1*f3087befSAndrew Turner /* 2*f3087befSAndrew Turner * Single-precision vector sincos 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 /* Define _GNU_SOURCE in order to include sincosf declaration. If building 9*f3087befSAndrew Turner pre-GLIBC 2.1, or on a non-GNU conforming system, this routine will need to 10*f3087befSAndrew Turner be linked against the scalar sincosf from math/. */ 11*f3087befSAndrew Turner #define _GNU_SOURCE 12*f3087befSAndrew Turner #include <math.h> 13*f3087befSAndrew Turner 14*f3087befSAndrew Turner #include "v_sincosf_common.h" 15*f3087befSAndrew Turner #include "v_math.h" 16*f3087befSAndrew Turner #include "test_defs.h" 17*f3087befSAndrew Turner 18*f3087befSAndrew Turner /* sincos not available for all scalar libm implementations. */ 19*f3087befSAndrew Turner #if defined(_MSC_VER) || !defined(__GLIBC__) 20*f3087befSAndrew Turner static void 21*f3087befSAndrew Turner sincosf (float x, float *out_sin, float *out_cos) 22*f3087befSAndrew Turner { 23*f3087befSAndrew Turner *out_sin = sinf (x); 24*f3087befSAndrew Turner *out_cos = cosf (x); 25*f3087befSAndrew Turner } 26*f3087befSAndrew Turner #endif 27*f3087befSAndrew Turner 28*f3087befSAndrew Turner static void VPCS_ATTR NOINLINE 29*f3087befSAndrew Turner special_case (float32x4_t x, uint32x4_t special, float *out_sin, 30*f3087befSAndrew Turner float *out_cos) 31*f3087befSAndrew Turner { 32*f3087befSAndrew Turner for (int i = 0; i < 4; i++) 33*f3087befSAndrew Turner if (special[i]) 34*f3087befSAndrew Turner sincosf (x[i], out_sin + i, out_cos + i); 35*f3087befSAndrew Turner } 36*f3087befSAndrew Turner 37*f3087befSAndrew Turner /* Single-precision vector function allowing calculation of both sin and cos in 38*f3087befSAndrew Turner one function call, using shared argument reduction and separate low-order 39*f3087befSAndrew Turner polynomials. 40*f3087befSAndrew Turner Worst-case error for sin is 1.67 ULP: 41*f3087befSAndrew Turner v_sincosf_sin(0x1.c704c4p+19) got 0x1.fff698p-5 want 0x1.fff69cp-5 42*f3087befSAndrew Turner Worst-case error for cos is 1.81 ULP: 43*f3087befSAndrew Turner v_sincosf_cos(0x1.e506fp+19) got -0x1.ffec6ep-6 want -0x1.ffec72p-6. */ 44*f3087befSAndrew Turner VPCS_ATTR void 45*f3087befSAndrew Turner _ZGVnN4vl4l4_sincosf (float32x4_t x, float *out_sin, float *out_cos) 46*f3087befSAndrew Turner { 47*f3087befSAndrew Turner const struct v_sincosf_data *d = ptr_barrier (&v_sincosf_data); 48*f3087befSAndrew Turner uint32x4_t special = check_ge_rangeval (x, d); 49*f3087befSAndrew Turner 50*f3087befSAndrew Turner float32x4x2_t sc = v_sincosf_inline (x, d); 51*f3087befSAndrew Turner 52*f3087befSAndrew Turner vst1q_f32 (out_sin, sc.val[0]); 53*f3087befSAndrew Turner vst1q_f32 (out_cos, sc.val[1]); 54*f3087befSAndrew Turner 55*f3087befSAndrew Turner if (unlikely (v_any_u32 (special))) 56*f3087befSAndrew Turner special_case (x, special, out_sin, out_cos); 57*f3087befSAndrew Turner } 58*f3087befSAndrew Turner 59*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN4v_sincosf_sin) 60*f3087befSAndrew Turner TEST_DISABLE_FENV (_ZGVnN4v_sincosf_cos) 61*f3087befSAndrew Turner TEST_ULP (_ZGVnN4v_sincosf_sin, 1.17) 62*f3087befSAndrew Turner TEST_ULP (_ZGVnN4v_sincosf_cos, 1.31) 63*f3087befSAndrew Turner #define V_SINCOSF_INTERVAL(lo, hi, n) \ 64*f3087befSAndrew Turner TEST_INTERVAL (_ZGVnN4v_sincosf_sin, lo, hi, n) \ 65*f3087befSAndrew Turner TEST_INTERVAL (_ZGVnN4v_sincosf_cos, lo, hi, n) 66*f3087befSAndrew Turner V_SINCOSF_INTERVAL (0, 0x1p-31, 50000) 67*f3087befSAndrew Turner V_SINCOSF_INTERVAL (0x1p-31, 0x1p20, 500000) 68*f3087befSAndrew Turner V_SINCOSF_INTERVAL (0x1p20, inf, 10000) 69