diff options
Diffstat (limited to 'lib/sign.c')
| -rw-r--r-- | lib/sign.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/sign.c b/lib/sign.c new file mode 100644 index 0000000..d6b1aaf --- /dev/null +++ b/lib/sign.c @@ -0,0 +1,41 @@ +// Sign +// +// sign - sgn +// +// ⎧ -1 if x < 0 +// f( x ) = ⎨ 0 if x = 0 +// ⎩ 1 if x > 0 +// +// X_n - 1 +// Y_n - 1 +// C_n - 0 + + +#include "ts.h" + + + +ts_parameter_t const ts_sign_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 }; + + +uint_t ts_sign_offset( ts_constant_t const *c ) +{ + ( void )c; + return ( 0 ); +} + +int ts_sign( + fp_t * const *y, uint_t y_n, + fp_t const * const *x, uint_t x_n, + uint_t n, ts_constant_t const *c +) +{ + TS_PROLOGUE( ts_sign_p ); + (void)c; + for( uint_t i = 0; i < n; ++i ) + { + y[0][i] = ( x[0][i] > 0 ) - ( x[0][i] < 0 ); + } + return 0; +} + |