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 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/* ??? These bit widths are set for ARM SVE, maxing out at 256 byte vectors. */ 21#define SIMD_OPRSZ_SHIFT 0 22#define SIMD_OPRSZ_BITS 5 23 24#define SIMD_MAXSZ_SHIFT (SIMD_OPRSZ_SHIFT + SIMD_OPRSZ_BITS) 25#define SIMD_MAXSZ_BITS 5 26 27#define SIMD_DATA_SHIFT (SIMD_MAXSZ_SHIFT + SIMD_MAXSZ_BITS) 28#define SIMD_DATA_BITS (32 - SIMD_DATA_SHIFT) 29 30/* Create a descriptor from components. */ 31uint32_t simd_desc(uint32_t oprsz, uint32_t maxsz, int32_t data); 32 33/* Extract the operation size from a descriptor. */ 34static inline intptr_t simd_oprsz(uint32_t desc) 35{ 36 return (extract32(desc, SIMD_OPRSZ_SHIFT, SIMD_OPRSZ_BITS) + 1) * 8; 37} 38 39/* Extract the max vector size from a descriptor. */ 40static inline intptr_t simd_maxsz(uint32_t desc) 41{ 42 return (extract32(desc, SIMD_MAXSZ_SHIFT, SIMD_MAXSZ_BITS) + 1) * 8; 43} 44 45/* Extract the operation-specific data from a descriptor. */ 46static inline int32_t simd_data(uint32_t desc) 47{ 48 return sextract32(desc, SIMD_DATA_SHIFT, SIMD_DATA_BITS); 49} 50