Mike Izbicki <[email protected]> writes:
> Right, but I've never taken a look at the gcc codebase. Where would I
> start looking for the relevant files? Is there a general introduction
> to the codebase anywhere that I should start with?
grep for all the flags set in the two functions below (from gcc/opts.c),
without the x_ to catch all:
/* The following routines are useful in setting all the flags that
-ffast-math and -fno-fast-math imply. */
static void
set_fast_math_flags (struct gcc_options *opts, int set)
{
if (!opts->frontend_set_flag_unsafe_math_optimizations)
{
opts->x_flag_unsafe_math_optimizations = set;
set_unsafe_math_optimizations_flags (opts, set);
}
if (!opts->frontend_set_flag_finite_math_only)
opts->x_flag_finite_math_only = set;
if (!opts->frontend_set_flag_errno_math)
opts->x_flag_errno_math = !set;
if (set)
{
if (!opts->frontend_set_flag_signaling_nans)
opts->x_flag_signaling_nans = 0;
if (!opts->frontend_set_flag_rounding_math)
opts->x_flag_rounding_math = 0;
if (!opts->frontend_set_flag_cx_limited_range)
opts->x_flag_cx_limited_range = 1;
}
}
/* When -funsafe-math-optimizations is set the following
flags are set as well. */
static void
set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
{
if (!opts->frontend_set_flag_trapping_math)
opts->x_flag_trapping_math = !set;
if (!opts->frontend_set_flag_signed_zeros)
opts->x_flag_signed_zeros = !set;
if (!opts->frontend_set_flag_associative_math)
opts->x_flag_associative_math = set;
if (!opts->frontend_set_flag_reciprocal_math)
opts->x_flag_reciprocal_math = set;
}
--
[email protected] -- Speaking for myself only
