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-rw-r--r--apps/plugins/lib/fixedpoint.h52
1 files changed, 2 insertions, 50 deletions
diff --git a/apps/plugins/lib/fixedpoint.h b/apps/plugins/lib/fixedpoint.h
index 1631f8d6d8..811a1d9b81 100644
--- a/apps/plugins/lib/fixedpoint.h
+++ b/apps/plugins/lib/fixedpoint.h
@@ -20,55 +20,7 @@
20 * KIND, either express or implied. 20 * KIND, either express or implied.
21 * 21 *
22 ****************************************************************************/ 22 ****************************************************************************/
23
24/** PLUGINS - FIXED POINT MATH ROUTINES - USAGE
25 *
26 * - x and y arguments are fixed point integers
27 * - fracbits is the number of fractional bits in the argument(s)
28 * - functions return long fixed point integers with the specified number
29 * of fractional bits unless otherwise specified
30 *
31 * Calculate sin and cos of an angle:
32 * fp_sincos(phase, *cos)
33 * where phase is a 32 bit unsigned integer with 0 representing 0
34 * and 0xFFFFFFFF representing 2*pi, and *cos is the address to
35 * a long signed integer. Value returned is a long signed integer
36 * from -0x80000000 to 0x7fffffff, representing -1 to 1 respectively.
37 * That is, value is a fixed point integer with 31 fractional bits.
38 *
39 * Take square root of a fixed point number:
40 * fp_sqrt(x, fracbits)
41 *
42 * Calculate sin or cos of an angle (very fast, from a table):
43 * fp14_sin(angle)
44 * fp14_cos(angle)
45 * where angle is a non-fixed point integer in degrees. Value
46 * returned is a fixed point integer with 14 fractional bits.
47 *
48 * Calculate the natural log of a positive fixed point integer
49 * fp16_log(x)
50 * where x and the value returned are fixed point integers
51 * with 16 fractional bits.
52 */
53
54#ifndef _FIXEDPOINT_H_PLUGINS 23#ifndef _FIXEDPOINT_H_PLUGINS
55#define _FIXEDPOINT_H_PLUGINS 24#define _FIXEDPOINT_H_PLUGINS
56 25#include "../../../firmware/include/fixedpoint.h"
57long fp_sincos(unsigned long phase, long *cos); 26#endif /* _FIXEDPOINT_H_PLUGINS */
58long fp_sqrt(long a, unsigned int fracbits);
59long fp14_cos(int val);
60long fp14_sin(int val);
61long fp16_log(int x);
62long fp16_exp(int x);
63
64unsigned long isqrt(unsigned long x);
65
66/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
67 * whichever is faster for the architecture) */
68#ifdef CPU_ARM
69#define FMULU(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b))))
70#else /* SH1, coldfire */
71#define FMULU(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b))))
72#endif
73
74#endif