[ARM] Turning off 64bits ops in Neon

[ARM] Turning off 64bits ops in Neon

2013-03-21  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/
	* config/arm/arm-protos.h (tune_params): Add
	prefer_neon_for_64bits field.
	* config/arm/arm.c (prefer_neon_for_64bits): New variable.
	(arm_slowmul_tune): Default prefer_neon_for_64bits to false.
	(arm_fastmul_tune, arm_strongarm_tune, arm_xscale_tune): Ditto.
	(arm_9e_tune, arm_v6t2_tune, arm_cortex_tune): Ditto.
	(arm_cortex_a15_tune, arm_cortex_a5_tune): Ditto.
	(arm_cortex_a9_tune, arm_v6m_tune, arm_fa726te_tune): Ditto.
	(arm_option_override): Handle -mneon-for-64bits new option.
	* config/arm/arm.h (TARGET_PREFER_NEON_64BITS): New macro.
	(prefer_neon_for_64bits): Declare new variable.
	* config/arm/arm.md (arch): Rename neon_onlya8 and neon_nota8 to
	avoid_neon_for_64bits and neon_for_64bits. Remove onlya8 and
	nota8.
	(arch_enabled): Handle new arch types. Remove support for onlya8
	and nota8.
	(one_cmpldi2): Use new arch names.
	* config/arm/arm.opt (mneon-for-64bits): Add option.
	* config/arm/neon.md (adddi3_neon, subdi3_neon, iordi3_neon)
	(anddi3_neon, xordi3_neon, ashldi3_neon, <shift>di3_neon): Use
	neon_for_64bits instead of nota8 and avoid_neon_for_64bits instead
	of onlya8.
	* doc/invoke.texi (-mneon-for-64bits): Document.

	gcc/testsuite:
	* gcc.target/arm/neon-for-64bits-1.c: New tests.
	* gcc.target/arm/neon-for-64bits-2.c: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@196876 138bc75d-0d04-0410-961f-82ee72b054a4