diff options
| author | Richard Henderson | 2021-05-17 22:50:05 +0200 |
|---|---|---|
| committer | David Gibson | 2021-05-19 02:30:29 +0200 |
| commit | 6086c751c3ef2d05df25f4c494e097d169c68731 (patch) | |
| tree | 37d8e4ab8ac4b81e5a05fcdcec72d4fbb5fc76fb /target/ppc | |
| parent | target/ppc: Replace POWERPC_EXCP_STOP with DISAS_EXIT_UPDATE (diff) | |
| download | qemu-6086c751c3ef2d05df25f4c494e097d169c68731.tar.gz qemu-6086c751c3ef2d05df25f4c494e097d169c68731.tar.xz qemu-6086c751c3ef2d05df25f4c494e097d169c68731.zip | |
target/ppc: Replace POWERPC_EXCP_BRANCH with DISAS_NORETURN
The translation of branch instructions always results in exit from
the TB. Remove the synthetic "exception" after no more uses.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20210517205025.3777947-4-matheus.ferst@eldorado.org.br>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/cpu.h | 2 | ||||
| -rw-r--r-- | target/ppc/translate.c | 8 |
2 files changed, 2 insertions, 8 deletions
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 9e38df685d..cab33a3680 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -131,8 +131,6 @@ enum { POWERPC_EXCP_SYSCALL_VECTORED = 102, /* scv exception */ /* EOL */ POWERPC_EXCP_NB = 103, - /* QEMU exceptions: used internally during code translation */ - POWERPC_EXCP_BRANCH = 0x201, /* branch instruction */ /* QEMU exceptions: special cases we want to stop translation */ POWERPC_EXCP_SYSCALL_USER = 0x203, /* System call in user mode only */ }; diff --git a/target/ppc/translate.c b/target/ppc/translate.c index f57b67be5f..d019454550 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -4692,7 +4692,6 @@ static void gen_b(DisasContext *ctx) { target_ulong li, target; - ctx->exception = POWERPC_EXCP_BRANCH; /* sign extend LI */ li = LI(ctx->opcode); li = (li ^ 0x02000000) - 0x02000000; @@ -4706,6 +4705,7 @@ static void gen_b(DisasContext *ctx) } gen_update_cfar(ctx, ctx->cia); gen_goto_tb(ctx, 0, target); + ctx->base.is_jmp = DISAS_NORETURN; } #define BCOND_IM 0 @@ -4718,7 +4718,6 @@ static void gen_bcond(DisasContext *ctx, int type) uint32_t bo = BO(ctx->opcode); TCGLabel *l1; TCGv target; - ctx->exception = POWERPC_EXCP_BRANCH; if (type == BCOND_LR || type == BCOND_CTR || type == BCOND_TAR) { target = tcg_temp_local_new(); @@ -4825,6 +4824,7 @@ static void gen_bcond(DisasContext *ctx, int type) gen_set_label(l1); gen_goto_tb(ctx, 1, ctx->base.pc_next); } + ctx->base.is_jmp = DISAS_NORETURN; } static void gen_bc(DisasContext *ctx) @@ -9102,7 +9102,6 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs) /* Check trace mode exceptions */ if (unlikely(ctx->singlestep_enabled & CPU_SINGLE_STEP && (ctx->base.pc_next <= 0x100 || ctx->base.pc_next > 0xF00) && - ctx->exception != POWERPC_EXCP_BRANCH && ctx->base.is_jmp != DISAS_NORETURN)) { uint32_t excp = gen_prep_dbgex(ctx); gen_exception_nip(ctx, excp, ctx->base.pc_next); @@ -9118,9 +9117,6 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs) switch (ctx->exception) { case POWERPC_EXCP_NONE: break; - case POWERPC_EXCP_BRANCH: - ctx->base.is_jmp = DISAS_NORETURN; - break; default: /* Every other ctx->exception should have set NORETURN. */ g_assert_not_reached(); |