| Message ID | 20210512185441.3619828-8-matheus.ferst@eldorado.org.br (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Base for adding PowerPC 64-bit instructions | expand |
On Wed, May 12, 2021 at 03:54:17PM -0300, matheus.ferst@eldorado.org.br wrote: > From: Richard Henderson <richard.henderson@linaro.org> > > Rewrite ppc_tr_tb_stop to handle these new codes. > > Convert ctx->exception into these new codes at the end of > ppc_tr_translate_insn, prior to pushing the change back > throughout translate.c. > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Applied to ppc-for-6.1, thanks. > --- > target/ppc/translate.c | 75 ++++++++++++++++++++++++++++++++++++------ > 1 file changed, 65 insertions(+), 10 deletions(-) > > diff --git a/target/ppc/translate.c b/target/ppc/translate.c > index 7b23f85c11..4bebb00bb2 100644 > --- a/target/ppc/translate.c > +++ b/target/ppc/translate.c > @@ -182,6 +182,11 @@ struct DisasContext { > uint64_t insns_flags2; > }; > > +#define DISAS_EXIT DISAS_TARGET_0 /* exit to main loop, pc updated */ > +#define DISAS_EXIT_UPDATE DISAS_TARGET_1 /* exit to main loop, pc stale */ > +#define DISAS_CHAIN DISAS_TARGET_2 /* lookup next tb, pc updated */ > +#define DISAS_CHAIN_UPDATE DISAS_TARGET_3 /* lookup next tb, pc stale */ > + > /* Return true iff byteswap is needed in a scalar memop */ > static inline bool need_byteswap(const DisasContext *ctx) > { > @@ -9417,28 +9422,78 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs) > opc3(ctx->opcode), opc4(ctx->opcode), ctx->opcode); > } > > - if (ctx->base.is_jmp == DISAS_NEXT > - && ctx->exception != POWERPC_EXCP_NONE) { > - ctx->base.is_jmp = DISAS_TOO_MANY; > + if (ctx->base.is_jmp == DISAS_NEXT) { > + switch (ctx->exception) { > + case POWERPC_EXCP_NONE: > + break; > + case POWERPC_EXCP_BRANCH: > + ctx->base.is_jmp = DISAS_NORETURN; > + break; > + case POWERPC_EXCP_SYNC: > + case POWERPC_EXCP_STOP: > + ctx->base.is_jmp = DISAS_EXIT; > + break; > + default: > + /* Every other ctx->exception should have set NORETURN. */ > + g_assert_not_reached(); > + } > } > } > > static void ppc_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs) > { > DisasContext *ctx = container_of(dcbase, DisasContext, base); > + DisasJumpType is_jmp = ctx->base.is_jmp; > + target_ulong nip = ctx->base.pc_next; > > - if (ctx->base.is_jmp == DISAS_NORETURN) { > + if (is_jmp == DISAS_NORETURN) { > + /* We have already exited the TB. */ > return; > } > > - if (ctx->exception == POWERPC_EXCP_NONE) { > - gen_goto_tb(ctx, 0, ctx->base.pc_next); > - } else if (ctx->exception != POWERPC_EXCP_BRANCH) { > - if (unlikely(ctx->base.singlestep_enabled)) { > - gen_debug_exception(ctx); > + /* Honor single stepping. */ > + if (unlikely(ctx->base.singlestep_enabled)) { > + switch (is_jmp) { > + case DISAS_TOO_MANY: > + case DISAS_EXIT_UPDATE: > + case DISAS_CHAIN_UPDATE: > + gen_update_nip(ctx, nip); > + break; > + case DISAS_EXIT: > + case DISAS_CHAIN: > + break; > + default: > + g_assert_not_reached(); > } > - /* Generate the return instruction */ > + gen_debug_exception(ctx); > + return; > + } > + > + switch (is_jmp) { > + case DISAS_TOO_MANY: > + if (use_goto_tb(ctx, nip)) { > + tcg_gen_goto_tb(0); > + gen_update_nip(ctx, nip); > + tcg_gen_exit_tb(ctx->base.tb, 0); > + break; > + } > + /* fall through */ > + case DISAS_CHAIN_UPDATE: > + gen_update_nip(ctx, nip); > + /* fall through */ > + case DISAS_CHAIN: > + tcg_gen_lookup_and_goto_ptr(); > + break; > + > + case DISAS_EXIT_UPDATE: > + gen_update_nip(ctx, nip); > + /* fall through */ > + case DISAS_EXIT: > tcg_gen_exit_tb(NULL, 0); > + break; > + > + default: > + g_assert_not_reached(); > } > } >
diff --git a/target/ppc/translate.c b/target/ppc/translate.c index 7b23f85c11..4bebb00bb2 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -182,6 +182,11 @@ struct DisasContext { uint64_t insns_flags2; }; +#define DISAS_EXIT DISAS_TARGET_0 /* exit to main loop, pc updated */ +#define DISAS_EXIT_UPDATE DISAS_TARGET_1 /* exit to main loop, pc stale */ +#define DISAS_CHAIN DISAS_TARGET_2 /* lookup next tb, pc updated */ +#define DISAS_CHAIN_UPDATE DISAS_TARGET_3 /* lookup next tb, pc stale */ + /* Return true iff byteswap is needed in a scalar memop */ static inline bool need_byteswap(const DisasContext *ctx) { @@ -9417,28 +9422,78 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs) opc3(ctx->opcode), opc4(ctx->opcode), ctx->opcode); } - if (ctx->base.is_jmp == DISAS_NEXT - && ctx->exception != POWERPC_EXCP_NONE) { - ctx->base.is_jmp = DISAS_TOO_MANY; + if (ctx->base.is_jmp == DISAS_NEXT) { + switch (ctx->exception) { + case POWERPC_EXCP_NONE: + break; + case POWERPC_EXCP_BRANCH: + ctx->base.is_jmp = DISAS_NORETURN; + break; + case POWERPC_EXCP_SYNC: + case POWERPC_EXCP_STOP: + ctx->base.is_jmp = DISAS_EXIT; + break; + default: + /* Every other ctx->exception should have set NORETURN. */ + g_assert_not_reached(); + } } } static void ppc_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs) { DisasContext *ctx = container_of(dcbase, DisasContext, base); + DisasJumpType is_jmp = ctx->base.is_jmp; + target_ulong nip = ctx->base.pc_next; - if (ctx->base.is_jmp == DISAS_NORETURN) { + if (is_jmp == DISAS_NORETURN) { + /* We have already exited the TB. */ return; } - if (ctx->exception == POWERPC_EXCP_NONE) { - gen_goto_tb(ctx, 0, ctx->base.pc_next); - } else if (ctx->exception != POWERPC_EXCP_BRANCH) { - if (unlikely(ctx->base.singlestep_enabled)) { - gen_debug_exception(ctx); + /* Honor single stepping. */ + if (unlikely(ctx->base.singlestep_enabled)) { + switch (is_jmp) { + case DISAS_TOO_MANY: + case DISAS_EXIT_UPDATE: + case DISAS_CHAIN_UPDATE: + gen_update_nip(ctx, nip); + break; + case DISAS_EXIT: + case DISAS_CHAIN: + break; + default: + g_assert_not_reached(); } - /* Generate the return instruction */ + gen_debug_exception(ctx); + return; + } + + switch (is_jmp) { + case DISAS_TOO_MANY: + if (use_goto_tb(ctx, nip)) { + tcg_gen_goto_tb(0); + gen_update_nip(ctx, nip); + tcg_gen_exit_tb(ctx->base.tb, 0); + break; + } + /* fall through */ + case DISAS_CHAIN_UPDATE: + gen_update_nip(ctx, nip); + /* fall through */ + case DISAS_CHAIN: + tcg_gen_lookup_and_goto_ptr(); + break; + + case DISAS_EXIT_UPDATE: + gen_update_nip(ctx, nip); + /* fall through */ + case DISAS_EXIT: tcg_gen_exit_tb(NULL, 0); + break; + + default: + g_assert_not_reached(); } }