tcg-gvec-desc.h (2103B)
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 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 #ifndef TCG_TCG_GVEC_DESC_H 21 #define TCG_TCG_GVEC_DESC_H 22 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 35 36 #define SIMD_OPRSZ_SHIFT (SIMD_MAXSZ_SHIFT + SIMD_MAXSZ_BITS) 37 #define SIMD_OPRSZ_BITS 2 38 39 #define SIMD_DATA_SHIFT (SIMD_OPRSZ_SHIFT + SIMD_OPRSZ_BITS) 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 45 /* Extract the max vector size from a descriptor. */ 46 static inline intptr_t simd_maxsz(uint32_t desc) 47 { 48 return extract32(desc, SIMD_MAXSZ_SHIFT, SIMD_MAXSZ_BITS) * 8 + 8; 49 } 50 51 /* Extract the operation size from a descriptor. */ 52 static inline intptr_t simd_oprsz(uint32_t desc) 53 { 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; 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 } 65 66 #endif