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36 /* -------------------------------------------------------------- */
37 /* PROLOG END TAG zYx */
38 #ifdef __SPU__
39 #ifndef _SINCOSF4_H_
40 #define _SINCOSF4_H_ 1
41
42 #include <spu_intrinsics.h>
43
44 #include "cos_sin.h"
45
46 /*
47 * FUNCTION
48 * vector void _sincosf4(vector float angle, vector float *sx, vector float *cx)
49 *
50 * DESCRIPTION
51 * The _sincosf4 function computes the sine and cosine of a vector of
52 * angles (expressed in radians) to an accuracy of a single precision
53 * floating point.
54 *
55 */
56
_sincosf4(vector float angle,vector float * sinx,vector float * cosx)57 static __inline void _sincosf4(vector float angle,
58 vector float *sinx,
59 vector float *cosx)
60 {
61
62 vec_int4 octant;
63 vec_uint4 select;
64 vec_float4 cos, sin;
65 vec_float4 toggle_sign;
66
67 /* Range reduce the input angle x into the range -PI/4 to PI/4
68 * by performing simple modulus.
69 */
70 MOD_PI_OVER_FOUR_F(angle, octant);
71
72 /* Compute the cosine and sine of the range reduced input.
73 */
74 COMPUTE_COS_SIN_F(angle, cos, sin);
75
76 select = spu_cmpeq(spu_and(octant, 2), 0);
77
78 toggle_sign = (vec_float4)spu_sl(spu_and(octant, 4), 29);
79 *sinx = spu_xor(spu_sel(cos, sin, select), toggle_sign);
80
81 toggle_sign = (vec_float4)spu_sl(spu_and(spu_add(octant, 2), 4), 29);
82 *cosx = spu_xor(spu_sel(sin, cos, select), toggle_sign);
83
84 return;
85 }
86
87 #endif /* _SINCOSF4_H_ */
88 #endif /* __SPU__ */
89
