diff options
Diffstat (limited to 'firmware/include')
-rw-r--r-- | firmware/include/fixedpoint.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/firmware/include/fixedpoint.h b/firmware/include/fixedpoint.h index 3e14bdd68e..584bd58d84 100644 --- a/firmware/include/fixedpoint.h +++ b/firmware/include/fixedpoint.h | |||
@@ -102,6 +102,11 @@ unsigned long isqrt(unsigned long x); | |||
102 | #define FP_INF (0x7fffffff) | 102 | #define FP_INF (0x7fffffff) |
103 | #define FP_NEGINF -(0x7fffffff) | 103 | #define FP_NEGINF -(0x7fffffff) |
104 | 104 | ||
105 | /** FIXED POINT EXP10 | ||
106 | * Return 10^x as FP integer. Argument is FP integer. | ||
107 | */ | ||
108 | long fp_exp10(long x, unsigned int fracbits); | ||
109 | |||
105 | /* fracbits in range 12 - 22 work well. Higher is better for | 110 | /* fracbits in range 12 - 22 work well. Higher is better for |
106 | * calculating dB, lower is better for calculating factor. | 111 | * calculating dB, lower is better for calculating factor. |
107 | */ | 112 | */ |