Loads the contents of the Floating-Point Status and Control Register into a floating-point register and fills the upper 32 bits with ones.
The mffs instruction places the contents of the Floating-Point Status and Control Register into bits 32-63 of floating-point register (FPR) FRT. The bits 0-31 of floating-point register FRT are undefined.
The mffs instruction has two syntax forms. Each syntax form has a different effect on Condition Register Field 1.
|Syntax Form||FPSCR bits||Record Bit (Rc)||Condition Register Field 1|
|mffs.||None||1||FX, FEX, VX, OX|
The two syntax forms of the mffs instruction never affect the Floating-Point Status and Control Register fields. If the syntax form sets the Record (Rc) bit to 1, the instruction affects the Floating-Point Exception (FX), Floating-Point Enabled Exception (FEX), Floating Invalid Operation Exception (VX), and Floating-Point Overflow Exception (OX) bits in Condition Register Field 1.
|FRT||Specifies target floating-point register where result of operation is stored.|
The following code loads the contents of the Floating-Point Status and Control Register into FPR 14, and fills the upper 32 bits of that register with ones:
# Assume FPSCR contains 0x0000 0000. mffs 14 # FPR 14 now contains 0xFFFF FFFF 0000 0000.
Interpreting the Contents of a Floating-Point Register.
Functional Differences for POWER and PowerPC Instructions.