diff options
Diffstat (limited to 'pl/math/v_sincos_3u5.c')
-rw-r--r-- | pl/math/v_sincos_3u5.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/pl/math/v_sincos_3u5.c b/pl/math/v_sincos_3u5.c new file mode 100644 index 000000000000..6fc014c120b8 --- /dev/null +++ b/pl/math/v_sincos_3u5.c @@ -0,0 +1,57 @@ +/* + * Double-precision vector sincos function. + * + * Copyright (c) 2023, Arm Limited. + * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception + */ + +/* Define _GNU_SOURCE in order to include sincos declaration. If building + pre-GLIBC 2.1, or on a non-GNU conforming system, this routine will need to + be linked against the scalar sincosf from math/. */ +#define _GNU_SOURCE +#include <math.h> +#undef _GNU_SOURCE + +#include "v_math.h" +#include "pl_test.h" +#include "v_sincos_common.h" + +static void VPCS_ATTR NOINLINE +special_case (float64x2_t x, uint64x2_t special, double *out_sin, + double *out_cos) +{ + if (special[0]) + sincos (x[0], out_sin, out_cos); + if (special[1]) + sincos (x[1], out_sin + 1, out_cos + 1); +} + +/* Double-precision vector function allowing calculation of both sin and cos in + one function call, using shared argument reduction and separate polynomials. + Largest observed error is for sin, 3.22 ULP: + v_sincos_sin (0x1.d70eef40f39b1p+12) got -0x1.ffe9537d5dbb7p-3 + want -0x1.ffe9537d5dbb4p-3. */ +VPCS_ATTR void +_ZGVnN2vl8l8_sincos (float64x2_t x, double *out_sin, double *out_cos) +{ + const struct v_sincos_data *d = ptr_barrier (&v_sincos_data); + uint64x2_t special = check_ge_rangeval (x, d); + + float64x2x2_t sc = v_sincos_inline (x, d); + + vst1q_f64 (out_sin, sc.val[0]); + vst1q_f64 (out_cos, sc.val[1]); + + if (unlikely (v_any_u64 (special))) + special_case (x, special, out_sin, out_cos); +} + +PL_TEST_ULP (_ZGVnN2v_sincos_sin, 2.73) +PL_TEST_ULP (_ZGVnN2v_sincos_cos, 2.73) +#define V_SINCOS_INTERVAL(lo, hi, n) \ + PL_TEST_INTERVAL (_ZGVnN2v_sincos_sin, lo, hi, n) \ + PL_TEST_INTERVAL (_ZGVnN2v_sincos_cos, lo, hi, n) +V_SINCOS_INTERVAL (0, 0x1p23, 500000) +V_SINCOS_INTERVAL (-0, -0x1p23, 500000) +V_SINCOS_INTERVAL (0x1p23, inf, 10000) +V_SINCOS_INTERVAL (-0x1p23, -inf, 10000) |