freedreno/afuc: Disable the disassembler on 32-bit builds.

There's an mmap(2 << 32), which armhf can't handle.

Fixes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5514
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13421>

src/freedreno/afuc/meson.build

@@ -18,6 +18,10 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+if with_tests
+  diff = find_program('diff')
+endif
+
 afuc_parser = custom_target(
   'parser.[ch]',
   input: 'parser.y',
@@ -55,50 +59,7 @@ asm = executable(
   build_by_default : with_tools.contains('freedreno'),
   install: install_fd_decode_tools,
 )
-
-disasm = executable(
-  'afuc-disasm',
-  [
-    'disasm.c',
-    'emu.c',
-    'emu.h',
-    'emu-ds.c',
-    'emu-regs.c',
-    'emu-ui.c',
-    'util.c',
-    'util.h',
-  ],
-  include_directories: [
-    inc_freedreno,
-    inc_freedreno_rnn,
-    inc_include,
-    inc_src,
-    inc_util,
-  ],
-  link_with: [
-    libfreedreno_rnn,
-  ],
-  dependencies: [
-  ],
-  build_by_default : with_tools.contains('freedreno'),
-  install: install_fd_decode_tools,
-)
-
 if with_tests
-  diff = find_program('diff')
-
-  disasm_fw = custom_target('afuc_test.asm',
-    output: 'afuc_test.asm',
-    command: [disasm, '-u', files('../.gitlab-ci/reference/afuc_test.fw'), '-g', '630'],
-    capture: true
-  )
-  test('afuc-disasm',
-    diff,
-    args: ['-u', files('../.gitlab-ci/reference/afuc_test.asm'), disasm_fw],
-    suite: 'freedreno',
-    workdir: meson.source_root()
-  )
-
   asm_fw = custom_target('afuc_test.fw',
     output: 'afuc_test.fw',
     command: [asm, '-g', '6', files('../.gitlab-ci/traces/afuc_test.asm'), '@OUTPUT@'],
@@ -110,3 +71,48 @@ if with_tests
     workdir: meson.source_root()
   )
 endif
+
+# Disasm requires mmaping >4GB
+if cc.sizeof('size_t') > 4
+  disasm = executable(
+    'afuc-disasm',
+    [
+      'disasm.c',
+      'emu.c',
+      'emu.h',
+      'emu-ds.c',
+      'emu-regs.c',
+      'emu-ui.c',
+      'util.c',
+      'util.h',
+    ],
+    include_directories: [
+      inc_freedreno,
+      inc_freedreno_rnn,
+      inc_include,
+      inc_src,
+      inc_util,
+    ],
+    link_with: [
+      libfreedreno_rnn,
+    ],
+    dependencies: [
+    ],
+    build_by_default : with_tools.contains('freedreno'),
+    install: install_fd_decode_tools,
+  )
+
+  if with_tests
+    disasm_fw = custom_target('afuc_test.asm',
+      output: 'afuc_test.asm',
+      command: [disasm, '-u', files('../.gitlab-ci/reference/afuc_test.fw'), '-g', '630'],
+      capture: true
+    )
+    test('afuc-disasm',
+      diff,
+      args: ['-u', files('../.gitlab-ci/reference/afuc_test.asm'), disasm_fw],
+      suite: 'freedreno',
+      workdir: meson.source_root()
+    )
+  endif
+endif