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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/*
* Table of relevant information about how to decode the ModR/M byte.
* Based on information in the IA 32 Intel Architecture
* Software Developer's Manual Volume 2: Instruction Set Reference.
*/
#include "mini_disassembler.h"
#include "mini_disassembler_types.h"
namespace sidestep {
const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
// mod == 00
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { true, false, OS_WORD },
/* r/m == 111 */ { false, false, OS_ZERO },
// mod == 01
/* r/m == 000 */ { true, false, OS_BYTE },
/* r/m == 001 */ { true, false, OS_BYTE },
/* r/m == 010 */ { true, false, OS_BYTE },
/* r/m == 011 */ { true, false, OS_BYTE },
/* r/m == 100 */ { true, false, OS_BYTE },
/* r/m == 101 */ { true, false, OS_BYTE },
/* r/m == 110 */ { true, false, OS_BYTE },
/* r/m == 111 */ { true, false, OS_BYTE },
// mod == 10
/* r/m == 000 */ { true, false, OS_WORD },
/* r/m == 001 */ { true, false, OS_WORD },
/* r/m == 010 */ { true, false, OS_WORD },
/* r/m == 011 */ { true, false, OS_WORD },
/* r/m == 100 */ { true, false, OS_WORD },
/* r/m == 101 */ { true, false, OS_WORD },
/* r/m == 110 */ { true, false, OS_WORD },
/* r/m == 111 */ { true, false, OS_WORD },
// mod == 11
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO }
};
const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
// mod == 00
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, true, OS_ZERO },
/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO },
// mod == 01
/* r/m == 000 */ { true, false, OS_BYTE },
/* r/m == 001 */ { true, false, OS_BYTE },
/* r/m == 010 */ { true, false, OS_BYTE },
/* r/m == 011 */ { true, false, OS_BYTE },
/* r/m == 100 */ { true, true, OS_BYTE },
/* r/m == 101 */ { true, false, OS_BYTE },
/* r/m == 110 */ { true, false, OS_BYTE },
/* r/m == 111 */ { true, false, OS_BYTE },
// mod == 10
/* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
// mod == 11
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO },
};
}; // namespace sidestep
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