--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/pdp11/pdp11.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,1063 @@
+/* Definitions of target machine for GNU compiler, for the pdp-11
+   Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005,
+   2006, 2007, 2008 Free Software Foundation, Inc.
+   Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#define CONSTANT_POOL_BEFORE_FUNCTION	0
+
+/* check whether load_fpu_reg or not */
+#define LOAD_FPU_REG_P(x) ((x)>=8 && (x)<=11)
+#define NO_LOAD_FPU_REG_P(x) ((x)==12 || (x)==13)
+#define FPU_REG_P(x)	(LOAD_FPU_REG_P(x) || NO_LOAD_FPU_REG_P(x))
+#define CPU_REG_P(x)	((x)<8)
+
+/* Names to predefine in the preprocessor for this target machine.  */
+
+#define TARGET_CPU_CPP_BUILTINS()		\
+  do						\
+    {						\
+      builtin_define_std ("pdp11");		\
+    }						\
+  while (0)
+
+/* Print subsidiary information on the compiler version in use.  */
+#define TARGET_VERSION fprintf (stderr, " (pdp11)");
+
+
+/* Generate DBX debugging information.  */
+
+/* #define DBX_DEBUGGING_INFO */
+
+#define TARGET_40_PLUS		(TARGET_40 || TARGET_45)
+#define TARGET_10		(! TARGET_40_PLUS)
+
+#define TARGET_UNIX_ASM_DEFAULT	0
+
+#define ASSEMBLER_DIALECT	(TARGET_UNIX_ASM ? 1 : 0)
+
+
+
+/* TYPE SIZES */
+#define SHORT_TYPE_SIZE		16
+#define INT_TYPE_SIZE		(TARGET_INT16 ? 16 : 32)
+#define LONG_TYPE_SIZE		32
+#define LONG_LONG_TYPE_SIZE	64     
+
+/* if we set FLOAT_TYPE_SIZE to 32, we could have the benefit 
+   of saving core for huge arrays - the definitions are 
+   already in md - but floats can never reside in 
+   an FPU register - we keep the FPU in double float mode 
+   all the time !! */
+#define FLOAT_TYPE_SIZE		(TARGET_FLOAT32 ? 32 : 64)
+#define DOUBLE_TYPE_SIZE	64
+#define LONG_DOUBLE_TYPE_SIZE	64
+
+/* machine types from ansi */
+#define SIZE_TYPE "unsigned int" 	/* definition of size_t */
+#define WCHAR_TYPE "int" 		/* or long int???? */
+#define WCHAR_TYPE_SIZE 16
+
+#define PTRDIFF_TYPE "int"
+
+/* target machine storage layout */
+
+/* Define this if most significant bit is lowest numbered
+   in instructions that operate on numbered bit-fields.  */
+#define BITS_BIG_ENDIAN 0
+
+/* Define this if most significant byte of a word is the lowest numbered.  */
+#define BYTES_BIG_ENDIAN 0
+
+/* Define this if most significant word of a multiword number is first.  */
+#define WORDS_BIG_ENDIAN 1
+
+/* Define that floats are in VAX order, not high word first as for ints.  */
+#define FLOAT_WORDS_BIG_ENDIAN 0
+
+/* Width of a word, in units (bytes). 
+
+   UNITS OR BYTES - seems like units */
+#define UNITS_PER_WORD 2
+
+/* This machine doesn't use IEEE floats.  */
+/* Because the pdp11 (at least Unix) convention for 32-bit ints is
+   big endian, opposite for what you need for float, the vax float
+   conversion routines aren't actually used directly.  But the underlying
+   format is indeed the vax/pdp11 float format.  */
+extern const struct real_format pdp11_f_format;
+extern const struct real_format pdp11_d_format;
+
+/* Maximum sized of reasonable data type 
+   DImode or Dfmode ...*/
+#define MAX_FIXED_MODE_SIZE 64	
+
+/* Allocation boundary (in *bits*) for storing pointers in memory.  */
+#define POINTER_BOUNDARY 16
+
+/* Allocation boundary (in *bits*) for storing arguments in argument list.  */
+#define PARM_BOUNDARY 16
+
+/* Boundary (in *bits*) on which stack pointer should be aligned.  */
+#define STACK_BOUNDARY 16
+
+/* Allocation boundary (in *bits*) for the code of a function.  */
+#define FUNCTION_BOUNDARY 16
+
+/* Alignment of field after `int : 0' in a structure.  */
+#define EMPTY_FIELD_BOUNDARY 16
+
+/* No data type wants to be aligned rounder than this.  */
+#define BIGGEST_ALIGNMENT 16
+
+/* Define this if move instructions will actually fail to work
+   when given unaligned data.  */
+#define STRICT_ALIGNMENT 1
+
+/* Standard register usage.  */
+
+/* Number of actual hardware registers.
+   The hardware registers are assigned numbers for the compiler
+   from 0 to just below FIRST_PSEUDO_REGISTER.
+   All registers that the compiler knows about must be given numbers,
+   even those that are not normally considered general registers.
+
+   we have 8 integer registers, plus 6 float 
+   (don't use scratch float !) */
+
+#define FIRST_PSEUDO_REGISTER 14
+
+/* 1 for registers that have pervasive standard uses
+   and are not available for the register allocator.
+
+   On the pdp, these are:
+   Reg 7	= pc;
+   reg 6	= sp;
+   reg 5	= fp;  not necessarily! 
+*/
+
+/* don't let them touch fp regs for the time being !*/
+
+#define FIXED_REGISTERS  \
+{0, 0, 0, 0, 0, 0, 1, 1, \
+ 0, 0, 0, 0, 0, 0     }
+
+
+
+/* 1 for registers not available across function calls.
+   These must include the FIXED_REGISTERS and also any
+   registers that can be used without being saved.
+   The latter must include the registers where values are returned
+   and the register where structure-value addresses are passed.
+   Aside from that, you can include as many other registers as you like.  */
+
+/* don't know about fp */
+#define CALL_USED_REGISTERS  \
+{1, 1, 0, 0, 0, 0, 1, 1, \
+ 0, 0, 0, 0, 0, 0 }
+
+
+/* Make sure everything's fine if we *don't* have an FPU.
+   This assumes that putting a register in fixed_regs will keep the
+   compiler's mitts completely off it.  We don't bother to zero it out
+   of register classes.  Also fix incompatible register naming with
+   the UNIX assembler.
+*/
+#define CONDITIONAL_REGISTER_USAGE \
+{ 						\
+  int i; 					\
+  HARD_REG_SET x; 				\
+  if (!TARGET_FPU)				\
+    { 						\
+      COPY_HARD_REG_SET (x, reg_class_contents[(int)FPU_REGS]); \
+      for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
+       if (TEST_HARD_REG_BIT (x, i)) 		\
+	fixed_regs[i] = call_used_regs[i] = 1; 	\
+    } 						\
+						\
+  if (TARGET_AC0)				\
+      call_used_regs[8] = 1;			\
+  if (TARGET_UNIX_ASM)				\
+    {						\
+      /* Change names of FPU registers for the UNIX assembler.  */ \
+      reg_names[8] = "fr0";			\
+      reg_names[9] = "fr1";			\
+      reg_names[10] = "fr2";			\
+      reg_names[11] = "fr3";			\
+      reg_names[12] = "fr4";			\
+      reg_names[13] = "fr5";			\
+    }						\
+}
+
+/* Return number of consecutive hard regs needed starting at reg REGNO
+   to hold something of mode MODE.
+   This is ordinarily the length in words of a value of mode MODE
+   but can be less for certain modes in special long registers.
+*/
+
+#define HARD_REGNO_NREGS(REGNO, MODE)   \
+((REGNO < 8)?								\
+    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)	\
+    :1)
+    
+
+/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
+   On the pdp, the cpu registers can hold any mode - check alignment
+
+   FPU can only hold DF - simplifies life!
+*/
+#define HARD_REGNO_MODE_OK(REGNO, MODE) \
+(((REGNO) < 8)?						\
+  ((GET_MODE_BITSIZE(MODE) <= 16) 			\
+   || (GET_MODE_BITSIZE(MODE) == 32 && !((REGNO) & 1)))	\
+  :(MODE) == DFmode)
+    
+
+/* Value is 1 if it is a good idea to tie two pseudo registers
+   when one has mode MODE1 and one has mode MODE2.
+   If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
+   for any hard reg, then this must be 0 for correct output.  */
+#define MODES_TIEABLE_P(MODE1, MODE2) 0
+
+/* Specify the registers used for certain standard purposes.
+   The values of these macros are register numbers.  */
+
+/* the pdp11 pc overloaded on a register that the compiler knows about.  */
+#define PC_REGNUM  7
+
+/* Register to use for pushing function arguments.  */
+#define STACK_POINTER_REGNUM 6
+
+/* Base register for access to local variables of the function.  */
+#define FRAME_POINTER_REGNUM 5
+
+/* Value should be nonzero if functions must have frame pointers.
+   Zero means the frame pointer need not be set up (and parms
+   may be accessed via the stack pointer) in functions that seem suitable.
+   This is computed in `reload', in reload1.c.
+  */
+
+#define FRAME_POINTER_REQUIRED 0
+
+/* Base register for access to arguments of the function.  */
+#define ARG_POINTER_REGNUM 5
+
+/* Register in which static-chain is passed to a function.  */
+/* ??? - i don't want to give up a reg for this! */
+#define STATIC_CHAIN_REGNUM 4
+
+/* Define the classes of registers for register constraints in the
+   machine description.  Also define ranges of constants.
+
+   One of the classes must always be named ALL_REGS and include all hard regs.
+   If there is more than one class, another class must be named NO_REGS
+   and contain no registers.
+
+   The name GENERAL_REGS must be the name of a class (or an alias for
+   another name such as ALL_REGS).  This is the class of registers
+   that is allowed by "g" or "r" in a register constraint.
+   Also, registers outside this class are allocated only when
+   instructions express preferences for them.
+
+   The classes must be numbered in nondecreasing order; that is,
+   a larger-numbered class must never be contained completely
+   in a smaller-numbered class.
+
+   For any two classes, it is very desirable that there be another
+   class that represents their union.  */
+   
+/* The pdp has a couple of classes:
+
+MUL_REGS are used for odd numbered regs, to use in 16-bit multiplication
+         (even numbered do 32-bit multiply)
+LMUL_REGS long multiply registers (even numbered regs )
+	  (don't need them, all 32-bit regs are even numbered!)
+GENERAL_REGS is all cpu
+LOAD_FPU_REGS is the first four cpu regs, they are easier to load
+NO_LOAD_FPU_REGS is ac4 and ac5, currently - difficult to load them
+FPU_REGS is all fpu regs 
+*/
+
+enum reg_class { NO_REGS, MUL_REGS, GENERAL_REGS, LOAD_FPU_REGS, NO_LOAD_FPU_REGS, FPU_REGS, ALL_REGS, LIM_REG_CLASSES };
+
+#define N_REG_CLASSES (int) LIM_REG_CLASSES
+
+/* have to allow this till cmpsi/tstsi are fixed in a better way !! */
+#define SMALL_REGISTER_CLASSES 1
+
+/* Since GENERAL_REGS is the same class as ALL_REGS,
+   don't give it a different class number; just make it an alias.  */
+
+/* #define GENERAL_REGS ALL_REGS */
+
+/* Give names of register classes as strings for dump file.  */
+
+#define REG_CLASS_NAMES {"NO_REGS", "MUL_REGS", "GENERAL_REGS", "LOAD_FPU_REGS", "NO_LOAD_FPU_REGS", "FPU_REGS", "ALL_REGS" }
+
+/* Define which registers fit in which classes.
+   This is an initializer for a vector of HARD_REG_SET
+   of length N_REG_CLASSES.  */
+
+#define REG_CLASS_CONTENTS {{0}, {0x00aa}, {0x00ff}, {0x0f00}, {0x3000}, {0x3f00}, {0x3fff}}
+
+/* The same information, inverted:
+   Return the class number of the smallest class containing
+   reg number REGNO.  This could be a conditional expression
+   or could index an array.  */
+
+#define REGNO_REG_CLASS(REGNO) 		\
+((REGNO)>=8?((REGNO)<=11?LOAD_FPU_REGS:NO_LOAD_FPU_REGS):(((REGNO)&1)?MUL_REGS:GENERAL_REGS))
+
+
+/* The class value for index registers, and the one for base regs.  */
+#define INDEX_REG_CLASS GENERAL_REGS
+#define BASE_REG_CLASS GENERAL_REGS
+
+/* Get reg_class from a letter such as appears in the machine description.  */
+
+#define REG_CLASS_FROM_LETTER(C)	\
+((C) == 'f' ? FPU_REGS :			\
+  ((C) == 'd' ? MUL_REGS : 			\
+   ((C) == 'a' ? LOAD_FPU_REGS : NO_REGS)))
+    
+
+/* The letters I, J, K, L and M in a register constraint string
+   can be used to stand for particular ranges of immediate operands.
+   This macro defines what the ranges are.
+   C is the letter, and VALUE is a constant value.
+   Return 1 if VALUE is in the range specified by C.
+
+   I		bits 31-16 0000
+   J		bits 15-00 0000
+   K		completely random 32 bit
+   L,M,N	-1,1,0 respectively
+   O 		where doing shifts in sequence is faster than 
+                one big shift 
+*/
+
+#define CONST_OK_FOR_LETTER_P(VALUE, C)  \
+  ((C) == 'I' ? ((VALUE) & 0xffff0000) == 0		\
+   : (C) == 'J' ? ((VALUE) & 0x0000ffff) == 0  	       	\
+   : (C) == 'K' ? (((VALUE) & 0xffff0000) != 0		\
+		   && ((VALUE) & 0x0000ffff) != 0)	\
+   : (C) == 'L' ? ((VALUE) == 1)			\
+   : (C) == 'M' ? ((VALUE) == -1)			\
+   : (C) == 'N' ? ((VALUE) == 0)			\
+   : (C) == 'O' ? (abs(VALUE) >1 && abs(VALUE) <= 4)		\
+   : 0)
+
+/* Similar, but for floating constants, and defining letters G and H.
+   Here VALUE is the CONST_DOUBLE rtx itself.  */
+
+#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
+  ((C) == 'G' && XINT (VALUE, 0) == 0 && XINT (VALUE, 1) == 0)
+
+
+/* Letters in the range `Q' through `U' may be defined in a
+   machine-dependent fashion to stand for arbitrary operand types. 
+   The machine description macro `EXTRA_CONSTRAINT' is passed the
+   operand as its first argument and the constraint letter as its
+   second operand.
+
+   `Q'	is for memory references that require an extra word after the opcode.
+   `R'	is for memory references which are encoded within the opcode.  */
+
+#define EXTRA_CONSTRAINT(OP,CODE)					\
+  ((GET_CODE (OP) != MEM) ? 0						\
+   : !legitimate_address_p (GET_MODE (OP), XEXP (OP, 0)) ? 0		\
+   : ((CODE) == 'Q')	  ? !simple_memory_operand (OP, GET_MODE (OP))	\
+   : ((CODE) == 'R')	  ? simple_memory_operand (OP, GET_MODE (OP))	\
+   : 0)
+
+/* Given an rtx X being reloaded into a reg required to be
+   in class CLASS, return the class of reg to actually use.
+   In general this is just CLASS; but on some machines
+   in some cases it is preferable to use a more restrictive class.  
+
+loading is easier into LOAD_FPU_REGS than FPU_REGS! */
+
+#define PREFERRED_RELOAD_CLASS(X,CLASS) 	\
+(((CLASS) != FPU_REGS)?(CLASS):LOAD_FPU_REGS)
+
+#define SECONDARY_RELOAD_CLASS(CLASS,MODE,x)	\
+(((CLASS) == NO_LOAD_FPU_REGS && !(REG_P(x) && LOAD_FPU_REG_P(REGNO(x))))?LOAD_FPU_REGS:NO_REGS)
+
+/* Return the maximum number of consecutive registers
+   needed to represent mode MODE in a register of class CLASS.  */
+#define CLASS_MAX_NREGS(CLASS, MODE)	\
+((CLASS == GENERAL_REGS || CLASS == MUL_REGS)?				\
+  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD):	\
+  1									\
+)
+
+
+/* Stack layout; function entry, exit and calling.  */
+
+/* Define this if pushing a word on the stack
+   makes the stack pointer a smaller address.  */
+#define STACK_GROWS_DOWNWARD
+
+/* Define this to nonzero if the nominal address of the stack frame
+   is at the high-address end of the local variables;
+   that is, each additional local variable allocated
+   goes at a more negative offset in the frame.
+*/
+#define FRAME_GROWS_DOWNWARD 1
+
+/* Offset within stack frame to start allocating local variables at.
+   If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
+   first local allocated.  Otherwise, it is the offset to the BEGINNING
+   of the first local allocated.  */
+#define STARTING_FRAME_OFFSET 0
+
+/* If we generate an insn to push BYTES bytes,
+   this says how many the stack pointer really advances by.
+   On the pdp11, the stack is on an even boundary */
+#define PUSH_ROUNDING(BYTES) ((BYTES + 1) & ~1)
+
+/* current_first_parm_offset stores the # of registers pushed on the 
+   stack */
+extern int current_first_parm_offset;
+
+/* Offset of first parameter from the argument pointer register value.  
+   For the pdp11, this is nonzero to account for the return address.
+	1 - return address
+	2 - frame pointer (always saved, even when not used!!!!)
+		-- change some day !!!:q!
+
+*/
+#define FIRST_PARM_OFFSET(FNDECL) 4
+
+/* Value is 1 if returning from a function call automatically
+   pops the arguments described by the number-of-args field in the call.
+   FUNDECL is the declaration node of the function (as a tree),
+   FUNTYPE is the data type of the function (as a tree),
+   or for a library call it is an identifier node for the subroutine name.  */
+
+#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
+
+/* Define how to find the value returned by a function.
+   VALTYPE is the data type of the value (as a tree).
+   If the precise function being called is known, FUNC is its FUNCTION_DECL;
+   otherwise, FUNC is 0.  */
+#define BASE_RETURN_VALUE_REG(MODE) \
+ ((MODE) == DFmode ? 8 : 0) 
+
+/* On the pdp11 the value is found in R0 (or ac0??? 
+not without FPU!!!! ) */
+
+#define FUNCTION_VALUE(VALTYPE, FUNC)  \
+  gen_rtx_REG (TYPE_MODE (VALTYPE), BASE_RETURN_VALUE_REG(TYPE_MODE(VALTYPE)))
+
+/* and the called function leaves it in the first register.
+   Difference only on machines with register windows.  */
+
+#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC)  \
+  gen_rtx_REG (TYPE_MODE (VALTYPE), BASE_RETURN_VALUE_REG(TYPE_MODE(VALTYPE)))
+
+/* Define how to find the value returned by a library function
+   assuming the value has mode MODE.  */
+
+#define LIBCALL_VALUE(MODE)  gen_rtx_REG (MODE, BASE_RETURN_VALUE_REG(MODE))
+
+/* 1 if N is a possible register number for a function value
+   as seen by the caller.
+   On the pdp, the first "output" reg is the only register thus used. 
+
+maybe ac0 ? - as option someday! */
+
+#define FUNCTION_VALUE_REGNO_P(N) (((N) == 0) || (TARGET_AC0 && (N) == 8))
+
+/* 1 if N is a possible register number for function argument passing.
+   - not used on pdp */
+
+#define FUNCTION_ARG_REGNO_P(N) 0
+
+/* Define a data type for recording info about an argument list
+   during the scan of that argument list.  This data type should
+   hold all necessary information about the function itself
+   and about the args processed so far, enough to enable macros
+   such as FUNCTION_ARG to determine where the next arg should go.
+
+*/
+
+#define CUMULATIVE_ARGS int
+
+/* Initialize a variable CUM of type CUMULATIVE_ARGS
+   for a call to a function whose data type is FNTYPE.
+   For a library call, FNTYPE is 0.
+
+   ...., the offset normally starts at 0, but starts at 1 word
+   when the function gets a structure-value-address as an
+   invisible first argument.  */
+
+#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
+ ((CUM) = 0)
+
+/* Update the data in CUM to advance over an argument
+   of mode MODE and data type TYPE.
+   (TYPE is null for libcalls where that information may not be available.)  
+
+*/
+
+
+#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)	\
+ ((CUM) += ((MODE) != BLKmode			\
+	    ? (GET_MODE_SIZE (MODE))		\
+	    : (int_size_in_bytes (TYPE))))	
+
+/* Determine where to put an argument to a function.
+   Value is zero to push the argument on the stack,
+   or a hard register in which to store the argument.
+
+   MODE is the argument's machine mode.
+   TYPE is the data type of the argument (as a tree).
+    This is null for libcalls where that information may
+    not be available.
+   CUM is a variable of type CUMULATIVE_ARGS which gives info about
+    the preceding args and about the function being called.
+   NAMED is nonzero if this argument is a named parameter
+    (otherwise it is an extra parameter matching an ellipsis).  */
+
+#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)  0
+
+/* Define where a function finds its arguments.
+   This would be different from FUNCTION_ARG if we had register windows.  */
+/*
+#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)	\
+  FUNCTION_ARG (CUM, MODE, TYPE, NAMED)
+*/
+
+/* Output assembler code to FILE to increment profiler label # LABELNO
+   for profiling a function entry.  */
+
+#define FUNCTION_PROFILER(FILE, LABELNO)  \
+   gcc_unreachable ();
+
+/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
+   the stack pointer does not matter.  The value is tested only in
+   functions that have frame pointers.
+   No definition is equivalent to always zero.  */
+
+extern int may_call_alloca;
+
+#define EXIT_IGNORE_STACK	1
+
+#define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR)	\
+{								\
+  int offset, regno;		      				\
+  offset = get_frame_size();					\
+  for (regno = 0; regno < 8; regno++)				\
+    if (df_regs_ever_live_p (regno) && ! call_used_regs[regno])	\
+      offset += 2;						\
+  for (regno = 8; regno < 14; regno++)				\
+    if (df_regs_ever_live_p (regno) && ! call_used_regs[regno])	\
+      offset += 8;						\
+  /* offset -= 2;   no fp on stack frame */			\
+  (DEPTH_VAR) = offset;						\
+}   
+    
+
+/* Addressing modes, and classification of registers for them.  */
+
+#define HAVE_POST_INCREMENT 1
+
+#define HAVE_PRE_DECREMENT 1
+
+/* Macros to check register numbers against specific register classes.  */
+
+/* These assume that REGNO is a hard or pseudo reg number.
+   They give nonzero only if REGNO is a hard reg of the suitable class
+   or a pseudo reg currently allocated to a suitable hard reg.
+   Since they use reg_renumber, they are safe only once reg_renumber
+   has been allocated, which happens in local-alloc.c.  */
+
+#define REGNO_OK_FOR_INDEX_P(REGNO) \
+  ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
+#define REGNO_OK_FOR_BASE_P(REGNO)  \
+  ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
+
+/* Now macros that check whether X is a register and also,
+   strictly, whether it is in a specified class.
+*/
+
+
+
+/* Maximum number of registers that can appear in a valid memory address.  */
+
+#define MAX_REGS_PER_ADDRESS 1
+
+/* Recognize any constant value that is a valid address.  */
+
+#define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
+
+/* Nonzero if the constant value X is a legitimate general operand.
+   It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
+
+#define LEGITIMATE_CONSTANT_P(X)                                        \
+  (GET_CODE (X) != CONST_DOUBLE || legitimate_const_double_p (X))
+
+/* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
+   and check its validity for a certain class.
+   We have two alternate definitions for each of them.
+   The usual definition accepts all pseudo regs; the other rejects
+   them unless they have been allocated suitable hard regs.
+   The symbol REG_OK_STRICT causes the latter definition to be used.
+
+   Most source files want to accept pseudo regs in the hope that
+   they will get allocated to the class that the insn wants them to be in.
+   Source files for reload pass need to be strict.
+   After reload, it makes no difference, since pseudo regs have
+   been eliminated by then.  */
+
+#ifndef REG_OK_STRICT
+
+/* Nonzero if X is a hard reg that can be used as an index
+   or if it is a pseudo reg.  */
+#define REG_OK_FOR_INDEX_P(X) (1)
+/* Nonzero if X is a hard reg that can be used as a base reg
+   or if it is a pseudo reg.  */
+#define REG_OK_FOR_BASE_P(X) (1)
+
+#else
+
+/* Nonzero if X is a hard reg that can be used as an index.  */
+#define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
+/* Nonzero if X is a hard reg that can be used as a base reg.  */
+#define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
+
+#endif
+
+/* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
+   that is a valid memory address for an instruction.
+   The MODE argument is the machine mode for the MEM expression
+   that wants to use this address.
+
+*/
+
+#define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
+{						      \
+    rtx xfoob;								\
+									\
+    /* accept (R0) */							\
+    if (GET_CODE (operand) == REG					\
+	&& REG_OK_FOR_BASE_P(operand))					\
+      goto ADDR;							\
+									\
+    /* accept @#address */						\
+    if (CONSTANT_ADDRESS_P (operand))					\
+      goto ADDR;							\
+    									\
+    /* accept X(R0) */							\
+    if (GET_CODE (operand) == PLUS       				\
+	&& GET_CODE (XEXP (operand, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (operand, 0))			\
+	&& CONSTANT_ADDRESS_P (XEXP (operand, 1)))			\
+      goto ADDR;							\
+    									\
+    /* accept -(R0) */							\
+    if (GET_CODE (operand) == PRE_DEC					\
+	&& GET_CODE (XEXP (operand, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (operand, 0)))			\
+      goto ADDR;							\
+									\
+    /* accept (R0)+ */							\
+    if (GET_CODE (operand) == POST_INC					\
+	&& GET_CODE (XEXP (operand, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (operand, 0)))			\
+      goto ADDR;							\
+									\
+    /* accept -(SP) -- which uses PRE_MODIFY for byte mode */		\
+    if (GET_CODE (operand) == PRE_MODIFY				\
+	&& GET_CODE (XEXP (operand, 0)) == REG				\
+	&& REGNO (XEXP (operand, 0)) == 6        	        	\
+	&& GET_CODE ((xfoob = XEXP (operand, 1))) == PLUS		\
+	&& GET_CODE (XEXP (xfoob, 0)) == REG				\
+	&& REGNO (XEXP (xfoob, 0)) == 6	        	        	\
+	&& CONSTANT_P (XEXP (xfoob, 1))                                 \
+	&& INTVAL (XEXP (xfoob,1)) == -2)      	               		\
+      goto ADDR;							\
+									\
+    /* accept (SP)+ -- which uses POST_MODIFY for byte mode */		\
+    if (GET_CODE (operand) == POST_MODIFY				\
+	&& GET_CODE (XEXP (operand, 0)) == REG				\
+	&& REGNO (XEXP (operand, 0)) == 6        	        	\
+	&& GET_CODE ((xfoob = XEXP (operand, 1))) == PLUS		\
+	&& GET_CODE (XEXP (xfoob, 0)) == REG				\
+	&& REGNO (XEXP (xfoob, 0)) == 6	        	        	\
+	&& CONSTANT_P (XEXP (xfoob, 1))                                 \
+	&& INTVAL (XEXP (xfoob,1)) == 2)      	               		\
+      goto ADDR;							\
+									\
+    									\
+    /* handle another level of indirection ! */				\
+    if (GET_CODE(operand) != MEM)					\
+      goto fail;							\
+									\
+    xfoob = XEXP (operand, 0);						\
+									\
+    /* (MEM:xx (MEM:xx ())) is not valid for SI, DI and currently */    \
+    /* also forbidden for float, because we have to handle this */  	\
+    /* in output_move_double and/or output_move_quad() - we could */   	\
+    /* do it, but currently it's not worth it!!! */			\
+    /* now that DFmode cannot go into CPU register file, */		\
+    /* maybe I should allow float ... */				\
+    /*  but then I have to handle memory-to-memory moves in movdf ?? */ \
+									\
+    if (GET_MODE_BITSIZE(mode) > 16)					\
+      goto fail;							\
+									\
+    /* accept @(R0) - which is @0(R0) */				\
+    if (GET_CODE (xfoob) == REG						\
+	&& REG_OK_FOR_BASE_P(xfoob))					\
+      goto ADDR;							\
+									\
+    /* accept @address */						\
+    if (CONSTANT_ADDRESS_P (xfoob))					\
+      goto ADDR;							\
+    									\
+    /* accept @X(R0) */							\
+    if (GET_CODE (xfoob) == PLUS       					\
+	&& GET_CODE (XEXP (xfoob, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (xfoob, 0))				\
+	&& CONSTANT_ADDRESS_P (XEXP (xfoob, 1)))			\
+      goto ADDR;							\
+									\
+    /* accept @-(R0) */							\
+    if (GET_CODE (xfoob) == PRE_DEC					\
+	&& GET_CODE (XEXP (xfoob, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (xfoob, 0)))				\
+      goto ADDR;							\
+									\
+    /* accept @(R0)+ */							\
+    if (GET_CODE (xfoob) == POST_INC					\
+	&& GET_CODE (XEXP (xfoob, 0)) == REG				\
+	&& REG_OK_FOR_BASE_P (XEXP (xfoob, 0)))				\
+      goto ADDR;							\
+									\
+  /* anything else is invalid */					\
+  fail: ;								\
+}
+
+
+/* Go to LABEL if ADDR (a legitimate address expression)
+   has an effect that depends on the machine mode it is used for.
+   On the pdp this is for predec/postinc, and this is now treated
+   generically in recog.c.  */
+
+#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
+
+
+/* Specify the machine mode that this machine uses
+   for the index in the tablejump instruction.  */
+#define CASE_VECTOR_MODE HImode
+
+/* Define this if a raw index is all that is needed for a
+   `tablejump' insn.  */
+#define CASE_TAKES_INDEX_RAW
+
+/* Define this as 1 if `char' should by default be signed; else as 0.  */
+#define DEFAULT_SIGNED_CHAR 1
+
+/* Max number of bytes we can move from memory to memory
+   in one reasonably fast instruction.  
+*/
+
+#define MOVE_MAX 2
+
+/* Nonzero if access to memory by byte is slow and undesirable. -
+*/
+#define SLOW_BYTE_ACCESS 0
+
+/* Do not break .stabs pseudos into continuations.  */
+#define DBX_CONTIN_LENGTH 0
+
+/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
+   is done just by pretending it is already truncated.  */
+#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
+
+/* Give a comparison code (EQ, NE etc) and the first operand of a COMPARE,
+   return the mode to be used for the comparison.  For floating-point, CCFPmode
+   should be used.  */
+
+#define SELECT_CC_MODE(OP,X,Y)	\
+(GET_MODE_CLASS(GET_MODE(X)) == MODE_FLOAT? CCFPmode : CCmode)
+
+/* Specify the machine mode that pointers have.
+   After generation of rtl, the compiler makes no further distinction
+   between pointers and any other objects of this machine mode.  */
+#define Pmode HImode
+
+/* A function address in a call instruction
+   is a word address (for indexing purposes)
+   so give the MEM rtx a word's mode.  */
+#define FUNCTION_MODE HImode
+
+/* Define this if addresses of constant functions
+   shouldn't be put through pseudo regs where they can be cse'd.
+   Desirable on machines where ordinary constants are expensive
+   but a CALL with constant address is cheap.  */
+/* #define NO_FUNCTION_CSE */
+
+
+/* cost of moving one register class to another */
+#define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \
+  register_move_cost (CLASS1, CLASS2)
+
+/* Tell emit-rtl.c how to initialize special values on a per-function base.  */
+extern int optimize;
+extern struct rtx_def *cc0_reg_rtx;
+
+#define CC_STATUS_MDEP rtx
+
+#define CC_STATUS_MDEP_INIT (cc_status.mdep = 0)
+
+/* Tell final.c how to eliminate redundant test instructions.  */
+
+/* Here we define machine-dependent flags and fields in cc_status
+   (see `conditions.h').  */
+
+#define CC_IN_FPU 04000 
+
+/* Do UPDATE_CC if EXP is a set, used in
+   NOTICE_UPDATE_CC 
+
+   floats only do compare correctly, else nullify ...
+
+   get cc0 out soon ...
+*/
+
+/* Store in cc_status the expressions
+   that the condition codes will describe
+   after execution of an instruction whose pattern is EXP.
+   Do not alter them if the instruction would not alter the cc's.  */
+
+#define NOTICE_UPDATE_CC(EXP, INSN) \
+{ if (GET_CODE (EXP) == SET)					\
+    {								\
+      notice_update_cc_on_set(EXP, INSN);			\
+    }								\
+  else if (GET_CODE (EXP) == PARALLEL				\
+	   && GET_CODE (XVECEXP (EXP, 0, 0)) == SET)		\
+    {								\
+      notice_update_cc_on_set(XVECEXP (EXP, 0, 0), INSN);	\
+    }								\
+  else if (GET_CODE (EXP) == CALL)				\
+    { /* all bets are off */ CC_STATUS_INIT; }			\
+  if (cc_status.value1 && GET_CODE (cc_status.value1) == REG	\
+      && cc_status.value2					\
+      && reg_overlap_mentioned_p (cc_status.value1, cc_status.value2)) \
+    { 								\
+      printf ("here!\n");					\
+      cc_status.value2 = 0;					\
+    }								\
+}
+
+/* Control the assembler format that we output.  */
+
+/* Output to assembler file text saying following lines
+   may contain character constants, extra white space, comments, etc.  */
+
+#define ASM_APP_ON ""
+
+/* Output to assembler file text saying following lines
+   no longer contain unusual constructs.  */
+
+#define ASM_APP_OFF ""
+
+/* Output before read-only data.  */
+
+#define TEXT_SECTION_ASM_OP "\t.text\n"
+
+/* Output before writable data.  */
+
+#define DATA_SECTION_ASM_OP "\t.data\n"
+
+/* How to refer to registers in assembler output.
+   This sequence is indexed by compiler's hard-register-number (see above).  */
+
+#define REGISTER_NAMES \
+{"r0", "r1", "r2", "r3", "r4", "r5", "sp", "pc",     \
+ "ac0", "ac1", "ac2", "ac3", "ac4", "ac5" }
+
+/* Globalizing directive for a label.  */
+#define GLOBAL_ASM_OP "\t.globl "
+
+/* The prefix to add to user-visible assembler symbols.  */
+
+#define USER_LABEL_PREFIX "_"
+
+/* This is how to store into the string LABEL
+   the symbol_ref name of an internal numbered label where
+   PREFIX is the class of label and NUM is the number within the class.
+   This is suitable for output with `assemble_name'.  */
+
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
+  sprintf (LABEL, "*%s_%lu", PREFIX, (unsigned long)(NUM))
+
+#define ASM_OUTPUT_ASCII(FILE, P, SIZE)  \
+  output_ascii (FILE, P, SIZE)
+
+/* This is how to output an element of a case-vector that is absolute.  */
+
+#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
+  fprintf (FILE, "\t%sL_%d\n", TARGET_UNIX_ASM ? "" : ".word ", VALUE)
+
+/* This is how to output an element of a case-vector that is relative.
+   Don't define this if it is not supported.  */
+
+/* #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) */
+
+/* This is how to output an assembler line
+   that says to advance the location counter
+   to a multiple of 2**LOG bytes. 
+
+   who needs this????
+*/
+
+#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
+  switch (LOG)				\
+    {					\
+      case 0:				\
+	break;				\
+      case 1:				\
+	fprintf (FILE, "\t.even\n");	\
+	break;				\
+      default:				\
+	gcc_unreachable ();		\
+    }
+
+#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
+  fprintf (FILE, "\t.=.+ %#ho\n", (unsigned short)(SIZE))
+
+/* This says how to output an assembler line
+   to define a global common symbol.  */
+
+#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
+( fprintf ((FILE), ".globl "),			\
+  assemble_name ((FILE), (NAME)),		\
+  fprintf ((FILE), "\n"),			\
+  assemble_name ((FILE), (NAME)),		\
+  fprintf ((FILE), ": .=.+ %#ho\n", (unsigned short)(ROUNDED))		\
+)
+
+/* This says how to output an assembler line
+   to define a local common symbol.  */
+
+#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
+( assemble_name ((FILE), (NAME)),				\
+  fprintf ((FILE), ":\t.=.+ %#ho\n", (unsigned short)(ROUNDED)))
+
+/* Print operand X (an rtx) in assembler syntax to file FILE.
+   CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
+   For `%' followed by punctuation, CODE is the punctuation and X is null.
+
+*/
+
+
+#define PRINT_OPERAND(FILE, X, CODE)  \
+{ if (CODE == '#') fprintf (FILE, "#");					\
+  else if (GET_CODE (X) == REG)						\
+    fprintf (FILE, "%s", reg_names[REGNO (X)]);				\
+  else if (GET_CODE (X) == MEM)						\
+    output_address (XEXP (X, 0));					\
+  else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != SImode)	\
+    { REAL_VALUE_TYPE r;						\
+      long sval[2];							\
+      REAL_VALUE_FROM_CONST_DOUBLE (r, X);				\
+      REAL_VALUE_TO_TARGET_DOUBLE (r, sval);				\
+      fprintf (FILE, "$%#lo", sval[0] >> 16); }				\
+  else { putc ('$', FILE); output_addr_const_pdp11 (FILE, X); }}
+
+/* Print a memory address as an operand to reference that memory location.  */
+
+#define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
+ print_operand_address (FILE, ADDR)
+
+#define ASM_OUTPUT_REG_PUSH(FILE,REGNO)			\
+(							\
+  fprintf (FILE, "\tmov %s, -(sp)\n", reg_names[REGNO])	\
+)
+
+#define ASM_OUTPUT_REG_POP(FILE,REGNO)                 		\
+(                                                       	\
+  fprintf (FILE, "\tmov (sp)+, %s\n", reg_names[REGNO])     	\
+)
+
+/* trampoline - how should i do it in separate i+d ? 
+   have some allocate_trampoline magic??? 
+
+   the following should work for shared I/D: */
+
+/* lets see whether this works as trampoline:
+MV	#STATIC, $4	0x940Y	0x0000 <- STATIC; Y = STATIC_CHAIN_REGNUM
+JMP	FUNCTION	0x0058  0x0000 <- FUNCTION
+*/
+
+#define TRAMPOLINE_TEMPLATE(FILE)	\
+{					\
+  gcc_assert (!TARGET_SPLIT);		\
+					\
+  assemble_aligned_integer (2, GEN_INT (0x9400+STATIC_CHAIN_REGNUM));	\
+  assemble_aligned_integer (2, const0_rtx);				\
+  assemble_aligned_integer (2, GEN_INT(0x0058));			\
+  assemble_aligned_integer (2, const0_rtx);				\
+}
+
+#define TRAMPOLINE_SIZE 8
+#define TRAMPOLINE_ALIGNMENT 16
+
+/* Emit RTL insns to initialize the variable parts of a trampoline.
+   FNADDR is an RTX for the address of the function's pure code.
+   CXT is an RTX for the static chain value for the function.  */
+
+#define INITIALIZE_TRAMPOLINE(TRAMP,FNADDR,CXT)	\
+{					\
+  gcc_assert (!TARGET_SPLIT);		\
+					\
+  emit_move_insn (gen_rtx_MEM (HImode, plus_constant (TRAMP, 2)), CXT); \
+  emit_move_insn (gen_rtx_MEM (HImode, plus_constant (TRAMP, 6)), FNADDR); \
+}
+
+
+/* Some machines may desire to change what optimizations are
+   performed for various optimization levels.   This macro, if
+   defined, is executed once just after the optimization level is
+   determined and before the remainder of the command options have
+   been parsed.  Values set in this macro are used as the default
+   values for the other command line options.
+
+   LEVEL is the optimization level specified; 2 if -O2 is
+   specified, 1 if -O is specified, and 0 if neither is specified.  */
+
+#define OPTIMIZATION_OPTIONS(LEVEL,SIZE)				\
+{									\
+  if (LEVEL >= 3)							\
+    {									\
+      flag_omit_frame_pointer		= 1;				\
+      /* flag_unroll_loops			= 1; */			\
+    }									\
+}
+
+/* there is no point in avoiding branches on a pdp, 
+   since branches are really cheap - I just want to find out
+   how much difference the BRANCH_COST macro makes in code */
+#define BRANCH_COST(speed_p, predictable_p) (TARGET_BRANCH_CHEAP ? 0 : 1)
+
+
+#define COMPARE_FLAG_MODE HImode