extend.texi (Half-Precision): Update wording to reflect that there are now multiple -mfpu options that enable...

2009-11-09  Paul Brook  <paul@codesourcery.com>
	Daniel Jacobowitz  <dan@codesourcery.com>
	Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* doc/extend.texi (Half-Precision): Update wording to reflect
	that there are now multiple -mfpu options that enable fp16
	hardware support.
	* doc/invoke.texi: Update list of ARM -mfpu= options.
	* config.gcc: Update ARM --with-fpu option list.
	* config/arm/arm.c (all_fpus): Add vfpv3-fp16, vfpv3-d16-fp16,
	vfpv3xd and vfpv3xd-fp16.
	(use_vfp_abi): New function.
	(aapcs_vfp_is_call_or_return_candidate): Avoid double precision regs
	when undesirable.
	(aapcs_vfp_is_return_candidate, aapcs_vfp_is_call_candidate,
	aapcs_vfp_allocate_return_reg): Use use_vfp_abi.
        (arm_rtx_costs_1, arm_size_rtx_costs, arm_fastmul_rtx_costs,
        arm_9e_rtx_costs): Only expect double-precision operations if the FPU
        provides them.
	(coproc_secondary_reload_class): Reload HFmode via GENERAL_REGS if no
	NEON.
	(arm_print_operand): Handle 'p' modifier.
	(arm_hard_regno_mode_ok): : Allow HFmode in VFP registers if
	TARGET_FP16.
	* config/arm/arm.h (TARGET_VFP_SINGLE, TARGET_VFP_DOUBLE): Define.
	(TARGET_FP16): Define.
	* config/arm/vfp.md: Disable double-precision patterns if the FPU
	does not provide them.
	(arm_movdi_vfp, thumb2_movdi_vfp): Use fcpys to move
	double-precision values on a single-precision FPU.
        (movdf_vfp, thumb2_movdf_vfp): Likewise.  Use "Dy" for
        double-precision constants.
	(movhf_vfp_neon): New pattern (was movhf_vfp).
	(movhf_vfp): Remove NEON instructions.
	* config/arm/constraints.md: Add new "Dy" constraint for
	double-precision constants.  Update description of "Dv".
	* config/arm/arm.md: Disable double-precision patterns if the FPU
	does not provide them


Co-Authored-By: Daniel Jacobowitz <dan@codesourcery.com>
Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>

From-SVN: r154034