From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43861) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bWS0h-0004HG-R9 for qemu-devel@nongnu.org; Sun, 07 Aug 2016 13:37:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bWS0d-0005DE-GF for qemu-devel@nongnu.org; Sun, 07 Aug 2016 13:37:14 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:48366) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bWS0d-0005D5-6M for qemu-devel@nongnu.org; Sun, 07 Aug 2016 13:37:11 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u77HYb68041137 for ; Sun, 7 Aug 2016 13:37:10 -0400 Received: from e23smtp08.au.ibm.com (e23smtp08.au.ibm.com [202.81.31.141]) by mx0a-001b2d01.pphosted.com with ESMTP id 24nce6uy17-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sun, 07 Aug 2016 13:37:10 -0400 Received: from localhost by e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 8 Aug 2016 03:37:08 +1000 From: Nikunj A Dadhania Date: Sun, 7 Aug 2016 23:06:51 +0530 In-Reply-To: <1470591415-3268-1-git-send-email-nikunj@linux.vnet.ibm.com> References: <1470591415-3268-1-git-send-email-nikunj@linux.vnet.ibm.com> Message-Id: <1470591415-3268-3-git-send-email-nikunj@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 2/6] target-ppc: Implement darn instruction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org, david@gibson.dropbear.id.au, rth@twiddle.net Cc: qemu-devel@nongnu.org, nikunj@linux.vnet.ibm.com, benh@kernel.crashing.org, Ravi Bangoria From: Ravi Bangoria darn: Deliver A Random Number For both CRN and RRN, returning 64-bit random number. Signed-off-by: Ravi Bangoria Signed-off-by: Nikunj A Dadhania --- target-ppc/helper.h | 1 + target-ppc/int_helper.c | 14 ++++++++++++++ target-ppc/translate.c | 11 +++++++++++ 3 files changed, 26 insertions(+) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 8eada2f..257bfca 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -50,6 +50,7 @@ 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_1(darn, tl, i32) #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..2b9fe13 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -182,6 +182,20 @@ target_ulong helper_cnttzd(target_ulong t) { return ctz64(t); } + +target_ulong helper_darn(uint32_t l) +{ + target_ulong r = UINT64_MAX; + + if (l <= 2) { + do { + r = random() * random(); + r &= l ? UINT64_MAX : UINT32_MAX; + } while (r == UINT64_MAX); + } + + return r; +} #endif #if defined(TARGET_PPC64) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 2a87d1a..6a79fc1 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 +1895,14 @@ static void gen_cnttzd(DisasContext *ctx) gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]); } } + +/* darn */ +static void gen_darn(DisasContext *ctx) +{ + TCGv_i32 l = tcg_const_i32(L(ctx->opcode)); + gen_helper_darn(cpu_gpr[rD(ctx->opcode)], l); + tcg_temp_free_i32(l); +} #endif /*** Integer rotate ***/ @@ -6238,6 +6248,7 @@ 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 -- 2.7.4