commit f68b80717efec2ccf4c181c9a3fc4184fde27be1
Author: Jason S. McMullan <jason.mcmullan@netronome.com>
Date:   Sun Oct 10 00:38:26 2010 -0400

    [m68k-amiga] Amiga ABI support
    
    Moves the FP to A5, doubling up with the PIC
    Breaks all -fpic modes.
    
    NOT FOR UPSTREAM: This breaks *all* other m68k APIs!!!
    
    Signed-off-by: Jason S. McMullan <jason.mcmullan@netronome.com>

diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c
index c22f3b8..9718ccb 100644
--- a/gcc/config/m68k/m68k.c
+++ b/gcc/config/m68k/m68k.c
@@ -920,7 +920,7 @@ m68k_initial_elimination_offset (int from, int to)
 static bool
 m68k_save_reg (unsigned int regno, bool interrupt_handler)
 {
-  if (flag_pic && regno == PIC_REG)
+  if (flag_pic && regno == A5_REG)
     {
       if (crtl->saves_all_registers)
 	return true;
@@ -2186,7 +2186,7 @@ static rtx
 m68k_get_gp (void)
 {
   if (pic_offset_table_rtx == NULL_RTX)
-    pic_offset_table_rtx = gen_rtx_REG (Pmode, PIC_REG);
+    pic_offset_table_rtx = gen_rtx_REG (Pmode, A5_REG);
 
   crtl->uses_pic_offset_table = 1;
 
@@ -4640,7 +4640,7 @@ m68k_delegitimize_address (rtx orig_x)
   if (GET_CODE (x) == PLUS
       && GET_CODE (XEXP (x, 1)) == CONST
       && REG_P (XEXP (x, 0))
-      && REGNO (XEXP (x, 0)) == PIC_REG)
+      && REGNO (XEXP (x, 0)) == A5_REG)
     {
       y = x = XEXP (XEXP (x, 1), 0);
 
@@ -5145,7 +5145,7 @@ m68k_output_mi_thunk (FILE *file, tree thunk ATTRIBUTE_UNUSED,
 
   /* Restore the original PIC register.  */
   if (flag_pic)
-    SET_REGNO (pic_offset_table_rtx, PIC_REG);
+    SET_REGNO (pic_offset_table_rtx, A5_REG);
 }
 
 /* Worker function for TARGET_STRUCT_VALUE_RTX.  */
diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h
index 5787e8a..1d36a63 100644
--- a/gcc/config/m68k/m68k.h
+++ b/gcc/config/m68k/m68k.h
@@ -348,7 +348,7 @@ along with GCC; see the file COPYING3.  If not see
 #define PIC_OFFSET_TABLE_REGNUM				\
   (!flag_pic ? INVALID_REGNUM				\
    : reload_completed ? REGNO (pic_offset_table_rtx)	\
-   : PIC_REG)
+   : A5_REG)
 
 /* 1 for registers that have pervasive standard uses
    and are not available for the register allocator.
@@ -416,7 +416,7 @@ along with GCC; see the file COPYING3.  If not see
 	  fixed_regs[i] = call_used_regs[i] = 1;		\
     }								\
   if (flag_pic)							\
-    fixed_regs[PIC_REG] = call_used_regs[PIC_REG] = 1;		\
+    fixed_regs[A5_REG] = call_used_regs[A5_REG] = 1;		\
 }
 
 /* On the m68k, ordinary registers hold 32 bits worth;
@@ -453,7 +453,7 @@ along with GCC; see the file COPYING3.  If not see
 /* Most m68k targets use %a6 as a frame pointer.  The AmigaOS
    ABI uses %a6 for shared library calls, therefore the frame
    pointer is shifted to %a5 on this target.  */
-#define FRAME_POINTER_REGNUM A6_REG
+#define FRAME_POINTER_REGNUM A5_REG
 
 /* Base register for access to arguments of the function.
  * This isn't a hardware register. It will be eliminated to the
diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md
index f89037f..9f3da5a 100644
--- a/gcc/config/m68k/m68k.md
+++ b/gcc/config/m68k/m68k.md
@@ -131,7 +131,7 @@
   [(D0_REG		0)
    (A0_REG		8)
    (A1_REG		9)
-   (PIC_REG		13)
+   (A5_REG		13)
    (A6_REG		14)
    (SP_REG		15)
    (FP0_REG		16)
@@ -7295,7 +7295,7 @@
 {
   if (TARGET_ID_SHARED_LIBRARY)
     {
-      operands[1] = gen_rtx_REG (Pmode, PIC_REG);
+      operands[1] = gen_rtx_REG (Pmode, A5_REG);
       return MOTOROLA ? "move.l %?(%1),%0" : "movel %1@(%?), %0";
     }
   else if (MOTOROLA)