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(TARGET_OPTIONS): Added alignment options.

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(MAX_CODE_ALIGN, ASM_OUTPUT_LOOP_ALIGN, ASM_OUTPUT_ALIGN_CODE):
New macros.
(FUNCTION_BOUNDARY): Use value derrived from  m68k_align_funcs
instead of constant.

From-SVN: r13126
This commit is contained in:
Richard Kenner 1996-11-12 13:09:55 -05:00
parent ef1dbfb03b
commit 9e62c7f28d
1 changed files with 47 additions and 4 deletions
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51
gcc/config/m68k/m68k.h
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@ -158,17 +158,42 @@ extern int target_flags;
{ "", TARGET_DEFAULT}}
/* TARGET_DEFAULT is defined in sun*.h and isi.h, etc. */
/* This is meant to be redefined in the host dependent files */
#define SUBTARGET_SWITCHES
/* This macro is similar to `TARGET_SWITCHES' but defines names of
command options that have values. Its definition is an
initializer with a subgrouping for each command option.
Each subgrouping contains a string constant, that defines the
fixed part of the option name, and the address of a variable. The
variable, type `char *', is set to the variable part of the given
option if the fixed part matches. The actual option name is made
by appending `-m' to the specified name. */
#define TARGET_OPTIONS \
{ { "align-loops=", &m68k_align_loops_string }, \
{ "align-jumps=", &m68k_align_jumps_string }, \
{ "align-functions=", &m68k_align_funcs_string }, \
SUBTARGET_OPTIONS \
}
/* 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. */
#define OVERRIDE_OPTIONS \
{ \
override_options(); \
if (! TARGET_68020 && flag_pic == 2) \
error("-fPIC is not currently supported on the 68000 or 68010\n"); \
SUBTARGET_OVERRIDE_OPTIONS; \
}
/* This is meant to be redefined in the host dependent files */
/* These are meant to be redefined in the host dependent files */
#define SUBTARGET_SWITCHES
#define SUBTARGET_OPTIONS
#define SUBTARGET_OVERRIDE_OPTIONS
/* target machine storage layout */
@ -223,7 +248,7 @@ extern int target_flags;
#define STACK_BOUNDARY 16
/* Allocation boundary (in *bits*) for the code of a function. */
#define FUNCTION_BOUNDARY 16
#define FUNCTION_BOUNDARY (1 << (m68k_align_funcs + 3))
/* Alignment of field after `int : 0' in a structure. */
#define EMPTY_FIELD_BOUNDARY 16
@ -235,6 +260,15 @@ extern int target_flags;
when given unaligned data. */
#define STRICT_ALIGNMENT 1
/* Maximum power of 2 that code can be aligned to. */
#define MAX_CODE_ALIGN 2 /* 4 byte alignment */
/* Align loop starts for optimal branching. */
#define ASM_OUTPUT_LOOP_ALIGN(FILE) ASM_OUTPUT_ALIGN ((FILE), m68k_align_loops)
/* This is how to align an instruction for optimal branching. */
#define ASM_OUTPUT_ALIGN_CODE(FILE) ASM_OUTPUT_ALIGN ((FILE), m68k_align_jumps)
#define SELECT_RTX_SECTION(MODE, X) \
{ \
if (!flag_pic) \
@ -2042,6 +2076,15 @@ extern char *output_move_const_single ();
extern char *output_move_const_double ();
extern char *output_btst ();
extern char *output_scc_di ();
/* Variables in m68k.c */
extern char *m68k_align_loops_string;
extern char *m68k_align_jumps_string;
extern char *m68k_align_funcs_string;
extern int m68k_align_loops;
extern int m68k_align_jumps;
extern int m68k_align_funcs;
/*
Local variables: