From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:42635) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RrKLy-0005fO-LA for qemu-devel@nongnu.org; Sat, 28 Jan 2012 21:18:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RrKLx-0001Nk-Pr for qemu-devel@nongnu.org; Sat, 28 Jan 2012 21:18:50 -0500 Received: from mail-bk0-f45.google.com ([209.85.214.45]:58397) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RrKLx-0001Ng-HT for qemu-devel@nongnu.org; Sat, 28 Jan 2012 21:18:49 -0500 Received: by bkbzu17 with SMTP id zu17so2552304bkb.4 for ; Sat, 28 Jan 2012 18:18:48 -0800 (PST) From: Max Filippov Date: Sun, 29 Jan 2012 06:18:28 +0400 Message-Id: <1327803508-30508-1-git-send-email-jcmvbkbc@gmail.com> Subject: [Qemu-devel] [PATCH] target-xtensa: fetch 3rd opcode byte only when needed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Max Filippov According to ISA, 3.5.4, third opcode byte should not be fetched for 2-byte instructions. Signed-off-by: Max Filippov --- target-xtensa/translate.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index c81450d..6a0177f 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -749,7 +749,7 @@ static void disas_xtensa_insn(DisasContext *dc) uint8_t b0 = ldub_code(dc->pc); uint8_t b1 = ldub_code(dc->pc + 1); - uint8_t b2 = ldub_code(dc->pc + 2); + uint8_t b2 = 0; static const uint32_t B4CONST[] = { 0xffffffff, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 16, 32, 64, 128, 256 @@ -764,6 +764,7 @@ static void disas_xtensa_insn(DisasContext *dc) HAS_OPTION(XTENSA_OPTION_CODE_DENSITY); } else { dc->next_pc = dc->pc + 3; + b2 = ldub_code(dc->pc + 2); } switch (OP0) { -- 1.7.7.6