openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

target/alpha: Use goto_tb for fallthru between TBs 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-05-24 19:17:51 -07:00
parent bec5e2b975
commit 2d826cdc8a
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
target/alpha/translate.c
View File

@ -89,6 +89,9 @@ typedef enum {
updated the PC for the next instruction to be executed. */ updated the PC for the next instruction to be executed. */
EXIT_PC_STALE, EXIT_PC_STALE,
/* We are exiting the TB due to page crossing or space constraints. */
EXIT_FALLTHRU,
/* We are ending the TB with a noreturn function call, e.g. longjmp. /* We are ending the TB with a noreturn function call, e.g. longjmp.
No following code will be executed. */ No following code will be executed. */
EXIT_NORETURN, EXIT_NORETURN,
@ -2984,7 +2987,7 @@ void gen_intermediate_code(CPUAlphaState *env, struct TranslationBlock *tb)
|| num_insns >= max_insns || num_insns >= max_insns
|| singlestep || singlestep
|| ctx.singlestep_enabled)) { || ctx.singlestep_enabled)) {
ret = EXIT_PC_STALE; ret = EXIT_FALLTHRU;
} }
} while (ret == NO_EXIT); } while (ret == NO_EXIT);
@ -2996,6 +2999,13 @@ void gen_intermediate_code(CPUAlphaState *env, struct TranslationBlock *tb)
case EXIT_GOTO_TB: case EXIT_GOTO_TB:
case EXIT_NORETURN: case EXIT_NORETURN:
break; break;
case EXIT_FALLTHRU:
if (use_goto_tb(&ctx, ctx.pc)) {
tcg_gen_goto_tb(0);
tcg_gen_movi_i64(cpu_pc, ctx.pc);
tcg_gen_exit_tb((uintptr_t)ctx.tb);
}
/* FALLTHRU */
case EXIT_PC_STALE: case EXIT_PC_STALE:
tcg_gen_movi_i64(cpu_pc, ctx.pc); tcg_gen_movi_i64(cpu_pc, ctx.pc);
/* FALLTHRU */ /* FALLTHRU */
@ -3007,7 +3017,7 @@ void gen_intermediate_code(CPUAlphaState *env, struct TranslationBlock *tb)
} }
break; break;
default: default:
abort(); g_assert_not_reached();
} }
gen_tb_end(tb, num_insns); gen_tb_end(tb, num_insns);