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rs6000.md (floatsidf2_loadaddr): rs6000_fpmem_offset will be negative in a stackless frame. 

* rs6000.md (floatsidf2_loadaddr): rs6000_fpmem_offset will be
        negative in a stackless frame.
        * rs6000.c (rs6000_stack_info): Don't include fixed-size link area
        in stackless frame size.  Support 64-bit stackless frame size.
        Combine fpmem offset calculations and don't add total_size to
        offset if not pushing a stack frame.

From-SVN: r19283
This commit is contained in:
David Edelsohn 1998-04-18 16:16:02 +00:00 committed by David Edelsohn
parent a1ecb5ca07
commit db72d7a1d6
3 changed files with 27 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
Sat Apr 18 19:06:59 1998 David Edelsohn <edelsohn@mhpcc.edu>
* rs6000.md (floatsidf2_loadaddr): rs6000_fpmem_offset will be
negative in a stackless frame.
* rs6000.c (rs6000_stack_info): Don't include fixed-size link area
in stackless frame size. Support 64-bit stackless frame size.
Combine fpmem offset calculations and don't add total_size to
offset if not pushing a stack frame.
Sat Apr 18 15:41:16 1998 Jim Wilson <wilson@cygnus.com>
* regmove.c (fixup_match_1): In three places, in flag_exceptions

32
gcc/config/rs6000/rs6000.c
View File

@ -3228,10 +3228,13 @@ rs6000_stack_info ()
info_ptr->total_size = RS6000_ALIGN (total_raw_size, ABI_STACK_BOUNDARY / BITS_PER_UNIT);
/* Determine if we need to allocate any stack frame.
For AIX We need to push the stack if a frame pointer is needed (because
the stack might be dynamically adjusted), if we are debugging, if the
total stack size is more than 220 bytes, or if we make calls.
/* Determine if we need to allocate any stack frame:
For AIX we need to push the stack if a frame pointer is needed (because
the stack might be dynamically adjusted), if we are debugging, if we
make calls, or if the sum of fp_save, gp_save, fpmem, and local variables
are more than the space needed to save all non-volatile registers:
32-bit: 18*8 + 19*4 = 220 or 64-bit: 18*8 + 19*8 = 296
For V.4 we don't have the stack cushion that AIX uses, but assume that
the debugger can handle stackless frames. */
@ -3247,7 +3250,8 @@ rs6000_stack_info ()
else
info_ptr->push_p = (frame_pointer_needed
|| write_symbols != NO_DEBUG
|| info_ptr->total_size > 220);
|| ((info_ptr->total_size - info_ptr->fixed_size)
> (TARGET_32BIT ? 220 : 296)));
/* Calculate the offsets */
switch (abi)
@ -3289,7 +3293,15 @@ rs6000_stack_info ()
}
if (info_ptr->fpmem_p)
info_ptr->fpmem_offset = STARTING_FRAME_OFFSET - info_ptr->total_size + info_ptr->vars_size;
{
info_ptr->fpmem_offset = info_ptr->main_save_offset - info_ptr->fpmem_size;
rs6000_fpmem_size = info_ptr->fpmem_size;
rs6000_fpmem_offset = info_ptr->push_p
? info_ptr->total_size + info_ptr->fpmem_offset
: info_ptr->fpmem_offset;
}
else
info_ptr->fpmem_offset = 0;
/* Zero offsets if we're not saving those registers */
if (!info_ptr->fp_size)
@ -3310,14 +3322,6 @@ rs6000_stack_info ()
if (!info_ptr->main_save_p)
info_ptr->main_save_offset = 0;
if (!info_ptr->fpmem_p)
info_ptr->fpmem_offset = 0;
else
{
rs6000_fpmem_size = info_ptr->fpmem_size;
rs6000_fpmem_offset = info_ptr->total_size + info_ptr->fpmem_offset;
}
return info_ptr;
}

2
gcc/config/rs6000/rs6000.md
View File

@ -3701,8 +3701,6 @@
xop[2] = GEN_INT ((rs6000_fpmem_offset >> 16) + ((rs6000_fpmem_offset & 0x8000) >> 15));
output_asm_insn (\"{cau|addis} %0,%1,%2\", xop);
}
else if (rs6000_fpmem_offset < 0)
abort ();
return \"\";
}"