From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40733) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vx1sL-0002Vt-Js for qemu-devel@nongnu.org; Sat, 28 Dec 2013 16:56:54 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Vx1sK-0007F9-El for qemu-devel@nongnu.org; Sat, 28 Dec 2013 16:56:53 -0500 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:43947) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vx1sK-0007EA-8A for qemu-devel@nongnu.org; Sat, 28 Dec 2013 16:56:52 -0500 From: Peter Maydell Date: Sat, 28 Dec 2013 21:49:10 +0000 Message-Id: <1388267351-31818-10-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1388267351-31818-1-git-send-email-peter.maydell@linaro.org> References: <1388267351-31818-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PATCH 09/10] target-arm: A64: Add support for floating point cond select List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: patches@linaro.org, Michael Matz , Alexander Graf , Claudio Fontana , Dirk Mueller , Will Newton , Laurent Desnogues , =?UTF-8?q?Alex=20Benn=C3=A9e?= , kvmarm@lists.cs.columbia.edu, Christoffer Dall , Richard Henderson From: Claudio Fontana This adds decoding support for C3.6.24 FP conditional select. Signed-off-by: Claudio Fontana Signed-off-by: Peter Maydell --- target-arm/translate-a64.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index e8ce846..4ce1fb1 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -3319,6 +3319,20 @@ static void disas_fp_ccomp(DisasContext *s, uint32_t insn) } } +/* copy src FP register to dst FP register; type specifies single or double */ +static void gen_mov_fp2fp(DisasContext *s, int type, int dst, int src) +{ + if (type) { + TCGv_i64 v = read_fp_dreg(s, src); + write_fp_dreg(s, dst, v); + tcg_temp_free_i64(v); + } else { + TCGv_i32 v = read_fp_sreg(s, src); + write_fp_sreg(s, dst, v); + tcg_temp_free_i32(v); + } +} + /* C3.6.24 Floating point conditional select * 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0 * +---+---+---+-----------+------+---+------+------+-----+------+------+ @@ -3327,7 +3341,36 @@ static void disas_fp_ccomp(DisasContext *s, uint32_t insn) */ static void disas_fp_csel(DisasContext *s, uint32_t insn) { - unsupported_encoding(s, insn); + unsigned int mos, type, rm, cond, rn, rd; + int label_continue = -1; + + mos = extract32(insn, 29, 3); + type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ + rm = extract32(insn, 16, 5); + cond = extract32(insn, 12, 4); + rn = extract32(insn, 5, 5); + rd = extract32(insn, 0, 5); + + if (mos || type > 1) { + unallocated_encoding(s); + return; + } + + if (cond < 0x0e) { /* not always */ + int label_match = gen_new_label(); + label_continue = gen_new_label(); + arm_gen_test_cc(cond, label_match); + /* nomatch: */ + gen_mov_fp2fp(s, type, rd, rm); + tcg_gen_br(label_continue); + gen_set_label(label_match); + } + + gen_mov_fp2fp(s, type, rd, rn); + + if (cond < 0x0e) { /* continue */ + gen_set_label(label_continue); + } } /* C3.6.25 Floating point data-processing (1 source) -- 1.8.5