1 /* 2 * Single-precision vector sincos function. 3 * 4 * Copyright (c) 2023-2024, Arm Limited. 5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception 6 */ 7 8 /* Define _GNU_SOURCE in order to include sincosf declaration. If building 9 pre-GLIBC 2.1, or on a non-GNU conforming system, this routine will need to 10 be linked against the scalar sincosf from math/. */ 11 #define _GNU_SOURCE 12 13 #include "sv_math.h" 14 #include "sv_sincosf_common.h" 15 #include "test_defs.h" 16 17 #include <math.h> 18 19 /* sincos not available for all scalar libm implementations. */ 20 #ifndef __GLIBC__ 21 static void 22 sincosf (float x, float *out_sin, float *out_cos) 23 { 24 *out_sin = sinf (x); 25 *out_cos = cosf (x); 26 } 27 #endif 28 29 static void NOINLINE 30 special_case (svfloat32_t x, svbool_t special, float *out_sin, float *out_cos) 31 { 32 svbool_t p = svptrue_pat_b32 (SV_VL1); 33 for (int i = 0; i < svcntw (); i++) 34 { 35 if (svptest_any (special, p)) 36 sincosf (svlastb (p, x), out_sin + i, out_cos + i); 37 p = svpnext_b32 (svptrue_b32 (), p); 38 } 39 } 40 41 /* Single-precision vector function allowing calculation of both sin and cos in 42 one function call, using shared argument reduction and separate low-order 43 polynomials. 44 Worst-case error for sin is 1.67 ULP: 45 sv_sincosf_sin(0x1.c704c4p+19) got 0x1.fff698p-5 want 0x1.fff69cp-5 46 Worst-case error for cos is 1.81 ULP: 47 sv_sincosf_cos(0x1.e506fp+19) got -0x1.ffec6ep-6 want -0x1.ffec72p-6. */ 48 void 49 _ZGVsMxvl4l4_sincosf (svfloat32_t x, float *out_sin, float *out_cos, 50 svbool_t pg) 51 { 52 const struct sv_sincosf_data *d = ptr_barrier (&sv_sincosf_data); 53 svbool_t special = check_ge_rangeval (pg, x, d); 54 55 svfloat32x2_t sc = sv_sincosf_inline (pg, x, d); 56 57 svst1_f32 (pg, out_sin, svget2 (sc, 0)); 58 svst1_f32 (pg, out_cos, svget2 (sc, 1)); 59 60 if (unlikely (svptest_any (pg, special))) 61 special_case (x, special, out_sin, out_cos); 62 } 63 64 TEST_DISABLE_FENV (_ZGVsMxv_sincosf_sin) 65 TEST_DISABLE_FENV (_ZGVsMxv_sincosf_cos) 66 TEST_ULP (_ZGVsMxv_sincosf_sin, 1.17) 67 TEST_ULP (_ZGVsMxv_sincosf_cos, 1.31) 68 #define SV_SINCOSF_INTERVAL(lo, hi, n) \ 69 TEST_SYM_INTERVAL (_ZGVsMxv_sincosf_sin, lo, hi, n) \ 70 TEST_SYM_INTERVAL (_ZGVsMxv_sincosf_cos, lo, hi, n) 71 SV_SINCOSF_INTERVAL (0, 0x1p-31, 50000) 72 SV_SINCOSF_INTERVAL (0x1p-31, 0x1p20, 500000) 73 SV_SINCOSF_INTERVAL (0x1p20, inf, 10000) 74 CLOSE_SVE_ATTR 75