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defaults.h (REG_WORDS_BIG_ENDIAN): Provide a default. 

* defaults.h (REG_WORDS_BIG_ENDIAN): Provide a default.
	* doc/tm.texi.in (WORDS_BIG_ENDIAN): Mention REG_WORDS_BIG_ENDIAN.
	(REG_WORDS_BIG_ENDIAN): Document.
	* doc/tm.texi: Regenerate.
	* reload.c (operands_match_p): Take it into account.
	(reload_adjust_reg_for_mode): Likewise.
	* rtlanal.c (subreg_get_info): Likewise.

From-SVN: r176048
This commit is contained in:
Bernd Schmidt 2011-07-08 16:21:58 +00:00 committed by Bernd Schmidt
parent 9ae6010158
commit c0a6a1eff6
6 changed files with 44 additions and 9 deletions
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8
gcc/ChangeLog
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@ -4,6 +4,14 @@
in terms of another.
(write_attr_value): Write a cast if necessary.
* defaults.h (REG_WORDS_BIG_ENDIAN): Provide a default.
* doc/tm.texi.in (WORDS_BIG_ENDIAN): Mention REG_WORDS_BIG_ENDIAN.
(REG_WORDS_BIG_ENDIAN): Document.
* doc/tm.texi: Regenerate.
* reload.c (operands_match_p): Take it into account.
(reload_adjust_reg_for_mode): Likewise.
* rtlanal.c (subreg_get_info): Likewise.
2011-07-08 Richard Guenther <rguenther@suse.de>
* fold-const.c (fold_binary_loc): Remove index +p PTR -> PTR +p index

4
gcc/defaults.h
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@ -882,6 +882,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
#endif
#ifndef REG_WORDS_BIG_ENDIAN
#define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
#endif
#ifdef TARGET_FLT_EVAL_METHOD
#define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
#else

11
gcc/doc/tm.texi
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@ -870,11 +870,18 @@ word has the lowest number. This macro need not be a constant.
@defmac WORDS_BIG_ENDIAN
Define this macro to have the value 1 if, in a multiword object, the
most significant word has the lowest number. This applies to both
memory locations and registers; GCC fundamentally assumes that the
order of words in memory is the same as the order in registers. This
memory locations and registers; see @code{REG_WORDS_BIG_ENDIAN} if the
order of words in memory is not the same as the order in registers. This
macro need not be a constant.
@end defmac
@defmac REG_WORDS_BIG_ENDIAN
On some machines, the order of words in a multiword object differs between
registers in memory. In such a situation, define this macro to describe
the order of words in a register. The macro @code{WORDS_BIG_ENDIAN} controls
the order of words in memory.
@end defmac
@defmac FLOAT_WORDS_BIG_ENDIAN
Define this macro to have the value 1 if @code{DFmode}, @code{XFmode} or
@code{TFmode} floating point numbers are stored in memory with the word

11
gcc/doc/tm.texi.in
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@ -858,11 +858,18 @@ word has the lowest number. This macro need not be a constant.
@defmac WORDS_BIG_ENDIAN
Define this macro to have the value 1 if, in a multiword object, the
most significant word has the lowest number. This applies to both
memory locations and registers; GCC fundamentally assumes that the
order of words in memory is the same as the order in registers. This
memory locations and registers; see @code{REG_WORDS_BIG_ENDIAN} if the
order of words in memory is not the same as the order in registers. This
macro need not be a constant.
@end defmac
@defmac REG_WORDS_BIG_ENDIAN
On some machines, the order of words in a multiword object differs between
registers in memory. In such a situation, define this macro to describe
the order of words in a register. The macro @code{WORDS_BIG_ENDIAN} controls
the order of words in memory.
@end defmac
@defmac FLOAT_WORDS_BIG_ENDIAN
Define this macro to have the value 1 if @code{DFmode}, @code{XFmode} or
@code{TFmode} floating point numbers are stored in memory with the word

8
gcc/reload.c
View File

@ -2218,15 +2218,15 @@ operands_match_p (rtx x, rtx y)
else
j = REGNO (y);
/* On a WORDS_BIG_ENDIAN machine, point to the last register of a
/* On a REG_WORDS_BIG_ENDIAN machine, point to the last register of a
multiple hard register group of scalar integer registers, so that
for example (reg:DI 0) and (reg:SI 1) will be considered the same
register. */
if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD
if (REG_WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD
&& SCALAR_INT_MODE_P (GET_MODE (x))
&& i < FIRST_PSEUDO_REGISTER)
i += hard_regno_nregs[i][GET_MODE (x)] - 1;
if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (y)) > UNITS_PER_WORD
if (REG_WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (y)) > UNITS_PER_WORD
&& SCALAR_INT_MODE_P (GET_MODE (y))
&& j < FIRST_PSEUDO_REGISTER)
j += hard_regno_nregs[j][GET_MODE (y)] - 1;
@ -7251,7 +7251,7 @@ reload_adjust_reg_for_mode (rtx reloadreg, enum machine_mode mode)
regno = REGNO (reloadreg);
if (WORDS_BIG_ENDIAN)
if (REG_WORDS_BIG_ENDIAN)
regno += (int) hard_regno_nregs[regno][GET_MODE (reloadreg)]
- (int) hard_regno_nregs[regno][mode];

11
gcc/rtlanal.c
View File

@ -3289,7 +3289,7 @@ subreg_get_info (unsigned int xregno, enum machine_mode xmode,
return a negative offset so that we find the proper highpart
of the register. */
if (GET_MODE_SIZE (ymode) > UNITS_PER_WORD
? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN)
? REG_WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN)
info->offset = nregs_xmode - nregs_ymode;
else
info->offset = 0;
@ -3344,6 +3344,15 @@ subreg_get_info (unsigned int xregno, enum machine_mode xmode,
gcc_assert ((GET_MODE_SIZE (xmode) % GET_MODE_SIZE (ymode)) == 0);
gcc_assert ((nregs_xmode % nregs_ymode) == 0);
if (WORDS_BIG_ENDIAN != REG_WORDS_BIG_ENDIAN
&& GET_MODE_SIZE (xmode) > UNITS_PER_WORD)
{
HOST_WIDE_INT xsize = GET_MODE_SIZE (xmode);
HOST_WIDE_INT ysize = GET_MODE_SIZE (ymode);
HOST_WIDE_INT off_low = offset & (ysize - 1);
HOST_WIDE_INT off_high = offset & ~(ysize - 1);
offset = (xsize - ysize - off_high) | off_low;
}
/* The XMODE value can be seen as a vector of NREGS_XMODE
values. The subreg must represent a lowpart of given field.
Compute what field it is. */