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simplify-rtx.c (simplify_const_unary_operation): Handle SS_ABS. 

* simplify-rtx.c (simplify_const_unary_operation): Handle
	SS_ABS.
	* doc/rtl.texi: Document ss_abs.

From-SVN: r153003
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Jie Zhang 2009-10-20 03:33:57 +00:00 committed by Jie Zhang
parent 8c44c845be
commit 91c29f68ef
3 changed files with 12 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-10-20 Jie Zhang <jie.zhang@analog.com>
* simplify-rtx.c (simplify_const_unary_operation): Handle
SS_ABS.
* doc/rtl.texi: Document ss_abs.
2009-10-19 Jakub Jelinek <jakub@redhat.com>
* c-common.c (c_parse_error): Handle CPP_UTF8STRING.

5
gcc/doc/rtl.texi
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@ -2364,9 +2364,14 @@ Similar but represent left and right rotate. If @var{c} is a constant,
use @code{rotate}.
@findex abs
@findex ss_abs
@cindex absolute value
@item (abs:@var{m} @var{x})
@item (ss_abs:@var{m} @var{x})
Represents the absolute value of @var{x}, computed in mode @var{m}.
@code{ss_abs} ensures that an out-of-bounds result saturates to the
maximum signed value.
@findex sqrt
@cindex square root

1
gcc/simplify-rtx.c
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@ -1245,6 +1245,7 @@ simplify_const_unary_operation (enum rtx_code code, enum machine_mode mode,
case US_TRUNCATE:
case SS_NEG:
case US_NEG:
case SS_ABS:
return 0;
default: