     fp-scratch-reg 1 0 scratch@ STFD
     dst 1 4 scratch@ LWZ ;
 
-M: ppc %copy ( dst src -- ) MR ;
-
-M: ppc %copy-float ( dst src -- ) FMR ;
+M: ppc %copy ( dst src rep -- )
+    {
+        { int-rep [ MR ] }
+        { double-float-rep [ FMR ] }
+    } case ;
 
 M: ppc %unbox-float ( dst src -- ) float-offset LFD ;
 

M: int-regs param-regs drop { 3 4 5 6 7 8 9 10 } ;
M: float-regs return-reg drop 1 ;

M: int-regs %save-param-reg drop 1 rot local@ STW ;
M: int-regs %load-param-reg drop 1 rot local@ LWZ ;

M: single-float-rep %save-param-reg drop 1 rot local@ STFS ;
M: single-float-rep %load-param-reg 1 rot local@ LFS ;

M: double-float-rep %save-param-reg drop 1 rot local@ STFD ;
M: double-float-rep %load-param-reg 1 rot local@ LFD ;

M: stack-params %load-param-reg ( stack reg rep -- )
    drop [ 0 1 rot local@ LWZ 0 1 ] dip param@ STW ;

: next-param@ ( n -- x ) param@ stack-frame get total-size>> + ;

M: stack-params %save-param-reg ( stack reg rep -- )
    #! Funky. Read the parameter from the caller's stack frame.
    #! This word is used in callbacks
    drop
    [ 0 1 ] dip next-param@ LWZ
    [ 0 1 ] dip local@ STW ;

M: ppc %prepare-unbox ( -- )
    ! First parameter is top of stack

M: ppc %compare-imm-branch (%compare-imm) %branch ;
M: ppc %compare-float-branch (%compare-float) %branch ;

: load-from-frame ( dst n rep -- )
    {
        { int-rep [ [ 1 ] dip LWZ ] }
        { single-float-rep [ [ 1 ] dip LFS ] }
        { double-float-rep [ [ 1 ] dip LFD ] }
        { stack-params [ [ 0 1 ] dip LWZ [ 0 1 ] dip param@ STW ] }
    } case ;

: next-param@ ( n -- x ) param@ stack-frame get total-size>> + ;

: store-to-frame ( src n rep -- )
    {
        { int-rep [ [ 1 ] dip STW ] }
        { single-float-rep [ [ 1 ] dip STFS ] }
        { double-float-rep [ [ 1 ] dip STFD ] }
        { stack-params [ [ [ 0 1 ] dip next-param@ LWZ 0 1 ] dip STW ] }
    } case ;

M: ppc %spill ( src n rep -- )
    [ spill@ ] dip store-to-frame ;

M: ppc %reload ( dst n rep -- )
    [ spill@ ] dip load-from-frame ;

M: ppc %loop-entry ;

