diff options
Diffstat (limited to 'gdb/i387-tdep.c')
| -rw-r--r-- | gdb/i387-tdep.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/gdb/i387-tdep.c b/gdb/i387-tdep.c index 20e446d2ff4..f56b3d01a3a 100644 --- a/gdb/i387-tdep.c +++ b/gdb/i387-tdep.c @@ -166,8 +166,22 @@ static void print_i387_value (char *raw) { DOUBLEST value; - - floatformat_to_doublest (&floatformat_i387_ext, raw, &value); + + /* Avoid call to floatformat_to_doublest if possible to preserve as + much information as possible. */ + +#ifdef HAVE_LONG_DOUBLE + if (sizeof (value) == sizeof (long double) + && HOST_LONG_DOUBLE_FORMAT == &floatformat_i387_ext) + { + /* Copy straight over, but take care of the padding. */ + memcpy (&value, raw, FPU_REG_RAW_SIZE); + memset ((char *) &value + FPU_REG_RAW_SIZE, 0, + sizeof (value) - FPU_REG_RAW_SIZE); + } + else +#endif + floatformat_to_doublest (&floatformat_i387_ext, raw, &value); /* We try to print 19 digits. The last digit may or may not contain garbage, but we'd better print one too many. We need enough room |