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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x433.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" From: Richard Henderson Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-id: 20210525010358.152808-32-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/sve.decode | 3 ++ target/arm/translate-sve.c | 67 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 70 insertions(+) diff --git a/target/arm/sve.decode b/target/arm/sve.decode index ae853d21f2e..f3659075180 100644 --- a/target/arm/sve.decode +++ b/target/arm/sve.decode @@ -702,6 +702,9 @@ CTERM 00100101 1 sf:1 1 rm:5 001000 rn:5 ne:1= 0000 # SVE integer compare scalar count and limit WHILE 00100101 esz:2 1 rm:5 000 sf:1 u:1 lt:1 rn:5 eq:1 rd:4 =20 +# SVE2 pointer conflict compare +WHILE_ptr 00100101 esz:2 1 rm:5 001 100 rn:5 rw:1 rd:4 + ### SVE Integer Wide Immediate - Unpredicated Group =20 # SVE broadcast floating-point immediate (unpredicated) diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c index a55e747514f..64aecc2db46 100644 --- a/target/arm/translate-sve.c +++ b/target/arm/translate-sve.c @@ -3218,6 +3218,73 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *= a) return true; } =20 +static bool trans_WHILE_ptr(DisasContext *s, arg_WHILE_ptr *a) +{ + TCGv_i64 op0, op1, diff, t1, tmax; + TCGv_i32 t2, t3; + TCGv_ptr ptr; + unsigned vsz =3D vec_full_reg_size(s); + unsigned desc =3D 0; + + if (!dc_isar_feature(aa64_sve2, s)) { + return false; + } + if (!sve_access_check(s)) { + return true; + } + + op0 =3D read_cpu_reg(s, a->rn, 1); + op1 =3D read_cpu_reg(s, a->rm, 1); + + tmax =3D tcg_const_i64(vsz); + diff =3D tcg_temp_new_i64(); + + if (a->rw) { + /* WHILERW */ + /* diff =3D abs(op1 - op0), noting that op0/1 are unsigned. */ + t1 =3D tcg_temp_new_i64(); + tcg_gen_sub_i64(diff, op0, op1); + tcg_gen_sub_i64(t1, op1, op0); + tcg_gen_movcond_i64(TCG_COND_GEU, diff, op0, op1, diff, t1); + tcg_temp_free_i64(t1); + /* Round down to a multiple of ESIZE. */ + tcg_gen_andi_i64(diff, diff, -1 << a->esz); + /* If op1 =3D=3D op0, diff =3D=3D 0, and the condition is always t= rue. */ + tcg_gen_movcond_i64(TCG_COND_EQ, diff, op0, op1, tmax, diff); + } else { + /* WHILEWR */ + tcg_gen_sub_i64(diff, op1, op0); + /* Round down to a multiple of ESIZE. */ + tcg_gen_andi_i64(diff, diff, -1 << a->esz); + /* If op0 >=3D op1, diff <=3D 0, the condition is always true. */ + tcg_gen_movcond_i64(TCG_COND_GEU, diff, op0, op1, tmax, diff); + } + + /* Bound to the maximum. */ + tcg_gen_umin_i64(diff, diff, tmax); + tcg_temp_free_i64(tmax); + + /* Since we're bounded, pass as a 32-bit type. */ + t2 =3D tcg_temp_new_i32(); + tcg_gen_extrl_i64_i32(t2, diff); + tcg_temp_free_i64(diff); + + desc =3D FIELD_DP32(desc, PREDDESC, OPRSZ, vsz / 8); + desc =3D FIELD_DP32(desc, PREDDESC, ESZ, a->esz); + t3 =3D tcg_const_i32(desc); + + ptr =3D tcg_temp_new_ptr(); + tcg_gen_addi_ptr(ptr, cpu_env, pred_full_reg_offset(s, a->rd)); + + gen_helper_sve_whilel(t2, ptr, t2, t3); + do_pred_flags(t2); + + tcg_temp_free_ptr(ptr); + tcg_temp_free_i32(t2); + tcg_temp_free_i32(t3); + return true; +} + /* *** SVE Integer Wide Immediate - Unpredicated Group */ --=20 2.20.1