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X-Received-From: 2607:f8b0:4864:20::444 Subject: [Qemu-devel] [PATCH v2 61/68] target/arm: Convert T16, Conditional branches, Supervisor call 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: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/translate.c | 26 +++----------------------- target/arm/t16.decode | 12 ++++++++++++ 2 files changed, 15 insertions(+), 23 deletions(-) diff --git a/target/arm/translate.c b/target/arm/translate.c index 5f876290ba..941266df14 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -10599,7 +10599,7 @@ static void disas_thumb2_insn(DisasContext *s, uint= 32_t insn) =20 static void disas_thumb_insn(DisasContext *s, uint32_t insn) { - uint32_t val, op, rm, rd, shift, cond; + uint32_t val, op, rm, rd, shift; int32_t offset; TCGv_i32 tmp; TCGv_i32 tmp2; @@ -10738,28 +10738,8 @@ static void disas_thumb_insn(DisasContext *s, uint= 32_t insn) } break; =20 - case 13: - /* conditional branch or swi */ - cond =3D (insn >> 8) & 0xf; - if (cond =3D=3D 0xe) - goto undef; - - if (cond =3D=3D 0xf) { - /* swi */ - gen_set_pc_im(s, s->base.pc_next); - s->svc_imm =3D extract32(insn, 0, 8); - s->base.is_jmp =3D DISAS_SWI; - break; - } - /* generate a conditional jump to next instruction */ - arm_skip_unless(s, cond); - - /* jump to the offset */ - val =3D read_pc(s); - offset =3D ((int32_t)insn << 24) >> 24; - val +=3D offset << 1; - gen_jmp(s, val); - break; + case 13: /* conditional branch or swi, in decodetree */ + goto illegal_op; =20 case 14: if (insn & (1 << 11)) { diff --git a/target/arm/t16.decode b/target/arm/t16.decode index d731402036..98d60952a1 100644 --- a/target/arm/t16.decode +++ b/target/arm/t16.decode @@ -28,11 +28,13 @@ &rr !extern rd rm &ri !extern rd imm &r !extern rm +&i !extern imm &ldst_rr !extern p w u rn rt rm shimm shtype &ldst_ri !extern p w u rn rt imm &ldst_block !extern rn i b u w list &setend !extern E &cps !extern mode imod M A I F +&ci !extern cond imm =20 # Set S if the instruction is outside of an IT block. %s !function=3Dt16_setflags @@ -231,3 +233,13 @@ STM 1011 010 ......... \ &ldst_block i=3D0 b=3D1 u=3D0 w=3D1 rn=3D13 list=3D%push_l= ist LDM_t16 1011 110 ......... \ &ldst_block i=3D1 b=3D0 u=3D0 w=3D1 rn=3D13 list=3D%pop_li= st + +# Conditional branches, Supervisor call + +%imm8_0x2 0:s8 !function=3Dtimes_2 + +{ + UDF 1101 1110 ---- ---- + SVC 1101 1111 imm:8 &i + B_cond_thumb 1101 cond:4 ........ &ci imm=3D%imm8_0x2 +} --=20 2.17.1