Syntax
.fmask mask offset
Description
The .fmask directive sets a mask with a bit turned on for each floating-point register that the current routine saved. The least-significant bit corresponds to register $f0. The offset is the distance in bytes from the virtual frame pointer to where the floating-point registers are saved.
You must use .ent before .fmask, and you can use only one .fmask for each .ent. Space should be allocated for those registers specified in the .fmask.