Commit e04e98bf authored by Richard Henderson's avatar Richard Henderson
Browse files

target-tilegx: Handle conditional branch instructions 



Reviewed-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent c230a994

target-tilegx/translate.c

+38 −13
Original line number Diff line number Diff line
@@ -1089,30 +1089,55 @@ static TileExcp gen_branch_opcode_x1(DisasContext *dc, unsigned ext, 
    target_ulong tgt = dc->pc + off * TILEGX_BUNDLE_SIZE_IN_BYTES;

    const char *mnemonic;



    switch (ext) {

    case BEQZT_BRANCH_OPCODE_X1:

    dc->jmp.dest = tcg_const_tl(tgt);

    dc->jmp.val1 = tcg_temp_new();

    tcg_gen_mov_tl(dc->jmp.val1, load_gr(dc, srca));



    /* Note that the "predict taken" opcodes have bit 0 clear.

       Therefore, fold the two cases together by setting bit 0.  */

    switch (ext | 1) {

    case BEQZ_BRANCH_OPCODE_X1:

    case BNEZT_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_EQ;

        mnemonic = "beqz";

        break;

    case BNEZ_BRANCH_OPCODE_X1:

    case BLBC_BRANCH_OPCODE_X1:

    case BGEZT_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_NE;

        mnemonic = "bnez";

        break;

    case BGEZ_BRANCH_OPCODE_X1:

    case BGTZT_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_GE;

        mnemonic = "bgez";

        break;

    case BGTZ_BRANCH_OPCODE_X1:

    case BLBCT_BRANCH_OPCODE_X1:

    case BLBST_BRANCH_OPCODE_X1:

    case BLBS_BRANCH_OPCODE_X1:

    case BLEZT_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_GT;

        mnemonic = "bgtz";

        break;

    case BLEZ_BRANCH_OPCODE_X1:

    case BLTZT_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_LE;

        mnemonic = "blez";

        break;

    case BLTZ_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_LT;

        mnemonic = "bltz";

        break;

    case BLBC_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_EQ;

        tcg_gen_andi_tl(dc->jmp.val1, dc->jmp.val1, 1);

        mnemonic = "blbc";

        break;

    case BLBS_BRANCH_OPCODE_X1:

        dc->jmp.cond = TCG_COND_NE;

        tcg_gen_andi_tl(dc->jmp.val1, dc->jmp.val1, 1);

        mnemonic = "blbs";

        break;

    default:

        return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;

    }



    if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {

        qemu_log("%s %s, " TARGET_FMT_lx " <%s>",

                 mnemonic, reg_names[srca], tgt, lookup_symbol(tgt));

        qemu_log("%s%s %s, " TARGET_FMT_lx " <%s>",

                 mnemonic, ext & 1 ? "" : "t",

                 reg_names[srca], tgt, lookup_symbol(tgt));

    }

    return TILEGX_EXCP_NONE;

}