From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52804) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WOXI9-0002vI-Ch for qemu-devel@nongnu.org; Fri, 14 Mar 2014 14:57:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WOXI8-0000h7-5v for qemu-devel@nongnu.org; Fri, 14 Mar 2014 14:57:13 -0400 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:46813) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WOXI7-0000gf-W5 for qemu-devel@nongnu.org; Fri, 14 Mar 2014 14:57:12 -0400 From: Peter Maydell Date: Fri, 14 Mar 2014 18:37:51 +0000 Message-Id: <1394822294-14837-3-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1394822294-14837-1-git-send-email-peter.maydell@linaro.org> References: <1394822294-14837-1-git-send-email-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v2 02/25] target-arm: A64: Fix bug in add_sub_ext handling of rn List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Crosthwaite , patches@linaro.org, Michael Matz , Alexander Graf , Will Newton , Dirk Mueller , Laurent Desnogues , =?UTF-8?q?Alex=20Benn=C3=A9e?= , kvmarm@lists.cs.columbia.edu, Christoffer Dall , Richard Henderson From: Alex Bennée rn == 31 always means SP (not XZR) whether an add_sub_ext instruction is setting the flags or not; only rd has behaviour dependent on whether we are setting flags. Reported-by: Laurent Desnogues Signed-off-by: Alex Bennée Signed-off-by: Peter Maydell --- target-arm/translate-a64.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 37252b7..444dd85 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -3096,12 +3096,11 @@ static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) /* non-flag setting ops may use SP */ if (!setflags) { - tcg_rn = read_cpu_reg_sp(s, rn, sf); tcg_rd = cpu_reg_sp(s, rd); } else { - tcg_rn = read_cpu_reg(s, rn, sf); tcg_rd = cpu_reg(s, rd); } + tcg_rn = read_cpu_reg_sp(s, rn, sf); tcg_rm = read_cpu_reg(s, rm, sf); ext_and_shift_reg(tcg_rm, tcg_rm, option, imm3); -- 1.9.0