From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8401C4363D for ; Fri, 25 Sep 2020 15:33:48 +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 6D55420878 for ; Fri, 25 Sep 2020 15:33:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="P48Mm0V5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6D55420878 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:32878 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLpjH-0004RC-Jz for qemu-devel@archiver.kernel.org; Fri, 25 Sep 2020 11:33:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59914) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLpX6-0001Cu-U9 for qemu-devel@nongnu.org; Fri, 25 Sep 2020 11:21:14 -0400 Received: from mail-pg1-x543.google.com ([2607:f8b0:4864:20::543]:46808) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kLpX2-0005Rz-Rw for qemu-devel@nongnu.org; Fri, 25 Sep 2020 11:21:12 -0400 Received: by mail-pg1-x543.google.com with SMTP id 34so2840786pgo.13 for ; Fri, 25 Sep 2020 08:21:03 -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=zr2QWZIaQ416tfvMuGmnFuEpgzcclZDiNIL1w+CaZnM=; b=P48Mm0V5ZXsyDICfr03qRnpHI2cflgPzbD+s83vBKG6aARRuGWJxDqHo3udWU4hl/j oyxYyxaVVGBlE1ySztLuJi4f1+eZNEddyYDTXv49z5W2UH/hKtyQRR9TSsA5dDpYFrVH U30MZXBo38S477lMCwnA1ePeVTHw4rzXgiwqBbFxFZZlwTeRscKJUGgxCffs8S2GQfMy /+82lRIbyJrrQdJMEHRX+ZlY0wtod5ez1/m74x+lQvP+PqSq4z39H5EwrvbqQynY0cmd sE3R+HiTFEz3ddjYYGJB1HT7gHWnGwDLVjnqrpMv6Klv9+jCzhVp0P+7slgFMG5uXcCG HYJg== 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=zr2QWZIaQ416tfvMuGmnFuEpgzcclZDiNIL1w+CaZnM=; b=enoK4yPwGl65bnujx6uGmy90kCxhrm9kkPx1lnFq3r1D7SsuWeU+ycTN8XNMvRph1Q hNt9zwq3AEo/a3Gic2R61AbEW0SvN7CAdSsfPDmObxVr4IrObKH6R0xoohmePv3M1M5g DD9VA0TBYwEC7CiIGhCYS/pxCJm8dcUMPJRc2AAIQfTBw177ypLmcthDTZHkCahxxK4y jDacdyjDZcIeKN1ULVhWgSG8TRPCIK7twEgLztuVTKp/RsJ2/wDaG9XpEACw5634N0mz plRi8pj04ogpsFxRJOz4UCJGHOS7hOLACsjABURL33cLkC1X4uTmXOOG7Pj2hww9Qs38 w9dA== X-Gm-Message-State: AOAM5302DMOgYFWoDHtb8VuPNhMPcbwy35LsmSSGkB+WW+e3DKtlDuw3 EbaUbJrNUVVD80FCpRKZWj2gFGhUTcoBjw== X-Google-Smtp-Source: ABdhPJwdAQXPL872sdEPiy5IQ3upfPMUvoXdE5S0t5BTBhFxgKyrLFnFliKgqkE0uFd40kvPqqj1dA== X-Received: by 2002:a17:902:b702:b029:d1:e598:4014 with SMTP id d2-20020a170902b702b02900d1e5984014mr5129473pls.78.1601047261839; Fri, 25 Sep 2020 08:21:01 -0700 (PDT) Received: from localhost.localdomain ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id a5sm2717859pgk.13.2020.09.25.08.21.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2020 08:21:01 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 09/10] softfloat: Use aarch64 assembly for {add, sub}{192, 256} Date: Fri, 25 Sep 2020 08:20:46 -0700 Message-Id: <20200925152047.709901-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200925152047.709901-1-richard.henderson@linaro.org> References: <20200925152047.709901-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::543; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x543.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: bharata@linux.ibm.com, alex.bennee@linaro.org, david@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The compiler cannot chain more than two additions together. Use inline assembly for 3 or 4 additions. Signed-off-by: Richard Henderson --- include/fpu/softfloat-macros.h | 14 ++++++++++++++ fpu/softfloat.c | 27 +++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/include/fpu/softfloat-macros.h b/include/fpu/softfloat-macros.h index 99fa124e56..969a486fd2 100644 --- a/include/fpu/softfloat-macros.h +++ b/include/fpu/softfloat-macros.h @@ -442,6 +442,13 @@ static inline void "adc %3, %0" : "=&r"(*z0Ptr), "=&r"(*z1Ptr), "=&r"(*z2Ptr) : "rm"(b0), "rm"(b1), "rm"(b2), "0"(a0), "1"(a1), "2"(a2)); +#elif defined(__aarch64__) + asm("adds %2, %x5, %x8\n\t" + "adcs %1, %x4, %x7\n\t" + "adc %0, %x3, %x6" + : "=&r"(*z0Ptr), "=&r"(*z1Ptr), "=&r"(*z2Ptr) + : "rZ"(a0), "rZ"(a1), "rZ"(a2), "rZ"(b0), "rZ"(b1), "rZ"(b2) + : "cc"); #else uint64_t z0, z1, z2; int8_t carry0, carry1; @@ -507,6 +514,13 @@ static inline void "sbb %3, %0" : "=&r"(*z0Ptr), "=&r"(*z1Ptr), "=&r"(*z2Ptr) : "rm"(b0), "rm"(b1), "rm"(b2), "0"(a0), "1"(a1), "2"(a2)); +#elif defined(__aarch64__) + asm("subs %2, %x5, %x8\n\t" + "sbcs %1, %x4, %x7\n\t" + "sbc %0, %x3, %x6" + : "=&r"(*z0Ptr), "=&r"(*z1Ptr), "=&r"(*z2Ptr) + : "rZ"(a0), "rZ"(a1), "rZ"(a2), "rZ"(b0), "rZ"(b1), "rZ"(b2) + : "cc"); #else uint64_t z0, z1, z2; int8_t borrow0, borrow1; diff --git a/fpu/softfloat.c b/fpu/softfloat.c index fdf5bde69e..07dc17caad 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -7358,6 +7358,18 @@ static void sub256(UInt256 *r, UInt256 *a, UInt256 *b) : "=&r"(r->w[0]), "=&r"(r->w[1]), "=&r"(r->w[2]), "=&r"(r->w[3]) : "rme"(b->w[0]), "rme"(b->w[1]), "rme"(b->w[2]), "rme"(b->w[3]), "0"(a->w[0]), "1"(a->w[1]), "2"(a->w[2]), "3"(a->w[3])); +#elif defined(__aarch64__) + asm("subs %[r3], %x[a3], %x[b3]\n\t" + "sbcs %[r2], %x[a2], %x[b2]\n\t" + "sbcs %[r1], %x[a1], %x[b1]\n\t" + "sbc %[r0], %x[a0], %x[b0]" + : [r0] "=&r"(r->w[0]), [r1] "=&r"(r->w[1]), + [r2] "=&r"(r->w[2]), [r3] "=&r"(r->w[3]) + : [a0] "rZ"(a->w[0]), [a1] "rZ"(a->w[1]), + [a2] "rZ"(a->w[2]), [a3] "rZ"(a->w[3]), + [b0] "rZ"(b->w[0]), [b1] "rZ"(b->w[1]), + [b2] "rZ"(b->w[2]), [b3] "rZ"(b->w[3]) + : "cc"); #else bool borrow = false; @@ -7388,6 +7400,13 @@ static void neg256(UInt256 *a) : "=&r"(a->w[0]), "=&r"(a->w[1]), "=&r"(a->w[2]), "+rm"(a->w[3]) : "rme"(a->w[0]), "rme"(a->w[1]), "rme"(a->w[2]), "0"(0), "1"(0), "2"(0)); +#elif defined(__aarch64__) + asm("negs %3, %3\n\t" + "ngcs %2, %2\n\t" + "ngcs %1, %1\n\t" + "ngc %0, %0" + : "+r"(a->w[0]), "+r"(a->w[1]), "+r"(a->w[2]), "+r"(a->w[3]) + : : "cc"); #else /* * Recall that -X - 1 = ~X, and that since this is negation, @@ -7430,6 +7449,14 @@ static void add256(UInt256 *a, UInt256 *b) "adc %4, %0" : "+r"(a->w[0]), "+r"(a->w[1]), "+r"(a->w[2]), "+r"(a->w[3]) : "rme"(b->w[0]), "rme"(b->w[1]), "rme"(b->w[2]), "rme"(b->w[3])); +#elif defined(__aarch64__) + asm("adds %3, %3, %x7\n\t" + "adcs %2, %2, %x6\n\t" + "adcs %1, %1, %x5\n\t" + "adc %0, %0, %x4" + : "+r"(a->w[0]), "+r"(a->w[1]), "+r"(a->w[2]), "+r"(a->w[3]) + : "rZ"(b->w[0]), "rZ"(b->w[1]), "rZ"(b->w[2]), "rZ"(b->w[3]) + : "cc"); #else bool carry = false; -- 2.25.1