Commit 560f92cc authored by Fabrice Bellard's avatar Fabrice Bellard
Browse files

jump simplification 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4583 c046a42c-6fe2-441c-8c8c-71466251a162
parent affa3264

tcg/x86_64/tcg-target.c

+1 −22
Original line number Diff line number Diff line
@@ -450,41 +450,20 @@ static void tcg_out_brcond(TCGContext *s, int cond, 
                           TCGArg arg1, TCGArg arg2, int const_arg2,

                           int label_index, int rexw)

{

    int c;

    if (const_arg2) {

        if (arg2 == 0) {

            /* use test */

            switch(cond) {

            case TCG_COND_EQ:

                c = JCC_JE;

                break;

            case TCG_COND_NE:

                c = JCC_JNE;

                break;

            case TCG_COND_LT:

                c = JCC_JS;

                break;

            case TCG_COND_GE:

                c = JCC_JNS;

                break;

            default:

                goto do_cmpi;

            }

            /* test r, r */

            tcg_out_modrm(s, 0x85 | rexw, arg1, arg1);

            tcg_out_jxx(s, c, label_index);

        } else {

        do_cmpi:

            if (rexw)

                tgen_arithi64(s, ARITH_CMP, arg1, arg2);

            else

                tgen_arithi32(s, ARITH_CMP, arg1, arg2);

            tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);

        }

    } else {

        tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3) | rexw, arg2, arg1);

        tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);

    }

    tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);

}



#if defined(CONFIG_SOFTMMU)