/*
 *  AArch64 translation, common definitions.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TARGET_ARM_TRANSLATE_A64_H
#define TARGET_ARM_TRANSLATE_A64_H

TCGv_i64 cpu_reg(DisasContext *s, int reg);
TCGv_i64 cpu_reg_sp(DisasContext *s, int reg);
TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf);
TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf);
void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v);
bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn,
                            unsigned int imms, unsigned int immr);
bool sve_access_check(DisasContext *s);
bool sme_enabled_check(DisasContext *s);
bool sme_enabled_check_with_svcr(DisasContext *s, unsigned);

/* This function corresponds to CheckStreamingSVEEnabled. */
static inline bool sme_sm_enabled_check(DisasContext *s)
{
    return sme_enabled_check_with_svcr(s, R_SVCR_SM_MASK);
}

/* This function corresponds to CheckSMEAndZAEnabled. */
static inline bool sme_za_enabled_check(DisasContext *s)
{
    return sme_enabled_check_with_svcr(s, R_SVCR_ZA_MASK);
}

/* Note that this function corresponds to CheckStreamingSVEAndZAEnabled. */
static inline bool sme_smza_enabled_check(DisasContext *s)
{
    return sme_enabled_check_with_svcr(s, R_SVCR_SM_MASK | R_SVCR_ZA_MASK);
}

TCGv_i64 clean_data_tbi(DisasContext *s, TCGv_i64 addr);
TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
                        bool tag_checked, int log2_size);
TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
                        bool tag_checked, int size);

/* We should have at some point before trying to access an FP register
 * done the necessary access check, so assert that
 * (a) we did the check and
 * (b) we didn't then just plough ahead anyway if it failed.
 * Print the instruction pattern in the abort message so we can figure
 * out what we need to fix if a user encounters this problem in the wild.
 */
static inline void assert_fp_access_checked(DisasContext *s)
{
#ifdef CONFIG_DEBUG_TCG
    if (unlikely(!s->fp_access_checked || s->fp_excp_el)) {
        fprintf(stderr, "target-arm: FP access check missing for "
                "instruction 0x%08x\n", s->insn);
        abort();
    }
#endif
}

/* Return the offset into CPUARMState of an element of specified
 * size, 'element' places in from the least significant end of
 * the FP/vector register Qn.
 */
static inline int vec_reg_offset(DisasContext *s, int regno,
                                 int element, MemOp size)
{
    int element_size = 1 << size;
    int offs = element * element_size;
#if HOST_BIG_ENDIAN
    /* This is complicated slightly because vfp.zregs[n].d[0] is
     * still the lowest and vfp.zregs[n].d[15] the highest of the
     * 256 byte vector, even on big endian systems.
     *
     * Calculate the offset assuming fully little-endian,
     * then XOR to account for the order of the 8-byte units.
     *
     * For 16 byte elements, the two 8 byte halves will not form a
     * host int128 if the host is bigendian, since they're in the
     * wrong order.  However the only 16 byte operation we have is
     * a move, so we can ignore this for the moment.  More complicated
     * operations will have to special case loading and storing from
     * the zregs array.
     */
    if (element_size < 8) {
        offs ^= 8 - element_size;
    }
#endif
    offs += offsetof(CPUARMState, vfp.zregs[regno]);
    assert_fp_access_checked(s);
    return offs;
}

/* Return the offset info CPUARMState of the "whole" vector register Qn.  */
static inline int vec_full_reg_offset(DisasContext *s, int regno)
{
    assert_fp_access_checked(s);
    return offsetof(CPUARMState, vfp.zregs[regno]);
}

/* Return a newly allocated pointer to the vector register.  */
static inline TCGv_ptr vec_full_reg_ptr(DisasContext *s, int regno)
{
    TCGv_ptr ret = tcg_temp_new_ptr();
    tcg_gen_addi_ptr(ret, cpu_env, vec_full_reg_offset(s, regno));
    return ret;
}

/* Return the byte size of the "whole" vector register, VL / 8.  */
static inline int vec_full_reg_size(DisasContext *s)
{
    return s->vl;
}

/* Return the byte size of the vector register, SVL / 8. */
static inline int streaming_vec_reg_size(DisasContext *s)
{
    return s->svl;
}

/*
 * Return the offset info CPUARMState of the predicate vector register Pn.
 * Note for this purpose, FFR is P16.
 */
static inline int pred_full_reg_offset(DisasContext *s, int regno)
{
    return offsetof(CPUARMState, vfp.pregs[regno]);
}

/* Return the byte size of the whole predicate register, VL / 64.  */
static inline int pred_full_reg_size(DisasContext *s)
{
    return s->vl >> 3;
}

/* Return the byte size of the predicate register, SVL / 64.  */
static inline int streaming_pred_reg_size(DisasContext *s)
{
    return s->svl >> 3;
}

/*
 * Round up the size of a register to a size allowed by
 * the tcg vector infrastructure.  Any operation which uses this
 * size may assume that the bits above pred_full_reg_size are zero,
 * and must leave them the same way.
 *
 * Note that this is not needed for the vector registers as they
 * are always properly sized for tcg vectors.
 */
static inline int size_for_gvec(int size)
{
    if (size <= 8) {
        return 8;
    } else {
        return QEMU_ALIGN_UP(size, 16);
    }
}

static inline int pred_gvec_reg_size(DisasContext *s)
{
    return size_for_gvec(pred_full_reg_size(s));
}

/* Return a newly allocated pointer to the predicate register.  */
static inline TCGv_ptr pred_full_reg_ptr(DisasContext *s, int regno)
{
    TCGv_ptr ret = tcg_temp_new_ptr();
    tcg_gen_addi_ptr(ret, cpu_env, pred_full_reg_offset(s, regno));
    return ret;
}

bool disas_sve(DisasContext *, uint32_t);
bool disas_sme(DisasContext *, uint32_t);

void gen_gvec_rax1(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                   uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
void gen_gvec_xar(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                  uint32_t rm_ofs, int64_t shift,
                  uint32_t opr_sz, uint32_t max_sz);

void gen_sve_ldr(DisasContext *s, TCGv_ptr, int vofs, int len, int rn, int imm);
void gen_sve_str(DisasContext *s, TCGv_ptr, int vofs, int len, int rn, int imm);

#endif /* TARGET_ARM_TRANSLATE_A64_H */