/*
 * Tiny Code Generator for QEMU
 *
 * Copyright (c) 2021 WANG Xuerui <git@xen0n.name>
 *
 * Based on tcg/riscv/tcg-target.h
 *
 * Copyright (c) 2018 SiFive, Inc
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef LOONGARCH_TCG_TARGET_H
#define LOONGARCH_TCG_TARGET_H

/*
 * Loongson removed the (incomplete) 32-bit support from kernel and toolchain
 * for the initial upstreaming of this architecture, so don't bother and just
 * support the LP64* ABI for now.
 */
#if defined(__loongarch64)
# define TCG_TARGET_REG_BITS 64
#else
# error unsupported LoongArch register size
#endif

#define TCG_TARGET_INSN_UNIT_SIZE 4
#define TCG_TARGET_NB_REGS 32

#define MAX_CODE_GEN_BUFFER_SIZE  ((size_t)-1)

typedef enum {
    TCG_REG_ZERO,
    TCG_REG_RA,
    TCG_REG_TP,
    TCG_REG_SP,
    TCG_REG_A0,
    TCG_REG_A1,
    TCG_REG_A2,
    TCG_REG_A3,
    TCG_REG_A4,
    TCG_REG_A5,
    TCG_REG_A6,
    TCG_REG_A7,
    TCG_REG_T0,
    TCG_REG_T1,
    TCG_REG_T2,
    TCG_REG_T3,
    TCG_REG_T4,
    TCG_REG_T5,
    TCG_REG_T6,
    TCG_REG_T7,
    TCG_REG_T8,
    TCG_REG_RESERVED,
    TCG_REG_S9,
    TCG_REG_S0,
    TCG_REG_S1,
    TCG_REG_S2,
    TCG_REG_S3,
    TCG_REG_S4,
    TCG_REG_S5,
    TCG_REG_S6,
    TCG_REG_S7,
    TCG_REG_S8,

    /* aliases */
    TCG_AREG0    = TCG_REG_S0,
    TCG_REG_TMP0 = TCG_REG_T8,
    TCG_REG_TMP1 = TCG_REG_T7,
    TCG_REG_TMP2 = TCG_REG_T6,
} TCGReg;

/* used for function call generation */
#define TCG_REG_CALL_STACK              TCG_REG_SP
#define TCG_TARGET_STACK_ALIGN          16
#define TCG_TARGET_CALL_STACK_OFFSET    0
#define TCG_TARGET_CALL_ARG_I32         TCG_CALL_ARG_NORMAL
#define TCG_TARGET_CALL_ARG_I64         TCG_CALL_ARG_NORMAL
#define TCG_TARGET_CALL_ARG_I128        TCG_CALL_ARG_NORMAL
#define TCG_TARGET_CALL_RET_I128        TCG_CALL_RET_NORMAL

/* optional instructions */
#define TCG_TARGET_HAS_movcond_i32      1
#define TCG_TARGET_HAS_div_i32          1
#define TCG_TARGET_HAS_rem_i32          1
#define TCG_TARGET_HAS_div2_i32         0
#define TCG_TARGET_HAS_rot_i32          1
#define TCG_TARGET_HAS_deposit_i32      1
#define TCG_TARGET_HAS_extract_i32      1
#define TCG_TARGET_HAS_sextract_i32     0
#define TCG_TARGET_HAS_extract2_i32     0
#define TCG_TARGET_HAS_add2_i32         0
#define TCG_TARGET_HAS_sub2_i32         0
#define TCG_TARGET_HAS_mulu2_i32        0
#define TCG_TARGET_HAS_muls2_i32        0
#define TCG_TARGET_HAS_muluh_i32        1
#define TCG_TARGET_HAS_mulsh_i32        1
#define TCG_TARGET_HAS_ext8s_i32        1
#define TCG_TARGET_HAS_ext16s_i32       1
#define TCG_TARGET_HAS_ext8u_i32        1
#define TCG_TARGET_HAS_ext16u_i32       1
#define TCG_TARGET_HAS_bswap16_i32      1
#define TCG_TARGET_HAS_bswap32_i32      1
#define TCG_TARGET_HAS_not_i32          1
#define TCG_TARGET_HAS_neg_i32          0
#define TCG_TARGET_HAS_andc_i32         1
#define TCG_TARGET_HAS_orc_i32          1
#define TCG_TARGET_HAS_eqv_i32          0
#define TCG_TARGET_HAS_nand_i32         0
#define TCG_TARGET_HAS_nor_i32          1
#define TCG_TARGET_HAS_clz_i32          1
#define TCG_TARGET_HAS_ctz_i32          1
#define TCG_TARGET_HAS_ctpop_i32        0
#define TCG_TARGET_HAS_brcond2          0
#define TCG_TARGET_HAS_setcond2         0
#define TCG_TARGET_HAS_qemu_st8_i32     0

/* 64-bit operations */
#define TCG_TARGET_HAS_movcond_i64      1
#define TCG_TARGET_HAS_div_i64          1
#define TCG_TARGET_HAS_rem_i64          1
#define TCG_TARGET_HAS_div2_i64         0
#define TCG_TARGET_HAS_rot_i64          1
#define TCG_TARGET_HAS_deposit_i64      1
#define TCG_TARGET_HAS_extract_i64      1
#define TCG_TARGET_HAS_sextract_i64     0
#define TCG_TARGET_HAS_extract2_i64     0
#define TCG_TARGET_HAS_extrl_i64_i32    1
#define TCG_TARGET_HAS_extrh_i64_i32    1
#define TCG_TARGET_HAS_ext8s_i64        1
#define TCG_TARGET_HAS_ext16s_i64       1
#define TCG_TARGET_HAS_ext32s_i64       1
#define TCG_TARGET_HAS_ext8u_i64        1
#define TCG_TARGET_HAS_ext16u_i64       1
#define TCG_TARGET_HAS_ext32u_i64       1
#define TCG_TARGET_HAS_bswap16_i64      1
#define TCG_TARGET_HAS_bswap32_i64      1
#define TCG_TARGET_HAS_bswap64_i64      1
#define TCG_TARGET_HAS_not_i64          1
#define TCG_TARGET_HAS_neg_i64          0
#define TCG_TARGET_HAS_andc_i64         1
#define TCG_TARGET_HAS_orc_i64          1
#define TCG_TARGET_HAS_eqv_i64          0
#define TCG_TARGET_HAS_nand_i64         0
#define TCG_TARGET_HAS_nor_i64          1
#define TCG_TARGET_HAS_clz_i64          1
#define TCG_TARGET_HAS_ctz_i64          1
#define TCG_TARGET_HAS_ctpop_i64        0
#define TCG_TARGET_HAS_add2_i64         0
#define TCG_TARGET_HAS_sub2_i64         0
#define TCG_TARGET_HAS_mulu2_i64        0
#define TCG_TARGET_HAS_muls2_i64        0
#define TCG_TARGET_HAS_muluh_i64        1
#define TCG_TARGET_HAS_mulsh_i64        1
#define TCG_TARGET_HAS_qemu_ldst_i128   0

#define TCG_TARGET_DEFAULT_MO (0)

#define TCG_TARGET_NEED_LDST_LABELS

#endif /* LOONGARCH_TCG_TARGET_H */