https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66509
--- Comment #13 from Jack Howarth <howarth.at.gcc at gmail dot com> --- Also confirmed that using the modified tests of... filds (%ebp); fists (%ebp) and fildq (%ebp); fistpq (%ebp) allow the GNU legacy assembler from Xcode 6.2 (Apple Inc version cctools-862, GNU assembler version 1.38) to pass these two gcc/configure tests at both -m32/-m64.