1*f3087befSAndrew Turner /*
2*f3087befSAndrew Turner * Double-precision vector sincospi function.
3*f3087befSAndrew Turner *
4*f3087befSAndrew Turner * Copyright (c) 2024, Arm Limited.
5*f3087befSAndrew Turner * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6*f3087befSAndrew Turner */
7*f3087befSAndrew Turner #include "v_sincospi_common.h"
8*f3087befSAndrew Turner #include "v_math.h"
9*f3087befSAndrew Turner #include "test_defs.h"
10*f3087befSAndrew Turner
11*f3087befSAndrew Turner /* Double-precision vector function allowing calculation of both sin and cos in
12*f3087befSAndrew Turner one function call, using separate argument reduction and shared low-order
13*f3087befSAndrew Turner polynomials.
14*f3087befSAndrew Turner Approximation for vector double-precision sincospi(x).
15*f3087befSAndrew Turner Maximum Error 3.09 ULP:
16*f3087befSAndrew Turner _ZGVnN2v_sincospi_sin(0x1.7a41deb4b21e1p+14) got 0x1.fd54d0b327cf1p-1
17*f3087befSAndrew Turner want 0x1.fd54d0b327cf4p-1
18*f3087befSAndrew Turner Maximum Error 3.16 ULP:
19*f3087befSAndrew Turner _ZGVnN2v_sincospi_cos(-0x1.11e3c7e284adep-5) got 0x1.fd2da484ff3ffp-1
20*f3087befSAndrew Turner want 0x1.fd2da484ff402p-1. */
21*f3087befSAndrew Turner VPCS_ATTR void
_ZGVnN2vl8l8_sincospi(float64x2_t x,double * out_sin,double * out_cos)22*f3087befSAndrew Turner _ZGVnN2vl8l8_sincospi (float64x2_t x, double *out_sin, double *out_cos)
23*f3087befSAndrew Turner {
24*f3087befSAndrew Turner const struct v_sincospi_data *d = ptr_barrier (&v_sincospi_data);
25*f3087befSAndrew Turner
26*f3087befSAndrew Turner float64x2x2_t sc = v_sincospi_inline (x, d);
27*f3087befSAndrew Turner
28*f3087befSAndrew Turner vst1q_f64 (out_sin, sc.val[0]);
29*f3087befSAndrew Turner vst1q_f64 (out_cos, sc.val[1]);
30*f3087befSAndrew Turner }
31*f3087befSAndrew Turner
32*f3087befSAndrew Turner #if WANT_TRIGPI_TESTS
33*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN2v_sincospi_cos)
34*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN2v_sincospi_sin)
35*f3087befSAndrew Turner TEST_ULP (_ZGVnN2v_sincospi_sin, 2.59)
36*f3087befSAndrew Turner TEST_ULP (_ZGVnN2v_sincospi_cos, 2.66)
37*f3087befSAndrew Turner # define V_SINCOSPI_INTERVAL(lo, hi, n) \
38*f3087befSAndrew Turner TEST_SYM_INTERVAL (_ZGVnN2v_sincospi_sin, lo, hi, n) \
39*f3087befSAndrew Turner TEST_SYM_INTERVAL (_ZGVnN2v_sincospi_cos, lo, hi, n)
40*f3087befSAndrew Turner V_SINCOSPI_INTERVAL (0, 0x1p-63, 10000)
41*f3087befSAndrew Turner V_SINCOSPI_INTERVAL (0x1p-63, 0.5, 50000)
42*f3087befSAndrew Turner V_SINCOSPI_INTERVAL (0.5, 0x1p63, 50000)
43*f3087befSAndrew Turner V_SINCOSPI_INTERVAL (0x1p63, inf, 10000)
44*f3087befSAndrew Turner #endif
45