add floor (that doesn't work because of immediate) in Library
Merge branch 'master' of github.com:cpuex2014-4/compiler
fix bug
fix floor
add sin and cos in Library
add sin and cos in Library
fix floor
Merge branch 'lib' of github.com:cpuex2014-4/compiler into lib
fix bug around signFlag in sin and cos
Merge branch 'lib' of https://github.com/cpuex2014-4/compiler

Conflicts:
	library/library.s
rename library.s -> floatLib.s