From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1005) id 6B4EF385223F; Thu, 17 Nov 2022 21:54:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6B4EF385223F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668722090; bh=mX95SLmHBDj1LNiKxlXqjqxbSHfhRsboPOY3Gy4VPs8=; h=From:To:Subject:Date:From; b=Sar6CtAOCG+qqbGkYItzwvrwzTG9DyIRaPVf6Lq0lW/lD98NGEkM32je3FVV7RDIM DAhIaoLw3XhgvC45E5w1C95iiMNBa7DO2kCiL2WFd5xd6msXClFvoYwAfWcdAEUzuz ZVDplF/KbYt92pvF0RQKSfODCs8Q+mgjDJl5WHzg= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Michael Meissner To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/meissner/heads/dmf004)] Add parameter for memcpy inline code moves X-Act-Checkin: gcc X-Git-Author: Michael Meissner X-Git-Refname: refs/users/meissner/heads/dmf004 X-Git-Oldrev: b71fb0208a4535709c1621b0e4780ffc3919203d X-Git-Newrev: 92f5b212e8b335680dddc344a563f4f973389f01 Message-Id: <20221117215450.6B4EF385223F@sourceware.org> Date: Thu, 17 Nov 2022 21:54:50 +0000 (GMT) List-Id: https://gcc.gnu.org/g:92f5b212e8b335680dddc344a563f4f973389f01 commit 92f5b212e8b335680dddc344a563f4f973389f01 Author: Michael Meissner Date: Tue Nov 15 13:54:16 2022 -0500 Add parameter for memcpy inline code moves 2022-11-15 Michael Meissner gcc/ * config/rs6000/rs6000.opt (rs6000-memcpy-inline-bytes): New parameter, set to 0. * config/rs6000/rs6000-string.cc (expand_block_move): Only do optimization if rs6000-memcpy-inline-bytes <= 16. Diff: --- gcc/config/rs6000/rs6000-string.cc | 6 ++++-- gcc/config/rs6000/rs6000.opt | 5 +++++ 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/gcc/config/rs6000/rs6000-string.cc b/gcc/config/rs6000/rs6000-string.cc index 2468e375781..243be4f396d 100644 --- a/gcc/config/rs6000/rs6000-string.cc +++ b/gcc/config/rs6000/rs6000-string.cc @@ -2766,7 +2766,9 @@ expand_block_move (rtx operands[], bool might_overlap) if (! constp) { if (TARGET_BLOCK_OPS_UNALIGNED_VSX && TARGET_P9_VECTOR && TARGET_64BIT - && !optimize_size) + && rs6000_memcpy_inline_bytes > 0 + && rs6000_memcpy_inline_bytes <= GET_MODE_SIZE (V16QImode) + && optimize && !optimize_size) { rtx join_label = gen_label_rtx (); rtx inline_label = gen_label_rtx (); @@ -2779,7 +2781,7 @@ expand_block_move (rtx operands[], bool might_overlap) : convert_to_mode (Pmode, bytes_rtx, true)); rtx cr = gen_reg_rtx (CCUNSmode); - rtx max_size = GEN_INT (16); + rtx max_size = GEN_INT (rs6000_memcpy_inline_bytes); emit_insn (gen_rtx_SET (cr, gen_rtx_COMPARE (CCUNSmode, bytes_rtx, max_size))); diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt index 6872d359952..90dc91a277f 100644 --- a/gcc/config/rs6000/rs6000.opt +++ b/gcc/config/rs6000/rs6000.opt @@ -687,3 +687,8 @@ default value is 4. Target Undocumented Joined UInteger Var(rs6000_vect_unroll_reduc_threshold) Init(1) Param When reduction factor computed for a loop exceeds the threshold specified by this parameter, prefer to unroll this loop. The default value is 1. + +-param=rs6000-memcpy-inline-bytes= +Target Undocumented Joined UInteger Var(rs6000_memcpy_inline_bytes) Init(0) Param +Maximum number of bytes to move with inline code before calling the memcpy +library function. The default value is 0.