1*f3087befSAndrew Turner /*
2*f3087befSAndrew Turner * Double-precision vector cexpi function.
3*f3087befSAndrew Turner *
4*f3087befSAndrew Turner * Copyright (c) 2023-2024, Arm Limited.
5*f3087befSAndrew Turner * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6*f3087befSAndrew Turner */
7*f3087befSAndrew Turner
8*f3087befSAndrew Turner #include "sv_math.h"
9*f3087befSAndrew Turner #include "sv_sincos_common.h"
10*f3087befSAndrew Turner #include "test_defs.h"
11*f3087befSAndrew Turner
12*f3087befSAndrew Turner static svfloat64x2_t NOINLINE
special_case(svfloat64_t x,svbool_t special,svfloat64x2_t y)13*f3087befSAndrew Turner special_case (svfloat64_t x, svbool_t special, svfloat64x2_t y)
14*f3087befSAndrew Turner {
15*f3087befSAndrew Turner return svcreate2 (sv_call_f64 (sin, x, svget2 (y, 0), special),
16*f3087befSAndrew Turner sv_call_f64 (cos, x, svget2 (y, 1), special));
17*f3087befSAndrew Turner }
18*f3087befSAndrew Turner
19*f3087befSAndrew Turner /* Double-precision vector function allowing calculation of both sin and cos in
20*f3087befSAndrew Turner one function call, using shared argument reduction and separate polynomials.
21*f3087befSAndrew Turner Largest observed error is for sin, 3.22 ULP:
22*f3087befSAndrew Turner sv_cexpi_sin (0x1.d70eef40f39b1p+12) got -0x1.ffe9537d5dbb7p-3
23*f3087befSAndrew Turner want -0x1.ffe9537d5dbb4p-3. */
24*f3087befSAndrew Turner svfloat64x2_t
_ZGVsMxv_cexpi(svfloat64_t x,svbool_t pg)25*f3087befSAndrew Turner _ZGVsMxv_cexpi (svfloat64_t x, svbool_t pg)
26*f3087befSAndrew Turner {
27*f3087befSAndrew Turner const struct sv_sincos_data *d = ptr_barrier (&sv_sincos_data);
28*f3087befSAndrew Turner svbool_t special = check_ge_rangeval (pg, x, d);
29*f3087befSAndrew Turner
30*f3087befSAndrew Turner svfloat64x2_t sc = sv_sincos_inline (pg, x, d);
31*f3087befSAndrew Turner
32*f3087befSAndrew Turner if (unlikely (svptest_any (pg, special)))
33*f3087befSAndrew Turner return special_case (x, special, sc);
34*f3087befSAndrew Turner return sc;
35*f3087befSAndrew Turner }
36*f3087befSAndrew Turner
37*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVsMxv_cexpi_sin)
38*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVsMxv_cexpi_cos)
39*f3087befSAndrew Turner TEST_ULP (_ZGVsMxv_cexpi_sin, 2.73)
40*f3087befSAndrew Turner TEST_ULP (_ZGVsMxv_cexpi_cos, 2.73)
41*f3087befSAndrew Turner #define SV_CEXPI_INTERVAL(lo, hi, n) \
42*f3087befSAndrew Turner TEST_INTERVAL (_ZGVsMxv_cexpi_sin, lo, hi, n) \
43*f3087befSAndrew Turner TEST_INTERVAL (_ZGVsMxv_cexpi_cos, lo, hi, n)
44*f3087befSAndrew Turner SV_CEXPI_INTERVAL (0, 0x1p23, 500000)
45*f3087befSAndrew Turner SV_CEXPI_INTERVAL (-0, -0x1p23, 500000)
46*f3087befSAndrew Turner SV_CEXPI_INTERVAL (0x1p23, inf, 10000)
47*f3087befSAndrew Turner SV_CEXPI_INTERVAL (-0x1p23, -inf, 10000)
48*f3087befSAndrew Turner CLOSE_SVE_ATTR
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