1 /* 2 * Single-precision vector modf(x, *y) function. 3 * 4 * Copyright (c) 2024, Arm Limited. 5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception 6 */ 7 8 #include "v_math.h" 9 #include "test_sig.h" 10 #include "test_defs.h" 11 12 /* Modff algorithm. Produces exact values in all rounding modes. */ 13 float32x4_t VPCS_ATTR NOINLINE V_NAME_F1_L1 (modf) (float32x4_t x, 14 float *out_int) 15 { 16 /* Get integer component of x. */ 17 float32x4_t rounded = vrndq_f32 (x); 18 vst1q_f32 (out_int, rounded); 19 20 /* Subtract integer component from input. */ 21 uint32x4_t remaining = vreinterpretq_u32_f32 (vsubq_f32 (x, rounded)); 22 23 /* Return +0 for integer x. */ 24 uint32x4_t is_integer = vceqq_f32 (x, rounded); 25 return vreinterpretq_f32_u32 (vbicq_u32 (remaining, is_integer)); 26 } 27 28 TEST_ULP (_ZGVnN4vl4_modff_frac, 0.0) 29 TEST_SYM_INTERVAL (_ZGVnN4vl4_modff_frac, 0, 1, 20000) 30 TEST_SYM_INTERVAL (_ZGVnN4vl4_modff_frac, 1, inf, 20000) 31 32 TEST_ULP (_ZGVnN4vl4_modff_int, 0.0) 33 TEST_SYM_INTERVAL (_ZGVnN4vl4_modff_int, 0, 1, 20000) 34 TEST_SYM_INTERVAL (_ZGVnN4vl4_modff_int, 1, inf, 20000) 35