diff options
Diffstat (limited to 'scripts/gen-as-const.py')
| -rw-r--r-- | scripts/gen-as-const.py | 64 |
1 files changed, 35 insertions, 29 deletions
diff --git a/scripts/gen-as-const.py b/scripts/gen-as-const.py index cabf401ed1..eb85ef1aa0 100644 --- a/scripts/gen-as-const.py +++ b/scripts/gen-as-const.py @@ -34,28 +34,28 @@ def compute_c_consts(sym_data, cc): """Compute the values of some C constants. The first argument is a list whose elements are either strings - (preprocessor directives) or pairs of strings (a name and a C + (preprocessor directives, or the special string 'START' to + indicate this function should insert its initial boilerplate text + in the output there) or pairs of strings (a name and a C expression for the corresponding value). Preprocessor directives in the middle of the list may be used to select which constants end up being evaluated using which expressions. """ out_lines = [] - started = False for arg in sym_data: if isinstance(arg, str): - out_lines.append(arg) + if arg == 'START': + out_lines.append('void\ndummy (void)\n{') + else: + out_lines.append(arg) continue name = arg[0] value = arg[1] - if not started: - out_lines.append('void\ndummy (void)\n{') - started = True out_lines.append('asm ("@@@name@@@%s@@@value@@@%%0@@@end@@@" ' ': : \"i\" ((long int) (%s)));' % (name, value)) - if started: - out_lines.append('}') + out_lines.append('}') out_lines.append('') out_text = '\n'.join(out_lines) with tempfile.TemporaryDirectory() as temp_dir: @@ -89,32 +89,32 @@ def gen_test(sym_data): """ out_lines = [] - started = False for arg in sym_data: if isinstance(arg, str): - out_lines.append(arg) + if arg == 'START': + out_lines.append('#include <stdint.h>\n' + '#include <stdio.h>\n' + '#include <bits/wordsize.h>\n' + '#if __WORDSIZE == 64\n' + 'typedef uint64_t c_t;\n' + '# define U(n) UINT64_C (n)\n' + '#else\n' + 'typedef uint32_t c_t;\n' + '# define U(n) UINT32_C (n)\n' + '#endif\n' + 'static int\n' + 'do_test (void)\n' + '{\n' + # Compilation test only, using static + # assertions. + ' return 0;\n' + '}\n' + '#include <support/test-driver.c>') + else: + out_lines.append(arg) continue name = arg[0] value = arg[1] - if not started: - out_lines.append('#include <stdint.h>\n' - '#include <stdio.h>\n' - '#include <bits/wordsize.h>\n' - '#if __WORDSIZE == 64\n' - 'typedef uint64_t c_t;\n' - '# define U(n) UINT64_C (n)\n' - '#else\n' - 'typedef uint32_t c_t;\n' - '# define U(n) UINT32_C (n)\n' - '#endif\n' - 'static int\n' - 'do_test (void)\n' - '{\n' - # Compilation test only, using static assertions. - ' return 0;\n' - '}\n' - '#include <support/test-driver.c>') - started = True out_lines.append('_Static_assert (U (asconst_%s) == (c_t) (%s), ' '"value of %s");' % (name, value, name)) @@ -134,6 +134,7 @@ def main(): args = parser.parse_args() sym_data = [] with open(args.sym_file, 'r') as sym_file: + started = False for line in sym_file: line = line.strip() if line == '': @@ -143,12 +144,17 @@ def main(): sym_data.append(line) continue words = line.split(maxsplit=1) + if not started: + sym_data.append('START') + started = True # Separator. if words[0] == '--': continue name = words[0] value = words[1] if len(words) > 1 else words[0] sym_data.append((name, value)) + if not started: + sym_data.append('START') if args.test: print(gen_test(sym_data)) else: |