Commit 2a080ce2 authored by Chen Gang's avatar Chen Gang Committed by Richard Henderson
Browse files

target-tilegx: Implement prefetch instructions in pipe y2 



Originally, tilegx qemu only implement prefetch instructions in pipe x1,
did not implement them in pipe y2.

Signed-off-by: default avatarChen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent b803894e

target-tilegx/translate.c

+14 −8
Original line number Diff line number Diff line
@@ -2105,38 +2105,44 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle) 
    unsigned srcbdest = get_SrcBDest_Y2(bundle);

    const char *mnemonic;

    TCGMemOp memop;

    bool prefetch_nofault = false;



    switch (OEY2(opc, mode)) {

    case OEY2(LD1S_OPCODE_Y2, MODE_OPCODE_YA2):

        memop = MO_SB;

        mnemonic = "ld1s";

        mnemonic = "ld1s"; /* prefetch_l1_fault */

        goto do_load;

    case OEY2(LD1U_OPCODE_Y2, MODE_OPCODE_YA2):

        memop = MO_UB;

        mnemonic = "ld1u";

        mnemonic = "ld1u"; /* prefetch, prefetch_l1 */

        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);

        goto do_load;

    case OEY2(LD2S_OPCODE_Y2, MODE_OPCODE_YA2):

        memop = MO_TESW;

        mnemonic = "ld2s";

        mnemonic = "ld2s"; /* prefetch_l2_fault */

        goto do_load;

    case OEY2(LD2U_OPCODE_Y2, MODE_OPCODE_YA2):

        memop = MO_TEUW;

        mnemonic = "ld2u";

        mnemonic = "ld2u"; /* prefetch_l2 */

        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);

        goto do_load;

    case OEY2(LD4S_OPCODE_Y2, MODE_OPCODE_YB2):

        memop = MO_TESL;

        mnemonic = "ld4s";

        mnemonic = "ld4s"; /* prefetch_l3_fault */

        goto do_load;

    case OEY2(LD4U_OPCODE_Y2, MODE_OPCODE_YB2):

        memop = MO_TEUL;

        mnemonic = "ld4u";

        mnemonic = "ld4u"; /* prefetch_l3 */

        prefetch_nofault = (srcbdest == TILEGX_R_ZERO);

        goto do_load;

    case OEY2(LD_OPCODE_Y2, MODE_OPCODE_YB2):

        memop = MO_TEQ;

        mnemonic = "ld";

    do_load:

        if (!prefetch_nofault) {

            tcg_gen_qemu_ld_tl(dest_gr(dc, srcbdest), load_gr(dc, srca),

                               dc->mmuidx, memop);

        }

        qemu_log_mask(CPU_LOG_TB_IN_ASM, "%s %s, %s", mnemonic,

                      reg_names[srcbdest], reg_names[srca]);

        return TILEGX_EXCP_NONE;