From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44078) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e32sc-0000cB-IP for qemu-devel@nongnu.org; Fri, 13 Oct 2017 12:32:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e32sY-0002Hc-RM for qemu-devel@nongnu.org; Fri, 13 Oct 2017 12:32:10 -0400 Received: from mail-wm0-x232.google.com ([2a00:1450:400c:c09::232]:50729) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e32sY-0002H1-Kb for qemu-devel@nongnu.org; Fri, 13 Oct 2017 12:32:06 -0400 Received: by mail-wm0-x232.google.com with SMTP id u138so22538586wmu.5 for ; Fri, 13 Oct 2017 09:32:06 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Fri, 13 Oct 2017 17:24:26 +0100 Message-Id: <20171013162438.32458-19-alex.bennee@linaro.org> In-Reply-To: <20171013162438.32458-1-alex.bennee@linaro.org> References: <20171013162438.32458-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [RFC PATCH 18/30] target/arm/translate-a64.c: add AdvSIMD scalar two-reg misc skeleton List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: richard.henderson@linaro.org Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= This is just the decode skeleton which will be filled out by later patches. Signed-off-by: Alex Bennée --- target/arm/translate-a64.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index d12106695f..11990daff4 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -10568,6 +10568,40 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) } } +/* AdvSIMD two reg misc FP16 + * 31 30 29 28 24 23 22 21 17 16 12 11 10 9 5 4 0 + * +---+---+---+-----------+---+-------------+--------+-----+------+------+ + * | 0 | 1 | U | 1 1 1 1 0 | a | 1 1 1 1 0 0 | opcode | 1 0 | Rn | Rd | + * +---+---+---+-----------+---+-------------+--------+-----+------+------+ + * mask: 1101 1111 0111 1110 0000 1100 0000 0000 0xdf7e 0c00 + * val: 0101 1110 0111 1000 0000 1000 0000 0000 0x5e78 0800 + * Half-precision variants of two-reg misc. + */ +static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn) +{ + int fpop, opcode, a; + + if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) { + unallocated_encoding(s); + return; + } + + if (!fp_access_check(s)) { + return; + } + + opcode = extract32(insn, 12, 4); + a = extract32(insn, 23, 1); + fpop = deposit32(opcode, 5, 1, a); + + switch (fpop) { + default: + fprintf(stderr,"%s: insn %#04x fpop %#2x\n", __func__, insn, fpop); + g_assert_not_reached(); + } + +} + /* AdvSIMD scalar x indexed element * 31 30 29 28 24 23 22 21 20 19 16 15 12 11 10 9 5 4 0 * +-----+---+-----------+------+---+---+------+-----+---+---+------+------+ @@ -11270,6 +11304,7 @@ static const AArch64DecodeTable data_proc_simd[] = { { 0x5e000000, 0xff208c00, disas_crypto_three_reg_sha }, { 0x5e280800, 0xff3e0c00, disas_crypto_two_reg_sha }, { 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 }, + { 0x5e780800, 0xdf7e0c00, disas_simd_two_reg_misc_fp16 }, { 0x00000000, 0x00000000, NULL } }; -- 2.14.1