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Wed, 12 Aug 2026 21:14:00 -0700 (PDT) From: Zephyr Li To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, palmer@dabbelt.com, alistair.francis@wdc.com, liwei1518@gmail.com, daniel.barboza@oss.qualcomm.com, zhiwei_liu@linux.alibaba.com, chao.liu@processmission.com, Zephyr Li Subject: [PATCH] target/riscv: reject FMV.X.W and FMV.W.X with Zfinx Date: Thu, 13 Aug 2026 12:13:03 +0800 Message-ID: <20260813041304.7618-1-fritchleybohrer@gmail.com> X-Mailer: git-send-email 2.43.0 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:f8b0:4864:3b::; envelope-from=fritchleybohrer@gmail.com; helo=mail-pz2-x00.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 @gmail.com) X-ZM-MESSAGEID: 1786594503827158500 Content-Type: text/plain; charset="utf-8" Zfinx excludes FMV.X.W and FMV.W.X, but QEMU currently accepts both instructions when Zfinx is enabled without the F extension. Require the F extension for these instructions so they raise an illegal instruction exception on Zfinx-only CPUs. Add TCG regression tests for both instructions. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/4108 Signed-off-by: Zephyr Li --- target/riscv/tcg/insn_trans/trans_rvf.c.inc | 4 +-- tests/tcg/riscv64/Makefile.target | 10 +++++++ tests/tcg/riscv64/test-zfinx-fmv-w-x.S | 33 +++++++++++++++++++++ tests/tcg/riscv64/test-zfinx-fmv-x-w.S | 33 +++++++++++++++++++++ 4 files changed, 78 insertions(+), 2 deletions(-) create mode 100644 tests/tcg/riscv64/test-zfinx-fmv-w-x.S create mode 100644 tests/tcg/riscv64/test-zfinx-fmv-x-w.S diff --git a/target/riscv/tcg/insn_trans/trans_rvf.c.inc b/target/riscv/tcg= /insn_trans/trans_rvf.c.inc index e935523c93..70c66e9e25 100644 --- a/target/riscv/tcg/insn_trans/trans_rvf.c.inc +++ b/target/riscv/tcg/insn_trans/trans_rvf.c.inc @@ -428,7 +428,7 @@ static bool trans_fmv_x_w(DisasContext *ctx, arg_fmv_x_= w *a) { /* NOTE: This was FMV.X.S in an earlier version of the ISA spec! */ REQUIRE_FPU; - REQUIRE_ZFINX_OR_F(ctx); + REQUIRE_EXT(ctx, RVF); =20 TCGv dest =3D dest_gpr(ctx, a->rd); TCGv_i64 src1 =3D get_fpr_hs(ctx, a->rs1); @@ -531,7 +531,7 @@ static bool trans_fmv_w_x(DisasContext *ctx, arg_fmv_w_= x *a) { /* NOTE: This was FMV.S.X in an earlier version of the ISA spec! */ REQUIRE_FPU; - REQUIRE_ZFINX_OR_F(ctx); + REQUIRE_EXT(ctx, RVF); =20 TCGv_i64 dest =3D dest_fpr(ctx, a->rd); TCGv src =3D get_gpr(ctx, a->rs1, EXT_ZERO); diff --git a/tests/tcg/riscv64/Makefile.target b/tests/tcg/riscv64/Makefile= .target index 4da5b9a3b3..23e1152a10 100644 --- a/tests/tcg/riscv64/Makefile.target +++ b/tests/tcg/riscv64/Makefile.target @@ -18,3 +18,13 @@ TESTS +=3D test-fcvtmod test-fcvtmod: CFLAGS +=3D -march=3Drv64imafdc test-fcvtmod: LDFLAGS +=3D -static run-test-fcvtmod: QEMU_OPTS +=3D -cpu rv64,d=3Dtrue,zfa=3Dtrue + +TESTS +=3D test-zfinx-fmv-x-w +test-zfinx-fmv-x-w: LDFLAGS =3D -nostdlib -static +run-test-zfinx-fmv-x-w: QEMU_OPTS +=3D \ + -cpu rv64,f=3Dfalse,d=3Dfalse,zfa=3Dfalse,zfh=3Dfalse,zfhmin=3Dfalse,zfin= x=3Dtrue + +TESTS +=3D test-zfinx-fmv-w-x +test-zfinx-fmv-w-x: LDFLAGS =3D -nostdlib -static +run-test-zfinx-fmv-w-x: QEMU_OPTS +=3D \ + -cpu rv64,f=3Dfalse,d=3Dfalse,zfa=3Dfalse,zfh=3Dfalse,zfhmin=3Dfalse,zfin= x=3Dtrue diff --git a/tests/tcg/riscv64/test-zfinx-fmv-w-x.S b/tests/tcg/riscv64/tes= t-zfinx-fmv-w-x.S new file mode 100644 index 0000000000..73c5c2b2bf --- /dev/null +++ b/tests/tcg/riscv64/test-zfinx-fmv-w-x.S @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#include + + .text + .globl _start +_start: + .option norvc + + li a0, 4 + la a1, sa + li a2, 0 + li a3, 8 + li a7, __NR_rt_sigaction + scall + + .word 0xf0030453 + + li a0, 1 + j exit + +pass: + li a0, 0 + +exit: + li a7, __NR_exit + scall + + .data + .type sa, @object + .size sa, 32 +sa: + .dword pass + .zero 24 diff --git a/tests/tcg/riscv64/test-zfinx-fmv-x-w.S b/tests/tcg/riscv64/tes= t-zfinx-fmv-x-w.S new file mode 100644 index 0000000000..c4e853036f --- /dev/null +++ b/tests/tcg/riscv64/test-zfinx-fmv-x-w.S @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#include + + .text + .globl _start +_start: + .option norvc + + li a0, 4 + la a1, sa + li a2, 0 + li a3, 8 + li a7, __NR_rt_sigaction + scall + + .word 0xe0030453 + + li a0, 1 + j exit + +pass: + li a0, 0 + +exit: + li a7, __NR_exit + scall + + .data + .type sa, @object + .size sa, 32 +sa: + .dword pass + .zero 24 --=20 2.43.0