qemu/target/arm/translate-neon.inc.c

/*
 *  ARM translation: AArch32 Neon instructions
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *  Copyright (c) 2005-2007 CodeSourcery
 *  Copyright (c) 2007 OpenedHand, Ltd.
 *  Copyright (c) 2020 Linaro, Ltd.
 *
 * 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 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/>.
 */

/*
 * This file is intended to be included from translate.c; it uses
 * some macros and definitions provided by that file.
 * It might be possible to convert it to a standalone .c file eventually.
 */

/* Include the generated Neon decoder */
#include "decode-neon-dp.inc.c"
#include "decode-neon-ls.inc.c"
#include "decode-neon-shared.inc.c"

static bool trans_VCMLA(DisasContext *s, arg_VCMLA *a)
{
    int opr_sz;
    TCGv_ptr fpst;
    gen_helper_gvec_3_ptr *fn_gvec_ptr;

    if (!dc_isar_feature(aa32_vcma, s)
        || (!a->size && !dc_isar_feature(aa32_fp16_arith, s))) {
        return false;
    }

    /* UNDEF accesses to D16-D31 if they don't exist. */
    if (!dc_isar_feature(aa32_simd_r32, s) &&
        ((a->vd | a->vn | a->vm) & 0x10)) {
        return false;
    }

    if ((a->vn | a->vm | a->vd) & a->q) {
        return false;
    }

    if (!vfp_access_check(s)) {
        return true;
    }

    opr_sz = (1 + a->q) * 8;
    fpst = get_fpstatus_ptr(1);
    fn_gvec_ptr = a->size ? gen_helper_gvec_fcmlas : gen_helper_gvec_fcmlah;
    tcg_gen_gvec_3_ptr(vfp_reg_offset(1, a->vd),
                       vfp_reg_offset(1, a->vn),
                       vfp_reg_offset(1, a->vm),
                       fpst, opr_sz, opr_sz, a->rot,
                       fn_gvec_ptr);
    tcg_temp_free_ptr(fpst);
    return true;
}

static bool trans_VCADD(DisasContext *s, arg_VCADD *a)
{
    int opr_sz;
    TCGv_ptr fpst;
    gen_helper_gvec_3_ptr *fn_gvec_ptr;

    if (!dc_isar_feature(aa32_vcma, s)
        || (!a->size && !dc_isar_feature(aa32_fp16_arith, s))) {
        return false;
    }

    /* UNDEF accesses to D16-D31 if they don't exist. */
    if (!dc_isar_feature(aa32_simd_r32, s) &&
        ((a->vd | a->vn | a->vm) & 0x10)) {
        return false;
    }

    if ((a->vn | a->vm | a->vd) & a->q) {
        return false;
    }

    if (!vfp_access_check(s)) {
        return true;
    }

    opr_sz = (1 + a->q) * 8;
    fpst = get_fpstatus_ptr(1);
    fn_gvec_ptr = a->size ? gen_helper_gvec_fcadds : gen_helper_gvec_fcaddh;
    tcg_gen_gvec_3_ptr(vfp_reg_offset(1, a->vd),
                       vfp_reg_offset(1, a->vn),
                       vfp_reg_offset(1, a->vm),
                       fpst, opr_sz, opr_sz, a->rot,
                       fn_gvec_ptr);
    tcg_temp_free_ptr(fpst);
    return true;
}

static bool trans_VDOT(DisasContext *s, arg_VDOT *a)
{
    int opr_sz;
    gen_helper_gvec_3 *fn_gvec;

    if (!dc_isar_feature(aa32_dp, s)) {
        return false;
    }

    /* UNDEF accesses to D16-D31 if they don't exist. */
    if (!dc_isar_feature(aa32_simd_r32, s) &&
        ((a->vd | a->vn | a->vm) & 0x10)) {
        return false;
    }

    if ((a->vn | a->vm | a->vd) & a->q) {
        return false;
    }

    if (!vfp_access_check(s)) {
        return true;
    }

    opr_sz = (1 + a->q) * 8;
    fn_gvec = a->u ? gen_helper_gvec_udot_b : gen_helper_gvec_sdot_b;
    tcg_gen_gvec_3_ool(vfp_reg_offset(1, a->vd),
                       vfp_reg_offset(1, a->vn),
                       vfp_reg_offset(1, a->vm),
                       opr_sz, opr_sz, 0, fn_gvec);
    return true;
}

static bool trans_VFML(DisasContext *s, arg_VFML *a)
{
    int opr_sz;

    if (!dc_isar_feature(aa32_fhm, s)) {
        return false;
    }

    /* UNDEF accesses to D16-D31 if they don't exist. */
    if (!dc_isar_feature(aa32_simd_r32, s) &&
        (a->vd & 0x10)) {
        return false;
    }

    if (a->vd & a->q) {
        return false;
    }

    if (!vfp_access_check(s)) {
        return true;
    }

    opr_sz = (1 + a->q) * 8;
    tcg_gen_gvec_3_ptr(vfp_reg_offset(1, a->vd),
                       vfp_reg_offset(a->q, a->vn),
                       vfp_reg_offset(a->q, a->vm),
                       cpu_env, opr_sz, opr_sz, a->s, /* is_2 == 0 */
                       gen_helper_gvec_fmlal_a32);
    return true;
}

static bool trans_VCMLA_scalar(DisasContext *s, arg_VCMLA_scalar *a)
{
    gen_helper_gvec_3_ptr *fn_gvec_ptr;
    int opr_sz;
    TCGv_ptr fpst;

    if (!dc_isar_feature(aa32_vcma, s)) {
        return false;
    }
    if (a->size == 0 && !dc_isar_feature(aa32_fp16_arith, s)) {
        return false;
    }

    /* UNDEF accesses to D16-D31 if they don't exist. */
    if (!dc_isar_feature(aa32_simd_r32, s) &&
        ((a->vd | a->vn | a->vm) & 0x10)) {
        return false;
    }

    if ((a->vd | a->vn) & a->q) {
        return false;
    }

    if (!vfp_access_check(s)) {
        return true;
    }

    fn_gvec_ptr = (a->size ? gen_helper_gvec_fcmlas_idx
                   : gen_helper_gvec_fcmlah_idx);
    opr_sz = (1 + a->q) * 8;
    fpst = get_fpstatus_ptr(1);
    tcg_gen_gvec_3_ptr(vfp_reg_offset(1, a->vd),
                       vfp_reg_offset(1, a->vn),
                       vfp_reg_offset(1, a->vm),
                       fpst, opr_sz, opr_sz,
                       (a->index << 2) | a->rot, fn_gvec_ptr);
    tcg_temp_free_ptr(fpst);
    return true;
}