From nobody Tue Jul 28 08:58:42 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=sifive.com ARC-Seal: i=1; a=rsa-sha256; t=1777270300; cv=none; d=zohomail.com; s=zohoarc; b=lD7efzDknur2g6iFog1/c0mwZ8vcsbKj8RnRbf704A1bIr5KxisxaGjWJw16u17aMpHCcVR88OR/YPIPwKXwnQezIrgTbs9gsI+C4NWWxcefZ5rCmtyuDp9ELZC0QMgDXq4HXRCzOjQgXCDBMrW116Ki1zZtliD6c7CdWN6a2J8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1777270300; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=WkmRPpZi05j+i+tKq5//n/+335dDi6qLXvoGPu5RWTU=; b=KYSAupiJwEnrVnuRN+lMtwHNfRKhuXcK6MoQfMKOBrKDESisrHxsM7uNeBQzw+j8eCePipKkUR7+ZqadbBPHvs0auVnzu0pNk/9BuOgwVLEj9uqlxaBbct2gkGTwQxTvSVHHU82mB8wPlcNNEPL+zFaixErauUEnc6tjlyyN7WE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1777270300834812.0213773318621; Sun, 26 Apr 2026 23:11:40 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wHFAX-00061c-Bc; Mon, 27 Apr 2026 02:10:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wHFAL-0005XS-9K for qemu-devel@nongnu.org; Mon, 27 Apr 2026 02:09:59 -0400 Received: from mail-pj1-x102b.google.com ([2607:f8b0:4864:20::102b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wHFAJ-0000tb-FM for qemu-devel@nongnu.org; Mon, 27 Apr 2026 02:09:56 -0400 Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-358ed696623so4327965a91.0 for ; Sun, 26 Apr 2026 23:09:55 -0700 (PDT) Received: from duncan.localdomain (114-35-142-126.hinet-ip.hinet.net. [114.35.142.126]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-361410bac6dsm30290710a91.14.2026.04.26.23.09.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Apr 2026 23:09:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1777270194; x=1777874994; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WkmRPpZi05j+i+tKq5//n/+335dDi6qLXvoGPu5RWTU=; b=JaldVvF9RRV4kM+xD4v94CnfSbRWYgImu9adG+K2hnXTIN9uLnv5iJCaiKhmfpZncA A3fblxNK0B4XvzhM/cZCbiekZEdxAB8r7kPcrWR3dp7PIZnWngS1VdnK55tr/n6Ex8Rb SyvnVXjBcF/tLT3V606YQcGGguYp0caTixY7OS/U8Y42z8Ni6sKHMkwjPKqRR1gRVjUr 4kOYMxIqJifDJ5U3XfqC1WWL6tll4b3Yo3WNo8xwcYXgtdsZd9n7mkiBW4hD/9wSXMgG 1cDR/q937btEesmKW3+5qYBo/0wdRutxhtyaLWyT0abPOqNhvA2XG0tjqYZDQWv5g540 JQvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777270194; x=1777874994; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=WkmRPpZi05j+i+tKq5//n/+335dDi6qLXvoGPu5RWTU=; b=fXfD0oVdXuRnWocjjFS5O69hwaDLBvkFMkiZo2NgxHqc57CBjzhFnTB+kwKwfecLC2 dtbawm6oR/pehEPjOu2hipSg+9EgDvnIQusY+jZVDO7hAG8S5PUt0k9ai4s6j/nkjV4i iEj8scft8MJFg3c3EdEyDx5kccFJWOWewPlNnWeUc0aftwSZDjk/zDHYnAjW1LHejvwk s0RkKh3afC+jknS5BhLhB5wMQhvRTzkRwwcnVQsYIKL8QbntriYLgPj29zkBz3MobDbj UeebIRVQ7rgA7RO7y1ab9quNChaVnA1CK+ZWXjjdRyx9Tq9iwDGsZPGrXduLvh7XCc0L izQQ== X-Gm-Message-State: AOJu0YxzOU1fZoIcSVe88qF8BDuBvHRKIsbJkU5ZwbdHP09YM+tyP7an bBO9DKbiHtMNvlIRGgCQx41b1r3ZJ6XJ5oF/Y++/9ONgpmyG9GRvluoC/6qqJVKdevXXxf+Td+r 1uZhNrsKSmZ+1oy3fM3qco+I2j5BFj6BaACGGFjxyJpNbg7CTI629qn1/Ui0vlIrq8UUr92xrwM U3Kk/eD3+t1jQvjSKU9hntC7AJ/4eGF7ILDpvO5HY= X-Gm-Gg: AeBDievh3KXZZ5Xsbd8ZjAJ33xDKlCqkP9FAiz2add8yNnWEblPVIRS/ztYI+biJSUY QTjS38ukmG6NF1r8Vj4OxhlAb/ARoIndH4BbrIeZqMqYjTxpCBCAS6DIq2Ob/UwHAhpKZhtBoK6 rfw7lPGtwKhSknE6q6kAdGpWl7dtUKt+4NwPEuHA3DGWK/dtZrKfC0u138G18AtudycP+SRVNTl TwgLuVL7Vdi/yL2nRB5L0ZKiIwzKJ27dSprsXspxZv9OUommniLLfThqJn0VMU4sGpjqpHylyCo q+NQvwQOXP0/q+x8/3RHQ0pILuO+KIYdSwe2EPX6IP+Lnlru7QzJWkipF6zIAHi56kozR1D8C8X OhRge9dYTi+AkDUkt6btlE6nYmRBVQghVo67c61aZrSqCh5Ba/JC2Yf1cNR/eI/zxpbQPY4DOEp nLehpqFpDkRDKp+5RHbzU6EVjzcPWnX2uKBtAdNJVO0PIwXiXleOHt+QG55k9jFPNKnbh+9nXMA NTVpKqXcRtVLHA1zXoSgsWzlVODb8VW60gTew== X-Received: by 2002:a17:90b:4a0a:b0:35e:58d3:3284 with SMTP id 98e67ed59e1d1-361403e083bmr41767194a91.9.1777270193852; Sun, 26 Apr 2026 23:09:53 -0700 (PDT) From: Max Chou To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Daniel Henrique Barboza , Weiwei Li , Liu Zhiwei , Chao Liu , Max Chou , Alistair Francis Subject: [PATCH v5 6/9] target/riscv: rvv: Add vfncvtbf16.sat.f.f.w instruction for Zvfofp8min extension Date: Mon, 27 Apr 2026 14:09:25 +0800 Message-ID: <20260427060928.2322570-7-max.chou@sifive.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260427060928.2322570-1-max.chou@sifive.com> References: <20260427060928.2322570-1-max.chou@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::102b; envelope-from=max.chou@sifive.com; helo=mail-pj1-x102b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @sifive.com) X-ZM-MESSAGEID: 1777270301399154100 Content-Type: text/plain; charset="utf-8" The vfncvtbf16.sat.f.f.w instruction converts a vector of 16-bit floating-point numbers to a vector of 8-bit floating-point numbers with saturation. The VTYPE.altfmt field is used to select the format of the 8-bit floating-p= oint numbers. * altfmt =3D 0: BF16 to OFP8.e4m3 * altfmt =3D 1: BF16 to OFP8.e5m2 Reviewed-by: Chao Liu Signed-off-by: Max Chou --- target/riscv/insn32.decode | 3 ++ target/riscv/insn_trans/trans_rvofp8.c.inc | 42 ++++++++++++++++++++++ target/riscv/translate.c | 1 + 3 files changed, 46 insertions(+) create mode 100644 target/riscv/insn_trans/trans_rvofp8.c.inc diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 6e35c4b1e6..49201c0c20 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -973,6 +973,9 @@ vfwcvtbf16_f_f_v 010010 . ..... 01101 001 ..... 101011= 1 @r2_vm vfwmaccbf16_vv 111011 . ..... ..... 001 ..... 1010111 @r_vm vfwmaccbf16_vf 111011 . ..... ..... 101 ..... 1010111 @r_vm =20 +# *** Zvfofp8min Extension *** +vfncvtbf16_sat_f_f_w 010010 . ..... 11111 001 ..... 1010111 @r2_vm + # *** Zvbc vector crypto extension *** vclmul_vv 001100 . ..... ..... 010 ..... 1010111 @r_vm vclmul_vx 001100 . ..... ..... 110 ..... 1010111 @r_vm diff --git a/target/riscv/insn_trans/trans_rvofp8.c.inc b/target/riscv/insn= _trans/trans_rvofp8.c.inc new file mode 100644 index 0000000000..d28f92e050 --- /dev/null +++ b/target/riscv/insn_trans/trans_rvofp8.c.inc @@ -0,0 +1,42 @@ +/* + * RISC-V translation routines for the OFP8 Standard Extensions. + * + * Copyright (C) 2025 SiFive, Inc. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#define REQUIRE_ZVFOFP8MIN(ctx) do { \ + if (!ctx->cfg_ptr->ext_zvfofp8min) { \ + return false; \ + } \ +} while (0) + + +static bool trans_vfncvtbf16_sat_f_f_w(DisasContext *ctx, arg_rmr *a) +{ + REQUIRE_FPU; + REQUIRE_ZVFOFP8MIN(ctx); + + if (opfv_narrow_check(ctx, a) && ctx->sew =3D=3D MO_8) { + gen_helper_gvec_3_ptr *fn; + uint32_t data =3D 0; + + fn =3D ctx->altfmt ? gen_helper_vfncvtbf16_sat_f_f_w_ofp8e5m2 : + gen_helper_vfncvtbf16_sat_f_f_w_ofp8e4m3; + + gen_set_rm_chkfrm(ctx, RISCV_FRM_DYN); + + data =3D FIELD_DP32(data, VDATA, VM, a->vm); + data =3D FIELD_DP32(data, VDATA, LMUL, ctx->lmul); + data =3D FIELD_DP32(data, VDATA, VTA, ctx->vta); + data =3D FIELD_DP32(data, VDATA, VMA, ctx->vma); + tcg_gen_gvec_3_ptr(vreg_ofs(ctx, a->rd), vreg_ofs(ctx, 0), + vreg_ofs(ctx, a->rs2), tcg_env, + ctx->cfg_ptr->vlenb, + ctx->cfg_ptr->vlenb, data, fn); + finalize_rvv_inst(ctx); + return true; + } + return false; +} diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 81087e0a5d..88d6efbc80 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1220,6 +1220,7 @@ static uint32_t opcode_at(DisasContextBase *dcbase, t= arget_ulong pc) #include "insn_trans/trans_privileged.c.inc" #include "insn_trans/trans_svinval.c.inc" #include "insn_trans/trans_rvbf16.c.inc" +#include "insn_trans/trans_rvofp8.c.inc" #include "decode-xthead.c.inc" #include "decode-xmips.c.inc" #include "decode-xlrbr.c.inc" --=20 2.52.0