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[83.57.170.138]) by smtp.gmail.com with ESMTPSA id 65sm2253337wma.48.2020.07.07.11.17.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jul 2020 11:17:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JWr7zF+k8oFBsyaHnZf5qsM0o1jG6sfM9SYJG1HYeUM=; b=jT4DaNpEE4YOcx4qp5P0XaCx8Mx7wNMqT1NCsoCSgm++F5ebNoMoJB/GscZiiyMC+6 EHdEc8W7ihimk15aAUoWlMsAK7MRgVz/4oYpzmg4LSMEhsbaofaySkhak1q+4J49/Ybp GPGesCHmf3ZN2IQ716hsWYabKwP7uuAlcOoK0b7fSlgtsezpPmGEbjhAOPzPgjw1MamI QtsUFroqiuKjfE7+tC65dZB/JvQ8NGnhYPJ2DpuUfgunAj4Uq9iqvQMqR+EWDaAvm4qK KZMHF94yN7Uy9FMNcJC0r2FsphmhGRFA/1c0TjDeEAV8COOCjGpKf4ffVefHRIryqJQp 4b/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=JWr7zF+k8oFBsyaHnZf5qsM0o1jG6sfM9SYJG1HYeUM=; b=q5DQodhbIN+NzdzdFcrwF0LBM+wFRjtBRRyiI73l68EjpWDHKkUy06eLshGCv/Kx5x +Eq2J8yhtnh/bJVHt+nFEr0cZWH5m1Fp40wOe4fRj4pB9ahSjRZQcV35kfpVMgtBRSvK tt51C4u4q74WFNKeouJpuNbXbu7kWrqgvO/XxOvUgNe/8L+kOn0xeeQvhr4pHduX7vEU Vd0mFFfdMUNUTjfuumZQjimv99yYVgcnJXBpRUF12hwfqzbuv4KJWZTIVnRuvSfasaSo 9mpUq5+fUNCwix7jQdUqHbZoYtL/BvOVZOwJxudmdne5dc1WRPphMeymgdIgDomzbfZD VrOw== X-Gm-Message-State: AOAM530Mm9Q3Zev6WvK1pgzLl7gnYY08eBxqJNwEa0U48UmUPTUE5rb1 O/Ew7K1V6Ty/HzTS4mTCdPtBpZxm X-Google-Smtp-Source: ABdhPJxadVC0TpsuoHDV9JWPP6VrzLAdqWniZ587VbJwYVRJ3FEFvOGJDLOvybd3XER3E98piuOxaQ== X-Received: by 2002:a7b:c2f7:: with SMTP id e23mr5392818wmk.175.1594145858926; Tue, 07 Jul 2020 11:17:38 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PULL 16/32] target/avr: Add instruction translation - CPU main translation function Date: Tue, 7 Jul 2020 20:16:54 +0200 Message-Id: <20200707181710.30950-17-f4bug@amsat.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200707181710.30950-1-f4bug@amsat.org> References: <20200707181710.30950-1-f4bug@amsat.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::343; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wm1-x343.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: 0 X-Spam_score: 0.0 X-Spam_bar: / X-Spam_report: (0.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=1, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Sarah Harris , Eduardo Habkost , Thomas Huth , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Cleber Rosa , Richard Henderson , Markus Armbruster , Wainer dos Santos Moschetta , Thomas Huth , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Michael Rolnik , Paolo Bonzini , Pavel Dovgalyuk , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Aleksandar Markovic , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Michael Rolnik Add the core of translation mechanism. Co-developed-by: Richard Henderson Co-developed-by: Michael Rolnik Signed-off-by: Michael Rolnik Signed-off-by: Richard Henderson Signed-off-by: Aleksandar Markovic Tested-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Aleksandar Markovic Signed-off-by: Thomas Huth Message-Id: <20200705140315.260514-17-huth@tuxfamily.org> Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- target/avr/translate.c | 213 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 213 insertions(+) diff --git a/target/avr/translate.c b/target/avr/translate.c index ee7811995a..7ad3dec031 100644 --- a/target/avr/translate.c +++ b/target/avr/translate.c @@ -2805,3 +2805,216 @@ static bool trans_WDR(DisasContext *ctx, arg_WDR *a) =20 return true; } + +/* + * Core translation mechanism functions: + * + * - translate() + * - canonicalize_skip() + * - gen_intermediate_code() + * - restore_state_to_opc() + * + */ +static void translate(DisasContext *ctx) +{ + uint32_t opcode =3D next_word(ctx); + + if (!decode_insn(ctx, opcode)) { + gen_helper_unsupported(cpu_env); + ctx->bstate =3D DISAS_NORETURN; + } +} + +/* Standardize the cpu_skip condition to NE. */ +static bool canonicalize_skip(DisasContext *ctx) +{ + switch (ctx->skip_cond) { + case TCG_COND_NEVER: + /* Normal case: cpu_skip is known to be false. */ + return false; + + case TCG_COND_ALWAYS: + /* + * Breakpoint case: cpu_skip is known to be true, via TB_FLAGS_SKI= P. + * The breakpoint is on the instruction being skipped, at the start + * of the TranslationBlock. No need to update. + */ + return false; + + case TCG_COND_NE: + if (ctx->skip_var1 =3D=3D NULL) { + tcg_gen_mov_tl(cpu_skip, ctx->skip_var0); + } else { + tcg_gen_xor_tl(cpu_skip, ctx->skip_var0, ctx->skip_var1); + ctx->skip_var1 =3D NULL; + } + break; + + default: + /* Convert to a NE condition vs 0. */ + if (ctx->skip_var1 =3D=3D NULL) { + tcg_gen_setcondi_tl(ctx->skip_cond, cpu_skip, ctx->skip_var0, = 0); + } else { + tcg_gen_setcond_tl(ctx->skip_cond, cpu_skip, + ctx->skip_var0, ctx->skip_var1); + ctx->skip_var1 =3D NULL; + } + ctx->skip_cond =3D TCG_COND_NE; + break; + } + if (ctx->free_skip_var0) { + tcg_temp_free(ctx->skip_var0); + ctx->free_skip_var0 =3D false; + } + ctx->skip_var0 =3D cpu_skip; + return true; +} + +void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_ins= ns) +{ + CPUAVRState *env =3D cs->env_ptr; + DisasContext ctx =3D { + .tb =3D tb, + .cs =3D cs, + .env =3D env, + .memidx =3D 0, + .bstate =3D DISAS_NEXT, + .skip_cond =3D TCG_COND_NEVER, + .singlestep =3D cs->singlestep_enabled, + }; + target_ulong pc_start =3D tb->pc / 2; + int num_insns =3D 0; + + if (tb->flags & TB_FLAGS_FULL_ACCESS) { + /* + * This flag is set by ST/LD instruction we will regenerate it ONLY + * with mem/cpu memory access instead of mem access + */ + max_insns =3D 1; + } + if (ctx.singlestep) { + max_insns =3D 1; + } + + gen_tb_start(tb); + + ctx.npc =3D pc_start; + if (tb->flags & TB_FLAGS_SKIP) { + ctx.skip_cond =3D TCG_COND_ALWAYS; + ctx.skip_var0 =3D cpu_skip; + } + + do { + TCGLabel *skip_label =3D NULL; + + /* translate current instruction */ + tcg_gen_insn_start(ctx.npc); + num_insns++; + + /* + * this is due to some strange GDB behavior + * let's assume main has address 0x100 + * b main - sets breakpoint at address 0x00000100 (code) + * b *0x100 - sets breakpoint at address 0x00800100 (data) + */ + if (unlikely(!ctx.singlestep && + (cpu_breakpoint_test(cs, OFFSET_CODE + ctx.npc * 2, BP_ANY= ) || + cpu_breakpoint_test(cs, OFFSET_DATA + ctx.npc * 2, BP_ANY= )))) { + canonicalize_skip(&ctx); + tcg_gen_movi_tl(cpu_pc, ctx.npc); + gen_helper_debug(cpu_env); + goto done_generating; + } + + /* Conditionally skip the next instruction, if indicated. */ + if (ctx.skip_cond !=3D TCG_COND_NEVER) { + skip_label =3D gen_new_label(); + if (ctx.skip_var0 =3D=3D cpu_skip) { + /* + * Copy cpu_skip so that we may zero it before the branch. + * This ensures that cpu_skip is non-zero after the label + * if and only if the skipped insn itself sets a skip. + */ + ctx.free_skip_var0 =3D true; + ctx.skip_var0 =3D tcg_temp_new(); + tcg_gen_mov_tl(ctx.skip_var0, cpu_skip); + tcg_gen_movi_tl(cpu_skip, 0); + } + if (ctx.skip_var1 =3D=3D NULL) { + tcg_gen_brcondi_tl(ctx.skip_cond, ctx.skip_var0, 0, skip_l= abel); + } else { + tcg_gen_brcond_tl(ctx.skip_cond, ctx.skip_var0, + ctx.skip_var1, skip_label); + ctx.skip_var1 =3D NULL; + } + if (ctx.free_skip_var0) { + tcg_temp_free(ctx.skip_var0); + ctx.free_skip_var0 =3D false; + } + ctx.skip_cond =3D TCG_COND_NEVER; + ctx.skip_var0 =3D NULL; + } + + translate(&ctx); + + if (skip_label) { + canonicalize_skip(&ctx); + gen_set_label(skip_label); + if (ctx.bstate =3D=3D DISAS_NORETURN) { + ctx.bstate =3D DISAS_CHAIN; + } + } + } while (ctx.bstate =3D=3D DISAS_NEXT + && num_insns < max_insns + && (ctx.npc - pc_start) * 2 < TARGET_PAGE_SIZE - 4 + && !tcg_op_buf_full()); + + if (tb->cflags & CF_LAST_IO) { + gen_io_end(); + } + + bool nonconst_skip =3D canonicalize_skip(&ctx); + + switch (ctx.bstate) { + case DISAS_NORETURN: + assert(!nonconst_skip); + break; + case DISAS_NEXT: + case DISAS_TOO_MANY: + case DISAS_CHAIN: + if (!nonconst_skip) { + /* Note gen_goto_tb checks singlestep. */ + gen_goto_tb(&ctx, 1, ctx.npc); + break; + } + tcg_gen_movi_tl(cpu_pc, ctx.npc); + /* fall through */ + case DISAS_LOOKUP: + if (!ctx.singlestep) { + tcg_gen_lookup_and_goto_ptr(); + break; + } + /* fall through */ + case DISAS_EXIT: + if (ctx.singlestep) { + gen_helper_debug(cpu_env); + } else { + tcg_gen_exit_tb(NULL, 0); + } + break; + default: + g_assert_not_reached(); + } + +done_generating: + gen_tb_end(tb, num_insns); + + tb->size =3D (ctx.npc - pc_start) * 2; + tb->icount =3D num_insns; +} + +void restore_state_to_opc(CPUAVRState *env, TranslationBlock *tb, + target_ulong *data) +{ + env->pc_w =3D data[0]; +} --=20 2.21.3