Commit 3ca879ae authored by Richard Henderson's avatar Richard Henderson Committed by Peter Maydell
Browse files

target/arm: Implement SVE compress active elements 



Reviewed-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-id: 20180613015641.5667-6-richard.henderson@linaro.org
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 234b48e9

target/arm/helper-sve.h

+3 −0
Original line number Diff line number Diff line
@@ -460,6 +460,9 @@ DEF_HELPER_FLAGS_4(sve_trn_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32) 
DEF_HELPER_FLAGS_4(sve_trn_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)

DEF_HELPER_FLAGS_4(sve_trn_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)



DEF_HELPER_FLAGS_4(sve_compact_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)

DEF_HELPER_FLAGS_4(sve_compact_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)



DEF_HELPER_FLAGS_5(sve_and_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)

DEF_HELPER_FLAGS_5(sve_bic_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)

DEF_HELPER_FLAGS_5(sve_eor_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)

target/arm/sve.decode

+6 −0
Original line number Diff line number Diff line
@@ -424,6 +424,12 @@ UZP2_z 00000101 .. 1 ..... 011 011 ..... ..... @rd_rn_rm 
TRN1_z          00000101 .. 1 ..... 011 100 ..... .....         @rd_rn_rm

TRN2_z          00000101 .. 1 ..... 011 101 ..... .....         @rd_rn_rm



### SVE Permute - Predicated Group



# SVE compress active elements

# Note esz >= 2

COMPACT         00000101 .. 100001 100 ... ..... .....          @rd_pg_rn



### SVE Predicate Logical Operations Group



# SVE predicate logical operations

target/arm/sve_helper.c

+34 −0
Original line number Diff line number Diff line
@@ -2036,3 +2036,37 @@ DO_TRN(sve_trn_d, uint64_t, ) 
#undef DO_ZIP

#undef DO_UZP

#undef DO_TRN



void HELPER(sve_compact_s)(void *vd, void *vn, void *vg, uint32_t desc)

{

    intptr_t i, j, opr_sz = simd_oprsz(desc) / 4;

    uint32_t *d = vd, *n = vn;

    uint8_t *pg = vg;



    for (i = j = 0; i < opr_sz; i++) {

        if (pg[H1(i / 2)] & (i & 1 ? 0x10 : 0x01)) {

            d[H4(j)] = n[H4(i)];

            j++;

        }

    }

    for (; j < opr_sz; j++) {

        d[H4(j)] = 0;

    }

}



void HELPER(sve_compact_d)(void *vd, void *vn, void *vg, uint32_t desc)

{

    intptr_t i, j, opr_sz = simd_oprsz(desc) / 8;

    uint64_t *d = vd, *n = vn;

    uint8_t *pg = vg;



    for (i = j = 0; i < opr_sz; i++) {

        if (pg[H1(i)] & 1) {

            d[j] = n[i];

            j++;

        }

    }

    for (; j < opr_sz; j++) {

        d[j] = 0;

    }

}

target/arm/translate-sve.c

+12 −0
Original line number Diff line number Diff line
@@ -2284,6 +2284,18 @@ static bool trans_TRN2_z(DisasContext *s, arg_rrr_esz *a, uint32_t insn) 
    return do_zzz_data_ool(s, a, 1 << a->esz, trn_fns[a->esz]);

}



/*

 *** SVE Permute Vector - Predicated Group

 */



static bool trans_COMPACT(DisasContext *s, arg_rpr_esz *a, uint32_t insn)

{

    static gen_helper_gvec_3 * const fns[4] = {

        NULL, NULL, gen_helper_sve_compact_s, gen_helper_sve_compact_d

    };

    return do_zpz_ool(s, a, fns[a->esz]);

}



/*

 *** SVE Memory - 32-bit Gather and Unsized Contiguous Group

 */