From patchwork Fri Oct 29 08:59:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Chang X-Patchwork-Id: 12592383 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1739C433EF for ; Fri, 29 Oct 2021 10:06:15 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7BCBF61056 for ; Fri, 29 Oct 2021 10:06:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7BCBF61056 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:60760 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mgOm6-0003zA-Kb for qemu-devel@archiver.kernel.org; Fri, 29 Oct 2021 06:06:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36182) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mgNnW-0000F9-DI for qemu-devel@nongnu.org; Fri, 29 Oct 2021 05:03:38 -0400 Received: from mail-pg1-x52c.google.com ([2607:f8b0:4864:20::52c]:43677) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mgNnU-0006ht-Qp for qemu-devel@nongnu.org; Fri, 29 Oct 2021 05:03:38 -0400 Received: by mail-pg1-x52c.google.com with SMTP id b4so2256878pgh.10 for ; Fri, 29 Oct 2021 02:03:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=wlXrtit4IGqo48Buh8dDpEUHuRV/jAo210kJk8OMXEc=; b=mXU+J0p0xZwYBd0jGhW4iVQBrpURB6S3X5wi8/RqC0wlmK/X08sbIcXb0al7nqtvWC P4E2aRHbfPdGxZsIinN0pKHnM5SYvPF96PbjVlodcdXFg1py5JQRnMo64KVVbA0/1aCD T9EpnDGbUW2fEJE0kGlvyhSur9chLgWIwXim07DTZ9Eii6uovdLbkdtZO/W1Wve4fWDT nME7Eh17vP7gOijh1BV3y0Td+oEjLQHIEKob30wE8pFVM2E5Y3pLWqMDotIs/cB8G06J ZrY+sZ3sBcj3oEhWZgri5K381wJfR6zMqS2dx15Pnp5FHQOiY5jvYVe9Qo6b7rVfUokR 42Kg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=wlXrtit4IGqo48Buh8dDpEUHuRV/jAo210kJk8OMXEc=; b=ho3Uwc6T1E4MJn1BHyqYhRG/mFaQtre7/PCWieVYBQGojrojq2IzxwNwp/FYHMgCxc b2m6rQ1zGz4aJGdv0mUWsAw674pG0SsNsgCdwWXnDe+8TwrACQKcNOxS6A/1EyXGoShV YiLptXhYAickX31/QkPrxcST2zRwRszgCD9UVn8x1XTMCmhinGvYfyvY2GlvmfOaSRov WnHYK/MzRn5MZPGUDsKmS6Ea/fetMP61nlVD5yT7sNSIo8hZCQ1oOS5dRbaRjOHtG2lR Tfn+bqwUSS3chz7Gm5XoC6iWxUPHtP375xYcJYJh6z53IVi3LmN26gsSKUY0GFwSjQLu 0VdA== X-Gm-Message-State: AOAM5305A3xdZ6eAMJbhQz/8zXdE+FVhXKiyMR3gpeW78zZPoR7krfbx C6ROpXoydR0pMrHquKsY1n8sS3esHs4TwWS7 X-Google-Smtp-Source: ABdhPJwiQYgQujxSFde4x4Yp7V+wk123TiU0W9azyCd7VA7r3NCNTRy1aZZWLRsEPXy457aKi1dM6Q== X-Received: by 2002:a05:6a00:10c5:b0:47c:1d9a:c1d with SMTP id d5-20020a056a0010c500b0047c1d9a0c1dmr9552217pfu.75.1635498215432; Fri, 29 Oct 2021 02:03:35 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:46b:ce55:983b:6962:38ac:e1b9]) by smtp.gmail.com with ESMTPSA id t13sm5081477pgn.94.2021.10.29.02.03.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Oct 2021 02:03:35 -0700 (PDT) From: frank.chang@sifive.com To: qemu-devel@nongnu.org Subject: [PATCH v9 63/76] target/riscv: add "set round to odd" rounding mode helper function Date: Fri, 29 Oct 2021 16:59:08 +0800 Message-Id: <20211029085922.255197-64-frank.chang@sifive.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211029085922.255197-1-frank.chang@sifive.com> References: <20211029085922.255197-1-frank.chang@sifive.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::52c; envelope-from=frank.chang@sifive.com; helo=mail-pg1-x52c.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=ham autolearn_force=no X-Spam_action: no action 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: Frank Chang , Alistair Francis , Bin Meng , qemu-riscv@nongnu.org, Palmer Dabbelt Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Frank Chang helper_set_rounding_mode() is responsible for SIGILL, and "round to odd" should be an interface private to translation, so add a new independent helper_set_rod_rounding_mode(). Signed-off-by: Frank Chang Acked-by: Alistair Francis --- target/riscv/fpu_helper.c | 5 +++++ target/riscv/helper.h | 1 + target/riscv/internals.h | 1 + target/riscv/translate.c | 7 +++++++ 4 files changed, 14 insertions(+) diff --git a/target/riscv/fpu_helper.c b/target/riscv/fpu_helper.c index dec39d4a9ed..4a5982d5945 100644 --- a/target/riscv/fpu_helper.c +++ b/target/riscv/fpu_helper.c @@ -81,6 +81,11 @@ void helper_set_rounding_mode(CPURISCVState *env, uint32_t rm) set_float_rounding_mode(softrm, &env->fp_status); } +void helper_set_rod_rounding_mode(CPURISCVState *env) +{ + set_float_rounding_mode(float_round_to_odd, &env->fp_status); +} + static uint64_t do_fmadd_h(CPURISCVState *env, uint64_t rs1, uint64_t rs2, uint64_t rs3, int flags) { diff --git a/target/riscv/helper.h b/target/riscv/helper.h index 53cf88cd402..606bf72d5cb 100644 --- a/target/riscv/helper.h +++ b/target/riscv/helper.h @@ -3,6 +3,7 @@ DEF_HELPER_2(raise_exception, noreturn, env, i32) /* Floating Point - rounding mode */ DEF_HELPER_FLAGS_2(set_rounding_mode, TCG_CALL_NO_WG, void, env, i32) +DEF_HELPER_FLAGS_1(set_rod_rounding_mode, TCG_CALL_NO_WG, void, env) /* Floating Point - fused */ DEF_HELPER_FLAGS_4(fmadd_s, TCG_CALL_NO_RWG, i64, env, i64, i64, i64) diff --git a/target/riscv/internals.h b/target/riscv/internals.h index db105d4d640..065e8162a2f 100644 --- a/target/riscv/internals.h +++ b/target/riscv/internals.h @@ -43,6 +43,7 @@ enum { RISCV_FRM_RUP = 3, /* Round Up */ RISCV_FRM_RMM = 4, /* Round to Nearest, ties to Max Magnitude */ RISCV_FRM_DYN = 7, /* Dynamic rounding mode */ + RISCV_FRM_ROD = 8, /* Round to Odd */ }; static inline uint64_t nanbox_s(float32 f) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 3688e80d03e..b4df21bda3c 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -30,6 +30,7 @@ #include "exec/log.h" #include "instmap.h" +#include "internals.h" /* global register indices */ static TCGv cpu_gpr[32], cpu_pc, cpu_vl; @@ -403,6 +404,12 @@ static void gen_set_rm(DisasContext *ctx, int rm) return; } ctx->frm = rm; + + if (rm == RISCV_FRM_ROD) { + gen_helper_set_rod_rounding_mode(cpu_env); + return; + } + gen_helper_set_rounding_mode(cpu_env, tcg_constant_i32(rm)); }