riscv: [Patch 8/5] Added some regression tests to RISC-V

This patch is the eighth patch in a series adding RISC-V to gem5, and
third of the bonus patches to the original series of five. It adds some
regression tests to RISC-V.

Regression tests included:
- se/00.hello
- se/02.insttest (split into several binaries which are not included due
  to large size)

The tests added to 00.insttest will need to be build manually; to
facilitate this, a Makefile is included. The required toolchain and
compiler (riscv64-unknown-elf-gcc) can be built from the riscv-tools
GitHub repository at https://github.com/riscv/riscv-tools.

Note that because EBREAK only makes sense when gdb is running or while in
FS mode, it is not included in the linux-rv64i insttest. ERET is not
included because it does not make sense in SE mode and, in fact, causes
a panic by design.

Note also that not every system call is tested in linux-rv64i; of the ones
defined in linux/process.hh, some have been given numbers but not
definitions for the toolchain, or are merely stubs that always return 0. Of
the ones that do work properly, only a subset are tested due to similar
functionality.

Signed-off by: Alec Roelke

Signed-off by: Jason Lowe-Power <jason@lowepower.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/tests/test-progs/insttest/src/riscv/insttest.h b/tests/test-progs/insttest/src/riscv/insttest.h
new file mode 100644
index 000000000..59b69869c
--- /dev/null
+++ b/tests/test-progs/insttest/src/riscv/insttest.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2016 The University of Virginia
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Alec Roelke
+ */
+
+#pragma once
+
+#include <cmath>
+#include <cstdlib>
+#include <functional>
+#include <iostream>
+#include <string>
+
+#define IOP(inst, rd, rs1, imm) \
+    asm volatile(inst " %0,%1,%2" : "=r" (rd) : "r" (rs1), "i" (imm))
+
+#define ROP(inst, rd, rs1, rs2) \
+    asm volatile(inst " %0,%1,%2" : "=r" (rd) : "r" (rs1), "r" (rs2))
+
+#define FROP(inst, fd, fs1, fs2) \
+    asm volatile(inst " %0,%1,%2" : "=f" (fd) : "f" (fs1), "f" (fs2))
+
+#define FR4OP(inst, fd, fs1, fs2, fs3) \
+    asm volatile(inst " %0,%1,%2,%3" \
+            : "=f" (fd) \
+            : "f" (fs1), "f" (fs2), "f" (fs3))
+
+template<typename A, typename B> std::ostream&
+operator<<(std::ostream& os, const std::pair<A, B>& p)
+{
+    return os << '(' << p.first << ", " << p.second << ')';
+}
+
+namespace insttest
+{
+
+template<typename T> void
+expect(const T& expected, std::function<T()> func,
+        const std::string& test)
+{
+    using namespace std;
+
+    T result = func();
+    cout << test << ": ";
+    if (result == expected) {
+        cout << "PASS" << endl;
+    } else {
+        cout << "\033[1;31mFAIL\033[0m (expected " << expected << "; found " <<
+            result << ")" << endl;
+        exit(1);
+    }
+}
+
+} // namespace insttest