SinCosLUT.c File Reference

Prototypes
void	XLALSinCosLUTInit (void)
int	XLALSinCosLUT (REAL4 *sinx, REAL4 *cosx, REAL8 x)
	Calculate sin(x) and cos(x) to roughly 1e-7 precision using a lookup-table and Taylor-expansion. More...
int	XLALSinCos2PiLUT (REAL4 *sin2pix, REAL4 *cos2pix, REAL8 x)
	Calculate sin(2*pi*x) and cos(2*pi*x) to roughly 1e-7 precision using a lookup-table and Taylor-expansion. More...
int	XLALSinCos2PiLUTtrimmed (REAL4 *s, REAL4 *c, REAL8 x)
	A function that uses the lookup tables to evaluate sin and cos values of 2*Pi*x, but relies on x being already trimmed to the interval [0..2) More...

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Macros
#define	OOTWOPI   (1.0 / LAL_TWOPI)
#define	unlikely(x)   __builtin_expect((x),0)

Variables
static BOOLEAN	haveLUT = 0
UNUSED REAL4	sincosLUTbase [SINCOS_LUT_RES+SINCOS_LUT_RES/4]
UNUSED REAL4	sincosLUTdiff [SINCOS_LUT_RES+SINCOS_LUT_RES/4]

Macro Definition Documentation

OOTWOPI

#define OOTWOPI   (1.0 / LAL_TWOPI)

Definition at line 26 of file SinCosLUT.c.

unlikely

#define unlikely

(

x

)

__builtin_expect((x),0)

Definition at line 29 of file SinCosLUT.c.

Variable Documentation

haveLUT

BOOLEAN haveLUT = 0

static

Definition at line 37 of file SinCosLUT.c.

sincosLUTbase

UNUSED REAL4 sincosLUTbase[SINCOS_LUT_RES+SINCOS_LUT_RES/4]

Definition at line 40 of file SinCosLUT.c.

sincosLUTdiff

UNUSED REAL4 sincosLUTdiff[SINCOS_LUT_RES+SINCOS_LUT_RES/4]

Definition at line 41 of file SinCosLUT.c.