tests/cocotb/rvv/vill_test.cc

// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Tests instruction raises fault when vill bit is set.

#include <riscv_vector.h>
#include <stdint.h>

uint32_t faulted __attribute__((section(".data"))) = 0;
uint32_t mcause __attribute__((section(".data"))) = 0;
uint32_t mtval __attribute__((section(".data"))) = 0;

// Fault handler to log fault
extern "C" {
void kelvin_exception_handler() {
  faulted = 1;
  uint32_t local_mcause;
  asm volatile("csrr %0, mcause" : "=r"(local_mcause));
  mcause = local_mcause;
  uint32_t local_mtval;
  asm volatile("csrr %0, mtval" : "=r"(local_mtval));
  mtval = local_mtval;

  asm volatile("ebreak");
  while (1) {}
}
}

int main(int argc, char **argv) {
  asm volatile("vadd.vv v0, v1, v2");
  return 0;
}