From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1005) id BF5E138A909F; Tue, 15 Nov 2022 18:54:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BF5E138A909F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668538499; bh=Hyefq2Cp+Ron7lNQ77U7NUB0gVGcbnEFkMGxSYf6llY=; h=From:To:Subject:Date:From; b=EKmyziyXgNX2MkXPTBhCyVfUrOoxYfmdc7JzY/zGNaeUc21vi706nRyMt4zJAQsSX y4by4v7pnpTfFsQCh1yLPpTgJqnMcrCQpJqkoCvuGx6p8GUTCjOgnUONFCvBeI7fYN XNBM+HuOLjs2VvnmZ/mIccAwx45tfwiBYAumPAlo= 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: 646e2e9bb56adf101680da2b13f9dd6e2d46d75b X-Git-Newrev: cf83c4f88df6149adbd23dd1e80c5ec328ab7afb Message-Id: <20221115185459.BF5E138A909F@sourceware.org> Date: Tue, 15 Nov 2022 18:54:59 +0000 (GMT) List-Id: https://gcc.gnu.org/g:cf83c4f88df6149adbd23dd1e80c5ec328ab7afb commit cf83c4f88df6149adbd23dd1e80c5ec328ab7afb 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.