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gnu / gcc / 737cee66f221eb8de21f0e41affc4b13cb7c0feb / . / gcc / config / m68k / m68k.c
blob: 781e11cf65cb3e31cf6f471e127cfe5b0556fc6d [file] [log] [blame]
/* Subroutines for insn-output.c for Motorola 68000 family.
Copyright (C) 1987, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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 2, or (at your option)
any later version.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Some output-actions in m68k.md need these. */
#include <stdio.h>
#include "config.h"
#include "rtl.h"
#include "regs.h"
#include "hard-reg-set.h"
#include "real.h"
#include "insn-config.h"
#include "conditions.h"
#include "insn-flags.h"
#include "output.h"
#include "insn-attr.h"
/* Needed for use_return_insn. */
#include "flags.h"
#ifdef SUPPORT_SUN_FPA
/* Index into this array by (register number >> 3) to find the
smallest class which contains that register. */
enum reg_class regno_reg_class[]
= { DATA_REGS, ADDR_REGS, FP_REGS,
LO_FPA_REGS, LO_FPA_REGS, FPA_REGS, FPA_REGS };
#endif /* defined SUPPORT_SUN_FPA */
/* This flag is used to communicate between movhi and ASM_OUTPUT_CASE_END,
if SGS_SWITCH_TABLE. */
int switch_table_difference_label_flag;
static rtx find_addr_reg ();
rtx legitimize_pic_address ();
/* Alignment to use for loops and jumps */
/* Specify power of two alignment used for loops. */
char *m68k_align_loops_string;
/* Specify power of two alignment used for non-loop jumps. */
char *m68k_align_jumps_string;
/* Specify power of two alignment used for functions. */
char *m68k_align_funcs_string;
/* Specify power of two alignment used for loops. */
int m68k_align_loops;
/* Specify power of two alignment used for non-loop jumps. */
int m68k_align_jumps;
/* Specify power of two alignment used for functions. */
int m68k_align_funcs;
/* Nonzero if the last compare/test insn had FP operands. The
sCC expanders peek at this to determine what to do for the
68060, which has no fsCC instructions. */
int m68k_last_compare_had_fp_operands;
/* Sometimes certain combinations of command options do not make
sense on a particular target machine. You can define a macro
`OVERRIDE_OPTIONS' to take account of this. This macro, if
defined, is executed once just after all the command options have
been parsed.
Don't use this macro to turn on various extra optimizations for
`-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
void
override_options ()
{
int def_align;
def_align = 1;
/* Validate -malign-loops= value, or provide default */
if (m68k_align_loops_string)
{
m68k_align_loops = atoi (m68k_align_loops_string);
if (m68k_align_loops < 1 || m68k_align_loops > MAX_CODE_ALIGN)
fatal ("-malign-loops=%d is not between 1 and %d",
m68k_align_loops, MAX_CODE_ALIGN);
}
else
m68k_align_loops = def_align;
/* Validate -malign-jumps= value, or provide default */
if (m68k_align_jumps_string)
{
m68k_align_jumps = atoi (m68k_align_jumps_string);
if (m68k_align_jumps < 1 || m68k_align_jumps > MAX_CODE_ALIGN)
fatal ("-malign-jumps=%d is not between 1 and %d",
m68k_align_jumps, MAX_CODE_ALIGN);
}
else
m68k_align_jumps = def_align;
/* Validate -malign-functions= value, or provide default */
if (m68k_align_funcs_string)
{
m68k_align_funcs = atoi (m68k_align_funcs_string);
if (m68k_align_funcs < 1 || m68k_align_funcs > MAX_CODE_ALIGN)
fatal ("-malign-functions=%d is not between 1 and %d",
m68k_align_funcs, MAX_CODE_ALIGN);
}
else
m68k_align_funcs = def_align;
}
/* Emit a (use pic_offset_table_rtx) if we used PIC relocation in the
function at any time during the compilation process. In the future
we should try and eliminate the USE if we can easily determine that
all PIC references were deleted from the current function. That would
save an address register */
void
finalize_pic ()
{
if (flag_pic && current_function_uses_pic_offset_table)
{
rtx insn = gen_rtx (USE, VOIDmode, pic_offset_table_rtx);
emit_insn_after (insn, get_insns ());
emit_insn (insn);
}
}
/* This function generates the assembly code for function entry.
STREAM is a stdio stream to output the code to.
SIZE is an int: how many units of temporary storage to allocate.
Refer to the array `regs_ever_live' to determine which registers
to save; `regs_ever_live[I]' is nonzero if register number I
is ever used in the function. This function is responsible for
knowing which registers should not be saved even if used. */
/* Note that the order of the bit mask for fmovem is the opposite
of the order for movem! */
void
output_function_prologue (stream, size)
FILE *stream;
int size;
{
register int regno;
register int mask = 0;
int num_saved_regs = 0;
extern char call_used_regs[];
int fsize = (size + 3) & -4;
if (frame_pointer_needed)
{
if (fsize == 0 && TARGET_68040)
{
/* on the 68040, pea + move is faster than link.w 0 */
#ifdef MOTOROLA
asm_fprintf (stream, "\tpea (%s)\n\tmove.l %s,%s\n",
reg_names[FRAME_POINTER_REGNUM], reg_names[STACK_POINTER_REGNUM],
reg_names[FRAME_POINTER_REGNUM]);
#else
asm_fprintf (stream, "\tpea %s@\n\tmovel %s,%s\n",
reg_names[FRAME_POINTER_REGNUM], reg_names[STACK_POINTER_REGNUM],
reg_names[FRAME_POINTER_REGNUM]);
#endif
}
else if (fsize < 0x8000)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tlink.w %s,%0I%d\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#else
asm_fprintf (stream, "\tlink %s,%0I%d\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#endif
}
else if (TARGET_68020)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tlink.l %s,%0I%d\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#else
asm_fprintf (stream, "\tlink %s,%0I%d\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#endif
}
else
{
/* Adding negative number is faster on the 68040. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tlink.w %s,%0I0\n\tadd.l %0I%d,%Rsp\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#else
asm_fprintf (stream, "\tlink %s,%0I0\n\taddl %0I%d,%Rsp\n",
reg_names[FRAME_POINTER_REGNUM], -fsize);
#endif
}
}
else if (fsize)
{
if (fsize + 4 < 0x8000)
{
#ifdef NO_ADDSUB_Q
if (fsize + 4 <= 8)
{
if (!TARGET_5200)
{
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tsubq.w %OI%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\tsubqw %OI%d,%Rsp\n", fsize + 4);
#endif
}
else
{
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tsubq.l %OI%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\tsubql %OI%d,%Rsp\n", fsize + 4);
#endif
}
}
else if (fsize + 4 <= 16 && TARGET_CPU32)
{
/* On the CPU32 it is faster to use two subqw instructions to
subtract a small integer (8 < N <= 16) to a register. */
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tsubq.w %OI8,%Rsp\n\tsubq.w %OI%d,%Rsp\n",
fsize + 4);
#else
asm_fprintf (stream, "\tsubqw %OI8,%Rsp\n\tsubqw %OI%d,%Rsp\n",
fsize + 4);
#endif
}
else
#endif /* NO_ADDSUB_Q */
if (TARGET_68040)
{
/* Adding negative number is faster on the 68040. */
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tadd.w %0I%d,%Rsp\n", - (fsize + 4));
#else
asm_fprintf (stream, "\taddw %0I%d,%Rsp\n", - (fsize + 4));
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tlea (%d,%Rsp),%Rsp\n", - (fsize + 4));
#else
asm_fprintf (stream, "\tlea %Rsp@(%d),%Rsp\n", - (fsize + 4));
#endif
}
}
else
{
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tadd.l %0I%d,%Rsp\n", - (fsize + 4));
#else
asm_fprintf (stream, "\taddl %0I%d,%Rsp\n", - (fsize + 4));
#endif
}
}
#ifdef SUPPORT_SUN_FPA
for (regno = 24; regno < 56; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfpmovd %s,-(%Rsp)\n",
reg_names[regno]);
#else
asm_fprintf (stream, "\tfpmoved %s,%Rsp@-\n",
reg_names[regno]);
#endif
}
#endif
if (TARGET_68881)
{
for (regno = 16; regno < 24; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
mask |= 1 << (regno - 16);
if ((mask & 0xff) != 0)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfmovm %0I0x%x,-(%Rsp)\n", mask & 0xff);
#else
asm_fprintf (stream, "\tfmovem %0I0x%x,%Rsp@-\n", mask & 0xff);
#endif
}
mask = 0;
}
for (regno = 0; regno < 16; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
{
mask |= 1 << (15 - regno);
num_saved_regs++;
}
if (frame_pointer_needed)
{
mask &= ~ (1 << (15 - FRAME_POINTER_REGNUM));
num_saved_regs--;
}
#if NEED_PROBE
#ifdef MOTOROLA
#ifdef CRDS
asm_fprintf (stream, "\ttstl %d(%Rsp)\n", NEED_PROBE - num_saved_regs * 4);
#else
asm_fprintf (stream, "\ttst.l %d(%Rsp)\n", NEED_PROBE - num_saved_regs * 4);
#endif
#else
asm_fprintf (stream, "\ttstl %Rsp@(%d)\n", NEED_PROBE - num_saved_regs * 4);
#endif
#endif
if (num_saved_regs <= 2)
{
/* Store each separately in the same order moveml uses.
Using two movel instructions instead of a single moveml
is about 15% faster for the 68020 and 68030 at no expense
in code size */
int i;
/* Undo the work from above. */
for (i = 0; i< 16; i++)
if (mask & (1 << i))
asm_fprintf (stream,
#ifdef MOTOROLA
"\t%Omove.l %s,-(%Rsp)\n",
#else
"\tmovel %s,%Rsp@-\n",
#endif
reg_names[15 - i]);
}
else if (mask)
{
if (TARGET_5200)
{
/* The coldfire does not support the predecrement form of the
movml instruction, so we must adjust the stack pointer and
then use the plain address register indirect mode. We also
have to invert the register save mask to use the new mode.
FIXME: if num_saved_regs was calculated earlier, we could
combine the stack pointer adjustment with any adjustment
done when the initial stack frame is created. This would
save an instruction */
int newmask = 0;
int i;
for (i = 0; i < 16; i++)
if (mask & (1 << i))
newmask |= (1 << (15-i));
#ifdef MOTOROLA
asm_fprintf (stream, "\tlea (%d,%Rsp),%Rsp\n", -num_saved_regs*4);
asm_fprintf (stream, "\tmovm.l %0I0x%x,(%Rsp)\n", newmask);
#else
asm_fprintf (stream, "\tlea %Rsp@(%d),%Rsp\n", -num_saved_regs*4);
asm_fprintf (stream, "\tmoveml %0I0x%x,%Rsp@\n", newmask);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tmovm.l %0I0x%x,-(%Rsp)\n", mask);
#else
asm_fprintf (stream, "\tmoveml %0I0x%x,%Rsp@-\n", mask);
#endif
}
}
if (flag_pic && current_function_uses_pic_offset_table)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\t%Olea (%Rpc, %U_GLOBAL_OFFSET_TABLE_@GOTPC), %s\n",
reg_names[PIC_OFFSET_TABLE_REGNUM]);
#else
asm_fprintf (stream, "\tmovel %0I__GLOBAL_OFFSET_TABLE_, %s\n",
reg_names[PIC_OFFSET_TABLE_REGNUM]);
asm_fprintf (stream, "\tlea %Rpc@(0,%s:l),%s\n",
reg_names[PIC_OFFSET_TABLE_REGNUM],
reg_names[PIC_OFFSET_TABLE_REGNUM]);
#endif
}
}
/* Return true if this function's epilogue can be output as RTL. */
int
use_return_insn ()
{
int regno;
if (!reload_completed || frame_pointer_needed || get_frame_size () != 0)
return 0;
/* Copied from output_function_epilogue (). We should probably create a
separate layout routine to perform the common work. */
for (regno = 0 ; regno < FIRST_PSEUDO_REGISTER ; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
return 0;
return 1;
}
/* This function generates the assembly code for function exit,
on machines that need it. Args are same as for FUNCTION_PROLOGUE.
The function epilogue should not depend on the current stack pointer!
It should use the frame pointer only, if there is a frame pointer.
This is mandatory because of alloca; we also take advantage of it to
omit stack adjustments before returning. */
void
output_function_epilogue (stream, size)
FILE *stream;
int size;
{
register int regno;
register int mask, fmask;
register int nregs;
int offset, foffset, fpoffset;
extern char call_used_regs[];
int fsize = (size + 3) & -4;
int big = 0;
rtx insn = get_last_insn ();
int restore_from_sp = 0;
/* If the last insn was a BARRIER, we don't have to write any code. */
if (GET_CODE (insn) == NOTE)
insn = prev_nonnote_insn (insn);
if (insn && GET_CODE (insn) == BARRIER)
{
/* Output just a no-op so that debuggers don't get confused
about which function the pc is in at this address. */
asm_fprintf (stream, "\tnop\n");
return;
}
#ifdef FUNCTION_BLOCK_PROFILER_EXIT
if (profile_block_flag == 2)
{
FUNCTION_BLOCK_PROFILER_EXIT (stream);
}
#endif
#ifdef FUNCTION_EXTRA_EPILOGUE
FUNCTION_EXTRA_EPILOGUE (stream, size);
#endif
nregs = 0; fmask = 0; fpoffset = 0;
#ifdef SUPPORT_SUN_FPA
for (regno = 24 ; regno < 56 ; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
nregs++;
fpoffset = nregs * 8;
#endif
nregs = 0;
if (TARGET_68881)
{
for (regno = 16; regno < 24; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
{
nregs++;
fmask |= 1 << (23 - regno);
}
}
foffset = fpoffset + nregs * 12;
nregs = 0; mask = 0;
if (frame_pointer_needed)
regs_ever_live[FRAME_POINTER_REGNUM] = 0;
for (regno = 0; regno < 16; regno++)
if (regs_ever_live[regno] && ! call_used_regs[regno])
{
nregs++;
mask |= 1 << regno;
}
offset = foffset + nregs * 4;
/* FIXME : leaf_function_p below is too strong.
What we really need to know there is if there could be pending
stack adjustment needed at that point. */
restore_from_sp = ! frame_pointer_needed
|| (! current_function_calls_alloca && leaf_function_p ());
if (offset + fsize >= 0x8000
&& ! restore_from_sp
&& (mask || fmask || fpoffset))
{
#ifdef MOTOROLA
asm_fprintf (stream, "\t%Omove.l %0I%d,%Ra1\n", -fsize);
#else
asm_fprintf (stream, "\tmovel %0I%d,%Ra1\n", -fsize);
#endif
fsize = 0, big = 1;
}
if (TARGET_5200 || nregs <= 2)
{
/* Restore each separately in the same order moveml does.
Using two movel instructions instead of a single moveml
is about 15% faster for the 68020 and 68030 at no expense
in code size. */
int i;
/* Undo the work from above. */
for (i = 0; i< 16; i++)
if (mask & (1 << i))
{
if (big)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\t%Omove.l -%d(%s,%Ra1.l),%s\n",
offset + fsize,
reg_names[FRAME_POINTER_REGNUM],
reg_names[i]);
#else
asm_fprintf (stream, "\tmovel %s@(-%d,%Ra1:l),%s\n",
reg_names[FRAME_POINTER_REGNUM],
offset + fsize, reg_names[i]);
#endif
}
else if (restore_from_sp)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\t%Omove.l (%Rsp)+,%s\n",
reg_names[i]);
#else
asm_fprintf (stream, "\tmovel %Rsp@+,%s\n",
reg_names[i]);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\t%Omove.l -%d(%s),%s\n",
offset + fsize,
reg_names[FRAME_POINTER_REGNUM],
reg_names[i]);
#else
asm_fprintf (stream, "\tmovel %s@(-%d),%s\n",
reg_names[FRAME_POINTER_REGNUM],
offset + fsize, reg_names[i]);
#endif
}
offset = offset - 4;
}
}
else if (mask)
{
if (big)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tmovm.l -%d(%s,%Ra1.l),%0I0x%x\n",
offset + fsize,
reg_names[FRAME_POINTER_REGNUM],
mask);
#else
asm_fprintf (stream, "\tmoveml %s@(-%d,%Ra1:l),%0I0x%x\n",
reg_names[FRAME_POINTER_REGNUM],
offset + fsize, mask);
#endif
}
else if (restore_from_sp)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tmovm.l (%Rsp)+,%0I0x%x\n", mask);
#else
asm_fprintf (stream, "\tmoveml %Rsp@+,%0I0x%x\n", mask);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tmovm.l -%d(%s),%0I0x%x\n",
offset + fsize,
reg_names[FRAME_POINTER_REGNUM],
mask);
#else
asm_fprintf (stream, "\tmoveml %s@(-%d),%0I0x%x\n",
reg_names[FRAME_POINTER_REGNUM],
offset + fsize, mask);
#endif
}
}
if (fmask)
{
if (big)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfmovm -%d(%s,%Ra1.l),%0I0x%x\n",
foffset + fsize,
reg_names[FRAME_POINTER_REGNUM],
fmask);
#else
asm_fprintf (stream, "\tfmovem %s@(-%d,%Ra1:l),%0I0x%x\n",
reg_names[FRAME_POINTER_REGNUM],
foffset + fsize, fmask);
#endif
}
else if (restore_from_sp)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfmovm (%Rsp)+,%0I0x%x\n", fmask);
#else
asm_fprintf (stream, "\tfmovem %Rsp@+,%0I0x%x\n", fmask);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfmovm -%d(%s),%0I0x%x\n",
foffset + fsize,
reg_names[FRAME_POINTER_REGNUM],
fmask);
#else
asm_fprintf (stream, "\tfmovem %s@(-%d),%0I0x%x\n",
reg_names[FRAME_POINTER_REGNUM],
foffset + fsize, fmask);
#endif
}
}
if (fpoffset != 0)
for (regno = 55; regno >= 24; regno--)
if (regs_ever_live[regno] && ! call_used_regs[regno])
{
if (big)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfpmovd -%d(%s,%Ra1.l), %s\n",
fpoffset + fsize,
reg_names[FRAME_POINTER_REGNUM],
reg_names[regno]);
#else
asm_fprintf (stream, "\tfpmoved %s@(-%d,%Ra1:l), %s\n",
reg_names[FRAME_POINTER_REGNUM],
fpoffset + fsize, reg_names[regno]);
#endif
}
else if (restore_from_sp)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfpmovd (%Rsp)+,%s\n",
reg_names[regno]);
#else
asm_fprintf (stream, "\tfpmoved %Rsp@+, %s\n",
reg_names[regno]);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tfpmovd -%d(%s), %s\n",
fpoffset + fsize,
reg_names[FRAME_POINTER_REGNUM],
reg_names[regno]);
#else
asm_fprintf (stream, "\tfpmoved %s@(-%d), %s\n",
reg_names[FRAME_POINTER_REGNUM],
fpoffset + fsize, reg_names[regno]);
#endif
}
fpoffset -= 8;
}
if (frame_pointer_needed)
fprintf (stream, "\tunlk %s\n",
reg_names[FRAME_POINTER_REGNUM]);
else if (fsize)
{
#ifdef NO_ADDSUB_Q
if (fsize + 4 <= 8)
{
if (!TARGET_5200)
{
#ifdef MOTOROLA
asm_fprintf (stream, "\taddq.w %OI%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\taddqw %OI%d,%Rsp\n", fsize + 4);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\taddq.l %OI%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\taddql %OI%d,%Rsp\n", fsize + 4);
#endif
}
}
else if (fsize + 4 <= 16 && TARGET_CPU32)
{
/* On the CPU32 it is faster to use two addqw instructions to
add a small integer (8 < N <= 16) to a register. */
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\taddq.w %OI8,%Rsp\n\taddq.w %OI%d,%Rsp\n",
fsize + 4);
#else
asm_fprintf (stream, "\taddqw %OI8,%Rsp\n\taddqw %OI%d,%Rsp\n",
fsize + 4);
#endif
}
else
#endif /* NO_ADDSUB_Q */
if (fsize + 4 < 0x8000)
{
if (TARGET_68040)
{
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tadd.w %0I%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\taddw %0I%d,%Rsp\n", fsize + 4);
#endif
}
else
{
#ifdef MOTOROLA
asm_fprintf (stream, "\tlea (%d,%Rsp),%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\tlea %Rsp@(%d),%Rsp\n", fsize + 4);
#endif
}
}
else
{
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tadd.l %0I%d,%Rsp\n", fsize + 4);
#else
asm_fprintf (stream, "\taddl %0I%d,%Rsp\n", fsize + 4);
#endif
}
}
if (current_function_pops_args)
asm_fprintf (stream, "\trtd %0I%d\n", current_function_pops_args);
else
fprintf (stream, "\trts\n");
}
/* Similar to general_operand, but exclude stack_pointer_rtx. */
int
not_sp_operand (op, mode)
register rtx op;
enum machine_mode mode;
{
return op != stack_pointer_rtx && general_operand (op, mode);
}
/* Return TRUE if X is a valid comparison operator for the dbcc
instruction.
Note it rejects floating point comparison operators.
(In the future we could use Fdbcc).
It also rejects some comparisons when CC_NO_OVERFLOW is set. */
int
valid_dbcc_comparison_p (x, mode)
rtx x;
enum machine_mode mode;
{
switch (GET_CODE (x))
{
case EQ: case NE: case GTU: case LTU:
case GEU: case LEU:
return 1;
/* Reject some when CC_NO_OVERFLOW is set. This may be over
conservative */
case GT: case LT: case GE: case LE:
return ! (cc_prev_status.flags & CC_NO_OVERFLOW);
default:
return 0;
}
}
/* Return non-zero if flags are currently in the 68881 flag register. */
int
flags_in_68881 ()
{
/* We could add support for these in the future */
return cc_status.flags & CC_IN_68881;
}
/* Output a dbCC; jCC sequence. Note we do not handle the
floating point version of this sequence (Fdbcc). We also
do not handle alternative conditions when CC_NO_OVERFLOW is
set. It is assumed that valid_dbcc_comparison_p and flags_in_68881 will
kick those out before we get here. */
output_dbcc_and_branch (operands)
rtx *operands;
{
switch (GET_CODE (operands[3]))
{
case EQ:
#ifdef MOTOROLA
output_asm_insn ("dbeq %0,%l1\n\tjbeq %l2", operands);
#else
output_asm_insn ("dbeq %0,%l1\n\tjeq %l2", operands);
#endif
break;
case NE:
#ifdef MOTOROLA
output_asm_insn ("dbne %0,%l1\n\tjbne %l2", operands);
#else
output_asm_insn ("dbne %0,%l1\n\tjne %l2", operands);
#endif
break;
case GT:
#ifdef MOTOROLA
output_asm_insn ("dbgt %0,%l1\n\tjbgt %l2", operands);
#else
output_asm_insn ("dbgt %0,%l1\n\tjgt %l2", operands);
#endif
break;
case GTU:
#ifdef MOTOROLA
output_asm_insn ("dbhi %0,%l1\n\tjbhi %l2", operands);
#else
output_asm_insn ("dbhi %0,%l1\n\tjhi %l2", operands);
#endif
break;
case LT:
#ifdef MOTOROLA
output_asm_insn ("dblt %0,%l1\n\tjblt %l2", operands);
#else
output_asm_insn ("dblt %0,%l1\n\tjlt %l2", operands);
#endif
break;
case LTU:
#ifdef MOTOROLA
output_asm_insn ("dbcs %0,%l1\n\tjbcs %l2", operands);
#else
output_asm_insn ("dbcs %0,%l1\n\tjcs %l2", operands);
#endif
break;
case GE:
#ifdef MOTOROLA
output_asm_insn ("dbge %0,%l1\n\tjbge %l2", operands);
#else
output_asm_insn ("dbge %0,%l1\n\tjge %l2", operands);
#endif
break;
case GEU:
#ifdef MOTOROLA
output_asm_insn ("dbcc %0,%l1\n\tjbcc %l2", operands);
#else
output_asm_insn ("dbcc %0,%l1\n\tjcc %l2", operands);
#endif
break;
case LE:
#ifdef MOTOROLA
output_asm_insn ("dble %0,%l1\n\tjble %l2", operands);
#else
output_asm_insn ("dble %0,%l1\n\tjle %l2", operands);
#endif
break;
case LEU:
#ifdef MOTOROLA
output_asm_insn ("dbls %0,%l1\n\tjbls %l2", operands);
#else
output_asm_insn ("dbls %0,%l1\n\tjls %l2", operands);
#endif
break;
default:
abort ();
}
/* If the decrement is to be done in SImode, then we have
to compensate for the fact that dbcc decrements in HImode. */
switch (GET_MODE (operands[0]))
{
case SImode:
#ifdef MOTOROLA
output_asm_insn ("clr%.w %0\n\tsubq%.l %#1,%0\n\tjbpl %l1", operands);
#else
output_asm_insn ("clr%.w %0\n\tsubq%.l %#1,%0\n\tjpl %l1", operands);
#endif
break;
case HImode:
break;
default:
abort ();
}
}
char *
output_scc_di(op, operand1, operand2, dest)
rtx op;
rtx operand1;
rtx operand2;
rtx dest;
{
rtx loperands[7];
enum rtx_code op_code = GET_CODE (op);
/* This does not produce a usefull cc. */
CC_STATUS_INIT;
/* The m68k cmp.l instruction requires operand1 to be a reg as used
below. Swap the operands and change the op if these requirements
are not fulfilled. */
if (GET_CODE (operand2) == REG && GET_CODE (operand1) != REG)
{
rtx tmp = operand1;
operand1 = operand2;
operand2 = tmp;
op_code = swap_condition (op_code);
}
loperands[0] = operand1;
if (GET_CODE (operand1) == REG)
loperands[1] = gen_rtx (REG, SImode, REGNO (operand1) + 1);
else
loperands[1] = adj_offsettable_operand (operand1, 4);
if (operand2 != const0_rtx)
{
loperands[2] = operand2;
if (GET_CODE (operand2) == REG)
loperands[3] = gen_rtx (REG, SImode, REGNO (operand2) + 1);
else
loperands[3] = adj_offsettable_operand (operand2, 4);
}
loperands[4] = gen_label_rtx();
if (operand2 != const0_rtx)
#ifdef MOTOROLA
#ifdef SGS_CMP_ORDER
output_asm_insn ("cmp%.l %0,%2\n\tjbne %l4\n\tcmp%.l %1,%3", loperands);
#else
output_asm_insn ("cmp%.l %2,%0\n\tjbne %l4\n\tcmp%.l %3,%1", loperands);
#endif
#else
#ifdef SGS_CMP_ORDER
output_asm_insn ("cmp%.l %0,%2\n\tjne %l4\n\tcmp%.l %1,%3", loperands);
#else
output_asm_insn ("cmp%.l %2,%0\n\tjne %l4\n\tcmp%.l %3,%1", loperands);
#endif
#endif
else
#ifdef MOTOROLA
output_asm_insn ("tst%.l %0\n\tjbne %l4\n\ttst%.l %1", loperands);
#else
output_asm_insn ("tst%.l %0\n\tjne %l4\n\ttst%.l %1", loperands);
#endif
loperands[5] = dest;
switch (op_code)
{
case EQ:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("seq %5", loperands);
break;
case NE:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("sne %5", loperands);
break;
case GT:
loperands[6] = gen_label_rtx();
#ifdef MOTOROLA
output_asm_insn ("shi %5\n\tjbra %l6", loperands);
#else
output_asm_insn ("shi %5\n\tjra %l6", loperands);
#endif
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("sgt %5", loperands);
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[6]));
break;
case GTU:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("shi %5", loperands);
break;
case LT:
loperands[6] = gen_label_rtx();
#ifdef MOTOROLA
output_asm_insn ("scs %5\n\tjbra %l6", loperands);
#else
output_asm_insn ("scs %5\n\tjra %l6", loperands);
#endif
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("slt %5", loperands);
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[6]));
break;
case LTU:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("scs %5", loperands);
break;
case GE:
loperands[6] = gen_label_rtx();
#ifdef MOTOROLA
output_asm_insn ("scc %5\n\tjbra %l6", loperands);
#else
output_asm_insn ("scc %5\n\tjra %l6", loperands);
#endif
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("sge %5", loperands);
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[6]));
break;
case GEU:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("scc %5", loperands);
break;
case LE:
loperands[6] = gen_label_rtx();
#ifdef MOTOROLA
output_asm_insn ("sls %5\n\tjbra %l6", loperands);
#else
output_asm_insn ("sls %5\n\tjra %l6", loperands);
#endif
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("sle %5", loperands);
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[6]));
break;
case LEU:
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
CODE_LABEL_NUMBER (loperands[4]));
output_asm_insn ("sls %5", loperands);
break;
default:
abort ();
}
return "";
}
char *
output_btst (operands, countop, dataop, insn, signpos)
rtx *operands;
rtx countop, dataop;
rtx insn;
int signpos;
{
operands[0] = countop;
operands[1] = dataop;
if (GET_CODE (countop) == CONST_INT)
{
register int count = INTVAL (countop);
/* If COUNT is bigger than size of storage unit in use,
advance to the containing unit of same size. */
if (count > signpos)
{
int offset = (count & ~signpos) / 8;
count = count & signpos;
operands[1] = dataop = adj_offsettable_operand (dataop, offset);
}
if (count == signpos)
cc_status.flags = CC_NOT_POSITIVE | CC_Z_IN_NOT_N;
else
cc_status.flags = CC_NOT_NEGATIVE | CC_Z_IN_NOT_N;
/* These three statements used to use next_insns_test_no...
but it appears that this should do the same job. */
if (count == 31
&& next_insn_tests_no_inequality (insn))
return "tst%.l %1";
if (count == 15
&& next_insn_tests_no_inequality (insn))
return "tst%.w %1";
if (count == 7
&& next_insn_tests_no_inequality (insn))
return "tst%.b %1";
cc_status.flags = CC_NOT_NEGATIVE;
}
return "btst %0,%1";
}
/* Returns 1 if OP is either a symbol reference or a sum of a symbol
reference and a constant. */
int
symbolic_operand (op, mode)
register rtx op;
enum machine_mode mode;
{
switch (GET_CODE (op))
{
case SYMBOL_REF:
case LABEL_REF:
return 1;
case CONST:
op = XEXP (op, 0);
return ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (op, 0)) == LABEL_REF)
&& GET_CODE (XEXP (op, 1)) == CONST_INT);
#if 0 /* Deleted, with corresponding change in m68k.h,
so as to fit the specs. No CONST_DOUBLE is ever symbolic. */
case CONST_DOUBLE:
return GET_MODE (op) == mode;
#endif
default:
return 0;
}
}
/* Check for sign_extend or zero_extend. Used for bit-count operands. */
int
extend_operator(x, mode)
rtx x;
enum machine_mode mode;
{
if (mode != VOIDmode && GET_MODE(x) != mode)
return 0;
switch (GET_CODE(x))
{
case SIGN_EXTEND :
case ZERO_EXTEND :
return 1;
default :
return 0;
}
}
/* Legitimize PIC addresses. If the address is already
position-independent, we return ORIG. Newly generated
position-independent addresses go to REG. If we need more
than one register, we lose.
An address is legitimized by making an indirect reference
through the Global Offset Table with the name of the symbol
used as an offset.
The assembler and linker are responsible for placing the
address of the symbol in the GOT. The function prologue
is responsible for initializing a5 to the starting address
of the GOT.
The assembler is also responsible for translating a symbol name
into a constant displacement from the start of the GOT.
A quick example may make things a little clearer:
When not generating PIC code to store the value 12345 into _foo
we would generate the following code:
movel #12345, _foo
When generating PIC two transformations are made. First, the compiler
loads the address of foo into a register. So the first transformation makes:
lea _foo, a0
movel #12345, a0@
The code in movsi will intercept the lea instruction and call this
routine which will transform the instructions into:
movel a5@(_foo:w), a0
movel #12345, a0@
That (in a nutshell) is how *all* symbol and label references are
handled. */
rtx
legitimize_pic_address (orig, mode, reg)
rtx orig, reg;
enum machine_mode mode;
{
rtx pic_ref = orig;
/* First handle a simple SYMBOL_REF or LABEL_REF */
if (GET_CODE (orig) == SYMBOL_REF || GET_CODE (orig) == LABEL_REF)
{
if (reg == 0)
abort ();
pic_ref = gen_rtx (MEM, Pmode,
gen_rtx (PLUS, Pmode,
pic_offset_table_rtx, orig));
current_function_uses_pic_offset_table = 1;
RTX_UNCHANGING_P (pic_ref) = 1;
emit_move_insn (reg, pic_ref);
return reg;
}
else if (GET_CODE (orig) == CONST)
{
rtx base, offset;
/* Make sure this is CONST has not already been legitimized */
if (GET_CODE (XEXP (orig, 0)) == PLUS
&& XEXP (XEXP (orig, 0), 0) == pic_offset_table_rtx)
return orig;
if (reg == 0)
abort ();
/* legitimize both operands of the PLUS */
if (GET_CODE (XEXP (orig, 0)) == PLUS)
{
base = legitimize_pic_address (XEXP (XEXP (orig, 0), 0), Pmode, reg);
orig = legitimize_pic_address (XEXP (XEXP (orig, 0), 1), Pmode,
base == reg ? 0 : reg);
}
else abort ();
if (GET_CODE (orig) == CONST_INT)
return plus_constant_for_output (base, INTVAL (orig));
pic_ref = gen_rtx (PLUS, Pmode, base, orig);
/* Likewise, should we set special REG_NOTEs here? */
}
return pic_ref;
}
typedef enum { MOVL, SWAP, NEGW, NOTW, NOTB, MOVQ } CONST_METHOD;
#define USE_MOVQ(i) ((unsigned)((i) + 128) <= 255)
CONST_METHOD
const_method (constant)
rtx constant;
{
int i;
unsigned u;
i = INTVAL (constant);
if (USE_MOVQ (i))
return MOVQ;
/* The Coldfire doesn't have byte or word operations. */
/* FIXME: This may not be useful for the m68060 either */
if (!TARGET_5200)
{
/* if -256 < N < 256 but N is not in range for a moveq
N^ff will be, so use moveq #N^ff, dreg; not.b dreg. */
if (USE_MOVQ (i ^ 0xff))
return NOTB;
/* Likewise, try with not.w */
if (USE_MOVQ (i ^ 0xffff))
return NOTW;
/* This is the only value where neg.w is useful */
if (i == -65408)
return NEGW;
/* Try also with swap */
u = i;
if (USE_MOVQ ((u >> 16) | (u << 16)))
return SWAP;
}
/* Otherwise, use move.l */
return MOVL;
}
const_int_cost (constant)
rtx constant;
{
switch (const_method (constant))
{
case MOVQ :
/* Constants between -128 and 127 are cheap due to moveq */
return 0;
case NOTB :
case NOTW :
case NEGW :
case SWAP :
/* Constants easily generated by moveq + not.b/not.w/neg.w/swap */
return 1;
case MOVL :
return 2;
default :
abort ();
}
}
char *
output_move_const_into_data_reg (operands)
rtx *operands;
{
int i;
i = INTVAL (operands[1]);
switch (const_method (operands[1]))
{
case MOVQ :
#if defined (MOTOROLA) && !defined (CRDS)
return "moveq%.l %1,%0";
#else
return "moveq %1,%0";
#endif
case NOTB :
operands[1] = gen_rtx (CONST_INT, VOIDmode, i ^ 0xff);
#if defined (MOTOROLA) && !defined (CRDS)
return "moveq%.l %1,%0\n\tnot%.b %0";
#else
return "moveq %1,%0\n\tnot%.b %0";
#endif
case NOTW :
operands[1] = gen_rtx (CONST_INT, VOIDmode, i ^ 0xffff);
#if defined (MOTOROLA) && !defined (CRDS)
return "moveq%.l %1,%0\n\tnot%.w %0";
#else
return "moveq %1,%0\n\tnot%.w %0";
#endif
case NEGW :
#if defined (MOTOROLA) && !defined (CRDS)
return "moveq%.l %#-128,%0\n\tneg%.w %0";
#else
return "moveq %#-128,%0\n\tneg%.w %0";
#endif
case SWAP :
{
unsigned u = i;
operands[1] = gen_rtx (CONST_INT, VOIDmode, (u << 16) | (u >> 16));
#if defined (MOTOROLA) && !defined (CRDS)
return "moveq%.l %1,%0\n\tswap %0";
#else
return "moveq %1,%0\n\tswap %0";
#endif
}
case MOVL :
return "move%.l %1,%0";
default :
abort ();
}
}
char *
output_move_simode_const (operands)
rtx *operands;
{
if (operands[1] == const0_rtx
&& (DATA_REG_P (operands[0])
|| GET_CODE (operands[0]) == MEM)
/* clr insns on 68000 read before writing.
This isn't so on the 68010, but we have no TARGET_68010. */
&& ((TARGET_68020 || TARGET_5200)
|| !(GET_CODE (operands[0]) == MEM
&& MEM_VOLATILE_P (operands[0]))))
return "clr%.l %0";
else if (DATA_REG_P (operands[0]))
return output_move_const_into_data_reg (operands);
else if (ADDRESS_REG_P (operands[0])
&& INTVAL (operands[1]) < 0x8000
&& INTVAL (operands[1]) >= -0x8000)
return "move%.w %1,%0";
else if (GET_CODE (operands[0]) == MEM
&& GET_CODE (XEXP (operands[0], 0)) == PRE_DEC
&& REGNO (XEXP (XEXP (operands[0], 0), 0)) == STACK_POINTER_REGNUM
&& INTVAL (operands[1]) < 0x8000
&& INTVAL (operands[1]) >= -0x8000)
return "pea %a1";
return "move%.l %1,%0";
}
char *
output_move_simode (operands)
rtx *operands;
{
if (GET_CODE (operands[1]) == CONST_INT)
return output_move_simode_const (operands);
else if ((GET_CODE (operands[1]) == SYMBOL_REF
|| GET_CODE (operands[1]) == CONST)
&& push_operand (operands[0], SImode))
return "pea %a1";
else if ((GET_CODE (operands[1]) == SYMBOL_REF
|| GET_CODE (operands[1]) == CONST)
&& ADDRESS_REG_P (operands[0]))
return "lea %a1,%0";
return "move%.l %1,%0";
}
char *
output_move_himode (operands)
rtx *operands;
{
if (GET_CODE (operands[1]) == CONST_INT)
{
if (operands[1] == const0_rtx
&& (DATA_REG_P (operands[0])
|| GET_CODE (operands[0]) == MEM)
/* clr insns on 68000 read before writing.
This isn't so on the 68010, but we have no TARGET_68010. */
&& ((TARGET_68020 || TARGET_5200)
|| !(GET_CODE (operands[0]) == MEM
&& MEM_VOLATILE_P (operands[0]))))
return "clr%.w %0";
else if (DATA_REG_P (operands[0])
&& INTVAL (operands[1]) < 128
&& INTVAL (operands[1]) >= -128)
{
#if defined(MOTOROLA) && !defined(CRDS)
return "moveq%.l %1,%0";
#else
return "moveq %1,%0";
#endif
}
else if (INTVAL (operands[1]) < 0x8000
&& INTVAL (operands[1]) >= -0x8000)
return "move%.w %1,%0";
}
else if (CONSTANT_P (operands[1]))
return "move%.l %1,%0";
#ifndef SGS_NO_LI
/* Recognize the insn before a tablejump, one that refers
to a table of offsets. Such an insn will need to refer
to a label on the insn. So output one. Use the label-number
of the table of offsets to generate this label. This code,
and similar code below, assumes that there will be at most one
reference to each table. */
if (GET_CODE (operands[1]) == MEM
&& GET_CODE (XEXP (operands[1], 0)) == PLUS
&& GET_CODE (XEXP (XEXP (operands[1], 0), 1)) == LABEL_REF
&& GET_CODE (XEXP (XEXP (operands[1], 0), 0)) != PLUS)
{
rtx labelref = XEXP (XEXP (operands[1], 0), 1);
#if defined (MOTOROLA) && !defined (SGS_SWITCH_TABLES)
#ifdef SGS
asm_fprintf (asm_out_file, "\tset %LLI%d,.+2\n",
CODE_LABEL_NUMBER (XEXP (labelref, 0)));
#else /* not SGS */
asm_fprintf (asm_out_file, "\t.set %LLI%d,.+2\n",
CODE_LABEL_NUMBER (XEXP (labelref, 0)));
#endif /* not SGS */
#else /* SGS_SWITCH_TABLES or not MOTOROLA */
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LI",
CODE_LABEL_NUMBER (XEXP (labelref, 0)));
#ifdef SGS_SWITCH_TABLES
/* Set flag saying we need to define the symbol
LD%n (with value L%n-LI%n) at the end of the switch table. */
switch_table_difference_label_flag = 1;
#endif /* SGS_SWITCH_TABLES */
#endif /* SGS_SWITCH_TABLES or not MOTOROLA */
}
#endif /* SGS_NO_LI */
return "move%.w %1,%0";
}
char *
output_move_qimode (operands)
rtx *operands;
{
rtx xoperands[4];
/* This is probably useless, since it loses for pushing a struct
of several bytes a byte at a time. */
/* 68k family always modifies the stack pointer by at least 2, even for
byte pushes. The 5200 (coldfire) does not do this. */
if (GET_CODE (operands[0]) == MEM
&& GET_CODE (XEXP (operands[0], 0)) == PRE_DEC
&& XEXP (XEXP (operands[0], 0), 0) == stack_pointer_rtx
&& ! ADDRESS_REG_P (operands[1])
&& ! TARGET_5200)
{
xoperands[1] = operands[1];
xoperands[2]
= gen_rtx (MEM, QImode,
gen_rtx (PLUS, VOIDmode, stack_pointer_rtx, const1_rtx));
/* Just pushing a byte puts it in the high byte of the halfword. */
/* We must put it in the low-order, high-numbered byte. */
if (!reg_mentioned_p (stack_pointer_rtx, operands[1]))
{
xoperands[3] = stack_pointer_rtx;
#ifndef NO_ADDSUB_Q
output_asm_insn ("subq%.l %#2,%3\n\tmove%.b %1,%2", xoperands);
#else
output_asm_insn ("sub%.l %#2,%3\n\tmove%.b %1,%2", xoperands);
#endif
}
else
output_asm_insn ("move%.b %1,%-\n\tmove%.b %@,%2", xoperands);
return "";
}
/* clr and st insns on 68000 read before writing.
This isn't so on the 68010, but we have no TARGET_68010. */
if (!ADDRESS_REG_P (operands[0])
&& ((TARGET_68020 || TARGET_5200)
|| !(GET_CODE (operands[0]) == MEM && MEM_VOLATILE_P (operands[0]))))
{
if (operands[1] == const0_rtx)
return "clr%.b %0";
if ((!TARGET_5200 || DATA_REG_P (operands[0]))
&& GET_CODE (operands[1]) == CONST_INT
&& (INTVAL (operands[1]) & 255) == 255)
{
CC_STATUS_INIT;
return "st %0";
}
}
if (GET_CODE (operands[1]) == CONST_INT
&& DATA_REG_P (operands[0])
&& INTVAL (operands[1]) < 128
&& INTVAL (operands[1]) >= -128)
{
#if defined(MOTOROLA) && !defined(CRDS)
return "moveq%.l %1,%0";
#else
return "moveq %1,%0";
#endif
}
if (GET_CODE (operands[1]) != CONST_INT && CONSTANT_P (operands[1]))
return "move%.l %1,%0";
/* 68k family doesn't support byte moves to from address registers. The
5200 (coldfire) does not have this restriction. */
if ((ADDRESS_REG_P (operands[0]) || ADDRESS_REG_P (operands[1]))
&& ! TARGET_5200)
return "move%.w %1,%0";
return "move%.b %1,%0";
}
char *
output_move_stricthi (operands)
rtx *operands;
{
if (operands[1] == const0_rtx
/* clr insns on 68000 read before writing.
This isn't so on the 68010, but we have no TARGET_68010. */
&& ((TARGET_68020 || TARGET_5200)
|| !(GET_CODE (operands[0]) == MEM && MEM_VOLATILE_P (operands[0]))))
return "clr%.w %0";
return "move%.w %1,%0";
}
char *
output_move_strictqi (operands)
rtx *operands;
{
if (operands[1] == const0_rtx
/* clr insns on 68000 read before writing.
This isn't so on the 68010, but we have no TARGET_68010. */
&& ((TARGET_68020 || TARGET_5200)
|| !(GET_CODE (operands[0]) == MEM && MEM_VOLATILE_P (operands[0]))))
return "clr%.b %0";
return "move%.b %1,%0";
}
/* Return the best assembler insn template
for moving operands[1] into operands[0] as a fullword. */
static char *
singlemove_string (operands)
rtx *operands;
{
#ifdef SUPPORT_SUN_FPA
if (FPA_REG_P (operands[0]) || FPA_REG_P (operands[1]))
return "fpmoves %1,%0";
#endif
if (GET_CODE (operands[1]) == CONST_INT)
return output_move_simode_const (operands);
return "move%.l %1,%0";
}
/* Output assembler code to perform a doubleword move insn
with operands OPERANDS. */
char *
output_move_double (operands)
rtx *operands;
{
enum
{
REGOP, OFFSOP, MEMOP, PUSHOP, POPOP, CNSTOP, RNDOP
} optype0, optype1;
rtx latehalf[2];
rtx middlehalf[2];
rtx xops[2];
rtx addreg0 = 0, addreg1 = 0;
int dest_overlapped_low = 0;
int size = GET_MODE_SIZE (GET_MODE (operands[0]));
middlehalf[0] = 0;
middlehalf[1] = 0;
/* First classify both operands. */
if (REG_P (operands[0]))
optype0 = REGOP;
else if (offsettable_memref_p (operands[0]))
optype0 = OFFSOP;
else if (GET_CODE (XEXP (operands[0], 0)) == POST_INC)
optype0 = POPOP;
else if (GET_CODE (XEXP (operands[0], 0)) == PRE_DEC)
optype0 = PUSHOP;
else if (GET_CODE (operands[0]) == MEM)
optype0 = MEMOP;
else
optype0 = RNDOP;
if (REG_P (operands[1]))
optype1 = REGOP;
else if (CONSTANT_P (operands[1]))
optype1 = CNSTOP;
else if (offsettable_memref_p (operands[1]))
optype1 = OFFSOP;
else if (GET_CODE (XEXP (operands[1], 0)) == POST_INC)
optype1 = POPOP;
else if (GET_CODE (XEXP (operands[1], 0)) == PRE_DEC)
optype1 = PUSHOP;
else if (GET_CODE (operands[1]) == MEM)
optype1 = MEMOP;
else
optype1 = RNDOP;
/* Check for the cases that the operand constraints are not
supposed to allow to happen. Abort if we get one,
because generating code for these cases is painful. */
if (optype0 == RNDOP || optype1 == RNDOP)
abort ();
/* If one operand is decrementing and one is incrementing
decrement the former register explicitly
and change that operand into ordinary indexing. */
if (optype0 == PUSHOP && optype1 == POPOP)
{
operands[0] = XEXP (XEXP (operands[0], 0), 0);
if (size == 12)
output_asm_insn ("sub%.l %#12,%0", operands);
else
output_asm_insn ("subq%.l %#8,%0", operands);
if (GET_MODE (operands[1]) == XFmode)
operands[0] = gen_rtx (MEM, XFmode, operands[0]);
else if (GET_MODE (operands[0]) == DFmode)
operands[0] = gen_rtx (MEM, DFmode, operands[0]);
else
operands[0] = gen_rtx (MEM, DImode, operands[0]);
optype0 = OFFSOP;
}
if (optype0 == POPOP && optype1 == PUSHOP)
{
operands[1] = XEXP (XEXP (operands[1], 0), 0);
if (size == 12)
output_asm_insn ("sub%.l %#12,%1", operands);
else
output_asm_insn ("subq%.l %#8,%1", operands);
if (GET_MODE (operands[1]) == XFmode)
operands[1] = gen_rtx (MEM, XFmode, operands[1]);
else if (GET_MODE (operands[1]) == DFmode)
operands[1] = gen_rtx (MEM, DFmode, operands[1]);
else
operands[1] = gen_rtx (MEM, DImode, operands[1]);
optype1 = OFFSOP;
}
/* If an operand is an unoffsettable memory ref, find a register
we can increment temporarily to make it refer to the second word. */
if (optype0 == MEMOP)
addreg0 = find_addr_reg (XEXP (operands[0], 0));
if (optype1 == MEMOP)
addreg1 = find_addr_reg (XEXP (operands[1], 0));
/* Ok, we can do one word at a time.
Normally we do the low-numbered word first,
but if either operand is autodecrementing then we
do the high-numbered word first.
In either case, set up in LATEHALF the operands to use
for the high-numbered word and in some cases alter the
operands in OPERANDS to be suitable for the low-numbered word. */
if (size == 12)
{
if (optype0 == REGOP)
{
latehalf[0] = gen_rtx (REG, SImode, REGNO (operands[0]) + 2);
middlehalf[0] = gen_rtx (REG, SImode, REGNO (operands[0]) + 1);
}
else if (optype0 == OFFSOP)
{
middlehalf[0] = adj_offsettable_operand (operands[0], 4);
latehalf[0] = adj_offsettable_operand (operands[0], size - 4);
}
else
{
middlehalf[0] = operands[0];
latehalf[0] = operands[0];
}
if (optype1 == REGOP)
{
latehalf[1] = gen_rtx (REG, SImode, REGNO (operands[1]) + 2);
middlehalf[1] = gen_rtx (REG, SImode, REGNO (operands[1]) + 1);
}
else if (optype1 == OFFSOP)
{
middlehalf[1] = adj_offsettable_operand (operands[1], 4);
latehalf[1] = adj_offsettable_operand (operands[1], size - 4);
}
else if (optype1 == CNSTOP)
{
if (GET_CODE (operands[1]) == CONST_DOUBLE)
{
REAL_VALUE_TYPE r;
long l[3];
REAL_VALUE_FROM_CONST_DOUBLE (r, operands[1]);
REAL_VALUE_TO_TARGET_LONG_DOUBLE (r, l);
operands[1] = GEN_INT (l[0]);
middlehalf[1] = GEN_INT (l[1]);
latehalf[1] = GEN_INT (l[2]);
}
else if (CONSTANT_P (operands[1]))
{
/* actually, no non-CONST_DOUBLE constant should ever
appear here. */
abort ();
if (GET_CODE (operands[1]) == CONST_INT && INTVAL (operands[1]) < 0)
latehalf[1] = constm1_rtx;
else
latehalf[1] = const0_rtx;
}
}
else
{
middlehalf[1] = operands[1];
latehalf[1] = operands[1];
}
}
else
/* size is not 12: */
{
if (optype0 == REGOP)
latehalf[0] = gen_rtx (REG, SImode, REGNO (operands[0]) + 1);
else if (optype0 == OFFSOP)
latehalf[0] = adj_offsettable_operand (operands[0], size - 4);
else
latehalf[0] = operands[0];
if (optype1 == REGOP)
latehalf[1] = gen_rtx (REG, SImode, REGNO (operands[1]) + 1);
else if (optype1 == OFFSOP)
latehalf[1] = adj_offsettable_operand (operands[1], size - 4);
else if (optype1 == CNSTOP)
split_double (operands[1], &operands[1], &latehalf[1]);
else
latehalf[1] = operands[1];
}
/* If insn is effectively movd N(sp),-(sp) then we will do the
high word first. We should use the adjusted operand 1 (which is N+4(sp))
for the low word as well, to compensate for the first decrement of sp. */
if (optype0 == PUSHOP
&& REGNO (XEXP (XEXP (operands[0], 0), 0)) == STACK_POINTER_REGNUM
&& reg_overlap_mentioned_p (stack_pointer_rtx, operands[1]))
operands[1] = middlehalf[1] = latehalf[1];
/* For (set (reg:DI N) (mem:DI ... (reg:SI N) ...)),
if the upper part of reg N does not appear in the MEM, arrange to
emit the move late-half first. Otherwise, compute the MEM address
into the upper part of N and use that as a pointer to the memory
operand. */
if (optype0 == REGOP
&& (optype1 == OFFSOP || optype1 == MEMOP))
{
rtx testlow = gen_rtx (REG, SImode, REGNO (operands[0]));
if (reg_overlap_mentioned_p (testlow, XEXP (operands[1], 0))
&& reg_overlap_mentioned_p (latehalf[0], XEXP (operands[1], 0)))
{
/* If both halves of dest are used in the src memory address,
compute the address into latehalf of dest.
Note that this can't happen if the dest is two data regs. */
compadr:
xops[0] = latehalf[0];
xops[1] = XEXP (operands[1], 0);
output_asm_insn ("lea %a1,%0", xops);
if( GET_MODE (operands[1]) == XFmode )
{
operands[1] = gen_rtx (MEM, XFmode, latehalf[0]);
middlehalf[1] = adj_offsettable_operand (operands[1], size-8);
latehalf[1] = adj_offsettable_operand (operands[1], size-4);
}
else
{
operands[1] = gen_rtx (MEM, DImode, latehalf[0]);
latehalf[1] = adj_offsettable_operand (operands[1], size-4);
}
}
else if (size == 12
&& reg_overlap_mentioned_p (middlehalf[0],
XEXP (operands[1], 0)))
{
/* Check for two regs used by both source and dest.
Note that this can't happen if the dest is all data regs.
It can happen if the dest is d6, d7, a0.
But in that case, latehalf is an addr reg, so
the code at compadr does ok. */
if (reg_overlap_mentioned_p (testlow, XEXP (operands[1], 0))
|| reg_overlap_mentioned_p (latehalf[0], XEXP (operands[1], 0)))
goto compadr;
/* JRV says this can't happen: */
if (addreg0 || addreg1)
abort ();
/* Only the middle reg conflicts; simply put it last. */
output_asm_insn (singlemove_string (operands), operands);
output_asm_insn (singlemove_string (latehalf), latehalf);
output_asm_insn (singlemove_string (middlehalf), middlehalf);
return "";
}
else if (reg_overlap_mentioned_p (testlow, XEXP (operands[1], 0)))
/* If the low half of dest is mentioned in the source memory
address, the arrange to emit the move late half first. */
dest_overlapped_low = 1;
}
/* If one or both operands autodecrementing,
do the two words, high-numbered first. */
/* Likewise, the first move would clobber the source of the second one,
do them in the other order. This happens only for registers;
such overlap can't happen in memory unless the user explicitly
sets it up, and that is an undefined circumstance. */
if (optype0 == PUSHOP || optype1 == PUSHOP
|| (optype0 == REGOP && optype1 == REGOP
&& ((middlehalf[1] && REGNO (operands[0]) == REGNO (middlehalf[1]))
|| REGNO (operands[0]) == REGNO (latehalf[1])))
|| dest_overlapped_low)
{
/* Make any unoffsettable addresses point at high-numbered word. */
if (addreg0)
{
if (size == 12)
output_asm_insn ("addq%.l %#8,%0", &addreg0);
else
output_asm_insn ("addq%.l %#4,%0", &addreg0);
}
if (addreg1)
{
if (size == 12)
output_asm_insn ("addq%.l %#8,%0", &addreg1);
else
output_asm_insn ("addq%.l %#4,%0", &addreg1);
}
/* Do that word. */
output_asm_insn (singlemove_string (latehalf), latehalf);
/* Undo the adds we just did. */
if (addreg0)
output_asm_insn ("subq%.l %#4,%0", &addreg0);
if (addreg1)
output_asm_insn ("subq%.l %#4,%0", &addreg1);
if (size == 12)
{
output_asm_insn (singlemove_string (middlehalf), middlehalf);
if (addreg0)
output_asm_insn ("subq%.l %#4,%0", &addreg0);
if (addreg1)
output_asm_insn ("subq%.l %#4,%0", &addreg1);
}
/* Do low-numbered word. */
return singlemove_string (operands);
}
/* Normal case: do the two words, low-numbered first. */
output_asm_insn (singlemove_string (operands), operands);
/* Do the middle one of the three words for long double */
if (size == 12)
{
if (addreg0)
output_asm_insn ("addq%.l %#4,%0", &addreg0);
if (addreg1)
output_asm_insn ("addq%.l %#4,%0", &addreg1);
output_asm_insn (singlemove_string (middlehalf), middlehalf);
}
/* Make any unoffsettable addresses point at high-numbered word. */
if (addreg0)
output_asm_insn ("addq%.l %#4,%0", &addreg0);
if (addreg1)
output_asm_insn ("addq%.l %#4,%0", &addreg1);
/* Do that word. */
output_asm_insn (singlemove_string (latehalf), latehalf);
/* Undo the adds we just did. */
if (addreg0)
{
if (size == 12)
output_asm_insn ("subq%.l %#8,%0", &addreg0);
else
output_asm_insn ("subq%.l %#4,%0", &addreg0);
}
if (addreg1)
{
if (size == 12)
output_asm_insn ("subq%.l %#8,%0", &addreg1);
else
output_asm_insn ("subq%.l %#4,%0", &addreg1);
}
return "";
}
/* Return a REG that occurs in ADDR with coefficient 1.
ADDR can be effectively incremented by incrementing REG. */
static rtx
find_addr_reg (addr)
rtx addr;
{
while (GET_CODE (addr) == PLUS)
{
if (GET_CODE (XEXP (addr, 0)) == REG)
addr = XEXP (addr, 0);
else if (GET_CODE (XEXP (addr, 1)) == REG)
addr = XEXP (addr, 1);
else if (CONSTANT_P (XEXP (addr, 0)))
addr = XEXP (addr, 1);
else if (CONSTANT_P (XEXP (addr, 1)))
addr = XEXP (addr, 0);
else
abort ();
}
if (GET_CODE (addr) == REG)
return addr;
abort ();
}
/* Output assembler code to perform a 32 bit 3 operand add. */
char *
output_addsi3 (operands)
rtx *operands;
{
if (! operands_match_p (operands[0], operands[1]))
{
if (!ADDRESS_REG_P (operands[1]))
{
rtx tmp = operands[1];
operands[1] = operands[2];
operands[2] = tmp;
}
/* These insns can result from reloads to access
stack slots over 64k from the frame pointer. */
if (GET_CODE (operands[2]) == CONST_INT
&& INTVAL (operands[2]) + 0x8000 >= (unsigned) 0x10000)
return "move%.l %2,%0\n\tadd%.l %1,%0";
#ifdef SGS
if (GET_CODE (operands[2]) == REG)
return "lea 0(%1,%2.l),%0";
else
return "lea %c2(%1),%0";
#else /* not SGS */
#ifdef MOTOROLA
if (GET_CODE (operands[2]) == REG)
return "lea (%1,%2.l),%0";
else
return "lea (%c2,%1),%0";
#else /* not MOTOROLA (MIT syntax) */
if (GET_CODE (operands[2]) == REG)
return "lea %1@(0,%2:l),%0";
else
return "lea %1@(%c2),%0";
#endif /* not MOTOROLA */
#endif /* not SGS */
}
if (GET_CODE (operands[2]) == CONST_INT)
{
#ifndef NO_ADDSUB_Q
if (INTVAL (operands[2]) > 0
&& INTVAL (operands[2]) <= 8)
return "addq%.l %2,%0";
if (INTVAL (operands[2]) < 0
&& INTVAL (operands[2]) >= -8)
{
operands[2] = gen_rtx (CONST_INT, VOIDmode,
- INTVAL (operands[2]));
return "subq%.l %2,%0";
}
/* On the CPU32 it is faster to use two addql instructions to
add a small integer (8 < N <= 16) to a register.
Likewise for subql. */
if (TARGET_CPU32 && REG_P (operands[0]))
{
if (INTVAL (operands[2]) > 8
&& INTVAL (operands[2]) <= 16)
{
operands[2] = gen_rtx (CONST_INT, VOIDmode,
INTVAL (operands[2]) - 8);
return "addq%.l %#8,%0\n\taddq%.l %2,%0";
}
if (INTVAL (operands[2]) < -8
&& INTVAL (operands[2]) >= -16)
{
operands[2] = gen_rtx (CONST_INT, VOIDmode,
- INTVAL (operands[2]) - 8);
return "subq%.l %#8,%0\n\tsubq%.l %2,%0";
}
}
#endif
if (ADDRESS_REG_P (operands[0])
&& INTVAL (operands[2]) >= -0x8000
&& INTVAL (operands[2]) < 0x8000)
{
if (TARGET_68040)
return "add%.w %2,%0";
else
#ifdef MOTOROLA
return "lea (%c2,%0),%0";
#else
return "lea %0@(%c2),%0";
#endif
}
}
return "add%.l %2,%0";
}
/* 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. */
/* On the 68000, all the insns to store in an address register fail to
set the cc's. However, in some cases these instructions can make it
possibly invalid to use the saved cc's. In those cases we clear out
some or all of the saved cc's so they won't be used. */
notice_update_cc (exp, insn)
rtx exp;
rtx insn;
{
/* If the cc is being set from the fpa and the expression is not an
explicit floating point test instruction (which has code to deal with
this), reinit the CC. */
if (((cc_status.value1 && FPA_REG_P (cc_status.value1))
|| (cc_status.value2 && FPA_REG_P (cc_status.value2)))
&& !(GET_CODE (exp) == PARALLEL
&& GET_CODE (XVECEXP (exp, 0, 0)) == SET
&& XEXP (XVECEXP (exp, 0, 0), 0) == cc0_rtx))
{
CC_STATUS_INIT;
}
else if (GET_CODE (exp) == SET)
{
if (GET_CODE (SET_SRC (exp)) == CALL)
{
CC_STATUS_INIT;
}
else if (ADDRESS_REG_P (SET_DEST (exp)))
{
if (cc_status.value1
&& reg_overlap_mentioned_p (SET_DEST (exp), cc_status.value1))
cc_status.value1 = 0;
if (cc_status.value2
&& reg_overlap_mentioned_p (SET_DEST (exp), cc_status.value2))
cc_status.value2 = 0;
}
else if (!FP_REG_P (SET_DEST (exp))
&& SET_DEST (exp) != cc0_rtx
&& (FP_REG_P (SET_SRC (exp))
|| GET_CODE (SET_SRC (exp)) == FIX
|| GET_CODE (SET_SRC (exp)) == FLOAT_TRUNCATE
|| GET_CODE (SET_SRC (exp)) == FLOAT_EXTEND))
{
CC_STATUS_INIT;
}
/* A pair of move insns doesn't produce a useful overall cc. */
else if (!FP_REG_P (SET_DEST (exp))
&& !FP_REG_P (SET_SRC (exp))
&& GET_MODE_SIZE (GET_MODE (SET_SRC (exp))) > 4
&& (GET_CODE (SET_SRC (exp)) == REG
|| GET_CODE (SET_SRC (exp)) == MEM
|| GET_CODE (SET_SRC (exp)) == CONST_DOUBLE))
{
CC_STATUS_INIT;
}
else if (GET_CODE (SET_SRC (exp)) == CALL)
{
CC_STATUS_INIT;
}
else if (XEXP (exp, 0) != pc_rtx)
{
cc_status.flags = 0;
cc_status.value1 = XEXP (exp, 0);
cc_status.value2 = XEXP (exp, 1);
}
}
else if (GET_CODE (exp) == PARALLEL
&& GET_CODE (XVECEXP (exp, 0, 0)) == SET)
{
if (ADDRESS_REG_P (XEXP (XVECEXP (exp, 0, 0), 0)))
CC_STATUS_INIT;
else if (XEXP (XVECEXP (exp, 0, 0), 0) != pc_rtx)
{
cc_status.flags = 0;
cc_status.value1 = XEXP (XVECEXP (exp, 0, 0), 0);
cc_status.value2 = XEXP (XVECEXP (exp, 0, 0), 1);
}
}
else
CC_STATUS_INIT;
if (cc_status.value2 != 0
&& ADDRESS_REG_P (cc_status.value2)
&& GET_MODE (cc_status.value2) == QImode)
CC_STATUS_INIT;
if (cc_status.value2 != 0
&& !(cc_status.value1 && FPA_REG_P (cc_status.value1)))
switch (GET_CODE (cc_status.value2))
{
case PLUS: case MINUS: case MULT:
case DIV: case UDIV: case MOD: case UMOD: case NEG:
#if 0 /* These instructions always clear the overflow bit */
case ASHIFT: case ASHIFTRT: case LSHIFTRT:
case ROTATE: case ROTATERT:
#endif
if (GET_MODE (cc_status.value2) != VOIDmode)
cc_status.flags |= CC_NO_OVERFLOW;
break;
case ZERO_EXTEND:
/* (SET r1 (ZERO_EXTEND r2)) on this machine
ends with a move insn moving r2 in r2's mode.
Thus, the cc's are set for r2.
This can set N bit spuriously. */
cc_status.flags |= CC_NOT_NEGATIVE;
}
if (cc_status.value1 && GET_CODE (cc_status.value1) == REG
&& cc_status.value2
&& reg_overlap_mentioned_p (cc_status.value1, cc_status.value2))
cc_status.value2 = 0;
if (((cc_status.value1 && FP_REG_P (cc_status.value1))
|| (cc_status.value2 && FP_REG_P (cc_status.value2)))
&& !((cc_status.value1 && FPA_REG_P (cc_status.value1))
|| (cc_status.value2 && FPA_REG_P (cc_status.value2))))
cc_status.flags = CC_IN_68881;
}
char *
output_move_const_double (operands)
rtx *operands;
{
#ifdef SUPPORT_SUN_FPA
if (TARGET_FPA && FPA_REG_P (operands[0]))
{
int code = standard_sun_fpa_constant_p (operands[1]);
if (code != 0)
{
static char buf[40];
sprintf (buf, "fpmove%%.d %%%%%d,%%0", code & 0x1ff);
return buf;
}
return "fpmove%.d %1,%0";
}
else
#endif
{
int code = standard_68881_constant_p (operands[1]);
if (code != 0)
{
static char buf[40];
sprintf (buf, "fmovecr %%#0x%x,%%0", code & 0xff);
return buf;
}
return "fmove%.d %1,%0";
}
}
char *
output_move_const_single (operands)
rtx *operands;
{
#ifdef SUPPORT_SUN_FPA
if (TARGET_FPA)
{
int code = standard_sun_fpa_constant_p (operands[1]);
if (code != 0)
{
static char buf[40];
sprintf (buf, "fpmove%%.s %%%%%d,%%0", code & 0x1ff);
return buf;
}
return "fpmove%.s %1,%0";
}
else
#endif /* defined SUPPORT_SUN_FPA */
{
int code = standard_68881_constant_p (operands[1]);
if (code != 0)
{
static char buf[40];
sprintf (buf, "fmovecr %%#0x%x,%%0", code & 0xff);
return buf;
}
return "fmove%.s %f1,%0";
}
}
/* Return nonzero if X, a CONST_DOUBLE, has a value that we can get
from the "fmovecr" instruction.
The value, anded with 0xff, gives the code to use in fmovecr
to get the desired constant. */
/* This code has been fixed for cross-compilation. */
static int inited_68881_table = 0;
char *strings_68881[7] = {
"0.0",
"1.0",
"10.0",
"100.0",
"10000.0",
"1e8",
"1e16"
};
int codes_68881[7] = {
0x0f,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37
};
REAL_VALUE_TYPE values_68881[7];
/* Set up values_68881 array by converting the decimal values
strings_68881 to binary. */
void
init_68881_table ()
{
int i;
REAL_VALUE_TYPE r;
enum machine_mode mode;
mode = SFmode;
for (i = 0; i < 7; i++)
{
if (i == 6)
mode = DFmode;
r = REAL_VALUE_ATOF (strings_68881[i], mode);
values_68881[i] = r;
}
inited_68881_table = 1;
}
int
standard_68881_constant_p (x)
rtx x;
{
REAL_VALUE_TYPE r;
int i;
enum machine_mode mode;
#ifdef NO_ASM_FMOVECR
return 0;
#endif
/* fmovecr must be emulated on the 68040, so it shouldn't be used at all. */
if (TARGET_68040)
return 0;
#ifndef REAL_ARITHMETIC
#if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
if (! flag_pretend_float)
return 0;
#endif
#endif
if (! inited_68881_table)
init_68881_table ();
REAL_VALUE_FROM_CONST_DOUBLE (r, x);
for (i = 0; i < 6; i++)
{
if (REAL_VALUES_EQUAL (r, values_68881[i]))
return (codes_68881[i]);
}
if (GET_MODE (x) == SFmode)
return 0;
if (REAL_VALUES_EQUAL (r, values_68881[6]))
return (codes_68881[6]);
/* larger powers of ten in the constants ram are not used
because they are not equal to a `double' C constant. */
return 0;
}
/* If X is a floating-point constant, return the logarithm of X base 2,
or 0 if X is not a power of 2. */
int
floating_exact_log2 (x)
rtx x;
{
REAL_VALUE_TYPE r, r1;
int i;
#ifndef REAL_ARITHMETIC
#if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
if (! flag_pretend_float)
return 0;
#endif
#endif
REAL_VALUE_FROM_CONST_DOUBLE (r, x);
if (REAL_VALUES_LESS (r, dconst0))
return 0;
r1 = dconst1;
i = 0;
while (REAL_VALUES_LESS (r1, r))
{
r1 = REAL_VALUE_LDEXP (dconst1, i);
if (REAL_VALUES_EQUAL (r1, r))
return i;
i = i + 1;
}
return 0;
}
#ifdef SUPPORT_SUN_FPA
/* Return nonzero if X, a CONST_DOUBLE, has a value that we can get
from the Sun FPA's constant RAM.
The value returned, anded with 0x1ff, gives the code to use in fpmove
to get the desired constant. */
static int inited_FPA_table = 0;
char *strings_FPA[38] = {
/* small rationals */
"0.0",
"1.0",
"0.5",
"-1.0",
"2.0",
"3.0",
"4.0",
"8.0",
"0.25",
"0.125",
"10.0",
"-0.5",
/* Decimal equivalents of double precision values */
"2.718281828459045091", /* D_E */
"6.283185307179586477", /* 2 pi */
"3.141592653589793116", /* D_PI */
"1.570796326794896619", /* pi/2 */
"1.414213562373095145", /* D_SQRT2 */
"0.7071067811865475244", /* 1/sqrt(2) */
"-1.570796326794896619", /* -pi/2 */
"1.442695040888963387", /* D_LOG2ofE */
"3.321928024887362182", /* D_LOG2of10 */
"0.6931471805599452862", /* D_LOGEof2 */
"2.302585092994045901", /* D_LOGEof10 */
"0.3010299956639811980", /* D_LOG10of2 */
"0.4342944819032518167", /* D_LOG10ofE */
/* Decimal equivalents of single precision values */
"2.718281745910644531", /* S_E */
"6.283185307179586477", /* 2 pi */
"3.141592741012573242", /* S_PI */
"1.570796326794896619", /* pi/2 */
"1.414213538169860840", /* S_SQRT2 */
"0.7071067811865475244", /* 1/sqrt(2) */
"-1.570796326794896619", /* -pi/2 */
"1.442695021629333496", /* S_LOG2ofE */
"3.321928024291992188", /* S_LOG2of10 */
"0.6931471824645996094", /* S_LOGEof2 */
"2.302585124969482442", /* S_LOGEof10 */
"0.3010300099849700928", /* S_LOG10of2 */
"0.4342944920063018799", /* S_LOG10ofE */
};
int codes_FPA[38] = {
/* small rationals */
0x200,
0xe,
0xf,
0x10,
0x11,
0xb1,
0x12,
0x13,
0x15,
0x16,
0x17,
0x2e,
/* double precision */
0x8,
0x9,
0xa,
0xb,
0xc,
0xd,
0x27,
0x28,
0x29,
0x2a,
0x2b,
0x2c,
0x2d,
/* single precision */
0x8,
0x9,
0xa,
0xb,
0xc,
0xd,
0x27,
0x28,
0x29,
0x2a,
0x2b,
0x2c,
0x2d
};
REAL_VALUE_TYPE values_FPA[38];
/* This code has been fixed for cross-compilation. */
void
init_FPA_table ()
{
enum machine_mode mode;
int i;
REAL_VALUE_TYPE r;
mode = DFmode;
for (i = 0; i < 38; i++)
{
if (i == 25)
mode = SFmode;
r = REAL_VALUE_ATOF (strings_FPA[i], mode);
values_FPA[i] = r;
}
inited_FPA_table = 1;
}
int
standard_sun_fpa_constant_p (x)
rtx x;
{
REAL_VALUE_TYPE r;
int i;
#ifndef REAL_ARITHMETIC
#if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
if (! flag_pretend_float)
return 0;
#endif
#endif
if (! inited_FPA_table)
init_FPA_table ();
REAL_VALUE_FROM_CONST_DOUBLE (r, x);
for (i=0; i<12; i++)
{
if (REAL_VALUES_EQUAL (r, values_FPA[i]))
return (codes_FPA[i]);
}
if (GET_MODE (x) == SFmode)
{
for (i=25; i<38; i++)
{
if (REAL_VALUES_EQUAL (r, values_FPA[i]))
return (codes_FPA[i]);
}
}
else
{
for (i=12; i<25; i++)
{
if (REAL_VALUES_EQUAL (r, values_FPA[i]))
return (codes_FPA[i]);
}
}
return 0x0;
}
#endif /* define SUPPORT_SUN_FPA */
/* A C compound statement to output to stdio stream STREAM the
assembler syntax for an instruction operand X. X is an RTL
expression.
CODE is a value that can be used to specify one of several ways
of printing the operand. It is used when identical operands
must be printed differently depending on the context. CODE
comes from the `%' specification that was used to request
printing of the operand. If the specification was just `%DIGIT'
then CODE is 0; if the specification was `%LTR DIGIT' then CODE
is the ASCII code for LTR.
If X is a register, this macro should print the register's name.
The names can be found in an array `reg_names' whose type is
`char *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
When the machine description has a specification `%PUNCT' (a `%'
followed by a punctuation character), this macro is called with
a null pointer for X and the punctuation character for CODE.
The m68k specific codes are:
'.' for dot needed in Motorola-style opcode names.
'-' for an operand pushing on the stack:
sp@-, -(sp) or -(%sp) depending on the style of syntax.
'+' for an operand pushing on the stack:
sp@+, (sp)+ or (%sp)+ depending on the style of syntax.
'@' for a reference to the top word on the stack:
sp@, (sp) or (%sp) depending on the style of syntax.
'#' for an immediate operand prefix (# in MIT and Motorola syntax
but & in SGS syntax, $ in CRDS/UNOS syntax).
'!' for the cc register (used in an `and to cc' insn).
'$' for the letter `s' in an op code, but only on the 68040.
'&' for the letter `d' in an op code, but only on the 68040.
'/' for register prefix needed by longlong.h.
'b' for byte insn (no effect, on the Sun; this is for the ISI).
'd' to force memory addressing to be absolute, not relative.
'f' for float insn (print a CONST_DOUBLE as a float rather than in hex)
'w' for FPA insn (print a CONST_DOUBLE as a SunFPA constant rather
than directly). Second part of 'y' below.
'x' for float insn (print a CONST_DOUBLE as a float rather than in hex),
or print pair of registers as rx:ry.
'y' for a FPA insn (print pair of registers as rx:ry). This also outputs
CONST_DOUBLE's as SunFPA constant RAM registers if
possible, so it should not be used except for the SunFPA.
*/
void
print_operand (file, op, letter)
FILE *file; /* file to write to */
rtx op; /* operand to print */
int letter; /* %<letter> or 0 */
{
int i;
if (letter == '.')
{
#if defined (MOTOROLA) && !defined (CRDS)
asm_fprintf (file, ".");
#endif
}
else if (letter == '#')
{
asm_fprintf (file, "%0I");
}
else if (letter == '-')
{
#ifdef MOTOROLA
asm_fprintf (file, "-(%Rsp)");
#else
asm_fprintf (file, "%Rsp@-");
#endif
}
else if (letter == '+')
{
#ifdef MOTOROLA
asm_fprintf (file, "(%Rsp)+");
#else
asm_fprintf (file, "%Rsp@+");
#endif
}
else if (letter == '@')
{
#ifdef MOTOROLA
asm_fprintf (file, "(%Rsp)");
#else
asm_fprintf (file, "%Rsp@");
#endif
}
else if (letter == '!')
{
asm_fprintf (file, "%Rfpcr");
}
else if (letter == '$')
{
if (TARGET_68040_ONLY)
{
fprintf (file, "s");
}
}
else if (letter == '&')
{
if (TARGET_68040_ONLY)
{
fprintf (file, "d");
}
}
else if (letter == '/')
{
asm_fprintf (file, "%R");
}
else if (GET_CODE (op) == REG)
{
#ifdef SUPPORT_SUN_FPA
if (REGNO (op) < 16
&& (letter == 'y' || letter == 'x')
&& GET_MODE (op) == DFmode)
{
fprintf (file, "%s:%s", reg_names[REGNO (op)],
reg_names[REGNO (op)+1]);
}
else
#endif
{
if (letter == 'R')
/* Print out the second register name of a register pair.
I.e., R (6) => 7. */
fputs (reg_names[REGNO (op) + 1], file);
else
fputs (reg_names[REGNO (op)], file);
}
}
else if (GET_CODE (op) == MEM)
{
output_address (XEXP (op, 0));
if (letter == 'd' && ! TARGET_68020
&& CONSTANT_ADDRESS_P (XEXP (op, 0))
&& !(GET_CODE (XEXP (op, 0)) == CONST_INT
&& INTVAL (XEXP (op, 0)) < 0x8000
&& INTVAL (XEXP (op, 0)) >= -0x8000))
{
#ifdef MOTOROLA
fprintf (file, ".l");
#else
fprintf (file, ":l");
#endif
}
}
#ifdef SUPPORT_SUN_FPA
else if ((letter == 'y' || letter == 'w')
&& GET_CODE (op) == CONST_DOUBLE
&& (i = standard_sun_fpa_constant_p (op)))
{
fprintf (file, "%%%d", i & 0x1ff);
}
#endif
else if (GET_CODE (op) == CONST_DOUBLE && GET_MODE (op) == SFmode)
{
REAL_VALUE_TYPE r;
REAL_VALUE_FROM_CONST_DOUBLE (r, op);
ASM_OUTPUT_FLOAT_OPERAND (letter, file, r);
}
else if (GET_CODE (op) == CONST_DOUBLE && GET_MODE (op) == XFmode)
{
REAL_VALUE_TYPE r;
REAL_VALUE_FROM_CONST_DOUBLE (r, op);
ASM_OUTPUT_LONG_DOUBLE_OPERAND (file, r);
}
else if (GET_CODE (op) == CONST_DOUBLE && GET_MODE (op) == DFmode)
{
REAL_VALUE_TYPE r;
REAL_VALUE_FROM_CONST_DOUBLE (r, op);
ASM_OUTPUT_DOUBLE_OPERAND (file, r);
}
else
{
asm_fprintf (file, "%0I"); output_addr_const (file, op);
}
}
/* A C compound statement to output to stdio stream STREAM the
assembler syntax for an instruction operand that is a memory
reference whose address is ADDR. ADDR is an RTL expression.
Note that this contains a kludge that knows that the only reason
we have an address (plus (label_ref...) (reg...)) when not generating
PIC code is in the insn before a tablejump, and we know that m68k.md
generates a label LInnn: on such an insn.
It is possible for PIC to generate a (plus (label_ref...) (reg...))
and we handle that just like we would a (plus (symbol_ref...) (reg...)).
Some SGS assemblers have a bug such that "Lnnn-LInnn-2.b(pc,d0.l*2)"
fails to assemble. Luckily "Lnnn(pc,d0.l*2)" produces the results
we want. This difference can be accommodated by using an assembler
define such "LDnnn" to be either "Lnnn-LInnn-2.b", "Lnnn", or any other
string, as necessary. This is accomplished via the ASM_OUTPUT_CASE_END
macro. See m68k/sgs.h for an example; for versions without the bug.
Some assemblers refuse all the above solutions. The workaround is to
emit "K(pc,d0.l*2)" with K being a small constant known to give the
right behaviour.
They also do not like things like "pea 1.w", so we simple leave off
the .w on small constants.
This routine is responsible for distinguishing between -fpic and -fPIC
style relocations in an address. When generating -fpic code the
offset is output in word mode (eg movel a5@(_foo:w), a0). When generating
-fPIC code the offset is output in long mode (eg movel a5@(_foo:l), a0) */
#ifndef ASM_OUTPUT_CASE_FETCH
#ifdef MOTOROLA
#ifdef SGS
#define ASM_OUTPUT_CASE_FETCH(file, labelno, regname)\
asm_fprintf (file, "%LLD%d(%Rpc,%s.", labelno, regname)
#else
#define ASM_OUTPUT_CASE_FETCH(file, labelno, regname)\
asm_fprintf (file, "%LL%d-%LLI%d.b(%Rpc,%s.", labelno, labelno, regname)
#endif
#else
#define ASM_OUTPUT_CASE_FETCH(file, labelno, regname)\
asm_fprintf (file, "%Rpc@(%LL%d-%LLI%d-2:b,%s:", labelno, labelno, regname)
#endif
#endif /* ASM_OUTPUT_CASE_FETCH */
void
print_operand_address (file, addr)
FILE *file;
rtx addr;
{
register rtx reg1, reg2, breg, ireg;
rtx offset;
switch (GET_CODE (addr))
{
case REG:
#ifdef MOTOROLA
fprintf (file, "(%s)", reg_names[REGNO (addr)]);
#else
fprintf (file, "%s@", reg_names[REGNO (addr)]);
#endif
break;
case PRE_DEC:
#ifdef MOTOROLA
fprintf (file, "-(%s)", reg_names[REGNO (XEXP (addr, 0))]);
#else
fprintf (file, "%s@-", reg_names[REGNO (XEXP (addr, 0))]);
#endif
break;
case POST_INC:
#ifdef MOTOROLA
fprintf (file, "(%s)+", reg_names[REGNO (XEXP (addr, 0))]);
#else
fprintf (file, "%s@+", reg_names[REGNO (XEXP (addr, 0))]);
#endif
break;
case PLUS:
reg1 = reg2 = ireg = breg = offset = 0;
if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))
{
offset = XEXP (addr, 0);
addr = XEXP (addr, 1);
}
else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))
{
offset = XEXP (addr, 1);
addr = XEXP (addr, 0);
}
if (GET_CODE (addr) != PLUS)
{
;
}
else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)
{
reg1 = XEXP (addr, 0);
addr = XEXP (addr, 1);
}
else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)
{
reg1 = XEXP (addr, 1);
addr = XEXP (addr, 0);
}
else if (GET_CODE (XEXP (addr, 0)) == MULT)
{
reg1 = XEXP (addr, 0);
addr = XEXP (addr, 1);
}
else if (GET_CODE (XEXP (addr, 1)) == MULT)
{
reg1 = XEXP (addr, 1);
addr = XEXP (addr, 0);
}
else if (GET_CODE (XEXP (addr, 0)) == REG)
{
reg1 = XEXP (addr, 0);
addr = XEXP (addr, 1);
}
else if (GET_CODE (XEXP (addr, 1)) == REG)
{
reg1 = XEXP (addr, 1);
addr = XEXP (addr, 0);
}
if (GET_CODE (addr) == REG || GET_CODE (addr) == MULT
|| GET_CODE (addr) == SIGN_EXTEND)
{
if (reg1 == 0)
{
reg1 = addr;
}
else
{
reg2 = addr;
}
addr = 0;
}
#if 0 /* for OLD_INDEXING */
else if (GET_CODE (addr) == PLUS)
{
if (GET_CODE (XEXP (addr, 0)) == REG)
{
reg2 = XEXP (addr, 0);
addr = XEXP (addr, 1);
}
else if (GET_CODE (XEXP (addr, 1)) == REG)
{
reg2 = XEXP (addr, 1);
addr = XEXP (addr, 0);
}
}
#endif
if (offset != 0)
{
if (addr != 0)
{
abort ();
}
addr = offset;
}
if ((reg1 && (GET_CODE (reg1) == SIGN_EXTEND
|| GET_CODE (reg1) == MULT))
|| (reg2 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg2))))
{
breg = reg2;
ireg = reg1;
}
else if (reg1 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg1)))
{
breg = reg1;
ireg = reg2;
}
if (ireg != 0 && breg == 0 && GET_CODE (addr) == LABEL_REF
&& ! (flag_pic && ireg == pic_offset_table_rtx))
{
int scale = 1;
if (GET_CODE (ireg) == MULT)
{
scale = INTVAL (XEXP (ireg, 1));
ireg = XEXP (ireg, 0);
}
if (GET_CODE (ireg) == SIGN_EXTEND)
{
ASM_OUTPUT_CASE_FETCH (file,
CODE_LABEL_NUMBER (XEXP (addr, 0)),
reg_names[REGNO (XEXP (ireg, 0))]);
fprintf (file, "w");
}
else
{
ASM_OUTPUT_CASE_FETCH (file,
CODE_LABEL_NUMBER (XEXP (addr, 0)),
reg_names[REGNO (ireg)]);
fprintf (file, "l");
}
if (scale != 1)
{
#ifdef MOTOROLA
fprintf (file, "*%d", scale);
#else
fprintf (file, ":%d", scale);
#endif
}
putc (')', file);
break;
}
if (breg != 0 && ireg == 0 && GET_CODE (addr) == LABEL_REF
&& ! (flag_pic && breg == pic_offset_table_rtx))
{
ASM_OUTPUT_CASE_FETCH (file,
CODE_LABEL_NUMBER (XEXP (addr, 0)),
reg_names[REGNO (breg)]);
fprintf (file, "l)");
break;
}
if (ireg != 0 || breg != 0)
{
int scale = 1;
if (breg == 0)
{
abort ();
}
if (! flag_pic && addr && GET_CODE (addr) == LABEL_REF)
{
abort ();
}
#ifdef MOTOROLA
if (addr != 0)
{
output_addr_const (file, addr);
if (flag_pic && (breg == pic_offset_table_rtx))
fprintf (file, "@GOT");
}
fprintf (file, "(%s", reg_names[REGNO (breg)]);
if (ireg != 0)
{
putc (',', file);
}
#else
fprintf (file, "%s@(", reg_names[REGNO (breg)]);
if (addr != 0)
{
output_addr_const (file, addr);
if ((flag_pic == 1) && (breg == pic_offset_table_rtx))
fprintf (file, ":w");
if ((flag_pic == 2) && (breg == pic_offset_table_rtx))
fprintf (file, ":l");
}
if (addr != 0 && ireg != 0)
{
putc (',', file);
}
#endif
if (ireg != 0 && GET_CODE (ireg) == MULT)
{
scale = INTVAL (XEXP (ireg, 1));
ireg = XEXP (ireg, 0);
}
if (ireg != 0 && GET_CODE (ireg) == SIGN_EXTEND)
{
#ifdef MOTOROLA
fprintf (file, "%s.w", reg_names[REGNO (XEXP (ireg, 0))]);
#else
fprintf (file, "%s:w", reg_names[REGNO (XEXP (ireg, 0))]);
#endif
}
else if (ireg != 0)
{
#ifdef MOTOROLA
fprintf (file, "%s.l", reg_names[REGNO (ireg)]);
#else
fprintf (file, "%s:l", reg_names[REGNO (ireg)]);
#endif
}
if (scale != 1)
{
#ifdef MOTOROLA
fprintf (file, "*%d", scale);
#else
fprintf (file, ":%d", scale);
#endif
}
putc (')', file);
break;
}
else if (reg1 != 0 && GET_CODE (addr) == LABEL_REF
&& ! (flag_pic && reg1 == pic_offset_table_rtx))
{
ASM_OUTPUT_CASE_FETCH (file,
CODE_LABEL_NUMBER (XEXP (addr, 0)),
reg_names[REGNO (reg1)]);
fprintf (file, "l)");
break;
}
/* FALL-THROUGH (is this really what we want? */
default:
if (GET_CODE (addr) == CONST_INT
&& INTVAL (addr) < 0x8000
&& INTVAL (addr) >= -0x8000)
{
#ifdef MOTOROLA
#ifdef SGS
/* Many SGS assemblers croak on size specifiers for constants. */
fprintf (file, "%d", INTVAL (addr));
#else
fprintf (file, "%d.w", INTVAL (addr));
#endif
#else
fprintf (file, "%d:w", INTVAL (addr));
#endif
}
else
{
output_addr_const (file, addr);
}
break;
}
}
/* Check for cases where a clr insns can be omitted from code using
strict_low_part sets. For example, the second clrl here is not needed:
clrl d0; movw a0@+,d0; use d0; clrl d0; movw a0@+; use d0; ...
MODE is the mode of this STRICT_LOW_PART set. FIRST_INSN is the clear
insn we are checking for redundancy. TARGET is the register set by the
clear insn. */
int
strict_low_part_peephole_ok (mode, first_insn, target)
enum machine_mode mode;
rtx first_insn;
rtx target;
{
rtx p;
p = prev_nonnote_insn (first_insn);
while (p)
{
/* If it isn't an insn, then give up. */
if (GET_CODE (p) != INSN)
return 0;
if (reg_set_p (target, p))
{
rtx set = single_set (p);
rtx dest;
/* If it isn't an easy to recognize insn, then give up. */
if (! set)
return 0;
dest = SET_DEST (set);
/* If this sets the entire target register to zero, then our
first_insn is redundant. */
if (rtx_equal_p (dest, target)
&& SET_SRC (set) == const0_rtx)
return 1;
else if (GET_CODE (dest) == STRICT_LOW_PART
&& GET_CODE (XEXP (dest, 0)) == REG
&& REGNO (XEXP (dest, 0)) == REGNO (target)
&& (GET_MODE_SIZE (GET_MODE (XEXP (dest, 0)))
<= GET_MODE_SIZE (mode)))
/* This is a strict low part set which modifies less than
we are using, so it is safe. */
;
else
return 0;
}
p = prev_nonnote_insn (p);
}
return 0;
}
/* Accept integer operands in the range 0..0xffffffff. We have to check the
range carefully since this predicate is used in DImode contexts. Also, we
need some extra crud to make it work when hosted on 64-bit machines. */
int
const_uint32_operand (op, mode)
rtx op;
enum machine_mode mode;
{
#if HOST_BITS_PER_WIDE_INT > 32
/* All allowed constants will fit a CONST_INT. */
return (GET_CODE (op) == CONST_INT
&& (INTVAL (op) >= 0 && INTVAL (op) <= 0xffffffffL));
#else
return ((GET_CODE (op) == CONST_INT && INTVAL (op) >= 0)
|| (GET_CODE (op) == CONST_DOUBLE && CONST_DOUBLE_HIGH (op) == 0));
#endif
}
/* Accept integer operands in the range -0x80000000..0x7fffffff. We have
to check the range carefully since this predicate is used in DImode