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target/m68k: Use lookup_and_goto_tb for DISAS_JUMP

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These are all indirect or out-of-page direct jumps.
We can indirectly chain to the next TB without going
back to the main loop.

Backports commit 8aaf7da9c3b1f282b5a123de3e87a2e6ca87f3b9 from qemu
This commit is contained in:
Richard Henderson 2018-06-15 10:48:16 -04:00 committed by Lioncash
parent c2fe05f7d9
commit 90b3770665
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 17 additions and 14 deletions
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5
qemu/target/m68k/translate.c
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@ -6409,8 +6409,11 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb)
update_cc_op(dc);
gen_jmp_tb(dc, 0, dc->pc);
break;
default:
case DISAS_JUMP:
/* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */
tcg_gen_lookup_and_goto_ptr(tcg_ctx);
break;
default:
case DISAS_UPDATE:
update_cc_op(dc);
/* indicate that the hash table must be used to find the next TB */