[arm-embedded] Backport mainline 171449 .. 177759

[arm-embedded] Backport mainline 171449 .. 177759

[Joey Ye]

Backport following mainline revs to ARM/embedded-4_6-branch: 
171449, 172777, 174894, 175588, 176867, 177759

Committed.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Backport r177759 from mainline
	2011-08-15  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

	PR target/50022
	* config/arm/arm.c (output_move_double): Add 2 parameters
	to count the number of insns emitted and whether to emit or not.
	Use the flag to decide when to emit and count number of instructions
	that will be emitted.
	Handle case where output_move_double might be called for calculating
	lengths with an invalid constant.
	(arm_count_output_move_double_insns): Define.
	* config/arm/arm-protos.h (arm_count_output_move_double_insns):
Declare.
	(output_move_double): Adjust prototype.
	* config/arm/vfp.md ("*movdi_vfp"): Adjust call to
	output_move_double.
	("*movdi_vfp_cortexa8"): Likewise and add attribute
	for ce_count.
	* config/arm/arm.md ("*arm_movdi"): Adjust call to
output_move_double.
	("*movdf_soft_insn"): Likewise.
	* config/arm/cirrus.md ("*cirrus_arm_movdi"): Likewise.
	("*cirrus_thumb2_movdi"): Likewise.
	("*thumb2_cirrus_movdf_hard_insn"): Likewise.
	("*cirrus_movdf_hard_insn"): Likewise.
	* config/arm/neon.md (*neon_mov<mode> VD): Likewise.
	* config/arm/iwmmxt.md ("*iwmmxt_arm_movdi"): Likewise.
	("mov<mode>_internal VMMX"): Likewise.
	* config/arm/fpa.md (*movdf_fpa, *thumb2_movdf_fpa): Likewise.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Backport r176867 from mainline
	2011-07-28  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

	* config/arm/vfp.md ("*movdf_vfp"): Handle the VFP constraints
	before the core constraints. Adjust attributes.
	(*thumb2_movdf_vfp"): Likewise.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Backport r175588 from mainline
	2011-06-28  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

	* config/arm/vfp.md ("*divsf3_vfp"): Replace '+' constraint modifier
	with '=' constraint modifier.
	(*divdf3_vfp): Likewise.
	("*mulsf3_vfp"): Likewise.
	("*muldf3_vfp"): Likewise.
	("*mulsf3negsf_vfp"): Likewise.
	("*muldf3negdf_vfp"): Likewise.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Backport r174894 from mainline
	2011-06-10  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>
	    Richard Earnshaw  <rearnsha@arm.com>

	* config/arm/arm.c (const_ok_for_op): Check to see
	if mvn can be used.
	* config/arm/vfp.md (*arm_movdi_vfp): Delete.
	(*thumb2_movdi_vfp): Delete.
	(*arm_movdi_vfp_cortexa8): Delete.
	(*movdi_vfp): Consolidate from *arm_movdi_vfp and *thumb2_movdi_vfp.
	(*movdi_vfp_cortexa8): Likewise.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Backport r172777 from mainline
	2011-04-20  Andrew Stubbs  <ams@codesourcery.com>

	* config/arm/arm.c (arm_gen_constant): Move movw support ....
	(const_ok_for_op): ... to here.

2011-09-19  Jiangning Liu  <jiangning.liu@arm.com>

	Partially backport r171449 from mainline
	2011-03-25  Bernd Schmidt  <bernds@codesourcery.com>
 	    Andrew Stubbs  <ams@codesourcery.com>

	* config/arm/vfp.md (arm_movdi_vfp): Enable only when not tuning
	for Cortex-A8.
	(arm_movdi_vfp_cortexa8): New pattern.
	* config/arm/arm.md: Move include arm-tune.md up a bit.
	(define_attr "arch"): Add "onlya8" and "nota8" values.
	(define_attr "arch_enabled"): Handle "onlya8" and "nota8".