Remove Quake Fast Inverse SQRT (it isn't faster)
This commit is contained in:
parent
e7e896e7d7
commit
68e6650df7
@ -1353,25 +1353,6 @@
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// Use float instead of double. Needs profiling.
|
||||
#if defined(ARDUINO_ARCH_SAM) && ENABLED(DELTA_FAST_SQRT)
|
||||
#undef ATAN2
|
||||
#undef FABS
|
||||
#undef POW
|
||||
#undef SQRT
|
||||
#undef CEIL
|
||||
#undef FLOOR
|
||||
#undef LROUND
|
||||
#undef FMOD
|
||||
#define ATAN2(y, x) atan2f(y, x)
|
||||
#define POW(x, y) powf(x, y)
|
||||
#define SQRT(x) sqrtf(x)
|
||||
#define CEIL(x) ceilf(x)
|
||||
#define FLOOR(x) floorf(x)
|
||||
#define LROUND(x) lroundf(x)
|
||||
#define FMOD(x, y) fmodf(x, y)
|
||||
#endif
|
||||
|
||||
// Number of VFAT entries used. Each entry has 13 UTF-16 characters
|
||||
#if ENABLED(SCROLL_LONG_FILENAMES)
|
||||
#define MAX_VFAT_ENTRIES (5)
|
||||
|
@ -90,31 +90,8 @@ void recalc_delta_settings() {
|
||||
*
|
||||
* - Disable the home_offset (M206) and/or position_shift (G92)
|
||||
* features to remove up to 12 float additions.
|
||||
*
|
||||
* - Use a fast-inverse-sqrt function and add the reciprocal.
|
||||
* (see above)
|
||||
*/
|
||||
|
||||
#if ENABLED(DELTA_FAST_SQRT) && defined(__AVR__)
|
||||
/**
|
||||
* Fast inverse sqrt from Quake III Arena
|
||||
* See: https://en.wikipedia.org/wiki/Fast_inverse_square_root
|
||||
*/
|
||||
float Q_rsqrt(float number) {
|
||||
long i;
|
||||
float x2, y;
|
||||
const float threehalfs = 1.5f;
|
||||
x2 = number * 0.5f;
|
||||
y = number;
|
||||
i = * ( long * ) &y; // evil floating point bit level hacking
|
||||
i = 0x5F3759DF - ( i >> 1 ); // what the f***?
|
||||
y = * ( float * ) &i;
|
||||
y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
|
||||
// y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed
|
||||
return y;
|
||||
}
|
||||
#endif
|
||||
|
||||
#define DELTA_DEBUG(VAR) do { \
|
||||
SERIAL_ECHOPAIR("cartesian X:", VAR[X_AXIS]); \
|
||||
SERIAL_ECHOPAIR(" Y:", VAR[Y_AXIS]); \
|
||||
|
@ -64,19 +64,8 @@ void recalc_delta_settings();
|
||||
* (see above)
|
||||
*/
|
||||
|
||||
#if ENABLED(DELTA_FAST_SQRT) && defined(__AVR__)
|
||||
/**
|
||||
* Fast inverse sqrt from Quake III Arena
|
||||
* See: https://en.wikipedia.org/wiki/Fast_inverse_square_root
|
||||
*/
|
||||
float Q_rsqrt(float number);
|
||||
#define _SQRT(n) (1.0f / Q_rsqrt(n))
|
||||
#else
|
||||
#define _SQRT(n) SQRT(n)
|
||||
#endif
|
||||
|
||||
// Macro to obtain the Z position of an individual tower
|
||||
#define DELTA_Z(V,T) V[Z_AXIS] + _SQRT( \
|
||||
#define DELTA_Z(V,T) V[Z_AXIS] + SQRT( \
|
||||
delta_diagonal_rod_2_tower[T] - HYPOT2( \
|
||||
delta_tower[T][X_AXIS] - V[X_AXIS], \
|
||||
delta_tower[T][Y_AXIS] - V[Y_AXIS] \
|
||||
|
Loading…
Reference in New Issue
Block a user