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fix16.h: provide fix16_from-like compile-time macros

This commit is contained in:
Xavier Del Campo Romero 2021-10-24 02:42:00 +02:00
parent d9068688be
commit ac37834fe6
1 changed files with 6 additions and 0 deletions
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6
libfixmath/fixmath/fix16.h
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@ -42,6 +42,12 @@ static inline fix16_t fix16_from_int(int a) { return a * fix16_one; }
static inline float fix16_to_float(fix16_t a) { return (float)a / fix16_one; }
static inline double fix16_to_dbl(fix16_t a) { return (double)a / fix16_one; }
/* Static inline functions cannot be used to determine compile-time values,
* so use this expression instead if needed. */
#define FIX16_C_FROM_INT(a) ((a) * fix16_one)
#define FIX16_C_FROM_FLOAT(a) (((float)(a) * fix16_one) >= 0 ? \
(((float)(a) * fix16_one)) + 0.5f : ((float)(a) * fix16_one) - 0.5f)
static inline int fix16_to_int(fix16_t a)
{
#ifdef FIXMATH_NO_ROUNDING