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Wed, 05 Aug 2026 09:44:05 -0700 (PDT) From: frank.chang@sifive.com To: qemu-devel@nongnu.org Cc: Alistair Francis , Palmer Dabbelt , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Chao Liu , qemu-riscv@nongnu.org (open list:SiFive Machines), Frank Chang Subject: [PATCH v7 5/8] target/riscv: Support raising misaligned exceptions for floating-point loads/stores Date: Thu, 6 Aug 2026 00:43:42 +0800 Message-ID: <20260805164345.698208-6-frank.chang@sifive.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260805164345.698208-1-frank.chang@sifive.com> References: <20260805164345.698208-1-frank.chang@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=frank.chang@sifive.com; helo=mail-pl1-x632.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: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @sifive.com) X-ZM-MESSAGEID: 1785948363444158500 Content-Type: text/plain; charset="utf-8" From: Frank Chang When the Zicclsm extension is not enabled, raise misaligned load/store exceptions for misaligned accesses from floating-point load/store instructions (RVF, RVD, Zfh). Signed-off-by: Frank Chang Reviewed-by: Daniel Henrique Barboza --- target/riscv/tcg/insn_trans/trans_rvd.c.inc | 6 ++++++ target/riscv/tcg/insn_trans/trans_rvf.c.inc | 6 ++++++ target/riscv/tcg/insn_trans/trans_rvzfh.c.inc | 6 ++++++ 3 files changed, 18 insertions(+) diff --git a/target/riscv/tcg/insn_trans/trans_rvd.c.inc b/target/riscv/tcg= /insn_trans/trans_rvd.c.inc index 3b9a745520a..1be2bee9465 100644 --- a/target/riscv/tcg/insn_trans/trans_rvd.c.inc +++ b/target/riscv/tcg/insn_trans/trans_rvd.c.inc @@ -61,6 +61,9 @@ static bool trans_fld(DisasContext *ctx, arg_fld *a) memop |=3D MO_ATOM_IFALIGN; } memop |=3D ctx->mo_endianness; + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } =20 decode_save_opc(ctx, 0); addr =3D get_address(ctx, a->rs1, a->imm); @@ -86,6 +89,9 @@ static bool trans_fsd(DisasContext *ctx, arg_fsd *a) memop |=3D MO_ATOM_IFALIGN; } memop |=3D ctx->mo_endianness; + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } =20 decode_save_opc(ctx, 0); addr =3D get_address(ctx, a->rs1, a->imm); diff --git a/target/riscv/tcg/insn_trans/trans_rvf.c.inc b/target/riscv/tcg= /insn_trans/trans_rvf.c.inc index e935523c93c..481f7282da7 100644 --- a/target/riscv/tcg/insn_trans/trans_rvf.c.inc +++ b/target/riscv/tcg/insn_trans/trans_rvf.c.inc @@ -52,6 +52,9 @@ static bool trans_flw(DisasContext *ctx, arg_flw *a) if (ctx->cfg_ptr->ext_zama16b) { memop |=3D MO_ATOM_WITHIN16; } + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } =20 decode_save_opc(ctx, 0); addr =3D get_address(ctx, a->rs1, a->imm); @@ -75,6 +78,9 @@ static bool trans_fsw(DisasContext *ctx, arg_fsw *a) if (ctx->cfg_ptr->ext_zama16b) { memop |=3D MO_ATOM_WITHIN16; } + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } =20 decode_save_opc(ctx, 0); addr =3D get_address(ctx, a->rs1, a->imm); diff --git a/target/riscv/tcg/insn_trans/trans_rvzfh.c.inc b/target/riscv/t= cg/insn_trans/trans_rvzfh.c.inc index f36b46c2118..88711fb0769 100644 --- a/target/riscv/tcg/insn_trans/trans_rvzfh.c.inc +++ b/target/riscv/tcg/insn_trans/trans_rvzfh.c.inc @@ -50,6 +50,9 @@ static bool trans_flh(DisasContext *ctx, arg_flh *a) REQUIRE_ZFHMIN_OR_ZFBFMIN(ctx); =20 memop |=3D ctx->mo_endianness; + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } decode_save_opc(ctx, 0); t0 =3D get_gpr(ctx, a->rs1, EXT_NONE); if (a->imm) { @@ -75,6 +78,9 @@ static bool trans_fsh(DisasContext *ctx, arg_fsh *a) REQUIRE_ZFHMIN_OR_ZFBFMIN(ctx); =20 memop |=3D ctx->mo_endianness; + if (!ctx->cfg_ptr->ext_zicclsm) { + memop |=3D MO_ALIGN; + } decode_save_opc(ctx, 0); t0 =3D get_gpr(ctx, a->rs1, EXT_NONE); if (a->imm) { --=20 2.43.0