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nds32.h (NDS32_MODE_TYPE_ALIGN): New macro. 

2013-12-20  Chung-Ju Wu  <jasonwucj@gmail.com>

	* config/nds32/nds32.h (NDS32_MODE_TYPE_ALIGN): New macro.
	(NDS32_AVAILABLE_REGNUM_FOR_ARG): Use more accurate alignment checking
	to determine available register number.
	* config/nds32/nds32.c (nds32_needs_double_word_align): Use new
	macro NDS32_MODE_TYPE_ALIGN.
	(nds32_function_arg): Refine code layout.

From-SVN: r206142
This commit is contained in:
Chung-Ju Wu 2013-12-20 09:02:58 +00:00 committed by Chung-Ju Wu
parent 7920b6d673
commit 634bdae96b
3 changed files with 30 additions and 10 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2013-12-20 Chung-Ju Wu <jasonwucj@gmail.com>
* config/nds32/nds32.h (NDS32_MODE_TYPE_ALIGN): New macro.
(NDS32_AVAILABLE_REGNUM_FOR_ARG): Use more accurate alignment checking
to determine available register number.
* config/nds32/nds32.c (nds32_needs_double_word_align): Use new
macro NDS32_MODE_TYPE_ALIGN.
(nds32_function_arg): Refine code layout.
2013-12-19 Jeff Law <law@redhat.com>
* doc/invoke.texi: (dump-rtl-ree): Fix typo and clarify ree

12
gcc/config/nds32/nds32.c
View File

@ -1438,8 +1438,8 @@ nds32_needs_double_word_align (enum machine_mode mode, const_tree type)
{
unsigned int align;
/* When 'type' is nonnull, there is no need to look at 'mode'. */
align = (type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode));
/* Pick up the alignment according to the mode or type. */
align = NDS32_MODE_TYPE_ALIGN (mode, type);
return (align > PARM_BOUNDARY);
}
@ -1853,10 +1853,10 @@ nds32_function_arg (cumulative_args_t ca, enum machine_mode mode,
if (NDS32_ARG_PASS_IN_REG_P (cum->reg_offset, mode, type))
{
/* Pick up the next available register number. */
return gen_rtx_REG (mode,
NDS32_AVAILABLE_REGNUM_FOR_ARG (cum->reg_offset,
mode,
type));
unsigned int regno;
regno = NDS32_AVAILABLE_REGNUM_FOR_ARG (cum->reg_offset, mode, type);
return gen_rtx_REG (mode, regno);
}
else
{

19
gcc/config/nds32/nds32.h
View File

@ -126,6 +126,11 @@ enum nds32_16bit_address_type
#define NDS32_SINGLE_WORD_ALIGN_P(value) (((value) & 0x03) == 0)
#define NDS32_DOUBLE_WORD_ALIGN_P(value) (((value) & 0x07) == 0)
/* Get alignment according to mode or type information.
When 'type' is nonnull, there is no need to look at 'mode'. */
#define NDS32_MODE_TYPE_ALIGN(mode, type) \
(type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode))
/* Round X up to the nearest double word. */
#define NDS32_ROUND_UP_DOUBLE_WORD(value) (((value) + 7) & ~7)
@ -142,12 +147,18 @@ enum nds32_16bit_address_type
/* This macro is used to return the register number for passing argument.
We need to obey the following rules:
1. If it is required MORE THAN one register,
make sure the register number is a even value.
we need to further check if it really needs to be
aligned on double words.
a) If double word alignment is necessary,
the register number must be even value.
b) Otherwise, the register number can be odd or even value.
2. If it is required ONLY one register,
the register number can be odd or even value. */
#define NDS32_AVAILABLE_REGNUM_FOR_ARG(reg_offset, mode, type) \
((NDS32_NEED_N_REGS_FOR_ARG (mode, type) > 1) \
? (((reg_offset) + NDS32_GPR_ARG_FIRST_REGNUM + 1) & ~1) \
#define NDS32_AVAILABLE_REGNUM_FOR_ARG(reg_offset, mode, type) \
((NDS32_NEED_N_REGS_FOR_ARG (mode, type) > 1) \
? ((NDS32_MODE_TYPE_ALIGN (mode, type) > PARM_BOUNDARY) \
? (((reg_offset) + NDS32_GPR_ARG_FIRST_REGNUM + 1) & ~1) \
: ((reg_offset) + NDS32_GPR_ARG_FIRST_REGNUM)) \
: ((reg_offset) + NDS32_GPR_ARG_FIRST_REGNUM))
/* This macro is to check if there are still available registers