GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.1 |
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fma(3) |
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fma, fmaf, fmal − floating-point multiply and add
#include <math.h>
double
fma(double x, double y,
double z);
float fmaf(float x, float y,
float z);
long double fmal(long double x, long
double y, long double
z);
Compile with −std=c99; link with −lm.
The fma() function computes x * y + z. The result is rounded according to the rounding mode determined by the value of FLT_ROUNDS. FLT_ROUNDS indicates the implementation-defined rounding behaviour for floating-point addition, and has one of the following values:
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−1 |
The rounding mode is not determinable. |
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0 |
Rounding is towards 0. |
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1 |
Rounding is towards nearest number. |
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2 |
Rounding is towards positive infinity. |
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3 |
Rounding is towards negative infinity. |
Other values represent machine-dependent, non-standard rounding modes.
C99
fenv(3), remainder(3), remquo(3)
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fma(3) | |