From patchwork Mon Nov 7 14:44:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Koppelmann X-Patchwork-Id: 9415345 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AC96760585 for ; Mon, 7 Nov 2016 14:52:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9F8F428A9B for ; Mon, 7 Nov 2016 14:52:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9265428AC7; Mon, 7 Nov 2016 14:52:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1E7D028A9B for ; Mon, 7 Nov 2016 14:52:07 +0000 (UTC) Received: from localhost ([::1]:54466 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c3lHK-0000yf-2z for patchwork-qemu-devel@patchwork.kernel.org; Mon, 07 Nov 2016 09:52:06 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54601) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c3lAv-0004yI-CL for qemu-devel@nongnu.org; Mon, 07 Nov 2016 09:45:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c3lAq-0006iq-D4 for qemu-devel@nongnu.org; Mon, 07 Nov 2016 09:45:29 -0500 Received: from mail.uni-paderborn.de ([131.234.142.9]:60302) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1c3lAq-0006i1-6A for qemu-devel@nongnu.org; Mon, 07 Nov 2016 09:45:24 -0500 From: Bastian Koppelmann To: qemu-devel@nongnu.org Date: Mon, 7 Nov 2016 15:44:41 +0100 Message-Id: <20161107144445.14069-2-kbastian@mail.uni-paderborn.de> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161107144445.14069-1-kbastian@mail.uni-paderborn.de> References: <20161107144445.14069-1-kbastian@mail.uni-paderborn.de> X-IMT-Spam-Score: 0.0 () X-PMX-Version: 6.3.1.2588712, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2016.11.7.143618 X-IMT-Authenticated-Sender: uid=kbastian,ou=People,o=upb,c=de X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 131.234.142.9 Subject: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rth@twiddle.net Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Converts a 32-bit floating point number to an unsigned int. The result is rounded towards zero. Signed-off-by: Bastian Koppelmann --- v1 -> v2: - ftouz: Correctly convert the result from uint32 to f32 target-tricore/fpu_helper.c | 43 +++++++++++++++++++++++++++++++++++++++++++ target-tricore/helper.h | 1 + target-tricore/translate.c | 3 +++ 3 files changed, 47 insertions(+) diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c index 98fe947..f717b53 100644 --- a/target-tricore/fpu_helper.c +++ b/target-tricore/fpu_helper.c @@ -215,3 +215,46 @@ uint32_t helper_itof(CPUTriCoreState *env, uint32_t arg) } return (uint32_t)f_result; } + +uint32_t helper_ftouz(CPUTriCoreState *env, uint32_t arg) +{ + float32 f_arg = make_float32(arg); + uint32_t result; + int32_t flags; + result = float32_to_uint32_round_to_zero(f_arg, &env->fp_status); + + flags = f_get_excp_flags(env); + if (flags) { + if (float32_is_any_nan(f_arg)) { + flags |= float_flag_invalid; + result = 0; + /* f_real(D[a]) < 0.0 */ + } else if (float32_lt_quiet(f_arg, 0.0, &env->fp_status)) { + flags |= float_flag_invalid; + result = 0; + /* f_real(D[a]) > 2^32 -1 */ + } else if (float32_lt_quiet(0x4f800000, f_arg, &env->fp_status)) { + flags |= float_flag_invalid; + result = 0xffffffff; + } else { + flags &= ~float_flag_invalid; + } + /* once invalid flag has been set, we cannot set inexact anymore + since each FPU operation can only assert ONE flag. (see + TriCore ISA Manual Vol. 1 (11-9)) */ + if (!(flags & float_flag_invalid)) { + if (!float32_eq(f_arg, uint32_to_float32(result, &env->fp_status), + &env->fp_status)) { + flags |= float_flag_inexact; + } else { + flags &= ~float_flag_inexact; + } + } else { + flags &= ~float_flag_inexact; + } + f_update_psw_flags(env, flags); + } else { + env->FPU_FS = 0; + } + return result; +} diff --git a/target-tricore/helper.h b/target-tricore/helper.h index 9333e16..467c880 100644 --- a/target-tricore/helper.h +++ b/target-tricore/helper.h @@ -112,6 +112,7 @@ DEF_HELPER_3(fdiv, i32, env, i32, i32) DEF_HELPER_3(fcmp, i32, env, i32, i32) DEF_HELPER_2(ftoi, i32, env, i32) DEF_HELPER_2(itof, i32, env, i32) +DEF_HELPER_2(ftouz, i32, env, i32) /* dvinit */ DEF_HELPER_3(dvinit_b_13, i64, env, i32, i32) DEF_HELPER_3(dvinit_b_131, i64, env, i32, i32) diff --git a/target-tricore/translate.c b/target-tricore/translate.c index 9a50df9..27c6d31 100644 --- a/target-tricore/translate.c +++ b/target-tricore/translate.c @@ -6698,6 +6698,9 @@ static void decode_rr_divide(CPUTriCoreState *env, DisasContext *ctx) case OPC2_32_RR_ITOF: gen_helper_itof(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]); break; + case OPC2_32_RR_FTOUZ: + gen_helper_ftouz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]); + break; default: generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC); }