1/*
2 * ARM load/store instructions for code (armeb-user support)
3 *
4 * Copyright (c) 2012 CodeSourcery, LLC
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#ifndef ARM_LDST_H
21#define ARM_LDST_H
22
23#include "exec/cpu_ldst.h"
24#include "qemu/bswap.h"
25
26/* Load an instruction and return it in the standard little-endian order */
27static inline uint32_t arm_ldl_code(CPUARMState *env, target_ulong addr,
28 bool sctlr_b)
29{
30 uint32_t insn = cpu_ldl_code(env, addr);
31 if (bswap_code(sctlr_b)) {
32 return bswap32(insn);
33 }
34 return insn;
35}
36
37/* Ditto, for a halfword (Thumb) instruction */
38static inline uint16_t arm_lduw_code(CPUARMState *env, target_ulong addr,
39 bool sctlr_b)
40{
41 uint16_t insn;
42#ifndef CONFIG_USER_ONLY
43 /* In big-endian (BE32) mode, adjacent Thumb instructions have been swapped
44 within each word. Undo that now. */
45 if (sctlr_b) {
46 addr ^= 2;
47 }
48#endif
49 insn = cpu_lduw_code(env, addr);
50 if (bswap_code(sctlr_b)) {
51 return bswap16(insn);
52 }
53 return insn;
54}
55
56#endif
57