| /* |
| * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef _IMMEDIATE_H |
| #define _IMMEDIATE_H |
| |
| #include <sys/types.h> |
| |
| /* |
| * functions to map backwards and forwards between logical or floating |
| * point immediates and their corresponding encodings. the mapping |
| * from encoding to immediate is required by the simulator. the reverse |
| * mapping is required by the OpenJDK assembler. |
| * |
| * a logical immediate value supplied to or returned from a map lookup |
| * is always 64 bits. this is sufficient for looking up 32 bit |
| * immediates or their encodings since a 32 bit immediate has the same |
| * encoding as the 64 bit immediate produced by concatenating the |
| * immediate with itself. |
| * |
| * a logical immediate encoding is 13 bits N:immr:imms (3 fields of |
| * widths 1:6:6 -- see the arm spec). they appear as bits [22:10] of a |
| * logical immediate instruction. encodings are supplied and returned |
| * as 32 bit values. if a given 13 bit immediate has no corresponding |
| * encoding then a map lookup will return 0xffffffff. |
| */ |
| |
| u_int64_t logical_immediate_for_encoding(u_int32_t encoding); |
| u_int32_t encoding_for_logical_immediate(u_int64_t immediate); |
| u_int64_t fp_immediate_for_encoding(u_int32_t imm8, int is_dp); |
| u_int32_t encoding_for_fp_immediate(float immediate); |
| |
| #endif // _IMMEDIATE_H |
