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 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