From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id BA4E846464 for ; Thu, 16 Nov 2023 16:05:01 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 58BB668CD35; Thu, 16 Nov 2023 18:04:58 +0200 (EET) Received: from ursule.remlab.net (vps-a2bccee9.vps.ovh.net [51.75.19.47]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 43C3668CBD4 for ; Thu, 16 Nov 2023 18:04:52 +0200 (EET) Received: from basile.remlab.net (localhost [IPv6:::1]) by ursule.remlab.net (Postfix) with ESMTP id AD374C0170 for ; Thu, 16 Nov 2023 18:04:51 +0200 (EET) From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= To: ffmpeg-devel@ffmpeg.org Date: Thu, 16 Nov 2023 18:04:51 +0200 Message-ID: <20231116160451.37296-1-remi@remlab.net> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] checkasm/riscv: use t0 as alternative link register X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: The unprivileged ISA specification says that either RA or T0 should be used for this purpose. Other registers may confuse the return address prediction stack. --- tests/checkasm/riscv/checkasm.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tests/checkasm/riscv/checkasm.S b/tests/checkasm/riscv/checkasm.S index 73ca85f344..b902ab1043 100644 --- a/tests/checkasm/riscv/checkasm.S +++ b/tests/checkasm/riscv/checkasm.S @@ -123,10 +123,10 @@ func checkasm_get_wrapper, v /* Call the tested function */ la.tls.ie t0, checked_func - add t0, tp, t0 - ld t1, (t0) - sd zero, (t0) - jalr t1 + add t1, tp, t0 + ld t0, (t1) + sd zero, (t1) + jalr t0 /* Check special register values */ la.tls.ie t0, saved_regs -- 2.42.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".