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 "v_sincosf_common.h" 9 #include "v_math.h" 10 #include "pl_test.h" 11 12 static float32x4x2_t VPCS_ATTR NOINLINE 13 special_case (float32x4_t x, uint32x4_t special, float32x4x2_t y) 14 { 15 return (float32x4x2_t){ v_call_f32 (sinf, x, y.val[0], special), 16 v_call_f32 (cosf, x, y.val[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 VPCS_ATTR float32x4x2_t 27 _ZGVnN4v_cexpif (float32x4_t x) 28 { 29 const struct v_sincosf_data *d = ptr_barrier (&v_sincosf_data); 30 uint32x4_t special = check_ge_rangeval (x, d); 31 32 float32x4x2_t sc = v_sincosf_inline (x, d); 33 34 if (unlikely (v_any_u32 (special))) 35 return special_case (x, special, sc); 36 return sc; 37 } 38 39 PL_TEST_ULP (_ZGVnN4v_cexpif_sin, 1.17) 40 PL_TEST_ULP (_ZGVnN4v_cexpif_cos, 1.31) 41 #define V_CEXPIF_INTERVAL(lo, hi, n) \ 42 PL_TEST_INTERVAL (_ZGVnN4v_cexpif_sin, lo, hi, n) \ 43 PL_TEST_INTERVAL (_ZGVnN4v_cexpif_cos, lo, hi, n) 44 V_CEXPIF_INTERVAL (0, 0x1p20, 500000) 45 V_CEXPIF_INTERVAL (-0, -0x1p20, 500000) 46 V_CEXPIF_INTERVAL (0x1p20, inf, 10000) 47 V_CEXPIF_INTERVAL (-0x1p20, -inf, 10000) 48