From patchwork Wed Oct 21 04:51:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1385329 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=XXVdG05Y; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4CGJ8M3WL8z9sPB for ; Wed, 21 Oct 2020 15:55:15 +1100 (AEDT) Received: from localhost ([::1]:38054 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kV69Z-0003nH-E8 for incoming@patchwork.ozlabs.org; Wed, 21 Oct 2020 00:55:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57540) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kV66V-0000SC-0c for qemu-devel@nongnu.org; Wed, 21 Oct 2020 00:52:03 -0400 Received: from mail-pj1-x1044.google.com ([2607:f8b0:4864:20::1044]:52192) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kV66T-0005h8-6m for qemu-devel@nongnu.org; Wed, 21 Oct 2020 00:52:02 -0400 Received: by mail-pj1-x1044.google.com with SMTP id a17so519297pju.1 for ; Tue, 20 Oct 2020 21:52:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=vw1fpXxTPO16yzgwqOIWW38UgkU5WY9AeukvYjNGLyM=; b=XXVdG05YrAHAL8Kb+NXJvdEPFZbftuzEdprKf7UVzAVuF++sAhs57QlyAWUjX5fUF7 C7BcXncs2Hf1q8C8Fzb7CXiQQTxJIxeHYCaw2ONSWBbfPPU2AaWi51fYUOhsdtmZkq8b VXzypYMUL80QbAkeRg8mD1zkrgf/Lz9HNbiUfRX7VNC4T1OExkFkJz7K9rzjdlJoTNo8 3amryEosk/fQy+ePsVtNgdXs9Bs2O3QiuDF99Ze3PYT89iovoO8wATQnwBgyie01lRtG UI4GGCpj+ZKSDnrKdzoQdH+5ukjP+mxPMnlk5lwCEH7YxwVIG8MkHGrASUym1PF+nNgu wzEw== 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=vw1fpXxTPO16yzgwqOIWW38UgkU5WY9AeukvYjNGLyM=; b=rPzSGT5Q4E6xqo5WwuIx9Pn87Nu8nmLNCRtKUO5gogPHmzSSY3BtBq68Jq9kpLEP6C s0ViOtQ7t0O1JHfGam80cyA5PMkK1dJbdiBSgS+P7gifhoI2jYheAmwLhXCuShAcBQLh gIhH5U81BgA52Fn6ShXsDiYG4t39kwsdytkm+jykOSzGOHOSMxozZXWRoLDTjjP8CF7C JOzhUP8YuMHX1V2ql89X/1Klag/U6/3by99OwX8sGJaQ9W/j9U3E4ctLBsKzxfyOKbLz 95LhKpMBHi1SHbMtLYH/kVA8evj3QIHQALeKbZRIsqKNYAIgGhovPQUunjajDGy4eo5z /fUQ== X-Gm-Message-State: AOAM5308Tiq5H1m91T9TpIkX5VfOdjxn4rn9uC5X+fIp0alsGz32lWPf /4Lrk51PCSoFJjg8GNkg7hWlXui6y1dnkw== X-Google-Smtp-Source: ABdhPJzgNMLtCfE2wDiDc7atddrfiKsab9k0Wq5JmiYp+9/XHMN6PflPoqABQ/nE84oiURg3f8yE7A== X-Received: by 2002:a17:90a:9504:: with SMTP id t4mr1548903pjo.82.1603255919475; Tue, 20 Oct 2020 21:51:59 -0700 (PDT) Received: from localhost.localdomain ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id j11sm620070pfh.143.2020.10.20.21.51.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Oct 2020 21:51:58 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [RFC PATCH 06/15] softfloat: Use mulu64 for mul64To128 Date: Tue, 20 Oct 2020 21:51:40 -0700 Message-Id: <20201021045149.1582203-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201021045149.1582203-1-richard.henderson@linaro.org> References: <20201021045149.1582203-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1044; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1044.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, 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: alex.bennee@linaro.org, David Hildenbrand Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Via host-utils.h, we use a host widening multiply for 64-bit hosts, and a common subroutine for 32-bit hosts. Reviewed-by: Alex Bennée Reviewed-by: David Hildenbrand Signed-off-by: Richard Henderson --- include/fpu/softfloat-macros.h | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/include/fpu/softfloat-macros.h b/include/fpu/softfloat-macros.h index a35ec2893a..57845f8af0 100644 --- a/include/fpu/softfloat-macros.h +++ b/include/fpu/softfloat-macros.h @@ -83,6 +83,7 @@ this code that are retained. #define FPU_SOFTFLOAT_MACROS_H #include "fpu/softfloat-types.h" +#include "qemu/host-utils.h" /*---------------------------------------------------------------------------- | Shifts `a' right by the number of bits given in `count'. If any nonzero @@ -515,27 +516,10 @@ static inline void | `z0Ptr' and `z1Ptr'. *----------------------------------------------------------------------------*/ -static inline void mul64To128( uint64_t a, uint64_t b, uint64_t *z0Ptr, uint64_t *z1Ptr ) +static inline void +mul64To128(uint64_t a, uint64_t b, uint64_t *z0Ptr, uint64_t *z1Ptr) { - uint32_t aHigh, aLow, bHigh, bLow; - uint64_t z0, zMiddleA, zMiddleB, z1; - - aLow = a; - aHigh = a>>32; - bLow = b; - bHigh = b>>32; - z1 = ( (uint64_t) aLow ) * bLow; - zMiddleA = ( (uint64_t) aLow ) * bHigh; - zMiddleB = ( (uint64_t) aHigh ) * bLow; - z0 = ( (uint64_t) aHigh ) * bHigh; - zMiddleA += zMiddleB; - z0 += ( ( (uint64_t) ( zMiddleA < zMiddleB ) )<<32 ) + ( zMiddleA>>32 ); - zMiddleA <<= 32; - z1 += zMiddleA; - z0 += ( z1 < zMiddleA ); - *z1Ptr = z1; - *z0Ptr = z0; - + mulu64(z1Ptr, z0Ptr, a, b); } /*----------------------------------------------------------------------------