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[80.29.7.251]) by smtp.gmail.com with ESMTPSA id i199sm3056470wmf.33.2017.04.27.05.00.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Apr 2017 05:00:34 -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; bh=dBmwEVB48wsKeXdziLR1GCg4mcvU+OTonPoNNJb7lI4=; b=EKQn7ms4u5vk1efurYxr4JkEk2nghIC+lVgGyoTEtaQyiZKQ1Fgd3N+kkTxvLa7fSG U5O7oJ0DIBZGid+GIUYpgyVUKbsK+xCy5h+D2mR71MQegT4lrwLw7zuEH2ZJ/w8IS+77 jUs5vPBCHgaJ3c97S5RdXzNtD9XIs+GI2pVW0iySc823vZbHXy2DX/YBEgOT/W+uAH4T Y8NAL28YLZjsvet5syJ38zEEFpmPJ7sgpOQUNeMF1qq0SuFDekPNghn7RrDr90bXa6nW Zz0HBa6SZu9dxmT8WZcIErQmIwW1yqDtsEt/GYVDJr0zgoO9NTswtXs6dm/CTiaA/K7A 5hrA== 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; bh=dBmwEVB48wsKeXdziLR1GCg4mcvU+OTonPoNNJb7lI4=; b=JIhfXGoX0aaFYCiPrYaVoxxppbubzEWpp7xGzsPydVXxPr/fpNcFhXv18eMkPTm8IF tz8T085T/pfUgd14R7xHSkzU1abuCkJehp/OBADuFAjlA5rlgPoaF4kQqKo+ubfHmWCY h/cCN/V/ileYvH27ME6tXwniRsdi3SlfmerS9yKKRLByIxbxgHWflJ7fZt5slfBKthQ5 Xz0nBvgPaHp4x/9ueUnMDM0UlysUxSN3Rv4Gc2UDEpfW6JDsgFWDda6CJ3swdajXzzmi ZPNlCFCX2ubTIaxzuZz8JMJ/ogKDcXswqXcmBNJZdeLt24aUrg0pi/q2XQKagM3gZcsQ Myyg== X-Gm-Message-State: AN3rC/5HA4SQYb+/6qzXaK8qZLBS9RISx+SShjJGKh97hiKLknfCyf0V JkmC6j/wvntHmRIFFMU= X-Received: by 10.223.152.175 with SMTP id w44mr3253536wrb.122.1493294435754; Thu, 27 Apr 2017 05:00:35 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 27 Apr 2017 14:00:06 +0200 Message-Id: <20170427120006.20564-20-rth@twiddle.net> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427120006.20564-1-rth@twiddle.net> References: <20170427120006.20564-1-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:400c:c0c::244 Subject: [Qemu-devel] [PATCH v5 19/19] tcg/s390: Implement goto_ptr X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cota@braap.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- tcg/s390/tcg-target.h | 2 +- tcg/s390/tcg-target.inc.c | 24 +++++++++++++++++++++--- 2 files changed, 22 insertions(+), 4 deletions(-) diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h index 6b7bcfb..957f0c0 100644 --- a/tcg/s390/tcg-target.h +++ b/tcg/s390/tcg-target.h @@ -92,7 +92,7 @@ extern uint64_t s390_facilities; #define TCG_TARGET_HAS_mulsh_i32 0 #define TCG_TARGET_HAS_extrl_i64_i32 0 #define TCG_TARGET_HAS_extrh_i64_i32 0 -#define TCG_TARGET_HAS_goto_ptr 0 +#define TCG_TARGET_HAS_goto_ptr 1 =20 #define TCG_TARGET_HAS_div2_i64 1 #define TCG_TARGET_HAS_rot_i64 1 diff --git a/tcg/s390/tcg-target.inc.c b/tcg/s390/tcg-target.inc.c index a679280..5d7083e 100644 --- a/tcg/s390/tcg-target.inc.c +++ b/tcg/s390/tcg-target.inc.c @@ -1741,9 +1741,14 @@ static inline void tcg_out_op(TCGContext *s, TCGOpco= de opc, =20 switch (opc) { case INDEX_op_exit_tb: - /* return value */ - tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, args[0]); - tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr); + /* Reuse the zeroing that exists for goto_ptr. */ + a0 =3D args[0]; + if (a0 =3D=3D 0) { + tgen_gotoi(s, S390_CC_ALWAYS, s->code_gen_epilogue); + } else { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, a0); + tgen_gotoi(s, S390_CC_ALWAYS, tb_ret_addr); + } break; =20 case INDEX_op_goto_tb: @@ -1767,6 +1772,10 @@ static inline void tcg_out_op(TCGContext *s, TCGOpco= de opc, s->tb_jmp_reset_offset[args[0]] =3D tcg_current_code_size(s); break; =20 + case INDEX_op_goto_ptr: + tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, args[0]); + break; + OP_32_64(ld8u): /* ??? LLC (RXY format) is only present with the extended-immediate facility, whereas LLGC is always present. */ @@ -2241,6 +2250,7 @@ static const TCGTargetOpDef s390_op_defs[] =3D { { INDEX_op_exit_tb, { } }, { INDEX_op_goto_tb, { } }, { INDEX_op_br, { } }, + { INDEX_op_goto_ptr, { "r" } }, =20 { INDEX_op_ld8u_i32, { "r", "r" } }, { INDEX_op_ld8s_i32, { "r", "r" } }, @@ -2439,6 +2449,14 @@ static void tcg_target_qemu_prologue(TCGContext *s) /* br %r3 (go to TB) */ tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, tcg_target_call_iarg_regs[1]); =20 + /* + * Return path for goto_ptr. Set return value to 0, a-la exit_tb, + * and fall through to the rest of the epilogue. + */ + s->code_gen_epilogue =3D s->code_ptr; + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R2, 0); + + /* TB epilogue */ tb_ret_addr =3D s->code_ptr; =20 /* lmg %r6,%r15,fs+48(%r15) (restore registers) */ --=20 2.9.3