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Violators will be prosecuted; Thu, 11 Aug 2016 00:31:37 +0530 X-IBM-Helo: d28dlp02.in.ibm.com X-IBM-MailFrom: nikunj@linux.vnet.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org;qemu-ppc@nongnu.org Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id A20C7394004E; Thu, 11 Aug 2016 00:31:36 +0530 (IST) Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay02.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u7AJ1OK046727312; Thu, 11 Aug 2016 00:31:24 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u7AJ1Xqa004793; Thu, 11 Aug 2016 00:31:34 +0530 Received: from abhimanyu.in.ibm.com ([9.79.198.122]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u7AJ18Ax003198; Thu, 11 Aug 2016 00:31:22 +0530 From: Nikunj A Dadhania To: qemu-ppc@nongnu.org, david@gibson.dropbear.id.au, rth@twiddle.net Date: Thu, 11 Aug 2016 00:31:00 +0530 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1470855666-31696-1-git-send-email-nikunj@linux.vnet.ibm.com> References: <1470855666-31696-1-git-send-email-nikunj@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16081019-4789-0000-0000-000003158344 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16081019-4790-0000-0000-0000117D2A43 Message-Id: <1470855666-31696-5-git-send-email-nikunj@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-08-10_15:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1608100195 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v1 04/10] target-ppc: Implement darn instruction 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: qemu-devel@nongnu.org, nikunj@linux.vnet.ibm.com, Ravi Bangoria Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Ravi Bangoria darn: Deliver A Random Number For both CRN and RRN, returning 64-bit random number. Signed-off-by: Ravi Bangoria [ use /dev/random to get the number ] Signed-off-by: Nikunj A Dadhania --- target-ppc/helper.h | 2 ++ target-ppc/int_helper.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ target-ppc/translate.c | 18 +++++++++++++++++ 3 files changed, 71 insertions(+) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 8eada2f..0e55d48 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -50,6 +50,8 @@ DEF_HELPER_FLAGS_1(cnttzd, TCG_CALL_NO_RWG_SE, tl, tl) DEF_HELPER_FLAGS_1(popcntd, TCG_CALL_NO_RWG_SE, tl, tl) DEF_HELPER_FLAGS_2(bpermd, TCG_CALL_NO_RWG_SE, i64, i64, i64) DEF_HELPER_3(srad, tl, env, tl, tl) +DEF_HELPER_0(darn32, tl) +DEF_HELPER_0(darn64, tl) #endif DEF_HELPER_FLAGS_1(cntlsw32, TCG_CALL_NO_RWG_SE, i32, i32) diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 552b2e0..5b70054 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -182,6 +182,57 @@ target_ulong helper_cnttzd(target_ulong t) { return ctz64(t); } + +#define FILE_DEV_RANDOM "/dev/random" + +static bool get_random(char *s, size_t size) +{ + int fd; + size_t bytes_read; + + fd = open(FILE_DEV_RANDOM, O_RDONLY); + if (fd < 0) { + return false; + } + + while (size > 0) { + bytes_read = read(fd, s, size); + if (bytes_read <= 0) { + close(fd); + return false; + } + size -= bytes_read; + s += bytes_read; + } + close(fd); + return true; +} + +target_ulong helper_darn32(void) +{ + char s[4]; + if (!get_random(s, 4)) { + return 0; + } + + return *((uint32_t *)s); +} + +target_ulong helper_darn64(void) +{ + char s[8]; + uint64_t val; + + do { + if (!get_random(s, 8)) { + return -1; + } + val = *((uint64_t *)s); + } while (val == UINT64_MAX); + + return val; +} + #endif #if defined(TARGET_PPC64) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index c7bbe28..67eac9f 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -526,6 +526,8 @@ EXTRACT_HELPER(FPW, 16, 1); /* addpcis */ EXTRACT_HELPER_DXFORM(DX, 10, 6, 6, 5, 16, 1, 1, 0, 0) +/* darn */ +EXTRACT_HELPER(L, 16, 2); /*** Jump target decoding ***/ /* Immediate address */ @@ -1893,6 +1895,21 @@ static void gen_cnttzd(DisasContext *ctx) gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]); } } + +/* darn */ +static void gen_darn(DisasContext *ctx) +{ + int l = L(ctx->opcode); + + if (l == 0) { + gen_helper_darn32(cpu_gpr[rD(ctx->opcode)]); + } else if (l <= 2) { + /* Return 64-bit random for both CRN and RRN */ + gen_helper_darn64(cpu_gpr[rD(ctx->opcode)]); + } else { + tcg_gen_movi_i64(cpu_gpr[rD(ctx->opcode)], -1); + } +} #endif /*** Integer rotate ***/ @@ -6219,6 +6236,7 @@ GEN_HANDLER_E(prtyw, 0x1F, 0x1A, 0x04, 0x0000F801, PPC_NONE, PPC2_ISA205), GEN_HANDLER(popcntd, 0x1F, 0x1A, 0x0F, 0x0000F801, PPC_POPCNTWD), GEN_HANDLER(cntlzd, 0x1F, 0x1A, 0x01, 0x00000000, PPC_64B), GEN_HANDLER_E(cnttzd, 0x1F, 0x1A, 0x11, 0x00000000, PPC_NONE, PPC2_ISA300), +GEN_HANDLER_E(darn, 0x1F, 0x13, 0x17, 0x001CF801, PPC_NONE, PPC2_ISA300), GEN_HANDLER_E(prtyd, 0x1F, 0x1A, 0x05, 0x0000F801, PPC_NONE, PPC2_ISA205), GEN_HANDLER_E(bpermd, 0x1F, 0x1C, 0x07, 0x00000001, PPC_NONE, PPC2_PERM_ISA206), #endif