]>
Commit | Line | Data |
---|---|---|
db432672 RH |
1 | /* |
2 | * Generic vector operation descriptor | |
3 | * | |
4 | * Copyright (c) 2018 Linaro | |
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 | |
fb0343d5 | 9 | * version 2.1 of the License, or (at your option) any later version. |
db432672 RH |
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 | ||
f91005e1 MA |
20 | #ifndef TCG_TCG_GVEC_DESC_H |
21 | #define TCG_TCG_GVEC_DESC_H | |
22 | ||
e2e7168a RH |
23 | /* |
24 | * This configuration allows MAXSZ to represent 2048 bytes, and | |
25 | * OPRSZ to match MAXSZ, or represent the smaller values 8, 16, or 32. | |
26 | * | |
27 | * Encode this with: | |
28 | * 0, 1, 3 -> 8, 16, 32 | |
29 | * 2 -> maxsz | |
30 | * | |
31 | * This steals the input that would otherwise map to 24 to match maxsz. | |
32 | */ | |
33 | #define SIMD_MAXSZ_SHIFT 0 | |
34 | #define SIMD_MAXSZ_BITS 8 | |
db432672 | 35 | |
e2e7168a RH |
36 | #define SIMD_OPRSZ_SHIFT (SIMD_MAXSZ_SHIFT + SIMD_MAXSZ_BITS) |
37 | #define SIMD_OPRSZ_BITS 2 | |
db432672 | 38 | |
e2e7168a | 39 | #define SIMD_DATA_SHIFT (SIMD_OPRSZ_SHIFT + SIMD_OPRSZ_BITS) |
db432672 RH |
40 | #define SIMD_DATA_BITS (32 - SIMD_DATA_SHIFT) |
41 | ||
42 | /* Create a descriptor from components. */ | |
43 | uint32_t simd_desc(uint32_t oprsz, uint32_t maxsz, int32_t data); | |
44 | ||
e2e7168a RH |
45 | /* Extract the max vector size from a descriptor. */ |
46 | static inline intptr_t simd_maxsz(uint32_t desc) | |
db432672 | 47 | { |
e2e7168a | 48 | return extract32(desc, SIMD_MAXSZ_SHIFT, SIMD_MAXSZ_BITS) * 8 + 8; |
db432672 RH |
49 | } |
50 | ||
e2e7168a RH |
51 | /* Extract the operation size from a descriptor. */ |
52 | static inline intptr_t simd_oprsz(uint32_t desc) | |
db432672 | 53 | { |
e2e7168a RH |
54 | uint32_t f = extract32(desc, SIMD_OPRSZ_SHIFT, SIMD_OPRSZ_BITS); |
55 | intptr_t o = f * 8 + 8; | |
56 | intptr_t m = simd_maxsz(desc); | |
57 | return f == 2 ? m : o; | |
db432672 RH |
58 | } |
59 | ||
60 | /* Extract the operation-specific data from a descriptor. */ | |
61 | static inline int32_t simd_data(uint32_t desc) | |
62 | { | |
63 | return sextract32(desc, SIMD_DATA_SHIFT, SIMD_DATA_BITS); | |
64 | } | |
f91005e1 MA |
65 | |
66 | #endif |