From patchwork Thu Nov 12 23:01:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Giuseppe Musacchio X-Patchwork-Id: 11902225 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A72B914C0 for ; Thu, 12 Nov 2020 23:04:56 +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 618E620A8B for ; Thu, 12 Nov 2020 23:04:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QzYNHWLv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 618E620A8B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:60346 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kdLeB-00064r-D4 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Nov 2020 18:04:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50338) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kdLbC-0002Ax-K4; Thu, 12 Nov 2020 18:01:50 -0500 Received: from mail-wr1-x444.google.com ([2a00:1450:4864:20::444]:44494) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kdLbA-0004x2-73; Thu, 12 Nov 2020 18:01:50 -0500 Received: by mail-wr1-x444.google.com with SMTP id c17so7683752wrc.11; Thu, 12 Nov 2020 15:01:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WTFm5JfSzDYnQKGitu1S7GuUWTQh3inoTWd2aXww1qg=; b=QzYNHWLv59omWfktbnPyGt1Pu6k/UVqNCqLZfAtTAzZ7bm65Y6jpx/dE/xOKXZT4KT y1fbHZV9YpZpo4HtV4tYC5F78MGVuoHZBkrzRF5jm+u5Wjz3bEdiSg5Vul8jbYmPIl+/ eJjoePi3kKnm4XOwUttSx9hc1x3MycekUlA5WbWjdy16uu+vdl5mEefRKAQmh5O1bQaA XyXfU6FLjtiJx7xyA+jcKyOd8AYHcYh3FjpKO4iLfzrRdCjPbG9fb5jIkyaOUzK4SrtC fvtKO17DzXKF26kqqAtR4jGvhR/OeekqDKlPi08EYbin1hMbk3CD9wZ5Z/atwuRb2PSn kyzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WTFm5JfSzDYnQKGitu1S7GuUWTQh3inoTWd2aXww1qg=; b=NEx1cEjttERgalMpaZdMV89vrh/ajnwCK5koGvXJQ+Pw+4Qevr9f9JfZ9Fm6RGlMAD CB8eQBg/3eLsa/KhGXVgKAFn5kaC2lYwz/MvNH5s4wjV2AmUZFCplBnFpFNevhb5nqp7 wziQDs/2LxhqK880di7ajDQJkzJ6rsTQ4FG8my2yt2DQZifwxFnCseYsLz8sfJokJ9DT o8Zggvgc/dgLuXlnGp5mrl/O8wVhCJ3sfBwLGChRv+TDnv7HYEe0n33TknbrXNcXK64r BydoHxa5j1C3YEmXAc2T/VQ2eKRAVQwbBkf4EY3mgwJNnMhauGvJ0F7SAWOisjLET3Ba vRXw== X-Gm-Message-State: AOAM530CTKqp9Soxsib6B8Xm/8txbP/paiLEHTpFJjKLxRqDejbpqlzw TEreVQdEIGUR0OyfyGQKqrvSF3R76mLqwQ== X-Google-Smtp-Source: ABdhPJwJRkh5I786ZyNJxeCwoIAgRuF+Rk4I7AT4dhK3hDv56EbnNm4x3EYmw2wSBxwTVq803t6AGg== X-Received: by 2002:adf:ea50:: with SMTP id j16mr2099391wrn.283.1605222100566; Thu, 12 Nov 2020 15:01:40 -0800 (PST) Received: from localhost.localdomain ([151.33.227.77]) by smtp.gmail.com with ESMTPSA id v16sm8326184wml.33.2020.11.12.15.01.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Nov 2020 15:01:40 -0800 (PST) From: LemonBoy To: qemu-devel@nongnu.org Subject: [PATCH v3 3/4] ppc/translate: Delay NaN checking after comparison Date: Fri, 13 Nov 2020 00:01:29 +0100 Message-Id: <20201112230130.65262-4-thatlemon@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201112230130.65262-1-thatlemon@gmail.com> References: <20201112230130.65262-1-thatlemon@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::444; envelope-from=thatlemon@gmail.com; helo=mail-wr1-x444.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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, FREEMAIL_FROM=0.001, 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: LemonBoy , richard.henderson@linaro.org, qemu-ppc@nongnu.org, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Since we always perform a comparison between the two operands avoid checking for NaN unless the result states they're unordered. Suggested-by: Richard Henderson Signed-off-by: Giuseppe Musacchio Reviewed-by: Richard Henderson --- target/ppc/fpu_helper.c | 80 +++++++++++++++++++++-------------------- 1 file changed, 42 insertions(+), 38 deletions(-) diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c index 6600520221..08fcaed723 100644 --- a/target/ppc/fpu_helper.c +++ b/target/ppc/fpu_helper.c @@ -2475,25 +2475,6 @@ static inline void do_scalar_cmp(CPUPPCState *env, ppc_vsr_t *xa, ppc_vsr_t *xb, helper_reset_fpstatus(env); - if (float64_is_signaling_nan(xa->VsrD(0), &env->fp_status) || - float64_is_signaling_nan(xb->VsrD(0), &env->fp_status)) { - vxsnan_flag = true; - if (fpscr_ve == 0 && ordered) { - vxvc_flag = true; - } - } else if (float64_is_quiet_nan(xa->VsrD(0), &env->fp_status) || - float64_is_quiet_nan(xb->VsrD(0), &env->fp_status)) { - if (ordered) { - vxvc_flag = true; - } - } - if (vxsnan_flag) { - float_invalid_op_vxsnan(env, GETPC()); - } - if (vxvc_flag) { - float_invalid_op_vxvc(env, 0, GETPC()); - } - switch (float64_compare(xa->VsrD(0), xb->VsrD(0), &env->fp_status)) { case float_relation_less: cc = CRF_LT; @@ -2506,6 +2487,27 @@ static inline void do_scalar_cmp(CPUPPCState *env, ppc_vsr_t *xa, ppc_vsr_t *xb, break; case float_relation_unordered: cc = CRF_SO; + + if (float64_is_signaling_nan(xa->VsrD(0), &env->fp_status) || + float64_is_signaling_nan(xb->VsrD(0), &env->fp_status)) { + vxsnan_flag = true; + if (fpscr_ve == 0 && ordered) { + vxvc_flag = true; + } + } else if (float64_is_quiet_nan(xa->VsrD(0), &env->fp_status) || + float64_is_quiet_nan(xb->VsrD(0), &env->fp_status)) { + if (ordered) { + vxvc_flag = true; + } + } + + if (vxsnan_flag) { + float_invalid_op_vxsnan(env, GETPC()); + } + if (vxvc_flag) { + float_invalid_op_vxvc(env, 0, GETPC()); + } + break; default: g_assert_not_reached(); @@ -2538,25 +2540,6 @@ static inline void do_scalar_cmpq(CPUPPCState *env, ppc_vsr_t *xa, helper_reset_fpstatus(env); - if (float128_is_signaling_nan(xa->f128, &env->fp_status) || - float128_is_signaling_nan(xb->f128, &env->fp_status)) { - vxsnan_flag = true; - if (fpscr_ve == 0 && ordered) { - vxvc_flag = true; - } - } else if (float128_is_quiet_nan(xa->f128, &env->fp_status) || - float128_is_quiet_nan(xb->f128, &env->fp_status)) { - if (ordered) { - vxvc_flag = true; - } - } - if (vxsnan_flag) { - float_invalid_op_vxsnan(env, GETPC()); - } - if (vxvc_flag) { - float_invalid_op_vxvc(env, 0, GETPC()); - } - switch (float128_compare(xa->f128, xb->f128, &env->fp_status)) { case float_relation_less: cc = CRF_LT; @@ -2569,6 +2552,27 @@ static inline void do_scalar_cmpq(CPUPPCState *env, ppc_vsr_t *xa, break; case float_relation_unordered: cc = CRF_SO; + + if (float128_is_signaling_nan(xa->f128, &env->fp_status) || + float128_is_signaling_nan(xb->f128, &env->fp_status)) { + vxsnan_flag = true; + if (fpscr_ve == 0 && ordered) { + vxvc_flag = true; + } + } else if (float128_is_quiet_nan(xa->f128, &env->fp_status) || + float128_is_quiet_nan(xb->f128, &env->fp_status)) { + if (ordered) { + vxvc_flag = true; + } + } + + if (vxsnan_flag) { + float_invalid_op_vxsnan(env, GETPC()); + } + if (vxvc_flag) { + float_invalid_op_vxvc(env, 0, GETPC()); + } + break; default: g_assert_not_reached();