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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: 20200626033144.790098-12-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/helper-a64.h | 1 + target/arm/internals.h | 9 +++++++ target/arm/mte_helper.c | 10 ++++++++ target/arm/translate-a64.c | 51 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 71 insertions(+) diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h index 587ccbe42ff..6c116481e8f 100644 --- a/target/arm/helper-a64.h +++ b/target/arm/helper-a64.h @@ -105,3 +105,4 @@ DEF_HELPER_FLAGS_2(xpaci, TCG_CALL_NO_RWG_SE, i64, env,= i64) DEF_HELPER_FLAGS_2(xpacd, TCG_CALL_NO_RWG_SE, i64, env, i64) =20 DEF_HELPER_FLAGS_3(irg, TCG_CALL_NO_RWG, i64, env, i64, i64) +DEF_HELPER_FLAGS_4(addsubg, TCG_CALL_NO_RWG_SE, i64, env, i64, s32, i32) diff --git a/target/arm/internals.h b/target/arm/internals.h index ae611a6ff5d..5c69d4e5a56 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -1261,6 +1261,15 @@ void arm_log_exception(int idx); */ #define GMID_EL1_BS 6 =20 +/* We associate one allocation tag per 16 bytes, the minimum. */ +#define LOG2_TAG_GRANULE 4 +#define TAG_GRANULE (1 << LOG2_TAG_GRANULE) + +static inline int allocation_tag_from_addr(uint64_t ptr) +{ + return extract64(ptr, 56, 4); +} + static inline uint64_t address_with_allocation_tag(uint64_t ptr, int rtag) { return deposit64(ptr, 56, 4, rtag); diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c index 539a04de84b..9ab9ed749d8 100644 --- a/target/arm/mte_helper.c +++ b/target/arm/mte_helper.c @@ -70,3 +70,13 @@ uint64_t HELPER(irg)(CPUARMState *env, uint64_t rn, uint= 64_t rm) =20 return address_with_allocation_tag(rn, rtag); } + +uint64_t HELPER(addsubg)(CPUARMState *env, uint64_t ptr, + int32_t offset, uint32_t tag_offset) +{ + int start_tag =3D allocation_tag_from_addr(ptr); + uint16_t exclude =3D extract32(env->cp15.gcr_el1, 0, 16); + int rtag =3D choose_nonexcluded_tag(start_tag, tag_offset, exclude); + + return address_with_allocation_tag(ptr + offset, rtag); +} diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 03aa0925983..2ec02c8a5f3 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -3808,6 +3808,54 @@ static void disas_add_sub_imm(DisasContext *s, uint3= 2_t insn) tcg_temp_free_i64(tcg_result); } =20 +/* + * Add/subtract (immediate, with tags) + * + * 31 30 29 28 23 22 21 16 14 10 9 5 4 0 + * +--+--+--+-------------+--+---------+--+-------+-----+-----+ + * |sf|op| S| 1 0 0 0 1 1 |o2| uimm6 |o3| uimm4 | Rn | Rd | + * +--+--+--+-------------+--+---------+--+-------+-----+-----+ + * + * op: 0 -> add, 1 -> sub + */ +static void disas_add_sub_imm_with_tags(DisasContext *s, uint32_t insn) +{ + int rd =3D extract32(insn, 0, 5); + int rn =3D extract32(insn, 5, 5); + int uimm4 =3D extract32(insn, 10, 4); + int uimm6 =3D extract32(insn, 16, 6); + bool sub_op =3D extract32(insn, 30, 1); + TCGv_i64 tcg_rn, tcg_rd; + int imm; + + /* Test all of sf=3D1, S=3D0, o2=3D0, o3=3D0. */ + if ((insn & 0xa040c000u) !=3D 0x80000000u || + !dc_isar_feature(aa64_mte_insn_reg, s)) { + unallocated_encoding(s); + return; + } + + imm =3D uimm6 << LOG2_TAG_GRANULE; + if (sub_op) { + imm =3D -imm; + } + + tcg_rn =3D cpu_reg_sp(s, rn); + tcg_rd =3D cpu_reg_sp(s, rd); + + if (s->ata) { + TCGv_i32 offset =3D tcg_const_i32(imm); + TCGv_i32 tag_offset =3D tcg_const_i32(uimm4); + + gen_helper_addsubg(tcg_rd, cpu_env, tcg_rn, offset, tag_offset); + tcg_temp_free_i32(tag_offset); + tcg_temp_free_i32(offset); + } else { + tcg_gen_addi_i64(tcg_rd, tcg_rn, imm); + gen_address_with_allocation_tag0(tcg_rd, tcg_rd); + } +} + /* The input should be a value in the bottom e bits (with higher * bits zero); returns that value replicated into every element * of size e in a 64 bit integer. @@ -4170,6 +4218,9 @@ static void disas_data_proc_imm(DisasContext *s, uint= 32_t insn) case 0x22: /* Add/subtract (immediate) */ disas_add_sub_imm(s, insn); break; + case 0x23: /* Add/subtract (immediate, with tags) */ + disas_add_sub_imm_with_tags(s, insn); + break; case 0x24: /* Logical (immediate) */ disas_logic_imm(s, insn); break; --=20 2.20.1