From patchwork Tue Jun 25 13:06:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 11015537 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A76901398 for ; Tue, 25 Jun 2019 13:18:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 942301FF81 for ; Tue, 25 Jun 2019 13:18:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 859F528734; Tue, 25 Jun 2019 13:18:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C374C1FF81 for ; Tue, 25 Jun 2019 13:18:30 +0000 (UTC) Received: from localhost ([::1]:60116 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hflLC-0001Xk-2b for patchwork-qemu-devel@patchwork.kernel.org; Tue, 25 Jun 2019 09:18:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50953) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hflAU-0001DA-Oz for qemu-devel@nongnu.org; Tue, 25 Jun 2019 09:07:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hflAQ-0007ny-TA for qemu-devel@nongnu.org; Tue, 25 Jun 2019 09:07:24 -0400 Received: from telepax.uni-paderborn.de ([131.234.189.14]:50808) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hflAN-0007gu-9p for qemu-devel@nongnu.org; Tue, 25 Jun 2019 09:07:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.uni-paderborn.de; s=20170601; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=sX1mU8mDb7NpK39AZ1baVGHeDU9x5UyiX+zE47nhvKs=; b=LERcHrdOzIVEr6uqyV/Kf5kNub hYPzDrdcyIeqxgyniae466zMK1tGcmjUno5eJZiaPt6LPgjRpDMlDi2opVPW4Qkn3unTRO0MtdXJ8 SuoZwJ+GdekuH0/Bzck5q8hVR1xNnr02ilVPboMYaCYqw92SRMO2Jp1o/pYAbrsPL4yo=; From: Bastian Koppelmann To: qemu-devel@nongnu.org Date: Tue, 25 Jun 2019 15:06:58 +0200 Message-Id: <20190625130658.24895-6-kbastian@mail.uni-paderborn.de> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190625130658.24895-1-kbastian@mail.uni-paderborn.de> References: <20190625130658.24895-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 X-IMT-Spam-Score: 0.0 () X-PMX-Version: 6.4.6.2792898, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2019.6.25.125716, AntiVirus-Engine: 5.63.0, AntiVirus-Data: 2019.6.18.5630002 X-IMT-Authenticated-Sender: uid=kbastian,ou=People,o=upb,c=de X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 131.234.189.14 Subject: [Qemu-devel] [PULL 5/5] tricore: add QSEED instruction 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: peter.maydell@linaro.org, Lars Biermanski , Andreas Konopik , Georg Hofstetter , David Brenken , Robert Rasche , Andreas Konopik Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Andreas Konopik Signed-off-by: Andreas Konopik Signed-off-by: David Brenken Signed-off-by: Georg Hofstetter Signed-off-by: Robert Rasche Signed-off-by: Lars Biermanski Reviewed-by: Bastian Koppelmann Message-Id: <20190624070339.4408-6-david.brenken@efs-auto.org> Signed-off-by: Bastian Koppelmann [BK: Added fp_status arg to float32_is_signaling_nan()] --- target/tricore/fpu_helper.c | 85 +++++++++++++++++++++++++++++++++++++ target/tricore/helper.h | 1 + target/tricore/translate.c | 3 ++ 3 files changed, 89 insertions(+) diff --git a/target/tricore/fpu_helper.c b/target/tricore/fpu_helper.c index 432079c8e2..cb7ee7dd35 100644 --- a/target/tricore/fpu_helper.c +++ b/target/tricore/fpu_helper.c @@ -24,6 +24,7 @@ #define QUIET_NAN 0x7fc00000 #define ADD_NAN 0x7fc00001 +#define SQRT_NAN 0x7fc00004 #define DIV_NAN 0x7fc00008 #define MUL_NAN 0x7fc00002 #define FPU_FS PSW_USB_C @@ -32,6 +33,9 @@ #define FPU_FZ PSW_USB_AV #define FPU_FU PSW_USB_SAV +#define float32_sqrt_nan make_float32(SQRT_NAN) +#define float32_quiet_nan make_float32(QUIET_NAN) + /* we don't care about input_denormal */ static inline uint8_t f_get_excp_flags(CPUTriCoreState *env) { @@ -166,6 +170,87 @@ uint32_t helper_fmul(CPUTriCoreState *env, uint32_t r1, uint32_t r2) } +/* + * Target TriCore QSEED.F significand Lookup Table + * + * The QSEED.F output significand depends on the least-significant + * exponent bit and the 6 most-significant significand bits. + * + * IEEE 754 float datatype + * partitioned into Sign (S), Exponent (E) and Significand (M): + * + * S E E E E E E E E M M M M M M ... + * | | | + * +------+------+-------+-------+ + * | | + * for lookup table + * calculating index for + * output E output M + * + * This lookup table was extracted by analyzing QSEED output + * from the real hardware + */ +static const uint8_t target_qseed_significand_table[128] = { + 253, 252, 245, 244, 239, 238, 231, 230, 225, 224, 217, 216, + 211, 210, 205, 204, 201, 200, 195, 194, 189, 188, 185, 184, + 179, 178, 175, 174, 169, 168, 165, 164, 161, 160, 157, 156, + 153, 152, 149, 148, 145, 144, 141, 140, 137, 136, 133, 132, + 131, 130, 127, 126, 123, 122, 121, 120, 117, 116, 115, 114, + 111, 110, 109, 108, 103, 102, 99, 98, 93, 92, 89, 88, 83, + 82, 79, 78, 75, 74, 71, 70, 67, 66, 63, 62, 59, 58, 55, + 54, 53, 52, 49, 48, 45, 44, 43, 42, 39, 38, 37, 36, 33, + 32, 31, 30, 27, 26, 25, 24, 23, 22, 19, 18, 17, 16, 15, + 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2 +}; + +uint32_t helper_qseed(CPUTriCoreState *env, uint32_t r1) +{ + uint32_t arg1, S, E, M, E_minus_one, m_idx; + uint32_t new_E, new_M, new_S, result; + + arg1 = make_float32(r1); + + /* fetch IEEE-754 fields S, E and the uppermost 6-bit of M */ + S = extract32(arg1, 31, 1); + E = extract32(arg1, 23, 8); + M = extract32(arg1, 17, 6); + + if (float32_is_any_nan(arg1)) { + result = float32_quiet_nan; + } else if (float32_is_zero_or_denormal(arg1)) { + if (float32_is_neg(arg1)) { + result = float32_infinity | (1 << 31); + } else { + result = float32_infinity; + } + } else if (float32_is_neg(arg1)) { + result = float32_sqrt_nan; + } else if (float32_is_infinity(arg1)) { + result = float32_zero; + } else { + E_minus_one = E - 1; + m_idx = ((E_minus_one & 1) << 6) | M; + new_S = S; + new_E = 0xBD - E_minus_one / 2; + new_M = target_qseed_significand_table[m_idx]; + + result = 0; + result = deposit32(result, 31, 1, new_S); + result = deposit32(result, 23, 8, new_E); + result = deposit32(result, 15, 8, new_M); + } + + if (float32_is_signaling_nan(arg1, &env->fp_status) + || result == float32_sqrt_nan) { + env->FPU_FI = 1 << 31; + env->FPU_FS = 1; + } else { + env->FPU_FS = 0; + } + + return (uint32_t) result; +} + uint32_t helper_fdiv(CPUTriCoreState *env, uint32_t r1, uint32_t r2) { uint32_t flags; diff --git a/target/tricore/helper.h b/target/tricore/helper.h index f1a5cb367e..b64780c37d 100644 --- a/target/tricore/helper.h +++ b/target/tricore/helper.h @@ -109,6 +109,7 @@ DEF_HELPER_3(fdiv, i32, env, i32, i32) DEF_HELPER_4(fmadd, i32, env, i32, i32, i32) DEF_HELPER_4(fmsub, i32, env, i32, i32, i32) DEF_HELPER_3(fcmp, i32, env, i32, i32) +DEF_HELPER_2(qseed, i32, env, i32) DEF_HELPER_2(ftoi, i32, env, i32) DEF_HELPER_2(itof, i32, env, i32) DEF_HELPER_2(utof, i32, env, i32) diff --git a/target/tricore/translate.c b/target/tricore/translate.c index c79566e56a..dc2a65f3f9 100644 --- a/target/tricore/translate.c +++ b/target/tricore/translate.c @@ -6753,6 +6753,9 @@ static void decode_rr_divide(CPUTriCoreState *env, DisasContext *ctx) case OPC2_32_RR_FTOIZ: gen_helper_ftoiz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]); break; + case OPC2_32_RR_QSEED_F: + gen_helper_qseed(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]); + break; default: generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC); }