/*
 * libbinrec: a recompiling translator for machine code
 * Copyright (c) 2016 Andrew Church <achurch@achurch.org>
 *
 * This software may be copied and redistributed under certain conditions;
 * see the file "COPYING" in the source code distribution for details.
 * NO WARRANTY is provided with this software.
 */

#include "tests/common.h"
#include "tests/host-x86/common.h"


static const binrec_setup_t setup = {
    .host = BINREC_ARCH_X86_64_SYSV,
};
static const unsigned int host_opt = BINREC_OPT_H_X86_ADDRESS_OPERANDS;

static int add_rtl(RTLUnit *unit)
{
    int dummy_regs[3];
    for (int i = 0; i < lenof(dummy_regs); i++) {
        EXPECT(dummy_regs[i] = rtl_alloc_register(unit, RTLTYPE_INT32));
        EXPECT(rtl_add_insn(unit, RTLOP_NOP, dummy_regs[i], 0, 0, 0));
    }

    int reg1, reg2;
    EXPECT(reg1 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg1, 0, 0, 1));
    EXPECT(reg2 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg2, 0, 0, 2));
    /* Should get an empty REX prefix. */
    EXPECT(rtl_add_insn(unit, RTLOP_STORE_I8, 0, reg1, reg2, 0));

    /* Also check that no extraneous REX is added if the base or index
     * register requires REX. */
    int reg3, reg4, reg5;
    EXPECT(reg3 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg3, 0, 0, 3));
    EXPECT(rtl_add_insn(unit, RTLOP_STORE_I8, 0, reg3, reg2, 0));
    for (int i = 0; i < lenof(dummy_regs); i++) {
        EXPECT(rtl_add_insn(unit, RTLOP_NOP, 0, dummy_regs[i], 0, 0));
    }
    EXPECT(reg4 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg4, 0, 0, 4));
    EXPECT(reg5 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_ADD, reg5, reg4, reg3, 0));
    EXPECT(rtl_add_insn(unit, RTLOP_STORE_I8, 0, reg5, reg2, 0));

    EXPECT(rtl_add_insn(unit, RTLOP_NOP, 0, reg1, reg2, 0));
    EXPECT(rtl_add_insn(unit, RTLOP_NOP, 0, reg3, reg4, 0));

    return EXIT_SUCCESS;
}

static const uint8_t expected_code[] = {
    0x48,0x83,0xEC,0x08,                // sub $8,%rsp
    0xBE,0x01,0x00,0x00,0x00,           // mov $1,%esi
    0xBF,0x02,0x00,0x00,0x00,           // mov $2,%edi
    0x40,0x88,0x3E,                     // mov %dil,(%rsi)
    0x41,0xB8,0x03,0x00,0x00,0x00,      // mov $3,%r8d
    0x41,0x88,0x38,                     // mov %dil,(%r8)
    0xB8,0x04,0x00,0x00,0x00,           // mov $4,%eax
    0x42,0x88,0x3C,0x00,                // mov %dil,(%rax,%r8)
    0x48,0x83,0xC4,0x08,                // add $8,%rsp
    0xC3,                               // ret
};

static const char expected_log[] =
    #ifdef RTL_DEBUG_OPTIMIZE
        "[info] Killing instruction 12\n"
    #endif
    "";

#include "tests/rtl-translate-test.i"