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Mon, 5 Feb 2024 20:58:33 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4B6EE20040; Mon, 5 Feb 2024 20:58:33 +0000 (GMT) Received: from heavy.ibm.com (unknown [9.171.57.170]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 5 Feb 2024 20:58:33 +0000 (GMT) From: Ilya Leoshkevich To: Richard Henderson , David Hildenbrand , Thomas Huth Cc: qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Ilya Leoshkevich , Pavel Zbitskiy Subject: [PATCH v5 2/4] target/s390x: Emulate CVB, CVBY and CVBG Date: Mon, 5 Feb 2024 21:54:54 +0100 Message-ID: <20240205205830.6425-3-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240205205830.6425-1-iii@linux.ibm.com> References: <20240205205830.6425-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: dUvxRpzwE-tkTxIuKj76DjrFU-PjpnFK X-Proofpoint-GUID: 0oiFIayoIIGPcKZ9sS21NFBXAhcNzReM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-05_14,2024-01-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=798 spamscore=0 phishscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402050157 Received-SPF: pass client-ip=148.163.156.1; envelope-from=iii@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Convert to Binary - counterparts of the already implemented Convert to Decimal (CVD*) instructions. Example from the Principles of Operation: 25594C becomes 63FA. Co-developed-by: Pavel Zbitskiy Signed-off-by: Ilya Leoshkevich Reviewed-by: Thomas Huth --- target/s390x/helper.h | 2 + target/s390x/tcg/insn-data.h.inc | 4 ++ target/s390x/tcg/int_helper.c | 76 ++++++++++++++++++++++++++++++++ target/s390x/tcg/translate.c | 16 +++++++ 4 files changed, 98 insertions(+) diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 332a9a9c632..cc1c20e9e3f 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -88,6 +88,8 @@ DEF_HELPER_FLAGS_3(tcxb, TCG_CALL_NO_RWG_SE, i32, env, i128, i64) DEF_HELPER_FLAGS_2(sqeb, TCG_CALL_NO_WG, i64, env, i64) DEF_HELPER_FLAGS_2(sqdb, TCG_CALL_NO_WG, i64, env, i64) DEF_HELPER_FLAGS_2(sqxb, TCG_CALL_NO_WG, i128, env, i128) +DEF_HELPER_3(cvb, void, env, i32, i64) +DEF_HELPER_FLAGS_2(cvbg, TCG_CALL_NO_WG, i64, env, i128) DEF_HELPER_FLAGS_1(cvd, TCG_CALL_NO_RWG_SE, i64, s32) DEF_HELPER_FLAGS_1(cvdg, TCG_CALL_NO_RWG_SE, i128, s64) DEF_HELPER_FLAGS_4(pack, TCG_CALL_NO_WG, void, env, i32, i64, i64) diff --git a/target/s390x/tcg/insn-data.h.inc b/target/s390x/tcg/insn-data.h.inc index 388dcb8dbbc..e7d61cdec28 100644 --- a/target/s390x/tcg/insn-data.h.inc +++ b/target/s390x/tcg/insn-data.h.inc @@ -293,6 +293,10 @@ D(0xec73, CLFIT, RIE_a, GIE, r1_32u, i2_16u, 0, 0, ct, 0, 1) D(0xec71, CLGIT, RIE_a, GIE, r1_o, i2_16u, 0, 0, ct, 0, 1) +/* CONVERT TO BINARY */ + C(0x4f00, CVB, RX_a, Z, la2, 0, 0, 0, cvb, 0) + C(0xe306, CVBY, RXY_a, LD, la2, 0, 0, 0, cvb, 0) + C(0xe30e, CVBG, RXY_a, Z, la2, 0, r1, 0, cvbg, 0) /* CONVERT TO DECIMAL */ C(0x4e00, CVD, RX_a, Z, r1_o, a2, 0, 0, cvd, 0) C(0xe326, CVDY, RXY_a, LD, r1_o, a2, 0, 0, cvd, 0) diff --git a/target/s390x/tcg/int_helper.c b/target/s390x/tcg/int_helper.c index 121e3006a65..2af970f2c8b 100644 --- a/target/s390x/tcg/int_helper.c +++ b/target/s390x/tcg/int_helper.c @@ -25,6 +25,7 @@ #include "exec/exec-all.h" #include "qemu/host-utils.h" #include "exec/helper-proto.h" +#include "exec/cpu_ldst.h" /* #define DEBUG_HELPER */ #ifdef DEBUG_HELPER @@ -98,6 +99,81 @@ Int128 HELPER(divu64)(CPUS390XState *env, uint64_t ah, uint64_t al, uint64_t b) tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC()); } +void HELPER(cvb)(CPUS390XState *env, uint32_t r1, uint64_t dec) +{ + int64_t pow10 = 1, bin = 0; + int digit, sign; + + sign = dec & 0xf; + if (sign < 0xa) { + tcg_s390_data_exception(env, 0, GETPC()); + } + dec >>= 4; + + while (dec) { + digit = dec & 0xf; + if (digit > 0x9) { + tcg_s390_data_exception(env, 0, GETPC()); + } + dec >>= 4; + bin += digit * pow10; + pow10 *= 10; + } + + if (sign == 0xb || sign == 0xd) { + bin = -bin; + } + + /* R1 is updated even on fixed-point-divide exception. */ + env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) | (uint32_t)bin; + if (bin != (int32_t)bin) { + tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC()); + } +} + +uint64_t HELPER(cvbg)(CPUS390XState *env, Int128 dec) +{ + uint64_t dec64[] = {int128_getlo(dec), int128_gethi(dec)}; + int64_t bin = 0, pow10, tmp; + int digit, i, sign; + + sign = dec64[0] & 0xf; + if (sign < 0xa) { + tcg_s390_data_exception(env, 0, GETPC()); + } + dec64[0] >>= 4; + pow10 = (sign == 0xb || sign == 0xd) ? -1 : 1; + + for (i = 1; i < 20; i++) { + digit = dec64[i >> 4] & 0xf; + if (digit > 0x9) { + tcg_s390_data_exception(env, 0, GETPC()); + } + dec64[i >> 4] >>= 4; + /* + * Prepend the next digit and check for overflow. The multiplication + * cannot overflow, since, conveniently, the int64_t limits are + * approximately +-9.2E+18. If bin is zero, the addition cannot + * overflow. Otherwise bin is known to have the same sign as the rhs + * addend, in which case overflow happens if and only if the result + * has a different sign. + */ + tmp = bin + pow10 * digit; + if (bin && ((tmp ^ bin) < 0)) { + tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC()); + } + bin = tmp; + pow10 *= 10; + } + + g_assert(!dec64[0]); + if (dec64[1]) { + tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC()); + } + + return bin; +} + uint64_t HELPER(cvd)(int32_t reg) { /* positive 0 */ diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index c2fdc920a50..325b25959d3 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -2223,6 +2223,22 @@ static DisasJumpType op_csp(DisasContext *s, DisasOps *o) } #endif +static DisasJumpType op_cvb(DisasContext *s, DisasOps *o) +{ + TCGv_i64 t = tcg_temp_new_i64(); + tcg_gen_qemu_ld_i64(t, o->addr1, get_mem_index(s), MO_TEUQ); + gen_helper_cvb(tcg_env, tcg_constant_i32(get_field(s, r1)), t); + return DISAS_NEXT; +} + +static DisasJumpType op_cvbg(DisasContext *s, DisasOps *o) +{ + TCGv_i128 t = tcg_temp_new_i128(); + tcg_gen_qemu_ld_i128(t, o->addr1, get_mem_index(s), MO_TE | MO_128); + gen_helper_cvbg(o->out, tcg_env, t); + return DISAS_NEXT; +} + static DisasJumpType op_cvd(DisasContext *s, DisasOps *o) { TCGv_i64 t1 = tcg_temp_new_i64();