Mesa (main): pan/va: Add disassembler test harness

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Module: Mesa
Branch: main
Commit: b2046750c4a7f6d5ef4a50e4765f382a0e74aa0d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b2046750c4a7f6d5ef4a50e4765f382a0e74aa0d

Author: Alyssa Rosenzweig <alyssa at collabora.com>
Date:   Fri Jul 16 13:22:27 2021 -0400

pan/va: Add disassembler test harness

Uses the same set of cases. This is a standalone C program because the
easy way of hooking into the disassembler from Python with subprocesses
was slow. This seems cleaner anyway.

Signed-off-by: Alyssa Rosenzweig <alyssa at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12025>

---

 .../bifrost/valhall/test/test-disassembler.c       | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)

diff --git a/src/panfrost/bifrost/valhall/test/test-disassembler.c b/src/panfrost/bifrost/valhall/test/test-disassembler.c
new file mode 100644
index 00000000000..36271d8a45d
--- /dev/null
+++ b/src/panfrost/bifrost/valhall/test/test-disassembler.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2021 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include "disassemble.h"
+
+static inline uint8_t
+parse_nibble(const char c)
+{
+   return (c >= 'a') ? 10 + (c - 'a') : (c - '0');
+}
+
+/* Given a little endian 8 byte hexdump, parse out the 64-bit value */
+static uint64_t
+parse_hex(const char *in)
+{
+   uint64_t v = 0;
+
+   for (unsigned i = 0; i < 8; ++i) {
+      uint8_t byte = (parse_nibble(in[0]) << 4) | parse_nibble(in[1]);
+      v |= ((uint64_t) byte) << (8 * i);
+
+      /* Skip the space after the byte */
+      in += 3;
+   }
+
+   return v;
+}
+
+int
+main(int argc, const char **argv)
+{
+   if (argc < 2) {
+      fprintf(stderr, "Expected case list\n");
+      return 1;
+   }
+
+   FILE *fp = fopen(argv[1], "r");
+
+   if (fp == NULL) {
+      fprintf(stderr, "Could not open the case list");
+      return 1;
+   }
+
+   char line[128];
+   unsigned nr_fail = 0, nr_pass = 0;
+
+   while (fgets(line, sizeof(line), fp) != NULL) {
+      char *output = NULL;
+      size_t sz = 0;
+      size_t len = strlen(line);
+
+      /* Skip empty lines */
+      if (len <= 1)
+         continue;
+
+      /* Check for buffer overflow */
+      if (len < 28) {
+         fprintf(stderr, "Invalid reference %s\n", line);
+         nr_fail++;
+      }
+
+      uint64_t bin = parse_hex(line);
+      FILE *outputp = open_memstream(&output, &sz);
+      va_disasm_instr(outputp, bin);
+      fprintf(outputp, "\n");
+      fclose(outputp);
+
+      /* Skip hexdump: 8 bytes * (2 nibbles + 1 space) + 3 spaces */
+      const char *reference = line + 27;
+      bool fail = strcmp(reference, output);
+
+      if (fail) {
+         printf("Got %sExpected %s\n", output, reference);
+         nr_fail++;
+      } else {
+         nr_pass++;
+      }
+
+      free(output);
+   }
+
+   printf("Passed %u/%u tests.\n", nr_pass, nr_pass + nr_fail);
+   fclose(fp);
+
+   return nr_fail ? 1 : 0;
+}