]>
Commit | Line | Data |
---|---|---|
fed50ffd PMD |
1 | /* |
2 | * MIPS SIMD Architecture Module Instruction emulation helpers for QEMU. | |
3 | * | |
4 | * Copyright (c) 2014 Imagination Technologies | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "cpu.h" | |
22 | #include "internal.h" | |
23 | #include "fpu/softfloat.h" | |
24 | #include "fpu_helper.h" | |
25 | ||
26 | void msa_reset(CPUMIPSState *env) | |
27 | { | |
28 | if (!ase_msa_available(env)) { | |
29 | return; | |
30 | } | |
31 | ||
32 | #ifdef CONFIG_USER_ONLY | |
33 | /* MSA access enabled */ | |
34 | env->CP0_Config5 |= 1 << CP0C5_MSAEn; | |
35 | env->CP0_Status |= (1 << CP0St_CU1) | (1 << CP0St_FR); | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * MSA CSR: | |
40 | * - non-signaling floating point exception mode off (NX bit is 0) | |
41 | * - Cause, Enables, and Flags are all 0 | |
42 | * - round to nearest / ties to even (RM bits are 0) | |
43 | */ | |
44 | env->active_tc.msacsr = 0; | |
45 | ||
46 | restore_msa_fp_status(env); | |
47 | ||
48 | /* tininess detected after rounding.*/ | |
49 | set_float_detect_tininess(float_tininess_after_rounding, | |
50 | &env->active_tc.msa_fp_status); | |
51 | ||
52 | /* clear float_status exception flags */ | |
53 | set_float_exception_flags(0, &env->active_tc.msa_fp_status); | |
54 | ||
55 | /* clear float_status nan mode */ | |
56 | set_default_nan_mode(0, &env->active_tc.msa_fp_status); | |
57 | ||
58 | /* set proper signanling bit meaning ("1" means "quiet") */ | |
59 | set_snan_bit_is_one(0, &env->active_tc.msa_fp_status); | |
60 | } |