1 /* 2 * QEMU RISC-V CPU -- internal functions and types 3 * 4 * Copyright (c) 2020 T-Head Semiconductor Co., Ltd. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2 or later, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #ifndef RISCV_CPU_INTERNALS_H 20 #define RISCV_CPU_INTERNALS_H 21 22 #include "hw/registerfields.h" 23 24 /* share data between vector helpers and decode code */ 25 FIELD(VDATA, MLEN, 0, 8) 26 FIELD(VDATA, VM, 8, 1) 27 FIELD(VDATA, LMUL, 9, 2) 28 FIELD(VDATA, NF, 11, 4) 29 FIELD(VDATA, WD, 11, 1) 30 31 /* float point classify helpers */ 32 target_ulong fclass_h(uint64_t frs1); 33 target_ulong fclass_s(uint64_t frs1); 34 target_ulong fclass_d(uint64_t frs1); 35 36 #define SEW8 0 37 #define SEW16 1 38 #define SEW32 2 39 #define SEW64 3 40 41 static inline uint64_t nanbox_s(float32 f) 42 { 43 return f | MAKE_64BIT_MASK(32, 32); 44 } 45 46 static inline float32 check_nanbox_s(uint64_t f) 47 { 48 uint64_t mask = MAKE_64BIT_MASK(32, 32); 49 50 if (likely((f & mask) == mask)) { 51 return (uint32_t)f; 52 } else { 53 return 0x7fc00000u; /* default qnan */ 54 } 55 } 56 57 #endif 58