added more asm macros for floating point subtraction of single/double/quad
added more asm macros for floating point subtraction of single/double/quad

svn path=/trunk/mono/; revision=17394

linkotec/mono_arch,linkotec/mono_arch,biotrump/ffts-tec,biotrump/ffts-tec,biotrump/ffts-tec,linkotec/mono_arch,biotrump/ffts-tec