diff options
Diffstat (limited to 'gcc/c-family/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-family/c-cppbuiltin.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c index a47473534b5..411ca194ada 100644 --- a/gcc/c-family/c-cppbuiltin.c +++ b/gcc/c-family/c-cppbuiltin.c @@ -944,6 +944,20 @@ c_cpp_builtins (cpp_reader *pfile) /* For libgcc-internal use only. */ if (flag_building_libgcc) { + /* Properties of floating-point modes for libgcc2.c. */ + for (enum machine_mode mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); + mode != VOIDmode; + mode = GET_MODE_WIDER_MODE (mode)) + { + const char *name = GET_MODE_NAME (mode); + char *macro_name + = (char *) alloca (strlen (name) + + sizeof ("__LIBGCC__MANT_DIG__")); + sprintf (macro_name, "__LIBGCC_%s_MANT_DIG__", name); + builtin_define_with_int_value (macro_name, + REAL_MODE_FORMAT (mode)->p); + } + /* For libgcc crtstuff.c and libgcc2.c. */ builtin_define_with_int_value ("__LIBGCC_EH_TABLES_CAN_BE_READ_ONLY__", EH_TABLES_CAN_BE_READ_ONLY); |