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std::fma

Da cppreference.com.
< cpp‎ | numeric‎ | math

 
 
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remainder(C++11)
remquo(C++11)
fma(C++11)
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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C++11)
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Defined in header <cmath>
float       fma( float x, float y, float z );
(1) (dal C++11)
double      fma( double x, double y, double z );
(2) (dal C++11)
long double fma( long double x, long double y, long double z );
(3) (dal C++11)
Promoted    fma( Arithmetic x, Arithmetic y, Arithmetic z );
(4) (dal C++11)
#define FP_FAST_FMA  /* implementation-defined */
(5) (dal C++11)
#define FP_FAST_FMAF /* implementation-defined */
(6) (dal C++11)
#define FP_FAST_FMAL /* implementation-defined */
(7) (dal C++11)
Le funzioni fma calcolare (x*y) + z, arrotondato come un'operazione ternaria, secondo il
Original:
The fma functions compute (x*y) + z, rounded as one ternary operation, according to the
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modalità di arrotondamento caratterizzato dal valore di FLT_ROUNDS.
Original:
rounding mode characterized by the value of FLT_ROUNDS.
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4)
Se un qualsiasi argomento è di tipo integrale, il cast double. Se qualsiasi altro argomento è long double, quindi il tipo di ritorno è long double, altrimenti è double.
Original:
If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double.
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5-7)
Se le costanti macro FP_FAST_FMAF, FP_FAST_FMA o FP_FAST_FMAL sono definiti, il std::fma funzione valuta più veloce l'espressione x*y+z per float, double e argomenti long double, rispettivamente. Se definito, queste macro restituiscono 1 intero.
Original:
If the macro constants FP_FAST_FMAF, FP_FAST_FMA, or FP_FAST_FMAL are defined, the function std::fma evaluates faster than the expression x*y+z for float, double, and long double arguments, respectively. If defined, these macros evaluate to integer 1.
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[modifica] Parametri

x, y, z -
valori in virgola mobile
Original:
floating point values
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[modifica] Valore di ritorno

(x*y) + z, arrotondato come un'unica operazione ternaria
Original:
(x*y) + z, rounded as one ternary operation
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[modifica] Vedi anche

(C++11)
firmato resto della divisione
Original:
signed remainder of the division operation
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(funzione) [edit]
(C++11)
firmato restante nonché gli ultimi tre bit della operazione di divisione
Original:
signed remainder as well as the three last bits of the division operation
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(funzione) [edit]