From ff3f395157c42a6d2c922de085f5a890834f975b Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@codesourcery.com>
Date: Mon, 29 Jul 2013 14:37:30 +0000
Subject: linux.h (GLIBC_DYNAMIC_LINKER): Handle `-mnan=2008'.

	gcc/
	* config/mips/linux.h (GLIBC_DYNAMIC_LINKER): Handle `-mnan=2008'.
	(UCLIBC_DYNAMIC_LINKER): New macro.
	* config/mips/linux64.h (GLIBC_DYNAMIC_LINKER32): Handle
	`-mnan=2008'.
	(GLIBC_DYNAMIC_LINKER64, GLIBC_DYNAMIC_LINKERN32): Likewise.
	(UCLIBC_DYNAMIC_LINKER32): Undefine macro first.  Handle
	`-mnan=2008'.
	(UCLIBC_DYNAMIC_LINKER64): Redefine macro.
	(UCLIBC_DYNAMIC_LINKERN32): Likewise.
	* config/mips/mips-modes.def: Remove RESET_FLOAT_FORMAT calls
	for SF and DF modes.  Use ieee_quad_format for TF mode.
	* config/mips/mips-opts.h (mips_ieee_754_setting): New enum.
	* config/mips/mips.c (mips_file_start): Output a `.nan' directive.
	(mips_option_override): Handle `-mnan=legacy'.
	* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Handle
	`-mabs=2008' and `-mnan=2008'.
	(OPTION_DEFAULT_SPECS): Add "nan" default.
	(ASM_SPEC): Handle `-mnan='.
	[!HAVE_AS_NAN] (HAVE_AS_NAN): New macro.
	* config/mips/mips.md (abs<mode>2): Handle `-mabs=2008', update
	comment accordingly.
	(neg<mode>2): Likewise.
	* config/mips/mips.opt (mabs, mnan): New options.
	* doc/install.texi (Configuration): Document `--with-nan=' option.
	* doc/invoke.texi (Option Summary): List MIPS `-mabs=' and
	`-mnan=' options.
	(MIPS Options): Document them.
	* config.gcc <mips*-*-*>: Handle `--with-nan='.
	* configure.ac <mips*-*-*>: Check for GAS `-mnan=2008' support.
	* configure: Regenerate.
	* config.in: Regenerate.

	gcc/testsuite/
	* gcc.target/mips/fabs-2008.c: New test case.
	* gcc.target/mips/fabs-legacy.c: New test case.
	* gcc.target/mips/fabsf-2008.c: New test case.
	* gcc.target/mips/fabsf-legacy.c: New test case.
	* gcc.target/mips/fneg-2008.c: New test case.
	* gcc.target/mips/fneg-legacy.c: New test case.
	* gcc.target/mips/fneg-2008.c: New test case.
	* gcc.target/mips/fneg-legacy.c: New test case.
	* gcc.target/mips/nan-2008.c: New test case.
	* gcc.target/mips/nan-legacy.c: New test case.
	* gcc.target/mips/nanf-2008.c: New test case.
	* gcc.target/mips/nanf-legacy.c: New test case.
	* gcc.target/mips/nans-2008.c: New test case.
	* gcc.target/mips/nans-legacy.c: New test case.
	* gcc.target/mips/nansf-2008.c: New test case.
	* gcc.target/mips/nansf-legacy.c: New test case.
	* gcc.target/mips/mips.exp: Handle `-mabs=' and `-mnan='.

From-SVN: r201313
---
 gcc/doc/install.texi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'gcc/doc/install.texi')

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index e05cbed..9e5ba5e 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -1221,6 +1221,24 @@ ISA for floating-point arithmetics.  You can select either @samp{sse} which
 enables @option{-msse2} or @samp{avx} which enables @option{-mavx} by default.
 This option is only supported on i386 and x86-64 targets.
 
+@item --with-nan=@var{encoding}
+On MIPS targets, set the default encoding convention to use for the
+special not-a-number (NaN) IEEE 754 floating-point data.  The
+possibilities for @var{encoding} are:
+@table @code
+@item legacy
+Use the legacy encoding, as with the @option{-mnan=legacy} command-line
+option.
+@item 2008
+Use the 754-2008 encoding, as with the @option{-mnan=2008} command-line
+option.
+@end table
+To use this configuration option you must have an assembler version
+installed that supports the @option{-mnan=} command-line option too.
+In the absence of this configuration option the default convention is
+the legacy encoding, as when neither of the @option{-mnan=2008} and
+@option{-mnan=legacy} command-line options has been used.
+
 @item --with-divide=@var{type}
 Specify how the compiler should generate code for checking for
 division by zero.  This option is only supported on the MIPS target.
-- 
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