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rs6000.h (FUNCTION_ARG_PADDING): Define.

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* rs6000.h (FUNCTION_ARG_PADDING): Define.
        * rs6000.c (function_arg_padding): New function.

From-SVN: r17029
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David Edelsohn 1997-12-09 16:35:56 +00:00 committed by Jeff Law
parent b2c59d0b27
commit c229cba913
3 changed files with 43 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Tue Dec 9 09:38:58 1997 David Edelsohn <edelsohn@mhpcc.edu>
* rs6000.h (FUNCTION_ARG_PADDING): Define.
* rs6000.c (function_arg_padding): New function.
Tue Dec 9 10:34:21 1997 Manfred Hollstein <manfred@s-direktnet.de>
* m68k.c: Include tree.h only once.

29
gcc/config/rs6000/rs6000.c
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@ -1167,6 +1167,35 @@ init_cumulative_args (cum, fntype, libname, incoming)
}
}
/* If defined, a C expression which determines whether, and in which
direction, to pad out an argument with extra space. The value
should be of type `enum direction': either `upward' to pad above
the argument, `downward' to pad below, or `none' to inhibit
padding.
For the AIX ABI structs are always stored left shifted in their
argument slot. */
enum direction
function_arg_padding (mode, type)
enum machine_mode mode;
tree type;
{
if (type && TREE_CODE (type) == RECORD_TYPE)
{
return upward;
}
/* This is the default definition. */
return (! BYTES_BIG_ENDIAN
? upward
: ((mode == BLKmode
? (type && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST
&& int_size_in_bytes (type) < (PARM_BOUNDARY / BITS_PER_UNIT))
: GET_MODE_BITSIZE (mode) < PARM_BOUNDARY)
? downward : upward));
}
/* If defined, a C expression that gives the alignment boundary, in bits,
of an argument with the specified mode and type. If it is not defined,
PARM_BOUNDARY is used for all arguments.

9
gcc/config/rs6000/rs6000.h
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@ -1461,6 +1461,15 @@ typedef struct rs6000_args
#define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
function_arg_pass_by_reference(&CUM, MODE, TYPE, NAMED)
/* If defined, a C expression which determines whether, and in which
direction, to pad out an argument with extra space. The value
should be of type `enum direction': either `upward' to pad above
the argument, `downward' to pad below, or `none' to inhibit
padding. */
#define FUNCTION_ARG_PADDING(MODE, TYPE) \
function_arg_padding (MODE, TYPE)
/* If defined, a C expression that gives the alignment boundary, in bits,
of an argument with the specified mode and type. If it is not defined,
PARM_BOUNDARY is used for all arguments. */