Commit c2c08713 authored by Alex Bennée's avatar Alex Bennée Committed by Peter Maydell
Browse files

arm/translate-a64: add all single op FP16 to handle_fp_1src_half 



This includes FMOV, FABS, FNEG, FSQRT and  FRINT[NPMZAXI]. We re-use
existing helpers to achieve this.

Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-32-alex.bennee@linaro.org
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 7c93b774

target/arm/translate-a64.c

+71 −0
Original line number Diff line number Diff line
@@ -4596,6 +4596,65 @@ static void disas_fp_csel(DisasContext *s, uint32_t insn) 
    tcg_temp_free_i64(t_true);

}



/* Floating-point data-processing (1 source) - half precision */

static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)

{

    TCGv_ptr fpst = NULL;

    TCGv_i32 tcg_op = tcg_temp_new_i32();

    TCGv_i32 tcg_res = tcg_temp_new_i32();



    read_vec_element_i32(s, tcg_op, rn, 0, MO_16);



    switch (opcode) {

    case 0x0: /* FMOV */

        tcg_gen_mov_i32(tcg_res, tcg_op);

        break;

    case 0x1: /* FABS */

        tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);

        break;

    case 0x2: /* FNEG */

        tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);

        break;

    case 0x3: /* FSQRT */

        gen_helper_sqrt_f16(tcg_res, tcg_op, cpu_env);

        break;

    case 0x8: /* FRINTN */

    case 0x9: /* FRINTP */

    case 0xa: /* FRINTM */

    case 0xb: /* FRINTZ */

    case 0xc: /* FRINTA */

    {

        TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7));

        fpst = get_fpstatus_ptr(true);



        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);

        gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);



        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);

        tcg_temp_free_i32(tcg_rmode);

        break;

    }

    case 0xe: /* FRINTX */

        fpst = get_fpstatus_ptr(true);

        gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst);

        break;

    case 0xf: /* FRINTI */

        fpst = get_fpstatus_ptr(true);

        gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);

        break;

    default:

        abort();

    }



    write_fp_sreg(s, rd, tcg_res);



    if (fpst) {

        tcg_temp_free_ptr(fpst);

    }

    tcg_temp_free_i32(tcg_op);

    tcg_temp_free_i32(tcg_res);

}



/* Floating-point data-processing (1 source) - single precision */

static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)

{
@@ -4825,6 +4884,18 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn) 


            handle_fp_1src_double(s, opcode, rd, rn);

            break;

        case 3:

            if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {

                unallocated_encoding(s);

                return;

            }



            if (!fp_access_check(s)) {

                return;

            }



            handle_fp_1src_half(s, opcode, rd, rn);

            break;

        default:

            unallocated_encoding(s);

        }