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That's all we know. 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=_AUTOLEARN 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: 20200626033144.790098-29-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/translate-sve.c | 61 +++++++++++++++++++++----------------- 1 file changed, 33 insertions(+), 28 deletions(-) diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c index ac7b3119e5f..11e0dfc2100 100644 --- a/target/arm/translate-sve.c +++ b/target/arm/translate-sve.c @@ -4342,71 +4342,76 @@ static void do_ldr(DisasContext *s, uint32_t vofs, = int len, int rn, int imm) int len_remain =3D len % 8; int nparts =3D len / 8 + ctpop8(len_remain); int midx =3D get_mem_index(s); - TCGv_i64 addr, t0, t1; + TCGv_i64 dirty_addr, clean_addr, t0, t1; =20 - addr =3D tcg_temp_new_i64(); - t0 =3D tcg_temp_new_i64(); + dirty_addr =3D tcg_temp_new_i64(); + tcg_gen_addi_i64(dirty_addr, cpu_reg_sp(s, rn), imm); + clean_addr =3D gen_mte_checkN(s, dirty_addr, false, rn !=3D 31, len, M= O_8); + tcg_temp_free_i64(dirty_addr); =20 - /* Note that unpredicated load/store of vector/predicate registers + /* + * Note that unpredicated load/store of vector/predicate registers * are defined as a stream of bytes, which equates to little-endian - * operations on larger quantities. There is no nice way to force - * a little-endian load for aarch64_be-linux-user out of line. - * + * operations on larger quantities. * Attempt to keep code expansion to a minimum by limiting the * amount of unrolling done. */ if (nparts <=3D 4) { int i; =20 + t0 =3D tcg_temp_new_i64(); for (i =3D 0; i < len_align; i +=3D 8) { - tcg_gen_addi_i64(addr, cpu_reg_sp(s, rn), imm + i); - tcg_gen_qemu_ld_i64(t0, addr, midx, MO_LEQ); + tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEQ); tcg_gen_st_i64(t0, cpu_env, vofs + i); + tcg_gen_addi_i64(clean_addr, cpu_reg_sp(s, rn), 8); } + tcg_temp_free_i64(t0); } else { TCGLabel *loop =3D gen_new_label(); TCGv_ptr tp, i =3D tcg_const_local_ptr(0); =20 + /* Copy the clean address into a local temp, live across the loop.= */ + t0 =3D clean_addr; + clean_addr =3D tcg_temp_local_new_i64(); + tcg_gen_mov_i64(clean_addr, t0); + tcg_temp_free_i64(t0); + gen_set_label(loop); =20 - /* Minimize the number of local temps that must be re-read from - * the stack each iteration. Instead, re-compute values other - * than the loop counter. - */ + t0 =3D tcg_temp_new_i64(); + tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEQ); + tcg_gen_addi_i64(clean_addr, clean_addr, 8); + tp =3D tcg_temp_new_ptr(); - tcg_gen_addi_ptr(tp, i, imm); - tcg_gen_extu_ptr_i64(addr, tp); - tcg_gen_add_i64(addr, addr, cpu_reg_sp(s, rn)); - - tcg_gen_qemu_ld_i64(t0, addr, midx, MO_LEQ); - tcg_gen_add_ptr(tp, cpu_env, i); tcg_gen_addi_ptr(i, i, 8); tcg_gen_st_i64(t0, tp, vofs); tcg_temp_free_ptr(tp); + tcg_temp_free_i64(t0); =20 tcg_gen_brcondi_ptr(TCG_COND_LTU, i, len_align, loop); tcg_temp_free_ptr(i); } =20 - /* Predicate register loads can be any multiple of 2. + /* + * Predicate register loads can be any multiple of 2. * Note that we still store the entire 64-bit unit into cpu_env. */ if (len_remain) { - tcg_gen_addi_i64(addr, cpu_reg_sp(s, rn), imm + len_align); - + t0 =3D tcg_temp_new_i64(); switch (len_remain) { case 2: case 4: case 8: - tcg_gen_qemu_ld_i64(t0, addr, midx, MO_LE | ctz32(len_remain)); + tcg_gen_qemu_ld_i64(t0, clean_addr, midx, + MO_LE | ctz32(len_remain)); break; =20 case 6: t1 =3D tcg_temp_new_i64(); - tcg_gen_qemu_ld_i64(t0, addr, midx, MO_LEUL); - tcg_gen_addi_i64(addr, addr, 4); - tcg_gen_qemu_ld_i64(t1, addr, midx, MO_LEUW); + tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUL); + tcg_gen_addi_i64(clean_addr, clean_addr, 4); + tcg_gen_qemu_ld_i64(t1, clean_addr, midx, MO_LEUW); tcg_gen_deposit_i64(t0, t0, t1, 32, 32); tcg_temp_free_i64(t1); break; @@ -4415,9 +4420,9 @@ static void do_ldr(DisasContext *s, uint32_t vofs, in= t len, int rn, int imm) g_assert_not_reached(); } tcg_gen_st_i64(t0, cpu_env, vofs + len_align); + tcg_temp_free_i64(t0); } - tcg_temp_free_i64(addr); - tcg_temp_free_i64(t0); + tcg_temp_free_i64(clean_addr); } =20 /* Similarly for stores. */ --=20 2.20.1