1 /*
2 * Single-precision vector cexpi function.
3 *
4 * Copyright (c) 2023, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6 */
7
8 #include "sv_sincosf_common.h"
9 #include "sv_math.h"
10 #include "pl_test.h"
11
12 static svfloat32x2_t NOINLINE
special_case(svfloat32_t x,svbool_t special,svfloat32x2_t y)13 special_case (svfloat32_t x, svbool_t special, svfloat32x2_t y)
14 {
15 return svcreate2 (sv_call_f32 (sinf, x, svget2 (y, 0), special),
16 sv_call_f32 (cosf, x, svget2 (y, 1), special));
17 }
18
19 /* Single-precision vector function allowing calculation of both sin and cos in
20 one function call, using shared argument reduction and separate low-order
21 polynomials.
22 Worst-case error for sin is 1.67 ULP:
23 v_cexpif_sin(0x1.c704c4p+19) got 0x1.fff698p-5 want 0x1.fff69cp-5
24 Worst-case error for cos is 1.81 ULP:
25 v_cexpif_cos(0x1.e506fp+19) got -0x1.ffec6ep-6 want -0x1.ffec72p-6. */
26 svfloat32x2_t
_ZGVsMxv_cexpif(svfloat32_t x,svbool_t pg)27 _ZGVsMxv_cexpif (svfloat32_t x, svbool_t pg)
28 {
29 const struct sv_sincosf_data *d = ptr_barrier (&sv_sincosf_data);
30 svbool_t special = check_ge_rangeval (pg, x, d);
31
32 svfloat32x2_t sc = sv_sincosf_inline (pg, x, d);
33
34 if (unlikely (svptest_any (pg, special)))
35 return special_case (x, special, sc);
36 return sc;
37 }
38
39 PL_TEST_ULP (_ZGVsMxv_cexpif_sin, 1.17)
40 PL_TEST_ULP (_ZGVsMxv_cexpif_cos, 1.31)
41 #define SV_CEXPIF_INTERVAL(lo, hi, n) \
42 PL_TEST_INTERVAL (_ZGVsMxv_cexpif_sin, lo, hi, n) \
43 PL_TEST_INTERVAL (_ZGVsMxv_cexpif_cos, lo, hi, n)
44 SV_CEXPIF_INTERVAL (0, 0x1p20, 500000)
45 SV_CEXPIF_INTERVAL (-0, -0x1p20, 500000)
46 SV_CEXPIF_INTERVAL (0x1p20, inf, 10000)
47 SV_CEXPIF_INTERVAL (-0x1p20, -inf, 10000)
48