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Diffstat (limited to 'gitlab/issues/target_riscv/host_missing/accel_TCG/1441.toml')
| -rw-r--r-- | gitlab/issues/target_riscv/host_missing/accel_TCG/1441.toml | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gitlab/issues/target_riscv/host_missing/accel_TCG/1441.toml b/gitlab/issues/target_riscv/host_missing/accel_TCG/1441.toml new file mode 100644 index 000000000..e42225cec --- /dev/null +++ b/gitlab/issues/target_riscv/host_missing/accel_TCG/1441.toml @@ -0,0 +1,42 @@ +id = 1441 +title = "Assertion failure when executing RISC-V vfncvt.rtz.x.f.w instruction" +state = "closed" +created_at = "2023-01-13T22:10:02.691Z" +closed_at = "2023-01-17T17:39:50.962Z" +labels = ["Closed::Duplicate", "accel: TCG", "target: riscv"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/1441" +host-os = "RHEL 8.6" +host-arch = "x86" +qemu-version = "7.2.50" +guest-os = "n/a" +guest-arch = "RISC-V" +description = """When emulating the `vfncvt.rtz.x.f.w` instruction, QEMU crashes with an assertion failure at `target/riscv/translate.c:211`, complaining that ```decode_save_opc: Assertion `ctx->insn_start != NULL' failed.``` + +It appears this problem first emerged with https://gitlab.com/qemu-project/qemu/-/commit/a9814e3e08d2aacbd9018c36c77c2fb652537848""" +reproduce = """The following C program triggers the assertion failure when built a sufficiently recent version of the Clang cross compiler (in my case 15.0.6): +``` +/* test.c */ +#include <riscv_vector.h> + +#define LEN 4 + +int main(int argc, char *argv[]) { + double in[LEN]; + int out[LEN]; + + vfloat64m1_t vf = vle64_v_f64m1(in, LEN); + vint32mf2_t vi = vfncvt_rtz_x_f_w_i32mf2(vf, LEN); + vse32_v_i32mf2(out, vi, LEN); + + return 0; +} +``` + +The above `test.c` can be compiled and run as follows: +``` +clang -O3 -march=rv64gcv -static test.c +qemu-riscv64 -cpu "rv64,zba=true,zbb=true,zbc=true,zbs=true,v=true,vlen=512,elen=64,vext_spec=v1.0" a.out +qemu-riscv64: ../target/riscv/translate.c:211: decode_save_opc: Assertion `ctx->insn_start != NULL' failed. +Segmentation fault (core dumped) +```""" +additional = """""" |