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target/alpha: Use tcg_gen_lookup_and_goto_ptr

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Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-05-26 13:31:49 -07:00
parent b97a879de9
commit 54e1d4ed1d
1 changed files with 22 additions and 5 deletions
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27
target/alpha/translate.c
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@ -84,6 +84,7 @@ typedef enum {
the PC (for whatever reason), so there's no need to do it again on
exiting the TB. */
EXIT_PC_UPDATED,
EXIT_PC_UPDATED_NOCHAIN,
/* We are exiting the TB, but have neither emitted a goto_tb, nor
updated the PC for the next instruction to be executed. */
@ -458,11 +459,17 @@ static bool in_superpage(DisasContext *ctx, int64_t addr)
#endif
}
static bool use_exit_tb(DisasContext *ctx)
{
return ((ctx->tb->cflags & CF_LAST_IO)
|| ctx->singlestep_enabled
|| singlestep);
}
static bool use_goto_tb(DisasContext *ctx, uint64_t dest)
{
/* Suppress goto_tb in the case of single-steping and IO. */
if ((ctx->tb->cflags & CF_LAST_IO)
|| ctx->singlestep_enabled || singlestep) {
if (unlikely(use_exit_tb(ctx))) {
return false;
}
#ifndef CONFIG_USER_ONLY
@ -1198,7 +1205,10 @@ static ExitStatus gen_call_pal(DisasContext *ctx, int palcode)
tcg_gen_andi_i64(tmp, ctx->ir[IR_A0], PS_INT_MASK);
tcg_gen_st8_i64(tmp, cpu_env, offsetof(CPUAlphaState, ps));
tcg_temp_free(tmp);
break;
/* Allow interrupts to be recognized right away. */
tcg_gen_movi_i64(cpu_pc, ctx->pc);
return EXIT_PC_UPDATED_NOCHAIN;
case 0x36:
/* RDPS */
@ -1266,7 +1276,7 @@ static ExitStatus gen_call_pal(DisasContext *ctx, int palcode)
need the page permissions check. We'll see the existence of
the page when we create the TB, and we'll flush all TBs if
we change the PAL base register. */
if (!ctx->singlestep_enabled && !(ctx->tb->cflags & CF_LAST_IO)) {
if (!use_exit_tb(ctx)) {
tcg_gen_goto_tb(0);
tcg_gen_movi_i64(cpu_pc, entry);
tcg_gen_exit_tb((uintptr_t)ctx->tb);
@ -2686,7 +2696,8 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
tcg_gen_andi_i64(tmp, vb, 1);
tcg_gen_st8_i64(tmp, cpu_env, offsetof(CPUAlphaState, pal_mode));
tcg_gen_andi_i64(cpu_pc, vb, ~3);
ret = EXIT_PC_UPDATED;
/* Allow interrupts to be recognized right away. */
ret = EXIT_PC_UPDATED_NOCHAIN;
break;
#else
goto invalid_opc;
@ -3010,6 +3021,12 @@ void gen_intermediate_code(CPUAlphaState *env, struct TranslationBlock *tb)
tcg_gen_movi_i64(cpu_pc, ctx.pc);
/* FALLTHRU */
case EXIT_PC_UPDATED:
if (!use_exit_tb(&ctx)) {
tcg_gen_lookup_and_goto_ptr(cpu_pc);
break;
}
/* FALLTHRU */
case EXIT_PC_UPDATED_NOCHAIN:
if (ctx.singlestep_enabled) {
gen_excp_1(EXCP_DEBUG, 0);
} else {