2 * QEMU RISC-V CPU -- internal functions and types
4 * Copyright (c) 2020 T-Head Semiconductor Co., Ltd. All rights reserved.
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.
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
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/>.
19 #ifndef RISCV_CPU_INTERNALS_H
20 #define RISCV_CPU_INTERNALS_H
22 #include "hw/registerfields.h"
24 /* share data between vector helpers and decode code */
25 FIELD(VDATA, VM, 0, 1)
26 FIELD(VDATA, LMUL, 1, 3)
27 FIELD(VDATA, NF, 4, 4)
28 FIELD(VDATA, WD, 4, 1)
30 /* float point classify helpers */
31 target_ulong fclass_h(uint64_t frs1);
32 target_ulong fclass_s(uint64_t frs1);
33 target_ulong fclass_d(uint64_t frs1);
35 #ifndef CONFIG_USER_ONLY
36 extern const VMStateDescription vmstate_riscv_cpu;
40 RISCV_FRM_RNE = 0, /* Round to Nearest, ties to Even */
41 RISCV_FRM_RTZ = 1, /* Round towards Zero */
42 RISCV_FRM_RDN = 2, /* Round Down */
43 RISCV_FRM_RUP = 3, /* Round Up */
44 RISCV_FRM_RMM = 4, /* Round to Nearest, ties to Max Magnitude */
45 RISCV_FRM_DYN = 7, /* Dynamic rounding mode */
46 RISCV_FRM_ROD = 8, /* Round to Odd */
49 static inline uint64_t nanbox_s(CPURISCVState *env, float32 f)
51 /* the value is sign-extended instead of NaN-boxing for zfinx */
52 if (RISCV_CPU(env_cpu(env))->cfg.ext_zfinx) {
55 return f | MAKE_64BIT_MASK(32, 32);
59 static inline float32 check_nanbox_s(CPURISCVState *env, uint64_t f)
61 /* Disable NaN-boxing check when enable zfinx */
62 if (RISCV_CPU(env_cpu(env))->cfg.ext_zfinx) {
66 uint64_t mask = MAKE_64BIT_MASK(32, 32);
68 if (likely((f & mask) == mask)) {
71 return 0x7fc00000u; /* default qnan */
75 static inline uint64_t nanbox_h(CPURISCVState *env, float16 f)
77 /* the value is sign-extended instead of NaN-boxing for zfinx */
78 if (RISCV_CPU(env_cpu(env))->cfg.ext_zfinx) {
81 return f | MAKE_64BIT_MASK(16, 48);
85 static inline float16 check_nanbox_h(CPURISCVState *env, uint64_t f)
87 /* Disable nanbox check when enable zfinx */
88 if (RISCV_CPU(env_cpu(env))->cfg.ext_zfinx) {
92 uint64_t mask = MAKE_64BIT_MASK(16, 48);
94 if (likely((f & mask) == mask)) {
97 return 0x7E00u; /* default qnan */