From patchwork Wed Mar 19 19:29:54 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bill Schmidt X-Patchwork-Id: 331839 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 438052C00A2 for ; Thu, 20 Mar 2014 06:29:59 +1100 (EST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender :message-id:subject:from:to:cc:date:content-type :content-transfer-encoding:mime-version; q=dns; s=default; b=wdl wQgng779e1B9/ZKE1HIMdIKAlqJ5ScQ0nyD5HBXcAPpRJKZWSVIHhj/NgOr/B8es 59qBM3zhEWtvDgHCYve3xKcwY1NsNaPz8/5C1N8CG5v7b9/NX31+uvsccJR78k/s vthFYMl1FrYinfR6+7fh1DBw+CxnFHLhS8DfZrN8= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender :message-id:subject:from:to:cc:date:content-type :content-transfer-encoding:mime-version; s=default; bh=aWgpTZZyB hbR1JUN6THK5YZzVfU=; b=rlSHZJeEFUYkXbJxZQB2n6VOoVjiXQBzUXhJcMm16 DHqJVq5NNnBRJNLI6EOYebIdEglWOFyjfL1cSqfsrw9ARMYUhcvTvPbDmrBo7TQ3 0ytcbb6zXRR/o95JmQ5EvB/cHyF9g2gQ84oBYEHdL5I1EPgDQCGt1BhFPRmYpAoc bY= Received: (qmail 15903 invoked by alias); 19 Mar 2014 19:29:52 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 15893 invoked by uid 89); 19 Mar 2014 19:29:51 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.3 required=5.0 tests=AWL, BAYES_00, T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: e28smtp03.in.ibm.com Received: from e28smtp03.in.ibm.com (HELO e28smtp03.in.ibm.com) (122.248.162.3) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-SHA encrypted) ESMTPS; Wed, 19 Mar 2014 19:29:49 +0000 Received: from /spool/local by e28smtp03.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 20 Mar 2014 00:59:44 +0530 Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 3FAC2E003F for ; Thu, 20 Mar 2014 01:03:37 +0530 (IST) Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay02.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s2JJTcfn3867092 for ; Thu, 20 Mar 2014 00:59:38 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s2JJTh2L015969 for ; Thu, 20 Mar 2014 00:59:43 +0530 Received: from [9.50.16.86] (dyn9050016086.mts.ibm.com [9.50.16.86] (may be forged)) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id s2JJTf5j015887; Thu, 20 Mar 2014 00:59:42 +0530 Message-ID: <1395257394.17148.8.camel@gnopaine> Subject: [4.8, PATCH 6/26] Backport Power8 and LE support: TDmode for LE From: Bill Schmidt To: gcc-patches@gcc.gnu.org Cc: dje.gcc@gmail.com Date: Wed, 19 Mar 2014 14:29:54 -0500 Mime-Version: 1.0 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14031919-3864-0000-0000-00000D10822D X-IsSubscribed: yes Hi, This patch (diff-le-dfp) backports fixes for TDmode on a little endian target. Thanks, Bill 2014-03-19 Bill Schmidt Backport from mainline r205123: 2013-11-20 Ulrich Weigand * config/rs6000/rs6000.c (rs6000_cannot_change_mode_class): Do not allow subregs of TDmode in FPRs of smaller size in little-endian. (rs6000_split_multireg_move): When splitting an access to TDmode in FPRs, do not use simplify_gen_subreg. Backport from mainline r204927: 2013-11-17 Ulrich Weigand * config/rs6000/rs6000.c (rs6000_emit_move): Use low word of sdmode_stack_slot also in little-endian mode. Index: gcc-4_8-test/gcc/config/rs6000/rs6000.c =================================================================== --- gcc-4_8-test.orig/gcc/config/rs6000/rs6000.c +++ gcc-4_8-test/gcc/config/rs6000/rs6000.c @@ -7963,7 +7963,9 @@ rs6000_emit_move (rtx dest, rtx source, } else if (INT_REGNO_P (REGNO (operands[1]))) { - rtx mem = adjust_address_nv (operands[0], mode, 4); + rtx mem = operands[0]; + if (BYTES_BIG_ENDIAN) + mem = adjust_address_nv (mem, mode, 4); mem = eliminate_regs (mem, VOIDmode, NULL_RTX); emit_insn (gen_movsd_hardfloat (mem, operands[1])); } @@ -7986,7 +7988,9 @@ rs6000_emit_move (rtx dest, rtx source, } else if (INT_REGNO_P (REGNO (operands[0]))) { - rtx mem = adjust_address_nv (operands[1], mode, 4); + rtx mem = operands[1]; + if (BYTES_BIG_ENDIAN) + mem = adjust_address_nv (mem, mode, 4); mem = eliminate_regs (mem, VOIDmode, NULL_RTX); emit_insn (gen_movsd_hardfloat (operands[0], mem)); } @@ -16082,6 +16086,13 @@ rs6000_cannot_change_mode_class (enum ma if (TARGET_IEEEQUAD && (to == TFmode || from == TFmode)) return true; + /* TDmode in floating-mode registers must always go into a register + pair with the most significant word in the even-numbered register + to match ISA requirements. In little-endian mode, this does not + match subreg numbering, so we cannot allow subregs. */ + if (!BYTES_BIG_ENDIAN && (to == TDmode || from == TDmode)) + return true; + if (from_size < 8 || to_size < 8) return true; @@ -19028,6 +19039,39 @@ rs6000_split_multireg_move (rtx dst, rtx gcc_assert (reg_mode_size * nregs == GET_MODE_SIZE (mode)); + /* TDmode residing in FP registers is special, since the ISA requires that + the lower-numbered word of a register pair is always the most significant + word, even in little-endian mode. This does not match the usual subreg + semantics, so we cannnot use simplify_gen_subreg in those cases. Access + the appropriate constituent registers "by hand" in little-endian mode. + + Note we do not need to check for destructive overlap here since TDmode + can only reside in even/odd register pairs. */ + if (FP_REGNO_P (reg) && DECIMAL_FLOAT_MODE_P (mode) && !BYTES_BIG_ENDIAN) + { + rtx p_src, p_dst; + int i; + + for (i = 0; i < nregs; i++) + { + if (REG_P (src) && FP_REGNO_P (REGNO (src))) + p_src = gen_rtx_REG (reg_mode, REGNO (src) + nregs - 1 - i); + else + p_src = simplify_gen_subreg (reg_mode, src, mode, + i * reg_mode_size); + + if (REG_P (dst) && FP_REGNO_P (REGNO (dst))) + p_dst = gen_rtx_REG (reg_mode, REGNO (dst) + nregs - 1 - i); + else + p_dst = simplify_gen_subreg (reg_mode, dst, mode, + i * reg_mode_size); + + emit_insn (gen_rtx_SET (VOIDmode, p_dst, p_src)); + } + + return; + } + if (REG_P (src) && REG_P (dst) && (REGNO (src) < REGNO (dst))) { /* Move register range backwards, if we might have destructive