From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1944) id 057763860001; Wed, 14 Feb 2024 15:36:58 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 057763860001 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1707925019; bh=nR/4gS6681LD48uIXY2impkoIxgOqswBx3fls3p1v88=; h=From:To:Subject:Date:From; b=dGOMQ1N2TYYHBEsefq0NlzaFNUCRcp+zUmD+r6Zw1hiRL3MEHdXFyiwFhv1NAo1+V kK/KLuEL02auzsg4MMsCmEXO+w21fiMd0wUUnxlKOQn8DWAOmeFIJhoAsWzD9FqMP4 P1GXmUtf4QJP+temMO+BZEosdymZXm7X+uDjhdJ4= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Szabolcs Nagy To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/vendors/ARM/heads/gcs-13)] aarch64: Add support for chkfeat insn X-Act-Checkin: gcc X-Git-Author: Szabolcs Nagy X-Git-Refname: refs/vendors/ARM/heads/gcs-13 X-Git-Oldrev: 2812fe42dc5dbfd06d8605854e2841a7ebec978f X-Git-Newrev: 3f9cbc30f61e8708ad8e691934a9f978af837501 Message-Id: <20240214153659.057763860001@sourceware.org> Date: Wed, 14 Feb 2024 15:36:58 +0000 (GMT) List-Id: https://gcc.gnu.org/g:3f9cbc30f61e8708ad8e691934a9f978af837501 commit 3f9cbc30f61e8708ad8e691934a9f978af837501 Author: Szabolcs Nagy Date: Tue May 9 15:37:49 2023 +0100 aarch64: Add support for chkfeat insn This is a hint space instruction to check for enabled HW features and update the x16 register accordingly. Use unspec_volatile to prevent reordering it around calls since calls can enable or disable HW features. gcc/ChangeLog: * config/aarch64/aarch64.md (aarch64_chkfeat): New. Diff: --- gcc/config/aarch64/aarch64.md | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index d0b9f1ced7e8..de7481bd3c72 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -319,6 +319,7 @@ UNSPECV_BTI_C ; Represent BTI c. UNSPECV_BTI_J ; Represent BTI j. UNSPECV_BTI_JC ; Represent BTI jc. + UNSPECV_CHKFEAT ; Represent CHKFEAT X16. UNSPECV_TSTART ; Represent transaction start. UNSPECV_TCOMMIT ; Represent transaction commit. UNSPECV_TCANCEL ; Represent transaction cancel. @@ -7897,6 +7898,14 @@ [(set (attr "length") (symbol_ref "INTVAL (operands[0])"))] ) +;; CHKFEAT instruction +(define_insn "aarch64_chkfeat" + [(set (reg:DI R16_REGNUM) + (unspec_volatile:DI [(reg:DI R16_REGNUM)] UNSPECV_CHKFEAT))] + "" + "hint\\t40 // chkfeat x16" +) + ;; AdvSIMD Stuff (include "aarch64-simd.md")