Floating Point Instructions
MOTOROLA M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL 5-135
FSUB Floating-Point Subtract FSUB
(MC6888X, MC68040)
Destination Register field—Specifies the destination floating- point data register.
Opmode field—Specifies the instruction and rounding precision.
0101000 FSUB Rounding precision specified by the floating- point
control register.
1101000 FSSUB Single-precision rounding specified.
1101100 FDSUB Double-precision rounding specified.
Commenti su questo manuale