etnaviv: isa: Add cli assembler

Nothing too fancy.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28869>

src/etnaviv/isa/assembler.c

@@ -0,0 +1,127 @@
+/*
+ * Copyright © 2024 Igalia S.L.
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "asm.h"
+#include "isa.h"
+
+#include "util/u_dynarray.h"
+
+#include <etnaviv/isa/etnaviv-isa.h>
+
+struct encoded_instr {
+   uint32_t word[4];
+};
+
+static void
+pre_instr_cb(void *d, unsigned n, void *instr)
+{
+   uint32_t *dwords = (uint32_t *)instr;
+   printf("%03d [%08x %08x %08x %08x] ", n, dwords[0], dwords[1], dwords[2], dwords[3]);
+}
+
+static void
+store(const char *filename, void *data, unsigned size)
+{
+   int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+   if (fd == -1) {
+      fprintf(stderr, "Error opening file (%s)", filename);
+      return;
+   }
+
+   ssize_t bytes_written = write(fd, data, size);
+   if (bytes_written == -1) {
+      fprintf(stderr, "Error writing to file");
+      close(fd);
+      return;
+   }
+
+   close(fd);
+}
+
+static void
+print_usage()
+{
+   printf("Usage: etnaviv-assembler -i FILE -o FILE -s\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+   bool show_disasm = false;
+   bool dual_16_mode = false;
+   const char *in = NULL;
+   const char *out = NULL;
+
+   int opt = 0;
+   while ((opt = getopt(argc, argv, "i:o:sd")) != -1) {
+      switch (opt) {
+      case 'i':
+         in = optarg;
+         break;
+      case 'o':
+         out = optarg;
+         break;
+      case 's':
+         show_disasm = true;
+         break;
+      case 'd':
+         dual_16_mode = true;
+         break;
+      default:
+         print_usage();
+         exit(EXIT_FAILURE);
+      }
+   }
+
+   if (!in || !out) {
+      print_usage();
+
+      return EXIT_FAILURE;
+   }
+
+   struct etna_asm_result *result = isa_parse_file(in, dual_16_mode);
+
+   if (!result->success) {
+      fprintf(stderr, "Failed to parse %s\n%s\n", in, result->error);
+      isa_asm_result_destroy(result);
+
+      return EXIT_FAILURE;
+   }
+
+   struct util_dynarray bin;
+   util_dynarray_init(&bin, NULL);
+
+   for (unsigned int i = 0; i < result->num_instr; i++) {
+      struct encoded_instr encoded;
+
+      isa_assemble_instruction(encoded.word, &result->instr[i]);
+      util_dynarray_append(&bin, struct encoded_instr, encoded);
+   }
+
+   unsigned int num = util_dynarray_num_elements(&bin, struct encoded_instr);
+   unsigned int size = num * sizeof(struct encoded_instr);
+   void *data = util_dynarray_begin(&bin);
+
+   store(out, data, size);
+
+   if (show_disasm) {
+      static struct isa_decode_options options = {
+         .show_errors = true,
+         .branch_labels = true,
+         .pre_instr_cb = pre_instr_cb,
+      };
+
+      etnaviv_isa_disasm(data, size, stdout, &options);
+   }
+
+   util_dynarray_fini(&bin);
+
+   return EXIT_SUCCESS;
+}

src/etnaviv/isa/meson.build

@@ -173,6 +173,13 @@ if with_tools.contains('etnaviv')
     link_with: [_libetnaviv_isa_bindings_gen, _libetnaviv_isa_proc_rs],
   )
 
+  etnaviv_assembler = executable(
+    'etnaviv-assembler',
+    ['assembler.c'],
+    gnu_symbol_visibility: 'hidden',
+    dependencies: [ idep_libetnaviv_decode ],
+    link_with: [libetnaviv_encode, libetnaviv_isa_rs],
+  )
 endif
 
 subdir('tests')