x0493, 0x10 }, /* x / 56 = (x * 1171 ) >> 16 */
[0x3c] = { 0x0445, 0x10 }, /* x / 60 = (x * 1093 ) >> 16 */
[0x40] = { 0x0001, 0x06 }, /* x / 64 = (x * 1 ) >> 6 */
[0x44] = { 0x00f1, 0x0e }, /* x / 68 = (x * 241 ) >> 14 */
[0x48] = { 0x038f, 0x10 }, /* x / 72 = (x * 911 ) >> 16 */
};
#define SND_FXDIV_MAX 0x00010000
#define SND_FXDIV(x, y) (((uint32_t)(x) * \
snd_fxdiv_table[y][0]) >> \
snd_fxdiv_table[y][1])
#define SND_FXROUND(x, y) (SND_FXDIV(x, y) * (y))
#define SND_FXMOD(x, y) ((x) - SND_FXROUND(x, y))
#else /* !SND_USE_FXDIV */
#define SND_FXDIV_MAX 0x00020000
#define SND_FXDIV(x, y) ((x) / (y))
#define SND_FXROUND(x, y) ((x) - ((x) % (y)))
#define SND_FXMOD(x, y) ((x) % (y))
#endif /* SND_USE_FXDIV */
#endif /* !_SND_FXDIV_GEN_H_ */