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extend.texi (AVR Built-in Functions): Document __builtin_avr_nops.

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* doc/extend.texi (AVR Built-in Functions): Document
	__builtin_avr_nops.
	* config/avr/builtins.def (NOPS): New.
	* config/avr/avr.c (avr_expand_nops): New static function.
	(avr_expand_builtin): Use it to handle AVR_BUILTIN_NOPS.

From-SVN: r238947
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Georg-Johann Lay 2016-08-01 12:23:17 +00:00 committed by Georg-Johann Lay
parent 7481147265
commit ee52b11b30
4 changed files with 42 additions and 0 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2016-08-01 Georg-Johann Lay <avr@gjlay.de>
* doc/extend.texi (AVR Built-in Functions): Document
__builtin_avr_nops.
* config/avr/builtins.def (NOPS): New.
* config/avr/avr.c (avr_expand_nops): New static function.
(avr_expand_builtin): Use it to handle AVR_BUILTIN_NOPS.
2016-08-01 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* config/aarch64/aarch64.c (aarch64_classify_address): Use DImode when

25
gcc/config/avr/avr.c
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@ -12714,6 +12714,18 @@ avr_expand_delay_cycles (rtx operands0)
}
static void
avr_expand_nops (rtx operands0)
{
unsigned HOST_WIDE_INT n_nops = UINTVAL (operands0) & GET_MODE_MASK (HImode);
while (n_nops--)
{
emit_insn (gen_nopv (const1_rtx));
}
}
/* Compute the image of x under f, i.e. perform x --> f(x) */
static int
@ -13388,6 +13400,19 @@ avr_expand_builtin (tree exp, rtx target,
return NULL_RTX;
}
case AVR_BUILTIN_NOPS:
{
arg0 = CALL_EXPR_ARG (exp, 0);
op0 = expand_expr (arg0, NULL_RTX, VOIDmode, EXPAND_NORMAL);
if (!CONST_INT_P (op0))
error ("%s expects a compile time integer constant", bname);
else
avr_expand_nops (op0);
return NULL_RTX;
}
case AVR_BUILTIN_INSERT_BITS:
{
arg0 = CALL_EXPR_ARG (exp, 0);

1
gcc/config/avr/builtins.def
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@ -51,6 +51,7 @@ DEF_BUILTIN (FMULSU, 2, int_ftype_char_uchar, fmulsu, NULL)
/* More complex stuff that cannot be mapped 1:1 to an instruction. */
DEF_BUILTIN (DELAY_CYCLES, -1, void_ftype_ulong, nothing, NULL)
DEF_BUILTIN (NOPS, -1, void_ftype_ulong, nothing, NULL)
DEF_BUILTIN (INSERT_BITS, 3, uchar_ftype_ulong_uchar_uchar, insert_bits, NULL)
DEF_BUILTIN (FLASH_SEGMENT, 1, char_ftype_const_memx_ptr, flash_segment, NULL)

8
gcc/doc/extend.texi
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@ -12552,6 +12552,14 @@ __builtin_avr_insert_bits (0xffff3210, bits, val)
__builtin_avr_insert_bits (0x01234567, bits, 0)
@end smallexample
@smallexample
void __builtin_avr_nops (unsigned count)
@end smallexample
@noindent
Insert @code{count} @code{NOP} instructions.
The number of instructions must be a compile-time integer constant.
@node Blackfin Built-in Functions
@subsection Blackfin Built-in Functions